Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год

Применить Всего найдено 19344. Отображено 200.
02-07-2019 дата публикации

РУЛЕВОЙ МЕХАНИЗМ С ШАРИКОВОЙ ГАЙКОЙ ДЛЯ АВТОМОБИЛЯ И РУЛЕВОЕ УПРАВЛЕНИЕ ДЛЯ АВТОМОБИЛЯ

Номер: RU2693354C2

Группа изобретений относится к рулевому механизму с шариковой гайкой для автомобиля и рулевому управлению для автомобиля. Рулевой механизм имеет первую и вторую камеры 1, 8 цилиндра для рабочей среды, первую подводящую линию 20 для подачи рабочей среды насосом 12 в первую камеру 1 цилиндра и вторую подводящую линию для подачи рабочей среды насосом 12 во вторую камеру 8 цилиндра. Рулевой механизм имеет устройство 4 для гашения и/или успокоения пульсаций рабочей среды, которое расположено в первой подводящей линии 20 и/или второй подводящей линии. Обеспечивается гашение пульсаций рабочей среды, подаваемой насосом и возникающих при его работе. 2 н. и 15 з.п. ф-лы, 13 ил.

Подробнее
10-07-2016 дата публикации

РУЛЕВАЯ СИСТЕМА ПОВОРОТА КОЛЁС И ПОЛУРАМ ТРАКТОРА

Номер: RU2590762C2

Изобретение относится к области транспортного машиностроения. Рулевая система поворота колес и полурам трактора содержит гидроруль, сообщенный маслопроводами с гидроцилиндром поворота передних управляемых колес и связанный с гидроцилиндрами поворота полурам через стабилизатор соосности полурам. Стабилизатор соосности включает сигнальный гидроцилиндр, сообщены с гидрорулем. Гидроруль связан с гидроцилиндром поворота задних управляемых колес через стабилизатор прямолинейности их хода. Стабилизатор прямолинейности хода включает сигнальный гидроцилиндр, сообщенный маслопроводами с гидрорулем. Штоки сигнальных гидроцилиндров связаны со сжатыми на пороговое усилие центрирующими пружинами и соединены с гидрораспределителями. Управляющие каналы гидрораспределеителей сообщены с гидроцилиндрами поворота полурам и задних управляемых колес. Достигается улучшение управляемости трактора. 1 з.п. ф-лы, 1 ил.

Подробнее
27-11-2009 дата публикации

СИСТЕМА ОХЛАЖДЕНИЯ ГИДРАВЛИЧЕСКОГО РУЛЕВОГО УСИЛИТЕЛЯ ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU2374116C2

Изобретение относится к машиностроению и может быть использовано при конструировании и изготовлении системы охлаждения гидравлических рулевых усилителей транспортных средств. Система охлаждения содержит автономный контур охлаждения гидравлического рулевого усилителя и автономный контур охлаждения силовой установки. Контур охлаждения гидравлического рулевого усилителя включает насос, рулевой механизм, связанный механически с рулевым колесом, гидроцилиндр, первый радиатор, фильтр и бачок, связанные между собой гидравлически. Контур охлаждения силовой установки включает второй радиатор, термобиметаллический датчик, теплообменник, содержащий первую секцию, силовую установку и вентилятор, между собой связанные механически. Теплообменник дополнительно снабжен второй секцией, внутренние полости которого включают трубные и межтрубные полости. Межтрубные полости второй секции соединены с контуром охлаждения гидравлического рулевого усилителя, межтрубные полости первой секции соединены с системой ...

Подробнее
17-04-2020 дата публикации

СИСТЕМА УПРАВЛЕНИЯ ВОЗДУШНЫМ ПОТОКОМ ЧЕРЕЗ СИСТЕМУ УСИЛИТЕЛЯ РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА (ВАРИАНТЫ)

Номер: RU2719055C2

Группа изобретений относится к вариантам управления воздушным потоком через систему усилителя рулевого управления транспортного средства, а именно к системам для предотвращения перегрева системы усилителя рулевого управления. В одном из примеров система содержит вентилятор охлаждения двигателя на основе угла поворота рулевого колеса и частоты вращения двигателя. Вентилятор охлаждения может эксплуатироваться в течение некоторого интервала времени на основе угла поворота рулевого колеса и частоты вращения двигателя, что позволяет избежать необходимости использования специального датчика температуры гидравлической жидкости усилителя рулевого управления и предотвратить перегрев системы усилителя рулевого управления. 2 н. и 14 з.п. ф-лы, 7 ил.

Подробнее
18-07-2017 дата публикации

ГИДРОСИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ ДЛЯ БОЛЬШЕГРУЗНЫХ ТРАНСПОРТНЫХ СРЕДСТВ

Номер: RU2625695C1

Изобретение относится к области транспортного машиностроения. Гидросистема рулевого управления для большегрузных транспортных средств содержит усилитель потока рабочей жидкости под давлением, сообщенный с распределителем рулевого механизма и со штоковыми полостями четырех цилиндров, и два дополнительных распределителя, сообщенные с поршневыми полостями четырех цилиндров. Четыре цилиндра выполнены одноштоковыми. Усилитель потока рабочей жидкости под давлением снабжен распределителем выбора направления потока рабочей жидкости под давлением, сообщенным со штоковыми полостями четырех цилиндров. Поршневые полости каждой пары цилиндров сообщены с одним из дополнительных распределителей. Управляющие полости дополнительных распределителей сообщены с электромагнитными клапанами, соединенными с бесконтактными датчиками положения подвижных элементов транспортного средства. Достигается упрощение конструкции и технического обслуживания гидросистемы. 5 з.п. ф-лы, 8 ил.

Подробнее
20-09-1999 дата публикации

РУЛЕВОЕ УПРАВЛЕНИЕ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU2137648C1

Изoбрeтeниe относится к рулевым управлениям транспортных средств с гидравлическим приводом. Изобретение направлено на уменьшение усилия на рулевом колесе при больших моментах сопротивлению повороту управляемых колес путем снижения дополнительного усилия, создаваемого реактивными плунжерами за счет отключения их путем перепуска рабочей жидкости из межплунжерной полости (полости между реактивными плунжерами) в сливную магистраль при максимальном давлении в усилителе. Рулевое управление колесного транспортного средства содержит рулевое колесо, кинематически связанное с рулевым механизмом типа винт-шариковая гайка-рейка-зубчатый сектор, кинематически связанным с рулевым приводом, насос гидравлического усилителя, гидравлически связанный с баком, трехпозиционным четырехлинейным распределителем с перепускным клапаном, управляемым давлением рабочей жидкости и датчиком давления рабочей жидкости, кинематически связанным через реактивные плунжеры и центрирующие пружины с рулевой передачей винт-шариковая ...

Подробнее
02-02-2021 дата публикации

Рулевое управление многоосной колесной машины высокой проходимости

Номер: RU202116U1

Полезная модель относится к области машиностроения, в частности к конструкции рулевого управления для многоосной колесной машины высокой проходимости.Предлагаемое устройство содержит: клапан гидроусилителя руля 1; гидрораспределитель 2; бачок 3; гидронасос 4; фильтр 5; предохранительный клапан 6; электромагнитные замки 7; стопорную тягу переменной жесткости 8; продольную тягу переменной жесткости 9; рулевое колесо 10; гидроцилиндры 11.Устройство рулевого управления многоосной колесной машины высокой проходимости, содержащее: клапан гидроусилителя руля; гидрораспределитель; рулевое колесо; бачок; гидронасос; фильтр; предохранительный клапан; электромагнитные замки; стопорную и продольную тяги переменной жесткости (дополнительные рулевые тяги переменной жесткости), а также гидроцилиндры, позволяет посредством дополнительных рулевых тяг переменной жесткости, передающих управляющее воздействие от рулевого колеса, управлять ведущими колесами задних мостов для повышения маневренности, а применение ...

Подробнее
16-02-1999 дата публикации

РУЛЕВОЙ МЕХАНИЗМ ТРАНСПОРТНОГО СРЕДСТВА С ГИДРОУСИЛИТЕЛЕМ

Номер: RU9199U1

Рулевой механизм транспортного средства с гидроусилителем, содержащий картер, размещенные в нем поршень с зубчатой рейкой, связанный кинематически с винтом, вал сошки с зубчатым сектором, входящим в зацепление с зубчатой рейкой, на одном конце винта установлен подшипник, размещенный в стакане, установленном и зафиксированном в картере, на другом конце винта размещен подшипник, установленный в корпусе распределителя, жестко соединенном с картером, в корпусе распределителя размещены гильза, ротор, соединенный торсионным валом с винтом, причем гильза, торсионный вал и винт жестко связаны между собой, отличающийся тем, что он снабжен регулировочной гайкой, размещенной внутри картера, в которую установлен своей резьбовой частью стакан, причем на внешнем диаметре регулировочной гайки выполнен выступ, взаимодействующий с пазом в картере, а в торце поршня выполнена выточка с возможностью размещения в ней при крайнем левом положении поршня регулировочной гайки и резьбовой части стакана.

Подробнее
27-03-2004 дата публикации

МНОГООСНОЕ АВТОШАССИ

Номер: RU36806U1

Подробнее
29-08-2024 дата публикации

Шахтная самоходная машина

Номер: RU228470U1

Полезная модель относится к горной технике. Шахтная самоходная машина содержит ходовую часть с рамой, первую пару движителей, вторую пару движителей, механизмы управления поворотом упомянутых первой и второй пары движителей. Каждый из упомянутых движителей выполнен в виде мотор-колеса. Первая пара упомянутых мотор колес установлена в неподвижных опорах с возможностью поворота вокруг вертикальной оси на балке, которая соединена с упомянутой рамой с возможностью качания вокруг горизонтальной оси симметрии машины. Вторая пара упомянутых мотор-колес установлена в неподвижных опорах с возможностью поворота вокруг вертикальной оси на упомянутой раме. Каждый механизм управления включает трехплечевой рычаг, гидроцилиндр, связывающий раму с первым плечом упомянутого трехплечевого рычага, и поперечные рулевые тяги, связывающие каждый движитель со вторым плечом упомянутого трехплечевого рычага. Третьи плечи трехплечевых рычагов обращены к противоположным сторонам машины и соединены друг с другом продольной ...

Подробнее
08-09-2020 дата публикации

Бак масляный гидросистемы рулевого управления

Номер: RU199582U1

Полезная модель относится к области транспортного машиностроения, а именно к бакам масляным гидросистем рулевого управления транспортных средств.Бак масляный гидросистемы рулевого управления содержит корпус 1, состоящий из соединенных верхней 2 и нижней 3 частей, горловину 4 в верхней части 2, съемную крышку 5, навинченную на горловине 4, впускной 6 и выпускной 7 патрубки в нижней части 3, расположенные внутри корпуса 1 цилиндрический фильтр 8, успокоитель 9 колебаний рабочей жидкости и устройство 10 контроля уровня рабочей жидкости, установленное в съемной крышке 5.Цилиндрический фильтр 8 бака масляного неподвижно установлен в гнезде 17 дна нижний части 3 корпуса 1 посредством крепежного элемента 18, расположенного на центральной продольной оси «а» цилиндрического фильтра 8.Успокоитель 9 колебаний рабочей жидкости бака масляного выполнен на верхней стенке 20 цилиндрического фильтра 8 в форме вытянутых вверх (вертикально ориентированных) четырех плоских стенок 21 и 22 одинаковой высоты ...

Подробнее
15-08-2024 дата публикации

Гидрообъемное рулевое управление большегрузного транспортного средства

Номер: RU228095U1

Полезная модель относится к транспортному машиностроению, а именно к рулевым управлениям транспортных средств высокой грузоподъемностью. Гидрообъемное рулевое управление большегрузного транспортного средства, состоящее из гидробака (1) со встроенным сливным фильтром (18), регулируемого насоса (2), гидропневмоаккумуляторов (11), насоса-дозатора (14), двух гидроцилиндров (15 и 16), напорной и сливной гидролиний, в котором регулируемый насос (2) оснащен LS-регулятором и гидролинией обратной связи, обеспечивающими работу регулируемого насоса с автоматическим регулированием производительности в зависимости от нагрузки, при этом на сливной гидролинии установлен теплообменник (16).

Подробнее
04-04-2019 дата публикации

ГИДРООБЪЕМНОЕ РУЛЕВОЕ УПРАВЛЕНИЕ ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU188254U1

Гидрообъемное рулевое управления транспортного средства, применяемое в дорожно-строительных машинах тяжелого класса, задачей которого является увеличение полезной мощности системы гидрообъемного рулевого управления. Указанный технический результат достигается за счет увеличения объемной постоянной, путем использования в качестве усилителя потока гидромотора и гидронасоса, связанных между собой кинематически. Критерий «положительный эффект» подтверждается тем, что использование в качестве усилителя потока гидронасоса и гидромотора в напорной гидролинии устраняет зависимость точности работы гидрообъемного рулевого управления от изменений параметров рабочей жидкости.

Подробнее
30-05-1994 дата публикации

ГИДРОУСИЛИТЕЛЬ РУЛЯ

Номер: RU2013267C1

Использование: в рулевом управлении автомобиля. Цель изобретения - снизить усилие на рулевом колесе при неработающем двигателе. Когда двигатель автомобиля работает, насос гонит масло к цилиндру усилителя. Золотник перепускного клапана под давлением масла смещается, сжимает пружину, разъединяет полости гидроусилителя руля. В каналах к полостям устанавливаются клапаны, состоящие из штифта и пружины. 2 ил.

Подробнее
10-03-1995 дата публикации

ГИДРАВЛИЧЕСКАЯ СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU2030317C1

Использование: в рулевых управлениях транспортных средств с гидроприводом. Изобретение направлено на повышение эффективности работы рулевого управления колесного транспортного средства. Сущность изобретения: гидравлическая система рулевого управления колесного транспортного средства содержит основной четырехлинейный трехпозиционный распределитель 16, гидравлически связанный второй гидролинией 17 с гидробаком 3, а третьей 18 и четвертой 19 гидролиниями через нормально закрытый двухпозиционный распределитель 20 - с полостями силового цилиндра 9, кинематически связанный с рулевым колесом 21, штоком 10 силового цилиндра 9 и управляемыми колесами 23 вспомогательный четырехлинейный трехпозиционный распределитель 5, предохранительный 2 и редукционный 4 клапаны, два двухпозиционных распределителя 20,8 с приводом от датчика момента 24, имеющего механизм блокировки и расположенного на валу рулевого колеса 21, и два дросселя 11,12. Распределитель 5 управляется давлением рабочей жидкости и связан гидролиниями ...

Подробнее
20-11-1997 дата публикации

ГИДРОРУЛЬ ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU2096225C1

Использование: изобретение относится к области транспортного машиностроения, а именно к гидравлическим рулевым механизмам. Сущность изобретения, для использования гидроруля с дополнительным потребителем при упрощении конструкции, и снижении металлоемкости за счет уменьшения количества проточек в корпусе гидроруля и сохранении всех достигнутых в известной конструкции функциональных качеств за счет того, что проточки в корпусе выполнены в определенной последовательности, а расстояние между торцевыми поверхностями золотника выполнено больше расстояния между наружными кромками напорной и одной цилиндровой проточек с возможностью соединения внутренней полости гидроруля в одной из позиций золотника с одной цилиндровой проточкой, а в другой - с напорной проточкой. 2 ил.

Подробнее
27-02-1998 дата публикации

РУЛЕВОЕ УПРАВЛЕНИЕ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU2105688C1

Использование: изобретение относится к рулевому управлению колесного транспортного средства. Сущность изобретения: оно содержит рулевой привод и рулевой усилитель передних управляемых колес, кинематически связанные с рулевым колесом через рулевой механизм, а посредством муфты переменной длины - с рулевым приводом и рулевым усилителем задних управляемых колес. При движении транспортного средства со скоростью ниже критической по устойчивости против заноса муфта переменной длины блокируется рабочей жидкостью, поступающей от насоса через делитель потока и двухпозиционный распределитель. В результате задние управляемые колеса поворачиваются одновременно с передними. При движении со скоростью выше критической полости муфты переменной длины соединяются между собой. В этом случае при повороте передних управляемых колес задние будут находиться в нейтральном положении до тех пор, пока поршень муфты переменной длины не переместится в крайнее положение, то есть будет осуществляться запаздывание поворота ...

Подробнее
20-10-2012 дата публикации

СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ КОЛЕСАМИ МОСТОВ САМОХОДНОЙ МАШИНЫ

Номер: RU2464194C1

Изобретение относится к области транспортного машиностроения. Система рулевого управления колесами мостов поворотных колес самоходной машины содержит отдельный для каждого моста поворотных колес гидроусилитель и звенья прямой и обратной связи руля с поворотными колесами. Система содержит дистанционные маслопроводы, сообщающие гидроусилитель руля с отдельным гидроусилителем поворота колес. Гидроусилитель поворота колес содержит первый гидроцилиндр, подвижная часть которого связана шарнирно с рычагом поворота колеса, а полости сообщены с управляющими каналами гидрораспределителя. Входной и выходной каналы гидрораспределителя сообщены маслопроводами с насосной станцией. Через корпус и золотник гидрораспределитель связывает поворотное колесо с центрирующей пороговой пружиной и со вторым гидроцилиндром, полости которого сообщены с гидроусилителем руля дистанционными маслопроводами. Достигается улучшение управляемости самоходной машины. 1 ил.

Подробнее
10-09-1997 дата публикации

УСТРОЙСТВО ДЛЯ УПРАВЛЕНИЯ СОЧЛЕНЕННОЙ ДВУХТЕЛЕЖЕЧНОЙ ГУСЕНИЧНОЙ МАШИНОЙ

Номер: RU2089431C1

Использование: относится к транспортному машиностроению, в частности к системам управления шарнирно-сочлененных гусеничных машин. Сущность изобретения: устройство для управления сочлененной двухтележной гусеничной машиной включает в себя гидроцилиндр 1, связанный с передней и задней гусеничными тележками 2, 3. Передняя тележка 2 снабжена механизмом поворота простой дифференциал 10. Управление машиной осуществляется двухпозиционным трехлинейным гидроцилиндром 6 с ручным управлением, в первой позиции которого все гидролинии 4, 5, 7 разомкнуты, а во второй - управляющие полости гидроцилиндра сообщены между собой и с гидробаком. 1 ил.

Подробнее
10-10-2016 дата публикации

ПРИОРИТЕТНЫЙ КЛАПАН РУЛЕВОГО МЕХАНИЗМА ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU2599189C1

Изобретение относится к области транспортного машиностроения. Приоритетный клапан рулевого механизма транспортного средства состоит из корпуса с размещенным в нем подпружиненным распределительным золотником непрерывного действия. Приоритетный клапан имеет подводы от напорной линии, линии питания рабочего оборудования, линии питания гидроруля, линии управления, связанной с торцевой полостью золотника со стороны пружины. Золотник имеет две рабочие кромки. Первая кромка связывает напорный подвод с подводом линии питания рабочего оборудования. Вторая кромка связывает линию управления с подводом линии питания гидроруля. Рабочие кромки выполнены на наружных торцевых поверхностях золотника. Между первой и второй рабочими кромками установлен дроссель. Достигается уменьшение габаритных размеров приоритетного клапана. 3 ил.

Подробнее
10-08-1998 дата публикации

ГИДРАВЛИЧЕСКИЙ УСИЛИТЕЛЬ РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА С КЛАПАНОМ ВЫКЛЮЧЕНИЯ УСИЛИТЕЛЯ В КРАЙНИХ ПОЛОЖЕНИЯХ

Номер: RU2116924C1

Гидравлический усилитель включает в себя корпус, шариковые запорные элементы и стержневые толкатели, размещенные в сквозном ступенчатом отверстии поршня-рейки. Корпус клапана состоит из двух цилиндрических втулок с кольцевыми проточками на наружных поверхностях, выходящими на торцы втулок с одной стороны. Втулки установлены до упора в торец ступенчатого отверстия поршня-рейки и друг в друга торцами с кольцевыми проточками, которые при совмещении образуют полость для установки уплотнительного элемента. Втулки зафиксированы в осевом направлении промежуточной проставкой и стопорным кольцом. А каждый толкатель имеет на одном конце плоские заплечики, расположенные в полостях, ограниченных торцами втулок и перепадами диаметров ступенчатого отверстия поршня-рейки с одной стороны и ступенчатого отверстия промежуточной проставки с другой стороны, что позволяет упростить конструкцию клапана и повысить его технологичность изготовления и уровень ремонтопригодности. 3 ил.

Подробнее
10-03-1995 дата публикации

ГИДРАВЛИЧЕСКАЯ СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU92014704A
Принадлежит:

Устройство относится к рулевым управлениям транспортных средств с гидроприводом и направлено на расширение функциональных возможностей гидравлической системы рулевого управления колесного транспортного средства за счет обеспечения возможности регулирования скорости возврата управляемых колес в нейтральное положение. Гидравлическая система рулевого управления колесного транспортного средства содержит основной распределитель, кинематически связанный через насос-мотор с рулевым колесом и гидравлически соединенный с силовым цилиндром и гидробаком, насос-мотором и через вспомогательный распределитель, имеющий привод от датчика положения поршня, с полостями силового цилиндра, трехлинейный двухпозиционный распределитель, клапан ИЛИ и регулятор потока. Трехлинейный двухпозиционный распределитель управляется давлением рабочей жидкости и соединен первой гидролинией с насосом, второй - с редукционным клапаном, а третьей гидролинией - с регулятором потока. Гидролинией управления трехлинейный двухпозиционный ...

Подробнее
27-08-1996 дата публикации

ГИДРАВЛИЧЕСКИЙ РУЛЕВОЙ МЕХАНИЗМ

Номер: RU94014733A
Принадлежит:

Изобретение относится к транспортному машиностроению, а именно к гидравлическим рулевым механизмам транспортных средств. Гидравлический рулевой механизм состоит из распределителя, планетарного редуктора, гидромотора обратной связи, а также встроенных противоударных клапанов. Оси противоударных клапанов расположены перпендикулярно продольной оси механизма. Изобретение позволяет избежать демонтажа и частичной разборки механизма при регулировке противоударных клапанов, что упрощает процесс регулировки и повышает надежность работы гидравлического рулевого механизма.

Подробнее
20-06-2000 дата публикации

РУЛЕВОЕ УПРАВЛЕНИЕ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU98116630A
Принадлежит:

Рулевое управление колесного транспортного средства, содержащее основной четырехлинейный трехпозиционный распределитель рулевого управления, двумя линиями гидравлически соединенный с насосом и баком и посредством двух других гидролиний - с полостями исполнительного гидроцилиндра, кинематически связанного с передними управляемыми колесами с одной стороны и полостями исполнительного гидроцилиндра, кинематически связанного с задними управляемыми колесами и со стабилизатором нейтрального положения задних управляемых колес с другой, отличающееся тем, что оно дополнительно снабжено четырехлинейным трехпозиционным вспомогательным распределителем с открытой нейтралью, управляемым датчиком угла поворота рулевого колеса и стабилизатором нейтрального положения задних управляемых колес, причем, вспомогательный распределитель установлен в гидролинии между основным распределителем и исполнительным механизмом задних управляемых колес таким образом, что две его гидролинии соединены с основным распределителем ...

Подробнее
20-03-1999 дата публикации

РАСПРЕДЕЛИТЕЛЬ ГИДРАВЛИЧЕСКОГО УСИЛИТЕЛЯ РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU97103052A
Принадлежит:

... 1. Распределитель гидравлического усилителя рулевого управления транспортного средства, включающий корпус, в полость которого выходят каналы для подвода и слива рабочей жидкости, а также каналы для соединения с рабочими камерами гидроусилителя, размещенную в нем гильзу, охватывающую выходной вал и имеющую каналы для подвода рабочей жидкости к рабочим кромкам распределителя и к каналам, выходящим в рабочие камеры гидроусилителя, выходной вал, являющийся продолжением винта рулевого механизма, с осевым отверстием и рядом сквозных радиальных цилиндрических отверстий по окружности, входной вал с осевым отверстием и рядом радиальных цилиндрических отверстий по окружности, размещенный в осевом отверстии выходного вала, соединенный с выходным валом с возможностью ограниченного относительного углового перемещения и связанный с ним торсионом, причем дросселирующие щели распределителя образованы пересекающимися кромками выполненных с угловым смещением радиальных отверстий выходного и входного валов ...

Подробнее
20-11-2004 дата публикации

ГИДРОСТАТИЧЕСКИЙ РУЛЕВОЙ МЕХАНИЗМ ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU2003110685A
Принадлежит:

... 1. Гидростатический рулевой механизм транспортного средства, содержащий дозирующий насос, соединенный с распределителем, в центральном отверстии корпуса которого размещены концентрично и с возможностью вращения друг относительно друга внешний и внутренний золотниковые элементы, один из которых жестко соединен с ротором дозирующего насоса, а другой золотниковый элемент жестко соединен с приводным валом, управляющие каналы, выполненные в корпусе и соединенные с камерами дозирующего насоса, продлены до соответствующей поверхности внешнего золотникового элемента, с образованием первого ряда отверстий, а на золотниковом элементе выполнен второй ряд отверстий, образующий с первым рядом отверствий распределительное соединение, причем в золотниковых элементах и корпусе выполнены отверстия и канавки для гидравлического соединения с полостями гидроцилиндра управления, с напорной и сливной магистралями, отличающийся тем, что в управляющих каналах соединенных с камерами дозирующего насоса и образующих ...

Подробнее
10-07-1999 дата публикации

РУЛЕВОЕ УПРАВЛЕНИЕ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU97115969A
Принадлежит:

Рулевое управление колесного транспортного средства, содержащее рулевое колесо, кинематически связанное с рулевым механизмом типа винт-шариковая гайка-рейка-зубчатый сектор, кинематически связанным с рулевым приводом, насос гидравлического усилителя, гидравлически связанный с баком, трехпозиционным четырехлинейным распределителем, кинематически связанным через реактивные плунжеры и центрирующие пружины с рулевой передачей винт-шариковая гайка и гидравлически связанным с насосом, баком и силовым цилиндром, поршнем которого является рейка рулевого механизма, отличающееся тем, что оно дополнительно снабжено перепускным клапаном, управляемым давлением рабочей жидкости, датчиком давления рабочей жидкости с сигнальной лампой отключения реактивных плунжеров, при этом перепускной клапан гидравлически соединен с одной стороны с насосом, а с другой стороны с полостью между реактивными плунжерами, датчик давления рабочей жидкости гидравлически соединен с насосом и электрически с сигнальной лампой ...

Подробнее
27-11-2000 дата публикации

РУЛЕВОЙ МЕХАНИЗМ ТРАНСПОРТНОГО СРЕДСТВА СО ВСТРОЕННЫМ УСИЛИТЕЛЕМ

Номер: RU99103464A
Принадлежит:

... 1. Рулевой механизм транспортного средства со встроенным усилителем, содержащий корпус, камеру, поршень с зубчатой рейкой, входящий в зацепление с зубчатым сектором, размещенным на валу, установленным в эксцентрических втулках, сопряженных с внутренней цилиндрической поверхностью корпуса и закрепленных посредством упорных и фиксирующих элементов, отличающийся тем, что упорные элементы размещены в местах сопряжения эксцентрических втулок с внутренней цилиндрической поверхностью корпуса. 2. Рулевой механизм по п.1, отличающийся тем, что упорные элементы выполнены в виде закладных проволок, размещенных в канавках одинакового профиля, оппозитно расположенных на наружных поверхностях эксцентрических втулок и на внутренней цилиндрической поверхности корпуса.

Подробнее
10-08-2014 дата публикации

ГИДРАВЛИЧЕСКАЯ СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА НА ГУСЕНИЧНОМ ХОДУ

Номер: RU2013104065A
Принадлежит:

... 1. Гидравлическая система рулевого управления транспортного средства на гусеничном ходу, содержащая маслостанцию с напорной и сливной гидромагистралями, насос-дозатор, кинематически связанный с рулевым колесом, гидравлически соединенный с напорной и сливной гидромагистралями, и гидролиниями через нормально закрытые трехлинейные двухпозиционные гидрораспределители - со штоковыми полостями гидроцилиндров управления фрикционными передачами, поршневые полости которых гидролиниями через нормально открытые трехлинейные двухпозиционные гидрораспределители соединены с напорной гидромагистралью маслостанции, а также тормозные гидроцилиндры с подпружиненным в сторону выключения тормоза поршнем, отличающаяся тем, что тормозные гидроцилиндры соединены с гидроцилиндрами управления фрикционными передачами дополнительными гидролиниями через дополнительные нормально закрытые трехлинейные двухпозиционные гидрораспределители посредством дополнительных отверстий, выполненных в гидроцилиндрах управления фрикционными ...

Подробнее
20-01-1998 дата публикации

ГИДРАВЛИЧЕСКАЯ СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU96110859A
Принадлежит:

Гидравлическая система рулевого управления колесного транспортного средства, содержащая насос, связанный гидролиниями непосредственно с баком, а с силовым цилиндром - посредством двух трехпозиционных четырехлинейных распределителей, один из которых кинематически связан с рулевым колесом, силовым цилиндром, и управляемыми колесами, а другой - линией управления - с датчиком положения управляемых колес, причем оба распределителя гидравлически связаны с рабочими полостями силового цилиндра посредством двух двухпозиционных трехлинейных распределителей, связанных линиями управления с датчиком момента на рулевом колесе, а с насосом и баком - посредством третьего двухпозиционного трехлинейного распределителя, связанного линией управления с датчиком момента на рулевом колесе, и регулятора расхода рабочей жидкости, связанного линией управления с датчиком скорости, отличающаяся тем, что трехпозиционный распределитель, связанный линией управления с датчиком положения управляемых колес, гидравлически ...

Подробнее
20-04-1998 дата публикации

РУЛЕВОЕ УПРАВЛЕНИЕ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА

Номер: RU96104967A
Принадлежит:

Рулевое управление колесного транспортного средства, содержащее рулевой привод и рулевой усилитель передних управляемых колес, кинематически связанные с рулевым колесом через рулевой механизм, а посредством муфты переменной длины, ведомое звено которой оснащено устройством возврата задних управляемых колес в нейтральное положение, - с рулевым приводом и рулевым усилителем задних управляемых колес, отличающееся тем, что оно дополнительно снабжено делителем потока, двухпозиционным распределителем, управляемым датчиком скорости и дросселем, а муфта переменной длины выполнена в виде силового цилиндра, имеющего в корпусе два дополнительных отверстия, открытых при нейтральном положении поршня и одном закрытом при смещении поршня, при этом подводящая линия делителя потока связана с насосом, а отводящие через двухпозиционный распределитель - с полостями муфты переменной длины, два дополнительных отверстия которой соединены между собой и посредством дросселя с баком, причем двухпозиционный распределитель ...

Подробнее
23-12-1991 дата публикации

Гидросистема рулевого управления транспортного средства

Номер: SU1699847A2
Принадлежит:

Изобретение относится к транспортному машиностроению, а именно к системам рулевого управления транспортных средств. Цель изобретения - повышение надежности системы в работе. Гидросистема содержит гидронасос, обратимую гидромашину 7, шесть обратных клапанов 11, 12, 13. 14, 20 и 21, гидрозамок 22 и подпиточные клапаны 23 м 24. При любом направлении движения транспортного средства к гидравлическому рулевому механизму 9 будет подаваться относительно постоянный расход рабочей жидкости, определяемый последовательным соединением насоса 1 и гидромашины 7. При обрыве гядролиний подвода к гидромашине 7 гидрозамок 22 изолирует насос 1 от поврежденной линии, обеспечивая сохранение работоспособности системы. 1 ил.

Подробнее
28-02-1991 дата публикации

Центробежный насос

Номер: SU1631201A1
Принадлежит:

Изобретение относится к насосострое- нию и предназначено для снижения энергозатрат при пуске и расширение диапазона регулирования центробежного насоса Колесо снабжено кольцевыми затворами 20 и 21 с электромагнитными приводами 22 и 23. При пуске насоса затворами 20 и 21 закрывается правый канал колеса 8, при этом снижается в два раза подача, а следовательно, и пусковые токи. Для увеличения подачи затворы 20 и 21 открываются, а задвижка 24 устанавливается по оси входного патрубка 2. Задвижку 24 и затвор 21 выполняют перфорированными для обеспечения выравнивания давлений в каналах 3, 4 и 5, 6 и колесе по обе стороны ведущего диска 9, устраняя тем самым осевые силы. 1 ил.

Подробнее
30-12-1986 дата публикации

Усилитель потока системы рулевого управления транспортного средства

Номер: SU1279897A1
Принадлежит:

... 1.УСИЛИТЕЛЬ ПОТОКА СИСТЕМЫ РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, включающей гидроруль, исполнительный гидроцилиндр, напорную и сливную гидролинии, содержащий управляющий, усилительный и регулирующий дроссели, и гидроуправляемое золотниковое распределительное устройство, выполненное с возможностью соединения в нейтральной позиции его линий управления с линиями управления гидроруля, а в каждой из рабочих позиций - напорной гидролинии через регулирующий дроссель с входом усилительного дросселя, выход которого соединен с одной из полостей исполнительного гидроцилиндра и через управляющий дроссель - с одной из линий управления гидроруля и с одной из линий управления золотникового распределительного устройства, другая полость исполнительного гидроцилиндра соединена со сливной гидролинией,а упомянутые управляющий, усилительный и регулирующий дроссели установлены в золотнике ргаспределительного устройства с возможностью изменения их проходных сечений по ходу золотника, отличающийся тем, что ...

Подробнее
30-08-1985 дата публикации

Гидравлическая система транспортного средства

Номер: SU1175780A1
Принадлежит:

ГИДРАВЛИЧЕСКАЯ СИСТЕМА ТРАНСПОРТНОГО СРЕДСТВА, содержащая источник давления жидкости, гидроусилитель рулевого управления с открытым центром, гидроусилитель тормозов с закрытым центром, гидроаккумулятор, обратный клапан и делитель потока, состоящий из корпуса, в отверстии которого размещены установленные с возможностью взаимодействия друг с другом подпружиненный золотник и плунжер, полость, образованная корпусом и торцом золотника со стороны пружины , гидравлически соединена с источником давления, полость, образованная корпусом и торцем плунжера,- с гидроаккумулятором и с гидроусилителем тормозов, полость, образованная корпусом и торца :и взаимодействующих золотника и плунжера ,- с гидробаком, а гидроусилитель рулевого управления гидравлически соединен с делителем потока с возможностью подсоединения его к источнику давления в одном из положений золотника, отличающаяся тем, что, с целью повыщения надежности ее работы , в золотнике и плунжере выполнены центральные сквозные отверстия, обратный ...

Подробнее
23-03-1985 дата публикации

Гидросистема рулевого управления колесного транспортного средства

Номер: SU1146227A1
Принадлежит:

ГИДРОСИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ КОЛЕСНОГО ТРАНСПОРТНОГО СРЕДСТВА, содержащая насосдозатор , кинематически связанйый с рулевым колесом и гидравлически соединенный гидролиниями с гидробаком, с электроги дравлическим гидрораспределителем автоматического управления и с переключающим золотниковым гидроуправляемым гидрораспределителем , гидравлически соединенным с электрогидравлическим гидрораспределителем автоматического управления и с гидроцилиндром механизма поворота, причем электролидравлический гидрораспределитель гидравлически дополнительно соединен посредством напорной гидролинии через дроссель с гидронасосом, отличающаяся тем, что, с целью повыщения надеЯсности и улучшения удобства управления, она снабжена двухпозиционным трехлинейным гидроуправляемым гидрораспределителем с подпружиненным золотником, одна из линий управления которого, объединенная с первой его линией, соединена с гидробаком, другая линия управления,, расположенная со стороны, противоположной действию пружины , соединена ...

Подробнее
07-10-1987 дата публикации

Гидравлическая система рулевого управления транспортного средства

Номер: SU1342803A1
Принадлежит:

Изобретение может быть использовано в транспортном машиностроении, а именно в системах рулевого управления транспортных средств, в сливных гидролиниях (ГЛ) которых последовательно гидравлическому рулевому механизму установлен гидромотор (ГМ), соединенный, например, с вентилятором . Цель изобретения - повышение эффективности работы системы за счет уменьшения сопротивления в сливной гидролинии во время работы гидрав- ,, лического рулевого механизма. Система содержит гидравлический рулевой механизм 1, соединенный напорной ГЛ 2 с гидронасосом 3 и сливной ГЛ 4 с ГМ 5 и рабочими ГЛ 9 и 10 - с исполнительным гидроцилиндром. Система снабжена ГЛ 13, присоединенной параллельно ГМ 5, в которой установлен напорный клапан 14, обеспечивающий поддержание на его входе заданного давления . Клапан 14 соединен дополнительной ГЛ управления 15 с напорной ГЛ 2. При повороте рулевого колеса гидрорулевого управления в рабочих ГЛ 9 и 10 и напорной ГЛ 2 появляются потоки жидкости с определенным давле нием. При превышении ...

Подробнее
07-10-1987 дата публикации

Гидравлический рулевой механизм транспортного средства

Номер: SU1342800A1
Принадлежит:

Изобретение относится к гидравлическому рулевому управлению транспортных средств. Цель изобретения состоит в расширении области применения рулевого механизма путем возможности его установки на машины различной мощности. Гидравлический усили5 Ю 6 (/) /1 ...

Подробнее
23-05-1988 дата публикации

Регулятор расхода системы рулевого управления транспортного средства

Номер: SU1397348A1
Принадлежит:

Изобретение относится к рулевому управлению транспортных средств, а именно к элементам его гидропривода , и может быть использовано в объемных гидроприводах рулевого управления наземных транспортных средств. Цель изобретения - улучшение работы регулятора путем обеспечения расхода в зависимости от скорости движения транспортного средства. Регулятор содержит корпус 1, в котором установлена гильза 2 с золотником 10, перепускной клапан 13 и электромагнитный клапан с запорным элементом 6. Последний электрически связан с датчиком 8 скорости движения транспортного средства. При заданной скорости движения запорный элемент 6 открывается, уменьшая перепад давления в отверстии 5, а следовательно, увеличивая расход рабочей жидкости на слив. 1 ил. о (Л со со со 4 СХ) « ю м JS S ...

Подробнее
23-06-1985 дата публикации

Гидравлический рулевой механизм транспортного средства

Номер: SU1162656A1
Принадлежит:

I. ГИДРАВЛИЧЕСКИЙ РУЛЕВОЙ МЕХАНИЗМ ТРАНСПОРТНОГОСРЕДСТВА , содержащий корпус с размещенным в нем рулевым валом, н-а котором выполнены винтовые канавки с расположенным в них пальцем, посредство.м которого рулевой вал кинематически связан с золотником распределителя рулевого механизма и с гидромоторсм обратной связи. и центрирующее устройство золотника, ки.чематически связанное с последним и включающее центрирующую пружину, установленную между двумя подвижными в осевом направлении упорными щайбами, отличающийся тем, что, с целью уменьшения габаритны.х размеров рулевого механизма и повыщения уровня унификации, кинематическая связь центрирующего устройства с золотником выполнена из штанги, один конец которой шарнирно соединен с пальцем , а другой - с центрирующим устройством , причем последнее установлено в центральном отверстии, выполненном в рулевом валу. 2. Механиз.м по п. 1, отличающийся тем, что, с целью повыщения точности работы рулевого механизма, конец nita ;:i: со стороны центрирующего ...

Подробнее
23-12-1992 дата публикации

COMBINED HYDRAULIC SYSTEM OF STEERING CONTROL AND AUXILIARY VEHICLE EQUIPMENT

Номер: RU1782838C
Автор:
Принадлежит:

Подробнее
15-11-1987 дата публикации

Распределитель гидравлического усилителя рулевого управления транспортного средства

Номер: SU1351826A1
Принадлежит:

Изобретение относится к транспортному машиностроению. Цель изобретения - повышение чувствительности распределителя. В распределителе между упорным подшипником 8 и корпусом 1 распределителя установлены рычаги 10, опирающиеся вторым концом на золотник 2 и преобразующие осевой ход рулевого винта 7 в увеличенный ход золотника . Выбором плеч рычагов получают требуемую чувствительность рас- пределителя. 1 з.п. ф-лы, 3 ил. (Л Ю 1 оо СП 00 Ю а ...

Подробнее
15-01-1985 дата публикации

Система рулевого управления транспортного средства

Номер: SU1134452A1
Принадлежит:

... 1. СИСТЕМА РУЛЕВОГО У ПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, содержащая гидравлический рулевой механизм , гидравлически соединенный напорной гидролинией через обратный клапан с гидронасосом рулевого управления, сливной гидролинией рулевого управления - с гидробаком и рабочими гидролиниями - с исполнительным гидроцилиндром поворота, дополнительный источник энергии, в качестве которого использованы гидромотор-насосы гидростатической трансмиссии транспортного средства, соединенные через гидрораспределитель с гидронасосом трансмиссии и посредством сливной гидролинии трансмиссии - с гидробаком, двухпозиционный гидравлически управляемый гидрораспределитель , соединенный с напорной гидролинией между обратным клапаном и гидравлическим рулевым механизмом и с выходом клапана ИЛИ, входы которого соединены с соответствующими полостями гидромоторанасосов , а линия управления двухпозиционного гидравлически управляемого гидрораспределителя гидравлически соединена с напорной гидролинией между гидронасосом рулевого ...

Подробнее
07-01-1985 дата публикации

Система рулевого управления транспортного средства

Номер: SU1133157A1
Принадлежит:

... 1. СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, содержащая гидрораспределитель рулевого управления, гидравлически соединенный с гидронасосом, с гидробаком и исполнительным гидроцилиндром поворота , механически соединенным с секциями ыарнирно сочлененного транспортного средства, рулевое колесо, кинематически связанное с датчиком поворота рулевого колеса, и датчик поворота секций шарнирно сочлененного транспортного средства, отличающаяся тем, что, с целью улучшения качества управления за счет увеличения быстродействия системы, она снабжена блоком управления , состоящим из двух инверторов; трех логических элементов НЕ, двух сумматоров, трех схем сравнения, четырех логических элементов И к двух логических элементов ИЛИ, гидрораспределитель рулевого управления выполнен электроуправляемым, а датчики поворота рулевого колеса и секций шарнирно сочлененного транспортного средства.- в виде потенциометров , при этом выход одного потен-. циометра датчика поворота рулевого колеса соединен с входом ...

Подробнее
23-12-1985 дата публикации

Система рулевого управления транспортного средства

Номер: SU1199690A1
Принадлежит:

СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, содержащая насос-дозатор, кинематически связанный с рулевым колесом и гидравлически соединенный со штоковыми полостями гидроцилиндров поворота и через обратные клапаны, установленные с возможностью перепуска рабочей жидкости к насосу-дозатору - с гидробаком, и основной насос, гидравлически соединенный с поршневыми полостями гидроцилиндров поворота и с гидробаком , отличающаяся тем, что, с целью повышения КПД системы за счет уменьшения потерь энергии, она снабжена блоком дифференциальных клапанов, механизмом реверса с фрикционными муфтами включения и дополнительным гидроцилиндром, шток которого механически связан с фрикционными муфтами включения механизма реверса, входной вал которого соединен с приводным двигателем, а выходной - с основным насосом , выполненным реверсивным с регулируемой подачей, блок дифференциальных клапанов состоит из корпуса, в отверстиях которого размещены два клапана, подпружиненные со стороны торца меньшего диаметра ...

Подробнее
15-11-1989 дата публикации

Система рулевого управления транспортного средства

Номер: SU1521650A1
Принадлежит:

Изобретение относится к транспортному машиностроению, в частности к системам рулевого управления транспортных средств, имеющих рабочий орган, перемещаемый в вертикальной плоскости. Цель изобретения - повышение безопасности работы в аварийном режиме за счет ограничения хода штока рабочего гидроцилиндра. Система рулевого управления транспортного средства, имеющего рабочий орган, перемещаемый в вертикальной плоскости и закрепленный в транспортном положении на гидроцилиндре 1, содержит гидравлический рулевой механизм 2 с исполнительным гидроцилиндром, гидравлически соединенный с насосом 3 и гидробаком. Для исключения возможности падения указанного рабочего органа на полотно дороги система рулевого управления снабжена дополнительным гидроцилиндром-ограничителем 4, двухпозиционным трехлинейным гидроуправляемым гидрораспределителем 5 и дополнительными гидролиниями 6,7,8,9. 1 ил.

Подробнее
15-11-1983 дата публикации

Система рулевого управления транспортного средства

Номер: SU1054169A1
Принадлежит:

... 1. СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, содержащая гидравлический рулевой механизм , связанный с рулевым колесом и посредством напорной гидролинии с гидронасосом , сливной - с гидробаком и двух рабочих гидролиний - со штоковой и поршневой полостями гидррцилиндра, отлича-. ющаяся тем, что, с целью повышения надежности путем обеспечения возможности аварийного режима работы, она снабжена дополнительным гидроцилиндром, трехлинейным двухпозиционным подпружиненным гидрораспределителем с гидролинией управления, дополнительным гидронасосом, установленным между гидронасосом и гидравлическим рулевым механизмом, и двумя обратными клапанами, один из которых установлен параллельно гидронасосу, а другой - параллельно дополнительному гидронасосу с возможностью перепуска рабочей жидкости по направлению от гидробака, причем входы гидрораспределителя сообщены с рабочим гидролиниями, а выход - с поршневой полостью дополнительного гидроцилиндра, штоковая полость которого сообщена с поршневой ...

Подробнее
30-07-1989 дата публикации

Рулевое управление транспортного средства со всеми управляемыми колесами

Номер: SU1497091A1
Принадлежит:

Изобретение относится к автомобильному транспорту и может быть использовано для оснащения машин высокой проходимости с регулируемой подвеской колес и большим вертикальным ходом колеса. Цель изобретения - повышение надежности работы. Рулевое управление содержит привод управляемых колес через червячные механизмы с зубчатыми секторами 30-33 на поворотной цапфе каждого управляемого колеса от гидродвигателей 22-25, каждый из которых приводится в действие от соответствующего насоса через золотники 34-37 гидроусилителей 18-21. При повороте рулевого колеса рабочая жидкость от насосов начинает поступать в гидродвигатели 22-25, которые через червяки 26-29 и зубчатые секторы 30-33 осуществляют поворот колес дифференциально в соответствии с углом поворота рулевого колеса. Каждое колесо поворачивается идти до тех пор, пока рычаги обратной связи через гибкие тяги не ставят золотники гидроусилителей в нейтральное положение. 1 ил.

Подробнее
30-07-1989 дата публикации

Гидравлический рулевой механизм транспортного средства

Номер: SU1497090A1
Принадлежит:

Изобретение относится к транспортному машиностроению. Цель изобретения - повышение точности работы рулевого механизма за счет увеличения его комплексного коэффициента усиления. Гидравлический рулевой механизм транспортного средства содержит гидрораспределитель 1 рулевого механизма, во внутреннем центральном отверстии золотника 2 которого установлена втулка 3 с внутренними шлицами 4 на одном своем конце, выполненная с возможностью осевого поворота относительно золотника 2 и кинематически связанная с одной стороны при помощи пальца 5 и наклонной направляющей 6 с рулевым валом 7, а с другой через полый шлицевой вал 8 с наружными шлицами 9 на двух его концах с внутренней шестерней 10, кинематически связанной с внешней шестерней 11, зафиксированной на корпусе 12 рулевого механизма. В центральном отверстии внутренней шестерни 10 закреплен подшипник 13, установленный с эксцентриситетом на конце вала 14 гидромотора 15 обратной связи. Нуль -установитель выполнен в виде верхней 16 и нижней 17 шайб ...

Подробнее
30-12-1984 дата публикации

Система рулевого управления транспортного средства

Номер: SU1131737A1
Принадлежит:

... 1. СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, содержащая гидроусилитель рулевого управления , гидрораспределитель которого гидравлически соединен с исполнительным гидроцилиндром, соединенным рычажной передачей, включающей в себя рулевую сеялку и рулевую трапецию, с управляемыми колесами, а также напорной гидролинией - с гидронасосом и сливной - с гидробаком, и двухпозиционный гидрораспределитель, установленный с возможностью соединения , wvwwn-fldTUv ,, . напорной и сливной гидролиний между собой в одной из его позиций, отличающаяся тем, что, с целью расширения функциональных возможностей системы путем обеспечения возможности комплектования систеАы гидроусилителями различных типоразмеров , она снабжена двумя концевыми выключателями, установленными с возможностью взаимодействия с подвижными элементами рычажной передачи при повороте управляемых колес в крайнее положение, а двухпозиционный гидрораспределитель выполнен с электро управлением и электрически соединен с упомянутыми концевыми ...

Подробнее
30-11-1984 дата публикации

Рулевой привод транспортного средства с двумя управляемыми мостами

Номер: SU1126482A1
Принадлежит:

РУЛЕВОЙ ПРИВОД ТРАНСПОРТНОГО СРЕДСТВА С ДВУМЯ УПРАВЛЯЕМЫМИ МОСТАМИ, содержащий связанные между собой рулевые трапеции передних и задних управляемых колес, механически соединенные с гидроцилиндрами поворота соответственно передних и задних колес, гидрораспределитель рулевого управления, кинематически связанный с рулевым колесом и гидравлически, соединенный с гидронасосом, с гидробаком и с гидроцилиндром поворота передних колес. и гидрораспределитель управления задними колесами, гидравлически соединенный с дополнительным гидронасосом и с гидробаком , отличающийся тем, что, с целью улучшения маневренности транспортного средства путем обеспечения возможности изменения направления поворота задних колес относительно передних, связь рулевых трапеций выполнена в виде трехплечего рычага, одно плечо которого соединено с рулевой трапецией передних управляемых колес, а два других - с рулевой трапецией задних управляемых колес посредством двух продольных тяг, в каждой из которых установлено по одному ...

Подробнее
23-06-1984 дата публикации

Гидросистема фронтального погрузчика

Номер: SU1098854A1
Принадлежит:

... 1. ГИДРОСИСТЕМА ФРОНТАЛЬНОГО ПОГРУЗЧИКА, включающая гидрораспределитель управления, гидравлически соединенный с гидронасосом, с гидробаком и посредством двух рабочих гидролиний с исполнительным гидроцилиндром и механически связанный с рукояткой управления , и гидромеханический фиксатор, отличающаяся тем, что, с целью расширения функциональных возможностей путем обеспечения автоматической остановки штока исполнительного гидроцилиндра при его перемеш.ении в любую сторону, гидромеханический фиксатор включает в себя корпус с размешенным в нем поршнем, имеюш,им fS в средней части кольцевую проточку и образующим с корпусом торцовые полости, шарики, размеш,енные в боковых отверстиях корпуса, имеющие возможность взаимодействия с поршнем при его перемещении, и перекрывающие указанные отверстия пластинчатые пружины, закрепленные одними концами на корпусе и оборудованные на свободных концах фиксирующими щеками для взаимодействия с органом управления гидрораспределителя, при этом торцовые полости гидромеханического ...

Подробнее
07-06-1992 дата публикации

Гидрообъемное рулевое управление колесного транспортного средства

Номер: SU1738688A1
Принадлежит:

Изобретение относится к транспортному машиностроению, может быть использо- вано в рулевых системах колесных тракторов, сельскохозяйственных и дорожных машин и обеспечивает снижение материалоемкости . Цель изобретения кий им. ков, упохоция М., АВОГО тноьзо- ных рожатея Ю снижение материалоемкости и улучшение работы гидрообъемного рулевого управления . Гидрообъемное рулевое управление колесного транспортного средства содержит корпус 1, вал 2,, гидрораспределитель рулевого механизма, усилитель потока, насос- дозатор 7, обратный клапан 6 и предохранительный клапан 30. Усилитель потока расположен в золотнике 3 гидрорас- поеделителя на одной оси с ним и валом 2 Насос-дозатор 7 связан гидравлически специальными каналами 9, 10 с усилителем потока , с другой стороны к усилителю потока подведены каналы для подвода рабочей жидкости, минуя гидрораспределитель, от напорной полости 23 через обратный клапан 6. В золотнике 5 усилителя потока выполнены по два канала 22. 24 и 23, 25 резного диаметра, связывающие ...

Подробнее
30-11-1983 дата публикации

Гидрораспределитель гидравлического усилителя рулевого управления транспортного средства

Номер: SU1057357A1
Принадлежит:

... 1. ГИДРОРАСПРЕДЕЛИТЕЛЬ ГИДРАВЛИЧЕСКОГО УСИЛИТЕЛЯ РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, содержащий корпус с выполненными в нем реактивными камерами, в которых расположены плунжеры, золотник, размещенный в продольном отверстии корпуса в упорных подшипниках, установленных во втулке, имеющей возможность взаимодействия с упомяну- . тыми плунжерами, и входной вал, кинематически связанный посредством резьбовой передачи с упомянутой втулкой и соединенный через торсион с рулевым валом, причем послед .НИИ выполнен шлицевым, кинематически связанным с упомянутой втулкой , отличающийся тем, что, с целью улучшения точности работы путем повышения чувсвительности усилителя рулевого управления , кинематическая связь рулевого вала с втулкой выполнена в виде кулачково-дисковой муфты, наружные выступы которой располагаются в-пазах, выполненных во втулке, а внутренние пазы муфты выполнены для .взаимодействия со шлицами рулевого вала, причем ширина по крайней мере двух пазов муфты равна, i а двух других ...

Подробнее
23-12-1990 дата публикации

Объединенная гидравлическая система рулевого управления и тормозов транспортного средства

Номер: SU1614828A1
Принадлежит:

Изобретение относится к транспортным средствам, в частности к гидросистеме тормоза и рулевого управления шахтного самоходного вагона. Целью изобретения является повышение надежности работы системы. Система содержит тормозные цилиндры 1, насос 2, тормозной кран 4, гидроруль 9, соединенный с насосом 2 и сливной линией - с гидробаком 11. В сливной линии установлен напорный клапан 12, линия управления которого соединена с напорной линией тормозов. При заряженном гидроаккумуляторе 15 напорный клапан 12 открыт, обеспечивая свободную разгрузку насоса 2 в гидробак 11, а при разрядке гидроаккумулятора клапан 12 перекрывается, обеспечивая подключение насоса 2 на его зарядку. 1 ил.

Подробнее
23-04-1984 дата публикации

Стенд для испытаний гидравлических рулевых механизмов

Номер: SU1087401A1
Принадлежит:

... 1. СТЕНД ДЛЯ ИСПЫТАНИЙ ГИДРАВЛИЧЕСКИХ РУЛЕВЫХ МЕХАНИЗМОВ , содержащий гидромотор привода редуктора, гидравлически соединенный посредством двух рабочих гидролиний с трехпозиционным четырехлинейным гидрораспределителем с электроуправлением и кинематически связанный через редуктор с подвижным элементом испытываемого гидроруля , гидравлически соединенного с гидронасосом , гидробаком и исполнительным гидромотором , и дополнительный гидронасос, гидравлически соединенный с трехпозиционным гидрораспределителем, отличающийся тем, что, с целью повышения надежности и точности работы стенда путем исключения дополнительных динамических нагрузок, действующих на испытываемый гидроруль от упомянутого гидромотора в крайних положениях подвижного элемента испытываемого гидроруля, он снабжен двумя дополнительными гидролиниями, подсоединенными параллельно гидромотору привода редуктора , с установленными в каждой из них поледовательно по одному обратному гидроклапану и двухпозиционному двухлинейному гидроуправляемому ...

Подробнее
23-12-1990 дата публикации

Устройство управления охлаждением гидросистемы транспортного средства

Номер: SU1614830A1
Принадлежит:

Изобретение относится к транспортному машиностроению, в частности к системам управления охлаждением рабочей жидкости гидросистем строительных и дорожных машин. Цель изобретения - повышение надежности и эффективности системы охлаждения. Устройство управления охлаждением гидросистемы транспортного средства снабжено датчиком 11 температуры, задатчиками верхнего 12 и нижнего 13 пределов температуры, электроуправляемым ключом 14, элементом 15 сравнения и усилителя 16. При достижении температуры рабочей жидкости верхнего предела на выходе 21 проходит электрический сигнал "I", который через вход 20 усилителя 16 и выход 18, по линии 19 управления поступает к ключу 14, соединяя последний с задатчиком 13 нижнего предела температуры, а через вход 17 - к гидрораспределителю 9, заставляя последний занять положение, при котором рабочая жидкость от насоса 10 через вход 8 поступает к гидромотору 5 привода вентилятора 6, заставляя последний вращаться и охлаждать рабочую жидкость. 2 ил.

Подробнее
07-02-1990 дата публикации

Гидравлический рулевой механизм транспортного средства

Номер: SU1541101A1
Принадлежит:

Изобретение относится к транспортному машиностроению и может быть использовано при создании рулевых механизмов тихоходных транспортных средств. Цель изобретения - повышение надежности работы. Гидрораспределитель 3 кинематически связан с рулевым колесом 1 и гидромотором 6 обратной связи и гидравлически соединен с насосом 7, гидробаком 8, исполнительным гидроцилиндром поворота 11, гидромотором 6 обратной связи и делителем потока 10. При повороте рулевого колеса гидрораспределитель 3 направляет основной поток, проходящий через делитель потока 10, в гидроцилиндр поворота 11, а поток управления направляет в гидромотор 6 обратной связи. Происходит поворот транспортного средства. 1 ил.

Подробнее
30-12-1983 дата публикации

Исполнительный механизм рулевого управления транспортного средства

Номер: SU1063677A1
Принадлежит:

ИСПОЛНИТЕЛЬНЫЙ МЕХАНИЗМ РУЛЕВОГО УПРАВЛЕНИЯ ТРАНСПОРТНОГО СРЕДСТВА, содержащий два гидроцилиндра , штоки которых кинематически связаны между собой и с поворотными колесамк транспортного средства, отлич ающийся тем, что, с целью улучшения управляемости и облегчения условий труда водителя, Кс1ждый из упомянутых гидроцилиндров снабжен предварительно сжатой пружиной , установленной между штоком и поршнем, а штоки гидроцилиндров выполнены подвижными в осевом направлении относительно поршней, причем ход поршня меньше хода штока, а усиI лие предварительного сжатил пружины больше УСИЛИЯ, требуемого на пово (Л рот колес транспортного средства . с :лр а: ...

Подробнее
23-04-1990 дата публикации

Рулевое управление транспортного средства

Номер: SU1558757A1
Принадлежит:

Изобретение относится к машиностроению и может быть использовано для управления тихоходными транспортными средствами, например погрузчиками-экскаваторами. Цель изобретения - улучшение управляемости и повышение надежности. Рулевое управление содержит блок 1 управления, насосы-дозаторы 2 и 12, кинематически связанные с рулевым колесом 3, гидравлически - с гидродвигателями 4 и 16 и через обратные клапаны 5,6,14,15 - с насосом 7. Гидродвигатели 4 взаимодействуют с дроссельными гидрораспределителями 8 и 17, корпуса которых кинематически связаны с гидроцилиндрами 9 и 18 поворота колес 10 и 11, 19 и 20 переднего и заднего мостов. В гидролинии насос-дозатор 12 - гидродвигатель 16 установлен трехпозиционный четырехлинейный гидрораспределитель снабжен фиксатором и датчиком среднего положения колес 19 и 20. Фиксатор выполнен в виде подпружиненного гидроцилиндра 21, взаимодействующего роликом 23 с пазом 24 гидродвигателя 16. Гидроцилиндр через двухпозиционный трехлинейных гидрораспределитель 25 соединен ...

Подробнее
23-06-1983 дата публикации

Трактор

Номер: SU1024025A1
Принадлежит:

ТРАКТОР, содержащий тандемколёса , расположенные на концах балансиров с возможностью качания относительно ведущей осй, роликовые цепи , соединенные со звездочкаили тандем-колес и ведущей оси, тормозной кран, гидравлически соединенный через трехпозиционный разобщительный кран с левой и правой ра6очю4и камерами тормозов, навесную систему рабочего оборудования, шарнирно соединенную с рамой трактора с возможностью подъема силовым гидроцилиндром, гидравлически соединенным через гидрораспределитель с гидронасосом и с гидробаком , между которыми установлен редукционный клапан, отличаю щ и и с я тем, что с целью снижения затрачиваемой мощности на поворот трактора по малому радиусу и улучшения маневренности, он снабжен двумя дополнительными силовыми гидроцилинд-л рами, расположенными по обе стороны ,« рамы трактора, штоки которых механи- -чески связаны с балансирами, а шток о-( вые полости гидравлически соединены с линией управления гидрораспределйтеля , выполненного гидроУправляемым, Q и через ...

Подробнее
07-02-1988 дата публикации

Гидросистема рулевого управления транспортного средства

Номер: SU1371938A2
Принадлежит:

Изобретение относится к системам рулевого управления транспортноJ-i го средства. Цель изобретения - улучшение управляемости транспортного средства при движении как передним, так и задним ходом. Гидросистема рулевого управления транспортного средства содержит гидронасос 1, обратимую гидромашину 7, шесть обратных клапанов II, 12, 16, 17, 20, 21 и соединительные гидролинии. При любом направлении движения транспортного средства к гидравлическому рулевому механизму 9 будет подаваться относительно постоянный расход рабочей жидкости, определяемый последовательным соединением гидронасоса 1 и гидромашины 7. 3 ил. 23 (Л 00 N3 yz.1 ...

Подробнее
23-02-1992 дата публикации

Гидравлический рулевой механизм транспортного средства

Номер: SU1713847A1
Принадлежит:

Изобретение относится к транспортному машиностроению, а именно к системам рулевого управления транспортных средств. Цель изобретения - повышение надежности работы рулевого механизма. ГидГ'равлический рулевой механизм содержит корпус 1 гидрораспределителя 2с гйдромо- тором 3 обратной связи с линиями 4-7 для гидравлического соединения с насосом 8. гидробаком 9, исполнительным гидроцилиндром 10, предохранительный клапан 11, подпиточные клапаны 12 и 13, входы которых соединены со сливной линией 5, а их выходы - с соответствующими линиями 6 и 7 для соединения с полостями исполнительного гидроцилиндра 10, обратный клапан 14 и последовательно соединенные дополнительные обратные клапаны 16 и 17 с дросселями 18 и 19, соединяющие соответствующие линии 6 и 7 для соединения с исполнительным гидроцилиндром 10 с входом 15 предохранительного клапана 11.1 ил.ч»—о-^соС-2 ...

Подробнее
07-02-1992 дата публикации

Система рулевого управления транспортного средства

Номер: SU1710420A1
Принадлежит:

Изобретение относится к системам рулевого управления транспортных средств. Цель изобретения - улучшение управляемости. Система содержит насос 1, предохранительный клапан 2, гидробак 3, устройство 4 ручного управления, содержащее гидравлический рулевой механизм (ГРМ) 5, распределительное устройство которого механически связано с рулевым колесом 6, а также усилитель 1 потока, гидроуправляе- мый напорный клапан 8, четырехлинейный электрогидравлический усилитель 9 пропорционального действия, напорная гидролиния которого соединена с выходом насоса, клапан ИЛИ 10, гидрозамок 11, гидроцилиндр 12 поворота, датчики траектории движения 13, положения штока гидроцилиндра поворота 14, крена 15 и усилитель 16. Для улучшения показателей качества регулирования автомата вождения выходы гидрозамка дополнительно сообщены гидролиниями 27 и 28 с полостями гидроцилиндра 12 поворота. Для обеспечения коррекции траектории движения в режиме автоматического вождения за счет поворота рулевого колеса рабочие гидролинии ...

Подробнее
30-07-1984 дата публикации

Гидравлическая система транспортного средства с гидрообъемной трансмиссией

Номер: SU1105357A1
Принадлежит:

ГИДРАВЛИЧЕСКАЯ СИСТЕМА ТРАНСПОРТНОГО СРЕДСТВА С ГИДРООБЪЕМНОЙ ТРАНСМИССИЕЙ, содержащая гидравлический рулевой механизм, гидравлически соединенный своей напорной гид ролинией с гидронасосом рулевого управления , сливной гидролинией - с гидробаком и рабочими гидролиниями - с исполнительным гидроцилиндром поворота колес, гидромотор привода колес, рабочие гидролинии которого соединены между собой через два предохранительных клапана, установленных параллельно с возможностью перепуска рабочей жидкости во встречных направлениях между рабочими гидролиниями, которые через многопозиционный гидрораспределитель соединен с гидронасосом привода колес и посредством отходящей от многопозиционного гидрораспределителя сливной гидролинии - с гидробаком, регулятор потока , включающий дроссель, установленный в напорной гидролинии рулевого механизма между последним и обратным клапанами. и напорный гидроклапан, связывающий участок указанной напорной гидролинии между дросселем и обратным гидроклапаном с рабочей ...

Подробнее
23-03-1984 дата публикации

Двухконтурное гидравлическое рулевое управление транспортного средства

Номер: SU1081053A1
Принадлежит:

ДВУХКОНТУРНОЕ ГИДРАВЛИЧЕCKOfe РУЛЕВОЕ УПРАВЛЕНИЕ ТРАНСПОРТНОГО СРЕДСТВА, содержащее гидравлический рулевой механизм, золотник которого кинематически связан с рулевым колесом и гидромотором обратной и гидравлически соединен при помощи напорной гидролинии с гидронасосом , а также с гидробаком ц с гидроуправляемым гидрораспределителем, который гидравлически соединен с исполнительным гидроцилиндром поворота и с гидронасосом, двухпозиционный двухлинейный гидроуправляемый гидрораспределитель и дроссель, отличающееся тем, что, с целью повы1иения надежности работы,, оно снабжено делителем потока, установленным в напорной гидролинии гидронасоса , первый выход которого соединен с гидравлическим рулевым механизмом , а второй - с гидроуправляемым распределителем, двумя подпружиненвадми обратными клапанами аварийного включения, установленными между обеими полостями управления гидроуправляемого гидрораспределителя и вторым выходом делителя потока с возможностью перепуска рабочей жидffi кости и вторым ...

Подробнее
30-09-1984 дата публикации

Система рулевого управления транспортного средства

Номер: SU1115957A1
Принадлежит:

СИСТЕМА РУЛЕВОГО УПРАВЛЕНИЯ , ТРАНСПОРТНОГО СРЕДСТВА, содержащая I гидронасос, гидравлически соединенный с делителем потока, гидробак и гидрораспределитель рулевого управления, включающий в себя размещенный в корпусе золотник, кинематически связанный с рулевым колесом, при этом гидрораспределитель рулевого управления посредством рабочих гидролиний гидравлически соединен с исполнительным гидроцилиндром, кинематически связанным с управляемыми колесами, и посредством сливных гидролиний с гидробаком, отличающаяся тем, что, с целью повышения маневрен ности транспортного средства путем улучшения.чувствительности системы, делитель потока гидравлически соединен с полостями исполнительного гидроцилиндра , а золотник гидрораспрег делителя рулевого управления выполнен с двумя коническими концевыми частями для возможности частичного, перекрытия рабочих гидролиний.

Подробнее
15-04-1984 дата публикации

Гидравлическая система транспортного средства с гидрообъемной трансмиссией

Номер: SU1085860A1
Принадлежит:

ГИДРАВЛИЧЕСКАЯ СИСТЕМА ТРАНСПОРТНОГО СРЕДСТВА С ГИДРООБЪЕМНОЙ ТРАНСМИССИЕЙ, содержащая гидравлический рулевой механизм, гидравлически соединенный напорной гидролинией с гидронасосом рулевого механизма, сливной гидролинией - с гидробаком и рабочими гидролиниями - с исполнительным гидроцилиндром поворота колес, гидромотор привода колес, рабочие гидролинии которого соединены между собой через два предохранительных клапана, установленных параллельно с возможностью перепуска рабочей жидкости во встречных направлениях между рабочими гидролиниями, которые через многопозиционный гидрорас пределитель соединены с гидронасосом привода колес и посредством отходящей от многопозиционного гидрораспределителя сливной гидролинии с гидробаком , отличающаяся тем, что, с целью улучшения управляемости транспортного средства, а также обеспечения возможности.его управления при остановке гидронасосов рулевого механизма и привода колес, она снабжена обратным гидроклапаном, установленным в напорной гидролинии рулевого ...

Подробнее
30-11-1984 дата публикации

Гидравлический рулевой механизм транспортного средства

Номер: SU1126481A1
Принадлежит:

ГИДРАВЛИЧЕСКИЙ РУЛЕВОЙ МЕХАНИЗМ ТРАНСПОРТНОГО СРЕДСТ- . ВА, содержащий размещенный в корпусе гидрораспределитель рулевого механизма с золотником, соединенным одним концом с обоймой, в проточке которой установлен подшипник с закрепленным в нем червяком , кинематически соединенным с гидромотором обратной связи, причем в корпусе выполнены отверстия для соединения гидрораспределителя рулевого механизма с гидронасосом, гидробаками, гидромотором обратной связи и исполнительным гидроцилиндром , а червяк кинематически связан через червячное колесо с рулевым валом, отличающийся тем, что, с целью повышения надежности путем обеспечения возможности работы гидравлического рулевого механизма при выходе из строя гидронасоса и улучшения его выходных характеристик, он снабжен прифланцованным к корпусу блоком аварийного управления, состоящим из двухпозиционногЬ двухлинейного гидроуправляемого гидрораспределителя и трехпозиционного трехлинейного гидрораспределителя, золотник которого смещен относительно продольной ...

Подробнее
15-09-1984 дата публикации

Гидравлическое рулевое управление транспортного средства и его варианты

Номер: SU1114328A3

... 1. Гидравлическое рулевое управление транспортного средства, содержащее рулевой вал, связанный по меньшей мере с одним гидроцилиндром, имеющим две рабочие полости, разделенные .поршнем, и по меньшей мере один напорный гндроклапан, соединяющий напорную гидролинию со сливной и состоящий из запорного злемента и пружины сжатия, о. т-личающее ся тем, что, с целью повышения надежности работы, напорный -идроклапан снабжен толкателем , расположенным со стороны, противоположной запорному злементу, с возможностью взаимодействия одним торцом с пружиной сжатия, а другим, выступающим в соответствующую рабочую полость гидроцилиндра, с внутренней торцовой поверхностью гидроцилиндра в каждом крайнем положении поршня гидроцилиндра.

Подробнее
03-05-1990 дата публикации

MEHRFACHUMDREHUNGSWELLEN-POSITIONSSENSOR MIT SPIELKOMPENSATION

Номер: DE0003935261A1
Принадлежит:

Подробнее
05-02-1981 дата публикации

HYDRAULISCH UNTERSTUETZTE LENKEINRICHTUNG

Номер: DE0002930048A1
Принадлежит:

Подробнее
30-04-2009 дата публикации

Nutzfahrzeuglenkung

Номер: DE202004021588U1
Автор:
Принадлежит: MAN NUTZFAHRZEUGE AG

Подробнее
21-01-1999 дата публикации

Pressure pump for motor vehicle power steering

Номер: DE0019745448C1

The pump has a casing (1) with a rotor (3) and a ring (4) with a drive plate (5). The latter define working chambers with control plates (8,9) and a by-pass flow control valve (11) with a piston (11A) for regulation of a working stream. The throttle of the valve has a shutter (12) with a cross sectional face increased with a rise in the shutter pressure. The piston is moved against a spring (15) through a pressure exerted on the shutter, so that the cross sectional surface of the shutter is dependent on the pressure variation.

Подробнее
18-02-1982 дата публикации

Номер: DE0002630615C3
Принадлежит: RIVA CALZONI S.P.A., MILANO, IT

Подробнее
31-10-1973 дата публикации

ANORDNUNG ZUR LENKKRAFTBEGRENZUNG

Номер: DE0002221232A1
Принадлежит:

Подробнее
24-05-2012 дата публикации

Method for managing faults in a magneto-rheological hydraulic power steering system

Номер: US20120130594A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A system and method for managing faults occurring in a power steering system in a vehicle is disclosed that has particular application for an MRHPS system to provide reliable functioning of the power steering system. The method includes detecting a fault condition in the MRHPS system and selecting a safe mode from a plurality of predetermined safe modes based on the fault condition. The plurality of predetermined safe modes include a normal operation mode, an engine speed follow mode, a manual mode, a fixed duty cycle mode and a voltage control mode. If a fault condition is detected, the method applies the safe mode to manage the fault condition.

Подробнее
09-08-2012 дата публикации

Variable displacement pump

Номер: US20120199411A1
Принадлежит: Unisia JKC Steering Systems Co Ltd

A variable displacement pump includes a pumping part and a cam ring for supplying working fluid to a vehicle steering device. The cam ring is arranged radially outside of the pumping part, and configured to move along with a change in eccentricity of the cam ring, wherein the change in eccentricity causes a change in specific discharge rate. A solenoid is configured to control the eccentricity of the cam ring by being driven with an energizing current conformed to a control setpoint. A base setpoint is calculated based on steering angular speed and vehicle speed. The control setpoint is calculated based on the base setpoint and steering angular acceleration in a manner that the control setpoint increases more quickly than the base setpoint when the base setpoint increases in accordance with steering operation of the steering wheel.

Подробнее
18-10-2012 дата публикации

Hydraulic System for Construction Machinery

Номер: US20120261010A1
Автор: Jeung Hwa Kim
Принадлежит: Doosan Infracore Co Ltd

The present disclosure relates to a hydraulic system for construction machinery, which is applied to construction machinery provided with a steering unit for controlling steering of equipment, and a main control valve for controlling operating of a work tool, and includes: a main pump for discharging working fluid supplied to the steering unit and the main control valve; a load sensing pressure sensor for sensing a load sensing pressure of the steering unit; a priority valve installed in a supply passage for the working fluid discharged from the main pump, for dividing and supplying the working fluid discharged from the main pump to the steering unit and the main control valve, to correspond to the load sensing pressure; an auxiliary pump for supplementing working fluid to the supply passage supplying the working fluid divided by the priority valve to the steering unit; an electric motor for operating the auxiliary pump; and a controller for operating the electric motor when the load sensing pressure is greater than a reference load sensing pressure, and additionally supplying working fluid discharged from the auxiliary pump the steering unit.

Подробнее
20-06-2013 дата публикации

VEHICLE STEERING SYSTEM

Номер: US20130158806A1
Принадлежит: JTEKT CORPORATION

When a vehicle is quickly steered while the vehicle is travelling at an extremely low speed, a load on an in-vehicle power supply is reduced without deteriorating a steering feeling by reducing a motor driving current. A steering speed is compared with a threshold. When the steering speed is lower than the threshold, the process proceeds to step S In step S a voltage value of a battery power supply, which is used as a prescribed value, is set as a limit voltage in order to reduce a motor consumption current. When the steering speed is higher than the threshold, a value “V/n” lower than the prescribed value is set as the limit voltage to reduce a consumption current when the steering wheel is steered without driving. “n” is “delay adjustment parameter”, and is a real number that exceeds 1. 1. A vehicle steering system in which an electric motor for steering a wheel is mounted comprising:a limit value setting unit that determines whether a vehicle is stopped or travelling at an extremely low speed, and that, when it is determined that the vehicle is stopped or travelling at an extremely low speed, outputs a limit value for imposing limitation on electric power that is consumed by the electric motor on a condition that a steering speed at which a steering member is steered is higher than a predetermined threshold; anda command voltage control unit that outputs a control value for controlling the electric motor by using the limit value provided from the limit value setting unit.2. The vehicle steering system according to claim 1 , wherein the electric motor is a motor that is controlled through pulse width modulation claim 1 , and the control value for controlling the electric motor is a voltage value that is used to perform the pulse width modulation.3. The vehicle steering system according to claim 1 , wherein the predetermined threshold is 360 degrees per second in steering speed of the steering member. This application claims priority to Japanese Patent Application ...

Подробнее
27-06-2013 дата публикации

Hydraulic power steering system

Номер: US20130161113A1
Принадлежит: JTEKT Corp

When an ECU is powered on, an overall control unit determines whether a temperature detected by a temperature sensor is lower than or equal to a predetermined temperature. When it is determined that the detected temperature is lower than or equal to the predetermined temperature, the overall control unit provides a second operation start command for operating a valve driving motor control unit in a rotation direction alternately switching mode, to the valve driving motor control unit. When the valve driving motor control unit receives the second operation start command from the overall control unit, the valve driving motor control unit starts operating in the rotation direction alternately switching mode.

Подробнее
04-07-2013 дата публикации

STEERING SYSTEM FOR MOTOR-DRIVEN VEHICLE

Номер: US20130173119A1
Автор: Izawa Kazuyuki
Принадлежит: SUZUKI MOTOR CORPORATION

An object of the present invention is to provide a steering system for a motor-driven vehicle, which has steering operability equivalent to that of a vehicle mounted with a conventional internal combustion engine only, and has steering operability equivalent to an inherent one even during the time when fail-safe control of assist of steering force is carried out. To achieve this object, in the steering system for a motor-driven vehicle including a drive motor that is a power source for the motor-driven vehicle, a motor speed sensor for detecting the speed of the drive motor, a steering system for giving a steering angle to front wheels according to the steering angle of a steering wheel, a vehicle speed sensor for detecting the speed of the motor-driven vehicle, and a power steering controller that outputs an assist amount according to the steering of a passenger based on at least one of the output signals of the motor speed sensor and the vehicle speed sensor, as the speed of the motor-driven vehicle or the speed of the drive motor increases, the assist amount is made smaller. 1. A steering system for a motor-driven vehicle comprising a drive motor which is a power source for the motor-driven vehicle , a motor speed sensor for detecting the speed of the drive motor , a steering system for giving a steering angle to front wheels according to the steering angle of a steering wheel , a vehicle speed sensor for detecting the speed of the motor-driven vehicle , and a power steering controller which outputs an assist amount according to the steering of a passenger based on at least one of the output signals of the motor speed sensor and the vehicle speed sensor , characterized in that as the speed of the motor-driven vehicle or the speed of the drive motor increases , the assist amount is made smaller.2. The steering system for a motor-driven vehicle according to claim 1 , wherein the power steering controller sets a false engine speed having a value that becomes higher ...

Подробнее
11-07-2013 дата публикации

POWER STEERING SYSTEM FOR A VEHICLE

Номер: US20130175111A1
Принадлежит: Renault Trucks

In a vehicle including a traction engine designed to drive wheels through a driveline that includes an upstream portion which is connected to the engine and a downstream portion which is permanently connected to the drive wheels, the power steering system includes a hydraulic circuit including a fluid tank and a steering actuator. The power steering system further includes a first pump which is driven by mechanical power from the downstream portion of the driveline, and a second pump which is driven by an electric motor. The first and second pumps are arranged in parallel between the fluid tank and the steering actuator and are capable of supplying fluid from the fluid tank to the steering actuator at the same time. 1. A power steering system for a vehicle , the vehicle comprising a traction engine designed to drive wheels through a driveline comprising an upstream portion which is connected to the engine and a downstream portion which is permanently connected to the drive wheels , the power steering system comprisinga hydraulic circuit including a fluid tank and a steering actuator,a first pump which is driven by mechanical power from the downstream portion of the driveline; anda second pump which is driven by an electric motor;wherein the first and second pumps are arranged in parallel between the fluid tank and the steering actuator and are capable of supplying fluid from the fluid tank to the steering actuator at the same time.2. The power steering system according to claim 1 , wherein it further comprises an electronic control unit capable of controlling the electric motor which drives the second pump claim 1 , the electronic control unit being designed to make the second pump deliver a fluid flow claim 1 , at low vehicle speed claim 1 , which is high enough to compensate for the low fluid flow delivered by the first pump claim 1 , in order to ensure a sufficient fluid supply to the steering actuator.3. The power steering system according to claim 2 , wherein ...

Подробнее
29-08-2013 дата публикации

Motor controlling apparatus

Номер: US20130221886A1
Автор: Hitoshi Matsumoto
Принадлежит: Denso Ten Ltd

A motor controlling apparatus includes: a controller configured to (i) compute a target duty cycle value which is a target value for a duty cycle used for a pulse width modulation control for controlling a motor, and (ii) specify 100% as a duty cycle specified value when the target duty cycle value is greater than an upper limit value which is below 100%, or specify 0% as the duty cycle specified value when the target duty cycle value is less than a lower limit value which exceeds 0%; and a control signal generator that generates a control signal for controlling the motor at the duty cycle specified value specified by the controller.

Подробнее
12-12-2013 дата публикации

Filter with a bypass mechanism for a hydraulic system

Номер: US20130327689A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

A reservoir for a hydraulic system includes a housing having an inlet and an outlet. The inlet is adapted to receive an incoming fluid and is formed within an inlet tube that extends into the housing. A filter within the housing, includes a filter element, defining an inner filter chamber, and includes an inlet opening encompassing the inlet tube that extends into the housing. The inlet opening allows the incoming fluid to enter the inner filter chamber for filtration. A base wall around the inlet opening includes a guide step that guides a relative movement between the reservoir and the filter. A relative movement between the filter and the reservoir facilitates the base wall, the guide step, and the inlet tube, to co-operate and establish a bypass route for selectively allowing the incoming fluid to bypass the filter, depending upon a predetermined differential pressure between the inlet and the outlet.

Подробнее
16-01-2014 дата публикации

METHOD FOR SELECTIVELY CHARGING AND DISCHARGING A STEERING ACCUMULATOR

Номер: US20140013733A1
Принадлежит: CNH AMERICA LLC

A system and method for selectively charging and discharging a steering accumulator are provided. One vehicle steering system includes a hydraulic pump configured provide a source of pressurized hydraulic fluid for use in steering the vehicle. The steering system also includes an accumulator configured to hold pressurized hydraulic fluid from the pump for use in steering the vehicle in case of need. The steering system includes a charging circuit configured to selectively allow the hydraulic fluid to flow from the hydraulic pump to the accumulator based on a fluid pressure applied by a first pilot and a second pilot. The steering system includes a charging bypass circuit configured to allow the hydraulic fluid to flow to a steering control unit and to bypass the charging circuit. The hydraulic pump supplies fluid to the charging circuit and the bypass circuit. 1. A method for charging an accumulator of a vehicle steering system , the vehicle steering system including a hydraulic pump , the accumulator , an accumulator charging circuit , a bypass circuit , and a steering control unit , the hydraulic UMP supplying hydraulic fluid to the accumulator charging circuit and the bypass circuit , the method of charging an accumulator comprising:opening a charging valve of the accumulator charging circuit to allow hydraulic fluid to flow from a hydraulic pump to an accumulator;closing a hysteresis valve of the accumulator charging circuit when the hydraulic fluid in the accumulator reaches a first fluid pressure, wherein before the hysteresis valve is closed, hydraulic fluid flowing through the hysteresis valve applies pressure via a first pilot of the charging valve;closing the charging valve after the hysteresis valve is closed, wherein the charging valve is closed when the combined pressure applied by the first pilot and a spring drops below pressure applied by a second pilot of the charging valve; andopening the charging valve to allow hydraulic fluid to flow from the ...

Подробнее
06-02-2014 дата публикации

METHOD AND SYSTEM FOR THE DETERMINATION OF A STEERING ANGLE

Номер: US20140039753A1
Автор: Fraser Matthew, Smits Erik
Принадлежит: LEICA GEOSYSTEMS AG

A method and system are provided for determining the angle of steering of a vehicle, particularly an agricultural vehicle, by determining vehicle yaw rate, determining vehicle speed, determining hydraulic flow in a hydraulic steering assembly connected in parallel with a manual hydraulic steering circuit of the vehicle, and processing the yaw rate, speed, and hydraulic flow data to determine the angle of steering of the vehicle. 1. A method for determination of the angle of a steering of a vehicle , the method comprising the steps of:determining vehicle yaw rate;determining vehicle speed;determining hydraulic flow in a hydraulic steering assembly connected in parallel with a manual hydraulic steering circuit of the vehicle; andprocessing the yaw rate, speed, and hydraulic flow data to determine the angle of steering of the vehicle.2. The method of claim 1 , wherein the processing step comprises utilising the yaw rate and speed data to generate an absolute estimate of the steering angle.3. The method of claim 1 , wherein the processing step comprises utilising the hydraulic flow data to generate a relative estimate of the angle of steering.4. The method of claim 1 , further comprising the step of generating an initial estimate of the steering angle using determined yaw rate and speed of the vehicle.5. A method of determining the angle of steering of a vehicle for use in an automated steering system claim 1 , the method comprising the steps of:engaging the automated steering system; determining vehicle yaw rate;', 'determining vehicle speed; and', 'processing the yaw rate and speed of the vehicle to generate an initial absolute estimate of the angle of steering;', determining vehicle yaw rate;', 'determining vehicle speed;', 'determining hydraulic flow in a hydraulic steering assembly connected in parallel with a manual hydraulic steering circuit of the vehicle;', 'processing the yaw rate and speed data to refine the absolute estimate of the angle of steering;', ' ...

Подробнее
13-03-2014 дата публикации

HYBRID STEERING SYSTEM AND METHOD FOR CONTROLLING THE SAME

Номер: US20140074355A1
Автор: KIM Jong Min, Park Soo Bo
Принадлежит: HYUNDAI MOTOR COMPANY

A hybrid steering system and a method for controlling the same. A motor driving power steering (MDPS) module at the rear end of a steering wheel includes a first torsion bar connected to a steering wheel shaft, a first torque sensor for measuring the torque of the first torsion bar, and an MDPS motor for applying the torque to the steering wheel shaft. An electro-hydraulic power steering (EHPS) module at the rear end of the MDPS module includes a second torsion bar connected to the steering wheel shaft and a hydraulic mechanism for applying hydraulic steering power. A control unit controls both the torque of the MDPS motor and the steering power of the hydraulic mechanism depending on the speed or steering angle of a vehicle so that both powers from the MDPS motor and the hydraulic mechanism can be applied to the steering wheel shaft. 1. A hybrid steering system of a vehicle comprising:a motor driving power steering (MDPS) module disposed at a rear end of a steering wheel, wherein the MDPS module comprises a first torsion bar connected to a steering wheel shaft, a first torque sensor which measures a torque of the first torsion bar, and an MDPS motor which applies the torque to the steering wheel shaft;an electro-hydraulic power steering (EHPS) module disposed at a rear end of the MDPS module, wherein the EHPS module comprises a second torsion bar connected to the steering wheel shaft and a hydraulic mechanism which applies steering power using hydraulic pressure depending on the torsion of the second torsion bar; anda control unit, wherein the control unit controls both the torque of the MDPS motor and the steering power of the hydraulic mechanism depending on a speed or a steering angle of the vehicle so that both powers from the MDPS motor and the hydraulic mechanism can be applied to the steering wheel shaft.2. The hybrid steering system of claim 1 , wherein the control unit improves steering ability by increasing the steering power that is applied by the ...

Подробнее
06-01-2022 дата публикации

Hydraulic Parallel Work Systems

Номер: US20220001915A1
Автор: Bowden Charles
Принадлежит:

A system for hydraulic parallel work systems is provided. The system includes a fixed displacement pump (), a closed-center circuit (), an open-center hand metering unit (HMU) (), and a tank (). The closed-center circuit is in fluid communication with the fixed displacement pump. The open-center HMU is in fluid communication with the fixed displacement pump at an inlet port () of the HMU. The tank is fluidly connected to the inlet port of the HMU when the HMU is inactive. 1. A system comprising:a fixed displacement pump;a closed-center circuit in fluid communication with the fixed displacement pump;an open-center hand metering unit (HMU) in fluid communication with the fixed displacement pump at an inlet port of the HMU; anda tank fluidly connected to the inlet port of the HMU when the HMU is inactive.2. The system of claim 1 , wherein the closed-center circuit includes a steering valve and an enable valve claim 1 , the enable valve in fluid communication with the steering valve and including a first position and a second position claim 1 , the second position configured to provide fluid communication between the fixed displacement pump and the steering valve.3. The system of claim 2 , further comprising a modulating valve includingan input port in fluid communication with the fixed displacement pump, andan output port in fluid communication with the inlet port of the HMU.4. The system of claim 3 , wherein:the first position of the enable valve is a closed position;the input port of the modulating valve is fluidly connected to the fixed displacement pump; andthe output port of the modulating valve is fluidly connected to the inlet port of the HMU.5. The system of claim 3 , wherein:the first position of the enable valve is an open position including a first-position fluid connection between a supply input port and a tank port, the tank port in fluid communication with the inlet port of the HMU;the input port of the modulating valve is in parallel fluid communication ...

Подробнее
07-01-2021 дата публикации

HYDROSTATIC STEERING ARRANGEMENT

Номер: US20210001930A1
Автор: OGNIBENE Claudio
Принадлежит: OGNIBENE POWER S.P.A.

A steering arrangement for a vehicle includes: 1101. A steering arrangement () for a vehicle () comprising:{'b': 65', '80', '85', '70', '75', '95', '80', '85', '70', '90', '120', '125, 'a hydrostatic steering unit () provided with two work ports (,), a high-pressure port (), a low-pressure port (), a main branch of the flow () arranged between the work ports (,) and the high-pressure port () and comprising a dosing device (), and an amplification branch () arranged between the work ports and the high-pressure port, in parallel to the dosing device, and comprising a flow-rate regulating device () of the electrically actuated type,'}{'b': 60', '55', '65, 'a steering shaft () provided with a first end adapted for being connected to a steering member () and a second end adapted for being connected to the hydrostatic steering unit (),'}{'b': 185', '60, 'an electric motor () configured to set the steering shaft () in rotation, and'}{'b': 220', '125, 'an electronic control unit () configured to actuate the flow-rate regulating device () as a function of a parameter indicative of an operating condition of the vehicle.'}2101251202201251. The steering arrangement () according to claim 1 , wherein the flow-rate regulating device () is configured to regulate the flow rate in the amplification branch () within a range of flow rate values comprised between a minimum flow rate value in the amplification branch and a maximum flow rate value in the amplification branch claim 1 , and the electronic control unit () is configured to actuate the flow-rate regulating device () along said range as a function of a parameter indicative of an operating condition of the vehicle ().310220185160. The steering arrangement () according to claim 1 , wherein the electronic control unit () is configured to actuate the electric motor () as a function of the parameter indicative of an operating condition of the vehicle () so as to provide a haptic feedback to the user through a torque generated on the ...

Подробнее
03-01-2019 дата публикации

REAR AXLE STEERING SYSTEM AND METHODS OF USING THE SAME

Номер: US20190002017A1
Автор: FAY, II Jeffrey B.
Принадлежит: CNH Industrial America, LLC

The disclosure relates to a steering system useful for providing stable control during rear axle steering of harvesters, such as self-propelled windrowers. The steering system utilizes a single steering cylinder and retracted caster cylinders to regulate rotation of the casters during rear axle road operation mode. The steering system locks the steering cylinder and uses the caster cylinders for damping during in-field operation mode. 1. A steering system for a harvester , comprising:a single steering cylinder configured to be mounted to a rear axle of the harvester, the steering cylinder comprising first and second opposing ends;a right-hand side steering arm rotatably coupled at one end to a right-hand side caster cylinder, and rotatably coupled at an opposing end to a first tie rod, the first tie rod coupling the right-hand side steering arm with the first end of the steering cylinder, and the right-hand side caster cylinder coupling the right-hand side steering arm to a pivot shaft of a right-hand side caster;a left-hand side steering arm rotatably coupled at one end to a left-hand side caster cylinder, and rotatably coupled at an opposing end to a second tie rod, the second tie rod coupling the left-hand side steering arm with the second end of the steering cylinder, and the left-hand side caster cylinder coupling the left-hand side steering arm to a pivot shaft of a left-hand side caster;wherein in a road operation mode, the left and right-hand side cylinders are configured to retract and lock in a retracted position, and actuation of the steering cylinder regulates rotation of the left and right-hand side casters.2. The steering system of claim 1 , wherein the right-hand side steering arm pivots about a shaft coupled to a mounting bracket extending from the pivot shaft of the right-hand side caster.3. The steering system of claim 2 , wherein an axis of rotation of the pivot point of the right-hand side steering arm is offset from an axis of rotation of the ...

Подробнее
03-01-2019 дата публикации

HYDRAULIC STEERING DEVICE WITH ENHANCED FAULT PREVENTION

Номер: US20190002018A1

A hydraulic steering device which hydraulically connects a steering cylinder to a supply system. The supply system is hydraulically operatively connectable to the steering cylinder via a steering assembly for the purposes of forming a main flow connection, and the supply system is furthermore hydraulically operatively connectable to the steering cylinder via a flow regulating valve arrangement, such that a secondary flow connection can be formed which bypasses the main flow connection and via which at least one first working chamber and one second working chamber of the steering cylinder can be supplied independently of one another with hydraulic fluid. 1. A hydraulic steering device which hydraulically connects a steering cylinder to a supply system , wherein the supply system is hydraulically operatively connectable to the steering cylinder via a steering assembly for the purposes of forming a main flow connection and the supply system is furthermore hydraulically operatively connectable to the steering cylinder via a flow regulating valve arrangement , such that a secondary flow connection can be formed which bypasses the main flow connection and via which at least one first working chamber and one second working chamber of the steering cylinder can be supplied independently of one another with hydraulic fluid , and wherein the flow regulating valve arrangement comprises multiple independently actuable valves by means of which at least a first feed and a first return for the first working chamber and a second feed and a second return for the second working chamber can be adjusted , and wherein the hydraulic steering device furthermore comprises at least one shut-off valve for shutting off the secondary flow connection at least in sections and furthermore comprises at least one electrical control unit which is designed to output actuation currents for one or more valves ,whereinthe hydraulic steering device comprises means for measuring and for comparing at least ...

Подробнее
03-01-2019 дата публикации

METHOD AND APPARATUS FOR CONTROLLING REAR WHEEL STEERING OF VEHICLE

Номер: US20190002021A1
Автор: Yoo Sung Bem
Принадлежит:

A method for controlling rear wheel steering of a vehicle may include: determining, by a control unit, whether an error exists in rear wheel steering control input information received therein to control rear wheel steering of the vehicle; calculating, by the control unit, a rear wheel angle reduction rate for controlling rear wheels to neutral based on a yaw rate of the vehicle when it is determined that an error exists in the rear wheel steering control input information; and controlling, by the control unit, the rear wheels to neutral according to the calculated rear wheel angle reduction rate. 1. A method for controlling rear wheel steering of a vehicle , comprising:determining, by a control unit, whether an error exists in rear wheel steering control input information received therein to control rear wheel steering of the vehicle;calculating, by the control unit, a rear wheel angle reduction rate for controlling rear wheels to neutral based on a yaw rate of the vehicle when it is determined that an error exists in the rear wheel steering control input information; andcontrolling, by the control unit, the rear wheels to neutral according to the calculated rear wheel angle reduction rate.2. The method according to claim 1 , wherein claim 1 , in the calculating of the rear wheel angle reduction rate claim 1 , the control unit determines whether a yaw acceleration calculated from the yaw rate is greater than a reference value and calculates the rear wheel angle reduction rate by setting a neutral recovery time for controlling the rear wheels to neutral claim 1 , depending on a determination result claim 1 , and the neutral recovery time is initially set as a neutral recovery time initial value stored in advance.3. The method according to claim 2 , wherein claim 2 , in the calculating of the rear wheel angle reduction rate claim 2 , the control unit calculates the rear wheel angle reduction rate based on a current rear wheel angle and a neutral recovery time in a ...

Подробнее
04-01-2018 дата публикации

SYSTEMS, APPARATUSES, AND METHODS FOR MONITORING PRESSURE IN A HYDRAULIC SYSTEM

Номер: US20180005462A1
Принадлежит: CATERPILLAR INC.

A method, system, and apparatus to determine a malfunction or an abnormal pressure condition in a hydraulic system over a time period are provided. The method, system, and apparatus include monitoring hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure over the time period, and determining whether the monitored hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure are within respective predetermined ranges. A maintenance notification is output responsive to at least one of the monitored hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure being outside the respective predetermined ranges during the time period. 1. A mining truck comprising:a first hydraulic system to drive traction wheels of the mining truck;a second hydraulic system to operate a steering system of the mining truck; and a hydraulic brake pump;', 'a hydraulic brake accumulator in fluid communication with the hydraulic brake pump and the braking components of the mining truck;', 'a first sensor to sense pressure characteristics of the hydraulic brake pump;', 'a second sensor to sense pressure characteristics of the hydraulic brake accumulator; and', 'circuitry electrically coupled to the first sensor and the second sensor, and configured to:', 'receive a plurality of signals from the first sensor regarding sensed pressure characteristics of the hydraulic brake pump over a predetermined number of brake actuation cycles, the sensed pressure characteristics of the hydraulic brake pump including information regarding a maximum brake pump pressure for each of the brake actuation cycles,', 'receive a plurality of signals from the second sensor regarding sensed pressure characteristics of the hydraulic brake accumulator over the predetermined number of brake actuation cycles, the sensed pressure characteristics of the hydraulic brake accumulator including information ...

Подробнее
11-01-2018 дата публикации

STEERING RETURN CONTROL APPARATUS AND METHOD OF MOTOR DRIVEN POWER STEERING

Номер: US20180009467A1
Автор: LIM Kyoung Soo
Принадлежит: Hyundai Mobis Co., Ltd.

A steering return control apparatus of MDPS may include: a column torque sensor configured to sense a column torque of a steering wheel; a steering angle sensor configured to measure a steering angle of the steering wheel; a column velocity calculator configured to calculate a column velocity at which a steering column is rotated; a vehicle velocity sensor configured to sense a vehicle velocity; a lateral acceleration sensor configured to sense a lateral acceleration of the vehicle; and a damping controller configured to detect a damping compensation gain in an on-center region according to at least one of the column torque, the column velocity and the lateral acceleration, and applies the damping compensation gain to a default damping amount, when the steering angle falls within the on-center region while at least one of the column torque, the column velocity and the vehicle velocity satisfies a preset damping compensation condition. 1. A steering return control apparatus of MDPS (Motor Driven Power Steering) , comprising:a column torque sensor configured to sense a column torque of a steering wheel;a steering angle sensor configured to measure a steering angle of the steering wheel;a column velocity calculator configured to calculate a column velocity at which a steering column is rotated, based on the steering angle sensed by the steering angle sensor;a vehicle velocity sensor configured to sense a vehicle velocity;a lateral acceleration sensor configured to sense a lateral acceleration of the vehicle; anda damping controller configured to detect a damping compensation gain in a preset on-center region according to at least one of the column torque, the column velocity and the lateral acceleration, and applies the detected damping compensation gain to a default damping amount, when the steering angle falls within the on-center region while at least one of the column torque, the column velocity and the vehicle velocity satisfies a preset damping compensation ...

Подробнее
11-01-2018 дата публикации

Load-sensing system

Номер: US20180009471A1
Автор: William John Novacek
Принадлежит: Eaton Intelligent Power Ltd

The present disclosure relates to a load-sense system such as a load-sense steering system that operates in a static load-sense mode for low flows and operates in a dynamic load-sense mode for high flows.

Подробнее
14-01-2021 дата публикации

END-OF-TRAVEL RELIEF IN A POWER STEERING SYSTEM

Номер: US20210009195A1
Принадлежит:

An improved power steering assembly is provided. The power steering assembly includes an end-of-travel mechanism and a valve cartridge that is actuated by left and right actuator rings of the end-of-travel mechanism, the actuator rings extending partially around an output shaft. The actuator rings can be individually set for the desired end-of-travel relief to limit the maximum system pressure when the steering assembly approaches the desired axle stop setting. The valve cartridge provides an end-of-travel function and a pressure relief function and is in fluid communication with the left and right pressure chambers to recirculate hydraulic fluid in the event of a power off condition. 1. A power steering assembly comprising:a sector gear moveable in clockwise and counterclockwise directions for right and left turn steering, the sector gear including a sector gear shaft extending therefrom; a left actuator ring extending partially around the sector gear shaft and including a first cam extending radially therefrom,', 'a right actuator ring extending partially around the sector gear shaft including a second cam extending radially therefrom; and, 'an end-of-travel mechanism mounted to the sector gear shaft, the end-of-travel mechanism includinga valve cartridge including at least one poppet valve engagable by the first cam in response to rotation of the sector gear in a first direction.2. The power steering assembly of wherein the at least one poppet valve includes a first poppet valve claim 1 , the valve cartridge further including a second poppet valve engagable by the second cam in response to rotation of the sector gear in a second direction.3. The power steering assembly of further including a reset gear including first and second tangs for resetting the left and right actuator ring claim 1 , respectively claim 1 , wherein the left actuator ring and the right actuator ring rotate in fixed relation relative to the sector gear shaft claim 1 , and wherein the reset ...

Подробнее
14-01-2021 дата публикации

Steering System with Switchable Load Reaction Valve

Номер: US20210009196A1
Автор: Bowden Charles
Принадлежит:

A valve for hydraulic parallel work systems is provided. The valve includes a first pair of ports, a second pair of ports, a first connection, and a second connection. The first connection is between the first pair of ports when the valve is in a load reaction-enabling state. The first connection transmits a load reaction from a load at a steering actuator to a steering device of a hydrostatic steering circuit. The second connection is between the second pair of ports when the valve is in an electro-hydraulic steering enabling state. The second connection fluidly connects a fluid source to an electro-hydraulic steering circuit. 1. A valve comprising:a first pair of ports;a second pair of ports;a first connection between the first pair of ports when the valve is in a load reaction-enabling state, the first connection transmitting a load reaction from a load at a steering actuator to a steering device of a hydrostatic steering circuit; anda second connection between the second pair of ports when the valve is in an electro-hydraulic steering-enabling state, wherein the second connection fluidly connects a fluid source to an electro-hydraulic steering circuit.2. The valve of claim 1 , wherein the electro-hydraulic steering circuit is in a parallel fluid connection with the hydrostatic steering circuit.3. The valve of claim 1 , wherein the first connection and the second connection occur at a single position.4. The valve of claim 1 , wherein claim 1 , in the load reaction-enabling state claim 1 , the second connection between the second pair of ports is disconnected.5. The valve of claim 1 , wherein the valve switches to the load reaction-enabling state and the electro-hydraulic steering-enabling state by actuation from a solenoid.6. The valve of claim 5 , wherein the solenoid is a pilot-operated solenoid.7. The valve of claim 1 , further comprising:a third pair of ports, wherein, in the load reaction-enabling state, the first connection between the first pair of ports ...

Подробнее
09-01-2020 дата публикации

HYDRAULIC BI-DIRECTIONAL FLOW SWITCHES

Номер: US20200010109A1
Принадлежит:

Hydraulic bi-directional flow switches are disclosed. A disclosed example apparatus includes a piston disposed in a fluid channel between a first fluid connection and a second fluid connection, where the first and second fluid connections define a fluid pathway for hydraulic steering fluid. The example apparatus also includes a detector to detect a movement of the piston away from a default position of the piston, where the piston is to displace from the default position when the hydraulic steering fluid flows along the fluid pathway. 1. A method comprising:detecting movement of a piston from a default position of the piston, the piston disposed in a fluid channel that fluidly couples a first fluid connection and a second fluid connection, wherein hydraulic steering fluid moves between the first and second fluid connections to cause the movement of the piston; anddis-engaging, based on the detected movement of the piston, an automated steering system.2. The method as defined in claim 1 , further including centering the piston to the default position when the hydraulic steering fluid is not moving between the first and second fluid connections.3. The method as defined in claim 2 , wherein centering the piston occurs via a magnetic portion on at least one of the piston or a guide rod to guide the piston.4. The method as defined in claim 1 , wherein the piston is centered to the default position by a spring.5. The method as defined in claim 1 , further including detecting a direction of movement of the piston.6. The method as defined in claim 1 , wherein detecting movement of the piston includes detecting a magnetic field change corresponding to movement of a detection portion of the piston.7. A hydraulic steering system comprising:a steering valve defining a first fluid connection;a steering cylinder defining a second fluid connection, wherein hydraulic steering fluid moves between the first and second fluid connections;a piston disposed in a fluid channel between the ...

Подробнее
18-01-2018 дата публикации

SYSTEM AND METHOD TO ELIMINATE OR REDUCE FRAME CONTACT DURING OPERATION OF ARTICULATED MACHINE

Номер: US20180015927A1
Принадлежит: CATERPILLAR INC.

A system and method for limiting articulation between a front frame and a rear frame of an articulated machine are disclosed. The system and method receive steering signals and determine impending contact between the front frame and the rear frame based on the received steering signals. Additionally, an amount by which to reduce torque at a hitch coupled between the front and rear frames so as to limit an articulation characteristic of the front frame relative to the rear frame to a predetermined value is determined, responsive to determination of impending contact. Prior to contact, rimpull of the articulated machine is reduced based on the determined amount of torque. 1. An articulated heavy equipment work vehicle comprising:a front frame having a first pair of wheels and a hydraulically controlled tool;a rear frame having a second pair of wheels;a hitch pivotally coupling the front frame to the rear frame according to a predetermined maximum mechanical articulation angle range defined by a first frame stop associated with a left-most articulation angle and a second frame stop associated with a right-most articulation angle;a powertrain configured to drive the first and second pairs of wheels;a steering system configured to provide controlled rotation of the front frame relative to the rear frame about the hitch according to a predetermined articulation angle range less than the predetermined maximum mechanical articulation angle range defined by the first and second frame stops;sensor circuitry configured to sense real-time articulation conditions of the front frame relative to the rear frame; andprocessing circuitry configured todetermine impending contact between one of the front frame and the rear frame and one of the first frame stop and the second frame stop based on signals from the sensor circuitry corresponding to the real-time articulation conditions indicating torque at the hitch exceeds a predetermined torque capability of the steering system,determine ...

Подробнее
18-01-2018 дата публикации

ROADWAY MARKER CONTROL SYSTEM

Номер: US20180016758A1
Принадлежит: LimnTech LLC

A GPS-based control system for positioning a nozzle projection onto a predetermined roadway mark path includes a vehicle having an attached paint carriage which is laterally movable with respect to the vehicle, a first GPS antenna, a first GPS receiver responsive to the first GPS antenna, a first signal processor for determining the geographical location of the first GPS antenna, a linear motion and position sensor, a GPS location processor for determining the absolute GPS location of the paint carriage, a coordinate transform processor for transforming the absolute GPS location of the paint carriage into a location in a coordinate system other than GPS, a comparator for comparing the location of the paint carriage in the other coordinate system to a desired roadway mark path according to the other coordinate system, and a control system for positioning the nozzle projection onto the roadway mark path. 1. A GPS-based control system for positioning a material dispensing nozzle over a predetermined roadway mark path located on a roadway surface comprising:a vehicle having an attached paint carriage which is laterally movable which respect to the vehicle;a material dispensing nozzle attached to the paint carriage;a first GPS antenna mounted on the vehicle;a first GPS receiver responsive to the first GPS antenna;a first signal processor responsive to the first GPS receiver for determining the geographical location of the first GPS antenna;a linear motion and position sensor for determining the relative lateral linear displacement of the paint carriage with respect to the vehicle;a GPS location processor responsive to the first signal processor and to the linear motion and position sensor for determining the absolute GPS location of the material dispensing nozzle;a coordinate transform processor for transforming the absolute GPS location of the material dispensing nozzle into a location in a coordinate system other than GPS;a comparator for comparing the location of the ...

Подробнее
15-01-2015 дата публикации

ELECTRIC ACTUATOR-INTEGRATED ELECTRIC POWER STEERING SYSTEM AND METHOD OF CONTROLLING THE SAME

Номер: US20150019078A1
Автор: Jung Dae Suk, Park Soo Bo
Принадлежит: HYUNDAI MOTOR COMPANY

An electric actuator-integrated electric power steering system may include an integrated motor which provides rotational force, a hydraulic pump connected to one end of the integrated motor and supplied with the rotational force from the integrated motor to pump working fluid that is used to transmit steering force, and an electric actuator connected to the other end of the integrated motor via a power controlling means. The electric actuator may operate when the rotational force is transmitted to the electric actuator and whether the rotational force from the integrated motor is transmitted to or cut off from the electric actuator may depend on an operation of the power controlling means. 1. An electric actuator-integrated electric power steering system comprising:an integrated motor which provides rotational force;a hydraulic pump connected to one end of the integrated motor, wherein the hydraulic pump is supplied with the rotational force from the integrated motor to pump working fluid that is used to transmit steering force; andan electric actuator connected to the other end of the integrated motor via a power controlling means, wherein the electric actuator operates when the rotational force is transmitted to the electric actuator and whether the rotational force from the integrated motor is transmitted to or cut off from the electric actuator depends on an operation of the power controlling means.2. The electric actuator-integrated electric power steering system according to claim 1 , wherein the hydraulic pump is connected to the integrated motor such that the rotational force from the integrated motor is continuously supplied to the hydraulic pump.3. The electric actuator-integrated electric power steering system according to claim 1 , wherein the power controlling means comprises an electromagnetic clutch which turns on/off depending on whether or not a current is induced.4. The electric actuator-integrated electric power steering system according to claim ...

Подробнее
25-01-2018 дата публикации

HYDRAULIC ARRANGEMENT WITH TWO DRIVE MOTORS

Номер: US20180022380A1
Принадлежит: Weber-Hydraulik GmbH

A hydraulic drive arrangement () for the pressure supply of a hydraulic steering system (), particularly for construction or agricultural machines, including a hydraulic pump () and an electric drive. It is essential that the electric drive is designed in a redundant fashion and has two separately controlled electric drive engines (), which are mechanically coupled via the hydraulic pump () in a rigid fashion, and that the separate control circuits () are provided by which a variable load distribution can be specified for the electric drive engines (). 112332667733abababab. A hydraulic drive arrangement () for pressure supply of a hydraulic steering system , comprising a hydraulic pump () , a redundant electric drive that comprises two separately controlled electric drive engines ( , ) that are mechanically coupled to each other via the hydraulic pump () in a rigid fashion , and separate control circuits ( , , , ) by which a variable load distribution over the electric drive engines ( , ) is specified.21336633ababab. The hydraulic drive arrangement () according to claim 1 , wherein the electric drive engines ( claim 1 , ) each comprise motor controllers ( claim 1 , ) that are embodied to control the electric drive engines ( claim 1 , ).3177666677abababab. The hydraulic drive arrangement () according to claim 2 , wherein the control circuits ( claim 2 , ) are each integrated in the motor controllers ( claim 2 , ) claim 2 , and the motor controllers ( claim 2 , ) each are formed with a motor control and a control logic acting as the control circuit ( claim 2 , ).416677abab. The hydraulic drive arrangement () according to claim 1 , wherein the control circuits ( claim 1 , claim 1 , claim 1 , ) are embodied to monitor each other for malfunctions.51667733ababab. The hydraulic drive arrangement () according to claim 4 , wherein in case of a detected malfunction the control circuit ( claim 4 , claim 4 , claim 4 , ) not affected by the malfunction is configured to adjust an ...

Подробнее
25-01-2018 дата публикации

Power steering device

Номер: US20180022381A1
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

Provided is a power steering device capable of causing control that uses a pump device and control that uses an electric motor on an input shaft to cooperate with each other. The power steering device includes a power cylinder including a pair of hydraulic chambers partitioned by a piston and configured to generate a steering assist force for a steered wheel, a pump device configured to be driven through control by a first electric motor and configured to discharge working fluid, a rotary valve configured to selectively supply the working fluid supplied from the pump device to the pair of hydraulic chambers in accordance with relative rotation between the input shaft and the output shaft, a second electric motor provided so as to surround at least a part in an axial direction of the input shaft and configured to control the rotation of the input shaft, and a second electric motor control part installed in a control device and configured to output a control signal for controlling driving of the second electric motor based on a revolution number signal of the first electric motor.

Подробнее
04-02-2016 дата публикации

Wheel Imbalance Rejection Module

Номер: US20160031481A1
Принадлежит:

A control system and method for a hydraulic-power steering system of a vehicle including magnetic torque overlay (MTO) is provided. The control system and method minimize undesirable vibration in a hand wheel of the vehicle as a result of disturbance in its front road wheels (e.g., road-wheel imbalance). In the control system and method, a desired torque command is determined or generated. At least the desired torque command is passed to a disturbance-rejection module. The disturbance-rejection module modifies the desired torque command to minimize the vibration. 1. A method of reducing vibration in a hand wheel of a steering system of a vehicle including magnetic torque overlay (MTO) , the method comprising:determining a desired torque command;passing at least the desired torque command to a disturbance-rejection module; andmodifying the desired torque command to minimize the vibration.2. The method of claim 1 , further comprising:providing a resulting final torque command to a current-command module that converts the desired torque command into a required current command;applying the required current command to a steering gear of the MTO steering system; andusing at least the required current command to generate an estimation of torque by a driver of the vehicle.3. The method of claim 2 , wherein at least one of differential pressure across the MTO steering system and at least one signal of the vehicle is measured and the measurement is used to generate the desired torque command.4. The method of claim 3 , wherein the differential pressure is across a piston in the MTO steering system.5. The method of claim 3 , wherein the at least one vehicle signal includes at least one of speed of the vehicle and angle of the hand wheel.6. The method of claim 5 , wherein the speed of the vehicle includes speed of at least one front road wheel of the vehicle.7. The method of claim 5 , wherein at least one torque signal of a driver of the vehicle is estimated and the estimate is ...

Подробнее
31-01-2019 дата публикации

Hydraulic Steering Facility with Load Signal

Номер: US20190031233A1

The invention relates to a hydraulic steering facility for mobile systems, with a steering circuit for a steering facility and a working circuit for a working hydraulic system, whereby the steering circuit and the working hydraulic system are connected to a supply pump via a shared flow dividing valve and the flow dividing valve is connected to a load signal connection of the steering device. It is provided that the steering facility has an adjustable input choke that is connected via an inflow connection of the steering facility to the flow dividing valve, between the load signal connection and downstream of the input choke, a parallel circuit consisting of a choke and an adjustable second load signal choke is arranged, and the load signal connection is further connected via an adjustable first load signal choke to a return flow connection of the steering facility. 1. A hydraulic steering facility for mobile systems , with a steering circuit for a steering facility and a working circuit for a working hydraulic system , whereby the steering circuit and the working hydraulic system are connected to a supply pump via a shared flow dividing valve and the flow dividing valve is connected to a load signal connection of the steering device ,characterized in thatthe steering facility has an adjustable input choke that is connected via an inflow connection of the steering facility to the flow dividing valve, between the load signal connection and downstream of the input choke, a parallel circuit consisting of a choke and an adjustable second load signal choke is arranged, and the load signal connection is further connected via an adjustable first load signal choke to a return flow connection of the steering facility.2. The hydraulic steering facility according to claim 1 ,characterized in thatthe input choke and the second load signal choke have opposite closure characteristics.3. The hydraulic steering facility according to claim 1 ,characterized in thatthe input choke is ...

Подробнее
11-02-2016 дата публикации

MULTI-MODE STEERING CONTROL FOR A VEHICLE

Номер: US20160037707A1
Принадлежит:

A steering system and method is described for a vehicle having steerable front and rear wheels, and a steering input device for receiving manual steering input. Front and rear hydraulic steering devices may be coupled, respectively, to the front and rear wheels. Front and rear valve assemblies may be configured, respectively, to steer the front and rear wheels. In a manual steering mode, the front valve assembly may be disabled with respect to the front steering device, and the front hydraulic steering device may steer the front wheels based upon the manual steering input. In a rear steering assist mode, a rear steering command may be determined based upon the manual steering input, and the rear wheels steered based upon the rear steering command. In an automated steering mode, the front and rear wheels may be automatically steered based upon a target path of travel for the vehicle. 1. A steering system for an agricultural vehicle having one or more steerable front wheels , one or more steerable rear wheels , and a steering input device configured to receive a manual steering input for the one or more steerable front wheels , the steering system comprising:a front hydraulic steering device coupled to at least one of the one or more steerable front wheels;a rear hydraulic steering device coupled to at least one of the one or more steerable rear wheels;a front valve assembly configured to hydraulically control the front hydraulic steering device in order to steer the at least one steerable front wheel;a rear valve assembly configured to hydraulically control the rear hydraulic steering device in order to steer the at least one steerable rear wheel; anda controller configured to determine a front steering command and provide the front steering command to the front valve assembly, the controller also being configured to determine a rear steering command and provide the rear steering command to the rear valve assembly;wherein, in a manual steering mode, the front valve ...

Подробнее
11-02-2016 дата публикации

REAR WHEEL STEERING CONTROL

Номер: US20160039455A1
Принадлежит: ROBERT BOSCH GMBH

A rear wheel steering system in a vehicle. The system includes a rear wheel steering actuator, a vehicle speed sensor, and an electronic control unit. The rear wheel steering actuator is coupled to a rear wheel of the vehicle and controls a steering angle of the rear wheel. The electronic control unit is coupled to the rear wheel steering actuator and the vehicle speed sensor and is configured to determine a speed of the vehicle and to limit the steering angle of the rear wheel based on the speed of the vehicle and a fault tolerant time of the rear wheel steering system. 1. A rear wheel steering system in a vehicle , the system comprising:a rear wheel steering, actuator coupled to a rear wheel of the vehicle and controlling a steering angle of the rear wheel;a vehicle speed sensor; anda controller coupled to the rear wheel steeling actuator and the vehicle speed sensor and configured to determine a speed of the vehicle and to limit the steering angle of the rear wheel based on the speed of the vehicle and a fault tolerant time of the rear wheel steering system.2. The rear wheel steering system of claim 1 , wherein the vehicle speed sensor is a wheel speed sensor.3. The rear wheel steering system of claim 1 , further comprising claim 1 , one or more additional speed sensors.4. The rear wheel steering system of claim 3 , wherein the one or more additional speed sensors are from a group including a longitudinal acceleration sensor claim 3 , a lateral acceleration sensor claim 3 , and a yaw rate sensor.5. The rear wheel steering system of claim 3 , wherein the steering angle of the rear wheel is based on the higher of a speed determined by the one or more additional sensors and a speed determined by the wheel speed sensor.6. The rear wheel steering system of claim 1 , wherein a maximum yaw rate is set based. on the speed of the vehicle.7. The rear wheel steering system of claim 1 , wherein a maximum steering angle is determined based on the speed of the vehicle and a ...

Подробнее
12-02-2015 дата публикации

ELECTRO-HYDRAULIC POWER STEERING APPARATUS FOR ENVIRONMENT-FRIENDLY VEHICLE AND METHOD OF CONTROLLING THE SAME

Номер: US20150041239A1
Автор: Choi Young Seol
Принадлежит: HYUNDAI MOTOR COMPANY

An electro-hydraulic power steering apparatus for an environment-friendly vehicle and a method of controlling the same is provided. In particular, a gear box assists in a steering force of a steering wheel, and a reservoir tank stores hydraulic oil therein. An electro-hydraulic power pump pumps the hydraulic oil via an electric motor to supply the hydraulic oil to the gear box. A first valve is mounted to a hydraulic line through which the hydraulic oil flows from the electro-hydraulic power pump to the gear box, and a second valve is mounted to a hydraulic line through which the hydraulic oil returns from the gear box to the reservoir tank. 1. An electro-hydraulic power steering apparatus for an environment-friendly vehicle , the apparatus comprising:a gear box for assisting a steering force of a steering wheel;a reservoir tank for storing hydraulic oil; andan electro-hydraulic power pump for pumping the hydraulic oil by an electric motor to supply the hydraulic oil to the gear box;a first valve mounted within a hydraulic line through which the hydraulic oil flows from the electro-hydraulic power pump to the gear box; anda second valve mounted within a hydraulic line through which the hydraulic oil returns from the gear box to the reservoir tank.2. The apparatus of claim 1 , wherein the first valve is a check valve claim 1 , and the second valve is a solenoid valve.3. A method of controlling an electro-hydraulic power steering apparatus for an environment-friendly vehicle claim 1 , the method comprising:determining, by a controller, whether a steering angle of a steering wheel has been tuned at or beyond a particular angle;in response to determining that the steering angle is at or beyond the particular angle, determining, by a controller, whether the steering angle has changed with a particular time period;controlling, by a controller, a first valve mounted within a hydraulic oil line through which hydraulic oil flows from an electro-hydraulic power pump to a gear ...

Подробнее
24-02-2022 дата публикации

Work machine

Номер: US20220056671A1
Автор: Takatoshi Ooki
Принадлежит: HITACHI CONSTRUCTION MACHINERY CO LTD

The present invention provides a work machine including a steering device that is very responsive to switching operations. The work machine includes: a proportional solenoid valve for outputting a first pilot pressure oil with a pressure responding to a steering signal; a solenoid valve for outputting a second pilot pressure oil with a predetermined pressure while the steering signal is outputted from the steering device; a switching valve capable of switching to a first state of outputting the first pilot pressure oil to a directional control valve and a second state of outputting the second pilot pressure oil to the directional control valve, while the first pilot pressure oil is outputted from the proportional solenoid valve and the second pilot pressure oil is outputted from the solenoid valve in parallel; and a controller to switch the switching valve from the first state to the second state in a case where a malfunction is detected in a main circuit ranging from the steering device to the directional control valve via the proportional solenoid valve and the switching valve of the first state.

Подробнее
19-02-2015 дата публикации

Universal cartridge torque overlay assembly

Номер: US20150047919A1
Принадлежит: Steering Solutions IP Holding Corp

In one aspect of the invention, a power steering assist system is provided. The system includes a housing, an actuator assembly, a rotary valve assembly, a bearing assembly, a differential pressure transducer, and a coupler. The coupler includes a first end and a free second end, the free second end extending from the housing and configured to couple to a component of a steering gear system.

Подробнее
03-03-2022 дата публикации

METHOD OF A VARIABLE STEERING RESPONSE FOR DIFFERENT STEERING OPERATIONS OF A WORKING MACHINE AND SYSTEM THEREOF

Номер: US20220061204A1
Принадлежит:

A steering system for controlling an agricultural machine having a pair of front wheels and a pair of rear wheels includes a controller, an operator steer input for communicating a steer command, a steer input sensor for detecting and outputting the steer command to the controller, a primary differential steering system for operably controlling the pair of front wheels, and a secondary steering system for operably controlling the pair of rear wheels. The secondary steering system includes a first actuator for controlling a first rear wheel and a second actuator for controlling a second rear wheel. The primary differential steering system is controlled based on the steer command. The controller outputs a control signal to operably actuate the first and second actuators at a non-linear steering gain rate as a function of the steer command. 1. A steering system for controlling an agricultural machine having a front traction mechanism and a pair of rear wheels , comprising:a controller;an operator steer input configured to be operably controlled by an operator to communicate a steer command;a steer input sensor in communication with the operator steer input and the controller, the steer input sensor configured to detect and output the steer command to the controller;a primary differential steering system for operably controlling the front traction mechanism; anda secondary steering system for operably controlling the pair of rear wheels, the secondary steering system comprising a first actuator for controlling a first rear wheel of the pair of rear wheels and a second actuator for controlling a second rear wheel of the pair of rear wheels;wherein, the primary differential steering system is controlled based on the steer command;wherein, the controller outputs a control signal to operably actuate the first and second actuators at a non-linear steering gain rate as a function of the steer command.2. The steering system of claim 1 , wherein the first and second actuators ...

Подробнее
14-02-2019 дата публикации

Hydraulic steering arrangement

Номер: US20190052159A1
Принадлежит: Danfoss Power Solutions ApS

A hydraulic steering arrangement is described comprising a steering unit ( 1 ), a steering wheel and a steering wheel angle sensor ( 3 ) detecting an angle of rotation between the steering wheel and the steering unit ( 1 ). Such a steering arrangement should have a simple construction. To this end the steering wheel angle sensor ( 3 ) comprises a transmitter/receiver arrangement fixed to the steering unit ( 1 ) and a target assembly ( 4 ) which is rotateably fixed to the steering wheel by means of a connection geometry ( 9 ) and comprises a passive reaction arrangement.

Подробнее
05-03-2015 дата публикации

Swimming Pool Cleaner

Номер: US20150059106A1
Принадлежит: POOLVERGNUEGEN

Disclosed herein are a steering system for a suction cleaning device, a locomotion system for a pool cleaner, and a turbine for use in an automatic cleaner. The steering system includes a fluid driven turbine that rotates a cam gear that is interconnected with a cam wheel for directing a drive pinion. The drive pinion is positionable in a plurality of positions to drive a nose cone that steers the suction cleaning device. The locomotion system includes first and second A-frame arms that respectively engage first and second bearings about first and second eccentrics of a turbine. Rotation of the turbine causes the first and second A-frame arms to rotate back and forth driving associated walking pod assemblies. The turbine includes a turbine rotor and a plurality of vanes connected to the turbine rotor. The plurality of vanes including lateral edges having lateral open regions to facilitate debris-removing efficiency. 1. In an automatic pool cleaner of the type motivated by flow of water therethrough to move along a pool surface to be cleaned , the flow of water being established by pumping action of a remote pump communicating with the pool-cleaner body through a hose connected thereto , the pool cleaner including a steering system connected to the hose to direct movement of the pool cleaner with respect to the hose , the improvement comprising:a steering drive mechanism secured with respect to the cleaner body and including a main rotatable member;a steering drive train from the main rotatable member to a steering mechanism which is secured with respect to the hose and steers the cleaner body in a plurality of directions with respect to the hose, the steering mechanism including first and second gear tracks for steering movement of the cleaner body with respect to the hose; anda cam drive train from the main rotatable member to a cam mechanism which includes a cam wheel rotatably secured with respect to the cleaner body and operatively connected to the steering ...

Подробнее
01-03-2018 дата публикации

METHODS AND APPARATUSES FOR DISTURBANCE AND STABILITY DETECTION BY VEHICLE GUIDANCE SYSTEMS

Номер: US20180057045A1
Автор: NyKamp Alex
Принадлежит: Deere & Company

In an example embodiment, a vehicle control system includes a memory including computer-readable instructions stored therein and a processor. The processor configured to execute the computer-readable instructions to receive information corresponding to, a yaw rate of a vehicle, a lateral position of the vehicle and a heading angle of the vehicle, determine a stability indicator indicating an estimate of a stability of the vehicle based on the received information, and adjust one or more gains of a steering system of the vehicle based on the determined stability indicator. 1. A vehicle control system comprising:a memory including computer-readable instructions stored therein; and receive information corresponding to, a yaw rate of a vehicle, a lateral position of the vehicle and a heading angle of the vehicle,', 'determine a stability indicator indicating an estimate of a stability of the vehicle based on the received information, and', 'adjust one or more gains of a steering system of the vehicle based on the determined stability indicator., 'a processor configured to execute the computer-readable instructions to,'}2. The vehicle control system of claim 1 , wherein the received information includes an error in the lateral position of the vehicle with respect to a reference line and an error in the heading angle of the vehicle with respect to the reference line.3. The vehicle control system of claim 2 , wherein the processor is further configured to execute the computer-readable instructions to claim 2 ,determine if the yaw rate is greater than a first threshold,determine if the error in the lateral position of the vehicle is greater than a second threshold,determine if the error in the heading angle of the vehicle is greater than a third threshold, anddetermine the stability indicator based on whether the yaw rate is greater than the first threshold, whether the error in the lateral position of the vehicle is greater than the second threshold, and whether the error ...

Подробнее
17-03-2022 дата публикации

STEERING CONTROL DEVICE

Номер: US20220081025A1
Принадлежит:

A steering control device includes an electronic control unit configured to calculate a target reaction torque that is a target value of a steering reaction force that is a force against steering input to a steering unit and to control operation of a steering-side motor provided in the steering unit such that a motor torque corresponding to the target reaction torque is generated. The electronic control unit is configured to calculate an angle axial force, as an axial component based on an axial force acting on a turning shaft that operates to turn turning wheels, the angle axial force being an axial force in which road-surface information is not reflected, and the angle axial force being determined according to an angle convertible to a turning angle of the turning wheels. The electronic control unit is configured to perform a guard process such that the angle axial force is not excessive. 1. A steering control device configured to control a steering system with a structure in which a power transmission path between a steering unit and a turning unit that turns turning wheels according to steering input to the steering unit is cut off , the steering control device comprising:an electronic control unit configured to calculate a target reaction torque that is a target value of a steering reaction force that is a force against the steering input to the steering unit and to control operation of a steering-side motor that is provided in the steering unit such that a motor torque corresponding to the target reaction torque is generated,wherein the electronic control unit is configured to calculate an angle axial force, as an axial component based on an axial force acting on a turning shaft that operates to turn the turning wheels, the angle axial force being an axial force in which road-surface information is not reflected, and the angle axial force being determined according to an angle convertible to a turning angle of the turning wheels, andwherein the electronic ...

Подробнее
10-03-2016 дата публикации

Electrohydraulic steer-by-wire steering system

Номер: US20160068182A1
Принадлежит: Deere and Co

An electrohydraulic steer-by-wire steering system has an operator interface for specifying a turning angle, which is associated with a sensor for the acquisition of a position or movement of the operator interface. An electronic control device is connected to a first electrohydraulic circuit and to a second electrohydraulic circuit and set up in order to actuate the two electrohydraulic circuits as a function of a signal from the sensor. The system further includes a steering actuator for adjusting the turning angle of a steerable wheel. The steering actuator has two chambers each of which is connected simultaneously to the two electrohydraulic circuits.

Подробнее
11-03-2021 дата публикации

REAR END STEERING AND MOUNTING SYSTEM

Номер: US20210070354A1
Автор: Eaton Justin
Принадлежит:

A steering and suspension assembly for the rear wheels of an off-road vehicle includes: a) a first suspension component; b) a first steering component; c) a CV axle; d) a portal box assembly; e) a hydraulic steering assembly for moving the first steering component a distance effective to turn the vehicle at least 2° in either direction when the assembly is mounted to a wheel hub; f) a first suspension connection bracket for connecting the first suspension component to the rear wall of the portal box assembly; and g) a first steering connection bracket for connecting the first steering component to the rear wall of the portal box assembly. The portal box assembly includes: i) a housing having a rear wall, a front wall, and a side wall, wherein the rear wall includes a vehicle axle opening effective to receive the end of said CV axle, and wherein the front wall includes an output shaft opening effective to allow an output shaft to extend outward from the housing; ii) a linking mechanism housed in the housing and effective for linking a CV axle received in the vehicle axle opening to an output shaft; and iii) an output shaft operably connectable via the linking mechanism to the CV axle, and effective to rotate upon rotation of the stock axle. 1. A steering and suspension assembly for the rear wheels of an off-road vehicle , comprising:a) a first suspension component;b) a first steering component;c) a CV axle;d) a wheel hub assembly for mounting a wheel, directly or indirectly, to the CV axle;e) a hydraulic steering assembly for moving the first steering component a distance effective to turn the vehicle at least 2° in either direction when the assembly is mounted, directly or indirectly, to said wheel hub assembly.f) a first suspension connection bracket for connecting the first suspension component to the wheel hub assembly; andg) a first steering connection bracket for connecting the first steering component to the wheel hub assembly.2. A steering and suspension ...

Подробнее
24-03-2022 дата публикации

Power assisting steering system and a method of operating a power assisting steering system

Номер: US20220089213A1
Принадлежит: Volvo Truck Corp

The invention relates to a power assisting steering system for a vehicle having at least a first and a second steered wheel, the system comprising a control unit configured to receive input on a desired change of steering angle, a first and a second power generating device configured to provide power assisted steering for turning the first and the steered wheel, respectively. The control unit, in response to the received input, is configured to alternatingly activate and deactivate the first and second power generating device, respectively, so as to repeatedly and alternatingly provide power assistance to the first and the second steered wheel as the first and second steered wheels are turned to achieve the desired change of steering angle. The invention also relates to a method of operating a power assisting steering system.

Подробнее
24-03-2022 дата публикации

STEERING CONTROL DEVICE

Номер: US20220089218A1
Принадлежит:

A steering control device controls a turning motor that generates a turning force for causing turning wheels of which power transmission to and from a steering wheel is cut off to turn. The steering control device includes a first processor configured to change a steering angle ratio which is a ratio of a turning angle of the turning wheels to a steering angle of the steering wheel according to a vehicle speed through control of the turning motor and a second processor configured to change a degree of change of the steering angle ratio with respect to change of the vehicle speed according to a steering state or a vehicle state. 1. A steering control device configured to control a turning motor that generates a turning force for causing turning wheels of which power transmission to and from a steering wheel is cut off to turn , the steering control device comprising:a first processor configured to change a steering angle ratio which is a ratio of a turning angle of the turning wheels to a steering angle of the steering wheel according to a vehicle speed through control of the turning motor; anda second processor configured to change a degree of change of the steering angle ratio with respect to change of the vehicle speed according to a steering state or a vehicle state.2. The steering control device according to claim 1 , wherein the second processor is configured to prohibit the change of the steering angle ratio with respect to the change of the vehicle speed when the steering wheel is being held at a constant steering angle with respect to a neutral position or when the vehicle is turning.3. The steering control device according to claim 1 , wherein the second processor is configured to slow down the degree of change of the steering angle ratio with respect to the change of the vehicle speed when the steering wheel is being held at a constant steering angle with respect to a neutral position or when the vehicle is turning.4. The steering control device according ...

Подробнее
07-03-2019 дата публикации

Device and method for maintaining a produced hydraulic pressure

Номер: US20190071118A1

A device for maintaining a hydraulic pressure, which can be set by a pressure generator, including: an inlet for coupling to the pressure generator; an outlet for providing the hydraulic pressure; at least a first check valve, which is configured to open a flow path from the inlet to the outlet when a first opening pressure is exceeded and to prevent flow in the opposite direction; and a switching apparatus between the inlet and the outlet, wherein the switching apparatus is configured to hold the hydraulic pressure at the outlet if a pressure produced by the pressure generator is greater than a switching pressure, and to reduce the hydraulic pressure at the outlet if a pressure produced by the pressure generator is less than the switching pressure, wherein the switching pressure is less than the first opening pressure. Also described are a hydraulic system, a power-steering system, vehicle, and method.

Подробнее
16-03-2017 дата публикации

LOAD-REACTION SWITCHING VALVE ASSEMBLY

Номер: US20170072998A1
Автор: Krahn Aaron Kelly
Принадлежит:

A steering system for a vehicle includes a fluid pump, an actuator in selective fluid communication with the fluid pump, a hydrostatic steering system and an electro-hydraulic steering system. The hydrostatic steering system includes a fluid controller having a first proportional valve in fluid communication with the fluid pump and a fluid meter in fluid communication with the first proportional valve and the actuator. The electro-hydraulic steering system includes a second proportional valve in selective fluid communication with the fluid pump and the actuator. The second proportional valve is disposed in parallel to the first proportional valve. The electro-hydraulic steering circuit further includes a load-reaction switching valve assembly disposed in series with the first proportional valve of the hydrostatic steering system. The load-reaction switching valve allows fluid communication between the actuator and the fluid controller when the first proportional valve is in a neutral position. 1. A steering system for a vehicle comprising:a fluid pump;an actuator in selective fluid communication with the fluid pump; a first proportional valve in fluid communication with the fluid pump;', 'a fluid meter in fluid communication with the first proportional valve and the actuator;, 'a hydrostatic steering system including a fluid controller having 'a second proportional valve in selective fluid communication with the fluid pump and the actuator, wherein the second proportional valve is disposed in parallel to the first proportional valve; and', 'an electro-hydraulic steering system includinga load-reaction switching valve assembly disposed in series with the first proportional valve of the hydrostatic steering system, wherein the load-reaction switching valve assembly allows fluid communication between the actuator and the fluid controller when the first proportional valve is in a neutral position.2. The steering system of claim 1 , wherein the electro-hydraulic steering ...

Подробнее
16-03-2017 дата публикации

VEHICLE STEERING SYSTEM

Номер: US20170073001A1
Автор: OYA Toshiaki
Принадлежит: JTEKT CORPORATION

A vehicle steering system includes a higher-level ECU and a lower-level ECU. The lower-level ECU includes a steered angle limit setter, and steered angle limiters. The steered angle limit setter sets an allowable upper limit to a target inner and outer wheel steered angle difference responsive to the absolute value of a target outer steered angle. The steered angle limit setter calculates a limit to the absolute value of a target inner steered angle. The steered angle limit setter subsequently sets this limit for one of the steered angle limiters that is fed the target inner steered angle in the present calculation cycle. The limiter, which is fed the target inner steered angle, limits the absolute value of the target inner steered angle so that the absolute value of the target inner steered angle is equal to or below the limit, and outputs the resulting value. 1. A vehicle steering system , which includes a right steering operation mechanism to steer a right steered wheel and a left steering operation mechanism to steer a left steered wheel , and in which a steering member to be operated in steering a vehicle in a desired direction is mechanically coupled to neither of the right steering operation mechanism and the left steering operation mechanism , the right steering operation mechanism being driven by a right steering motor and the left steering operation mechanism being driven by a left steering motor , the system comprising:a higher-level control device to set a target right steered angle and a target left steered angle, the target right steered angle being a target value for a steered angle of the right steered wheel, the target left steered angle being a target value for a steered angle of the left steered wheel; anda lower-level control device to drive and/or control the right steering motor on the basis of the target right steered angle received from the higher-level control device, and drive and/or control the left steering motor on the basis of the ...

Подробнее
05-03-2020 дата публикации

VEHICLE STEERING SYSTEM

Номер: US20200070886A1
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

A system includes a torque overlay device having an input shaft and an output shaft coupled to the input shaft. The system includes a steering wheel coupled to the input shaft. The system includes a processor and a memory storing instructions executable by the processor to detect a torque applied to the input shaft and to actuate the torque overlay device to provide torque to the output shaft in a direction opposite the torque applied to the input shaft. 1. A system , comprising:a torque overlay device having an input shaft and an output shaft coupled to the input shaft;a steering wheel coupled to the input shaft;a processor; anda memory storing instructions executable by the processor to detect a torque applied to the input shaft and to actuate the torque overlay device to provide torque to the output shaft in a direction opposite the torque applied to the input shaft.2. The system of claim 1 , wherein the torque overlay device includes a torsion bar connecting the input shaft to the output shaft.3. The system of claim 2 , wherein the memory stores instructions executable by the processor to detect the torque applied to the input shaft based on a detected strain of the torsion bar.4. The system of claim 1 , further comprising a hydraulic steering assembly coupled to the output shaft.5. The system of claim 4 , wherein the hydraulic steering assembly includes a first pressure regulator claim 4 , a second pressure regulator that outputs fluid at a lower pressure than the first pressure regulator claim 4 , and a valve designed to selectively provide fluid to the first pressure regulator or the second pressure regulator.6. The system of claim 5 , wherein the memory stores instructions executable by the processor to actuate the valve to provide fluid to the second pressure regulator in response to detecting a fault.7. The system of claim 5 , wherein the valve is designed to provide fluid to the second pressure regulator when the valve is in an unpowered state.8. The ...

Подробнее
26-03-2015 дата публикации

RATCHET ASSEMBLY AND ROTATIONAL SENSOR DRIVE MECHANISM

Номер: US20150083517A1
Принадлежит:

A ratchet assembly may include a steer ring, a steer ring side structure, a steer cylinder bracket arm, a steer cylinder, a ratchet lock gear, a steering collar, a ratchet cylinder, a ratchet lock bar, and at least one sensor. When in a particular locked position, operation of the steer cylinder rotates the steer ring, the ratchet lock gear, and the steering collar. When in an unlocked position, operation of the steer cylinder rotates the steer ring around the ratchet lock gear. 1. A system , comprising: an outer leg housing;', 'a leg cylinder housing;', 'a leg cylinder, wherein a bottom portion of the leg cylinder is coupled to the leg cylinder housing and a top portion of the leg cylinder is coupled to the outer leg housing;', 'a leg cylinder rotational sensor configured to sense the rotation of the leg cylinder;', a steer ring;', 'a steer ring side structure, wherein a portion of the steer ring side structure is coupled to the steer ring;', 'a steer cylinder bracket arm, wherein a portion of the steer cylinder bracket arm is coupled to the outer leg housing;', 'a steer cylinder configured to extend or retract, wherein a first portion of the steer cylinder is coupled to the steer cylinder bracket arm and a second portion of the steer cylinder is coupled to the steer ring;', 'a ratchet lock gear including at least two ratchet lock bar slots, wherein the ratchet lock gear is surrounded by the steer ring;', 'a steering collar coupled to the ratchet lock gear and the leg cylinder housing;', 'a ratchet cylinder configured to extend or retract, wherein a first end portion of the ratchet cylinder is coupled to the steer ring side structure;', 'a ratchet lock bar attached to a second end portion of the ratchet cylinder, wherein the ratchet lock bar being engaged with one of the at least two ratchet lock bar slots of the ratchet lock gear corresponds to a particular locked position, and wherein the ratchet lock bar being disengaged with the ratchet lock gear corresponds to ...

Подробнее
14-03-2019 дата публикации

METHOD FOR DETERMINING ASSIST TORQUE OF POWER STEERING SYSTEM

Номер: US20190077447A1
Автор: KIM Chan Jung
Принадлежит:

A method for determining an assist torque of a power steering system in a vehicle: setting an initial slope indicating a correlation between a driver steering torque and a vehicle lateral acceleration, wherein the initial slope is a tangential slope at a lowest point of the vehicle lateral acceleration defined in a diagram; setting a maximum driver steering torque, which is a maximum value of a steering torque that a driver applies through a steering wheel of the vehicle; calculating an assist torque based on the driver steering torque in response to performance of a steering assist, from the set initial slope and maximum driver steering torque, and vehicle eigen value information based on a predetermined equation; generating a torque map in which an assist torque value is set based on the driver assist torque upon the performance of the steering assist using assist torque values obtained for each driver steering torque detected by a torque sensor; and determining, by an electronic control unit (ECU), the assist torque value corresponding to the driver steering torque using the generated torque map. 1. A method for determining an assist torque of a power steering system in a vehicle , the method comprising:setting an initial slope indicating a correlation between a driver steering torque and a vehicle lateral acceleration, wherein the initial slope is a tangential slope at a lowest point of the vehicle lateral acceleration defined in a diagram;setting a maximum driver steering torque, which is a maximum value of a steering torque that a driver applies through a steering wheel of the vehicle;calculating an assist torque based on the driver steering torque in response to performance of a steering assist, from the set initial slope and maximum driver steering torque, and vehicle eigen value information based on a predetermined equation;generating a torque map in which an assist torque value is set based on the driver assist torque upon the performance of the steering ...

Подробнее
24-03-2016 дата публикации

ACTIVE FRONT STEERING SYSTEM FOR VEHICLE

Номер: US20160083007A1
Автор: YIM Sun Bin
Принадлежит:

An active front steering (AFS) system for a vehicle may include: a basic pinion angle generation unit configured to generate a basic pinion angle with respect to a steering angle of a driver, using an AFS gear ratio for vehicle speed; a compensating pinion angle detection unit configured to detect a compensating pinion angle which is preset for a steering angle speed; and a basic pinion angle adjusting unit configured to receive the basic pinion angle and the compensating pinion angle from the basic pinion angle generation unit and the compensating pinion angle detection unit, respectively, adjust the basic pinion angle using the compensating pinion angle, and output a final pinion angle. 1. An active front steering (AFS) system for a vehicle , comprising:a basic pinion angle generation unit configured to generate a basic pinion angle with respect to a steering angle of a driver, using an AFS gear ratio for a vehicle speed;a compensating pinion angle detection unit configured to detect a compensating pinion angle which is preset for a steering angle speed; anda basic pinion angle adjusting unit configured to receive the basic pinion angle and the compensating pinion angle from the basic pinion angle generation unit and the compensating pinion angle detection unit, respectively, adjust the basic pinion angle using the compensating pinion angle, and output a final pinion angle.2. The AFS system of claim 1 , wherein the basic pinion angle generation unit generates the basic pinion angle using an AFS gear ratio map for vehicle speed.3. The AFS system of claim 2 , wherein the basic pinion angle increases when the vehicle speed is lowered claim 2 , and decreases when the vehicle speed is raised.4. The AFS system of claim 2 , wherein the basic pinion angle generation unit comprises:a steering angle sensor configured to sense the steering angle of the driver;a vehicle speed sensor configured to sense the vehicle speed;an AFS gear ratio extractor configured to extract an AFS ...

Подробнее
21-03-2019 дата публикации

Work vehicle and control method for work vehicle

Номер: US20190084615A1
Принадлежит: KOMATSU LTD

A work vehicle includes a hydraulic actuator, a hydraulic pump, an operation member, a control valve, an angular velocity corresponding value sensing unit, a notification component, and a controller. The actuator changes a steering angle based on a supplied fluid. The pump supplies fluid to the actuator. The operation member is operated by an operator when the steering angle is changed. The valve controls flow of fluid supplied from the pump to the actuator based on an amount the operation member is operated. The sensing unit senses a corresponding value corresponding to a steering angular velocity changed based on the flow of fluid. The notification component notifies that the corresponding value has reached a threshold value preset based on an upper limit of the steering angular velocity. The controller causes the notification component to perform a notification when it is detected that the corresponding value has reached the threshold value.

Подробнее
05-05-2022 дата публикации

VEHICLE STEERING SYSTEM

Номер: US20220135122A1
Принадлежит:

A steering system for a vehicle is provided. The steering system includes a mechanical interface coupled to an auxiliary hydraulic steering pump and an output of a transmission. In the system, the transmission is mechanically coupled to a motive power source and the auxiliary hydraulic steering pump is hydraulically coupled to a hydraulic steering assembly.

Подробнее
19-03-2020 дата публикации

MACHINE STEERING ANGLE CONTROL SYSTEM

Номер: US20200086911A1
Принадлежит: CATERPILLAR INC.

A machine is disclosed. The machine may comprise a steering device configured to move along a steering position range in response to a force applied on the steering device by a machine operator. The steering device may have at least one soft stop position along the steering position range. The machine may further comprise a biasing member mechanically coupled to the steering device and configured to apply an opposing force that opposes movement of the steering device when the steering device is at or beyond the soft stop position. A magnitude of the opposing force may be sufficiently low such that the machine operator can move the steering device past the soft stop position. The machine may further comprise an electronic control device configured to determine the soft stop position based on one or more operation conditions of the machine. 1. A machine , comprising:a power source;an implement configured to raise and lower a load;ground engagement members configured to turn at a machine steering angle;a steering actuator configured to actuate turning of the ground engagement members to the machine steering angle;a steering device configured to move along a steering position range in response to a force applied on the steering device by a machine operator;a steering position sensor configured to monitor a position of the steering device along the steering position range;a biasing member mechanically coupled to the steering device and configured to apply an opposing force on the steering device that resists movement of the steering device when the steering device is at or beyond a soft stop position along the steering position range, a magnitude of the opposing force being sufficiently low such that the machine operator can move the steering device past the soft stop position; andan electronic control device in communication with the steering actuator, the steering position sensor, and the biasing member, the electronic control device being configured to determine the ...

Подробнее
19-03-2020 дата публикации

CONTROL METHOD OF A REAR WHEEL STEERING SYSTEM

Номер: US20200086914A1
Автор: OH Jun Wook
Принадлежит:

A control method of a rear wheel steering system prevents a sudden change in a rear wheel steering control amount when an error occurs in a wheel speed sensor. The control method detects an error in wheel speed sensors based on output values of the wheel speed sensors. A vehicle speed is estimated by using output values of remaining normal wheel speed sensors except for an output value of an abnormal wheel speed sensor where an error is detected, when an error in the wheel speed sensor is detected. Rear wheels are steered and controlled based on the estimated vehicle speed. 1. A control method of a rear wheel steering system , the control method comprising:detection of an error among four wheel speed sensors by a controller based on output values of the wheel speed sensors;estimation of a vehicle speed using output values of remaining normal wheel speed sensors except for an output value of an abnormal wheel speed sensor where the error is detected, when the controller detects the error in the abnormal wheel speed sensor; andcontrol of steering of rear wheels by the controller based on the estimated vehicle speed,wherein in the estimation of a vehicle speed, when one abnormal wheel speed sensor of the four wheel speed sensors is detected, an output value of the abnormal wheel speed sensor is replaced with an average value of output values of two normal wheel speed sensors except for a remaining normal wheel speed sensor disposed at a position diagonal to the abnormal wheel speed sensor.2. The control method of claim 1 , wherein in the detection of an error claim 1 ,when wheel acceleration output from the wheel speed sensors is equal to or greater than a set value, it is determined that an error has occurred.3. The control method of claim 1 , wherein in the estimation of a vehicle speed claim 1 ,when two abnormal wheel speed sensors of the four wheel speed sensors are detected, an output value of the abnormal wheel speed sensor is replaced with an average value of ...

Подробнее
05-04-2018 дата публикации

POWER STEERING TANK BAFFLE

Номер: US20180093704A1
Принадлежит:

A power steering tank baffle includes a filter member, a hood member and a rib member. The filter member includes an inflow portion and an outflow portion, the inflow portion including a first plurality of openings and a second plurality of openings. The hood member is disposed over the inflow portion. The rib member connects the filter member and the hood member, the rib member being disposed on the inflow portion so as to separate the first plurality of openings and the second plurality of openings. 1. A power steering tank baffle , comprising:a filter member including an inflow portion and an outflow portion, the inflow portion including a first plurality of openings and a second plurality of openings;a hood member disposed over the inflow portion; anda rib member connecting the filter member and the hood member, the rib member being disposed on the inflow portion so as to separate the first plurality of openings and the second plurality of openings.2. The power steering tank baffle of claim 1 , whereinthe outflow portion has a surface area that is greater than a surface area of the inflow portion.3. The power steering tank baffle of claim 1 , whereinthe rib member is configured to direct a first portion of a fluid passing through the first plurality of openings in a first direction and a second portion of the fluid passing through the second plurality of openings in a second direction, the first direction being different from the second direction.4. The power steering tank baffle of claim 1 , whereinthe hood member is disposed such that a radial inner edge of the hood member is disposed radially closer to a center of the filter member than radial inner edges of the first plurality of openings and the second plurality of openings.5. The power steering tank baffle of claim 1 , whereinthe hood member is disposed about 6 mm from the filter member.6. The power steering tank baffle of claim 1 , whereinthe filter member is configured to be disposed within a power ...

Подробнее
12-05-2022 дата публикации

STEERING MECHANISM, VEHICLE, AND APPARATUS AND METHOD FOR PRODUCING STEERING MECHANISM

Номер: US20220144337A1

The present application provides a steering mechanism, a vehicle, and an apparatus and method for producing a steering mechanism, and belongs to the technical field of vehicles. Wherein the steering mechanism comprises a first directive wheel, a second directive wheel, a first driving device, and a second driving device. The first driving device is connected to the first directive wheel; and the second driving device is connected to the second directive wheel. The first driving device and the second driving device are configured to separately drive the first directive wheel and the second directive wheel respectively, thus making the first directive wheel and the second directive wheel deflect in the same direction to achieve steering. No linkage relationship exists between the two directive wheels, whereby the two directive wheels do not need to be connected through a complex mechanical transmission mechanism, and a structure of the steering mechanism is simplified. 1. A steering mechanism , comprising:a first directive wheel;a second directive wheel;a first driving device connected to the first directive wheel; anda second driving device connected to the second directive wheel;wherein the first driving device and the second driving device are configured to separately drive the first directive wheel and the second directive wheel respectively, thus making the first directive wheel and the second directive wheel deflect in the same direction to achieve steering.2. The steering mechanism according to claim 1 , wherein the first driving device comprises:two first hydraulic cylinders distributed at the same side of the first directive wheel at interval, wherein one first hydraulic cylinder is configured to push the first directive wheel, and another first hydraulic cylinder is configured to pull the first directive wheel, thus driving the first directive wheel to deflect.3. The steering mechanism according to claim 2 , wherein the second driving device comprises:two ...

Подробнее
06-04-2017 дата публикации

POWER STEERING DEVICE

Номер: US20170096160A1
Принадлежит: Hitachi Automotive Systems, Ltd.

A steering shaft is constructed by an input shaft , an intermediate shaft connected to the input shaft through a first torsion bar and an output shaft connected to the intermediate shaft through a second torsion bar , and around the input shaft , there is provided a first resolver for detecting a rotation angle of the input shaft and around the intermediate shaft , there is provided a second resolver for detecting a rotation angle of the intermediate shaft , and the first and second resolvers and are arranged to constitute a torque sensor TS that detects a steering torque. 1. A power steering device characterized by having:a steering shaft including an input shaft rotated together with a steering operation of a steering wheel, an intermediate shaft connected to the input shaft through a first torsion bar, and an output shaft connected to the intermediate shaft through a second torsion bar;a housing that rotatably supports the output shaft;a piston slidably received in the housing to part an interior of the housing into first and second pressure chambers;a control valve installed in the housing to selectively feed an operating fluid into the first or second pressure chamber in accordance with a relative rotation between the intermediate shaft and the output shaft, the operating fluid being supplied from an external fluid source;a transmission mechanism through which an axial movement of the piston is transmitted to steered road wheels;a hollow motor including a motor rotor provided on an outer cylindrical surface of the intermediate shaft to make an integral rotation therewith, a motor element including a motor stator arranged about the motor rotor and a motor housing for housing the motor element, the hollow motor controlling the rotation of the input shaft in accordance with an operation condition of an associated motor vehicle;a torque sensor including a first rotation angle sensor for detecting a rotation angle of the input shaft, a second rotation angle sensor ...

Подробнее
26-06-2014 дата публикации

STEERING APPARATUS FOR HEV AND METHOD OF CONTROLLING THE SAME

Номер: US20140180545A1
Автор: Bang Jin Seok
Принадлежит: HYUNDAI MOTOR COMPANY

A steering apparatus for a HEV which assists in providing power steering regardless whether an engine is being operated, and a method of controlling the same. More specifically, one or more detectors detect a vehicle speed, a steering angle, and an engine RPM, and a pump is controlled according to the engine RPM based upon signals received from the one or more detectors. Additionally, an electric motor unit (EMU) mounted to a steering column unit separately from the power steering pump, provides power assisting in steering the vehicle. Also a hybrid control unit (HCU) receives a signal from one or more of the detectors to control a power steering pump and an electric motor unit as required. 1. A steering apparatus of a hybrid electric vehicle , comprising:one or more detectors configured to detect a vehicle speed, a steering angle, and an engine revolutions per minute (RPM);a pump controlled according to the engine RPM, that provides power for steering of a steering wheel;an electric motor unit (EMU) mounted to a steering column unit separately from the power steering pump, the EMU providing power for steering of the steering wheel; anda hybrid control unit (HCU) configured to receive one or more signals from the one or more detectors to control the pump and the electric motor unit based on the signals received,wherein steering power is supplied regardless of whether or not the engine is being operated.2. The steering apparatus of claim 1 , wherein the EMU comprises:a torque/angle sensor installed in the steering column unit, and configured to measure a steering torque and an angle;an electric motor whose torque is controlled by the HCU; anda reduction gear that reduces a rotational speed of the electric motor.3. A method of controlling a steering apparatus of a hybrid electric vehicle claim 1 , the method comprising:determining, by a controller, whether an engine is operating;measuring, by one or more detectors, an engine RPM, a vehicle speed, a steering angle, and ...

Подробнее
16-04-2015 дата публикации

POWER STEERING SYSTEM, VEHICLE EQUIPPED WITH SAME, AND CONTROL METHOD THEREOF

Номер: US20150105980A1
Автор: Iwao Nobuyuki
Принадлежит: Isuzu Motors Limited

Power steering system including: an electric pump to supply fluid to a power steering unit; and an engine control unit (ECU) to control an amount of the fluid by a rotation speed of the electric pump. The ECU includes a first device for calculating an on-slope standby rotation speed and setting the electric pump to this speed when a vehicle is descending or ascending a slope. This speed is calculated by correcting a standby rotation speed of the electric pump corresponding to a vehicle speed with a slope correction value calculated according to a slope angle or a vehicle body angle. Accordingly, it is possible to supply the fluid with the electric pump and assist a steering operation to suppress both a jerky steering feeling due to insufficient steering force in slope descent and a lack of response in the steering operation due to excessive steering force in slope ascent. 1. A power steering system including:an electric pump configured to supply hydraulic oil to a steering assisting device configured to assist a steering performance of a steering wheel; anda control device configured to control a supply amount of the hydraulic oil by rotation speed of the electric pump, whereinthe control device includes a first controller to calculate an on-slope standby rotation speed and to control the electric pump such that the electric pump is set to the on-slope standby rotation speed, when a vehicle is descending or ascending a slope, andwherein the on-slope standby rotation speed is calculated by correcting a standby rotation speed of the electric pump corresponding to a vehicle speed with a slope correction value calculated according to a slope angle or a vehicle body angle.2. The power steering system according to claim 1 , wherein the control device includes a second controller to calculate a steering target rotation speed and to control the electric pump such that the electric pump is set to the steering target rotation speed claim 1 , when the steering wheel is steered ...

Подробнее
23-04-2015 дата публикации

SELF-PROPELLED, PREFERABLY SINGLE AXIS, MOTOR DRIVEN WORK MACHINE FOR MOVING AND/OR DRIVING WORK TOOLS MOUNTED ON THE MACHINE

Номер: US20150107916A1
Автор: Keller Beat
Принадлежит:

A self-propelled single axis motor driven work machine for propelling and/or for driving communal or agricultural work devices mounted on a mounting device. A drive motor is fastened to an undercarriage or machine chassis, and a drive axle protrudes transversely of the direction of movement from both sides of the undercarriage or machine chassis and is hydraulically driven by the drive motor. The drive axle has at both ends a wheel connected to a drive shaft which is connected on the operator's side thereof to the undercarriage and machine chassis with mounted guide rods for manually steering the work machine and for arranging an actuating member for operating and controlling drive units having hydraulic pumps and hydraulic motors, for driving and steering the wheels of the drive axle. The hydraulic pump connected for steering to the actuating member includes an adjusting member which is coupled adjustably to a control shaft that is mounted to a frame that is mounted to the undercarriage or machine chassis so as to be pivotable about an axis approximately perpendicular to the ground. 1. A self-propelled , single axis motor driven work machine for propelling and/or for driving communal or agricultural work devices mounted on a mounting device , comprising: an undercarriage or machine chassis; a drive motor fastened to the undercarriage or machine chassis; a drive axle protruding transversely of a direction of movement of the machine from both sides of the undercarriage or machine chassis and hydraulically driven by the drive motor; a wheel mounted on each end of the drive axle and connected to a drive shaft; mounted guide rods that connect an operator's side of the drive shaft to the undercarriage and machine chassis for manually steering the work machine; drive units having hydraulic pumps and hydraulic motors for driving and steering the wheels of the drive axle; an actuating member mounted on the guide rods for operating and controlling the drive units; a frame ...

Подробнее
23-04-2015 дата публикации

VEHICLE STEERING SYSTEMS

Номер: US20150108746A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A steering system for a vehicle includes a sector shaft defining a bore therein and rotatable about a central longitudinal axis. The steering system also includes a lash adjuster translatable within the bore along the central longitudinal axis. In addition, the steering system includes an end cap cover abutting the lash adjuster and spaced apart from the sector shaft to define a first cavity between the end cap cover and the sector shaft, and a housing abutting the end cap cover and spaced apart from the sector shaft to define a second cavity between the housing and the sector shaft. The steering system also includes a seal surrounding and abutting the sector shaft, wherein the seal separates the first cavity from the second cavity. 1. A steering system for a vehicle , the steering system comprising:a sector shaft defining a bore therein and rotatable about a central longitudinal axis;a lash adjuster translatable within the bore along the central longitudinal axis;an end cap cover abutting the lash adjuster and spaced apart from the sector shaft to define a first cavity between the end cap cover and the sector shaft;a housing abutting the end cap cover and spaced apart from the sector shaft to define a second cavity between the housing and the sector shaft; anda seal surrounding and abutting the sector shaft, wherein the seal separates the first cavity from the second cavity.2. The steering system of claim 1 , wherein the first cavity is not disposed in fluid communication with the second cavity.3. The steering system of claim 2 , wherein the end cap cover defines an annular channel therein claim 2 , and further wherein the seal is disposed within the annular channel.4. The steering system of claim 2 , wherein the sector shaft has a proximal end defining the bore therein claim 2 , and a distal end spaced apart from the proximal end along the central longitudinal axis.5. The steering system of claim 4 , further including a fluid disposed in contact with the sector ...

Подробнее
04-04-2019 дата публикации

Hydraulic unit, method for operating a hydraulic unit, and steering system

Номер: US20190100240A1
Принадлежит: Weber Hydraulik GmbH Germany

A hydraulic unit for supplying pressure to a hydraulic steering system is provided having at least two hydraulic cylinders and at least one hydraulic pump ( 9, 10, 32, 33 ). It is essential that the hydraulic cylinders are of interacting configuration, by an annular space ( 6 a, 6 a, 28 a, 28 b ) of the first hydraulic cylinder being connected via at least one hydraulic line to an annular space ( 6 a, 6 a, 28 a, 28 b ) of the second hydraulic cylinder, and a piston space ( 5 a, 5 b, 29 a, 29 b ) of the first hydraulic cylinder being connected via at least one hydraulic line to a piston space ( 5 a, 5 b, 29 a, 29 b ) of the second hydraulic cylinder, and a hydraulic pump ( 9, 10, 32, 33 ) being arranged at least in a hydraulic line ( 7, 8, 30, 31 ) between the two annular spaces ( 6 a, 6 a, 28 a, 28 b ) or in a hydraulic line ( 7, 8, 30, 31 ) between the two piston spaces ( 5 a, 5 b, 29 a, 29 b ). Furthermore, the invention relates to methods for operating a hydraulic unit for supplying pressure to a hydraulic steering system, and to a steering system.

Подробнее
21-04-2016 дата публикации

STEERING SYSTEM WITH MAGNETIC TORQUE OVERLAY

Номер: US20160107681A1
Принадлежит:

A steering system with magnetic torque overlay of a vehicle is provided. The system comprises a hydraulic valve and differential-pressure transducer that monitors pressure created by the valve due to torque exerted by a driver of the vehicle in various directions on a steering wheel thereof. The transducer is fastened to a recirculating ball steering gear. A magnetic actuator generates an output of torque required from the steering gear for a maneuver of the steering wheel and applies the torque to the valve independently of input by the driver. A permanent magnet is located proximate the actuator. A control module calculates an appropriate amount of electric current and sends it to the actuator to generate the output torque. The torque is added to or subtracted from the system in any of the directions independently of the driver input by the pressure-monitoring and inputs from the vehicle into the control module. 1. A power-steering system comprising:a hydraulic valve;a differential-pressure transducer configured to monitor pressure exerted by a driver of a vehicle in various directions on a steering wheel thereof;a recirculating ball steering gear to which the transducer is configured to be fastened; anda magnetic actuator configured to generate an output of torque required from the recirculating ball steering gear for a maneuver of the steering wheel and apply the torque to the hydraulic valve independently of input by the driver.2. The steering system of claim 1 , wherein the steering system further comprises a control-valve assembly mounted in the recirculating ball steering gear.3. The steering system of claim 1 , wherein the magnetic actuator includes an electromagnetic coil claim 1 , an inner and outer electromagnetic pole claim 1 , and at least one permanent magnet assembly.4. The steering system of claim 3 , wherein the steering system further comprises a valve housing configured to house the magnetic actuator and the hydraulic valve and the coil claim 3 , ...

Подробнее
21-04-2016 дата публикации

HYDRAULIC SYSTEM OF A VEHICLE

Номер: US20160108938A1
Автор: Christensen Carsten
Принадлежит:

A hydraulic system of a vehicle is provided, said system including: a first hydraulic circuit () having a first pressure source () and at least a first hydraulic consumer (), a second hydraulic circuit () having a second pressure source () and at least a second hydraulic consumer (), connecting means () allowing a flow of hydraulic fluid at least from said first hydraulic circuit () to said second hydraulic circuit (), and control means () for controlling operation of said hydraulic consumers (). Such a hydraulic system should allow safe operation of a vehicle with low energy consumption of the hydraulic system. To this end said control means () are connected to summation demand means (), said summation demand means () controlling flow of hydraulic fluid from at least said first hydraulic circuit () to said second hydraulic circuit (), said summation demand means () being connected to operation mode signal means () outputting an operation mode signal indicative of an operation mode of said vehicle, wherein said summation demand means () allow or block flow of hydraulic fluid from one hydraulic circuit () to another hydraulic circuit () in dependency of said operation mode signal. 1. A hydraulic system of a vehicle , said system comprising:a first hydraulic circuit having a first pressure source and at least a first hydraulic consumer, a second hydraulic circuit having a second pressure source and at least a second hydraulic consumer, connecting means allowing a flow of hydraulic fluid at least from said first hydraulic circuit to said second hydraulic circuit, and control means for controlling operation of said hydraulic consumers, wherein said control means are connected to summation demand means, said summation demand means controlling flow of hydraulic fluid from at least said first hydraulic circuit to said second hydraulic circuit, said summation demand means being connected to operation mode signal means outputting an operation mode signal indicative of an ...

Подробнее
19-04-2018 дата публикации

WORK VEHICLE

Номер: US20180105202A1
Принадлежит:

A work vehicle is articulated with a front frame and a rear frame linked to the front frame. The work vehicle includes a hydraulic actuator, a control valve, an operation member and a force imparting component. The hydraulic actuator is configured to be hydraulically driven to change a steering angle of the front frame with respect to the rear frame. The control valve is configured to control flow of fluid supplied to the hydraulic actuator. The operation member is linked to the control valve and configured to be operated by an operator. The force imparting component is configured to impart an assist force or a counterforce to an operation of the operation member. 1. A work vehicle , the work vehicle being articulated with front frame and a rear frame linked to the front frame , the work vehicle comprising:a hydraulic actuator configured to be hydraulically driven to change a steering angle of the front frame with respect to the rear frame;a control valve configured to control flow of fluid supplied to the hydraulic actuator;an operation member linked to the control valve and configured to be operated by an operator; anda force imparting component configured to impart an assist force or a counterforce to an operation of the operation member.2. The work vehicle according to claim 1 , further comprisinga link linking the operation member and the control valve,the force imparting component further including a transmission mechanism configured to transmit the assist force or counterforce to the link.3. The work vehicle according to claim 1 , whereinthe force imparting component includes an electric motor as a drive source thereof.4. The work vehicle according to claim 3 , further comprisinga torque sensor configured to sense torque produced by operation of the operation member; anda controller configured to control the electric motor based on a sensed value of the torque sensor.5. The work vehicle according to claim 1 , wherein a first input member linked to the ...

Подробнее
19-04-2018 дата публикации

WORK VEHICLE AND METHOD FOR CONTROLLING WORK VEHICLE

Номер: US20180105203A1
Принадлежит:

An articulated work vehicle with linked front and rear frames includes a joystick lever, a force imparting component, and a controller. The joystick lever can be moved to an inside or an outside with respect to an operator's seat by being operated by an operator, to change a steering angle of the front frame with respect to the rear frame. The force imparting component is configured to impart an assist force or a counterforce to an operation of the joystick lever by the operator. The controller controls the force imparting component so that an operating force required to move the joystick lever to the outside is different from an operating force required to move the joystick lever to the inside. 1. A work vehicle , the work vehicle being articulated with a front frame and a rear frame linked to the front frame , the work vehicle comprising:a joystick lever configured to be moved to an inside or an outside with respect to an operator's seat by being operated by an operator, to change a steering angle of the front frame with respect to the rear frame;a force imparting component configured to impart an assist force or a counterforce to an operation of the joystick lever by the operator; anda controller configured to control the force imparting component so that an operating force required to move the joystick lever to the outside is different from an operating force required to move the joystick lever to the inside.2. The work vehicle according to claim 1 , whereinthe controller is further configured to control the force imparting component so that the operating force required to move the joystick lever to the outside is less than the operating force required to move the joystick lever to the inside.3. The work vehicle according to claim 1 , further comprising:a torque sensor configured to sense torque produced by operation of the joystick lever,the controller being further configured to control the force imparting component so that an assist force or a counterforce is ...

Подробнее
20-04-2017 дата публикации

TURNING DEVICE FOR A STEERED WHEEL OF A ROLLING MACHINE

Номер: US20170106893A1
Принадлежит:

The invention relates to a turning device for a steered wheel of a rolling machine, the device including: 1. A turning device for a steered wheel of a rolling machine , the device including:{'b': '20', 'a yoke (),'}{'b': 10', '11', '300', '11', '13, 'an assembly () for mounting the steered wheel, including an end piece () intended to be attached to the steered wheel, and an intermediate connecting member (), relatively to which the end piece () is mounted so as to rotate around a first axis () of rotation of the steered wheel,'}{'b': 12', '23', '20', '23', '13, 'a support () pivotally mounted around a second axis () of rotation relatively to the yoke () according to a turning angle (ANG) of the wheel, the second axis () of rotation being distinct and not parallel to the first axis () of rotation of the steered wheel,'}{'b': '30', 'a turning angle sensor (),'}{'b': 12', '20', '300', '12', '20, 'one from among the support () and the yoke () being attached to the intermediate connecting member () and the other one from among the support () and the yoke () being intended to be attached to a fixed portion (C, E) of the rolling machine,'}{'b': 30', '20', '12, 'characterized in that the turning angle sensor () is a contactless sensor between the yoke () and the support (),'}{'b': 300', '11', '13, 'the intermediate connecting member () containing a motor for setting the end piece () into rotation around the first axis () of rotation.'}230. The device according to claim 1 , wherein the turning angle sensor () is magnetic.330313231. The device according to any one of the preceding claims claim 1 , wherein the turning angle sensor () includes a first target module () capable of generating a first physical quantity varying with the turning angle (ANG) claim 1 , and a second detection module () for detecting the physical quantity of the first module () claim 1 , varying with the turning angle (ANG) claim 1 ,{'b': 31', '20', '12', '32', '20', '12, 'the first target module () ...

Подробнее
20-04-2017 дата публикации

Steering motor

Номер: US20170106901A1
Автор: Shugang Gong

Disclosed is a steering motor, comprising a spring damping valve, and an oil distributor which is fitted with the spring damping valve to form a cavity in which a buffering assembly is provided. A cylinder assembly is provided on a lower side of the oil distributor, and comprises a cylinder, an elastic oil bag provided in the cylinder, and a piston which is provided in the cylinder and fixedly connected to the elastic oil bag, the piston being capable of sliding axially along the cylinder. In addition, the oil distributor is further provided with an oil flow passage; the spring damping valve protrudes out of a hollow column having an inner cavity; a directional control valve having a valve core is inserted in the cavity of the hollow column; the hollow column is further provided with an oil flow port in communication with the oil flow passage; an oil inlet groove is provided on and in communication with the oil flow port; and the valve core protrudes into the hollow column and is fitted with the oil flow port and the oil inlet groove. The steering motor adopts an oil passage combination design to simplify the structure, and also adopts the elastic oil bag to reduce the frictional wear of a shock absorption mechanism, so as to prolong the service life of steering motor and reduce the costs.

Подробнее
18-04-2019 дата публикации

Power steering apparatus

Номер: US20190111965A1
Автор: Tatsuo Matsumura
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

A power steering apparatus includes a steering shaft 10 including an input shaft 11, an intermediate shaft 13 connected through a first torsion bar 12 to the input shaft, and an output shaft 15 connected through a second torsion bar 14 to the intermediate shaft; a hollow motor 30 to provide a rotational force to the intermediate shaft; and a control device 60 including a microcomputer, and including an output shaft rotation angle presuming section 63 to presume an output shaft rotation angle θg based on signals of an input shaft rotation angle θh and an intermediate shaft rotation angle θm, a torsion spring constant g1 and g2 of the first and second torsion bars; and a motor drive control section 69 to control the hollow motor based on the output shaft rotation angle.

Подробнее
25-08-2022 дата публикации

HYDRAULIC STEERING DEVICE FOR AGRICULTURAL WORK VEHICLE

Номер: US20220264785A1
Автор: Lee Sang Heon
Принадлежит:

The present disclosure relates to a hydraulic steering device for an agricultural work vehicle comprising a steering pump for supplying working fluid; an automatic steering unit which is connected to the steering pump, and which changes, according to automatic steering performed by a control part, the traveling direction of the agricultural work vehicle by using the working fluid supplied from the steering pump; a manual steering unit which is connected to each of the steering pump and the automatic steering unit, and which changes, according to manual steering performed by the operation of a steering wheel, the traveling direction of the agricultural work vehicle, and a manual switching unit connected to each of the steering pump and the manual steering unit. 1. A hydraulic steering device for an agricultural vehicle , the hydraulic steering device comprising:a steering pump configured to supply a working fluid;an automatic steering unit connected to the steering pump and configured to, as automatic steering is performed by a controller, use the working fluid supplied from the steering pump to change a traveling direction of the agricultural vehicle;a manual steering unit connected to each of the steering pump and the automatic steering unit and configured to, as manual steering is performed by manipulation of a steering wheel, change the traveling direction of the agricultural vehicle; anda manual changing unit connected to each of the steering pump and the manual steering unit,wherein the manual steering unit is connected to the steering pump through the manual changing unit,the manual changing unit blocks passage of the working fluid supplied from the steering pump when the automatic steering is performed in a state in which the manual steering is not performed and causes the working fluid supplied from the steering pump to pass when the automatic steering is not performed in the state in which the manual steering is not performed or when the manual steering is ...

Подробнее
05-05-2016 дата публикации

PRESSURE SENSOR AUTOTRIM ALGORITHM

Номер: US20160124442A1
Автор: Birsching Joel E.
Принадлежит:

A hydraulic steering system estimates a trim value from at least a backpressure sensed on a valve assembly in a steering gear. The system further applies the trim value to the pressure measurements of the valve assembly in the steering gear. 1. A hydraulic steering system comprising:an estimation module that estimates a trim value from at least an instantaneous backpressure value sensed on a valve assembly in a steering gear; anda compensation module that applies the trim value to pressure measurements sensed on the valve assembly.2. The system of claim 1 , wherein the instantaneous backpressure value is determined by comparing two values sampled from at least two channels connected to opposing sides of the valve assembly.3. The system of claim 1 , wherein the pressure measurements include a subsequent instantaneous system pressure value and a subsequent instantaneous backpressure value.4. The system of claim 1 , wherein the estimation module estimates the trim value by comparing the subsequent instantaneous backpressure value to an average backpressure value computed over time.5. The system of claim 4 , wherein the average backpressure is computed by averaging a plurality of backpressure values claim 4 , wherein the plurality of backpressure values includes backpressure values from the at least two channels connected to opposing sides of the valve assembly.6. The system of claim 4 , wherein the comparing comprises determining a difference between the instantaneous backpressure value and the average backpressure value.7. The system of claim 6 , wherein the difference is integrated to provide a trim value.8. The system of claim 7 , wherein the trim value is added to a subsequent instantaneous backpressure value if the instantaneous backpressure value is less than the average backpressure value.9. The system of claim 8 , wherein the trim value is subtracted from a subsequent instantaneous backpressure value if the instantaneous backpressure value is greater than the ...

Подробнее
03-05-2018 дата публикации

SYSTEMS AND METHODS FOR CONTROLLING AIRFLOW THROUGH A POWER STEERING SYSTEM

Номер: US20180119595A1
Принадлежит:

Methods and systems are provided for preventing overheating of a power steering system. In one example, a method includes operating an engine cooling fan based on a steering wheel angle and an engine speed. The cooling fan may be operated for a duration based on the steering wheel angle and engine speed, thus eliminating the need for a dedicated power steering coolant temperature sensor. 1. A method comprising:adjusting operation of an engine cooling fan based on an engine speed and a steering wheel angle; andoperating the engine cooling fan for a duration.2. The method of claim 1 , wherein adjusting operation of an engine cooling fan based on an engine speed comprises adjusting operation of the engine cooling fan based on an engine speed greater than an engine speed threshold for a first predetermined duration.3. The method of claim 2 , wherein adjusting operation of an engine cooling fan based on a steering wheel angle comprises adjusting operation of the engine cooling fan based on a steering wheel angle greater than a steering wheel angle threshold for the first predetermined duration.4. The method of claim 3 , further comprising:reducing an engine speed based on an engine speed greater than the engine speed threshold for a second predetermined duration, longer than the first predetermined duration, and further based on a steering wheel angle being greater than the steering wheel angle threshold for the second predetermined duration.5. The method of claim 4 , wherein reducing an engine speed comprises reducing an engine speed to a first predetermined engine speed claim 4 , less than the threshold engine speed.6. The method of claim 5 , further comprising:following reducing engine speed to the first predetermined engine speed, reducing engine speed to an intermediate predetermined engine speed, lower than the first predetermined engine speed based on a steering wheel angle being greater than the steering wheel angle threshold for an intermediate predetermined ...

Подробнее
25-08-2022 дата публикации

HYDRAULIC STEERING DEVICE OF AGRICULTURAL WORK VEHICLE

Номер: US20220266897A1
Принадлежит:

The present disclosure relates to a hydraulic steering device of an agricultural work vehicle comprising a steering pump for supplying a working fluid; an automatic steering unit which uses the working fluid to change the traveling direction of the agricultural work vehicle when automatic steering is performed by a control unit; a manual steering unit which uses the working fluid to change the traveling direction of the agricultural work vehicle when manual steering is performed by operating a steering handle; and an automatic cut-off unit which is for selectively cutting off the supply of the working fluid for the automatic steering to a steering cylinder of the agricultural work vehicle according to whether the manual steering is performed. 1. A hydraulic steering device for an agricultural vehicle , the hydraulic steering device comprising:a steering pump configured to supply a working fluid;an automatic steering unit connected to the steering pump and configured to, as automatic steering is performed by a controller, use the working fluid supplied from the steering pump to change a traveling direction of the agricultural vehicle;a manual steering unit connected to the steering pump and configured to, as manual steering is performed by manipulation of a steering wheel, use the working fluid supplied from the steering pump to change the traveling direction of the agricultural vehicle; andan automatic blocking unit connected to the automatic steering unit and configured to, according to whether the manual steering is performed, selectively block a working fluid for the automatic steering from being supplied to a steering cylinder of the agricultural vehicle,wherein the automatic blocking unit allows the working fluid for the automatic steering to be supplied to the steering cylinder but, when the manual steering is performed, uses a portion of the working fluid supplied from the steering pump to the manual steering unit to block the working fluid for the automatic ...

Подробнее
25-08-2022 дата публикации

Augmented Rack and Pinion Steering System

Номер: US20220266899A1
Автор: Bandy Ronald S.
Принадлежит:

The present invention is an improved version of the steering system described in U.S. patent application Ser. No. 17/115,573. The prior steering system features effortless steering input from the driver and negligible bumpsteer during suspension operation. Such extraordinary steering performance is realized with the use of costly and complex electric assist devices and control devices. The present steering system includes an alternative electric assist device which allows for the removal of the costly and complex electric assist devices in the prior steering system. The present steering system also includes a novel hydraulic control valve with a solenoid valve-plunger mechanism. The mechanism prevents premature wear or destruction of the rack and pinion gearset. The use of the alternative electric assist device and hydraulic control valve enables the present steering system to preserve the extraordinary steering performance featured in the prior steering system concurrent with a reduction in cost and complexity. 1. A steering system for a vehicle comprising:an electric assist steering column, wherein the electric assist steering column multiplies a steering input torque;an augmented chain and sprocket assembly having an input shaft and an output shaft, the input shaft is coupled to the electric assist steering column, and wherein the augmented chain and sprocket assembly multiplies a steering input rotational speed;a steering shaft coupled to the output shaft of the augmented chain and sprocket assembly;a rack and pinion gearset having a pinion and a rack, the pinion is coupled to the steering shaft, wherein the pinion shaft exerts the multiplied steering input torque at the multiplied steering input rotational speed to the rack to displace the rack linearly at a rack and pinion gearset slow steering ratio;a steering wheel attached to the electric assist steering column to receive a steering input having the steering input rotational torque and the steering input ...

Подробнее
16-04-2020 дата публикации

HYDRAULIC STEERING ARRANGEMENT

Номер: US20200114954A1
Автор: Rahimzai Abdul Karim
Принадлежит:

A hydraulic steering arrangement () is described comprising a supply port arrangement (P, T) having a pressure port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path () having a main orifice (A), at least one further orifice (A, A, A) downstream the main orifice (A), and a measuring motor (), the main flow path () being arranged between the pressure port (P) and the working port arrangement (L, R), a return flow path () arranged between the working port arrangement (L, R) and the tank port (T), an amplification flow path () having an amplification orifice (A) and being arranged between the pressure port (P) and the working port arrangement (L, R), and an adjustable pressure source () connected to the pressure port (P) and having a load sensing port (), wherein a main drain orifice (A) is connected between the main flow path () downstream the main orifice (A) and the return flow path (). It should be possible to operate such a steering arrangement with a dynamic flow. To this end a flow divider () connects the load sensing port () with the main flow path () downstream the main orifice (A) and the amplification flow path () downstream the amplification orifice (A). 1. A hydraulic steering arrangement comprising a supply port arrangement (P , T) having a pressure port (P) and a tank port (T) , a working port arrangement having two working ports (L , R) , a main flow path having a main orifice (A) , at least one further orifice (A , A , A) downstream the main orifice (A) , and a measuring motor , the main flow path being arranged between the pressure port (P) and the working port arrangement (L , R) , a return flow path arranged between the working port arrangement (L , R) and the tank port (T) , an amplification flow path having an amplification orifice (A) and being arranged between the pressure port (P) and the working port arrangement (L , R) , and an adjustable pressure source connected to the pressure port (P) ...

Подробнее
16-04-2020 дата публикации

HYDRAULIC STEERING ARRANGEMENT

Номер: US20200114955A1
Принадлежит:

A hydraulic steering arrangement () comprising a supply port arrangement having a pressure port and a tank port, a working port arrangement having two working ports (L, R), a mechanical steering unit () connected to a steering wheel () and being arranged between the supply port arrangement and the working port arrangement (L, R), supply valve means () having a connection to the pressure port and to the working port arrangement (L, R) and being controlled by a controller (), and a steering wheel sensor () connected to the controller () is described. Such a steering arrangement could allow a comfortable feeling for the driver. To this end the steering wheel sensor () is mounted in a position of minimum play to steering wheel () and steering wheel sensor () and detects a beginning of a movement of the steering wheel (), wherein the controller () actuates the supply valve means () upon beginning of the movement, and the supply valve means () supply hydraulic fluid to the working port arrangement (L, R). 1. A hydraulic steering arrangement comprising a supply port arrangement having a pressure port and a tank port , a working port arrangement having two working ports (L , R) , a mechanical steering unit connected to a steering wheel and being arranged between the supply port arrangement and the working port arrangement (L , R) , supply valve means having a connection to the pressure port and to the working port arrangement (L , R) and being controlled by a controller , and a steering wheel sensor connected to the controller , wherein the steering wheel sensor is mounted in a position of minimum play between steering wheel and steering wheel sensor and detects at least a beginning of a movement of the steering wheel , wherein the controller actuates the supply valve means upon beginning of the movement , and the supply valve means supply hydraulic fluid to the working port arrangement (L , R).2. The hydraulic steering arrangement according to claim 1 , wherein the supply ...

Подробнее
16-04-2020 дата публикации

HYDRAULIC STEERING ARRANGEMENT

Номер: US20200114956A1
Автор: Rahimzai Abdul Karim
Принадлежит:

A hydraulic steering arrangement is described comprising a supply port arrangement having a pressure port () and a tank port (), a working port arrangement having two working ports (), a steering unit () arranged in a flow path () between the supply port arrangement () and the working port arrangement (), and a second flow path () in form of an amplification flow path bridging the steering unit () and having an amplification orifice (A) which is controlled as function of the steering unit (). Such a steering arrangement should have a possibility to change the steering behaviour. To this end at least a third flow path () in form of an amplification flow path is arranged in parallel to the second flow path (), wherein the second/or the third flow path () comprise an valve (). 1. A hydraulic steering arrangement comprising a supply port arrangement having a pressure port and a tank port , a working port arrangement having two working ports , a steering unit arranged in a first flow path between the supply port arrangement and the working port arrangement , and a second flow path in form of an amplification flow path bridging the steering unit and having an amplification orifice (A) which is controlled as a function of the steering unit , wherein at least a third flow path in form of an amplification flow path is arranged in parallel to the second flow path , wherein the second and/or the third flow path comprise a valve.2. The hydraulic steering arrangement according to claim 1 , wherein the valve is an on/off-valve.3. The hydraulic steering arrangement according to claim 1 , wherein the valve is a remotely controlled valve.4. The hydraulic steering arrangement according to claim 3 , wherein the valve is an electrically controlled valve.5. The hydraulic steering arrangement according to claim 1 , wherein the valve is a pulse width modulated valve.6. The hydraulic steering arrangement according to claim 1 , wherein the second and the third flow paths have different ...

Подробнее
25-04-2019 дата публикации

MANUALLY ADJUSTABLE POPPET VALVES FOR A POWER ASSIST STEERING GEAR

Номер: US20190120259A1
Автор: Schoon Benjamin W.
Принадлежит:

A steering gear includes a housing defining a chamber. A piston divides the chamber into first and second chamber portions. The piston is moveable along a linear axis relative to the housing upon pressurization of fluid in one of the first and second chamber portions. A pressure relief vents pressurized fluid from one of the first and second chamber portions to one other of the first and second chamber portions upon movement of the piston to a predetermined position. The pressure relief assembly includes a first valve at a first end of the pressure relief assembly and a second valve at a second end of the pressure relief assembly. The pressure relief assembly is axially movable relative to the piston to adjust the position of the first valve and the second valve relative to the piston. 1. A steering gear comprising:a housing defining a chamber;a piston dividing the chamber into first and second chamber portions, the piston being moveable along a linear axis relative to the housing upon pressurization of fluid in one of the first and second chamber portions; anda pressure relief assembly for venting pressurized fluid from one of the first and second chamber portions to one other of the first and second chamber portions upon movement of the piston to a predetermined position, the pressure relief assembly including a first valve at a first end of the pressure relief assembly and a second valve at a second end of the pressure relief assembly, the pressure relief assembly being axially movable relative to the piston to adjust the position of the first valve and the second valve relative to the piston.2. The steering gear of claim 1 , wherein the pressure relief assembly includes a sleeve extending into the piston claim 1 , and wherein each of the first valve and the second valve is a poppet valve having a valve seat and a valve member extending through the valve seat.3. The steering gear of claim 2 , wherein the sleeve is movable relative to the piston claim 2 , and ...

Подробнее
27-05-2021 дата публикации

STEERING DEVICE, STEERING SYSTEM, AND WORK VEHICLE

Номер: US20210156117A1
Принадлежит:

A steering device for operating a work vehicle includes a support part, a base member rotatably supported by the support part, a lever rotatably supported by the support part or the base member, a biasing member and a transmission mechanism connecting part. The biasing member is interposed between the lever and the base member to bias the lever to a predetermined position with respect to the base member. The transmission mechanism connecting part configured to be connected to a transmission mechanism configured to transmit rotation based on a rotation angle of a steering shaft of the work vehicle to the base member. A restriction part may restrict rotation of the lever when an angle of the lever with respect to the base member reaches a predetermined angle. 1. A steering device for operating a work vehicle , the steering device comprising:a support part;a base member rotatably supported by the support part;a lever rotatably supported by the support part or the base member;a biasing member interposed between the lever and the base member, the biasing member being configured to bias the lever to a predetermined position with respect to the base member; anda transmission mechanism connecting part configured to be connected to a transmission mechanism including a link, the transmission mechanism being configured to transmit rotation based on a rotation angle of a steering shaft of the work vehicle to the base member.2. The steering device according to claim 1 , further comprising:a first lever angle sensor configured to detect a rotation angle of the lever with respect to the support part, anda vehicle body steering angle sensor configured to detect the rotation angle of the steering shaft of the work vehicle.3. The steering device according to claim 1 , further comprising:a second lever angle sensor configured to detect a rotation angle of the lever with respect to the base member.4. A steering system including the steering device according to claim 2 , the steering ...

Подробнее
12-05-2016 дата публикации

METHOD OF CONTROLLING STEERING OF A GROUND VEHICLE

Номер: US20160129936A1
Принадлежит:

A method of controlling steering of a vehicle through setting wheel angles of a plurality of modular electronic corner assemblies (eModules) is provided. The method includes receiving a driving mode selected from a mode selection menu. A position of a steering input device is determined in a master controller. A velocity of the vehicle is determined, in the master controller, when the determined position of the steering input device is near center. A drive mode request corresponding to the selected driving mode to the plurality of steering controllers is transmitted to the master controller. A required steering angle of each of the plurality of eModules is determined, in the master controller, as a function of the determined position of the steering input device, the determined velocity of the vehicle, and the selected first driving mode. The eModules are set to the respective determined steering angles. 1. A method of controlling steering of a vehicle through setting wheel angles of a plurality of modular electronic corner assemblies (eModules) , the method comprising:activating a driver interface device;receiving a selected first driving mode selected from the driver interface device;determining, by a master controller, when a brake pedal is activated; andtransmitting a first drive mode request corresponding to the selected first driving mode to a plurality of steering controllers when the brake pedal is determined to be activated;wherein each of the plurality of steering controllers corresponds to a respective one of the plurality of eModules.2. A method claim 1 , as set forth in claim 1 , further comprising:determining a position of a steering input device;determining, in the master controller, a required steering angle of each of the plurality of eModules as a function of the determined position of the steering input device and the selected first driving mode; andsetting the eModules to the respective determined steering angles.3. A method claim 2 , as set ...

Подробнее
14-05-2015 дата публикации

METHOD OF CONTROLLING STEERING OF A GROUND VEHICLE

Номер: US20150134202A1
Принадлежит:

A method of controlling steering of a vehicle through setting wheel angles of a plurality of modular electronic corner assemblies (eModules) is provided. The method includes receiving a driving mode selected from a mode selection menu. A position of a steering input device is determined in a master controller. A velocity of the vehicle is determined, in the master controller, when the determined position of the steering input device is near center. A drive mode request corresponding to the selected driving mode to the plurality of steering controllers is transmitted to the master controller. A required steering angle of each of the plurality of eModules is determined, in the master controller, as a function of the determined position of the steering input device, the determined velocity of the vehicle, and the selected first driving mode. The eModules are set to the respective determined steering angles. 1. A method of controlling steering of a vehicle through setting wheel angles of a plurality of modular electronic corner assemblies (eModules) , the method comprising:receiving a driving mode selected from a mode selection menu;determining, in a master controller, a position of a steering input device;determining, in the master controller, a velocity of the vehicle when the determined position of the steering input device is near center;transmitting a drive mode request corresponding to the driving mode to a plurality of steering controllers;determining, in the master controller, a required steering angle of each of the plurality of eModules as a function of the determined position of the steering input device, the determined velocity of the vehicle, and the driving mode; andsetting the eModules to the respective determined steering angles.2. A method claim 1 , as set forth in claim 1 , wherein determining claim 1 , in the master controller claim 1 , a required steering angle is further defined as:setting each of the eModules to an angle of 0 degrees when the ...

Подробнее
23-04-2020 дата публикации

CONTROL DEVICE FOR UNMANNED VEHICLE AND CONTROL METHOD FOR UNMANNED VEHICLE

Номер: US20200125108A1
Принадлежит:

A control device for an unmanned vehicle includes a temperature data acquisition unit acquiring temperature data of hydraulic oil supplied to a first hydraulic actuator actuating a steering device of the unmanned vehicle, and a command output unit outputting a change command for changing a travel parameter of the unmanned vehicle based on the temperature data. 1. A control device for an unmanned vehicle comprising:a temperature data acquisition unit acquiring temperature data of hydraulic oil supplied to a first hydraulic actuator actuating a steering device of the unmanned vehicle; anda command output unit outputting a change command for changing a travel parameter of the unmanned vehicle based on the temperature data.2. The control device for an unmanned vehicle according to claim 1 , whereinthe travel parameter includes limiting travel speed of the unmanned vehicle, andthe command output unit changes the limiting travel speed based on the temperature data.3. The control device for an unmanned vehicle according to claim 2 , comprisinga maximum steering speed calculation unit calculating maximum steering speed of the steering device based on the temperature data,wherein the command output unit changes the limiting travel speed based on the maximum steering speed.4. The control device for an unmanned vehicle according to claim 3 , comprisinga storage unit storing correlation data between a temperature of the hydraulic oil and the maximum steering speed of the steering device,wherein the maximum steering speed calculation unit calculates the maximum steering speed based on the temperature data and the correlation data.5. The control device for an unmanned vehicle according to claim 3 , comprisinga steering speed data calculation unit calculating steering speed data of the steering device of when the hydraulic oil is supplied to the first hydraulic actuator at a maximum flow rate,wherein the maximum steering speed calculation unit calculates the maximum steering speed ...

Подробнее
18-05-2017 дата публикации

Steering system and independent suspension wheel-type heavy vehicle

Номер: US20170137058A1
Принадлежит: Xuzhou Heavy Machinery Co Ltd

The present invention relates to a steering system and an independent suspension wheel-type heavy vehicle. The steering system comprises a steering mechanism for providing a steering force to wheels and a steering hydraulic assisting system for providing a steering assisting force overcoming a steering resistance moment from the ground to the wheels. According to the invention, by providing the steering mechanism for providing a steering force to wheels and by providing the steering hydraulic assisting system for providing a steering assisting force overcoming a steering resistance moment from the ground to the wheels, the steering resistance moment from the ground can be effectively overcome, and the vehicle is offered the steering capability for various places, as compared with a steering system only depending on the torque output by a steering gear or only depending on the torque output by the steering gear and a steering assisting follower.

Подробнее
14-08-2014 дата публикации

HYDRAULIC-POWER STEERING SYSTEM WITH MAGNETIC TORQUE OVERLAY

Номер: US20140224565A1
Автор: Birsching Joel E.

A hydraulic-power steering system is provided. A power-steering valve controls and varies a level of steering assist. A magnetic actuator varies torsional stiffness of the valve to change torque and produce a sufficient amount of the torque to generate full assist. A first valve is operatively connected to a steering pump and allows the full assist at a relatively low steering torque and through which flow from the steering pump is directed. A second valve is operatively connected to the steering pump. Current is applied to a solenoid valve that allows an increasing amount of the flow to be directed through the second valve in response to an input signal of increasing vehicle speed above a threshold value and closes in response to a signal identifying any of a plurality of advanced steering functions. 1. A hydraulic-power steering system comprising:a power-steering valve that is configured to control and vary a level of steering assist;a magnetic actuator that is configured to vary torsional stiffness of the power-steering valve to change torque and produce a sufficient amount of the torque to generate full assist;a steering pump;a first valve that is operatively connected to the steering pump and allows the full assist at a relatively low steering torque and through which flow from the steering pump is directed;a second valve that is operatively connected to the steering pump; anda solenoid valve to which current is applied and that allows an increasing amount of the flow to be directed through the second valve in response to an input signal of increasing vehicle speed above a threshold value and closes in response to a signal identifying any of a plurality of advanced steering functions.2. The steering system of claim 1 , wherein the advanced steering function is park-assist.3. The steering system of claim 1 , wherein the power-steering valve is configured as a parallel valve.4. The steering system of claim 1 , wherein the power-steering valve defines an annular ...

Подробнее
24-05-2018 дата публикации

Steering Apparatus for Steer by Wire System

Номер: US20180141585A1
Принадлежит:

A steering apparatus for a steer by wire system includes a first motor and a second motor configured to provide a torque. A first planetary gear set is configured to receive the torque from the first motor and to generate a reaction torque required for steering. A second planetary gear set is configured to receive the torque from the steering wheel and the second motor, and to variably output a gear ratio for an input by the steering wheel depending on a rotation of the second motor. A stopping mechanism is configured to limit a maximum rotation angle of the steering wheel. 1. A steering apparatus for a steer by wire system , the steering apparatus comprising:a first motor and a second motor configured to provide a torque;a first planetary gear set configured to receive the torque from the first motor and reduce the torque and output the reduced torque to a steering wheel to generate a reaction torque for steering;a second planetary gear set configured to receive the torque from the steering wheel and the second motor, to reduce and output the torque, and to variably output a gear ratio for an input by the steering wheel depending on a rotation of the second motor; anda stopping mechanism configured to be locked to a second stopper portion on a rotation path of a first stopper portion rotated on the basis of the torque output from the second planetary gear set to serve to limit a maximum rotation angle of the steering wheel.2. The steering apparatus of claim 1 , wherein the first motor claim 1 , the first planetary gear set claim 1 , the second planetary gear set claim 1 , and the stopping mechanism are sequentially disposed in a steering shaft connected to the steering wheel.3. The steering apparatus of claim 1 , wherein the first planetary gear set is provided with at least three rotation elements claim 1 , a first of the at least three rotation elements configured to receive the torque from the first motor claim 1 , a second of the at least three rotation ...

Подробнее
02-06-2016 дата публикации

CONTROL METHOD FOR ELECTRO HYDRAULIC POWER STEERING SYSTEM

Номер: US20160152260A1
Автор: Bang Jin Seok
Принадлежит:

An electrohydraulic power steering system includes a sensor for detecting steering information, a motor pump unit generating a hydraulic pressure for assisting steering power depending on a driver's steering wheel operation, and a hydraulic cylinder driven with the hydraulic pressure supplied from the motor pump unit to assist the steering power. A control method of the electrohydraulic power steering system includes acquiring steering angle information depending on the driver's steering operation and information on a steering torque applied through a steering wheel at the time of operating the steering wheel; determining a target steering torque depending on the acquired steering angle; and variably controlling a motor rotational speed of the motor pump unit so that the steering torque acquired through the sensor satisfies the target steering torque. 1. A control method for an electrohydraulic power steering system including a sensor for detecting steering information , a motor pump unit generating a hydraulic pressure for assisting steering power depending on a driver's steering wheel operation , and a hydraulic cylinder driven with the hydraulic pressure supplied from the motor pump unit to assist the steering power , the method comprising:acquiring steering angle information from the driver's steering operation and acquiring information on a steering torque applied through a steering wheel at the time of operating the steering wheel;determining a target steering torque from the acquired steering angle; andvariably controlling a motor rotational speed of the motor pump unit such that the steering torque acquired through the sensor satisfies the target steering torque.2. The method of claim 1 , wherein an entire steering angle range of steering wheel operation is divided into a plurality of determined steering angle sections and the target steering torque is preset for each steering angle section claim 1 , andwhen determining the target steering torque, the target ...

Подробнее
02-06-2016 дата публикации

Hydraulic system with margin based flow supplementation

Номер: US20160152261A1
Принадлежит: Caterpillar Inc

A hydraulic system with margin based flow supplementation is provided. The hydraulic system includes a steering pump, an implement pump and a flow sharing device. The steering pump is associated with a steering circuit. The implement pump is associated with an implement circuit. The flow sharing device is disposed between the steering circuit and the implement circuit and is configured to operate in one of a first mode and a second mode. Further, the flow sharing device allows hydraulic fluid to flow from the implement circuit to the steering circuit in the first mode, when a margin pressure of the steering circuit is below a threshold value, and the flow sharing device stops the hydraulic fluid to flow from the implement circuit to the steering circuit in the second mode, when the margin pressure of the steering circuit is equal to or above the threshold value.

Подробнее
07-05-2020 дата публикации

PARKING ASSISTANCE APPARATUS

Номер: US20200140011A1
Принадлежит: AISIN SEIKI KABUSHIKI KAISHA

The parking assistance apparatus of an embodiment includes: a memory; and a hardware processor coupled to the memory and configured to acquire a movement route to a target position when a steering angle of a vehicle is a given steering angle. The memory stores, with respect to individual steering angles other than the given steering angle, information representing a route where the vehicle is movable to a position included in the movement route by performing steering angle control beginning at the corresponding steering angle. The hardware processor acquires a steering angle of the vehicle, and calculates, based on the acquired steering angle, a corrected movement route to the target position by correcting the movement route with a route where the vehicle is movable to a position included in the movement route at the acquired steering angle in accordance with information representing the route stored in the memory. 1. A parking assistance apparatus comprising:a memory; and the memory is configured to store, with respect to individual steering angles other than the given steering angle, information representing a route where the vehicle is movable from the initial position of the vehicle to a position included in the movement route by performing steering angle control beginning at the corresponding steering angle,', 'the hardware processor is configured to acquire a steering angle of the vehicle, and', 'calculate, based on the acquired steering angle, a corrected movement, 'a hardware processor coupled to the memory and configured to acquire a movement route from an initial position of a vehicle to a target position when a steering angle of the vehicle is a given steering angle, wherein'}route from the initial position to the target position of the vehicle by correcting the movement route with a route where the vehicle is movable to a position included in the movement route at the acquired steering angle in accordance with information representing the route stored in ...

Подробнее
11-06-2015 дата публикации

STEERED WHEEL VISUAL FEEDBACK SYSTEM FOR VARIABLE RATE STEERING SYSTEMS

Номер: US20150158522A1
Автор: Thayer Kevin P.
Принадлежит: EATON CORPORATION

A steering control system is for use on a vehicle having an operator station including a steering wheel that is turned by an operator of the vehicle to cause a steered wheel of the vehicle to pivot relative to a main body. The steering control system includes a hydraulic cylinder for changing a steered position of the steered wheel in response to movement of the steering wheel. The steering control system also includes a hydraulic circuit arrangement that varies a volume of hydraulic fluid flow provided to the hydraulic cylinder per degree of rotation of the steering wheel based on a rotational speed of the steering wheel. The hydraulic circuit arrangement directs a first volume of hydraulic fluid to the hydraulic cylinder per degree of rotational movement of the steering wheel when the steering wheel is rotated at a first rotational speed, and directs a second volume of hydraulic fluid to the hydraulic cylinder per degree of rotational movement of the steering wheel when the steering wheel is rotated at a second rotational speed. The second rotational speed is larger than the first rotational speed and the second volume of hydraulic fluid being larger than the first volume of hydraulic fluid, wherein the steering control system is more sensitive when the steering wheel is rotated at the second rotational speed than the first rotational speed. The system also includes a sensor for sensing the steered position of the steered wheel, a display positioned at the operator station, the display providing an indication of the steered position of the steered wheel, and a controller that interfaces with the hydraulic circuit arrangement, the sensor and the display. 1. A steering control system for use on a vehicle having an operator station including a steering wheel that is turned by an operator of the vehicle to cause a steered wheel of the vehicle to pivot relative to a main body , the steering control system including a hydraulic cylinder for changing a steered position ...

Подробнее
11-06-2015 дата публикации

HYDRAULIC STEERING DEVICE

Номер: US20150158523A1
Принадлежит:

A hydraulic steering device () is described comprising a supply port arrangement having a supply port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path () between the supply port (P) and the working port arrangement, a return flow path () between the working port arrangement and the tank port (T), flow meter means () being arranged in said main flow path (), said flow meter means () comprising at least two flow meters () and a flow meter valve means (), said flow meter valve means () in a first operation mode connecting at least two flow meters () in parallel and in a second operation mode making inactive at least one flow meter (). Such a steering device should be operated comfortable for a driver. To this end an amplification flow path () is arranged in parallel to said main flow path (), said amplification flow path () being connected to said main flow path () downstream said flow meter means () in a direction from said supply port (P) to said working port arrangement. 1. A hydraulic steering device comprising a supply port arrangement having a supply port (P) and a tank port (T) , a working port arrangement having two working ports (L , R) , a main flow path between the supply port (P) and the working port arrangement , a return flow path between the working port arrangement and the tank port (T) ,flow meter means being arranged in said main flow path, said flow meter means comprising at least two flow meters and flow meter valve means, said flow meter valve means in a first operation mode connecting at least two flow meters in parallel and in a second operation mode making inactive at least one flow meter, wherein an amplification flow path is arranged in parallel to said main flow path, said amplification flow path being connected to said main flow path downstream said flow meter means in a direction from said supply port (P) to said working port arrangement.2. The hydraulic steering device according to claim ...

Подробнее
09-06-2016 дата публикации

STEERING SYSTEM FOR AN AGRICULTURAL VEHICLE

Номер: US20160159391A1
Принадлежит:

A steering system for an agricultural vehicle has at least one steering cylinder for changing a steering angle of the agricultural vehicle, a hydraulic main steering valve for pressurizing the at least one steering cylinder, a steering transducer for actuating the main steering valve, a steering boost for controlling an adjustment characteristic between the steering transducer and the at least one steering cylinder and a sensor system for detecting an external signal of the agricultural vehicle. The steering boost controls the adjustment characteristic on the basis of the detected external signal. 1. A steering system for an agricultural vehicle , comprising:at least one steering cylinder for changing a steering angle of the agricultural vehicle;a hydraulic main steering valve for pressurizing the at least one steering cylinder;a steering transducer for actuating the main steering valve;a steering boost for adjusting or controlling an adjustment characteristic between the steering transducer and the at least one steering cylinder; anda sensor system for detecting an external signal of the agricultural vehicle;wherein the steering boost controls the adjustment characteristic on the basis of the detected external signal in such a way that a steering ratio between the steering transducer and the at least one steering cylinder is controlled on the basis of the detected external signal.2. The steering system according to claim 1 , wherein the steering boost adjusts a turning circle diameter of the agricultural vehicle on the basis of the detected external signal.3. The steering system according to claim 1 , wherein the steering boost selects a default setting claim 1 , on the basis of the detected external signal claim 1 , from a large number of stored default settings claim 1 , and wherein the stored default settings are each preferably assigned to an environmental state claim 1 , and to adjust or control the adjustment characteristic according to the selected default ...

Подробнее
22-09-2022 дата публикации

HYDRAULIC SYSTEM FOR WORK MACHINE WITH STEERABLE REAR WHEELS

Номер: US20220297749A1
Автор: KARST AUSTIN J.
Принадлежит:

A hydraulic system for controlling a pair of steerable caster wheels includes a left side actuator and a right side actuator. A rear steering control valve is moveable between a first state for disabling direct control of the left and side actuators and a second state for enabling direct control the left and right side actuators to provide a steer response. A fluid connection continuously connects the pressure source and the fluidic tie rod fluid circuit in fluid communication when the rear steering control valve is disposed in one of the first state and the second state to continuously supply the pressurized fluid to the fluidic tie rod fluid circuit. 1. A hydraulic system for controlling a pair of steerable caster wheels of an agricultural machine , the hydraulic system comprising:a pressure source operable to circulate a pressurized fluid;a left side actuator configured to control a left caster wheel;a right side actuator configured to control a right caster wheel;a rear steering control valve moveable between a first state disabling direct control of the left side actuator and the right side actuator, and a second state enabling direct control the left side actuator and the right side actuator to provide a steer response;a left side steering fluid circuit in fluid communication with the left side actuator;a right side steering fluid circuit in fluid communication with the right side actuator;a fluidic tie rod fluid circuit interconnecting both the left side actuator and the right side actuator with the rear steering control valve in fluid communication; anda fluid connection continuously connecting the pressure source and the fluidic tie rod fluid circuit in fluid communication when the rear steering control valve is disposed in one of the first state and the second state to continuously supply the pressurized fluid to the fluidic tie rod fluid circuit.2. The hydraulic system set forth in claim 1 , wherein the fluid connection continuously connects the pressure ...

Подробнее
22-09-2022 дата публикации

Control system, method of controlling work vehicle, and work vehicle

Номер: US20220298749A1
Принадлежит: KOMATSU LTD

A motor grader representing a work vehicle includes a steering mechanism and a control unit. The control unit controls the steering mechanism to maintain constant, a rate of change in a direction of travel per unit travel distance of the motor grader.

Подробнее
18-06-2015 дата публикации

VEHICLE CONTROL APPARATUS AND VEHICLE CONTROL METHOD

Номер: US20150166063A1
Автор: ISHIHARA Atsushi
Принадлежит:

A vehicle control apparatus executes automated cruise control under which a steering apparatus is controlled to make a vehicle perform automated cruise. The vehicle control apparatus sets a curvature radius difference threshold used in a process for determining whether to start automated cruise control, based on a transverse deviation of the vehicle. The vehicle control apparatus does not start the automated cruise control when the absolute value of a curvature radius difference is larger than the curvature radius difference threshold. The curvature radius difference is a difference between a travelling path curvature radius and a lane curvature radius, the travelling path curvature radius being a curvature radius of a travelling path of the vehicle and the lane curvature radius being a curvature radius of a lane in which the vehicle is travelling. 1. A vehicle control method for executing automated cruise control under which a steering apparatus of a vehicle is controlled to make the vehicle perform automated cruise , the method comprising:setting a curvature radius difference threshold based on vehicle information that is information regarding travelling of the vehicle, the curvature radius difference threshold being used in a process for determining whether the automated cruise control is to be started; anddetermining whether an absolute value of a curvature radius difference that is a difference between a travelling path curvature radius and a lane curvature radius is larger than the curvature radius difference threshold, the travelling path curvature radius being a curvature radius of a travelling path of the vehicle and the lane curvature radius being a curvature radius of a lane in which the vehicle is travelling, whereinthe automated cruise control is not started when the absolute value is larger than the curvature radius difference threshold.2. The vehicle control method according to claim 1 , wherein the vehicle information includes at least one of a ...

Подробнее
24-06-2021 дата публикации

Steering System for an Automated Vehicle

Номер: US20210188345A1
Принадлежит: BOMBARDIER TRANSPORTATION GMBH

An autonomous vehicle for passengers includes four steerable wheels where each steerable wheel is steered by a steering system having a set of two actuators. One actuator of each set of actuators is powered by a first power source while the other actuator of the set of powered by a second power source. Four controllers each control one actuator of each set of actuators and one actuator from another set of actuators.

Подробнее
04-09-2014 дата публикации

MOUNTING ARRANGEMENT FOR STEERING PUMP

Номер: US20140246557A1
Автор: Roach Keegan W.
Принадлежит: CATERPILLAR INC.

A mounting arrangement for a steering pump assembly of a vehicle is disclosed. The mounting arrangement includes a mounting plate coupled to a floorboard of the vehicle. A top plate is disposed above the mounting plate and a bottom plate is disposed below the mounting plate. The mounting plate, top plate and bottom plate include a first, second, and third apertures, respectively, which are in alignment with one another along a pump axis. A first, second, and third openings of the mounting plate, top plate and bottom plate, respectively, are in alignment with one another. A tubal isolation mount is located within first opening of the mounting plate. A fastener extends through each isolation mount, each second and third opening and a body of the steering pump assembly. A sealing member is provided between the top plate and the mounting plate. 1. A mounting arrangement for a steering pump assembly of a vehicle , the mounting arrangement comprising:a mounting plate configured to be releasably coupled to a floorboard of the vehicle, the mounting plate having a first aperture and a plurality of first openings formed therein;a top plate spaced apart and disposed above the mounting plate, the top plate having a second aperture and a plurality of second openings formed therein;a bottom plate spaced apart and disposed below the mounting plate, the bottom plate having a third aperture and a plurality of third openings formed therein, wherein the first, second, and third apertures are in alignment with one another along a pump axis and configured to receive a pump adapter of a steering pump, wherein the first, second, and third openings are in alignment with one another and spaced from the pump axis;a tubal isolation mount located within each first opening of the mounting plate;a fastener extending through each isolation mount and each second and third opening of the corresponding plates to secure the top plate, the bottom plate, and a body of the steering pump to be downwardly ...

Подробнее
14-06-2018 дата публикации

EMERGENCY STEERING PUMP SYSTEM FOR A MACHINE

Номер: US20180162441A1
Принадлежит: CATERPILLAR INC.

An emergency steering pump system for a primary pump providing a standby pressure via a primary output line includes a load sense line that is configured to branch-off from the primary output line. The load sense line has a first orifice disposed therein. A secondary pump is included for providing a margin pressure via a secondary output line that is coupled to the primary output line at a point downstream of the load sense line. A communication line is coupled to the primary output line at a point upstream of the load sense line. The communication line has a pressure control mechanism disposed therein. An output of the pressure control mechanism is coupled with an unloader valve of the secondary pump such that the pressure control mechanism is configured to bring about the margin pressure from the secondary pump. 1. An emergency steering pump system for a primary pump providing a standby pressure via a primary output line , the emergency steering pump system comprising:a load sense line configured to branch-off from a point located partway along a length of the primary output line, the load sense line having a first orifice disposed therein;a secondary pump for providing a margin pressure, the secondary pump having a secondary output line coupled to the primary output line at a point downstream of the load sense line; anda communication line coupled to the primary output line at a point upstream of the load sense line, the communication line having a pressure control mechanism disposed therein, wherein an output of the pressure control mechanism is coupled with an unloader valve of the secondary pump such that the pressure control mechanism is configured to bring about the margin pressure from the secondary pump.2. The emergency steering pump system of claim 1 , wherein the pressure control mechanism includes a resolver.3. The emergency steering pump system of further comprising a variable spring-loaded relief valve disposed between a point upstream of the primary ...

Подробнее
15-06-2017 дата публикации

Steering system with magnetic torque overlay lash compensation

Номер: US20170166249A1
Автор: Joel E. Birsching
Принадлежит: Steering Solutions IP Holding Corp

Technical solutions for compensating for lash in a steering system are described. An example method includes determining a rack pressure value based on a driver torque value and a differential pressure across a rack of the steering system. The method also includes determining a compensation friction value based on a position of a handwheel of the steering system and a speed of a vehicle equipped with the steering system. The method also includes computing a pressure value based on the rack pressure value and the compensation friction value. The method also includes generating a torque command using the pressure value, the torque command being added to the driver assist torque for the steering system.

Подробнее
29-09-2022 дата публикации

Vehicle drive transmission and electrically assisted steering system

Номер: US20220306195A1
Принадлежит: Ontario Drive and Gear Ltd

A transmission for a vehicle, particularly a skid-steered vehicle, that employs motive power from a prime mover delivered through an input shaft to drive left and right drive shafts at a nominal speed and input power from an electric motor to vary the speed of the left and right drive shafts according to steering commands from a steering control structure. The speed of the left and right drive shafts is directly related to a speed of the input shaft and the nominal speed of the left or right drive shaft is varied upwardly or downwardly by a ratio of the speed of the steering shaft via a speed varying structure. The speed of the left and right drive shafts is simultaneously varied in opposite directions (i.e. upwardly and downwardly) relative to the nominal speed by an equal number of rotations.

Подробнее