СПОСОБ И УСТРОЙСТВО ДЛЯ ВОССТАНОВЛЕНИЯ ФИЛЬТРА ТВЕРДЫХ ЧАСТИЦ, РАСПОЛОЖЕННОГО В ВЫХЛОПНОМ КАНАЛЕ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение касается способа и устройства для восстановления фильтра твердых частиц, расположенного в выхлопном канале двигателя внутреннего сгорания, в частности фильтра твердых частиц дизельного выхлопа. Сущность изобретения: способ восстановления фильтра твердых частиц, расположенного в выхлопном канале двигателя внутреннего сгорания, причем к фильтру твердых частиц подводят подлежащий очищению поток выхлопных газов, при этом в режиме восстановления от потока выхлопных газов выше по потоку работающей на выхлопных газах турбины (19) работающего на выхлопных газах турбонагнетателя (20) ответвляют заданное количество подлежащего нагреву потока (16) выхлопных газов, которое после нагрева с помощью нагревательного устройства (8) в виде горячего потока (16′) выхлопных газов смешивают с выходящим из турбины (19) и имеющим более низкую по сравнению с ним температуру остаточным потоком (15′) выхлопных газов выше по потоку, по меньшей мере, одного фильтра (3) твердых частиц. Также предложено устройство ...

УСТРОЙСТВО ОЧИСТКИ ОТРАБОТАННЫХ ГАЗОВ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ (ВАРИАНТЫ)

Устройство очистки отработанных газов двигателя внутреннего сгорания содержит выпускной канал (15) для выведения отработанных газов, выпускаемых из двигателя, наружу, катализатор (5), расположенный в выпускном канале (15), канал (24а) впрыска, соединенный со стороной впуска катализатора (5) в выпускном канале (15), клапан (23) впрыска добавки, установленный в канале (24а) впрыска для подачи добавки в катализатор (5) по каналу (24а) впрыска, и приточную часть (30), которая обеспечивает подачу части отработанных газов, проходящих в выпускном канале в канал впрыска, и средство формирования продувочного потока. Выпускной канал имеет изогнутую часть (15а). Канал впрыска (24а) ответвляется наружу от середины изогнутой части выпускного канала. Приточная часть может представлять трубчатый элемент. Средство формирования продувочного потока имеет часть для столкновения, с которой сталкиваются отработанные газы, вводимые из приточной части. Такое выполнение уменьшает образование отложений в канале ...

СИСТЕМА ПОСЛЕДУЮЩЕЙ ОБРАБОТКИ ОТРАБОТАВШИХ ГАЗОВ С ДОБАВЛЕНИЕМ АКТИВИРУЮЩЕГО МАТЕРИАЛА В ВОССТАНОВИТЕЛЬ, ВВОДИМЫЙ В КАТАЛИТИЧЕСКИЙ НЕЙТРАЛИЗАТОР

Изобретение относится к системе последующей обработки отработавших газов. Система (10) последующей обработки отработавших газов содержит: блок (12) каталитического нейтрализатора с по меньшей мере одним каталитическим материалом (14), установленный в трубопроводе (16) выпуска отработавших газов по потоку ниже двигателя (18) внутреннего сгорания, первый бак (44а) для содержания по меньшей мере одного реагента-восстановителя (22), второй бак (44) для содержания активирующего материала и одно или несколько дозирующих устройств (20, 20a, 20b) для подачи по меньшей мере одного реагента-восстановителя (22) для снижения содержания оксидов NOв отработавших газах (24), содержащего по меньшей мере один углеводород, выполненных с возможностью подачи в отработавшие газы (24) по меньшей мере одного активирующего материала (26), который включает по меньшей мере один кислородсодержащий углеводород эфирного типа, содержащий эфир, выбранный из группы, состоящей из триглима, диглима, моноглима, диэтилового ...

ВЫХЛОПНАЯ СИСТЕМА С КАТАЛИЗАТОРОМ РЕФОРМИНГА

Изобретение относится к выхлопной системе, предназначенной для обработки выхлопного газа двигателя внутреннего сгорания. Выхлопная система включает тройной катализатор (TWC – three-way catalyst), катализатор реформинга топлива, расположенный по потоку после TWC, и устройство подачи топлива, расположенное по потоку до катализатора реформинга топлива, при этом первую часть выхлопного газа направляют в обход TWC и приводят в контакт с катализатором реформинга топлива в присутствии топлива, добавляемого из устройства подачи топлива, с образованием потока газообразных продуктов реформинга, а вторую часть выхлопного газа приводят в контакт с TWC и используют для нагревания катализатора реформинга топлива, после чего сбрасывают в атмосферу, и при этом поток газообразных продуктов реформинга рециркулируют в систему впуска двигателя. Изобретение обеспечивает улучшение теплообмена и максимальное снятие тепла выхлопного газа с целью улучшения каталитического реформинга. 7 з.п. ф-лы, 2 ил., 4 табл.

СПОСОБ УДАЛЕНИЯ ЗАГРЯЗНЯЮЩИХ ПРИМЕСЕЙ ИЗ ОТРАБОТАВШЕГО ГАЗА ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

Изобретение может быть использовано в химической промышленности. Способ удаления загрязняющих примесей из отработавшего газа дизельного двигателя включает стадии впрыскивания в отработавший газ двигателя восстановителя, содержащего мочевину или аммиак, селективное каталитическое восстановление восстановителем оксидов азота, содержащихся в отработавшем газе, и периодическое впрыскивание углеводорода в полученный выходящий поток. Способ также включает следующие стадии: окисление монооксида углерода, твердых частиц, не полностью сгоревших углеводородов и добавленного углеводорода до диоксида углерода и воды; селективное окисление возможного избытка восстановителя до свободного азота; фильтрацию выходящего потока пропусканием газа через каталитический фильтр, где оставшиеся твердые частицы задерживаются в фильтре и где монооксид углерода, твердые частицы и углеводороды окисляются до диоксида углерода и воды, и восстановитель селективно окисляется до азота. Предложенное изобретение позволяет ...

КАТАЛИЗАТОРНАЯ СИСТЕМА И ЕЕ ПРИМЕНЕНИЕ

Изобретение относится к катализаторной системе и ее применению для нейтрализации или снижения токсичности отработавших газов (ОГ). Сущность изобретения: катализаторная система для нейтрализации или снижения токсичности отработавших газов (ОГ) двигателя внутреннего сгорания, имеющая по меньшей мере два размещенных в общем корпусе (2) катализатора (3, 4), которые в направлении потока ОГ расположены последовательно и с интервалом (d) друг от друга и которые способны обеспечивать каталитическое сгорание содержащихся в обедненных ОГ углеводородов и моноксида углерода, и расположенная перед вторым корпусом (5) с размещенным в нем сажевым фильтром (6), причем интервал (d) между двумя соседними катализаторами составляет от 2 до 30 мм, а катализаторы (3, 4) представляют собой катализаторы окисления или комбинацию из катализаторов окисления и трехкомпонентных каталитических нейтрализаторов. Техническим результатом изобретения является обеспечение снижения скорости старения при каталитическом сгорании ...

УСТРОЙСТВО И СПОСОБ РЕГЕНЕРАЦИИ ФИЛЬТРА ТВЕРДЫХ ЧАСТИЦ, РАСПОЛОЖЕННОГО В ЛИНИИ ОТРАБОТАННОГО ГАЗА ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к устройству и способу для регенерации фильтра твердых частиц, расположенного в линии отработанного газа двигателя внутреннего сгорания, с по меньшей мере одним расположенным выше по потоку, чем фильтр твердых частиц, катализатором окисления NO для окисления NO, в частности до NO. Согласно способу по изобретению выше по потоку, чем фильтр (6) твердых частиц, предусмотрено, кроме того, по меньшей мере одно нагревательное устройство (8; 19), с помощью которого подходящий к фильтру (6) твердых частиц поток отработанного газа (2'") нагревается до определенной температуры в зависимости от определенных параметров регенерации, в частности в зависимости от степени заполнения фильтра (6) твердых частиц и/или от степени эффективности, основанной на NOрегенерации фильтра (6) твердых частиц, с помощью по меньшей мере одного катализатора (4) окисления NO, образующего NO. Техническим результатом изобретения является обеспечение конструктивно простой и компактной, безопасной в функционировании ...

СИСТЕМА ОЧИСТКИ ВЫХЛОПНЫХ ГАЗОВ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к очистке отработавших газов двигателя внутреннего сгорания. В двигателе внутреннего сгорания в выхлопном канале двигателя размещены клапан (15) подачи углеводородов и каталитический нейтрализатор (13) для очистки выхлопных газов. Используются первый способ удаления NO, который восстанавливает содержащийся в выхлопном газе NOвосстанавливающим промежуточным соединением, которое образуется при впрыске углеводородов из клапана (15) подачи углеводородов в заданном диапазоне периода, и второй способ удаления NO, в котором соотношение воздух-топливо выхлопного газа, втекающего в каталитический нейтрализатор (13) для очистки выхлопных газов, делается богатым в течение периода, который продолжительнее этого заданного диапазона. Температуры ST и STпереключения каталитического нейтрализатора (13) для очистки выхлопных газов, при которых способ удаления NOпереключается со второго способа удаления NOна первый способ удаления NO, задаются более низкими, если количество NOв выхлопном ...

СПОСОБ РЕГЕНЕРАЦИИ АДСОРБЕНТА КАТАЛИЗАТОРА NSR ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ, СИСТЕМА ВОССТАНОВЛЕНИЯ NOX В ВЫХЛОПНЫХ ГАЗАХ ДВИГАТЕЛЯ ВНУТРЕННЕГОСГОРАНИЯ И МОДУЛЬ ОБРАБОТКИ ТОПЛИВА

... 1. Способ регенерации адсорбента катализатора NSR для двигателя внутреннего сгорания, характеризующийся тем, что включает стадии получения потока выхлопных газов двигателя, содержащего кислород, осуществления импульсного впрыскивания углеводородного топлива на технологической схеме в позиции перед модулем обработки топлива, где модуль обработки топлива включает впускное отверстие, выпускное отверстие и, по меньшей мере, один катализатор, необязательного перемешивания потока выхлопных газов с топливом, проведения реакции для смеси топлива и потока выхлопных газов, по меньшей мере, на одном катализаторе модуля обработки топлива с образованием восстановительной газообразной смеси, содержащей СО и Н2, введения восстановительной газообразной смеси к катализатору NSR, включающему адсорбент, при этом в результате введения восстановительной газообразной смеси происходит регенерация адсорбента. 2. Способ по п.1, характеризующийся тем, что стадия осуществления импульсного впрыскивания углеводородного ...

УСТРОЙСТВО И СПОСОБ УПРАВЛЕНИЯ ФОРСУНКОЙ СИСТЕМЫ ПОСЛЕДУЮЩЕЙ ОБРАБОТКИ ОТРАБОТАВШИХ ГАЗОВ

... 1. Способ управления работой форсунки для системы последующей обработки отработавших газов (ПООГ) для предотвращения отложения нагара, причем сопло форсунки имеет каталитическое покрытие, и способ включает:выборочный впрыск углеводородной текучей среды в поток отработавших газов для повышения их температуры;подачу воздуха через сопло форсунки, если не осуществляется впрыск углеводорода, и температура отработавших газов ниже порогового уровня; ипо существу прекращение прохода потока воздуха через сопло форсунки, если не осуществляется впрыск углеводорода и температура отработавших газов выше порогового уровня.2. Способ по п. 1, дополнительно включающий:мониторинг состояния системы ПООГ;мониторинг температуры отработавших газов; ирегулирование впрыска углеводорода в поток отработавших газов в зависимости от состояния системы ПООГ и температуры отработавших газов.3. Способ по п. 1, включающий подачу потока воздуха через форсунку сразу же после впрыска углеводорода для продувки форсунки с целью ...

СИСТЕМА УПРАВЛЕНИЯ ВЫБРОСАМИ И СПОСОБ УПРАВЛЕНИЯ ВЫБРОСАМИ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Система управления выбросами, которая осуществляет управление регенерацией, при этом катализаторное устройство восстанавливается от загрязнения в первом режиме управления, в котором процесс повышения температуры и процесс освобождения поочередно повторяются, и во втором режиме управления, в котором процесс повышения температуры и процесс освобождения поочередно повторяются. В первом режиме управления процесс повышения температуры выполняется путем дожигающего впрыска из инжектора. Во втором режиме управления процесс повышения температуры выполняется путем добавления топлива в выхлопные газы из клапана добавления топлива, при этом концентрация НС в выхлопных газах колеблется с амплитудой и периодом в первом заданном диапазоне и периодом во втором заданном диапазоне. Режим управления переключается из первого режима управления во второй режим управления при управлении регенерацией. 2 н. и 1 з.п. ф-лы, 27 ил.

УСТРОЙСТВО УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ, ПОДАВЛЯЮЩЕЕ ВЫБРОСЫ БЕЛОГО ДЫМА

Изобретение может быть использовано в устройствах управления двигателей внутреннего сгорания. Устройство управления для двигателя внутреннего сгорания включает в себя устройство управления выхлопными газами в выпускной системе двигателя внутреннего сгорания. Устройство управления выхлопными газами содержит регулятор объема всасываемого воздуха, температурный датчик и электронный блок управления. Температурный датчик имеет возможность измерять температуру устройства управления выхлопными газами. Электронный блок управления имеет возможность оценивать величину накопления серного соединения. Величина накопления серного соединения является количеством серного соединения, накопленного на устройстве управления выхлопными газами. Когда конкретное условие, при котором величина накопления серного соединения равна или больше предварительно определенной величины накопления (S1) и температура устройства управления выхлопными газами равна или больше предварительно определенной температуры (S2), удовлетворяется ...

УСТРОЙСТВО ДЛЯ ОЧИСТКИ ОТРАБОТАВШИХ ГАЗОВ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

... 1. Устройство для очистки отработавших газов двигателя внутреннего сгорания, в выхлопном канале которого расположены передний и задний каталитические нейтрализаторы по направлению потока отработавших газов; передний и задний нейтрализаторы содержат катализатор, аккумулирующий NOx, содержащийся в отработавшем газе, при обедненном составе рабочей смеси поступающего выхлопного газа и высвобождающий аккумулированный NOx при обогащенном или стехиометрическом составе рабочей смеси поступающего выхлопного газа; для очистки переднего нейтрализатора от SOx повышают температуру переднего нейтрализатора до температуры высвобождения SOx и обогащают состав рабочей смеси выхлопного газа, поступающего в передний нейтрализатор, а для очистки заднего нейтрализатора от SOx повышают температуру заднего нейтрализатора до температуры высвобождения SOx и обедняют состав рабочей смеси выхлопного газа, поступающего в задний нейтрализатор; при этом частота очистки от SOx заднего нейтрализатора превышает частоту ...

СПОСОБ УМЕНЬШЕНИЯ ВЫБРОСОВ NOxСКВ И УСТРОЙСТВО ДЛЯ ЭТОГО

... 1. Способ уменьшения содержания окислов азота (NOx) в выхлопных газах дизельных двигателей или турбин для стационарных или передвижных применений/транспортных средств в системе СКВ обеспечением источника для хранения жидкого восстанавливающего агента и подачей этого восстанавливающего агента к выхлопным газам, причем указанный способ включает перенос жидкого восстанавливающего агента из внешнего резервуара для хранения в один или более мембранных резервуаров для хранения, каждый из которых снабжен внутренним сильфоном, состоящим из непроницаемой гибкой мембраны, и гидравлической или пневматической вытесняющей текучей средой, расположенной вне внутреннего сильфона, заполнение гибкого внутреннего сильфона жидким восстанавливающим агентом и одновременно приложение давления к вытесняющей текучей среде в мембранном резервуаре для хранения до тех пор, пока не достигнуто давление подачи, повышение давления вытесняющей текучей среды в мембранном резервуаре для хранения переносом дополнительного ...

СПОСОБ И СИСТЕМА ДЛЯ КАТАЛИТИЧЕСКОЙ КОНВЕРСИИ

СПОСОБ УПРАВЛЕНИЯ РАБОТОЙ УСТРОЙСТВА ДЛЯ СНИЖЕНИЯ ТОКСИЧНОСТИ ОТРАБОТАВШИХ ГАЗОВ, ОСНАЩЕННОГО НАГРЕВАТЕЛЕМ

... 1. Способ управления работой устройства (1) для снижения токсичности отработавших газов (ОГ) двигателя (2) внутреннего сгорания (ДВС), работающего на горючих смесях с избытком воздуха, каковое устройство (1) имеет по меньшей мере один по меньшей мере частично контактирующий с ОГ нагреватель (3), активизируемый электрической энергией и по меньшей мере частично снабженный окислительным покрытием (4), заключающийся в том, чтоа) по меньшей мере один нагреватель (3) нагревают до температуры выше первой заданной температуры (19),б) после этого контролируют по меньшей мере температуру по меньшей мере одного нагревателя (3) или ОГ ив) инициируют повышение относительного содержания углеводородов в ОГ в том случае, когда по меньшей меретемпература нагревателя (3) или ОГ достигла граничной температуры (21) илиДВС (2) работает в режиме (24) с низкой нагрузкой.2. Способ по п.1, при осуществлении которого относительное содержание углеводородов в ОГ повышают таким образом, что превращение присутствующих ...

СМЕШИВАЮЩЕЕ УСТРОЙСТВО ДЛЯ ПОСЛЕДУЮЩЕЙ ОБРАБОТКИ ОТРАБОТАННОГО ГАЗА

... 1. Смешивающее устройство (2) для последующей обработки отработанного газа в выхлопной системе двигателя внутреннего сгорания, которое включает в себя корпус (4) с имеющим входное поперечное сечение входным отверстием (24) и расположенную внутри корпуса (4) внутреннюю трубку (6) с образованной внутри внутренней трубки (6) областью (8) смешения, причем на торце корпуса (4) расположено дозирующее устройство (10) для подачи жидкости и/или смеси (14) жидкость-газ, и причем внутренняя трубка (6) на боковой поверхности (16) имеет проходные отверстия (18), через которые отработанный газ может поступать в область (8) смешения, отличающееся тем, что корпус (4) имеет спиральный участок (22) корпуса, причем данный спиральный участок (22) корпуса проходит по меньшей мере вдоль всех проходных отверстий (18) внутренней трубки (6).2. Смешивающее устройство (2) по п.1, отличающееся тем, что образованное проходными отверстиями (18) проходное поперечное сечение уменьшается по направлению к обращенному от ...

СПОСОБ И УСТРОЙСТВО ДЛЯ РЕГЕНЕРАЦИИ РАСПОЛОЖЕННОГО В ВЫПУСКНОМ ТРАКТЕ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ ФИЛЬТРА ТВЕРДЫХ ЧАСТИЦ

... 1. Способ регенерации расположенного в выпускном тракте двигателя внутреннего сгорания фильтра твердых частиц по меньшей мере с одним расположенным по потоку перед фильтром (3) твердых частиц катализатором (6) окисления NO, в частности, в NO2, через который проходит поток (15) отработавших газов, отличающийся тем, что предусматривают по меньшей мере одно расположенное по потоку перед фильтром (3) твердых частиц нагревательное устройство (8), в частности нагревательный катализатор, через которое пропускают дополнительный поток (14) газа и с помощью которого дополнительный поток (14) газа нагревают, при этом нагретый дополнительный поток (14) газа смешивают по потоку перед фильтром (3) твердых частиц с приходящим из катализатора (6) окисления NO, в частности насыщенным NO2 потоком (15) отработавших газов. ! 2. Способ по п.1, отличающийся тем, что дополнительный поток (14) газа ответвляют от потока свежего воздуха на стороне наддува воздуха или от имеющегося по потоку ниже вхождения трубопровода ...

Vorrichtung und Verfahren zur NOx- und/oder SOx-Regeneration eines NOx-Speicherkatalysators

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur NO¶x¶- und/oder SO¶x¶-Regeneration eines NO¶x¶-Speicherkatalysators, der in einer Abgasanlage eines Dieselmotors angeordnet ist und der zur Regeneration mit einem erhöhten Reduktionsmittel-Massenstrom am Abgas beaufschlagt wird. DOLLAR A Es ist vorgesehen, daß Mittel vorgesehen sind, mit denen die Erhöhung des Reduktionsmittel-Massenstromes ganz oder in Teilen durch eine Nacheinspritzung von Kraftstoff in den Dieselmotor (10) und/oder in die Abgasanlage (12) erreicht wird.

Fluideinspritzvorrichtung und Fluideinspritzsystem

Eine Fluideinspritzvorrichtung (10) beinhaltet einen Ventilkörper (20) mit einer zylindrischen Form und ein Ventilelement (30), welches beweglich in dem Ventilkörper (20) untergebracht ist und welches einen Ventiloberflächenabschnitt (35a) aufweist, der an dem Ventilsitzabschnitt (23a), der in einem Inneren des Ventilkörpers ausgebildet ist, anliegen oder von diesem getrennt sein kann. Das Ventilelement (30) weist einen innenseitigen Durchlass (31), durch welchen eine wässrige Harnstofflösung strömt, und einen Kommunikationsanschluss (33), welcher an einer äußeren peripheren Oberfläche des Ventilelements und an einer Position einer stromaufwärtigen Seite des Ventiloberflächenabschnitts (35a) in einer Strömungsrichtung von Luft geöffnet ist, auf. Ein ringförmiger Fluiddurchlass (W11), durch welchen die Luft strömt, ist zwischen einer inneren peripheren Oberfläche des Ventilkörpers und der äußeren peripheren Oberfläche des Ventilelements ausgebildet. Der Kommunikationsanschluss ist an dem ...

Verfahren zum Betrieb eines mehrzylindrigen Verbrennungsmotors

Verfahren zum Reinigen von in Abgas enthaltenem Stickoxid und ein das Verfahren ausführendes Abgassystem

Ein Abgassystem kann einen Injektor, welcher an einer Abgasleitung oder einem Motor montiert ist und zusätzlich Kraftstoff einspritzt, einen Dieselkraftstoff-Crackkatalysator, welcher an der Abgasleitung stromabwärts des Injektors montiert ist und den zusätzlich eingespritzten Kraftstoff durch thermisches Cracken in ein hochreaktives Reduktionsmittel umwandelt, einen DE-NOx-Katalysator, welcher an der Abgasleitung stromabwärts des Dieselkraftstoff-Crackkatalysators montiert ist, das in dem Abgas enthaltene Stickoxid speichert und das gespeicherte Stickoxid freigibt durch das zusätzliche Einspritzen des Kraftstoffes, um das Stickoxid durch eine Oxidations-Reduktions-Reaktion mit dem hochreaktiven Reduktionsmittel zu reduzieren, und einen Steuerabschnitt umfassen, welcher die zusätzliche Kraftstoffeinspritzung gemäß dem Fahrzustand des Motors steuert, wobei der Steuerabschnitt den Injektor derart steuern kann, dass dieser gemäß einem vorbestimmten Einspritzmuster zusätzlich Kraftstoff einspritzt ...

VERFAHREN UND VORRICHTUNG ZUR STEUERUNG EINES ABGASNACHBEHANDLUNGSSYSTEMS

Abgassteuersystem für Verbrennungsmotor

Abgassteuersystem für einen Verbrennungsmotor, umfassend:eine Abgassteuervorrichtung (60, 70), die in einer Abgasleitung (5) des Verbrennungsmotors (1) vorgesehen ist, wobei die Abgassteuervorrichtung (60, 70) einen Katalysator zur selektiven NOx-Reduktion (52) mit einer Funktion zum selektiven Reduzieren von NOx im Abgas mit Ammoniak als einem Reduktionsmittel und ein Abgassteuerelement (51) mit einer von dem Katalysator zur selektiven NOx-Reduktion (52) verschiedenen Abgassteuerfunktion einschließt;ein Zugabeventil (54), das in der Abgasleitung (5) vorgesehen ist und ein Additiv,das Ammoniak oder ein Vorläufer von Ammoniak ist, dem Katalysator zur selektiven NOx-Reduktion (52) zuführt; undeine Zugabesteuereinheit, die die Zugabe des Additivs durch das Zugabeventil (54) steuert; undeine Temperaturerhöhungsbehandlungseinheit, die, wenn eine festgelegte Bedingung für die Durchführung der Temperaturerhöhung erfüllt ist, eine Temperaturerhöhungsbehandlung durchführt, die die Temperatur des ...

Abgassteuersystem für Verbrennungsmotor

Es wird eine Abgassteuervorrichtung offenbart, die ein Abgassteuerelement aufweist, welches von einem SCR-Katalysator verschieden ist. Eine Temperaturerhöhungsbehandlungseinheit führt eine Temperaturerhöhungsbehandlung durch, bei der die Temperatur des in die Abgassteuervorrichtung strömenden Abgases so erhöht, dass die Temperatur des Abgassteuerelements auf eine festgelegte Zieltemperatur erhöht wird. In diesem Fall wird, wenn der Betrieb des Verbrennungsmotors gestoppt wird während die Temperaturerhöhungsbehandlungseinheit keine Temperaturerhöhungsbehandlung durchführt, nach dem Betriebsstop des Verbrennungsmotors eine Zugabe eines Additivs aus einem Zugabeventil zu dem SCR-Katalysator durchgeführt. Wenn der Betrieb des Verbrennungsmotors gestoppt wird während die Temperaturerhöhungsbehandlungseinheit die Temperaturerhöhungsbehandlung durchführt, wird nach dem Betriebsstop des Verbrennungsmotors keine Zugabe des Additivs aus einem Zugabeventil zu dem SCR-Katalysator durchgeführt.

Druckspeicher

Ein Druckspeicher (2a–2f), insbesondere für ein Abgasnachbehandlungssystem, umfasst: ein Gehäuse (4) mit einem darin ausgebildeten Hohlraum (20); einen Kolben (6), der beweglich so in dem Hohlraum (20) angeordnet ist, dass in dem Hohlraum (20) ein Druckspeichervolumen (21) ausgebildet ist, dessen Größe durch Bewegen des Kolbens (6) in einer Längsrichtung variierbar ist; ein Dichtungselement (12), das zwischen dem äußeren Umfang des Kolbens (6) und dem inneren Umfang des Hohlraums (20) derart angeordnet ist, dass der äußeren Umfang des Kolbens (6) von dem inneren Umfang des Hohlraums (20) beabstandet ist; sowie ein Führungselement (18), das sich in der Längsrichtung durch das Gehäuse (4), den Hohlraum (20) und den Kolben (6) erstreckt, und das ausgebildet ist, die Bewegung des Kolbens (6) in der Längsrichtung zu führen.

SYSTEM UND VERFAHREN ZUR VERBESSERTEN EMISSIONSKONTROLLE VON BRENNKRAFTMASCHINEN

Gerät, System und Verfahren für verbesserten Schutz von Russpartikelfiltern

Ein Gerät für verbesserten Schutz eines Rußpartikelfilters, das Folgendes umfasst: ein Betriebsdetektormodul, das so konfiguriert ist, dass eine Betriebsanzeige des Motors eingestellt wird, wenn beim Betrieb eines Verbrennungsmotors ein bestimmter Schwellenwert an Ruß erzeugt wird. ein Zeitsteuerungsmodul für den Start der Regeneration, das so konfiguriert ist, dass ein erster Zähler auf der Grundlage der Betriebsanzeige des Motors inkrementiert und die Anzeige für die Regenerationsanfrage eingestellt wird, wenn der erste Zähler einen ersten Schwellenwert erreicht; ein Zeitsteuerungsmodul für den Stopp der Regeneration, das so konfiguriert ist, dass ein zweiter Zähler auf der Grundlage der eingestellten Anzeige für die Regenerationsanfrage inkrementiert und die Anzeige für die Regenerationsanfrage zurückgesetzt wird, wenn der zweite Zähler einen zweiten Schwellenwert erreicht; ein Modul für Regenerationsanfragen, das so konfiguriert ist, dass auf der Grundlage der Anzeige für die Regenerationsanfrage ...

Verfahren zum Reduzieren von NOx in Dieselmotorenabgas

Verfahren zum Reduzieren von Stickstoffoxiden einschließlich NO in einem ebenfalls Sauerstoff, Kohlenmonoxid und Kohlenwasserstoffe enthaltenden Abgasstrom bei einer Temperatur oberhalb von 150°C, wobei das Verfahren umfasst: Durchströmen von Luft durch einen nicht thermischen Plasmareaktor, um ein Ozon enthaltendes Plasma zu erzeugen, sowie Zuführen des Plasmas zu dem Abgasstrom für die Oxidation von NO zu NO2, Zuführen von Ethanol zu dem Abgasstrom getrennt von der Zuführung des Plasmas für die Reduktion der Stickstoffoxide und daran anschließend Kontaktieren des Abgasstroms mit einem Zweibettreduktionskatalysator enthaltend in dem ersten Bett NaY Zeolith und/oder BaY Zeolith und in dem zweiten Bett CuY Zeolith, um die Stickstoffoxide zu N2 zu reduzieren.

Abgasnachbehandlungssystem

Die Erfindung betrifft ein Abgasnachbehandlungssystem für eine Brennkraftmaschine, beinhaltend eine Vorrichtung zur Einbringung von Kohlenwasserstoffen in ein das Prozessabgas der Brennkraftmaschine führendes Abgasrohr und eine stromabwärts des Einbringungsortes von Prozessgas durchströmte und durch Oxidation der eingebrachten Kohlenwasserstoffe die Prozessabgastemperatur erhöhenden Behandlungseinrichtung. Erfindungsgemäß wird ein Abgasnachbehandlungssystem und ein Verfahren zum Betreiben eines derartigen Abgasnachbehandlungssystems angegeben, das kostengünstig realisierbar ist. Dies wird dadurch erreicht, dass die Behandlungsvorrichtung katalytisch beschichtete Bauteile aufweist, dass die Kohlenwasserstoffe in der Vorrichtung zumindest teilweise verdampft sowie durch Crackreaktionen und/oder durch partielle Oxidation chemisch verändert werden und dass der Platinanteil zumindest in einem Teilbereich der katalytischen Beschichtung der Bauteile weniger als 20% der Gesamtmasse aller katalytisch ...

Device for dosing liquid for supporting exhaust gas treatment in exhaust line of internal combustion engine, has nozzle assembly for dosing liquid in exhaust line of internal combustion engine

The device has a nozzle assembly (30) for dosing the liquid (12) in an exhaust line (8) of an internal combustion engine (5). The nozzle assembly has a valve (31). A balance is controlled or regulated by a dosing pump (20) between the liquid and the nozzle assembly. The valve is periodically opened and closed by a control unit of the dosing pump in vibrating mode. An independent claim is also included for a method for dosing liquid for supporting the exhaust gas treatment in an exhaust line of an internal combustion engine.

Abgasreinigungsvorrichtung für einen Motor

Verfahren zur Verminderung der Stickoxide im Abgas von Verbrennungsmotoren

Method for controlling temperature in exhaust tract of internal-combustion engine, involves arranging diesel particle filter downstream to catalyst and arranging temperature sensor downstream to catalyst

The method involves arranging diesel particle filter downstream to a catalyst (11) and arranging a temperature sensor downstream to the catalyst. The regulating value is determined by a model. Independent claims are also included for the following: (1) a computer program; and (2) a computer program product with program code.

Abgasnachbehandlungssysteme

Abgasnachbehandlungssystem für den Auspuff eines Innenverbrennungsmotors (10) mit einem ersten Oxidationskatalysator (13), einem stromab von dem genannten ersten Oxidationskatalysator (13) angeschlossenen Katalysator für selektive katalytische Reduktion (SCR-Katalysator) (14), und einem stromab von dem genannten SCR-Katalysator (14) angeschlossenen Partikelfilter (15).

Verfahren zur Überprüfung des Wirkungsgrades eines NOx-Speicherkatalysators

In order to check the efficiency of an NOx accumulation catalyst (3) mounted in the exhaust system of an internal combustion engine (1) operated with a lean mixture, the actual accumulation capacity of the NOx accumulation catalyst (3) is determined and the NOx accumulation catalyst is diagnosed as defective when a predetermined minimum capacity is not reached.

Verfahren zum Betrieb einer Abgasnachbehandlungseinrichtung eines Kraftfahrzeugs

Verfahren zum Betrieb einer Abgasnachbehandlungseinrichtung (6) zum Reinigen eines Abgasstromes eines Kraftfahrzeugs (2) mit einer Brennkraftmaschine (4), wobei die Abgasreinigungseinrichtung (6) in Abgasströmungsrichtung hintereinander angeordnet einen ersten NOx-Speicherkatalysator (8a) und beabstandet vom ersten NOx-Speicherkatalysator (8a) einen zweiten NOx-Speicherkatalysator (8b) aufweist, mit den Schritten:Wechseln von einem Betrieb der Brennkraftmaschine (4) mit einem mageren Gemisch zu einem Betrieb mit einem fetten Gemisch,Erfassen eines Wertes repräsentativ für eine Menge an zugeführten Reduktionsmittel bis zu einem Durchbruch durch den ersten NOx-Speicherkatalysator (8a),Bestimmen einer Gesamtregenerationsdauer (t) durch Auswerten des Wertes repräsentativ für eine Menge an zugeführten Reduktionsmittel zu dem ersten NOx-Speicherkatalysator (8a), undBetreiben der Abgasnachbehandlungseinrichtung (6) gemäß der Gesamtregenerationsdauer (t) um den ersten NOx-Speicherkatalysator (8a ...

ABGASREINIGUNGSVORRICHTUNG

Diagnosesystem eines Temperaturregelkreises für eine Integration einer ereignisbasierten Abweichung

Ein Abgasbehandlungssystem weist einen Partikelfilter auf, um Partikelmaterial von hindurchströmendem Abgas zu sammeln. Ein Regenerationsmodul führt einen Regenerationsbetrieb aus, der den Partikelfilter regeneriert. Der Regenerationsbetrieb erzeugt ein exothermes Ereignis, das den Partikelfilter über eine Zieltemperatur heizt, die das Partikelmaterial verbrennt. Zumindest ein Temperatursensor ist benachbart dem Partikelfilter angeordnet, um zumindest eine Temperatur des Abgases zu ermitteln. Das Abgasbehandlungssystem weist ferner ein Temperaturdiagnosemodul auf, um ein Temperaturprofil des Partikelfilters auf Grundlage der Temperatur des Abgases zu ermitteln. Das Temperaturdiagnosemodul ermittelt ferner eine Temperaturabweichung des Partikelfilters auf Grundlage eines Vergleichs zwischen dem Temperaturprofil und einer Zieltemperatur. Das Temperaturdiagnosemodul diagnostiziert den Regenerationsbetrieb auf Grundlage einer Mehrzahl von Temperaturabweichungen und einer geregelten Zeitperiode ...

Abgasreinigung für einem Verbrennungsmotor

Energiegewinnungssystem unter Verwendung einer Festoxidbrennstoffzelle auf der Abgasseite einer Brennkraftmaschine

Vorrichtung zum Einbringen von Kraftstoff in einen Abgasstrang

Die vorliegende Erfindung betrifft eine Vorrichtung (1) zum Einbringen von Kraftstoff in einen Abgasstrang (4) einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug, mit einer Einspritzdüse (2) zum Einspritzen von unter Einspritzdruck stehenden Kraftstoff in den Abgasstrang (4) durch eine Radialöffnung (5) in einem Rohrabschnitt (3) des Abgasstrangs (4). DOLLAR A Um die Leistungsfähigkeit einer derartigen Vorrichtung (1) zu verbessern, ist die Einspritzdüse (2) mit einem Kühlmittelkreis (7) wärmeübertragend gekoppelt.

ZIKONIUMOXID ENTHALTENDE VORRICHTUNG ZUR PLASMAGESTÜTZTEN GASBEHANDLUNG

Static mixer for exhaust system of internal combustion engine, has flow conducting surfaces arranged at web materials so that surfaces are arranged with cells at their diverting side and extend in direction of flow in tube

A mixer has a wall structure (10) arranged transverse to the direction of flow in a tube. The structure has a set of layers (11) of wave-shaped web materials (12), where the layers lie transverse to the direction of flow. The adjacent layers are formed between the web materials by flowable cells (13). The materials have flow conducting surfaces (14), which are arranged at the web materials so that the surfaces are arranged with the cells at their diverting side and extend in the direction of flow as well as transverse to the direction of flow. An independent claim is also included for an exhaust gas treatment device for an exhaust system of an internal combustion engine.

Fuel injection system for use in e.g. diesel internal combustion engine, has pressure regulating valve that is arranged between check valve and dosing valve and is connected with system by outlet

The system has a high pressure pump delivering fuel into an accumulator and charged under pressure. An injector is connected with the accumulator, and injects the fuel from the accumulator into a combustion chamber of an internal combustion engine. An injection nozzle is attached to an exhaust gas system, and is connected with the system by an inlet, where a check valve (39) and a dosing valve are provided in the inlet. A pressure regulating valve (41) is arranged between the check valve and the dosing valve, and is connected with the system by an outlet (37). An independent claim is also included for charging fuel in an exhaust gas system of an internal combustion engine for an injection system.

Verfahren zur Nachbehandlung von Abgasen von Brennkraftmaschinen und Einrichtung hierfür

The invention relates to a method and a device for the aftertreatment of exhaust gases of internal combustion engines, especially for reducing the NOx-part of the exhaust gases. According to the invention, the NOx is reduced in the presence of O2 by means of a reducing agent (K). The invention is characterised in that at least one part of the NOx or NO in the exhaust gas is transformed into NO2 before the reduction of the NOx.

Dosing system for injecting fluid into exhaust tract of internal combustion engine, comprises pumping unit, which is hydraulically connected with fuel injection system

The dosing system is connected with a fuel injection system, which is formed for injecting fuel under pressure into a combustion chamber. The dosing system comprises a pumping unit (4), which is hydraulically connected with the fuel injection system, such that the fluid is injected into the exhaust tract by pressure produced in the fuel injection system.

Verfahren zum Regenerieren eines Abgasreinigungsfilters sowie Verdampfer

Ein Verfahren zum Regenerieren eines Abgasreinigungsfilters, insbesondere für Verbrennungsmotoren, mittels einer in den Abgasstrom einzubringenden verdampften Flüssigkeit sieht vor, daß die Oberflächentemperatur des Heizelements auf maximal 700 bis 750° begrenzt wird.

Improved Fuel Vaporiser System

A system and method for the conversion of nitrogen Oxides in an exhaust treatment device at low temperature

An emission control system for an engine

Exhaust fluid treatment apparatus funtionality check

SCR doser spray atomization

Exhaust gas control apparatus for internal combustion engine

An exhaust gas control apparatus for an internal combustion engine includes a NOx occlusion reduction catalyst 6 and an electronic control unit 20, which carries out a low flow rate reduction treatment when a fuel supply from a fuel injection device 4 into the engine is stopped and a flow rate of exhaust gas supplied to the catalyst is smaller than during operation of the engine. The electronic control unit controls a fuel addition valve 7, located on an exhaust passage 5 upstream the catalyst, and an inflow gas adjustment device 2 to control the ratio of oxygen to fuel added to the catalyst. When the catalyst temperature is below a predetermined temperature (such as a catalyst activation temperature), the ratio of oxygen to fuel (air/fuel ratio) is higher than when the catalyst temperature is equal to or higher than the predetermined temperature. The inflow gas adjustment device may be an intake air throttle valve.

Systems and methods for purging reductant from a reductant injector

A reductant insertion system for inserting reductant into an aftertreatment system via a reductant injector comprises a reductant insertion assembly comprising a pump operatively coupled to the reductant injector via a reductant delivery line. A compressed gas source is operatively coupled to the reductant injector and provides a compressed gas to the reductant injector for gas assisted delivery of the reductant. A controller is operatively coupled to the compressed gas source and the reductant insertion assembly and configured to determine whether there is a reductant demand for the reductant. In response to there being no reductant demand, the controller stops the pump and activates the compressed gas source for a predetermined time so as to provide compressed gas to the reductant injector at a pressure sufficient to force reductant contained in the reductant injector upstream towards the reductant insertion assembly via the reductant delivery line while the pump is stopped.

Exhaust fluid treatment apparatus fumctionality check

Systems and methods for SCR feedgas diagnostics

A method for diagnosing feedgas generation capacity of an oxidation catalyst (202, fig 2) in an exhaust aftertreatment system comprises determining a first temperature value upstream of an oxidation catalyst and a second temperature value downstream of the oxidation catalyst, where the oxidation catalyst is upstream of a selective catalytic reduction catalyst (106, fig 1). Hydrocarbon is intrusively (adjustable near real-time) dosed based on a hydrocarbon dosing parameter indicative of conditions for running a feedgas generation capacity diagnostic. An in-use temperature signature across the oxidation catalyst is determined based on the first and second temperature values. A fault status indication is provided comprising a determined feedgas generation fault condition. An exhaust aftertreatment system comprises an oxidation catalyst upstream of a selective catalytic reduction catalyst. A doser fluidly coupled to the oxidation catalyst is communicatively coupled to a diagnostic hydrocarbon ...

An electronic engine management system and method for a truck mounted forklift

A truck mounted forklift (TMFL) electronic engine management system (EEMS) determines (i) when the amount of particulate matter (PM) in the diesel particulate filter (DPF) is above a first predetermined level, PL1; (ii) latch the engine into a DPF regeneration mode, causing the engine to automatically enter DPF regeneration mode each time the engine is turned on until the PM level is below a first regenerated level, RL1; and (iii) unlatch the engine from DPF regeneration mode once the amount of PM in the DPF is below RL1. Several predetermined PM levels are disclosed, which cause various responses including parked DPF regeneration, de-rated vehicle performance and a service level where the machine will not operate. The parking brake may automatically be applied in some modes.

Gas purification

Scr doser spray atomization

System and method for controlling temperature of exhaust gas at inlet of selective catalytic reduction system

PROCEDURE FOR NACHEINSPRITZUNG HYDROCARBONS SUITABLE BY FOR RECOVERY, ALCOHOLS AND/OR REDUCING AGENTS (E.G. DIESEL FUEL AND/OR UREA AND/OR AMMONIAKALI SOLUTION) TO THE REGENERATION OF EXHAUST FILTER SYSTEMS IN DIESEL ENGINES

MEMORY FOR AN EXHAUST SUBSEQUENT TREATMENT MEDIUM OF A ABGASNACHB EHANDLUNGSEINRICHTUNG FOR VEHICLES WITH DIESEL COMBUSTION ENGINES

AMMONIA PRODUCER, VEHICLE AND PROCEDURE FOR THE PRODUCTION OF AMMONIA

PROCEDURE FOR THE CLEANING OF EXHAUST GASES OF A COMBUSTION ENGINE

DESULPHURISATION STRATEGY FOR NOX ADSORBENTS WITH REFORMERTEMPERATURVERWALTUNG

DEVICE AND PROCEDURE FOR THE CONTROL OF WASTE GAS EMISSIONS OF AN INTERNAL-COMBUSTION ENGINE

DEVICE AND PROCEDURE FOR THE DECREASE OF A GAS COMPONENT IN THE EXHAUST GAS STREAM OF A COMBUSTION ENGINE

EMISSION CONTROL SYSTEM FOR A COMBUSTION ENGINE

PROCEDURE FOR THE OPERATION OF A TEST CENTRAL METERING VALVE AND A DEVICE FOR THE EXECUTION OF THE PROCEDURE

REGENERATION SYSTEM OF A CATALYST PARTICLE FILTER IN A DIESEL ENGINE EXIT GAS LINE

CATALYST COMPOSITION AND STRUCTURE FOR A IN AN EXHAUST GAS STREAM ARRANGEMENT THE SAME TRI LEVELS OF REFORMER

EXHAUST PLANT FOR AN IMPROVED REDUCTION OF NITROGEN OXIDES AND PARTICLES OF A DIESEL ENGINE

DEVICE FOR INJECTING A FLUID FOR AN OFF-GAS TREATMENT DEVICE

EXHAUST DISTANCE OF AN INTERNAL-COMBUSTION ENGINE AND A PLANT TO THE EMISSION CONTROL

IMPROVEMENTS DURING THE DIESEL PARTICLE DELIMITATION

PROCEDURE FOR REGENERATING AN EMISSION CONTROL FILTER AS WELL AS EVAPORATOR

EMISSION CONTROL DEVICE FOR A COMBUSTION ENGINE AND PROCEDURE FOR YOUR CONTROL

REGENIERUNG OF DUST COLLECTOR, IN PARTICULAR FOR DIESEL ENGINES.

MULTI-ZONE MEMORY CATALYST AND PROCEDURE FOR ITS PRODUCTION AND ITS USE

PROCEDURE FOR THE DISTANCE OF NITROGEN OXIDES AND SOOT PARTICLES FROM THE LEAN EXHAUST GAS OF A COMBUSTION ENGINE

DIESEL ENGINE EMISSION CONTROL SYSTEM

PROCEDURE AND DEVICE FOR THE TREATMENT OF BURN EXHAUST GASES

Method and Equipment for Selective Catalytic Reduction of NOx by Using Methanol as Reducing Agent

The invention relates to a method and a equipment for selective catalytic reduction of NOx by using methanol as a reducing agent, wherein the equipment comprises a methanol-SCR post processor, a MMOC post-processor, a methanol injection equipment, a temperature sensor, a NOx sensor and a methanol injection equipment, wherein the methanol-SCR post-processor and the MMOC post-processor is disposed on an exhaust pipe of an engine, the methanol injection equipment are disposed in the upstream of the methanol-SCR post-processor, the temperature sensor that is disposed in the upstream of the methanol-SCR post-processor, and the NOx sensor and a methanol injection equipment that are disposed in the downstream of the methanol-SCR post-processor. Compared wit the prior art, the invention has the advantage at: the reduction characteristic of methanol is fully utilized; since the methanol is a kind of hydrocarbons, it can serve as a reducing agent, and efficiently complete the selective catalytic ...

Exhaust gas purification apparatus

An exhaust gas purification apparatus configured to purify exhaust gas discharged from an internal combustion engine includes an exhaust passage 5 connected to the internal combustion engine, a fuel-additive valve configured to inject fuel toward the exhaust passage, an internal wall having a cylindrical shape and forming an injection passage that communicates with the exhaust passage and through which the fuel injected from fuel-additive valve passes, and an external wall disposed radially outside the internal wall and cooperating with the 10 internal wall to form an introduction path. The introduction path is configured to introduce the exhaust gas flowing in the exhaust passage into a region of the injection passage on aside close to the fuel-additive valve. The introduction path extends along a circumference of the internal wall. c', ...

Method for nox reduction

Method of decomposing nitrogen dioxide

LIQUID ATOMIZATION SYSTEM FOR AUTOMOTIVE APPLICATIONS

Exhaust cleaning device for internal combustion engines

METHOD FOR PURIFICATION OF EXHAUST GAS FROM INTERNAL-COMBUSTION ENGINE

Provided is a method for extending a temperature range enabling combustion of high concentration hydrocarbon, or for rapidly supplying high temperature gas to a later stage catalyst. Provided is a method for purification of exhaust gas from an internal-combustion engine comprised by: providing a temperature-raising catalyst for exhaust gas from an internal-combustion engine in an exhaust gas passage of the internal-combustion engine, along flow of said exhaust gas, at the upstream side of a purification catalyst for said exhaust gas; and introducing hydrocarbon in an amount of 1,000 to 40,000 ppm, as converted to methane, from the upstream side of the temperature-raising catalyst, wherein said temperature-raising catalyst has catalytically active components supported onto a refractory three-dimensional structure, wherein concentration of said components has a gradient such that said concentration gradually becomes lower from the inflow side toward the outflow side of said exhaust gas.

INTEGRATED APPARATUS FOR REMOVING POLLUTANTS FROM A FLUID STREAM IN A LEAN-BURN ENVIRONMENT WITH HEAT RECOVERY

An apparatus and method to treat fluid streams, and in particular emissions from lean-burn engines such as diesel engines, are disclosed, which use multiple catalysts chosen to remove hydrocarbons, carbon monoxide, particulate matter, and oxides of nitrogen. The apparatus and method also provide for heat exchange between the inlet and outlet exhaust streams to sustain the catalyzed reactions, by placing the catalysts in the temperature zones where their operation is enhanced, and they also allow for regeneration of a filter used to trap particulate matter in the streams.

EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE

Inside an engine exhaust passage, in order from the upstream side, a hydrocarbon feed valve (16), oxidation catalyst (13), and exhaust purification catalyst (14) are arranged. A first NO X purification method which lowers the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (14) by a predetermined period while maintaining it lean so as to remove NO X without causing NO X to be stored in the form of nitrates and a second NO X purification method which switches the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (14) from lean to rich by a period longer than the above period so as to remove NO X are selectively used in accordance with an operating state of the engine.

SYSTEM AND METHOD FOR SUPPLYING OXYGENATE REDUCTANTS TO AN EMISSION TREATMENT SYSTEM

The invention provides a method for supplying reductants to an emission treatment unit (32) including supplying a first premixed fuel stream (14) to an engine (12), wherein the engine is configured to create an exhaust stream (30). A second premixed fuel stream (20) is supplied to a separation unit (18), wherein the first and second premixed fuel streams (14, 20) each comprise an oxygenate reductant component and a primary fuel component. At least a portion of the second premixed fuel stream is separated into a first fraction stream (42) and a second fraction stream (44) via the separation unit, wherein the first fraction stream comprises a higher concentration of the oxygenate reductant component than the second fraction stream, and supplying the first fraction stream to an emission treatment unit to treat the exhaust stream. The invention further provides a system to carry out said method.

EXHAUST CATALYST PRE-HEATING SYSTEM AND METHOD

A system and method according to which exhaust is directed from a stationary exhaust source and through a burner, and a combustible fluid is vented from at least one combustible fluid source other than the stationary exhaust source. The combustible fluid is captured and directed to flow from the combustible fluid source and towards the burner, and at least air is mixed with the captured combustible fluid to form a mixture. The mixture is introduced into the burner and burned therein to thereby pre-heat the exhaust flowing therethrough. The pre-heated exhaust contacts a catalyst.

MANAGEMENT OF THERMAL FLUCTUATIONS IN LEAN NOX ADSORBER AFTERTREATMENT SYSTEMS

A method and apparatus for managing heat in exhaust gas in an aftertreatment system that uses a lean NOx adsorber is disclosed. A de-sulfation hot line and cooling line are used to control exhaust gas temperatures for adsorption, regenenation and de-sulfation cycles of the aftertreatment system where each cycle may require different chemical and exhaust gas temperatures independent of the engine operation. The method and apparatus includes a SOx adsorber to provide greater durability for the subject invention.

COMPOSITION MADE FROM UREA FOR TREATING EXHAUST GASES

Composition aqueuse comprenant un agent réducteur des NOx ou un précurseur d'un tel agent, notamment de l'urée, et au moins une paraffine dispersée dans la phase aqueuse. Une telle composition permet de réduire la formation de dépôts dans une ligne d'échappement SCR tout en évitant de mousser lors de sa manipulation.

EXHAUST GAS TREATMENT SYSTEM AND EXHAUST GAS PURIFICATION METHOD

METHOD AND APPARATUS FOR REDUCING EMISSIONS IN DIESEL ENGINES

A method of reducing emissions from a diesel engine including the steps of providing an injector to an exhaust outlet of the diesel engine, the injector having an orifice with a diameter of about 0.006 inch or less, providing a reagent to the injector at an inlet pressure between about 120 psi and about 60 psi, actuating the injector on and off at a frequency between about 10 Hz and about 1 Hz with an on-time of about 1 % or more, injecting the reagent via the orifice into the exhaust outlet at an injection rate, and wherein varying of at least two of the inlet pressure, the frequency, and the on-time achieves a turn-down ratio of a maximum injection rate to a minimum injection rate of at least about 31 :1.

System and Methods for Skip Fire Engine with a Lean NOx Trap

Systems and methods for skip fire spark ignition engine operation with a lean NOx trap after-treatment are provided. This system includes engine control circuitry capable of fueling and firing subsets of the engine's cylinders. Other cylinders are not provided fuel and are not fired (i.e. “skip fired”). The system includes an exhaust manifold for channeling the exhaust from at least some cylinders through a multistage catalytic converter. This may include a standard two-way or three-way catalytic converter. From the catalytic converter the exhaust may be channeled through a lean NOx trap. The lean NOx trap is able to chemically absorb the NOx emissions for regeneration according to a regeneration protocol. Lean NOx traps may include a substrate, an absorption material (also referred to as a ‘sorbent’) and a catalyst. The regeneration protocol may include monitoring NOx emissions downstream from the lean NOx trap, and comparing them against either a threshold or a lean NOx trap saturation model. Once the NOx emissions reach the threshold, or deviate from the model, a regeneration cycle may be performed.

Methods for engine exhaust nox control using no oxidation in the engine

A powertrain includes an internal combustion engine having a combustion chamber and an aftertreatment system. A method for reducing NOx emissions in the powertrain includes monitoring an actual exhaust gas feedstream ratio of NO 2 to NO, monitoring a desired exhaust gas feedstream ratio of NO 2 to NO, comparing the actual and the desired exhaust gas feedstream ratios of NO 2 to NO, and selectively initiating a NO 2 generation cycle based upon the comparison of the actual and the desired exhaust gas feedstream ratios of NO 2 to NO comprising injecting fuel mass into the combustion chamber after a primary combustion event.

Internal combustion engine

Internal combustion engine according to the invention comprises an exhaust treatment apparatus provided in an exhaust passage, a burner apparatus provided upstream of the exhaust treatment apparatus for increasing exhaust temperature, and a variable mechanism for varying valve timing of an exhaust valve. The variable mechanism is controlled in such a manner that, when a flow amount of exhaust gas passing through the burner apparatus is equal to or more than a predetermined value, the exhaust valve opens in the middle of piston descending during an expansion stroke. When the exhaust valve is opened at this timing, high-temperature exhaust or combustion gas existing in combustion chamber at this time is sent to the burner apparatus, making it possible to increase atmosphere gas temperature of the burner apparatus. Therefore, even when flow amount of exhaust gas is increased to the predetermined value or more, sufficient ignition performance can be ensured.

System for introducing fuels into the exhaust tract of a motor vehicle, and fuel vaporizer for the same

The invention relates to a system for introducing fuel into the exhaust line of a motor vehicle, having a fuel evaporator with a housing, which has an inlet and an outlet, and a heating device arranged in the housing, and a pump for pumping fuel into the fuel evaporator via the inlet. Provision is made for an inlet of the pump to be connected to a branching, which encompasses a first branch for supplying fuel and a second branch for supplying air. The invention further relates to a fuel evaporator for such a system

Diesel-exhaust-fluid refill detection

A method is provided for detecting a level of diesel-exhaust-fluid (DEF) in a reservoir that is operatively connected to a catalyst for a diesel engine. The method is employed in a vehicle in order to facilitate a refill of the reservoir. The method includes sensing a level of diesel fuel in a fuel tank via a sensor operatively connected to the tank. The method also includes determining whether the vehicle is on an incline using the sensed level of diesel fuel in the fuel tank. The method additionally includes determining the level of DEF in the reservoir if the vehicle is determined to be substantially not on an incline. A system is also provided for detecting a level of DEF in the reservoir.

Exhaust purifying apparatus for internal combustion engine

Degradation of ignition means due to combustion of foreign objects attached to the ignition means is suppressed. There are provided a fuel supplying apparatus for supplying fuel into an exhaust passage in an internal combustion engine, a heating apparatus for burning the supplied fuel, and a controller. The controller, in a case where unburned components of an exhaust gas are deposited in the heating apparatus, burns the deposited unburned components by the heating apparatus for removal before increasing a temperature of the exhaust gas by igniting the fuel supplied from the fuel supplying apparatus by the heating apparatus.

Motor Vehicle Having a Storage Tank for a Reducing Agent

A motor vehicle includes a tank for storing a liquid reducing agent suppliable to the exhaust system of an internal-combustion engine, and an air delivery device, by which an excess pressure can be built-up in a cushion of air situated in the tank above the reducing agent level. Via the air delivery device, alternatively, a vacuum is generatable in the air cushion, which vacuum supports feeding of the agent into the tank. Via the vacuum in the air cushion, reducing agent can also be returned from a pipe, which leads the reducing agent to the exhaust system, back into the tank, and/or additional liquid reducing agent can be transferred from a storage tank by way of a supply duct.

Valve arrangement for metering a fluid medium in an exhaust line of an internal combustion engine

The invention relates to a valve arrangement ( 2 ) for metering a fluid medium into an exhaust line ( 22 ), comprising a valve seat ( 10 ) which acts together with a closing body ( 12 ) and in which a valve passage ( 14 ) is implemented, and a perforated disc ( 6 ) that is disposed downstream of the valve seat, closes off the valve passage, and has at least one axial hole ( 8 ) in the area of the valve passage through which the fluid medium can be injected into the exhaust line ( 22 ). The valve arrangement further comprises a connecting flange ( 16 ) for connecting the valve arrangement ( 2 ) to the exhaust line ( 22 ) in a fluid-tight manner, wherein the perforated disc ( 6 ) extends from the valve passage to the connecting flange and is implemented such that said perforated disc seals the connecting flange against the exhaust line in a fluid-tight manner in the installed state. A separate seal is thus no longer required, because the perforated disc performs the sealing function.

System and method for reducing mono-nitrogen oxide emissions

A system for reducing emissions in an engine is provided. The system includes a primary fuel tank having a primary fuel. The system also includes a secondary fuel tank having a secondary fuel. The system further includes a separator in fluid communication with the secondary fuel tank or the primary fuel tank or both the secondary fuel tank and the primary fuel tank, the engine and a hydrocarbon-selective catalytic reduction subsystem. The subsystem separator separates a less volatile portion of the secondary fuel or the primary fuel from a more volatile portion, said less volatile portion of the secondary fuel or the primary fuel in the separator is routed to the hydrocarbon-selective catalytic reduction subsystem and said more volatile portion of the secondary fuel or the primary fuel in the separator is routed to the engine.

Device for discharging exhaust gas from diesel engine, having ammonolysis module

The present invention relates to a device for discharging exhaust gas from a diesel engine by using hydrogen gas, which includes an ammonolysis module. More specifically, the present invention relates to a device for purifying exhaust gas of a diesel engine, wherein the device for discharging exhaust gas from a diesel engine comprises a DOC-DPF-LNT module formed in the downstream of diesel engine in a serial mode, further includes an ammonolysis module; the device for discharging exhaust gas from a diesel engine comprises a DOC-DPF-HC-SCR module formed in the downstream of diesel engine in a serial mode, further includes an ammonolysis module; and the device comprises an LNT-DPF module and an ammonolysis module.

Method and device pertaining to cooling of dosing units of hc dosing systems for exhaust cleaning

A method pertaining to an HC dosing system for exhaust cleaning for an engine which comprise a dosing unit ( 250 ) for fuel. After cessation of an exhaust flow, deciding about a need to cool the fuel dosing unit by use of fuel. Predicting a temperature pattern of the dosing unit ( 250 ) as a basis for deciding. Predicting whether a predetermined temperature of the dosing unit ( 250 ) will be reached after exhaust flow cessation. Also a computer programme product containing programme code (P) for implementing the method. Also an HC dosing system and a motor vehicle which is equipped with the HC dosing system are disclosed.

Exhaust gas purification system for an internal combustion engine

The present invention is intended to suppress, in an exhaust gas purification system for an internal combustion engine capable of mixing and combusting liquid fuel and compressed natural gas, an excessive rise in temperature of an exhaust gas purification device at the time when the exhaust gas purification device is caused to regenerate. In the exhaust gas purification system for an internal combustion engine according to the present invention, when the liquid fuel and the compressed natural gas are caused to mix and combust in the internal combustion engine at the time of regenerating the exhaust gas purification device, an amount of HC to be supplied to the exhaust gas purification device from an HC supply device is decreased in comparison with the time when only the liquid fuel is caused to combust in the internal combustion engine.

Exhaust purification system of internal combustion engine

In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( 15 ) and an exhaust purification catalyst ( 13 ) are arranged. The exhaust purification catalyst ( 13 ) is comprised of an upstream-side catalyst ( 14 a ) and a downstream-side catalyst ( 14 b ) arranged in series at an interval from each other. The upstream-side catalyst ( 14 b ) has a smaller cross-sectional area than the downstream-side catalyst ( 14 b ). The concentration of hydrocarbons which flow into the upstream-side catalyst ( 14 a ) is made to vibrate by within a predetermined range of amplitude of a 200 ppm or more and within a predetermined range of period of 5 seconds or less, whereby the NO x which is contained in exhaust gas is reduced at the exhaust purification catalyst ( 13 ).

Exhaust system having multiple dosers

An exhaust system for a machine is disclosed. The exhaust system may have a diffuser configured to receive exhaust from an engine. The exhaust system may further have a plurality of dosers associated with the diffuser and configured to inject fuel into the diffuser. The exhaust system may also have a controller configured to selectively control an amount of fuel injected by each of the plurality of dosers based on a velocity of the exhaust adjacent to each doser. In addition, the exhaust system may have an after-treatment component fluidly connected downstream of the diffuser and configured to heat the exhaust by oxidizing the injected fuel.

Exhaust purification system of internal combustion engine

In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( 15 ), an exhaust purification catalyst ( 13 ), and a particulate filter ( 14 ) are arranged. At the time of engine operation, the amplitude of change of the concentration of hydrocarbons which flow into the exhaust purification catalyst ( 13 ) is made to become within a predetermined range of amplitude by control of the injection amount of hydrocarbons from the hydrocarbon feed valve ( 15 ). When the temperature of the particulate filter ( 14 ) is to be raised to be regeneration temperature, the injection amount of hydrocarbons is increased and thereby the pass through amount of hydrocarbons which pass through the exhaust purification catalyst ( 13 ) is increased.

Common rail reductant injection system

An exhaust system including a selective catalytic reduction (SCR) component and an oxidation catalyst component. The exhaust system also includes an exhaust treatment fluid injection system for dispersing an exhaust treatment fluid into an exhaust stream at a location adjacent either the SCR component or the oxidation catalyst component, wherein the exhaust treatment fluid injection device includes a common rail that provides the exhaust treatment fluid under pressure to a plurality of injectors that dose the exhaust treatment fluid into the exhaust stream. The exhaust treatment fluid injection device also includes a return rail for returning unused exhaust treatment fluid to the fluid source.

Air driven reductant delivery system

A dosing system for delivering reductant to an exhaust gas treatment system of an internal combustion engine using air driven hydraulic pumps for closed-loop controlling reductant pressure and a two-stage PWM control method for controlling dosing rate. Reductant residue in the dosing systems is purged by using compressed air after a dosing process completes, and when the air driven hydraulic pumps are positioned inside a reductant tank, dedicated heating means for the pumps is not necessary. The air driven hydraulic pumps can also use low pressure compressed air, and the closed-loop pressure control together with the two-stage PWM control allow dosing accuracy insensitive to pressure variations in compressed air. These new features enable the dosing system use a variety of compressed air sources, including an engine turbo.

Exhaust Gas Cleaning Component For Cleaning The Exhaust Gases Of An Internal Combustion Engine

An exhaust gas cleaning component, having a housing with an inflow port and an outflow port, a first honeycomb structure in the housing with a casing, the casing having an outer surface over which exhaust gas can flow, and also having an applicator device by which an exhaust gas cleaning additive can be applied to the outer surface of the casing. 19.-. (canceled)10. An exhaust gas cleaning component , comprising:a housing with an inflow port and an outflow port;a first honeycomb body arranged in the housing;a shell of the first honeycomb body having an outer surface over which exhaust gas can flow within the housing; anda feed device configured to feed an exhaust gas cleaning additive onto the outer surface of the shell.11. The exhaust gas cleaning component as claimed in claim 10 , further comprising:at least one bypass duct formed between the outer surface of the shell and the housing through which duct a partial exhaust gas flow of an exhaust gas flow flowing from the inflow port to the outflow port can bypass the first honeycomb body,wherein the feed device is arranged at the at least one bypass duct and configured so that the exhaust gas cleaning additive is fed into the at least one bypass duct.12. The exhaust gas cleaning component as claimed in claim 11 , further comprising:a second honeycomb body, through which the partial exhaust gas flow flowing through the at least one bypass duct flows, is arranged in the at least one bypass duct upstream of the feed device in an exhaust gas flow direction.13. The exhaust gas cleaning component as claimed in claim 11 , further comprising:a heater arranged in the at least one bypass duct upstream of the feed device in an exhaust gas flow direction and configured to heat the partial exhaust gas flow flowing through the at least one bypass duct.14. The exhaust gas cleaning component as claimed in claim 11 , further comprising:a surface heating system arranged at an impact region of the outer surface of the shell at which ...

EXHAUST GAS CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

An exhaust gas control system includes an upstream purification device disposed in an exhaust passage of the internal combustion engine, a downstream purification device disposed in a portion of the exhaust passage downstream from the upstream purification device, a fuel addition valve disposed in a portion of the exhaust passage upstream from the upstream purification device, and a urea addition valve disposed in a portion of the exhaust passage between the upstream purification device and the downstream purification device, and a cooling device. The cooling device is configured such that refrigerant cools the fuel addition valve first and then cools the urea addition valve subsequent to the fuel addition valve. 1. An exhaust gas control system for an internal combustion engine , the internal combustion engine being a compression ignition-type internal combustion engine operated to perform lean combustion ,the exhaust gas control system comprising:an upstream purification device disposed in an exhaust passage of the internal combustion engine, the upstream purification device including an oxidation catalyst;a downstream purification device disposed in a portion of the exhaust passage downstream from the upstream purification device, the downstream purification device including a selective catalytic reduction catalyst;a fuel addition valve disposed in a portion of the exhaust passage upstream from the upstream purification device, the fuel addition valve being configured to add fuel into exhaust gas of the internal combustion engine;a urea addition valve disposed in a portion of the exhaust passage between the upstream purification device and the downstream purification device, the urea addition valve being configured to add urea aqueous solution into the exhaust gas; anda cooling device having a cooling passage configured to carry refrigerant flowing through the cooling passage, the cooling passage being configured such that the refrigerant cools the fuel addition ...

SYSTEMS AND METHODS FOR PURGING REDUCTANT FROM A REDUCTANT INJECTOR

A reductant insertion system for inserting reductant into an aftertreatment system via a reductant injector comprises a reductant insertion assembly comprising a pump operatively coupled to the reductant injector via a reductant delivery line. A compressed gas source is operatively coupled to the reductant injector and provides a compressed gas to the reductant injector for gas assisted delivery of the reductant. A controller is operatively coupled to the compressed gas source and the reductant insertion assembly and configured to determine whether there is a reductant demand for the reductant. In response to there being no reductant demand, the controller stops the pump and activates the compressed gas source for a predetermined time so as to provide compressed gas to the reductant injector at a pressure sufficient to force reductant contained in the reductant injector upstream towards the reductant insertion assembly via the reductant delivery line while the pump is stopped. 1. A reductant insertion system for inserting reductant into an aftertreatment system via a reductant injector , the reductant insertion system comprising:a reductant insertion assembly comprising a pump operatively coupled to the reductant injector via a reductant delivery line and configured to pump the reductant to the reductant injector;a compressed gas source operatively coupled to the reductant injector and configured to provide a compressed gas to the reductant injector for gas assisted delivery of the reductant through the reductant injector; and determine whether there is a reductant demand for the reductant,', 'in response to determining that there is no reductant demand, stop the pump, and', 'activate the compressed gas source for a predetermined time so as to provide the compressed gas to the reductant injector, at a pressure sufficient to force reductant contained in the reductant injector upstream towards the reductant insertion assembly via the reductant delivery line while the ...

EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE

An internal combustion is configured such that a hydrocarbon supply valve () and an exhaust gas purification catalyst () are arranged in an engine exhaust gas passage and such that NOcontained within exhaust gas is purified by spraying hydrocarbon from the hydrocarbon supply valve () at predetermined intervals. When SOis to be released from the exhaust gas purification catalyst (), the air-fuel ratio of exhaust gas which flows into the exhaust gas purification catalyst () is enriched by generating, within a cylinder, combustion gas having a rich air-fuel ratio, and after that the air-fuel ratio of exhaust gas which flows into the exhaust gas purification catalyst () is enriched by supplying hydrocarbon from the hydrocarbon supply valve (). 1. An exhaust purification system of an internal combustion engine in which an exhaust purification catalyst is arranged in an engine exhaust passage , a hydrocarbon feed valve is arranged in the engine exhaust passage upstream of the exhaust purification catalyst , precious metal catalysts are carried on exhaust gas flow surfaces of the exhaust purification catalyst , basic exhaust gas flow surface parts are formed around the precious metal catalysts , the exhaust purification catalyst has a property of reducing NOwhich is contained in the exhaust gas if making a concentration of hydrocarbons flowing into the exhaust purification catalyst vibrate within a predetermined range of amplitude and within a predetermined range of period and has a property of being increased in storage amount of NOwhich is contained in the exhaust gas if making a vibration period of the hydrocarbon concentration longer than the predetermined range , and NOcontained in the exhaust gas is removed by injecting hydrocarbons from the hydrocarbon feed valve within said predetermined range of period , wherein as rich control for making an air-fuel ratio of an exhaust gas flowing into the exhaust purification catalyst rich , cylinder rich control for generating ...

EXHAUST GAS CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD FOR EXHAUST GAS CONTROL SYSTEM

An exhaust gas control system includes a NSR catalyst, a fuel supply valve, a SCR catalyst an addition device, and an electronic control unit. When temperature of NSR catalyst is in a rage of a predetermined first temperature range and temperature of SCR catalyst is in a rage of a predetermined second temperature range, the electronic control unit is configured to add additive with the addition device, and execute predetermined air-fuel ratio processing to control the air-fuel ratio of exhaust gas flowing into the NSR catalyst. In the predetermined air-fuel ratio processing, the electronic control unit is configured to execute a second air-fuel ratio processing after a first air-fuel ratio processing, and execute the third air-fuel ratio processing after a first air-fuel ratio processing and the second air-fuel ratio processing and in succession to the second air-fuel ratio processing. 1. An exhaust gas control system for an internal combustion engine , the exhaust gas control system comprising:a NOx storage reduction catalyst provided in an exhaust passage of the internal combustion engine;a fuel supply valve configured to supply fuel to exhaust gas flowing into the NOx storage reduction catalyst so as to adjust an air-fuel ratio of the exhaust gas flowing into the NOx storage reduction catalyst;a selective catalytic reduction catalyst provided on a downstream side of the NOx storage reduction catalyst in the exhaust passage, the selective catalytic reduction catalyst being configured to selectively reduce NOx with ammonia as a reducing agent;an addition device configured to add one of ammonia and a precursor of ammonia as an additive to the exhaust gas flowing into the selective catalytic reduction catalyst; andan electronic control unit configured to control the exhaust gas control system,{'sub': ';', 'claim-text': the predetermined first temperature range being a temperature range in which the NOx storage reduction catalyst is capable of reducing NOx,', 'the ...

Diesel fuel dosing module for regeneration of diesel particualte filters with continuous purging

Various example embodiments relate to a system that includes a nozzle. A dosing line is connected to the nozzle and a fuel dosing module. The fuel dosing module is in fluid communication with the dosing line and includes an outlet in fluid communication with the dosing line. An air inlet is positioned upstream of the outlet and is configured to receive air. A fuel inlet is positioned upstream of the outlet and is configured to receive fuel. A fuel valve is positioned upstream of the outlet and downstream of the fuel inlet and is configured to control the flow of fuel. The fuel dosing module is configured to combine the fuel and the air upstream of the outlet and downstream of the fuel valve to generate an air-fuel fluid, wherein the air-fuel fluid removes particles from the nozzle.

METHODS FOR OPERATION OF AN EMISSIONS AFTERTREATMENT SYSTEM FOR NOX CONTROL DURING REGENERATION OF DIESEL PARTICULATE FILTER

The present disclosure describes methods for operating an EAS including a close coupled SCR unit, a downstream SCR unit, a diesel oxidation catalyst unit (DOC) and a diesel particulate filter (DPF). The methods utilize the close coupled SCR unit to manage NOx emissions from the EAS during regeneration of a diesel particulate filter (DPF). 1. A method of operating an emissions aftertreatment system (EAS) including a close coupled SCR unit and a downstream SCR unit , the method comprising:actively regenerating a diesel particulate filter (DPF) unit of the EAS by oxidizing soot in the DPF unit; andflowing diesel exhaust fluid into an exhaust gas from an internal combustion engine between the close coupled SCR unit and the DPF unit; and flowing diesel exhaust fluid into the exhaust gas upstream of the close coupled SCR unit,', 'introducing thermal energy to the exhaust gas downstream of where the diesel exhaust fluid flows into the exhaust gas stream and upstream of the close coupled SCR unit,', 'adjusting the temperature of the exhaust gas flowing into the close coupled SCR unit, and', 'reducing an overall NOx content of the exhaust gas in the close coupled SCR unit, over 70 percent of the reduction in the overall NOx content of the exhaust gas provided by the close coupled SCR unit., 'during the oxidizing soot in the DPF unit2. The method of claim 1 , wherein the introducing thermal energy to the exhaust gas downstream of where the diesel exhaust fluid flows into the exhaust gas stream and upstream of the close coupled SCR unit includes introducing thermal energy to the exhaust stream utilizing an electric heater.3. The method of claim 1 , further comprising sensing a concentration of a combined amount of NOx and ammonia in the exhaust gas upstream of the closed coupled SCR unit.4. The method of claim 1 , further comprising sensing a concentration of a combined amount of NOx and ammonia in the exhaust gas downstream of the closed coupled SCR unit and upstream of the ...

EXHAUST GAS AFTERTREATMENT SYSTEM AND METHOD FOR EXHAUST GAS AFTERTREATMENT IN AN INTERNAL COMBUSTION ENGINE

An exhaust gas aftertreatment system for an internal combustion engine has an exhaust system that can be connected to an outlet of the internal combustion engine. A three-way catalytic converter that is situated close to the engine and, downstream from the three-way catalytic converter that is situated close to the engine, a second catalytic converter and a particle reduction device are arranged in the direction in which an exhaust gas of the internal combustion engine flows through an exhaust gas channel of the exhaust system. A fuel injector is arranged on the exhaust gas channel so as to inject fuel downstream from the three-way catalytic converter that is situated close to the engine and upstream from the second catalytic converter, and the exhaust system comprises a secondary air system with which secondary air can be blown into the exhaust gas channel downstream from the three-way catalytic converter that is situated close to the engine and upstream from the second catalytic converter. 110. An exhaust gas aftertreatment system for an internal combustion engine () comprising:an exhaust system in which a three-way catalytic converter that is situated close to the engine and, downstream from the three-way catalytic converter that is situated close to the engine, a second catalytic converter, and a particle reduction device are arranged in a direction in which an exhaust gas of the internal combustion engine flows through an exhaust gas channel of the exhaust system, anda fuel injector arranged on the exhaust gas channel and configured so as to inject fuel downstream from the three-way catalytic converter that is situated close to the engine and upstream from the second catalytic converter, andwherein the exhaust system comprises a secondary air system with which secondary air can be blown into the exhaust gas channel downstream from the three-way catalytic converter (that is situated close to the engine and upstream from the second catalytic converter.2. The ...

Exhaust purification system for internal combustion engine

In an internal combustion engine, an exhaust purification catalyst and a hydrocarbon feed valve are arranged in an exhaust passage. When the air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst should be made rich, rich control, which makes the air-fuel ratio of the exhaust gas which is exhausted from the combustion chamber rich, is performed. In order to prevent clogging of the hydrocarbon feed valve, clogging preventing injection which injects hydrocarbons from the hydrocarbon feed valve by an injection interval ΔtCB is performed. The exhaust purification catalyst has an oxygen storage ability. At the initial period of rich control, clogging preventing injection is performed by a shorter injection interval ΔtCS.

SYSTEM AND METHOD FOR DETECTING RELEASE FROM AN INJECTOR

Methods and systems for operating an engine that includes a catalyst and a particulate filter are described. In one example, release of reductant from an injector may be determined according to a plurality of metrics so that reliability of a release indication may be improved. In addition, operation of an engine may be adjusted responsive to the release indication so that exhaust system temperatures may be maintained. 1. An engine operating method , comprising:injecting a reductant into an exhaust system of an engine upstream of a diesel exhaust catalyst via an injector;deactivating the injector and generating a plurality of metrics via a controller in response to an amount of carbonaceous soot stored in a diesel particulate filter being less than a threshold amount or a temperature of the diesel particulate filter being greater than a threshold temperature, the plurality of metrics including an oxygen concentration difference and a temperature difference across an emissions device; andadjusting engine operation in response to a release of reductant from the injector after the injector is deactivated, where the release is determined based on the plurality of metrics being compared to one or more thresholds that are functions of one or more engine parameters.2. The engine method of claim 1 , where the one or more engine parameters include ambient pressure and temperature claim 1 , exhaust flow claim 1 , and feed gas temperature.3. The engine method of claim 1 , where the oxygen concentration difference is an oxygen concentration difference across a reductant injector.4. The engine method of claim 3 , where the temperature difference across the emissions device is a temperature difference across a diesel exhaust catalyst.5. The engine method of claim 1 , where the emissions device is a diesel exhaust catalyst claim 1 , and where the plurality of metrics further includes a metric of a temperature difference across both of the diesel particulate filter and the diesel ...

Method and system for use when correcting supply of an additive to an exhaust gas stream

The present invention relates to a method for correcting a supply of additive to an exhaust gas stream resulting from combustion in an internal combustion engine. A first aftertreatment component being arranged for oxidation of nitric oxide into nitrogen dioxide, and a reduction catalytic converter being arranged downstream said first aftertreatment component. Additive is supplied to said exhaust gas stream for reduction of nitrogen oxides in said reduction catalytic converter, the additive being supplied in proportion to an occurrence of nitrogen oxides in said exhaust gas stream, said proportion being subject to correction. The method includes: supplying unburned fuel to said exhaust gas stream upstream said first aftertreatment component to reduce oxidation of nitric oxide into nitrogen dioxide in said first aftertreatment component, and correcting said supply of additive to said exhaust gas stream when supplying unburned fuel to said exhaust gas stream.

EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE

In an internal combustion engine, an exhaust purification catalyst, hydrocarbon feed valve, and particulate filter are arranged in an exhaust passage. Hydrocarbons are injected from the hydrocarbon feed valve by a predetermined period so as to remove NOX which is contained in the exhaust gas in first NOX removal method. While doing this, the particulate matter which is trapped on the particulate filter is removed by raising the temperature of the particulate filter in temperature elevation control. At this time, the hydrocarbon injection for the first NOX removal method is performed by the predetermined period at the preset injection pressure. During the time period when the hydrocarbon injection for the first NOX removal method is not being performed, the hydrocarbon injection for the temperature elevation control is performed by an injection pressure which is set lower than the preset injection pressure. 1. An exhaust purification system of an internal combustion engine in which an exhaust purification catalyst is arranged in an engine exhaust passage and a hydrocarbon feed value is arranged upstream of the exhaust purification catalyst in the engine exhaust passage , a precious metal catalyst is carried on an exhaust gas flow surface of the exhaust purification catalyst and a basic exhaust gas flow surface part is formed around the precious metal catalyst , said exhaust purification catalyst has the property of reducing the NOwhich is contained in the exhaust gas when making the concentration of hydrocarbons which flow into the exhaust purification catalyst vibrate by within a predetermined range of amplitude and within a predetermined range of period and has the property of being increased in amount of storage of NOwhich is contained in the exhaust gas if making the vibration period of the hydrocarbon concentration longer than said predetermined range , NOwhich is contained in the exhaust gas is removed by injecting hydrocarbons from the hydrocarbon feed valve ...

Exhaust emission control system of engine

An exhaust emission control system of an engine is provided including a NO x catalyst for oxidizing HC and storing NO x within exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the NO x when the air-fuel ratio is approximately stoichiometric or rich. The system includes a SCR catalyst for purifying NO x by causing a reaction with NH 3 , a urea injector, a fuel injection controlling module, and a processor configured to execute a NO x reduction controlling module for performing a NO x reduction control to enrich the air-fuel ratio to reach a target ratio. When the urea injection is determined to be abnormal, the NO x reduction controlling module performs a NH 3 -supplied NO x reduction control in a state where a larger amount of unburned fuel than the amount of unburned fuel in the exhaust passage in the NO x reduction control is supplied to the exhaust passage.

REDUCTANT DELIVERY UNIT FOR AUTOMOTIVE SELECTIVE CATALYTIC REDUCTION WITH OPTIMIZED FLUID HEATING

A reductant delivery unit reduces nitrogen oxide (NOx) emissions from a vehicle. The delivery unit includes a solenoid operated fluid injector having a fluid inlet and a fluid outlet. The inlet receives a source of reducing agent and the outlet communicates with an exhaust gas flow path of the vehicle so that the fluid injector controls injection of the reducing agent into the exhaust gas flow path. The fluid injector has an inlet tube for directing the reducing agent between the inlet and the outlet. A coil heater is integral with the fluid injector and is constructed and arranged, when energized, to inductively heat the inlet tube and thus at least a portion of the reducing agent so that an unheated volume, of the reducing agent in the inlet tube, which is adjacent to the fluid outlet, is less than about 100 mm. 1. A reductant delivery unit for reducing nitrogen oxide (NOx) emissions from a vehicle , the reductant delivery unit comprising:a solenoid operated fluid injector having a fluid inlet and a fluid outlet, the fluid inlet being constructed and arranged to receive a source of reducing agent and the fluid outlet being constructed and arranged to communicate with an exhaust gas flow path of the vehicle so that the fluid injector controls injection of the reducing agent into the exhaust gas flow path, the fluid injector having an inlet tube for directing the reducing agent between the fluid inlet and the fluid outlet,a coil heater integral with the fluid injector and constructed and arranged, when energized, to inductively heat the inlet tube to thereby heat the reducing agent within the inlet tube,a coil heater housing surrounding a portion of the coil heater,an overmold structure overmolding the coil heater housing, andan injector housing covering at least a portion of the overmold structure and constructed and arranged to be in sealing relation with the overmold structure, absent an O-ring, so that an end of the coil heater is disposed generally adjacent to ...

SYSTEMS, DEVICES, AND METHODS FOR REGENERATING A PARTICULATE FILTER

Embodiments described herein methods can be used in particulate filter regeneration, such as particulate filters used for filtering the exhaust of an engine, e.g., a diesel engine. Systems herein can be configured to dispense combustion gas(es) into housing were a particulate filter is contained and to ignite the combustion gases. Methods for conducting a safety verification process of such systems are disclosed, as well as methods for regenerating the filters. Still other embodiments are described. 125-. (canceled)26. A method for regenerating a particulate filter comprising:coupling one or more supply lines, each defining a conduit, to an engine exhaust pipe through at least one of one or more access ports disposed either upstream or downstream of a particulate filter, wherein each supply line is configured to be releasably coupled to the one or more access ports;dispensing a fuel through the one or more supply lines and into the exhaust pipe; andigniting the fuel thereby regenerating the particulate filter.27. The method of claim 26 , further comprising dispensing a gas mixture comprising oxygen through the one or more supply conduits into the exhaust pipe to mix with the fuel.28. The method of claim 26 , where the ratio of the gas mixture to the fuel is between 20:1 and 10:1 or between 15:1 and 16:1.29. The method claim 26 , where igniting the fuel comprises triggering an electric spark in proximity of the fuel either upstream or downstream of the particulate filter.30. Original) The method of claim 26 , where igniting the fuel comprises raising the temperature of the exhaust gas so that the temperature of the exhaust gas is at least the auto-ignition temperature of the fuel or of a mixture comprising the fuel.31. The method of claim 26 , further comprising measuring for an increase in temperature within the engine exhaust gas to confirm ignition occurred.32. The method of claim 26 , where the fuel comprises at least one of butane claim 26 , propane claim 26 , ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control device for an internal combustion engine which does not require fitting of a feed forward term on an occasion of calculation of a fuel amount to be supplied at a time of temperature raising control is provided. According to the present embodiment, by feed forward control using a steady-state DPF model and a steady-state CCO model, a basic amount (feed forward term) of a fuel amount Qthat is added from a fuel injector in the temperature raising control can be calculated. Namely, the feed forward term can be calculated without depending on a control map. If the feed forward term can be calculated without depending on the control map, fitting of the feed forward term with use of the controlling map is not required. 1. A control device for an internal combustion engine , comprising:a first purifying device that is provided in an exhaust passage of the internal combustion engine and has an oxidation catalyst function;a second purifying device that is provided downstream of the first purifying device, in the exhaust passage;a fuel supply device that supplies fuel to upstream of the first purifying device; anda control device that controls a temperature of the second purifying device to a target temperature by controlling a fuel supply amount from the fuel supply device,wherein the control device comprises a first model that is constructed based on a relation of a heat balance established in the first purifying device, and a second model that is constructed based on a relation of a heat balance established in the second purifying device,the first model and the second model are constructed on a precondition that all of the fuel supplied from the fuel supply device is converted into heat in the first purifying device, and all of the converted heat contributes to raising a temperature of the first purifying device, andthe control device is configured to calculate the temperature of the first purifying device by inputting the target temperature into the second model ...

Exhaust system

An exhaust system for an internal combustion engine, especially in a vehicle, comprising at least one first catalytic converter unit ( 18 ) with at least one catalytic converter device ( 24 ), through which internal combustion engine exhaust gas can flow and a fuel-operated heater ( 36 ). The at least one first catalytic converter unit ( 18 ) comprises a heat exchanger volume ( 50 ) through which heater exhaust gas leaving the heater ( 36 ) can flow.

Exhaust gas purification system

It is an object to make it possible to burn and remove particulate matter without generating runaway even if the particulate matter is excessively accumulated at the time of regeneration of an exhaust gas purification device. A common rail engine and the exhaust gas purification device placed in an exhaust gas path of the engine are provided. A plurality of regeneration controls for burning and removing the particulate matter accumulated in the exhaust gas purification device can be executed. The plurality of regeneration controls include at least non-operation regeneration control for rising exhaust gas temperature by combining post injection (E) and predetermined high speed rotation speed, and recovery regeneration control which can be executed when the non-operation regeneration control fails. In the non-operation regeneration control and the recovery regeneration control, the engine is driven exclusively for burning and removing the particulate matter. The recovery regeneration control is carried out at exhaust gas temperature lower than that of the non-operation regeneration control while taking time longer than that of the non-operation regeneration control.

EXHAUST PURIFICATION SYSTEM AND CATALYST REGENERATION METHOD

Provided is an exhaust purification system including: an NOx occlusion reduction type catalyst that is provided in an exhaust system of an internal combustion engine, and occludes NOx when an exhaust gas is in a lean state, and reduces the NOx when the exhaust gas is in a rich state; a regeneration control unit that executes a regeneration process of bringing the exhaust gas into a rich state to reduce the NOx occluded in the NOx occlusion reduction type catalyst; a storing unit that stores an exhaust lambda prediction value in advance when the regeneration process is executed; a reduction amount estimating unit that estimates an NOx reduction amount when the regeneration process is executed; and a prohibition unit that prohibits the execution of the regeneration process by the regeneration control unit when the estimated NOx reduction amount is less than a predetermined lower limit threshold. 1. An exhaust purification system comprising:an NOx occlusion reduction type catalyst that is provided in an exhaust passage of an internal combustion engine and, when an exhaust gas is in a lean state, occludes NOx contained in the exhaust gas and, when the exhaust gas is in a rich state, reduces and purifies the occluded NOx; anda controller configured to:execute a catalyst regeneration process of bringing the exhaust gas into a rich state to reduce and purify the NOx occluded in the NOx occlusion reduction type catalyst;estimate an NOx reduction amount predicted at the time of executing the catalyst regeneration process before starting the catalyst regeneration process; andprohibit the execution of the catalyst regeneration process when the NOx reduction amount is less than a predetermined lower limit threshold.2. The exhaust purification system according to claim 1 ,wherein the controller is further configured to estimate the NOx reduction amount based on a preset and predetermined fixed value of an excess air ratio of the exhaust gas.3. The exhaust purification system ...

SYSTEMS FOR VEHICLE PARTICULATE FILTER REGENERATION

A system includes one or more processors configured to be operably coupled to a vehicle system configured to travel along a route during a trip. The vehicle system has a vehicle particulate filter (VPF) disposed within an exhaust passage of the vehicle system. The one or more processors are configured to determine, based on trip information about the trip of the vehicle system, one or more regeneration-incompatible (RI) portions of the trip. The RI portions are associated with operating conditions of the vehicle system that are unsuitable for contemporaneous active regeneration of the VPF. The one or more processors are further configured to schedule an active regeneration (AR) event for the vehicle system based on the one or more RI portions of the trip. The AR event occurs during a regeneration portion of the trip. 1. A system comprising:one or more processors configured to be operably coupled to a vehicle system configured to travel along a route during a trip, the vehicle system having a vehicle particulate filter (VPF) disposed within an exhaust passage of the vehicle system, the one or more processors configured to determine, based on trip information about the trip of the vehicle system, one or more regeneration-incompatible (RI) portions of the trip, the RI portions associated with operating conditions of the vehicle system that are unsuitable for contemporaneous active regeneration of the VPF, the one or more processors further configured to schedule an active regeneration (AR) event for the vehicle system based on the one or more RI portions of the trip, the AR event occurring during a regeneration portion of the trip.2. The system of claim 1 , wherein the one or more processors are configured to schedule the AR event such that the regeneration portion of the trip is discrete from the one or more RI portions of the trip.3. The system of claim 1 , wherein claim 1 , during performance of the AR event claim 1 , the one or more processors are configured to ...

Vehicle

A vehicle 100 comprises a fuel tank for storing fuel, a fueling port for supplying the fuel tank with fuel, a CO 2 recovery device configured to recover CO 2 , a CO 2 collection port for collecting CO 2 from the CO 2 recovery device, and a single openable lid configured to cover both the fueling port and the CO 2 collection port.

SYSTEMS AND METHODS FOR CONTROLLING EXHAUST GAS AFTERTREATMENT SENSOR SYSTEMS

An exhaust gas aftertreatment system includes a first sensor configured to measure a parameter and a second sensor disposed proximate the first sensor and configured to measure the parameter. The system includes a controller configured to initially utilize the first sensor as a primary sensor. At target intervals, the controller is configured to receive a first sensor value from the first sensor and receive a second sensor value from the second sensor. The controller is configured to calculate a difference between the first sensor value and the second sensor value and determine if the difference between the first sensor value and the second sensor value is greater than a threshold value. If the difference between the first and second sensor values is greater than the threshold value, the controller is configured to stop utilizing the first sensor as the primary sensor and utilize the second sensor as the primary sensor. 1. An exhaust gas aftertreatment system comprising:a first sensor configured to measure a parameter in the exhaust gas aftertreatment system;a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and initially, utilize the first sensor as a primary sensor for measuring the parameter in the exhaust gas aftertreatment system;', receive a first sensor value from the first sensor,', 'receive a second sensor value from the second sensor,, 'at target intervals, 'calculate a difference between the first sensor value and the second sensor value, and', 'determine if the difference between the first sensor value and the second sensor value is greater than a threshold value; and, 'at least one controller configured toif the difference between the first sensor value and the second sensor value is greater than the threshold value, stop utilizing the first sensor as the primary sensor for measuring the parameter in the exhaust gas aftertreatment system, and begin ...

PROACTIVE CATALYST HEATING

A proactive heating system for a vehicle, which is used to increase the temperature of an exhaust catalyst prior to ignition of an engine to reduce emissions. The proactive heating system is part of an exhaust system for a vehicle, and includes an electrically heated catalyst and an air pump, which are activated prior to engine ignition, to increase the temperature of a three-way catalyst such that the three-way catalyst is at the desired target threshold temperature, or light-off temperature, prior to engine ignition, eliminating the delay in emissions treatment after cold-start of the engine. The proactive heating system addresses the high level of untreated emissions emitted from an internal combustion engine before the catalytic emissions system reaches the light-off temperature. The proactive heating system provides heating of a catalyst to light-off temperature without combusting hydrocarbon fuel, which leads to engine out emissions. 1. A proactive heating system for an exhaust system , comprising:an exhaust manifold connected to an engine;an exhaust treatment device located downstream from the exhaust manifold; andan air transfer device for directing air towards the exhaust treatment device;wherein the air transfer device and the exhaust treatment device are activated such that the temperature of the exhaust treatment device is increased to a predetermined temperature prior to ignition of the engine.2. The proactive heating system for an exhaust system of claim 1 , further comprising:an intake manifold connected to the engine;wherein a portion of the air flowing towards the intake manifold is diverted prior to entering the intake manifold and towards the exhaust treatment device by the air transfer device.3. The proactive heating system for an exhaust system of claim 1 , further comprising:an air pump filter, the air transfer device being in fluid communication with the air pump filter;wherein air from atmosphere is directed by the air transfer device from ...

EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE

In an internal combustion engine, an exhaust purification catalyst (), hydrocarbon feed valve () and particulate filter () are arranged in an exhaust passage. If temperature increasing control should be performed when a first NOpurification method is performed, injection of hydrocarbons for the first NOpurification method is performed with a predetermined period and injection of hydrocarbons for temperature increasing control is performed in a time period when injection of hydrocarbons for the first NOpurification method is not performed, the first NOpurification method being configured to purify NOwhich is contained in the exhaust gas by injecting hydrocarbons from the hydrocarbon feed valve with the predetermined period, the temperature increasing control being configured to increase a temperature of the particulate filter to remove particulate matters trapped on the particulate filter. An amount of injection of hydrocarbons for temperature increasing control when an actual temperature of the particulate filter is low is set larger than that when the actual temperature of the particulate filter is high. 1. An exhaust purification system for an internal combustion engine , in which an exhaust purification catalyst is arranged in an engine exhaust passage and a hydrocarbon feed valve is arranged upstream of the exhaust purification catalyst in the engine exhaust passage , a precious metal catalyst is carried on an exhaust gas flow surface of the exhaust purification catalyst and basic exhaust gas flow surface parts are formed around the precious metal catalyst , wherein the exhaust purification catalyst has the property of reducing NOwhich is contained in exhaust gas if a concentration of hydrocarbons which flow into the exhaust purification catalyst is made to vibrate at an amplitude within a predetermined range of amplitude and with a period within a predetermined range of period and has the property of a storage amount of NOwhich is contained in exhaust gas ...

EXHAUST PURIFICATION SYSTEM, AND CONTROL METHOD FOR EXHAUST PURIFICATION SYSTEM

The embodiments include: a NOx occlusion/reduction catalyst which is provided to an exhaust passage of an internal combustion engine, occludes NOx in exhaust when the exhaust is in a lean state, and reduces and purifies occluded NOx when the exhaust is in a rich state; a NOx purging control unit which, when the exhaust is in the rich state, executes NOx purging in which the NOx occluded in the NOx occlusion/reduction catalyst is reduced and purified; and a NOx-purging-prohibition processing unit which, when at least one of a plurality of prohibition conditions is fulfilled, prohibits execution of catalyst regeneration processing by the NOx purging control unit even if a catalyst-regeneration-processing start request has been issued, and, when one of the prohibition conditions is fulfilled during execution of the catalyst regeneration processing, invalidates the prohibition condition and allows continued execution of the catalyst regeneration processing by the NOx purging control unit. 1. An exhaust purification system comprising:a NOx-occlusion-reduction-type catalyst that is provided in an exhaust system of an internal combustion engine and occludes NOx in exhaust flowing in the exhaust system when the exhaust is in a lean state and reduces and purifies the occluded NOx when the exhaust is in a rich state; anda controller configured to execute:a catalyst regeneration processing executing process for executing catalyst regeneration processing of enriching the exhaust and reducing and purifying the NOx occluded in the NOx-occlusion-reduction-type catalyst;a prohibition process for, when at least one of a plurality of prohibition conditions is fulfilled, prohibiting execution of the catalyst regeneration processing by the catalyst regeneration process even when a catalyst regeneration processing start request is issued, anda continuing process for, when a specific prohibition condition, which is a part of the plurality of prohibition conditions, is fulfilled during ...

EXHAUST PURIFICATION SYSTEM

An exhaust purification system is provided with a NOx-occlusion-reduction-type catalyst and a NOx purge rich control unit that executes NOx purge of reducing and purifying the occluded NOx by putting the exhaust into a rich state by fuel injection control, in a case where a catalyst temperature of the NOx-occlusion-reduction-type catalyst is equal to or higher than a catalyst temperature threshold value and a NOx occlusion amount of the NOx-occlusion-reduction-type catalyst is equal to or higher than an NOx occlusion amount threshold value, and executes the NOx purge even when the NOx occlusion amount is less than the NOx occlusion amount threshold value, in a case where the catalyst temperature is equal to or higher than a catalyst temperature threshold value which is greater than the catalyst temperature threshold value. 1. An exhaust purification system comprising:a NOx-occlusion-reduction-type catalyst that is provided in an exhaust passage of an internal combustion engine and occludes NOx in exhaust when the exhaust is in a lean state and reduces and purifies the occluded NOx when the exhaust is in a rich state;first NOx purge control means for executing NOx purge of reducing and purifying NOx occluded in the NOx-occlusion-reduction-type catalyst by putting the exhaust into the rich state by fuel injection control of at least one of post injection and exhaust pipe injection, in a case where a catalyst temperature of the NOx-occlusion-reduction-type catalyst is equal to or higher than a first catalyst temperature threshold value and a NOx occlusion amount in the NOx-occlusion-reduction-type catalyst is equal to or greater than an occlusion amount threshold value; andsecond NOx purge control means for executing the NOx purge even when the NOx occlusion amount is less than the occlusion amount threshold value, in a case where the catalyst temperature is equal to or higher than a second catalyst temperature threshold value which is greater than the first catalyst ...

INTERNAL COMBUSTION ENGINE CONTROL DEVICE

An internal combustion engine control device including an oxidation catalyst heating value estimation unit A, a NOx catalyst heating value estimation unit B, an oxidation catalyst temperature estimation unit C, a NOx catalyst temperature estimation unit D, and switches that switch between an enabled state in which processing performed by the oxidation catalyst heating value estimation unit A and the oxidation catalyst temperature estimation unit C is executed and a disabled state in which the processing performed by the oxidation catalyst heating value estimation unit A and the oxidation catalyst temperature estimation unit C is not executed, wherein the control device is configured to be applied to both an exhaust gas purification system including an NOx-occlusion-reduction-type catalyst and an oxidation catalyst and an exhaust gas purification system including the NOx-occlusion-reduction-type catalyst and not including the oxidation catalyst. 1. A control device of an internal combustion engine , the control device comprising:catalyst regeneration means for executing catalyst regeneration processing of enriching exhaust gas to reduce and purify NOx occluded in a NOx-occlusion-reduction-type catalyst;first emission amount storing means for acquiring and storing therein in advance at least one of a hydrocarbon amount and a carbon monoxide amount which is emitted from the internal combustion engine during the execution of the catalyst regeneration processing;first heat generation amount estimation means for estimating at least one of a hydrocarbon heat generation amount and a carbon monoxide heat generation amount in the NOx-occlusion-reduction-type catalyst based on the at least one of the hydrocarbon amount and the carbon monoxide amount which is read from the first emission amount storing means during the execution of the catalyst regeneration processing;first catalyst temperature estimation means for estimating a catalyst temperature of the NOx-occlusion- ...

Diesel exhaust fluid injector assembly

A diesel exhaust fluid (DEF) injector assembly is provided for use in an engine exhaust after-treatment system. The DEF injector assembly includes an injector body having a fluid inlet and a fluid outlet that delivers the DEF to an engine exhaust stream. The DEF injector assembly may also include a valve that opens and closes the fluid outlet of the injector body. An exemplary DEF injector assembly further includes an impact structure with an inclined impact surface that disperses and distributes the injected DEF into the engine exhaust stream. Another exemplary DEF injector assembly further includes a shroud that insulates the injector body.

GAS/LIQUID MIXING DEVICE FOR EXHAUST AFTERTREATMENT

A mixing device for an exhaust gas conduit comprises a first, inner sleeve having an upstream end, a downstream end and an inner passage extending therethrough having a diameter “D”. A deflector fin is formed in the first, inner sleeve and extends into the inner passage. A second, outer air-gap shell has an upstream end, a downstream end and a central portion having a diameter “D” that is larger than the diameter D of the first, inner sleeve. The inner sleeve is disposed in the second, outer air-gap shell and the upstream and downstream ends are sealingly fixed to the first, inner sleeve to define an air-gap about the portion of the first, inner sleeve in which the deflector fin is formed. 1. A mixing device for an exhaust gas conduit comprising:a first, inner sleeve having an upstream end, a downstream end and an inner passage extending therethrough having a diameter “D”;a deflector fin formed in the first, inner sleeve and extending into the inner passage;{'b': '1', 'a second, outer air-gap shell having an upstream end, a downstream end and a central portion having a diameter “D” that is larger than the diameter D of the first, inner sleeve, wherein the inner sleeve is disposed in the second, outer air-gap shell and the upstream and downstream ends are sealingly fixed to the first, inner sleeve to thereby define an air-gap about the portion of the first, inner sleeve in which the deflector fin is formed.'}2. The mixing device of claim 1 , further comprising a layer of heat resistant thermal insulation disposed in the air-gap.3. The mixing device of claim 1 , further comprising more than one deflector fin formed in the inner sleeve.4. The mixing device of claim 1 , wherein the deflector fin is punched or cut from the inner sleeve.5. The mixing device of claim 1 , wherein the air-gap is leak-free.6. An exhaust gas system for an internal combustion engine comprising:an exhaust gas conduit configured to transport exhaust gas from the internal combustion an exhaust ...

Low pressure drop swirling flow mixer

An assembly for mixing liquid within a gas flow includes a hollow conduit that is configured for containing a flow of gas and liquid droplets. The assembly includes a hollow conduit having an inner wall and configured for containing a flow of gas and liquid droplets. A first plurality of spaced blades is disposed in the conduit in a first plane. A second plurality of spaced blades are disposed in the conduit in a second plane disposed downstream of the first plane, the second plurality of spaced blades being circumferentially offset from the first plurality of spaced blades. A third plurality of spaced blades are disposed in the conduit in a third plane disposed downstream of the second plane, the third plurality of spaced blades being circumferentially offset from the second plurality of spaced blades.

Work vehicle

A work vehicle including a DPF system configured to collect particulate matter contained in exhaust gas from an engine; an SCR system configured to add, to the exhaust gas from the engine, a reductant stored in a reductant storage tank to reduce nitrogen oxide contained in the exhaust gas; and a control unit capable of executing a DPF renewal control whereby particulate matter collected and deposited in the DPF system is burned and removed by using the exhaust gas from the engine and an SCR reference operation restricting control to restrict an operating condition of the engine. The SCR reference operation restricting control is executed when an amount of the reductant stored in the reductant storage tank is a preset amount or less, or when an abnormality occurs in the SCR system. The control unit preferentially executes the DPF renewal control over the SCR reference operation restricting control.

Engine system for emissions compliance

An engine system is disclosed. The engine system may have an engine having an accessory end and a drive end opposite the accessory end. The engine system may also have a turbocharger arrangement located adjacent the accessory end. The turbocharger arrangement may be configured to receive exhaust from the engine and to deliver compressed air to the air cooling arrangement. Further, the engine system may have an air cooling arrangement located adjacent the accessory end and configured to deliver fresh air to the engine. In addition, the engine system may have a mixing duct extending from the accessory end to the drive end and configured to receive the exhaust from the turbocharger arrangement. The engine system may also have an after-treatment system located adjacent the drive end. The after-treatment system may be configured to receive the exhaust from the mixing duct and to discharge the exhaust to an ambient.

Exhaust Gas Purification System of Internal Combustion Engine

In an exhaust gas purification system having an oxidation catalyst and an exhaust gas purifying unit formed so as to include a filter and a selective reduction-type NOx catalyst, at least one of supply of the fuel component and supply of ammonia or an ammonia precursor in an amount that is increased when a prescribed condition under which a part of a fuel component supplied to exhaust gas passes through to a downstream side of the oxidation catalyst is satisfied as compared to a non-passing time supply amount that is a supply amount of ammonia or the ammonia precursor to be supplied when the prescribed condition is not satisfied is controlled such that ammonia for NOx selective reduction by the increased ammonia or ammonia precursor reaches the exhaust gas purifying unit before the passed fuel component. Accordingly, an effect of a fuel component supplied to exhaust gas on a NOx purification performance of the selective reduction-type NOx catalyst is minimized in the exhaust gas purification system of the internal combustion engine which includes the filter and the selective reduction-type NOx catalyst.

Exhaust gas control system for internal combustion engine

When the temperature of an NSR catalyst belongs to a specified NSR temperature range and the temperature of an SCR catalyst belongs to a specified SCR temperature range, urea water is added, and specified air-fuel ratio processing relating to an air-fuel ratio of exhaust gas flowing into the NSR catalyst is executed. The specified air-fuel ratio processing includes i) a first air-fuel ratio processing to cause the air-fuel ratio of the exhaust gas flowing into the NSR catalyst to be a first lean air-fuel ratio that causes emission of occluded NOx from the NSR catalyst and ii) a second air-fuel ratio processing to cause the air-fuel ratio of the exhaust gas to be a second lean air-fuel ratio leaner than the first lean air-fuel ratio. In the specified air-fuel ratio processing, the first air-fuel ratio processing and the second air-fuel ratio processing are alternately repeated.

Exhaust system comprising a passive nox adsorber

An exhaust system for treating an exhaust gas produced by a lean burn engine comprising: (i) a NO x absorber catalyst comprising a molecular sieve catalyst disposed on a substrate, wherein the molecular sieve catalyst comprises a noble metal and a molecular sieve, wherein the molecular sieve contains the noble metal; (ii) means for introducing hydrocarbons into the exhaust gas; and (iii) a lean NO x trap; wherein the NO x absorber catalyst is upstream of both the means for introducing hydrocarbons into the exhaust gas and the lean NO x trap.

Methods and systems for removing deposits in an aftertreatment system to minimize visible smoke emissions

Systems and methods for removing accumulated soot in an aftertreatment system for an engine are disclosed herein. A method includes receiving an indication that an engine of a vehicle has been operating in a low load condition for more than a predefined amount of time; in response, determining an adsorption rate of soot in an exhaust aftertreatment system of the vehicle; determining an adsorption amount of soot based on the adsorption rate for a predefined amount of time; comparing the adsorption amount to a predefine adsorption amount limit; and in response to the adsorption amount exceeding the predefined adsorption amount limit, initiating an exhaust cleaning event to remove at least some of the accumulated soot in the exhaust aftertreatment system.

EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

In an internal combustion engine, an exhaust purification catalyst and a hydrocarbon feed valve are arranged in an exhaust passage. When a temperature of the exhaust purification catalyst falls in a first catalyst temperature region (I), a first NOpurification method is performed, while when a temperature of the exhaust purification catalyst falls in a second catalyst temperature region (II), a second NOpurification method is performed. When the temperature of the exhaust purification catalyst falls in a region (IIP) in the second catalyst temperature region close to the first catalyst temperature region, the temperature of the exhaust purification catalyst is made to increase to shift the region in which the temperature of the exhaust purification catalyst falls to the first catalyst temperature region to thereby switch the NOpurification method used from the second NOpurification method to the first NOpurification method. 1. An exhaust purification system for an internal combustion engine , in which an exhaust purification catalyst is arranged in an engine exhaust passage and a hydrocarbon feed valve is arranged upstream of the exhaust purification catalyst in the engine exhaust passage , wherein a precious metal catalyst is carried on an exhaust gas flow surface of the exhaust purification catalyst and basic exhaust gas flow surface parts are formed around the precious metal catalyst , wherein the exhaust purification catalyst has the property of reducing the NOcontained in exhaust gas if a concentration of hydrocarbons flowing into the exhaust purification catalyst is made to vibrate at an amplitude within a predetermined range of amplitude and with a period within a predetermined range of period and has the property of a storage amount of NOcontained in exhaust gas increasing if a vibration period of the hydrocarbon concentration is made longer than the predetermined range of period , and wherein a first NOpurification method configured to inject hydrocarbons ...

Temperature estimation module, control apparatus for internal combustion engine, and method for operating temperature estimation module

A temperature estimation module applied to a control apparatus for an internal combustion engine is configured to execute a virtual temperature estimation process that estimates a virtual temperature, which is a temperature of an exhaust purifying device under an assumption that a dither control process is not executed, based on an operation point of the internal combustion engine during execution of the dither control process. The temperature estimation module is further configured to execute an actual temperature estimation process that estimates an actual temperature of the exhaust purifying device based on a difference between the air-fuel ratio of a rich combustion cylinder and the air-fuel ratio of a lean combustion cylinder and based on the operation point of the internal combustion engine during execution of the dither control process.

METHOD FOR PRODUCING METAL EXCHANGED METALLO-ALUMINOPHOSPHATES BY SOLID-STATE ION EXCHANGE AT LOW TEMPERATURES

Method for the preparation of a metal exchanged crystalline microporous metalloaluminophosphate or mixtures containing metal exchanged microporous metalloaluminophosphates materials comprising the steps of providing a dry mixture containing a) one or more metalloaluminophosphates starting materials that exhibit ion exchange capacity, and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia to a temperature and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the crystalline microporous material; and obtaining the metal-exchanged microporous metalloaluminophosphate material or mixtures containing the metal-exchanged microporous metalloaluminophosphate material. 1. Method for the preparation of a metal exchanged crystalline microporous metalloaluminophosphate or mixtures containing metal exchanged microporous metalloaluminophosphates materials comprising the steps ofproviding a dry mixture containinga) one or more metalloaluminophosphates starting materials that exhibit ion exchange capacity andb) one or more metal compounds;heating the mixture in a gaseous atmosphere containing ammonia to a temperature and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the crystalline microporous material;and obtaining the metal-exchanged microporous metalloaluminophosphate material or mixtures containing the metal-exchanged microporous metalloaluminophosphate material.2. Method according to claim 1 , wherein the one or more metalloaluminophosphate starting materials contain one or more metals chosen from the group silicon claim 1 , titanium claim 1 , tin claim 1 , zinc claim 1 , magnesium claim 1 , manganese claim 1 , cobalt or iron.3. Method according to claim 1 , where the one or more metalloaluminophosphate starting materials have the framework code of CHA claim 1 , AEI claim 1 , AFI claim 1 , AEL claim 1 , ...

FLUID DELIVERY SYSTEM WITH LINE PRESSURE CONTROL VALVE

An exhaust treatment fluid delivery system () may include a supply passageway (), a supply manifold (), injectors (), a bypass passageway () and first and second pressure sensors (). The supply passageway () receives the exhaust treatment fluid from a tank () and provides the exhaust treatment fluid to the supply manifold (). The bypass passageway () connects the supply passageway () with the return passageway () and includes a bypass valve () controlling fluid flow therebetween. The first pressure sensor () measures a first pressure of exhaust treatment fluid in the supply passageway () based upon which the bypass valve () is controlled. The second pressure sensor () measures a second pressure of exhaust treatment fluid in the supply manifold () based upon which the injectors () are controlled. 147-. (canceled)48. An exhaust aftertreatment system for treating exhaust gas discharged from a combustion engine , the exhaust aftertreatment system comprising:a catalyst component; and a tank for holding the exhaust treatment fluid;', 'a supply passageway receiving the exhaust treatment fluid from the tank and providing the exhaust treatment fluid to a supply manifold;', 'a plurality of injectors that receive the exhaust treatment fluid from the supply manifold and dose the exhaust treatment fluid into the exhaust stream;', 'a bypass valve selectively allowing a portion of the exhaust treatment fluid in the supply passageway to return to the tank via a bypass passageway without flowing through the injectors; and', 'a control module controlling the bypass valve and the injectors based on a first fluid pressure in the supply passageway and a second fluid pressure between the supply manifold and the injectors., 'an exhaust treatment fluid delivery system for injecting an exhaust treatment fluid into an exhaust stream at a location upstream of the catalyst component, the exhaust treatment fluid delivery system including49. The exhaust aftertreatment system of claim 48 , ...

Systems and methods for controlling exhaust gas aftertreatment sensor systems

An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to alternately receive sensor values from the first sensor for a first target period of time, and receive sensor values from the second sensor for a second target period of time.

SYSTEMS AND METHODS FOR CONTROLLING EXHAUST GAS AFTERTREATMENT SENSOR SYSTEMS

An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to simultaneously receive sensor values from the first sensor and receive sensor values from the second sensor. 1. An exhaust gas aftertreatment system comprising:a first sensor configured to measure a parameter in the exhaust gas aftertreatment system;a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; andat least one controller configured to simultaneously receive sensor values from the first sensor and receive sensor values from the second sensor.2. The exhaust gas aftertreatment system of claim 1 , wherein: determine a difference between a first sensor value received from the first sensor and a second sensor value received from the second sensor, and', determine a difference between the first sensor value and a calculated sensor value based on at least one aftertreatment operating condition and/or at least one engine operating condition,', 'determine a difference between the second sensor value and the calculated sensor value based on the at least one aftertreatment operating condition and/or the at least one engine operating condition,', 'if the difference between the first sensor value and the calculated sensor value is greater than or equal to a second threshold value, deactivate the first sensor and receive sensor values only from the second sensor, and', 'if the difference between the second sensor value and the calculated sensor value is greater than or equal to the second threshold value, deactivate the second sensor and receive sensor values only from the first sensor., 'if the difference between the first sensor value and the second ...

AFTERTREATMENT SYSTEM INCLUDING PREHEATING OXIDATION CATALYST

An aftertreatment system for treating an exhaust gas comprises an exhaust conduit, a preheating oxidation catalyst, a primary oxidation catalyst disposed downstream of the preheating oxidation catalyst, and a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst. A controller is configured to determine a temperature of an exhaust gas at an inlet of the selective catalytic reduction system. In response to the temperature being below a threshold temperature, the controller generates a hydrocarbon insertion signal configured to cause hydrocarbons to be inserted into or upstream of the preheating oxidation catalyst so as to increase a temperature of the exhaust gas to above the threshold temperature. 1. An aftertreatment system for treating exhaust gas produced by an engine , the aftertreatment system comprising:an exhaust conduit configured to receive the exhaust gas;a preheating oxidation catalyst;a primary oxidation catalyst disposed downstream of the preheating oxidation catalyst;a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst; and determine a temperature of the exhaust gas at an inlet of the selective catalytic reduction system, and', 'in response to the temperature of the exhaust gas at the inlet of the selective catalytic reduction system being below a threshold temperature, generate a hydrocarbon insertion command configured to cause hydrocarbons to be inserted into the preheating oxidation catalyst or into the exhaust gas upstream of the preheating oxidation catalyst,, 'a controller configured towherein the preheating oxidation catalyst is configured to catalyze combustion of the inserted hydrocarbons so as to increase the temperature of the exhaust gas to above the threshold temperature.2. The aftertreatment system of claim 1 , wherein the controller is configured to cause the hydrocarbons to be inserted in response to the temperature ...

Method, system, and apparatus for diagnosing an exhaust aftertreatment component

According to one embodiment, an apparatus is disclosed for diagnosing a condition of a component of an exhaust aftertreatment system in exhaust receiving communication with an internal combustion engine where the exhaust aftertreatment system includes a selective catalytic reduction (SCR) catalyst. The diagnostic module is configured to determine a normalized tailpipe nitrogen-oxide NO x value based on a tailpipe NO x sensor signal and a ratio of an SCR inlet ammonia (NH 3 ) flow rate to an SCR inlet NO x flow rate. The apparatus also includes a component condition module configured to determine a condition of the component based on the normalized tailpipe NO x value.

Emissions control in diesel engines

An exhaust system is configured with a diesel oxidation catalyst that receives first exhaust gases from a diesel engine, a diesel particulate filter that receives second exhaust gases from the diesel oxidation catalyst. A first sensor in the exhaust system determines first exhaust gases data and transmits the first exhaust gases data to a controller while a second sensor determines second exhaust gases data and transmits the second exhaust gases data to the controller. The controller estimates unmeasured exhaust gases data based on the first exhaust gases data and the second exhaust gases data and determines when to initiate a regeneration cycle for the diesel particulate filter.

System comprising vehicular compression ignition engine and an emissions control device comprising an electrically heatable element

A system ( 2 ) comprising (i) a vehicular compression ignition engine ( 1 ) comprising one or more engine cylinders and one or more electronically-controlled fuel injectors therefor; (ii) an exhaust line ( 3 ) for the engine comprising: a first emissions control device ( 5 ) comprising a first honeycomb substrate, which comprises a hydrocarbon adsorbent component; and a second emissions control device ( 7 ) comprising an electrically heatable element ( 7 a ) and a catalysed second honeycomb substrate ( 7 b ), which comprises a rhodium-free platinum group metal (PGM) comprising platinum, wherein the electrically heatable element ( 7 a ) is disposed upstream from the catalysed second honeycomb substrate ( 7 b ) and wherein both the electrically heatable element ( 7 a ) and the catalysed second honeycomb substrate ( 7 b ) are disposed downstream from the first honeycomb substrate; a third emissions control device ( 22 ), which is a third honeycomb substrate comprising an ammonia-selective catalytic reduction catalyst disposed downstream from the second emissions control device ( 7 ); and one or more temperature sensors located: upstream of the electrically heatable element and/or upstream of the first honeycomb substrate; and between the electrically heatable element ( 7 a ) and the catalysed second honeycomb substrate ( 7 b ); and (iii) an engine control unit ( 20 ) comprising a central processing unit pre-programmed, when in use, to control both a heating activation state of the electrically heatable element ( 7 a ); an injection timing strategy of the one or more electronically-controlled fuel injector to increase the temperature of at least the first emissions control device following key-on/cold-starting a vehicle comprising the system, wherein the one or more temperature sensors are electrically connected to the engine control unit for feedback control in the system.

ENGINE SYSTEM AND CONTROL APPARATUS AND CONTROL METHOD FOR ENGINE SYSTEM

An engine system includes a turbocharger (), an exhaust gas control apparatus (), a fuel addition device (), a heating unit, and an ECU. The turbocharger includes a variable nozzle mechanism (). The exhaust gas control apparatus is disposed on an exhaust downstream side of the exhaust turbine in an exhaust passage. The fuel addition device is configured to add a fuel to the exhaust gas of the engine to recover the function of the exhaust gas control apparatus on a further exhaust upstream side than the exhaust turbine. The heating unit is configured to heat the link chamber (). The ECU is configured to execute heating control for controlling the initiation and the stopping of heating by the heating unit and execute the heating control in a period overlapping with at least part of a period when the addition of the fuel by the fuel addition device is executed. 1. An engine system comprising:a turbocharger including a variable nozzle mechanism, the variable nozzle mechanism including a plurality of nozzle vanes, a link chamber and a link mechanism, the plurality of nozzle vanes being disposed in an exhaust flow path of an exhaust turbine, the link chamber being adjacent to the exhaust flow path, and the link mechanism being disposed in the link chamber, and being configured to connect the plurality of nozzle vanes;an exhaust gas control apparatus disposed on an exhaust downstream side of the exhaust turbine in an exhaust passage of an internal combustion engine, and the exhaust gas control apparatus being configured to purify exhaust gas;a fuel addition device disposed on an exhaust upstream side of the exhaust turbine, and the fuel addition device being configured to add fuel to the exhaust gas of the internal combustion engine to recover a function of the exhaust gas control apparatus;a heating unit configured to heat the link chamber; andan electronic control unit configured to execute a heating control, in the heating control, the electronic control unit being ...

Nitrogen oxide purification system and control method of the same

A nitrogen oxide purification system includes an exhaust line exhausting exhaust gas from a combustion chamber. A first nitrogen oxide purification device is mounted at an upstream side of the exhaust line to primarily purify nitrogen oxides (NOx) included in the exhaust gas, and a second nitrogen oxide purification device is mounted to a downstream side of the first nitrogen oxide purification device to secondarily purify the NOx. A second injector is disposed between the first nitrogen oxide purification device and the first injector to additionally inject fuel for controlling an air/fuel ratio of the exhaust gas.

Automatic draining of water-fuel separator via downstream injection system

A diesel engine system includes an engine, an exhaust system connected to the engine, and a water-fuel separator. The exhaust system has an aftertreatment device, an exhaust pipe upstream of the aftertreatment device, and a fuel injector connected to the exhaust pipe. The water-fuel separator has a filter configured to separate water from fuel and a reservoir configured to store the separated water. The reservoir is in fluid communication with the fuel injector.

Methods and systems for aftertreatment device

Methods and systems are provided for an exhaust system. In one example, a method includes heating an aftertreatment device during an engine off. The heating includes utilizing one or more of an injector, a heater, and a recirculation fan.

SYSTEMS, DEVICES, AND METHODS FOR REGENERATING A PARTICULATE FILTER

Embodiments described herein methods can be used in particulate filter regeneration, such as particulate filters used for filtering the exhaust of an engine, e.g., a diesel engine. Systems herein can be configured to dispense combustion gas(es) into housing were a particulate filter is contained and to ignite the combustion gases. Methods for conducting a safety verification process of such systems are disclosed, as well as methods for regenerating the filters. Still other embodiments are described. 142.-. (canceled)43. An exhaust pipe fitting comprisinga sidewall having a first end and a second end and defining a conduit extending between the first end and the second end, where the sidewall comprises an opening disposed between the first end and the second end that is in fluid communication with the conduit;a lock coupled to the sidewall and configured to releasably couple to one or more fluid supply lines when the supply lines are extending through the opening;the first end and the second end each configured to couple to an exhaust pipe or to a particulate filter housing such that the sidewall defines a portion of an engine exhaust path either upstream or downstream of the particulate filter housing.44. The fitting of claim 43 , where one of the first end and the second end is coupled to a mounting component configured to couple to a particulate filter housing.45. The fitting of claim 43 , further comprising a cover coupled to the sidewall claim 43 , moveable between an open position and a closed position claim 43 , and configured to cover the opening when in the closed position claim 43 ,46. The fitting of claim 43 , further comprising a clamp claim 43 , where the sidewall is a portion of the clamp.47. A method of testing a particulate filter regeneration system comprising:opening a first valve downstream of a first fuel reservoir, a fuel pressure regulator, a second valve, and a pressure sensor disposed between the first valve and the second valve, where the ...

EXHAUST GAS CLEANING SYSTEM FOR INTERNAL COMBUSTION ENGINE AND EXHAUST GAS CLEANING METHOD FOR INTERNAL COMBUSTION ENGINE

An exhaust gas cleaning system for an internal combustion engine is provided with, in an exhaust passage of an internal combustion engine and in order from an upstream side: a hydrocarbon supply unit; an upstream side catalyst unit of an oxidation catalyst, a NOx reduction catalyst, or the like; and a catalyst-equipped fine particle collection filter having a hydrocarbon adsorption function, wherein when a vehicle on which the engine is mounted accelerates after driving for a preset set time period at a temperature of exhaust gas equal to or less than a preset set exhaust gas temperature, the supply of hydrocarbon into the exhaust gas is started when an exhaust gas temperature becomes equal to or more than a preset first set temperature, and the supply of hydrocarbon is terminated when a preset termination condition is satisfied. 1. An exhaust gas cleaning system for an internal combustion engine comprising:an upstream-side catalyst unit loaded with an oxidizing catalyst or a NOx reducing catalyst, the upstream-side catalyst unit being disposed in an exhaust passageway of the internal combustion engine;a catalyst loaded particulate trapping filter disposed downstream of the upstream-side catalyst unit in the exhaust passageway;a hydrocarbon supply unit that supplies hydrocarbons to exhaust gases flowing into the upstream-side catalyst unit; anda control unit that controls the hydrocarbon supply unit,wherein the catalyst loaded particulate trapping filter is provided with a hydrocarbon adsorption function to adsorb hydrocarbons when the temperature of the catalyst loaded particulate trapping filter is lower than a hydrocarbon releasing temperature and to release the adsorbed hydrocarbons when the temperature of the catalyst loaded particulate filter is equal to or higher than the hydrocarbon releasing temperature, andwherein, when a vehicle equipped with the internal combustion engine is accelerated after the vehicle has continued to be driven for a preset period of ...

Apparatus, Method, and System for Diagnosing Reductant Deposits in an Exhaust Aftertreatment System

An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system that delivers reductant to an exhaust stream in an exhaust aftertreatment system. A temperature sensor may be positioned in or near the flow of reductant and exhaust to measure the temperature of the reductant and exhaust. A change in temperature over time, such as an increase, decrease, or change in variation amplitude, may indicate the presence of a reductant deposit in the system. Detection of the deposit may initiate a regeneration cycle in which the operating characteristics of the system change to eliminate the reductant deposit to prevent it from hindering the performance of the exhaust aftertreatment system.

METHOD OF MEASURING AN EXHAUST GAS TEMPERATURE

A method of measuring exhaust gas temperatures in an exhaust pipe of an internal combustion engine is disclosed. A value of a mass flow rate of exhaust gasses flowing into the exhaust pipe is determined. A signal yielded by a temperature sensor located in a first point of the exhaust pipe is sampled and applied as input to a first computational module that yields a corresponding first output signal. A value of the temperature of the exhaust gasses flowing in the first point of the exhaust pipe is calculated on the basis of a value of the first output signal. 1. A method of measuring exhaust gas temperatures in an exhaust pipe of an internal combustion engine comprising:determining a value of a mass flow rate of exhaust gasses flowing into the exhaust pipe;sampling a signal yielded by a temperature sensor located in a first point of the exhaust pipe; {'br': None, 'i': F', 's', '·s', 'F', 's, 'sub': 'RT', '*()=(1+τ)·()'}, 'applying the signal as input to a first computational module that yields a corresponding first output signal, wherein the first computational module has the following transfer functioncalculating a value of the temperature of the exhaust gasses flowing in the first point of the exhaust pipe on the basis of the first output signal; and{'sub': 'RT', 'wherein F(s) is the signal yielded by the temperature sensor, F*(s) is the first output signal and τis a coefficient determined as a function of the measured value of the mass flow rate of exhaust gasses.'}2. The method according to claim 1 , wherein the first computational module implements the following equation:{'br': None, 'i': f', 't', 'f', 't', '·f', 't, 'sub': 'RT', '*()=()+τ′()'}wherein f(t) is a value of the signal sampled at a time t, f*(t) is a value of the first output signal at the time t, and f′(t) is a value of a derivative of the signal at the time t.3. The method according to claim 2 , further comprising calculating the value f′(t) of the derivative of the signal with a finite difference ...

PRO-ACTIVE THERMAL MEASURE TO RECOVER AND OR RETAIN deNOx PERFORMANCE

A short cyclic thermal treatment process in an engine aftertreatment system of a diesel engine in a vehicle, which may be able to recover and/or retain NOx conversion performance of an engine aftertreatment system by keeping the system clean from unintended pollution like accumulated urea deposits. The thermal treatment process is controlled by a process controller, arranged to carry out a long cyclic cleaning process at a first time interval, at a first exhaust gas temperature higher than the operational temperature in regeneration mode; combined with a short cyclic thermal treatment process at a second time interval, at a second exhaust gas temperature higher than the operational temperature in non-regeneration mode; wherein the second elevated exhaust gas temperature is lower than the first temperature. 1. A thermal treatment process in an after treatment system of a diesel engine of a vehicle controlled by a process controller , arranged to carry outa long cyclic thermal treatment process at a first time interval, at a first exhaust gas temperature higher than the operational temperature; characterized bya plurality of thermal measures carried out by fuel dosing in a short cyclic thermal treatment process carried out at a calculated second time interval within the first time interval, carried out at a second exhaust gas temperature where urea deposits in the after treatment system can be thermally decomposed;wherein the second exhaust gas temperature is lower than the first temperature.2. The thermal treatment process according to claim 1 , wherein the short cyclic thermal treatment process is started after a non-cyclic recovery regeneration claim 1 , that is initiated by a performance indicator level.3. The thermal treatment process according to claim 1 , wherein the short cyclic thermal treatment process ends prior to first time interval with a pause duration larger than the second time interval.4. The thermal treatment process according to claim 1 , wherein ...

CATALYST FOR PURIFYING COMBUSTION EXHAUST GAS, AND METHOD FOR PURIFYING COMBUSTION EXHAUST GAS

The present invention provides a catalyst for purifying a combustion exhaust gas and a method for purifying a combustion exhaust gas, capable of efficiently removing a nitrogen oxide in an exhaust gas in a relatively low temperature range discharged from an internal combustion engine, such as a marine diesel engine, with a smaller amount of the reducing agent than the ordinary techniques. The catalyst for purifying a combustion exhaust gas is a catalyst used in a purification method of a combustion exhaust gas of removing a nitrogen oxide in a combustion exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol added thereto as a reducing agent, the catalyst containing a catalyst support containing zeolite, having supported thereon at least one metal selected from the group consisting of Ag (silver), Bi (bismuth), and Pb (lead). 1. A catalyst for purifying a combustion exhaust gas , which is used in a purification method of a combustion exhaust gas of removing a nitrogen oxide in a combustion exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol added thereto as a reducing agent , the catalyst containing a catalyst support containing zeolite , having supported thereon at least one metal selected from the group consisting of Ag , Bi , and Pb.2. The catalyst for purifying a combustion exhaust gas according to claim 1 , wherein the zeolite is MFI zeolite or FER zeolite.35-. (canceled)6. A method for purifying a combustion exhaust gas containing making a combustion exhaust gas having an alcohol added thereto as a reducing agent claim 1 , into contact with a denitration catalyst containing a catalyst support containing zeolite claim 1 , having supported thereon at least one metal selected from the group consisting of Ag claim 1 , Bi claim 1 , and Pb claim 1 , at a temperature of from 180 to 400° C. claim 1 , so as to remove a nitrogen oxide in the exhaust gas.7. The method for purifying a ...

Methods and systems for removing deposits in an aftertreatment system

Systems and methods for removing deposit in an aftertreatment system for an engine are disclosed herein. The method comprises determining an amount of deposits accumulated in the aftertreatment system, determining combustion targets for the engine in response to determining the amount of deposits exceeds a deposit threshold, and modulating an air mass flow for the engine based on the determined combustion targets. The air mass flow can be modulated by changing the position of the wastegate or the geometry of the variable geometry turbine (VGT).

System and Method for Exhaust Gas After Treatment

A hydrocarbon selective catalytic reduction (HC-SCR) catalyst is regenerated using a nitrogen-based reductant agent. The HC-SCR catalyst is in communication with a power system such as an internal combustion engine and receives exhaust gasses from the internal combustion engine. Sulfur in the exhaust gasses may deactivate the HC-SCR catalyst by sulfur oxides forming thereon. To remove the sulfur oxides, a nitrogen-based reductant agent is introduced to the exhaust gasses. The nitrogen-based reductant agent decomposes to nitrogen oxides and hydrogen. The hydrogen reacts with the sulfur oxides to form hydrogen sulfides thereby removing the sulfur oxides from the HC-SCR catalyst.

Apparatus, Method, and System for Diagnosing Reductant Delivery Performance

An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system with a controller that performs period diagnostics to determine whether there is a blockage in the reductant delivery system. The diagnostic procedure may include sampling first and second pressures at first and second operating conditions, respectively, and then comparing the first pressure differential between the first and second pressures with one or more threshold pressure differentials to determine whether system components such as a dosing line and an injector are at least partially blocked. If such a test is not conclusive, it may be repeated at a third and fourth operating conditions to provide a second pressure differential. The offset between the first and second pressure differentials may also be used to help diagnose where a blockage in the system resides.

EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE

An internal combustion engine in which a hydrocarbon feed valve, exhaust purification catalyst, and NOselective reduction catalyst are arranged in an engine exhaust passage. A first NOremoval method which injects hydrocarbons from the hydrocarbon feed valve within a predetermined range of period and uses the reducing intermediate which is generated due to this so as to reduce the NOcontained in the exhaust gas and a second NOremoval method which makes the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst rich with a period longer than this predetermined range are used. When the first NOremoval method should be used and the amount of adsorbed ammonia at the NOselective reduction catalyst is large, use of the first NOremoval method is stopped. 1. A method of purifying exhaust gas exhausted from an internal combustion engine comprising an exhaust purification catalyst arranged in an engine exhaust passage , an NOselective reduction catalyst arranged downstream of the exhaust purification catalyst in the engine exhaust passage , and a hydrocarbon feed valve arranged upstream of the exhaust purification catalyst in the engine exhaust passage , a precious metal catalyst is carried on an exhaust gas flow surface of the exhaust purification catalyst , a basicity layer is formed on the exhaust gas flow surface around the precious metal catalyst , a first NOremoval method for reducing NOcontained in an exhaust gas by a reducing intermediate which is held on the basicity layer and generated by injecting hydrocarbons from the hydrocarbon feed valve within a predetermined range of period and a second NOremoval method in which an air-fuel ratio of an exhaust gas flowing into the exhaust purification catalyst is made rich by a period which is longer than said predetermined range to release and reduce NOwhich is stored in the exhaust purification catalyst when the air-fuel ratio of the exhaust gas is lean are used , wherein{'sub': x', 'x', 'x, 'the ...

Increased NOx Conversion by Ozone Introduction

Exhaust purification system and methods for the reduction of emissions from an exhaust stream, including an upstream catalyst coupled with a passive NOadsorber catalyst; means to contact the exhaust stream with ozone, to react NO in the exhaust stream with the ozone to produce NO; and an SCR catalyst. 1. An exhaust purification system for the reduction of emissions from an exhaust stream , comprising , in order:{'sub': 'x', 'a. an upstream catalyst coupled with a passive NOadsorber catalyst;'}{'sub': '2', 'b. means to contact the exhaust stream with ozone, to react NO in the exhaust stream with the ozone to produce NO;'}c. an SCR catalyst.2. The system of claim 1 , wherein the upstream catalyst comprises an oxidation catalyst and/or a cold start catalyst.3. The system of claim 1 , wherein the passive NOadsorber catalyst comprises a filter substrate.4. The system of claim 1 , wherein the upstream catalyst and the passive NOx adsorber catalyst are included on a single substrate.5. The system of claim 1 , further comprising a means for heating the exhaust gas upstream of the means to contact the exhaust stream with ozone.6. The system of claim 1 , further comprising an SCRF catalyst located upstream of the SCR catalyst.7. The system of any claim 1 , further comprising an ASC downstream of the SCR catalyst.8. A method of reducing emissions from an exhaust stream claim 1 , comprising:a. contacting the exhaust stream with an upstream catalyst coupled with a passive NOx adsorber catalyst;{'sub': '2', 'b. oxidizing NO to NOby contacting the exhaust stream with ozone;'}{'sub': 2', '2, 'c. selectively catalytically reducing NOto nitrogen by contacting the NOproduced from the oxidizing step with a reductant in the presence of an SCR catalyst.'}9. The method of claim 8 , wherein the upstream catalyst comprises an oxidation catalyst and/or a cold start catalyst.10. The method of claim 8 , wherein the passive NOadsorber catalyst comprises a filter substrate.11. The method of ...

Diesel dosing unit having an anti-coking injector assembly, and methods of constructing and utilizing same

A diesel dosing unit (DDU) is disclosed, having a fluid injector assembly. The fluid injector assembly includes a fluid injector and an attachment assembly attached to a downstream end of the fluid injector, the attachment assembly at least partly defining a fluid path in fluid communication with a fluid path of the fluid injector. The DDU further includes a DDU housing in which the injector assembly is disposed, the DDU housing being configured to directly attach to an exhaust pipe of a vehicle. The fluid injector assembly is dimensioned to largely match the dimensions of an existing injector of a reductant delivery unit (RDU) such that the DDU housing utilizes the housing of the existing RDU.

EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE

In an internal combustion engine, a hydrocarbon feed valve () and an exhaust purification catalyst () are arranged in an engine exhaust passage. When releasing the stored NOfrom the exhaust purification catalyst (), usually combustion gas of a rich air-fuel ratio is generated in the combustion chamber () to make the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst () rich. When releasing the stored NOfrom the exhaust purification catalyst () in case where the temperature of the exhaust purification catalyst () is low, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst () is made rich by injecting hydrocarbons from the hydrocarbon feed valve (). 1. An exhaust purification system of an internal combustion engine comprising an exhaust purification catalyst arranged in an engine exhaust passage and a hydrocarbon feed valve arranged in the engine exhaust passage upstream of the exhaust purification catalyst , a precious metal catalyst being carried on an exhaust gas flow surface of the exhaust purification catalyst , a basic layer being formed around the precious metal catalyst , and an air-fuel ratio of an exhaust gas flowing into the exhaust purification catalyst being made rich when releasing NOwhich is stored in the basic layer from the exhaust purification catalyst , wherein{'sub': 'x', 'when releasing the stored NOX from the exhaust purification catalyst, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by generating combustion gas of a rich air-fuel ratio in a combustion chamber or the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by injecting hydrocarbons from the hydrocarbon feed valve into the engine exhaust passage, and, in case where hydrocarbons are injected from the hydrocarbon feed valve into the engine exhaust passage to release the stored NOfrom the exhaust purification catalyst, an amount of ...

Exhaust after-treatment system for an internal combustion engine

An exhaust after-treatment system for an internal combustion engine is provided having an exhaust passage in fluid communication with the exhaust manifold of the engine. A turbocharger coupled to the exhaust passage is operatively driven by a first portion of exhaust gases exiting the exhaust manifold. A bypass line is disposed parallel to the turbocharger, and fluidly coupled to the exhaust passage upstream and downstream of the turbocharger. The bypass line receives a second portion of the exhaust gases exiting the exhaust manifold. A fuel injector disposed in the bypass line injects a pre-determined amount of fuel in the bypass line to the second portion of the exhaust gases. An exhaust after-treatment module located downstream of the turbocharger and the bypass line receives the mixture of the first portion and the second portion of the exhaust gas.

Exhaust apparatus for diesel engine

An exhaust apparatus for a diesel engine rapidly burns an unburned deposit in an upstream exhaust catalyst with heat of a heater. The exhaust apparatus includes a downstream exhaust cleaner, an upstream exhaust catalyst provided in an exhaust passage, upstream of the downstream exhaust cleaner, a heater disposed at an exhaust inlet of the upstream exhaust catalyst, and an engine starter apparatus. A control unit controls the power supply to the heater and an engine start process is performed by the engine starter apparatus. A start command unit is connected to the control unit. When the engine has been stopped and then the start command unit gives the control unit a start command, the control unit powers the heater without performing an engine start process, thereby keeping the engine stopped for a predetermined period of time after the start command has been given, and subsequently performing the engine start process.

An internal combustion engine system

An internal combustion engine system includes a combustor arranged to repetitively receive air and fuel, combust the received air and fuel, and expand the combusted air and fuel, an expander including a cylinder and a piston arranged to reciprocate in the cylinder, the piston being connected to a crankshaft of the engine system, and an exhaust guide arranged to guide exhaust gases from the combustor to the expander, wherein the system is arranged to provide an injection of fuel into the exhaust guide and/or arranged to provide an injection of fuel into the combustor after a combustion in the combustor and before a reception of air and fuel in the combustor for a subsequent combustion.

EXHAUST GAS AFTERTREATMENT SYSTEM WITH A SELECTIVE CATALYTIC REDUCTION CATALYST MEMBER UPSTREAM OF A PARTICULATE FILTER

An exhaust gas aftertreatment system for an internal combustion engine includes an inlet conduit, a reductant decomposition chamber, a first selective catalytic reduction (SCR) catalyst member, a second SCR catalyst member, a mixing chamber, a particulate filter, a reductant delivery system, and a hydrocarbon delivery system. The inlet conduit is configured to receive exhaust gas from the internal combustion engine. The reductant decomposition chamber is fluidly coupled to the inlet conduit and configured to receive the exhaust gas from the inlet conduit. The first SCR catalyst member is fluidly coupled to the reductant decomposition chamber and configured to receive the exhaust gas from the reductant decomposition chamber. The second SCR catalyst member is fluidly coupled to the first SCR catalyst member and is configured to receive the exhaust gas from the first SCR catalyst member. 1. An exhaust gas aftertreatment system comprising:an inlet conduit configured to receive exhaust gas from an internal combustion engine;a reductant decomposition chamber fluidly coupled to the inlet conduit and configured to receive the exhaust gas from the inlet conduit;a first selective catalytic reduction (SCR) catalyst member fluidly coupled to the reductant decomposition chamber and configured to receive the exhaust gas from the reductant decomposition chamber;a second SCR catalyst member fluidly coupled to the first SCR catalyst member and configured to receive the exhaust gas from the first SCR catalyst member;a mixing chamber fluidly coupled to the second SCR catalyst member and configured to receive the exhaust gas from the second SCR catalyst member;a particulate filter fluidly coupled to the mixing chamber and configured to receive the exhaust gas from the mixing chamber;a reductant delivery system comprising a reductant dosing module coupled to the reductant decomposition chamber and configured to provide reductant into the reductant decomposition chamber; anda hydrocarbon ...

Method of Controlling Operation of an Engine Having Both an Exhaust Fluid Recirculation Apparatus and an Exhaust Fluid Treatment Apparatus

In an engine unit including a combustion unit and an exhaust fluid recirculation apparatus where unburnt fuel is provided to an exhaust flow treatment apparatus for combustion, it may be desirable to prevent unburnt fuel from entering the exhaust fluid recirculation apparatus. A method of controlling operation of an engine unit includes confirming that a valve of the exhaust flow recirculation apparatus is closed, and overriding a control signal for controlling the valve in order to ensure that the valve remains closed before injecting fuel upstream of the valve for combustion in the exhaust fluid treatment apparatus. 1. A method of controlling operation of an engine , the engine comprising:a combustion unit comprising at least one combustion cylinders, the combustion unit having an inlet and an outlet;an exhaust fluid treatment apparatus configured to receive fluid from the outlet;an exhaust fluid recirculation apparatus comprising a conduit for fluid communication between the combustion unit outlet and the combustion unit inlet and having a valve movable between open and closed positions, wherein the closed position is configured to prevent fluid flowing in the conduit between the combustion unit outlet and the combustion unit inlet; andan exhaust fluid recirculation controller configured to provide a primary signal for controlling the position of the valve element, confirming that the valve is in the closed position;', 'providing a secondary signal that the exhaust fluid recirculation valve should remain in the fully closed position, wherein the secondary signal overrides the primary signal; and', 'injecting fuel upstream of the valve for combustion in the exhaust fluid treatment apparatus., 'the method comprising2. The method of wherein the step of injecting fuel upstream of the valve for combustion in the exhaust fluid treatment apparatus comprises injecting fuel into at least one of the at least one combustion cylinders.3. The method of wherein the step of ...

EXHAUST PURIFICATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOremoval method which reduces NOcontained in an exhaust gas by a reducing intermediate which is generated by injecting hydrocarbons from the hydrocarbon feed valve within a predetermined range of period and a second NOremoval method in which an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by a period which is longer than this predetermined range are used. The switching temperatures ST and STof the exhaust purification catalyst at which temperature an NOremoval method is switched from the second NOremoval method to the first NOremoval method, are made lower if the amount of NOin the exhaust gas flowing into the exhaust purification catalyst increases. 1. An exhaust purification system for an internal combustion engine , the exhaust purification system comprising:an exhaust purification catalyst arranged in an engine exhaust passage; a hydrocarbon feed valve arranged in the engine exhaust passage upstream of the exhaust purification catalyst;a precious metal catalyst being carried on an exhaust gas flow surface of the exhaust purification catalyst;a basic layer provided around the precious metal catalyst; and an electronic control unit configured to:{'sub': X', 'X, 'perform a first NOremoval method which reduces NOcontained in an exhaust gas by a reducing intermediate, the reducing intermediate being held on the basic layer and generated by injecting hydrocarbons from the hydrocarbon feed valve within a predetermined range of period,'}{'sub': X', 'X, 'perform a second NOremoval method in which an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by a period which is longer than the predetermined range to make NOwhich was stored in the exhaust purification catalyst when the air-fuel ratio of the exhaust gas was lean be released from ...

Exhaust gas purification system

An exhaust gas purification system includes an exhaust purifying element for purifying exhaust gas, and a selective reduction catalyst for promoting reduction of NOx contained in the exhaust gas with a reducing agent. A housing for accommodating the exhaust purifying element includes an outer wall having an accommodating portion. A supply hole is formed on a bottom of the accommodating portion. A pipe that is located inside the housing has a passage through which an interior of the pipe communicates with an exterior of the pipe. The pipe is configured to guide exhaust gas toward the selective reduction catalyst through the passage and the interior of the pipe. The pipe has an end communicating with the supply hole. The injection device of the exhaust gas purification system injects the reducing agent to an interior of the pipe through the supply hole.

REDUCING AGENT SUPPLYING DEVICE

A reducing agent supplying device includes a reforming device, an obtaining section and a controller. The reforming device mixes fuel, which is a hydrocarbon compound, with air, and reforms the fuel by partially oxidizing the fuel with oxygen in the air. A reformed fuel is supplied into the exhaust passage as the reducing agent. The obtaining section obtains a physical quantity as a property index. The physical quantity has a correlation with property of the fuel that is supplied to the reforming device. The controller controls the reforming device according to the property index obtained by the obtaining section. 1. A reducing agent supplying device for a fuel combustion system that includes a NOx purifying device with a reducing catalyst arranged in an exhaust passage to purify NOx contained in exhaust gas of an internal combustion engine , the reducing agent supplying device supplying a reducing agent into the exhaust passage at a position upstream of the reducing catalyst , the reducing agent supplying device comprising:a reforming device that mixes fuel, which is a hydrocarbon compound, with air into a mixture and that reforms the fuel by partially oxidizing the fuel with oxygen in the air, a reformed fuel being supplied into the exhaust passage as the reducing agent;an obtaining section that obtains a physical quantity as a property index, the physical quantity having a correlation with property of the fuel that is supplied to the reforming device; anda controller that controls the reforming device according to the property index obtained by the obtaining section.2. The reducing agent supplying device according to claim 1 , whereinthe reforming device includes a heater that heats the mixture of the fuel and the air, the heater being controlled by the controller to adjust a temperature of the mixture to a target temperature, whereinthe controller changes the target temperature according to the property index when controlling the heater.3. The reducing agent ...

Anomaly diagnosing apparatus and method for addition valve

An air flowmeter is arranged in an intake passage. An air-fuel ratio sensor is arranged downstream of an addition valve in an exhaust passage. An estimated air-fuel ratio is calculated based on an intake air amount detected by the air flowmeter and the sum of a fuel amount injected by a fuel injection valve and a fuel amount added by the addition valve. It is determined that there is a stuck-closed anomaly in the addition valve if the logical conjunction is true of a condition that a detected value of the air-fuel ratio sensor is greater than the estimated air-fuel ratio by a margin greater than or equal to a specified amount and a condition that a detected value of the exhaust temperature sensor in a period in which the addition valve adds fuel is smaller than a reference value in the period by a margin greater than or equal to a predetermined amount.

CONTROL OF HYDROCARBON INJECTION RATE IN AN EXHAUST GAS ASSEMBLY

An exhaust gas assembly includes an exhaust gas tube configured to receive an exhaust gas from the internal combustion engine, which includes at least one cylinder. An oxidation catalytic device may be operatively connected to the exhaust gas tube and includes a catalyst. A first temperature sensor is operatively connected to the oxidation catalytic device. A controller is operatively connected to the first temperature sensor. A hydrocarbon injector is operatively connected to the controller and configured to selectively inject an amount of hydrocarbon at a hydrocarbon injection rate. The controller includes a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of controlling the hydrocarbon injection rate. The controller may be programmed to limit the hydrocarbon injection rate based at least partially on a combination of space velocity, temperature of the catalyst in the oxidation catalytic device and temperature of a particulate filter. 1. An exhaust gas assembly comprising:an exhaust gas tube configured to receive an exhaust gas;an oxidation catalytic device operatively connected to the exhaust gas tube and including a catalyst;a first temperature sensor operatively connected to the oxidation catalytic device;a controller operatively connected to the first temperature sensor;a hydrocarbon injector operatively connected to the controller and configured to selectively inject an amount of hydrocarbon at a hydrocarbon injection rate;a particulate filter operatively connected to the exhaust gas tube;a particulate filter temperature sensor operatively connected to the particulate filter; determine a space velocity for the exhaust gas;', 'determine a temperature of the oxidation catalytic device based at least partially on the first temperature sensor;', {'sub': '1', 'determine a first correction factor (F) based on the space velocity, the temperature of the oxidation catalytic device and a first look-up repository;'}, ...

Exhaust purification system of internal combustion engine

An internal combustion engine wherein an exhaust purification catalyst and hydrocarbon feed valve are arranged in an engine exhaust passage and wherein the NO X which is contained in the exhaust gas is removed by injection of hydrocarbons from the hydrocarbon feed valve by a predetermined period. Hydrocarbons are injected from the hydrocarbon feed valve toward the upstream side of the engine exhaust passage. When hydrocarbons are injected from the hydrocarbon feed valve by a predetermined period, the injection pressure of the hydrocarbons is made to gradually fall from injection start to injection end in the injection time period of each injection.

EXHAUST GAS PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE

An exhaust gas purification system of an internal combustion engine according to the present invention includes: processing means for executing at least one of a process of increasing an air-fuel ratio of an air-fuel mixture burned in the internal combustion engine and a process of increasing EGR gas recirculated by an EGR apparatus, when increasing a NOproportion in exhaust gas; and control means for controlling the processing means so that an increase in the air-fuel ratio becomes larger, and an increase in the EGR gas becomes smaller when a temperature of the exhaust gas purification apparatus is high as compared to when the temperature of the exhaust gas purification apparatus is low. 1. An exhaust gas purification system of an internal combustion engine , comprising:an exhaust gas purification apparatus which is arranged in an exhaust passage of the internal combustion engine and which includes a selective catalytic reduction catalyst;an EGR apparatus which recirculates a part of exhaust gas flowing through the exhaust passage as EGR gas; and{'sub': '2', 'a controller comprising at least one processor configured to, when increasing a NOproportion that is a proportion of nitrogen dioxide in NOx contained in the exhaust gas, execute both or one of a process of increasing an air-fuel ratio of an air-fuel mixture burned in the internal combustion engine and a process of increasing EGR gas recirculated by the EGR apparatus so that an increase in the air-fuel ratio becomes larger and an increase in the EGR gas becomes smaller when a temperature of the exhaust gas purification apparatus is high as compared to when the temperature of the exhaust gas purification apparatus is low.'}2. An exhaust gas purification system of an internal combustion engine , comprising:an exhaust gas purification apparatus which is arranged in an exhaust passage of the internal combustion engine and which includes a selective catalytic reduction catalyst;an EGR apparatus which recirculates a ...

Method of operating an aftertreatment system of an internal combustion engine

A method is disclosed for operating an aftertreatment system having a diesel particulate filter of an internal combustion engine of an automotive system. A regeneration event of the diesel particulate filter is started. The presence of an object ahead of the automotive system is detected. A value of a deceleration that the automotive system should perform in order to avoid a collision with the object is determined. A temperature of the diesel particulate filter is reduced if the value of the deceleration is greater than a first predetermined threshold value.

LIQUID FILTER AND TANK FILTER SYSTEM INCLUDING A LIQUID FILTER

A liquid filter for removing particles from a liquid, in particular from fuel or a urea solution, includes a first filter medium, a second filter medium, and a supporting frame including a supporting frame wall. The supporting frame wall includes first and front faces facing away from each other. The first filter medium is fastened to the first front face in a fluid-tight manner, and the second filter medium is fastened to the second front face in a fluid-tight manner. The supporting frame, the first filter medium, and the second filter medium enclose an interior space. The supporting frame includes a passage opening, a first filter element being situated in the interior space and being connected, in a fluid-conducting manner, to an exterior space of the liquid filter using the passage opening. 112-. (canceled)13. A liquid filter for removing particles from a liquid , the liquid filter comprising:a first filter medium;a second filter medium;a first filter element; anda supporting frame that encloses a passage opening and includes a supporting frame wall; the supporting frame wall includes a first front face and a second front face facing away from each other;', 'the first filter medium is fastened to the first front face in a fluid-tight manner;', 'the second filter medium is fastened to the second front face in a fluid-tight manner; and', 'the supporting frame, the first filter medium, and the second filter medium enclose an interior space in which the first filter element is arranged and that is connected, in a fluid-conducting manner via a passage opening, to an exterior space that is exterior to the liquid filter., 'wherein14. The liquid filter of claim 13 , wherein the first filter element includes a third filter medium.15. The liquid filter of claim 14 , wherein the first filter element includes a further supporting frame including a further supporting frame wall claim 14 , wherein the further supporting frame wall includes a third front face to which the ...

Reactor Apparatus and Method for Reducing NOx from Exhaust Gases Produced by Industrial Processes

A reactor apparatus and method for removing and/or reducing NOx, CO, carbon particulates and hydrocarbons from exhaust gases produced by industrial processes includes a reactor including an inlet plenum, a reaction chamber, an outlet plenum, and a heat exchanger wherein gases exiting the reaction chamber heat gases entering the reaction chamber. EGR is drawn through a cooling heat exchanger with an injection blower and is delivered through control valves to the reaction chamber, the inlet plenum and to an add fuel mixing chamber whereby mixed fuel and EGR is delivered to the reaction chamber. A feedback controller controls the flow valves responsive to the temperatures in the reaction chamber entrance and the outlet plenum.

Diagnostic device

A diagnostic device includes: a diesel oxidation catalyst (DOC) for oxidizing hydrocarbon (HC) and nitrogen monoxide in an exhaust gas; a selective catalytic reduction (SCR) catalyst for reducing and purifying NOx contained in the exhaust gas; a NOx purification rate calculation unit which calculates, based on NOx values at upstream and downstream sides of the SCR catalyst, a low temperature NOx purification rate and a high temperature NOx purification rate; a HC heat generation rate calculation unit which calculates an HC purification rate based on at least the difference between the exhaust gas heat quantities at upstream and downstream sides of the DOC; and a deterioration determination unit which determines the deterioration in the NO 2 producing capability of the DOC based on the calculated low temperature NOx purification rate, the calculated high temperature NOx purification rate, and the calculated HC purification rate.

FUEL SUPPLY DEVICE FOR ENGINE INJECTION AND EXHAUST-GAS AFTERTREATMENT

A fuel supply device (), in particular for use in a motor vehicle comprising an internal combustion engine (), has a fuel supply pump () which is designed to remove fuel () from a fuel tank () and to release said fuel under increased pressure through an outlet; a first fluid connection () which is provided for connecting an exhaust line metering device () and; a second fluid connection () which is provided for connecting an engine injection device (). The first fluid connection () is directly connected to the outlet of the fuel supply pump (). A fluid choke () is arranged between the outlet of the fuel supply pump () and the second fluid connection (). The invention enables an exhaust line metering device () and an engine injection device () to be operated reliably on a common fuel supply device (). 110-. (canceled)112. A fuel supply device () comprising{'b': 4', '28', '6, 'a controllable fuel delivery pump (), which is configured to extract fuel () from a fuel tank () and to output said fuel at elevated pressure through an outlet,'}{'b': 7', '8, 'a first fluid port (), which is configured for the connection of an exhaust-tract dosing apparatus (), and'}{'b': 10', '12, 'a second fluid port (), which is configured for the connection of an engine injection apparatus (),'}{'b': 7', '9', '4, 'wherein the first fluid port () is connected directly or via a fuel filter () to the outlet of the fuel delivery pump (),'}{'b': 16', '4', '10, 'wherein a fluid throttle () is arranged between the outlet of the fuel delivery pump () and the second fluid port (), and'}{'b': '2', 'claim-text': [{'b': 4', '10', '12, 'during normal operation, set the delivery quantity of the controllable fuel delivery pump () such that a provided fuel quantity is sufficient to provide, at the second fluid port (), a fuel quantity required by the engine injection apparatus (), and'}, {'b': 4', '8', '7', '22, 'during regeneration operation, increase a delivery power of the fuel delivery pump () and ...

Vehicle having a nitrogen oxides storage converter and on-board method for monitoring and diagnosing the nitrogen oxides storage converter

A vehicle includes a NOx storage converter to receive exhaust gases from a diesel engine, store at least a minimum amount of the NOx at a temperature below a storage threshold, release the NOx at a temperature above a releasing threshold, oxidize hydrocarbon, and oxidize carbon monoxide. An input temperature sensor at an entrance to the NOx storage converter determines an input temperature of the exhaust gases. An output temperature sensor is at an output of the NOx storage converter to determine an output temperature of the exhaust gases. A control module receives the input temperature and the output temperature, determines a magnitude of an exotherm in the NOx storage converter, and stores an electronic fault code in a computer memory in response to the magnitude of the exotherm being below a minimum temperature. The fault code indicates a reduction in a NOx storage capacity of the NOx storage converter.

Internal combustion engine and exhaust aftertreatment system

An internal combustion engine has an exhaust treatment system with a fluid injection system and a swirl can plenum mixer for mixing injected fluid with exhaust gas exhausted from the engine. The mixer comprises a canister having an inner plenum. A bulkhead separates the inner plenum into an exhaust gas collector and a diffuser chamber. A flow port opens through the bulkhead to a tangential flow director on the downstream side of the bulkhead to collect the exhaust gas. A fluid injector port receives a fluid injector for dispensing a fluid into the exhaust gas for mixing with the exhaust gas in the swirl can plenum mixer. A tangential flow director nozzle is configured to dispense the exhaust gas and fluid into the downstream plenum in a tangential flow trajectory, wherein mixing and vaporization of the exhaust gas and fluid mixture with the exhaust gas is accomplished.

Exhaust gas purification system and exhaust gas purification method

A high-temperature NOx occlusion reduction type catalyst in which an NOx occlusion material containing an alkali metal is supported, and a low-temperature NOx occlusion reduction type catalyst in which an NOx occlusion material containing an alkaline earth metal is supported, are disposed in series on an upstream side and a downstream side, respectively, of an exhaust gas purification system. An oxidation catalyst is disposed on an upstream side of the high-temperature NOx occlusion reduction type catalyst. The desulfurization of the NOx occlusion reduction type catalysts is facilitated, and the NOx reduction efficiency is improved by the partial oxidation of hydrocarbons in the exhaust gas, while a wide NOx active temperature window is achieved.