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Небесная энциклопедия

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

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Мониторинг СМИ

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

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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 5299. Отображено 100.
05-01-2012 дата публикации

Diesel engine system and control method for a diesel engine system

Номер: US20120000448A1
Принадлежит: General Electric Co

A diesel engine system includes a cylinder, an exhaust manifold, an exhaust gas recirculation (EGR) manifold, and a valve. The exhaust manifold is fluidly coupled with the cylinder and directs exhaust generated in the cylinder to an exhaust outlet that delivers the exhaust to an external atmosphere. The EGR manifold is fluidly coupled with the cylinder and recirculates the exhaust generated in the cylinder back to the cylinder as at least part of intake air that is received by the cylinder. The valve is disposed between the cylinder and the exhaust manifold and between the cylinder and the EGR manifold. The valve has a donating mode and a non-donating mode. The valve fluidly couples the cylinder with the EGR manifold when the valve is in the donating mode and fluidly couples the cylinder with the exhaust manifold when the valve is in the non-donating mode.

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20-10-2012 дата публикации

Система рециркуляции выхлопных газов (варианты)

Номер: RU0000121301U1

1. Система рециркуляции выхлопных газов в транспортном средстве, содержащая турбину, подключенную ниже по потоку к выпускному коллектору; и трубопровод рециркуляции выхлопных газов, содержащий первый канал, соединенный с выпускным патрубком непосредственно после турбины ниже ее по потоку, причем угол между осью первого канала и осью вращения турбины является непрямым; и второй канал, соединенный с впускной системой. ! 2. Система рециркуляции выхлопных газов по п.1, в которой указанный патрубок представляет собой корпус выпуска турбины. ! 3. Система рециркуляции выхлопных газов по п.1, в которой угол между осью первого канала и осью вращения турбины имеет значения от 0 до 90°. ! 4. Система рециркуляции выхлопных газов по п.1, в которой первый канал выполнен заподлицо с выпускным патрубком. ! 5. Система рециркуляции выхлопных газов по п.1, дополнительно содержащая устройство управления выбросами, соединенное с выпускным патрубком. ! 6. Система рециркуляции выхлопных газов по п.1, в которой второй канал присоединен выше по потоку компрессора. ! 7. Система рециркуляции выхлопных газов по п.1, в которой первый канал расположен вертикально над выходом перепускного клапана. ! 8. Система рециркуляции выхлопных газов по п.7, в которой перепускной клапан расположен внутри корпуса турбины. ! 9. Система рециркуляции выхлопных газов по п.1, дополнительно содержащая выпускной трубопровод, соединенный с корпусом турбины, и трубопровод рециркуляции выхлопных газов, отходящий от первого канала, причем выпускной трубопровод выполнен изогнутым. ! 10. Система рециркуляции выхлопных газов по п.9, в которой изгиб выпускного трубопровода прохо� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 121 301 (13) U1 (51) МПК F01N 9/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (21)(22) Заявка: 2012123981/28, 09.06.2012 (24) Дата начала отсчета срока действия патента: 09.06.2012 (73) Патентообладатель(и): Форд Глобал Технолоджис, ЛЛК (US) ...

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27-05-2015 дата публикации

Система для указания воды в датчике кислорода на основании потребляемой мощности нагревателя датчика

Номер: RU0000152379U1

1. Система для двигателя, содержащая:впускной коллектор, включающий в себя впускной дроссель;охладитель наддувочного воздуха, расположенный выше по потоку от впускного коллектора;датчик кислорода, расположенный на выходе охладителя наддувочного воздуха, при этом датчик кислорода включает в себя нагревательный элемент; иконтроллер с машинно-читаемыми командами для указания воды в датчике кислорода в ответ на увеличение потребляемой мощности нагревательного элемента датчика кислорода более высокое, чем пороговое значение, во время выбранного состояния.2. Система по п.1, в которой машинно-читаемые команды дополнительно включают в себя команды для настройки условий эксплуатации двигателя на основании указания воды в датчике кислорода, причем условия эксплуатации двигателя включают в себя одно или более из открывания впускного дросселя и установки момента зажигания, при этом выбранное состояние чувствительно к влажности окружающей среды, большей, чем пороговое значение. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 152 379 U1 (51) МПК F02B 29/04 (2006.01) F02D 45/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ (21)(22) Заявка: ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2014133365/06, 13.08.2014 (24) Дата начала отсчета срока действия патента: 13.08.2014 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): СУРНИЛЛА Гопичандра (US), СОЛТИС Ричард И. (US), МАКЛЕД Дэниел А. (US), КЛАРК Тимоти Джозеф (US) (45) Опубликовано: 27.05.2015 Бюл. № 15 1 5 2 3 7 9 R U (57) Формула полезной модели 1. Система для двигателя, содержащая: впускной коллектор, включающий в себя впускной дроссель; охладитель наддувочного воздуха, расположенный выше по потоку от впускного коллектора; датчик кислорода, расположенный на выходе охладителя наддувочного воздуха, при этом датчик кислорода включает в себя нагревательный элемент; и контроллер с машинно-читаемыми командами для указания воды в датчике кислорода в ответ на увеличение потребляемой мощности нагревательного ...

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10-06-2015 дата публикации

Система для датчика кислорода

Номер: RU0000152517U1

1. Система двигателя, содержащая:двигатель, включающий в себя впускной коллектор;турбонагнетатель, включающий в себя турбину в системе выпуска и компрессор в системе впуска;охладитель наддувочного воздуха, присоединенный ниже по потоку от компрессора;датчик кислорода на впуске, присоединенный к впускному коллектору ниже по потоку от охладителя наддувочного воздуха и выше по потоку от впускного дросселя;датчик давления, присоединенный к впускному коллектору ниже по потоку от охладителя наддувочного воздуха и выше по потоку от впускного дросселя;систему рециркуляции отработавших газов (EGR), включающую в себя канал EGR и клапан EGR, для рециркуляции отработавших остаточных газов из местоположения ниже по потоку от турбины в местоположение выше по потоку от компрессора; иконтроллер с машиночитаемыми командами для:во время состояния перекрытия топлива при замедлении двигателя,изучения опорной точки для упомянутого датчика кислорода при опорном давлении на впуске; инастройки открывания клапана EGR на основании концентрации кислорода на впуске, оцененной упомянутым датчиком относительно изученной опорной точки, и дополнительно на основании давления на впуске относительно опорного давления на впуске.2. Система по п. 1, дополнительно содержащая датчиквлажности для оценки влажности окружающей среды, причем контроллер включает в себя дополнительные команды для дополнительной настройки открывания клапана EGR на основании влажности окружающей среды относительно опорной влажности. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК F02M 25/07 F02D 23/00 F02D 41/00 G01M 15/02 (13) 152 517 U1 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ (21)(22) Заявка: ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2014139711/06, 30.09.2014 (24) Дата начала отсчета срока действия патента: 30.09.2014 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): КЛАРК Тимоти Джозеф (US), СУРНИЛЛА Гопичандра (US), ГЕРХАРТ Мэттью Джон (US), СТАЙЛЗ Дэниел ...

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10-10-2015 дата публикации

Система двигателя

Номер: RU0000155440U1

1. Система двигателя, содержащая:двигатель, содержащий впуск и выпуск;турбонагнетатель, содержащий впускной компрессор, приводимый в действие выпускной турбиной;охладитель наддувочного воздуха, присоединенный ниже по потоку от компрессора;первый канал рециркуляции компрессора, содержащий первый клапан и диффузор, причем первый канал присоединяет выпуск охладителя наддувочного воздуха к впуску компрессора, а диффузор расположен ниже по потоку от первого клапана в канале;второй канал рециркуляции компрессора, содержащий второй клапан, причем второй канал присоединяет выпуск охладителя наддувочного воздуха к впуску компрессора, и второй канал расположен параллельно первому каналу;канал рециркуляции выхлопных газов (EGR), содержащий клапан EGR для рециркуляции выхлопных остаточных газов на впуск двигателя через первый канал рециркуляции компрессора, причем канал EGR присоединен к первому каналу на диффузоре; иконтроллер с машиночитаемыми командами дляв ответ на требование EGR,открывания клапана EGR;увеличения открывания первого клапана на основании требования EGR для рециркуляции сжатого воздуха через диффузор и формирования разрежения на диффузоре; ивтягивания EGR в двигатель с использованием разрежения, сформированного на диффузоре.2. Система по п. 1, в которой контроллер содержит дополнительные команды для увеличения открывания второго клапана наряду с сохранением открывания первого клапана в ответ на указание помпажа.3. Система по п. 1, в которой открывание первого клапана дополнительно основано на давлении выхлопных газов, оцененном выше по потоку от впуска канала EGR, причем открывание первого клапана у� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК F02D 23/00 F02B 37/00 F02M 25/07 F02B 29/04 (13) 155 440 U1 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ (21)(22) Заявка: ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2014133173/06, 12.08.2014 (24) Дата начала отсчета срока действия патента: 12.08.2014 Приоритет(ы ...

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01-03-2012 дата публикации

Internal combustion engine

Номер: US20120048244A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An internal combustion engine comprises a cylinder configured to operate on a four-stroke combustion cycle, a dedicated EGR cylinder configured to operate on a two-stroke combustion cycle and an EGR supply conduit extending between an exhaust port of the dedicated EGR cylinder and the cylinder configured to operate on a four-stroke combustion cycle for delivery of exhaust gas exiting the dedicated EGR cylinder to the cylinder configured to operate on a four-stroke combustion cycle for combustion therein.

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24-05-2012 дата публикации

Engine assembly including combustion chambers with different port arrangements

Номер: US20120125282A1
Автор: Alan W. Hayman
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An engine assembly may include an engine block, a first piston, a second piston, and a cylinder head. The first piston may be located in a first cylinder bore and the second piston may be located in a second cylinder bore. The cylinder head may be coupled to the engine block and cooperate with the first cylinder bore and the first piston to define a first combustion chamber and with the second cylinder bore and the second piston to define a second combustion chamber. The cylinder head may define a first intake and exhaust port arrangement in communication with the first combustion chamber and may define a second intake and exhaust port arrangement in communication with the second combustion chamber. The second intake and exhaust port arrangement may include a greater total number of ports than the first intake and exhaust port arrangement.

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07-06-2012 дата публикации

Movement transformation device and valve comprising such a device

Номер: US20120138831A1
Принадлежит: Valeo Systemes de Controle Moteur SAS

The invention relates to a device for transforming a rotation of a gear ( 5 ) into a translation of a slide ( 2, 8 ), the device including a supporting member ( 9 ) provided with a fixed tubular wall ( 10 ) translatably connected to the slide ( 2, 8 ) by a cam channel ( 11 ), the gear ( 5 ) being rotatably mounted on the supporting member ( 9 ) and rotatably connected to the slide ( 2, 8 ) which is suitable for pivoting about an axis. The gear ( 5 ) comprises a ring ( 15 ) rotatably mounted on the tubular wall ( 10 ) of the supporting member ( 9 ).

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02-08-2012 дата публикации

System for diagnosing error conditions of a gas flow control system for diesel engines

Номер: US20120197550A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A combustion engine evaluation unit is provided that includes, but is not limited to a microcontroller receiving measurement signals from a gas flow control system and outputting a state signal of the gas flow control system. The microcontroller includes, but is not limited to input ports for receiving as first set of measurement signals. Furthermore, the microcontroller includes, but not limited to input ports for receiving as a second set of measurement signals. The microcontroller is configured to calculate a first set of predicted values with a gas flow model based on the first set of measurement signals and calculate a second set of predicted values with a nominal model based on the second set of measurement signals. The microcontroller is also configured to generate the state signal based on a comparison of the first set of predicted values with the second set of predicted values.

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30-08-2012 дата публикации

Systems and methods for exhaust gas recirculation

Номер: US20120216530A1
Принадлежит: General Electric Co

An engine system includes a first cylinder group, a second cylinder group, an inlet manifold coupled to the first cylinder group and the second cylinder group, an inlet passage coupled to the inlet manifold to provide inlet air to the inlet manifold, a first exhaust manifold coupled to the first cylinder group, a second exhaust manifold coupled to the second cylinder group, and a mixer pipe positioned within the second exhaust manifold and/or the intake passage to mix exhaust gas recirculation (EGR) gases exhausted by the second cylinder group that are delivered through the second exhaust manifold with inlet air. The mixer pipe forms an inlet end that is coupled to the second exhaust manifold and an outlet end that is located upstream of the cylinders in the first cylinder group and the cylinders in the second cylinder group.

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13-09-2012 дата публикации

Method and System for Humidity Sensor Diagnostics

Номер: US20120227719A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for an engine including a humidity sensor. Degradation of the humidity sensor may be determined based on a change in intake air relative humidity as compared to a change in intake air temperature or pressure, under selected conditions. An amount of exhaust gas recirculated to an engine intake is adjusted differently based on whether the humidity sensor is degraded or functional.

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18-10-2012 дата публикации

Internal combustion engine

Номер: US20120260894A1
Автор: Alan W. Hayman
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An internal combustion engine comprises a four stroke working cylinder, a four stroke EGR cylinder, an intake system for supplying a combustion air charge to the cylinders, a first exhaust system for removing exhaust gas from the four stroke working cylinder and to the atmosphere and a second exhaust system for removing exhaust from the four stroke EGR cylinder and to the intake system, wherein the combustion air charge is a combination of combustion air and exhaust gas from the four stroke EGR cylinder.

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22-11-2012 дата публикации

Diagnostic apparatus for catalyst in fuel-property reforming system

Номер: US20120291424A1
Принадлежит: Denso Corp

A diagnostic apparatus for a catalyst in a fuel-property reforming system includes an inlet-side temperature sensor disposed upstream of the fuel-reforming catalyst and an outlet-side temperature sensor disposed downstream of the fuel-reforming catalyst. In a reforming driving mode, while the EGR valve is opened to recirculate a part of exhaust gas into the intake pipe, a reforming-fuel injector injects a reforming fuel into the EGR gas. A fuel-reforming catalyst reforms the fuel into a fuel having high-combustibility. A differential temperature between a temperature detected by the inlet-side temperature sensor and a temperature detected by the outlet-side temperature sensor is compared with a deterioration-determination threshold, whereby a computer determines whether the fuel-reforming catalyst is deteriorated.

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22-11-2012 дата публикации

Method for biodiesel blending detection based on fuel post-injection quantity evaluation

Номер: US20120291529A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method for detecting the blending level of biodiesel fuel in an internal combustion engine includes setting at least two post injection fuel quantity reference values respectively for known biodiesel blending percentage levels. A post injection fuel quantity value is evaluated and is compared with the at least two post injection fuel quantity reference value. A predetermined correlation set of values between the post injection fuel quantity value and a biodiesel blending level expressed by biodiesel percentage with respect to the petro-diesel is used to determine the biodiesel blending level.

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29-11-2012 дата публикации

System and Method to Control an Electronically-Controlled Turbocharger

Номер: US20120297767A1
Автор: Peter Hofbauer
Принадлежит: EcoMotors International Inc

By providing an electrically-controlled turbocharger (ECT) on a compression-ignition (CI) engine, the engine can be provided a desired lambda and a desired EGR fraction over the range of operating conditions. When lambda in the exhaust is leaner than the desired lambda, electrical energy to the electric motor of the ECT is reduced to bring actual lambda to desired lambda. Analogously, when lambda in the exhaust is richer than the desired lambda, electrical energy to the ECT is increased.

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06-12-2012 дата публикации

Systems and methods for an engine

Номер: US20120304887A1
Автор: Manoj Gokhale
Принадлежит: General Electric Co

Various methods and systems for an engine are provided. In one example, an engine system includes an exhaust passage through which exhaust gas is configured to flow from the engine, and a turbocharger with a turbine positioned in the exhaust passage. The engine system further includes an exhaust gas treatment system disposed in the exhaust passage upstream of the turbine, the exhaust gas treatment system including at least one exhaust gas treatment device and a bypass with a bypass valve, the bypass valve configured to be adjusted to reduce exhaust gas flow through the exhaust gas treatment system in response to a transient engine operating condition.

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07-03-2013 дата публикации

Cylinder head having egr gas cooling structure, and method for manufacturing same

Номер: US20130055970A1
Принадлежит: Toyota Motor Corp

It has been difficult to manufacturing a cylinder head having an EGR gas cooling structure which has high cooling performance and can be easily configured. A cylinder head having an EGR gas cooling structure is configured in such a manner that a gas passage which guides to the air intake port side a part of the exhaust gas discharged from the exhaust port is disposed within the cylinder head water jacket to cool the exhaust gas flowing through the gas passage. The gas passage comprises a cooling section which makes contact with the coolant within the cylinder head water jacket, and also comprises a hollow pipe which has high-strength sections located at side portions of the cooling section and having higher strength than the cooling section. The high-strength sections of the gas passage are molded within and surrounded by the cylinder head.

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11-04-2013 дата публикации

Exhaust port structure of cylinder head

Номер: US20130086891A1
Автор: Hyunwook Ryu, Seung Woo Ko
Принадлежит: Hyundai Motor Co, Kia Motors Corp

An exhaust port structure of a cylinder head includes a connection pipe communicating with a plurality of exhaust ports of the cylinder head and an exhaust hole connected to the connection pipe and performing a function of an exhaust manifold, wherein the connection pipe has an EGR line integrally formed and connected thereto and each of the exhaust ports is formed with the same shape or a symmetrical shape, and the present invention can reduce the weight of the cylinder head and the manufacturing cost and improve the EGR rate and T/C efficiency.

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02-05-2013 дата публикации

Exhaust gas recirculation in a reciprocating engine having a multiple-stroke configuration

Номер: US20130104542A1
Автор: Adam Edgar Klingbeil
Принадлежит: General Electric Co

An engine comprising at least two cylinders and a turbocharger that includes a turbine operationally attached to a compressor. The intake air for the cylinders is routed through the compressor and exhaust gas from one of the cylinders is recirculated to the air fuel mixture for both cylinders, which exhaust gas from the other cylinder is routed through the turbine, further wherein the first reciprocating cylinder operates on a four-stroke cycle and the second reciprocating cylinder operates on a two-stroke cycle. Methods of operating an engine are disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

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16-05-2013 дата публикации

Intake system

Номер: US20130118433A1
Автор: Tohru Tochizawa
Принадлежит: Honda Motor Co Ltd

Provided is an intake system that enables extension of an intake air introduction pipe without increasing the external dimension of the intake system. The intake system comprises: a plurality of branch pipes ( 27 - 30 ) which are arranged one next to the other and communicate at downstream ends thereof with a plurality of intake ports ( 14 ) provided in an engine ( 10 ), respectively, each branch pipe extending from the downstream end thereof to an upstream end thereof in a curved manner; an intake chamber ( 26 ) communicating with the upstream ends of the branch pipes; and an intake air introduction pipe ( 25 ) having a downstream end communicating with the intake chamber, wherein the intake air introduction pipe has a section that extends in a space defined between the branch pipes and the engine in a direction of arrangement of the branch pipes.

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06-06-2013 дата публикации

Exhaust gas recirculation device for internal combustion engine

Номер: US20130139794A1
Принадлежит: Mitsubishi Heavy Industries Ltd

An exhaust gas recirculation device for an internal combustion engine includes: an opening command signal output unit 52 which outputs an opening command signal in relation to an EGR control valve on the basis of an operating condition of the internal combustion engine; a variation component separation unit 54 which separates the valve opening command signal from the opening command signal output unit 52 into a basic component and a variation component generated so as to be superimposed on the basic component; a variation component determination unit 56 which determines whether the EGR control valve is in a steady state or a transient state on the basis of a magnitude of the variation component separated by the variation component separation unit 54 ; and an EGR control valve diagnosis device 58 that performs an abnormality diagnosis on the EGR control valve when the variation component determination unit determines that the EGR control valve is in the steady state.

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15-08-2013 дата публикации

Engine

Номер: US20130206121A1
Автор: Hiroyasu Nishikawa
Принадлежит: Individual

An engine includes an EGR apparatus which refluxes a portion of exhaust gas from an exhaust manifold to an intake manifold as EGR gas. A differential pressure sensor detects a differential pressure between intake pressure of the intake manifold and exhaust pressure in the exhaust manifold. The differential pressure sensor is mounted on a head cover which covers an upper portion of a cylinder head. An intake pressure taking-out passage which is in communication with the intake manifold is formed in the cylinder head. An intake pressure introducing passage which is connected to the differential pressure sensor is formed in the head cover. The intake pressure taking-out passage and the intake pressure introducing passage are in communication with each other.

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22-08-2013 дата публикации

Exhaust gas recirculation valve contaminant removal

Номер: US20130213007A1
Принадлежит: Cummins Inc

An exhaust gas purification system including an exhaust gas passageway which routes a flow of exhaust gas from an exhaust gas source to an intake manifold; an exhaust gas passageway valve which controls flow to the intake manifold; a cooling system coupled with the exhaust passageway positioned at a location upstream of the exhaust gas source and downstream of the intake manifold and operable to transfer heat from the flow of exhaust gas to a coolant in flow communication with the cooling system; a bypass passageway coupled with the exhaust gas passageway and bypassing the cooling system; a bypass valve operable to control flow through the bypass passageway; at least one valve operation sensor; and a controller operable to control the bypass valve to direct the flow of exhaust gas to the bypass passageway during exhaust gas recirculation based on a signal from the valve operation sensor.

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29-08-2013 дата публикации

Fuel Injection Strategy for Internal Combustion Engine Having Dedicated EGR Cylinders

Номер: US20130220286A1
Принадлежит: Southwest Research Institute SwRI

A method using exhaust gas recirculation (EGR) in an internal combustion engine. The engine has at least one “dedicated EGR cylinder”, whose entire exhaust is recirculated back to all the engine cylinders. The dedicated EGR cylinder is operated at a rich air-fuel ratio, and the other cylinders are operated stoichiometrically so that a conventional three way catalyst may be used to treat the exhaust. A fuel injector is used to inject fuel into the combustion chamber of the dedicated EGR cylinder after initiation of the main combustion event. This post injection method overcomes flammability limits of a dedicated EGR cylinder, and increases the hydrogen (H2) and carbon monoxide (CO) in its exhaust.

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24-10-2013 дата публикации

Spark-ignition internal combustion engine having wall portion separating at least the two cylinders

Номер: US20130276754A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

The application relates to spark initiation under varied aircharge density and composition. An engine is disclosed comprising at least two cylinders with spark plugs therein; an integrated exhaust manifold, the integrated exhaust manifold having a wall portion and an adjustable shutoff element within the wall portion wherein the wall portion divides exhaust pipes of the at least two cylinders and the adjustable shutoff element allows exhaust gas from a first cylinder into an exhaust pipe of an adjacent cylinder. Hot exhaust gas may be taken into an adjacent cylinder serving as ignition gas and allowing the engine of the present disclosure to undergo spark ignition at low loads, or autoignition at high loads.

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21-11-2013 дата публикации

Exhaust gas recirculation device of multi-cylinder engine

Номер: US20130306041A1
Автор: Tatsuya Koga
Принадлежит: Mazda Motor Corp

An exhaust gas recirculation device is provided. The device recirculates, from an exhaust system to an intake system, a part of exhaust gas from a plurality of cylinders of a multi-cylinder engine as EGR gas. The device includes a single EGR pipe extending from the exhaust system toward the intake system, an EGR manifold branching from a downstream end portion of the EGR pipe toward each cylinder, and an EGR valve for adjusting an EGR gas amount. The EGR manifold has one or more common EGR passages having a single pipe portion and branched pipe portions, and one or more independent EGR passages. Each shape of the common and independent EGR passages is set so that a communicating path in the EGR manifold communicating an arbitrary cylinder with a cylinder where combustion is performed subsequently thereto has the same volume for any cylinder combination having the adjacent combustion order.

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21-11-2013 дата публикации

Controller for internal combustion engine

Номер: US20130311070A1
Принадлежит: Aisan Industry Co Ltd, Toyota Motor Corp

A controller includes an exhaust gas recirculation (EGR) system for performing EGR control, the system including an EGR passage for recirculating exhaust gas per cylinder and an EGR device for controlling a flow rate of the exhaust gas to be recirculated. The controller is arranged to perform internal combustion engine by learning control of an air-fuel ratio (A/F) during the EGR control. This controller includes a blocking determination section including first and second determination sections to determine blocking of the EGR passage in a specified cylinder. The blocking determination section is configured so that the first determination section makes preliminary determination of blocking of the EGR passage and the second determination section makes main determination of blocking of the EGR passage.

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26-12-2013 дата публикации

Engine with dedicated egr exhaust port and independent exhaust valve control

Номер: US20130340728A1
Автор: Edward J. Keating
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An engine assembly includes an engine block defining a cylinder, an exhaust system, and an exhaust gas recirculation system. A first cam-actuated exhaust valve is configured to control the flow of fluid from the cylinder to the exhaust system. A second cam-actuated exhaust valve configured to control the flow of fluid from the cylinder to the exhaust gas recirculation system. The timing of the second valve is adjustable independently of the timing of the first valve, thereby enabling control of EGR flow through manipulation of exhaust valve timing.

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09-01-2014 дата публикации

Throttle valve assembly

Номер: US20140007835A1
Принадлежит: DELPHI AUTOMOTIVE SYSTEMS LUXEMBOURG SA

A throttle valve assembly includes a valve housing having a main channel and an auxiliary channel. A main throttle valve is pivotally mounted in the main channel, and an auxiliary throttle valve pivotally is mounted in the auxiliary channel. A common rotating actuator controls the opening angle of both the main throttle valve and the auxiliary throttle valve through an actuating mechanism. The actuating mechanism includes a crank mechanism connected between an auxiliary pivoting shaft and a gear train driven by the rotating actuator.

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30-01-2014 дата публикации

Variable valve timing for egr control

Номер: US20140026872A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for adjusting cylinder valve timings to enable a group of cylinders to operate and combust while another group of cylinders on a second are selectively deactivated. Valve timing may be adjusted to allow flow of air through the inactive cylinders to be reduced, lowering catalyst regeneration requirements upon reactivation. The valve timing may alternatively be adjusted to enable exhaust gas to be recirculated to the active cylinders via the inactive cylinders, providing cooled EGR benefits.

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06-03-2014 дата публикации

Spark-ignition direct injection engine

Номер: US20140060489A1
Принадлежит: Mazda Motor Corp

A spark-ignition direct injection engine is provided. The engine includes an engine body, a fuel injection valve, a fuel pressure setting mechanism, an ignition plug, and a controller. The controller operates the engine to perform compression-ignition combustion within a first operating range, and controls the ignition plug to operate the engine to perform spark-ignition combustion within a second operating range. Within a specific part of the first range, the controller sets the fuel pressure to 30 MPa or above, and retards the compression ignition to after a compression top dead center by controlling the injection valve to inject fuel into a cylinder in a period from a late stage of compression stroke to an early stage of expansion stroke. Below the specific part, the controller controls the fuel injection valve to inject the fuel into the cylinder in a period from intake stroke to a mid-stage of the compression stroke.

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13-03-2014 дата публикации

Catalyst heating with exhaust back-pressure

Номер: US20140069080A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Embodiments for controlling an exhaust back-pressure valve are provided. In one example, a method for operating an engine comprises closing an exhaust back-pressure valve in response to a component temperature, and adjusting intake and/or exhaust valve operation in response to closing the exhaust back-pressure valve to reduce cylinder internal exhaust gas recirculation (EGR). In this way, combustion stability may be maintained while the exhaust back-pressure valve is closed.

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05-01-2017 дата публикации

ENGINE ARRANGEMENTS WITH EGR SYSTEMS

Номер: US20170002772A1
Принадлежит:

Systems, apparatus, and methods are disclosed that include a divided exhaust engine with at least one pair of primary EGR cylinders and a plurality of pairs of non-primary EGR cylinders. The pair of primary EGR cylinders can be connected to an intake with an EGR system that lacks an EGR cooler. In another embodiment, the cylinder pairs include exhaust flow paths that join in the cylinder head to form a common exhaust outlet for each cylinder pair in the cylinder head that is connected directly to the EGR system or to the exhaust system without an exhaust manifold. 1. A system comprising:an internal combustion engine including at least one pair of primary exhaust gas recirculation (EGR) cylinders connected to a common EGR passage to provide an EGR flow to an intake of the engine and a plurality of pairs of non-primary cylinders with each non-primary cylinder pair connected to a respective one of a plurality of common exhaust passages to provide an exhaust flow to a respective one of a plurality of turbines connected to the respective common exhaust passage.2. The system of wherein the common EGR passage and the common exhaust passages are formed in a cylinder head of the engine.3. The system of claim 1 , wherein each of the plurality of turbines is mounted directly to the cylinder head at an outlet of the respective common exhaust passage claim 1 , and further comprising an EGR cooler mounted to the cylinder head at an outlet of the common EGR passage.4. The system of claim 1 , wherein each of the plurality of turbines includes a compressor in a respective intake conduit to compress an intake air flow.5. The system of claim 4 , wherein the compressed intake air flows from the intake conduits combine at an intake air cooler.6. The system of claim 5 , further comprising an intake passage connecting the intake cooler to the intake and the manifold and the common EGR passage is connected to the intake passage downstream of the intake air cooler.7. The system of claim 6 , ...

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05-01-2017 дата публикации

Internal Combustion Engine Having Six Cylinders With Two of the Cylinders Being Dedicated EGR Cylinders Controlled With Dual EGR Valve

Номер: US20170002774A1
Принадлежит: SOUTHWEST RESEARCH INSTITUTE

An exhaust gas recirculation (EGR) system for an internal combustion engine having two dedicated EGR cylinders. A dual valve system is used to control the output of the dedicated EGR cylinders so that the engine may intake EGR exhaust from both, only one, or neither of the dedicated EGR cylinders. 1. A valve system for an internal combustion engine having two dedicated EGR cylinders , one dedicated EGR cylinder exhausting EGR exhaust to a first EGR outlet and the other dedicated EGR cylinder exhausting EGR exhaust to a second EGR outlet , and the engine having an EGR loop and a main exhaust line , the valve system comprising:a first input line providing fluid flow communication from the first EGR outlet to the main exhaust line;a second input line providing a fluid flow communication from the second EGR outlet to the EGR loop;a first cross-over line providing a fluid flow communication from the first input line to the second input line;a first valve located upstream a connection of the first input line and the first cross-over line and at a connection of the first input line to the main exhaust line;a second cross-over line providing fluid flow communication from the first valve to the EGR loop;a second valve on the second input line, located at a connection between the first cross-over line and the second input line;wherein the first valve is operable to direct EGR exhaust from the first input line to either the main exhaust line or to the second cross-over line; andwherein the second valve is operable to direct EGR exhaust from the second input line to either the first cross-over line or to the EGR loop.2. The valve system of claim 1 , wherein EGR loop has a bypass line to the main exhaust line and the connection of the first input line to the main exhaust line is via by-pass line.3. The valve system of claim 1 , wherein the first valve and the second valve have separate actuators.4. The valve system of claim 1 , wherein the first valve and the second valve are ...

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04-01-2018 дата публикации

Methods and systems for open loop and closed loop control of an exhaust gas recirculation system

Номер: US20180003114A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for estimating exhaust gas recirculation (EGR) flow in an engine including an EGR system. In one example, a method may include operating the EGR system in an open loop feed forward mode based on an intake carbon di oxide sensor output above a threshold engine load and/or when a manifold absolute pressure (MAP) is above a threshold pressure, and operating the EGR system in a closed loop feedback mode based on a differential pressure sensor output when the engine load decreases below the threshold load and/or when the MAP decreases below the threshold pressure.

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03-01-2019 дата публикации

INJECTOR DELIVERY MEASUREMENT WITH LEAKAGE CORRECTION

Номер: US20190003414A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method for operating a combustion engine is provided. A fuel injector is operated to perform a fuel injection, a sequence of pressure signals of the fuel rail pressure during the fuel injection is sampled and filtered and a total pressure difference between a first sample after a top dead center of the fuel pump and before the fuel injection has started and a chosen second sample after the injection and before a next pumping stroke is determined. A linear pressure slope at the second sample and a leakage pressure difference between the first sample and the second sample based on the linear pressure slope is calculated, leading to calculating an injection pressure difference as the difference between total pressure difference and the leakage pressure difference. With this, a value of a fuel quantity injected as a function of the injection pressure difference can be determined, while leakages are compensated. 1. A method of operating an internal combustion engine having a fuel rail in fluid communication with a fuel pump and a fuel injector , the method comprising:operating the fuel injector to perform a fuel injection;sampling a sequence of pressure signals representative of a fuel pressure within the fuel rail during the fuel injection in a crankshaft angular domain;filtering the sequence of pressure signals to reduce signal noise;acquiring a first sample of the filtered pressure signals after a top dead center of the fuel pump and before the fuel injection has started in an injection interval;acquiring a second sample of the filtered pressure signals after the injection and before a next pumping stroke;calculating a total pressure difference between the first sample and the second sample;determining a linear pressure slope at least at the second sample and calculating a leakage pressure difference between the first sample and the second sample based on the linear pressure slope;calculating an injection pressure difference as the difference between total pressure ...

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08-01-2015 дата публикации

Valve apparatus

Номер: US20150007801A1
Принадлежит: Denso Corp

A control device executes a feedback control operation of an electric motor such that a sensed opening degree of a valve approaches a target opening degree, which is set for a time of fully closing the valve. The control device stops the energization of the electric motor after reaching of the sensed opening degree of the valve to an energization stop opening degree, which is set on a valve opening side of a full closing degree of the valve in a valve opening direction of the valve. A return spring urges the valve in a valve closing direction of the valve. The target opening degree is set on a valve closing side of the energization stop opening degree in the valve closing direction.

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12-01-2017 дата публикации

METHOD FOR CALCULATING OXYZEN CONCENTRATION IN COMBUSTION CHAMBER

Номер: US20170009710A1
Автор: Han Seungcheol, LEE JangSu
Принадлежит: HYUNDAI MOTOR COMPANY

Provided is a method for calculating an oxygen concentration in a combustion chamber, including: calculating volume efficiency of the combustion chamber while a variable valve lift is in an on state and the volume efficiency of the combustion chamber and the volume of internal EGR from the volume of the combustion chamber while the variable valve lift is in an off state; and calculating a mass of the internal EGR from the pressure of an exhaust manifold, the temperature of the exhaust manifold, and the volume of the internal EGR. 1. A method for calculating an oxygen concentration in a combustion chamber , the method comprising:calculating a volume efficiency of the combustion chamber while a variable valve lift is in an on state and calculating the volume efficiency of the combustion chamber and a volume of an internal EGR from a volume of the combustion chamber while the variable valve lift is in an off state; andcalculating a mass of the internal EGR from a pressure of an exhaust manifold, a temperature of the exhaust manifold, and the volume of the internal EGR.2. The method of claim 1 , wherein:while the variable valve lift is in the on state, the volume efficiency of the combustion chamber is modeled from an engine speed, a pressure of an intake manifold, and a difference in pressure between the intake manifold and the exhaust manifold.3. The method of claim 1 , wherein:while the variable valve lift is in the off state, the volume efficiency of the combustion chamber is modeled from at least one of an engine speed, a fuel amount injected into the combustion chamber, and a pressure of an intake manifold.4. The method of claim 1 , wherein:the mass of the internal EGR is calculated from the volume of the internal EGR, the temperature of the exhaust manifold, and the pressure of the exhaust manifold.5. The method of claim 4 , wherein:the mass of the internal EGR is calculated from an equation of Pa*V/(R*Te),where, Pa represents the pressure of the exhaust manifold ...

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14-01-2021 дата публикации

VEHICLE ENGINE

Номер: US20210010445A1
Принадлежит: MAZDA MOTOR CORPORATION

An engine () includes: an exhaust purification system () housing a GPF device () for purifying exhaust gas; and an EGR passage () connected to a portion of the exhaust purification system located downstream of the GPF device, and the engine is mounted in an engine compartment (R) defined in a front portion of a vehicle body. The exhaust purification system is located forward of a dash panel () constituting the engine compartment, and is positioned to extend toward a tunnel portion (T) of the dash panel. An upstream end portion () of the EGR passage is connected to a lower portion of the exhaust purification system in a vertical direction of the vehicle.

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14-01-2021 дата публикации

EGR GAS DISTRIBUTOR

Номер: US20210010446A1
Принадлежит: AISAN KOGYO KABUSHIKI KAISHA

An EGR gas distributor includes a gas chamber, a gas inflow passage to introduce EGR gas on its upstream side, gas outflow passages to discharge the EGR gas to branch pipes on their downstream side. An inner wall on a downstream side of the gas chamber is divided into downstream-side divided walls corresponding to the respective gas outflow passages, and the downstream-side divided walls are curved or slanted to be of protrusion-like shape protruding toward the corresponding gas outflow passages. Downstream-side dividing ridges are provided each between the adjacent downstream-side divided walls. An inner wall on the upstream side of the gas chamber is placed to face the downstream-side inner wall and provided with at least one upstream-side ridge protruding toward the downstream-side divided walls in each area corresponding to the downstream-side divided walls. 1. An EGR gas distributor configured to distribute EGR gas to each of a plurality of branch pipes configuring an intake manifold , a gas chamber in which the EGR gas is collected;', 'a gas inflow passage configured to introduce the EGR gas into the gas chamber on an upstream side of the gas chamber;', 'a plurality of gas outflow passages configured to discharge the EGR gas residing in the gas chamber to a plurality of the branch pipes on a downstream side of the gas chamber; and', 'an inner wall on the downstream side of the gas chamber being divided into a plurality of downstream-side divided walls each of which corresponds to each of a plurality of the gas outflow passages and each of which is curved or slanted to be of protrusion-like shape protruding toward an inlet of the corresponding gas outflow passage, and a downstream-side dividing ridge as a boundary provided between the adjacent downstream-side divided walls, wherein, 'the EGR gas distributor comprisingan inner wall on the upstream side of the gas chamber is placed to face the inner wall on the downstream side and is provided with at least one ...

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10-01-2019 дата публикации

METHODS AND SYSTEMS FOR DIAGNOSING AN ENGINE INTAKE HUMIDITY SENSOR

Номер: US20190010885A1
Автор: Dudar Aed M.
Принадлежит:

Methods and systems are provided for a diagnostic of a humidity sensor positioned in an intake of an engine and adjusting engine operation responsive to findings of the diagnostic. In one example, the method may include sealing a vehicle exhaust system of an engine, combusting fuel at cylinders of the engine while flowing gases through the engine in a first direction, and then, flowing the combusted exhaust gases through the engine in a reverse, second direction to the humidity sensor positioned in the intake. The method may further include indicating degradation of the humidity sensor based on the output of the humidity sensor while flowing gases in the first and second directions. 1. A method for an engine , comprising: combusting fuel at cylinders of the engine while flowing gases through the engine in a first direction;', 'switching to flowing gases through the engine in an opposite, second direction while not combusting fuel;', 'during the flowing gases in the second direction, obtaining an output of a humidity sensor positioned in an engine intake; and', 'indicating degradation of the humidity sensor based on the output., 'after an engine-off duration2. The method of claim 1 , further comprising claim 1 , in response to indicating degradation of the humidity sensor claim 1 , adjusting engine operation responsive to an alternate humidity estimate and not based on the output of the humidity sensor.3. The method of claim 2 , wherein adjusting engine operation includes adjusting an exhaust gas recirculation (EGR) flow based on the alternate humidity estimate and not based on the output of the humidity sensor.4. The method of claim 1 , wherein flowing gases through the engine in the first direction includes flowing combustion gases generated while combusting fuel from the cylinders to an exhaust passage via rotating the engine in a forward direction and wherein flowing gases through the engine in the second direction includes flowing the combustion gases from the ...

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19-01-2017 дата публикации

WORKING VEHICLE

Номер: US20170015326A1
Принадлежит:

A working vehicle includes an engine, a pair of right and left traveling portions rotated by a power of the engine, a pair of right and left brake operation devices for respectively operating to brake the traveling portions, an engine controller which controls driving of the engine, and a control mode selection switch which can alternatively select the isochronous control and the droop control. The engine controller selects any of an isochronous control and a droop control so as to control the engine. In the case that the isochronous control is designated by the control mode selection switch, the engine is controlled according to the isochronous control when one of the right and left brake operation devices is under a non-operation state, and the engine is controlled according to the droop control when both of the right and left brake operation devices are under an operation state. 1. A working vehicle comprising:an engine which is mounted to a travel machine body;a pair of right and left traveling portions which are rotated by a power of the engine;a pair of right and left brake operation devices for respectively operating to brake the pair of right and left traveling portions;an engine controller which controls driving of the engine; andthe engine controller selecting any of an isochronous control and a droop control so as to control the engine,wherein the working vehicle has a control mode selection switch which can alternatively select the isochronous control and the droop control, andwherein in the case that the isochronous control is designated by the control mode selection switch, the engine is controlled according to the isochronous control when one of the right and left brake operation devices is under a non-operation state, and the engine is controlled according to the droop control when both of the right and left brake operation devices are under an operation state.2. The working vehicle according to claim 1 ,wherein the engine controller stores a ...

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03-02-2022 дата публикации

METHOD FOR OPERATING AN ENGINE

Номер: US20220034284A1
Автор: Klingbeil Adam Edgar
Принадлежит:

Systems and methods for controlling fuel factions delivered to different cylinders are provided. In one example, a controller is configured to, during a single engine cycle and responsive to a first condition, deliver a lower fraction of a first fuel into a donor cylinder in comparison to a fraction of the first fuel being injected into a non-donor cylinder and deliver a higher fraction of a second fuel into the donor cylinder in comparison to a fraction of the second fuel being injected into the non-donor cylinder. 1. A system for a vehicle , comprising:a controller configured to, during a single engine cycle and responsive to a first condition, deliver a lower fraction of a first fuel into a donor cylinder of an engine of the vehicle in comparison to a fraction of the first fuel being injected into a non-donor cylinder of the engine and deliver a higher fraction of a second fuel into the donor cylinder in comparison to a fraction of the second fuel being injected into the non-donor cylinder.2. The system of claim 1 , wherein the first fuel is gaseous fuel and the second fuel is liquid fuel.3. The system of claim 1 , wherein the first or second fuel is ammonia.4. The system of claim 1 , wherein the first or second fuel is hydrogen.5. The system of claim 1 , wherein the first condition includes high engine load and/or high ambient temperature conditions.6. The system of claim 1 , wherein the first condition includes a transient acceleration condition.7. The system of claim 1 , wherein a commanded power output of the donor cylinder is the same as a commanded power output of the non-donor cylinder during the single engine cycle.8. The system of claim 1 , wherein the engine includes an exhaust channel extending from the donor cylinder to an intake manifold for recirculating an exhaust emission in an exhaust gas recirculation (EGR) loop from the donor cylinder to both the donor cylinder and the non-donor cylinder via the intake manifold.9. The system of claim 1 , ...

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19-01-2017 дата публикации

APPARATUS AND METHOD FOR CONTROLLING OPERATION OF ENGINE OF VEHICLE

Номер: US20170016410A1
Принадлежит:

An engine operation control apparatus and engine operation control method of a vehicle are provided. The engine operation control apparatus includes a coolant temperature sensor that detects a coolant temperature of a coolant line which passes through an engine. Further, the apparatus includes first and second maps in which corresponding engine operating points are mapped to a vehicle speed, a gear stage, a driver requesting torque, and an electric field load amount of the vehicle. A controller determines a candidate operating point using any one of the first and second maps based on a comparison between the coolant temperature and a predetermined threshold value and determines an optimal operating point of the engine using the candidate operating point. 1. An engine operation control apparatus of a vehicle , comprising:a coolant temperature sensor configured to detect a coolant temperature of a coolant line which passes through an engine;first and second maps in which corresponding engine operating points are mapped to a vehicle speed, a gear stage, a driver requesting torque, and an electric field load amount of the vehicle; anda controller configured to determine a candidate operating point using any one of the first and second maps based on comparison of the coolant temperature and a predetermined threshold value and configured to determine an optimal operating point of the engine using the candidate operating point.2. The engine operation control apparatus of claim 1 , wherein the first map is a map set based on an engine efficiency when an operating temperature of the engine is included in a first area claim 1 , and the second map is a map set based on an engine efficiency when an operating temperature of the engine is included in a second area which is lower than the first area.3. The engine operation control apparatus of claim 2 , wherein when the coolant temperature is greater than the threshold value claim 2 , the controller is configured to determine the ...

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17-04-2014 дата публикации

Condensate accumulation model for an engine heat exchanger

Номер: US20140102428A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Embodiments for controlling condensate in an engine heat exchanger are disclosed. In one example, a method for an engine comprises increasing exhaust gas recirculation (EGR) flow responsive to condensation in an EGR cooler. In this way, condensate in the EGR cooler may be controlled via modulation of EGR flow.

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17-01-2019 дата публикации

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

Номер: US20190017454A1
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A control apparatus for an internal combustion engine according to the invention is applied to an internal combustion engine in which EGR gas and condensed water generated by an EGR cooler are supplied into a cylinder. The control apparatus calculates an equivalence ratio of the internal combustion engine, and controls an EGR valve and a condensed water supply valve such that, when the equivalence ratio is high, a supply rate of the condensed water increases and a supply rate of the EGR gas decreases relative to when the equivalence ratio is low. 15-. (canceled)6. A control apparatus for an internal combustion engine configured to inject fuel into a cylinder , the internal combustion engine includingan EGR apparatus configured to supply a part of exhaust gas into the cylinder as EGR gas, andcomponent proportion modifying means configured to modify proportions of water and carbon dioxide in the EGR gas, the control apparatus comprising an electronic control unit configured to(i) calculate an equivalence ratio of the internal combustion engine, and(ii) control the component proportion modifying means such that, when the equivalence ratio is high, a proportion of water in the EGR gas increases and a proportion of carbon dioxide in the EGR gas decreases relative to when the equivalence ratio is low.7. The control apparatus according to claim 6 , whereinthe electronic control unit is configured to calculate the equivalence ratio on the basis of an operating condition of the internal combustion engine.8. The control apparatus according to claim 6 , whereinthe electronic control unit is configured to control the component proportion modifying means such that the proportion of carbon dioxide in the EGR gas in a case where the equivalence ratio is lower than a predetermined value becomes lower before warm-up of the internal combustion engine is complete than after warm-up of the internal combustion engine is complete.9. The control apparatus according to claim 6 , wherein ...

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16-01-2020 дата публикации

METHOD FOR MONITORING LEAKAGE OF EXHAUST GAS RECIRCULATION SYSTEM FOR ENGINE

Номер: US20200018269A1
Автор: KOO Bon Chang
Принадлежит:

A method for monitoring leakage of an exhaust gas recirculation system for an engine of a vehicle includes: determining, by a controller, whether the engine is in an idle state in which the exhaust gas recirculation system is not operated; determining, by the controller, whether small flow leakage of the exhaust gas recirculation system occurs based on a predicted pressure of gas sucked into an intake manifold connected to the engine and a measured pressure of gas sucked into the intake manifold when the engine is in the idle state; and determining, by the controller, that leakage of the exhaust gas recirculation system occurs when the measured pressure is greater than the predicted pressure. 1. A method for monitoring leakage of an exhaust gas recirculation system for an engine of a vehicle , the method comprising steps of:determining, by a controller, whether the engine is in an idle state in which the exhaust gas recirculation system is not operated;determining, by the controller, whether leakage of the exhaust gas recirculation system occurs based on a predicted pressure of gas sucked into an intake manifold connected to the engine and a measured pressure of gas sucked into the intake manifold when the engine is in the idle state; anddetermining, by the controller, that leakage of the exhaust gas recirculation system occurs when the measured pressure is greater than the predicted pressure.2. The method of claim 1 , further comprising a step of:when it is determined that leakage of the exhaust gas recirculation system occurs, determining, by the controller, finally that leakage of the exhaust gas recirculation system occurs based on a measured pressure of gas sucked into the intake manifold according to an opening angle of an exhaust gas recirculation system valve, a measured pressure of gas sucked into the intake manifold according to closing of the exhaust gas recirculation system valve after the exhaust gas recirculation system valve is operated at the opening ...

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26-01-2017 дата публикации

METHOD AND DEVICE FOR THE DYNAMIC MONITORING OF AN AIR FILLING SYSTEM OF AN INTERNAL COMBUSTION ENGINE

Номер: US20170022942A1
Принадлежит:

A method and a device for the dynamic monitoring of an air charging system of an internal combustion engine, subsystems of the air charging system having a low-pass characteristic, and a characteristic state quantity that is to be measured being compared with a modeled, identical state quantity. The measured signal and the modeled signal are filtered using a high-pass filter or bandpass filter, and, given a change in the characteristic state quantity that is to be measured, higher-frequency signal portions are evaluated, which is advantageous with regard to the recognition of so-called slow response errors. 110-. (canceled)11. A method for dynamically monitoring an air charging system of an internal combustion engine , subsystems of the air charging system having a low-pass characteristic as a function of geometry , measurement design , aging , or contamination , the method comprising:performing, for a change in a characteristic state quantity that is to be measured, a dynamic diagnosis by comparison of a modeled signal and a measured signal, the measured signal being an actual value of the characteristic state quantity that can be measured directly or calculated from measurement values of other quantities, and the modeled signal being a model value of the characteristic state quantity; andfiltering the measured signal and the modeled signal with one of a high-pass filter and a bandpass filter; andevaluating, given a change in the characteristic state quantity that is to be measured, higher-frequency signal portions.12. The method of claim 11 , wherein the higher-frequency signal portions of the measured signal claim 11 , or of the signal calculable from measurement values of other quantities claim 11 , are compared with correspondingly filtered and modeled signals claim 11 , and the dynamic characteristic of the subsystems of the air charging system is inferred based on the comparison.13. The method of claim 11 , wherein both the higher-frequency signal portions of ...

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24-01-2019 дата публикации

Internal combustion engine control apparatus

Номер: US20190024600A1
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

Fuel injection control of an internal combustion engine requires an optimized fuel amount that can be burned completely with oxygen in intake air to be supplied, but the oxygen concentration in the atmospheric air is affected by humidity. By separately calculating a dry air flow rate that directly affects the oxygen amount and a humidity flow rate that is a change factor of the oxygen concentration in the intake air of the internal combustion engine, the fuel can be supplied to the cylinder of the internal combustion engine at an optimized air-fuel ratio. In addition, highly precise control involving EGR for flowback of a part of the exhaust gas flowing in the exhaust pipe to the intake pipe can also be achieved.

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23-01-2020 дата публикации

Intake manifold with integrated mixer

Номер: US20200025159A1
Автор: Craig W. Lohmann
Принадлежит: Deere and Co

A manifold for use with an internal combustion engine defining at least one cylinder and an EGR circuit, the manifold including a first chamber having an inlet and an outlet, where the outlet is open to the cylinder, and a second chamber having a first port open to the first chamber, a second port open to the first chamber downstream of the first port, and a third port open to the EGR circuit.

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23-01-2020 дата публикации

OPPOSED-PISTON ENGINE IN A LIGHT-DUTY TRUCK

Номер: US20200025161A1
Принадлежит: Achates Power, Inc.

An opposed-piston engine is configured to fit in an engine compartment of a light-duty truck without compromising engine operations or the integrity of the engine compartment. The opposed-piston engine includes an air handling system and can be configured so that a cylinder assembly of the engine is tilted. The tilt of the cylinder assembly can allow for all of the components of the engine's air handling system to be located on one side of the opposed-piston engine. The air handling system of the opposed-piston engine can be configured with a cobra-head shaped intake duct assembly. 1. A vehicle , comprising:a chassis with spaced-apart frame rails running in a longitudinal direction of the chassis, between front and rear ends of the truck;an engine compartment comprising and bounded by a hood, a firewall, and at least one cowl panel;an opposed-piston engine supported on the frame rails and fitted in the engine compartment; a cylinder assembly with a longitudinal axis that is offset from a vertical plane of the engine by an angle;', 'two crankshafts positioned at respective exhaust end and intake end of the cylinder assembly; and', 'an air handling system that comprises an EGR loop., 'the opposed-piston engine comprising2. The vehicle of claim 1 , in which the vehicle either is a light-duty truck or has a maximum gross vehicle weight rating of 8 claim 1 ,500 pounds.3. The vehicle of claim 1 , in which the air handling system comprises an intake duct assembly configured for delivering air to a compressor of the air handling system claim 1 , a portion of the intake duct assembly being located near the firewall.4. The vehicle of claim 3 , in which the intake duct assembly comprises a compressor inlet conduit that includes a tubular portion with a circular cross-section and flattened portion claim 3 , the flattened portion including an opening configured to receive a flexible fitting to connect the opening on the flattened portion to an inlet of the compressor.5. The ...

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02-02-2017 дата публикации

METHOD FOR PROCESSING SENSOR SIGNALS

Номер: US20170030277A1
Принадлежит:

A method for processing sensor signals in a control unit of a motor vehicle and a control unit for carrying out the method. The control unit is provided for the open-loop and/or closed-loop control of a system and acquires signals from this system. The system is modeled with the aid of a model, at least one value being ascertained for a slow signal based on the model. 1. A method for processing sensor signals in a control unit of a motor vehicle , the control unit being provided for open-loop and/or closed-loop control of a system , the method comprising:acquiring signals from the system, of which at least one signal is classified as slow signal and at least one signal is classified as fast signal;ascertaining at least one value for the at least one slow signal based on a model of the system.2. The method as recited in claim 1 , wherein a time characteristic of the at least one slow signal is ascertained.3. The method as recited in claim 1 , wherein the system is modeled with a system model.4. The method as recited in claim 1 , wherein the system is modeled dynamically with at least one of the at least one fast signals and at least one input quantity into the system.5. The method as recited in claim 1 , further comprising:adapting the model based on measured values in order to correct an observational error.6. The method as recited in claim 1 , further comprising:at least one of controlling and regulating an exhaust gas recirculation in a combustion engine using the method.7. The method as recited in claim 6 , wherein the method is used in conjunction with a cylinder-charge control.8. The method as recited in claim 1 , wherein a controller signal is utilized as the fast signal.9. The method as recited in claim 8 , wherein a signal relating to at least one of a pressure-sensor value and a mass-flow value claim 8 , is utilized as the slow signal.10. A control unit for the open-loop and/or closed-loop control of a system claim 8 , the control unit configured to acquire ...

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02-02-2017 дата публикации

METHOD AND SYSTEM FOR PREDICTIVE EMISSION MAINTENANCE OF AN ENGINE

Номер: US20170030307A1
Автор: Lucht Erich A.
Принадлежит:

Methods and systems for predictive emission maintenance of an engine. In one embodiment, a method for predictive emission maintenance of an engine is provided. The method can include a controller obtaining operational status information of the engine upon startup of a transport refrigeration unit (TRU) or a TRU generator set (GenSet). The method also includes the controller predicting engine emission maintenance based on the operational status information. Also, the method includes the controller providing an advanced notification warning based on whether the controller predicts engine emission maintenance. 1. A method for predictive emission maintenance of a common rail diesel engine having an emissions reduction system that includes an exhaust gas recirculation (EGR) valve component , the method comprising:a controller obtaining an initial valve position of a valve of the EGR valve component with respect to a seat of the EGR valve component upon startup of a transport refrigeration unit (TRU) or a TRU generator set (GenSet);the controller predicting engine emission maintenance based on the initial valve position of the valve of the EGR valve component;the controller providing an advanced notification warning based on whether the controller predicts engine emission maintenance.2. The method of claim 1 , further comprising the controller evaluating a rate of change of the initial valve position of the valve of the EGR valve component over a time period from when maintenance and/or cleaning of the common rail diesel engine was last completed up through the controller obtaining the initial valve position of the valve.3. The method of claim 2 , wherein the controller predicting engine emission maintenance based on the initial valve position of the valve of the EGR valve component includes comparing the rate of change of the initial valve position to a rate of change threshold.4. The method of claim 3 , wherein the rate of change threshold is determined based on at ...

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17-02-2022 дата публикации

ENGINE

Номер: US20220049663A1
Автор: Kishiura Masato, Matsui Yu
Принадлежит: YANMAR POWER TECHNOLOGY CO., LTD.

An engine includes an exhaust manifold, an intake manifold, and an EGR device configured to supply EGR gas from the exhaust manifold to the intake manifold. An EGR cooler is provided at a side of the exhaust manifold, and a longitudinal direction of the EGR cooler is in an up-down direction of the engine in a used state. 1. An engine , comprising:an exhaust manifold, an intake manifold, and an EGR device configured to supply EGR gas from the exhaust manifold to the intake manifold,wherein an EGR cooler is provided at a side of the exhaust manifold, and a longitudinal direction of the EGR cooler is in an up-down direction of the engine in a used state.2. The engine according to claim 1 , wherein the EGR cooler is provided under the exhaust manifold.3. The engine according to claim 1 , wherein an upper end of the EGR cooler has a supply port into which the EGR gas is supplied and a discharge port from which the EGR gas is discharged.4. The engine according to claim 1 , the engine further comprises a cylinder head claim 1 , wherein the exhaust manifold has an EGR pipe claim 1 , the EGR pipe is extended from the EGR cooler to the intake manifold and partially formed inside the cylinder head.5. The engine according to claim 1 , wherein an attachment part of the exhaust manifold is provided between the EGR cooler and the exhaust manifold. This application is a Continuation under 35 U.S.C. § 120 of U.S. patent application Ser. No. 16/762,553, filed Nov. 20, 2018, which was a national phase entry under 35 U.S.C. § 371 of PCT Patent Application No. PCT/JP2018/042,767, filed on Nov. 20, 2018, which claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2017-241707, filed Dec. 18, 2017, the entireties of which are incorporated by reference.The present invention relates to an engine including an EGR device.There has been known an engine including an EGR device which recirculates part of exhaust gas to intake air. The EGR device lowers combustion temperature by ...

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31-01-2019 дата публикации

SYSTEMS AND METHODS FOR EQUALIZING BACKPRESSURE IN ENGINE CYLINDERS

Номер: US20190032536A1
Принадлежит: Cummins Inc.

An exhaust manifold comprises a plurality of exhaust intake conduits structured to be fluidly coupled to an engine and receive exhaust gas from a corresponding cylinder of the engine. At least one exhaust intake conduit provides a reduction in an exhaust intake conduit cross-sectional area from an inlet to an outlet. A plurality of bends are each defined by a respective one of the exhaust intake conduit outlets. An exhaust intake manifold is fluidly coupled to the exhaust intake manifold and defines an exhaust intake manifold flow axis. Each of the plurality of bends is shaped so as to define an angle of approach of exhaust gas flowing therethrough. A first angle of approach of the first bend relative to the exhaust intake manifold flow axis is smaller than a second angle of approach of an inner second bend. 1. An exhaust manifold , comprising:a plurality of exhaust intake conduits, each of the plurality of exhaust intake conduits structured to be fluidly coupled to an engine and structured to receive exhaust gas from a corresponding cylinder of the engine, at least one the plurality of exhaust intake conduits providing a reduction in an exhaust intake conduit cross-sectional area of the respective exhaust intake conduit from an exhaust intake conduit inlet to an exhaust intake conduit outlet of the respective exhaust intake conduit;a plurality of bends, each of the plurality of bends defined by a respective one of the exhaust intake conduit outlets; andan exhaust intake manifold fluidly coupled to the exhaust intake conduit outlet of at least one of the plurality of exhaust intake conduits, the exhaust intake manifold defining an exhaust intake manifold flow axis,wherein each of the plurality of bends is shaped so as to define an angle of approach of exhaust gas flowing through the respective exhaust intake conduit outlet, a first angle of approach of the first bend relative to the exhaust intake manifold flow axis being smaller than a second angle of approach of a ...

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31-01-2019 дата публикации

SYSTEMS AND METHODS FOR IDENTIFYING A STUCK OPEN EXHAUST GAS RECIRCULATION VALVE

Номер: US20190032590A1
Автор: Conis Peter
Принадлежит:

Methods and systems are provided for determining whether an exhaust gas recirculation (EGR) valve is degraded and being held open in a vehicle system. In one example, a method may include, in response to an engine pull-down request, closing a throttle coupled to an intake manifold of the engine, closing the EGR valve, propelling the vehicle via an electric motor, and checking operation of the EGR valve based on both intake manifold pressure and exhaust pressure. For example, if the intake manifold pressure does not decrease by a threshold amount relative to the exhaust pressure, EGR valve degradation may be indicated. 1. A method , comprising:propelling a vehicle by an engine having a throttle coupled to an intake manifold;recirculating a portion of engine exhaust to the intake manifold through an exhaust gas recirculation (EGR) valve; andchecking operation of the EGR valve, based on both intake manifold pressure and exhaust pressure, after closing the throttle and the EGR valve when propelling the vehicle with an electric motor while the engine spins down to rest.2. The method of claim 1 , wherein the checking operation of the EGR valve commences after the vehicle transitions from being propelled by the engine to being propelled by the electric motor and concludes when the engine is at rest.3. The method of claim 2 , further comprising shutting off fuel supplied to the engine during the checking operation of the EGR valve.4. The method of claim 1 , wherein the EGR valve is not coupled to a position sensor.5. The method of claim 1 , wherein the EGR valve is positioned by a stepper motor.6. The method of claim 1 , wherein the checking operation of the EGR valve includes one or more of determining a difference between the intake manifold pressure and the exhaust pressure and determining a ratio of the intake manifold pressure to the exhaust pressure.7. The method of claim 6 , further comprising:in response to one or more of the difference between the intake manifold ...

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30-01-2020 дата публикации

CONTROL SYSTEM FOR COMPRESSION IGNITION ENGINE

Номер: US20200032728A1
Принадлежит:

A control system for a compression ignition engine includes a combustion chamber, a throttle valve, an injector, an ignition plug, an EGR system, a sensor device and a controller. The controller includes a first mode module, a second mode module and a changing module configured to change an engine mode from a first mode to a second mode in response to a change demand. The changing module outputs signals to the throttle valve and the injector in response to the demand so that an air-fuel ratio of mixture gas becomes a stoichiometric air-fuel ratio or a substantially stoichiometric air-fuel ratio, and outputs a signal to the EGR system so that an EGR gas amount decreases more than before the demand, and when the EGR gas amount is determined to be decreased to a given amount, the changing module permits that the second mode module starts the second mode. 1. A control system for a compression ignition engine , comprising:a combustion chamber of the engine defined by a cylinder, a piston configured to reciprocate inside the cylinder, and a cylinder head closing one end of the cylinder;a throttle valve configured to adjust an amount of air delivered to the combustion chamber;an injector attached to the cylinder head and configured to inject fuel to be supplied into the combustion chamber;an ignition plug disposed so as to be oriented into the combustion chamber and configured to ignite mixture gas inside the combustion chamber;an EGR system configured to introduce EGR gas into the combustion chamber;a sensor device configured to measure a parameter related to operation of the engine; anda controller having a circuitry connected with the throttle valve, the injector, the ignition plug, the EGR system, and the sensor device, configured to perform a calculation in response to a measurement signal from the sensor device and output signals to the throttle valve, the injector, the ignition plug, and the EGR system,wherein the controller includes a first mode module configured ...

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12-02-2015 дата публикации

Method of monitoring egr system

Номер: US20150040862A1
Автор: Ha Dong Bong
Принадлежит: Hyundai Motor Co

A method of monitoring an EGR system includes setting up an ignition timing map depending on EGR efficiency when the EGR system operates normally. An output value reflecting the driving state of a vehicle is divided into an active area and an inactive area. A detected value of ignition timing depending on the occurrence of knocking for the active and inactive areas is learned and stored. When knocking occurs in the active area, a corrected value of ignition timing influenced by only the operation of the EGR system is extracted using the difference between the detected values of ignition timing learned in the active and inactive areas. The amount of variation in the EGR efficiency influenced by the operation of the EGR system is measured by measuring the EGR efficiency by applying the corrected value of ignition timing to the ignition timing map.

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09-02-2017 дата публикации

LOW PRESSURE EGR CONTROL USING THROTTLING

Номер: US20170037797A1
Принадлежит:

A number of variations may include a method including controlling low pressure EGR flow rates using air intake throttle with a variable swirl device or throttle valve, or using exhaust throttling. 1. A method comprising:providing a computer/controller constructed and arranged to receive one or more inputs regarding operating conditions of the vehicle or constructed and arranged to generate an input based upon at least one of calculations, look-up tables, or models;and utilizing the computer/controller and at least one input from sources external to the computer/controller or an input from the computer/controller to make a first determination as to whether enough exhaust gas is flowing through a low pressure exhaust gas recirculation conduit of a vehicle system, and if there is not enough exhaust gas flowing through a low pressure exhaust gas recirculation conduit of a vehicle system making a second determination as to whether a low pressure exhaust gas recirculation valve is completely open, and in response to at least one of the first determination or second determination, the computer/controller generating at least one output constructed and arranged to alter the amount of exhaust gas flowing through the low pressure exhaust gas recirculation conduit.2. A method as set forth in wherein the generating at least one output results in movement of the low pressure exhaust gas recirculation valve.3. A method as set forth in wherein if the computer/controller determines that there is not enough exhaust gas flowing through the low pressure exhaust gas recirculation conduit to meet a desired engine operating condition claim 1 , the generating at least one output results in the low pressure EGR valve being moved to a completely open position.4. A method as set forth in further comprising using the computer/controller to determine if the low pressure exhaust gas recirculation valve is in a completely open position claim 1 , and if the low pressure exhaust gas recirculation ...

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09-02-2017 дата публикации

SYSTEM AND METHOD FOR DETERMINING LOCATION AND VALUE OF PEAK FIRING PRESSURE

Номер: US20170037798A1
Принадлежит:

A system includes a combustion engine having an intake manifold and an exhaust manifold, an exhaust gas recirculation (EGR) system coupled to the combustion engine and configured to route exhaust generated by the combustion engine from the exhaust manifold to the intake manifold, and a first knock sensor coupled to the combustion engine and configured to measure vibrations of the combustion engine and output a first vibration signal. The system also includes a controller communicatively coupled to the combustion engine, the knock sensor, the EGR system, or any combination thereof. The controller is configured to determine a peak firing pressure (PFP) within the combustion engine and control operations of both the combustion engine and the EGR system based on the PFP. 1. A system , comprising:a combustion engine comprising an intake manifold and an exhaust manifold;an exhaust gas recirculation (EGR) system coupled to the combustion engine and configured to route exhaust generated by the combustion engine from the exhaust manifold to the intake manifold;a first knock sensor coupled to the combustion engine and configured to measure vibrations of the combustion engine and output a first vibration signal; anda controller communicatively coupled to the combustion engine, the knock sensor, the EGR system, wherein the controller is configured to determine a location of peak firing pressure (PFP) or a value of absolute pressure within the combustion engine based on the first vibration signal, and control operations of both the combustion engine and the EGR system based on the PFP or the absolute pressure value.2. The system of claim 1 , comprising a second knock sensor coupled to the combustion engine configured to measure the vibrations of the combustion engine and output a second vibration signal.3. The system of claim 2 , wherein the first knock sensor is coupled proximate to a first cylinder of the combustion engine claim 2 , and the second knock sensor is coupled ...

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09-02-2017 дата публикации

METHOD AND SYSTEMS FOR EXHAUST GAS RECIRCULATION

Номер: US20170037817A1
Принадлежит:

Various methods and systems are provided for reducing cylinder-to-cylinder variation in exhaust gas recirculation. In one embodiment, a system comprises a first cylinder group of an engine having a first number of cylinders, a second cylinder group of the engine having a second number of cylinders that is not an integer multiple of the first number of cylinders, and an exhaust system coupled to the first cylinder group and the second cylinder group. In at least one mode of operation, the exhaust system has exhaust ports of the first cylinder group fluidly coupled to an intake of the engine and exhaust ports of the second cylinder group fluidly decoupled from the intake. 1. A system , comprising:a first cylinder group of an engine having a first number of cylinders;a second cylinder group of the engine having a second number of cylinders that is not an integer multiple of the first number of cylinders; andan exhaust system coupled to the first cylinder group and the second cylinder group, and in at least one mode of operation the exhaust system has exhaust ports of the first cylinder group fluidly coupled to an intake of the engine and exhaust ports of the second cylinder group fluidly decoupled from the intake.2. The system of claim 1 , further comprising a damping volume positioned in the intake claim 1 , the damping volume comprising an expansion region to collect charge air prior to distributing the charge air to the engine claim 1 , the charge air comprising one or more of intake air or exhaust gas from the first cylinder group.3. The system of claim 1 , wherein the first number of cylinders is three cylinders claim 1 , and wherein the second number of cylinders is five cylinders.4. The system of claim 1 , wherein the exhaust system comprises a first exhaust manifold coupled to the first cylinder group and a second exhaust manifold coupled to the second cylinder group claim 1 , the first exhaust manifold fluidically coupled to the intake and the second exhaust ...

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08-02-2018 дата публикации

ENGINE SYSTEM HAVING EXHAUST GAS RECIRCULATION APPARATUS

Номер: US20180038296A1
Автор: CHOI Choo Saeng
Принадлежит:

An engine system having an exhaust gas recirculation (EGR) apparatus includes: an engine including a plurality of combustion chambers; an intake line through which an intake gas supplied to the combustion chambers flows; an exhaust line in which an exhaust gas discharged from the combustion chambers flows; and a turbocharger including: a turbine disposed at the exhaust line and rotating by the exhaust gas; and a compressor disposed in the intake line and rotating and compressing external air. The EGR apparatus includes a recirculation line branched from the exhaust line; an EGR valve disposed at the recirculation line and adjusting a recirculation gas amount; a pressure sensor disposed at a front end of the EGR valve to measure a pressure of a recirculation gas; and a flow rate adjustment apparatus disposed at a rear end of the EGR valve and adjusting the recirculation gas amount. 1. An engine system having an exhaust gas recirculation (EGR) apparatus , the engine system comprising:an engine comprising a plurality of combustion chambers that generate a driving torque by combustion of fuel;an intake line through which an intake gas supplied to the plurality of combustion chambers flows;an exhaust line in which an exhaust gas discharged from the plurality of combustion chambers flows; anda turbocharger comprising: a turbine disposed at the exhaust line and rotating by the exhaust gas that is discharged from the plurality of combustion chambers; and a compressor, which is disposed in the intake line, rotating by interlocking with the turbine and compressing external air,wherein the EGR apparatus includes: a recirculation line branched from the exhaust line to join the intake line; an EGR valve disposed at the recirculation line and adjusting a recirculation gas amount; a pressure sensor disposed at a front end of the EGR valve of the recirculation line to measure a pressure of a recirculation gas; and a flow rate adjustment apparatus installed at a rear end of the EGR ...

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24-02-2022 дата публикации

Gas engine heat pump and method of operating the same

Номер: US20220056861A1
Принадлежит: LG ELECTRONICS INC

A gas engine heat pump and a method of operating the same are provided. According to an embodiment of the present disclosure, the gas engine heat pump includes: an engine for burning a mixture of air and fuel; an exhaust gas compressor for compressing exhaust gases coming from the engine; a buffer tank for storing the exhaust gases compressed by the exhaust gas compressor; an exhaust gas valve disposed between the buffer tank and an intake manifold of the engine; an exhaust gas spray nozzle for spraying the exhaust gases stored in the buffer tank into a cylinder of the engine; an exhaust gas sensor for acquiring information on the exhaust gases coming from the engine; and a controller, wherein the controller controls the operation of at least one of the exhaust gas valve and the exhaust gas spray nozzle, based on the information on the exhaust gases acquired by the exhaust gas sensor. Other various embodiments are possible.

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24-02-2022 дата публикации

EGR PUMP SYSTEM AND CONTROL METHOD OF EGR PUMP

Номер: US20220056872A1
Принадлежит:

A method of operating exhaust gas recirculation pump for an internal combustion engine including: providing an EGR pump assembly including an electric motor coupled to a roots device having rotors, the EGR pump operably connected to an internal combustion engine; providing an system controller; providing an EGR control unit linked to the EGR pump assembly; sending a speed command from the system controller to the EGR control unit; determining if a motor temperature and module temperature is within a predetermined target; outputting a desired speed signal; determining if a motor speed is within a predetermined target; determining if a motor voltage is within a predetermined target; and outputting a current to the electric motor controlling the speed of the electric motor and regulating an EGR mass flow rate. 1. A method of operating exhaust gas recirculation pump for an internal combustion engine comprising:providing an EGR pump assembly including an electric motor coupled to a roots device having rotors, the EGR pump operably connected to an internal combustion engine;providing a system controller;providing an EGR control unit linked to the EGR pump assembly;sending a speed command from the system controller to the EGR control unit;determining if a motor temperature and module temperature is within a predetermined target;outputting a desired speed signal;determining if a motor speed is within a predetermined target;determining if a motor voltage is within a predetermined target;outputting a current to the electric motor controlling the speed of the electric motor and regulating an EGR mass flow rate.2. The method of operating exhaust gas recirculation pump of wherein the step of determining a motor temperature and module temperature includes determining that the motor temperature and module temperature is less than or greater than a preset warning temperature.3. The method of operating exhaust gas recirculation pump of wherein when the motor temperature or module ...

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07-02-2019 дата публикации

SYSTEMS AND METHODS FOR A SPLIT EXHAUST ENGINE SYSTEM

Номер: US20190040791A1
Принадлежит:

Methods and systems are provided for operating a split exhaust engine system that provides blowthrough air and exhaust gas recirculation (EGR) to an intake passage via a ported scavenge manifold. In one example, the ported scavenge manifold includes a first scavenge manifold coupled to a plurality of exhaust runners and a second scavenge manifold coupled to the plurality of exhaust runners via ports. The location of the ports on the exhaust runners combined with adjustments to a bypass valve coupled between the first scavenge manifold and an exhaust passage and an EGR valve coupled between the second scavenge manifold and the intake passage enables exhaust gas to be preferentially flowed to the exhaust passage and blowthrough air to be preferentially flowed to the intake passage under select operating conditions. 1. A method for an engine , comprising:from a first set of cylinder exhaust valves, flowing a first portion of exhaust gases to an exhaust passage, upstream of a turbocharger turbine; and first, flowing a second portion of exhaust gases to the exhaust passage, downstream of the turbocharger turbine and upstream of a catalyst; and', 'then, flowing blowthrough air to an intake passage, upstream of a turbocharger compressor., 'from a second set of cylinder exhaust valves2. The method of claim 1 , wherein flowing blowthrough air includes flowing a mixture of fresh air and unburnt fuel to the intake passage during a positive valve overlap between opening of each cylinder exhaust valve of the second set of cylinder exhaust valves and a corresponding intake valve.3. The method of claim 1 , wherein flowing the second portion of exhaust gases to the exhaust passage includes flowing the second portion of exhaust gases from the second set of cylinder exhaust valves to a first scavenge manifold via a plurality of exhaust runners claim 1 , each exhaust runner of the plurality of exhaust runners coupled to one cylinder exhaust valve of the second set of cylinder exhaust ...

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07-02-2019 дата публикации

Fuel Injection Valve Control Device

Номер: US20190040814A1
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

A fuel injection valve capable of forming a homogeneous air-fuel mixture in homogeneous combustion at a low engine speed and a control device thereof are provided. According to the present invention, a fluid injection valve that is configured separately from a fuel injection valve and has a function of injecting a fluid is provided and a control device of the fuel injection valve includes a control unit that performs control such that fuel is injected from the fuel injection valve and then controls the fluid injection valve such that the fluid is injected from the fluid injection valve and the fuel injected from the fuel injection valve is stirred.

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07-02-2019 дата публикации

IN-CYLINDER EGR AND VVA FOR AFTERTREATMENT TEMPERATURE CONTROL

Номер: US20190040826A1
Принадлежит: Eaton Intelligent Power Limited

A computer control network is connected to a multiple-cylinder engine and implements aftertreatment temperature management. Processors are configured to determine an aftertreatment temperature-efficient air to fuel ratio that satisfies the sensed power output request, determine an air to fuel ratio adjustment, select an in-cylinder exhaust gas recirculation technique, select at least one EGR cylinder of the multiple-cylinder engine to implement the in-cylinder exhaust gas recirculation technique, and control the intake valves to open and the exhaust valves to close for the selected at least one EGR cylinder to adjust the oxygen and particulate content of the exhaust gas by applying at least a second compression stroke of the respective reciprocating piston of the at least one EGR cylinder to the exhaust gas to push the exhaust gas through to the intake manifold. 1. A system for aftertreatment temperature management in a multiple-cylinder engine , comprising:a multiple-cylinder engine comprising respective reciprocating pistons in multiple cylinders, the respective reciprocating pistons connected to a crankshaft for rotation of the crankshaft, a computer-controllable fuel injection system configured to inject fuel in to the multiple cylinders, and respective computer-controllable intake valves and exhaust valves for opening and closing the multiple cylinders; and sense a power output request for the engine and an aftertreatment temperature;', 'determine an aftertreatment temperature-efficient air to fuel ratio that satisfies the sensed power output request;', 'sense a current air to fuel ratio in one or both of an intake manifold connected to the engine and an exhaust manifold connected to the engine;', 'determine an air to fuel ratio adjustment by processing the determined aftertreatment temperature-efficient air to fuel ratio and by processing the sensed current air to fuel ratio;', 'select an in-cylinder exhaust gas recirculation technique based on the determined ...

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07-02-2019 дата публикации

Systems and methods of controlling pre-primary ignition of an internal combustion engine

Номер: US20190040837A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method of controlling pre-primary ignitions of an internal combustion engine includes accessing data corresponding to an exhaust gas recirculation error and data corresponding to at least one of a rotational speed of the engine, a throttle position of a throttle, and a combustion mode of the engine. A voltage of the electrical power to be applied to an ignition source and a number of pre-primary ignitions to be applied are calculated based on the data corresponding to the exhaust gas recirculation error and the data corresponding to at least one of the rotational speed of the engine, the throttle position, and the combustion mode of the engine.

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19-02-2015 дата публикации

Method for specifying a malfunction of an exhaust gas recirculation system of an internal combustion engine of a motor vehicle and corresponding diagnostic device

Номер: US20150047425A1
Принадлежит: ROBERT BOSCH GMBH

A method for specifying a malfunction of an exhaust gas recirculation system of an internal combustion engine of a motor vehicle, including: setting a first operating point of the engine and a first operating state of the fresh air/exhaust gas system as vehicle conditioning in a first measurement setting; measuring volumetric efficiencies of the engine for the first measurement setting and for at least one additional measurement setting, and comparing the measured volumetric efficiencies with an engine characteristics map stored in a memory unit for volumetric efficiency values of the engine, and ascertaining whether a malfunction is present during the exhaust gas recirculation process based on the comparison; and specifying the malfunction of the exhaust gas recirculation system while taking into account the measuring results for the first measurement setting and for the at least one additional measurement setting and the stored engine characteristics map for volumetric efficiency values.

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18-02-2021 дата публикации

ENGINE SYSTEM

Номер: US20210047990A1
Принадлежит: AISAN KOGYO KABUSHIKI KAISHA

This engine system is provided with a throttle device, an EGR valve, and an ECU. The ECU diagnoses an abnormality of the EGR valve on the basis of an operating state during an engine deceleration, and diagnoses combustion deterioration of an engine on the basis of a crank angle speed change during the engine deceleration (not during a fuel cut-off). The ECU executes an engine stall avoidance control with the throttle device when it is determined there is an abnormality in the EGR valve, makes a final determination that the EGR valve has an abnormality and continues the engine stall avoidance control when it is determined thereafter that there is combustion deterioration, and makes a final determination that the EGR valve is normal and cancels the engine stall avoidance control when it is determined that there is no combustion deterioration. 1. An engine system comprising:an engine;an intake passage configured to introduce intake air into the engine;an exhaust passage configured to discharge exhaust gas from the engine;a fuel supply unit configured to supply fuel to the engine;an exhaust gas recirculation device including:an exhaust gas recirculation passage configured to allow part of the exhaust gas discharged from the engine to the exhaust passage to flow as an exhaust recirculation gas into the intake passage to recirculate into the engine; andan exhaust gas recirculation valve configured to regulate a flow rate of the exhaust recirculation gas in the exhaust gas recirculation passage,the exhaust gas recirculation valve including a valve seat and a valve element provided to be capable of seating on the valve seat;an output adjusting unit configured to adjust output of the engine;an operating-state detecting unit configured to detect an operating state of the engine; anda controller configured to control at least the fuel supply unit, the exhaust gas recirculation valve, and the output adjusting unit based on the detected operating state of the engine,wherein, ...

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18-02-2016 дата публикации

Thermal abatement systems

Номер: US20160047340A1
Принадлежит: Eaton Corp

A thermal abatement system comprises an axial inlet, radial outlet supercharger. A main case comprises at least two rotor bores, an inlet plane and an outlet plane. The inlet plane is perpendicular to the outlet plane. An inlet wall comprises an inner surface. Two rotor mounting recesses are in the inner surface, and the inlet wall is parallel to the inlet plane. An outlet is in the outlet plane. An inlet is in the inlet plane. At least two rotors are configured to move air from the inlet to the outlet. The main case comprises at least two backflow ports. An intercooler is connected to receive air expelled from the supercharger, to cool the received air, and to expel the cooled air to the at least two back flow ports.

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26-02-2015 дата публикации

Learning of egr valve lift and egr valve flow transfer function

Номер: US20150053186A1
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for improving accuracy of delta pressure over valve (DPOV) based EGR flow measurement during low valve lift conditions by learning errors in EGR valve lift and/or EGR valve flow transfer function.

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22-02-2018 дата публикации

COMPRESSOR SYSTEM FOR A MOTOR VEHICLE

Номер: US20180051659A1
Автор: DIETRICH Konstantin
Принадлежит:

A compressor system () for a motor vehicle, with a compressor () having a driven compressor wheel () for compressing intake air for an internal combustion engine () of the motor vehicle, an intake section () extending along a first axis () for guiding air to the compressor wheel (), and a recirculation line () extending along a second axis () for recirculating exhaust gas from the internal combustion engine () into the intake section (). The intake section () has a first diameter () in the area of the opening of the recirculation line (). The recirculation line () opens eccentrically into the intake section (). 11. A compressor system () for a motor vehicle , comprising{'b': 2', '3', '9, 'a compressor () comprising a driven compressor wheel () for compressing intake air for an internal combustion engine () of the motor vehicle,'}{'b': 6', '11', '3, 'an intake section () extending along a first axis () for guiding the air to the compressor wheel (), and'}{'b': 8', '12', '9', '6, 'a recirculation line () extending along a second axis () for recirculating exhaust gas from the internal combustion engine () into the intake section (),'}{'b': 6', '10', '8, 'wherein the intake section () has a first diameter () in the area of the opening of the recirculation line (),'}{'b': 8', '6, 'wherein the recirculation line () opens eccentrically into the intake section ().'}215111210. The compressor system according to claim 1 , wherein a first distance () between the first axis () and the second axis () is at least 10% claim 1 , of the first diameter ().311148161116106. The compressor system according to claim 1 , wherein claim 1 , in a section perpendicular to the first axis () claim 1 , an outer wall () of the recirculation line () has a second distance () to the first axis () claim 1 , and wherein the second distance () is at least 30% of the first diameter () of the intake section ().42631210. The compressor system according to claim 1 , wherein a third distance () between the ...

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23-02-2017 дата публикации

METHOD AND SYSTEM FOR CALIBRATING EXHAUST VALVES

Номер: US20170051698A1
Принадлежит:

Various methods and systems are provided for calibrating one or more exhaust valves. In one example, a system comprises an exhaust valve configured to control flow of exhaust gas exiting an engine and a controller configured to calibrate the exhaust valve by commanding the exhaust valve to a fully closed position with a first driving current and measuring a first position of the exhaust valve at the first driving current, commanding the exhaust valve to a fully open position with a second driving current and measuring a second position of the exhaust valve at the second driving current, and generating a map based on a linear function determined from the first driving current, the second driving current, the measured first position, and the measured second position. The controller is further configured to adjust a position of the exhaust valve based on the map. 1. A system , comprising:an exhaust valve configured to control flow of exhaust gas exiting an engine; anda controller configured to calibrate the exhaust valve by:commanding the exhaust valve to a fully closed position with a first driving current and measuring a first position of the exhaust valve at the first driving current,commanding the exhaust valve to a fully open position with a second driving current and measuring a second position of the exhaust valve at the second driving current, andgenerating a map based on a linear function determined from the first driving current, the second driving current, the measured first position, and the measured second position,the controller further configured to adjust a position of the exhaust valve based on the map.2. The system of claim 1 , wherein the controller is configured to calibrate the exhaust valve responsive to one or more of an engine start event or a threshold amount of time elapsing since a previous engine start event or calibration event.3. The system of claim 1 , wherein the exhaust valve is a first exhaust valve controlling flow of exhaust gas to ...

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23-02-2017 дата публикации

METHOD OF REDUCING NOX EMISSIONS FROM AN ENGINE

Номер: US20170051707A1
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

A system and method for reducing rate of increase of NOx feedgas emissions during an acceleration event in a vehicle having an engine with exhaust gas recirculation (EGR) and an electric machine, such as an integrated starter-generator (ISG) coupled to the engine include operating the electric machine to provide an assist torque and reducing engine torque accordingly in response to predicted NOx feedgas emissions exceeding a threshold. The NOx feedgas emissions may be predicted based on an exhaust gas sensor signal or a NOx model based on engine speed, engine torque, and intake EGR ratio. The engine torque may be reduced by reducing an engine torque set point. The electric machine torque may be reduced when a driver demand torque matches the reduced engine torque set point. The electric machine may be used to charge a battery in response to the driver demand torque matching the engine torque set point. 1. A vehicle comprising:an engine having an exhaust gas recirculation (EGR) valve controllable to supply exhaust gas to an engine intake;an emissions control device disposed in an exhaust flow downstream of the engine;a lambda sensor disposed in the engine intake to measure an EGR ratio in the engine intake;an electric machine connected to the engine and a battery; anda controller communicating with the EGR valve, the sensor, and the electric machine, the controller programmed to, in response to an increased rate of requested engine torque during an acceleration event resulting in predicted NOx feedgas emissions exceeding a threshold, the NOx feedgas emissions determined by a NOx model based on engine speed, engine torque, and the EGR ratio measured by the lambda sensor, control the electric machine to provide an assist torque and correspondingly reduce the rate of increase of requested engine torque to meet a driver demand torque.2. The vehicle of wherein the electric machine comprises an integrated starter-generator.3. The vehicle of wherein the threshold is set ...

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01-03-2018 дата публикации

SYSTEMS AND METHOD FOR AN ENGINE BYPASS VALVE

Номер: US20180058310A1
Принадлежит:

Various systems and methods are provided for controlling operation of a turbocharger compressor. In one example, a system includes a turbocharger including a turbine positioned in an exhaust passage and a compressor positioned in an intake passage, an engine bypass passage having an inlet fluidically coupled to an outlet of the compressor and an outlet fluidically coupled to an inlet of the turbine, an engine bypass valve to control flow through the engine bypass passage, and a controller configured to adjust a position of the engine bypass valve to maintain compressor operation within a designated compressor efficiency region. 1. A system , comprising:a turbocharger including a turbine positioned in an exhaust passage and a compressor positioned in an intake passage;an engine bypass passage having an inlet fluidically coupled to an outlet of the compressor and an outlet fluidically coupled to an inlet of the turbine;an engine bypass valve to control flow through the engine bypass passage; anda controller configured to adjust a position of the engine bypass valve to maintain compressor operation within a designated compressor efficiency region.2. The system of claim 1 , further comprising:an engine having a first group of cylinders and a second set of cylinders; andan exhaust gas recirculation (EGR) system including an EGR passage coupling the first group of cylinders to the intake passage, an EGR metering valve to control flow of exhaust gas through the EGR passage, and an EGR bypass valve to control flow of exhaust gas from the first group of cylinders to the exhaust passage.3. The system of claim 2 , wherein the controller is configured to adjust a position of the EGR metering valve based on a target intake oxygen fraction and adjust a position of the EGR bypass valve to maintain a pressure of exhaust gas in the EGR passage above a pressure of intake air downstream of the compressor.4. The system of claim 2 , wherein the inlet of the turbine is a single inlet ...

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01-03-2018 дата публикации

ENGINE SYSTEM HAVING EGR APPARATUS

Номер: US20180058351A1
Автор: CHOI Choo Saeng
Принадлежит: HYUNDAI MOTOR COMPANY

An engine system having an ERG apparatus may include an engine including a plurality of combustion chambers generating a driving torque by combustion of a fuel; an intake line inflowing an intake gas supplied to the combustion chamber; an exhaust line flowing an exhaust gas exhausted from the combustion chamber; a turbocharger including a turbine provided at the exhaust line and rotated by the exhaust gas exhausted from the combustion chamber and a compressor provided at the intake line, rotated in connection with the turbine, and compressing external air; and an EGR apparatus including a recirculation line branched from the exhaust line and joined to the intake line, a flow rate controller mounted at the recirculation line and measuring and controlling an amount of recirculation gas, and a pressure sensor mounted at the recirculation line to measure a pressure of the recirculation gas. 1. An engine system having an exhaust gas recirculation (EGR) apparatus , comprising:an engine including a plurality of combustion chambers generating a driving torque by combustion of a fuel;an intake line inflowing an intake gas supplied to the combustion chambers;an exhaust line flowing an exhaust gas exhausted from the combustion chambers;a turbocharger including a turbine provided at the exhaust line and rotated by the exhaust gas exhausted from the combustion chambers and a compressor provided at the intake line, rotated in connection with the turbine, and compressing external air; andthe EGR apparatus including a recirculation line branched from the exhaust line and joined to the intake line, a flow rate controller mounted at the recirculation line and measuring and controlling an amount of recirculation gas, and a pressure sensor mounted at the recirculation line to measure a pressure of the recirculation gas.2. The engine system of claim 1 , whereinthe flow rate controller includes:a drive motor generating power;a flap mounted at a rotation axis of the drive motor and ...

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01-03-2018 дата публикации

THREE CYLINDER HEAD FOR A DEDICATED EGR INTERNAL COMBUSTION ENGINE INCLUDING TWO PORTS

Номер: US20180058390A1
Принадлежит:

A cylinder head casting for a three cylinder engine having a dedicated exhaust gas recirculation cylinder and two non-dedicated cylinders, includes three combustion chamber upper wall portions. First and second exhaust ports/runners extend from two of the three combustion chamber upper wall portions, respectively, for the non-dedicated cylinders and are paired together prior to a first common breakout at an exhaust flange in a side face of the cylinder head. A third exhaust port/runner extends from the other of the three combustion chamber upper wall portions corresponding to the dedicated EGR cylinder remains separated from the first and second exhaust port runners until a separate second breakout at the exhaust flange. 1. A cylinder head casting for a three cylinder engine having a dedicated exhaust gas recirculation cylinder and two non-dedicated cylinders , comprising;three and only three combustion chamber upper wall portions; andfirst and second pairs of exhaust ports/runners extending from a first and a second of the three combustion chamber upper wall portions, respectively, for the non-dedicated cylinders and all of the first and second pairs of exhaust ports/runners being paired together prior to a first common breakout at an exhaust flange in a side face of the cylinder head and a third pair of exhaust ports/runners of the dedicated EGR cylinder remain separated from the first and second pairs of exhaust port/runners until a separate second breakout at the exhaust flange.2. The cylinder head casting according to claim 1 , wherein the first breakout and the second breakout are disposed at a common elevation.3. The cylinder head casting according to claim 1 , wherein the first breakout and the second breakout are disposed at staggered elevations.4. An internal combustion engine claim 1 , comprising:an engine block defining three and only three cylinders; anda cylinder head casting including three and only three combustion chamber upper wall portions and ...

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01-03-2018 дата публикации

SYSTEM AND METHOD FOR OPERATING AN ENGINE

Номер: US20180058391A1
Принадлежит:

Methods and systems for operating an engine including an external exhaust gas recirculation (EGR) system are presented. In one non-limiting example, output of a differential pressure sensor and output of an intake manifold pressure sensor are used as a basis for determining whether or not EGR system degradation is present while an engine is operating at conditions other than engine idle conditions. 1. A method for operating an engine , comprising:receiving a differential pressure sensor output and intake manifold pressure sensor output to a controller;judging whether or not exhaust gas recirculation system degradation is present responsive to the differential pressure sensor output and the intake manifold pressure sensor output while operating an engine with intake manifold pressure greater than atmospheric pressure via the controller; andadjusting an actuator via the controller responsive to the judgment.2. The method of claim 1 , where the actuator is a waste gate.3. The method of claim 1 , further comprising converting the differential pressure sensor output to a differential pressure claim 1 , and where the judgement is based on the differential pressure exceeding a second threshold.4. The method of claim 3 , further comprising converting the intake manifold pressure sensor output to an intake manifold pressure claim 3 , and where the judgement is also based on the intake manifold pressure minus a barometric pressure exceeding a first threshold.5. The method of claim 1 , further comprising converting the differential pressure sensor output to a differential pressure claim 1 , and where the judgement is based on an absolute value of the differential pressure exceeding an eighth threshold.6. The method of claim 5 , further comprising converting the intake manifold pressure sensor output to an intake manifold pressure claim 5 , and where the judgement is also based on the intake manifold pressure minus a barometric pressure exceeding a seventh threshold.7. The ...

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02-03-2017 дата публикации

METHOD AND DEVICE FOR CONTROLLING A MOTOR-VEHICLE INTERNAL COMBUSTION ENGINE FITTED WITH A FUEL INJECTION SYSTEM AND AN EXHAUST GAS RECIRCULATION SYSTEM

Номер: US20170058801A1
Принадлежит:

Embodiments are provided herein for controlling a motor-vehicle internal combustion engine fitted with a fuel injection system and an exhaust gas recirculation system. In one example, in a deceleration phase a closed exhaust gas recirculation circuit is formed, a mass (m) of an air quantity enclosed therein is determined, a first oxygen content (O, O) of the air quantity is detected, a test injection is carried out with an injection valve, a second oxygen content (O, O) of the air quantity is detected, and the fuel mass (m) injected in the test injection is determined from the mass (m) of the air quantity and the first and the second oxygen content (O, O, O, O). The disclosure also relates to a corresponding device for controlling a motor-vehicle internal combustion engine fitted with a fuel injection system and an exhaust gas recirculation system. 1. A method for controlling a motor-vehicle internal combustion engine fitted with a fuel injection system and an exhaust gas recirculation system , comprising:in a deceleration phase, forming a closed exhaust gas recirculation circuit;{'sub': 'circ', 'determining a mass (m) of an air quantity enclosed in the closed exhaust gas recirculation circuit;'}detecting a first oxygen content of the air quantity;carrying out a test injection with an injection valve;detecting a second oxygen content of the air quantity; and{'sub': fuel', 'circ, 'determining a fuel mass (m) injected in the test injection from the mass (m) of the air quantity and the first and the second oxygen contents.'}2. The method as claimed in claim 1 , wherein forming the closed exhaust gas recirculation circuit comprises activating an exhaust valve claim 1 , an intake throttle valve claim 1 , and an exhaust gas recirculation valve claim 1 , or activating the exhaust valve and a three-way valve in an intake tract.3. The method as claimed in claim 1 , wherein the mass (m) of the air quantity is determined by at least one pressure sensor and at least one ...

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17-03-2022 дата публикации

INTERNAL COMBUSTION ENGINE INCLUDING EXHAUST GAS RECIRCULATION

Номер: US20220082067A1
Принадлежит:

An internal combustion engine including a crankcase () and including a cylinder head is described, including at least one cylinder block, at least one planar flange surface for accommodating at least one cooler (), at least one cooler (), at least one coolant inlet to the cooler (), at least one coolant outlet () from the cooler (), at least one exhaust gas inlet to the cooler (), at least one integrated exhaust gas feedthrough from the cooler (), and at least one internal cooling section (). 19-. (canceled)10: An internal combustion engine comprising:a crankcase including a cylinder block;a cylinder head;a cooler configured for cooling recirculated exhaust gas;a planar flange surface for accommodating the cooler;a coolant inlet to the cooler;a coolant outlet from the cooler;an exhaust gas inlet to the cooler;an exhaust gas inlet to the cooler; andan integrated exhaust gas feedthrough from the cooler,the cooler including an internal cooling section.11: The internal combustion engine as recited in claim 10 , wherein the internal cooling section includes turbulence generators.12: The internal combustion engine as recited in claim 10 , wherein the coolant inlet to the cooler is configured to be regulatable.13: The internal combustion engine as recited in claim 10 , wherein the exhaust gas inlet to the cooler is configured to be regulatable.14: The internal combustion engine as recited in claim 10 , wherein the planar flange surface is situated on a longitudinal side of the crankcase for accommodating the cooler.15: The internal combustion engine as recited in claim 14 , wherein diaphragms and/or throttle devices are inserted between the cooler and the crankcase.16: The internal combustion engine as recited in claim 16 , wherein the diaphragms and/or throttle devices inserted between the cooler and the crankcase are cast fins and cast ribs.17: The internal combustion engine as recited in claim 10 , wherein the planar flange surface is situated at a longitudinal side of ...

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28-02-2019 дата публикации

CRANK PIN OFFSET IN DEDICATED EXHAUST GAS ENGINES

Номер: US20190063311A1
Принадлежит:

A four stroke internal combustion engine with dedicated exhaust gas recirculation and method of operating such engine, wherein the engine comprises a plurality of combustion cylinders including main cylinders and a dedicated exhaust gas recirculation cylinder, wherein each cylinder includes a piston; a crankshaft, which is rotatable in a direction, and defines a main crankshaft axis, and includes a plurality of crankpins. Each of the crankpins is coupled to at least one of the pistons. The crankpins affixed to the pistons of the main cylinders are spaced at an interval around the main crankshaft axis. The crankpin affixed to the piston of the dedicated exhaust gas recirculation cylinder is spaced at an offset of 5 to 50 degrees from the interval in either direction relative to the direction of crankshaft rotation. 1. A four stroke internal combustion engine with dedicated exhaust gas recirculation , comprising:a plurality of combustion cylinders including at least two main cylinders and a dedicated exhaust gas recirculation cylinder, wherein each cylinder includes a piston; a) said crankpins affixed to said pistons of said main cylinders are spaced at an interval around said main crankshaft axis, and', 'b) said crankpin affixed to said piston of said dedicated exhaust gas recirculation cylinder is spaced at an offset of 5 to 20 degrees from said interval in either direction relative to the direction of crankshaft rotation around said main crankshaft axis,, 'a crankshaft, which is rotatable in a direction and defines a main crankshaft axis, wherein said crankshaft includes a plurality of crankpins and each of said crankpins is coupled to at least one of said pistons, and'}wherein said plurality of combustion cylinders are configured to operate in a four-stroke cycle.2. The internal combustion engine of claim 1 , comprising three main cylinders and one dedicated exhaust cylinder claim 1 , wherein said interval is 180 degrees.3. The internal combustion engine of claim ...

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28-02-2019 дата публикации

SYSTEMS AND METHODS FOR CONTROLLING AIR-FUEL RATIO IN DEDICATED EGR ENGINE

Номер: US20190063349A1
Принадлежит:

Systems, apparatus, and methods are disclosed that include a divided exhaust engine with at least one primary exhaust gas recirculation (EGR) cylinder and a plurality of non-primary EGR cylinders. The systems, apparatus and methods control the fueling to the at least one primary EGR cylinder in response to EGR fraction reduction conditions. 1. A system comprising:an internal combustion engine having at least one primary exhaust gas recirculation (EGR) cylinder connected to provide an EGR flow to an EGR passage and a plurality of non-primary cylinders connected to provide an exhaust flow to an exhaust passage, wherein the EGR passage is connected to an intake system to provide an EGR flow from the at least one primary EGR cylinder to the intake system, wherein the intake system provides a charge flow to the at least one primary EGR cylinder and the plurality of non-primary cylinders, the charge flow including an intake air flow and an EGR fraction provided by an amount of recirculated exhaust gas from at least the at least one primary EGR cylinder; anda controller configured to interpret an EGR fraction reduction condition in which the EGR fraction provided by the amount of recirculated exhaust gas in the charge flow is reduced from an expected EGR fraction during steady state conditions, and in response to the EGR fraction reduction condition the controller is configured to reduce an air-fuel ratio in the at least one primary EGR cylinder.2. The system of claim 1 , further comprising a fuel system connected by at least one injector to each of the at least one primary EGR cylinder and the plurality of non-primary EGR cylinders claim 1 , wherein the controller is configured to increase the fueling amount from the at least one injector connected to the at least one primary EGR cylinder by an amount that reduces the air-fuel ratio relative to a steady state air-fuel ratio.3. The system of claim 1 , wherein the at least one primary EGR cylinder includes at least two ...

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28-02-2019 дата публикации

METHODS AND SYSTEMS FOR BOOST AND EGR CONTROL

Номер: US20190063351A1
Принадлежит:

Methods and systems are provided for controlling boost pressure and exhaust gas recirculation in a split exhaust system. In one example, a first portion of exhaust may be routed from a cylinder to an exhaust turbine via a first exhaust valve and a second, remaining portion of exhaust may be routed as exhaust gas recirculation (EGR) via a second exhaust valve, the timing and lift of each of the first valve profile and the second valve profile adjusted based on boost error and EGR error. Further, motor torque from an electric motor may be supplied to the turbocharger to attain a desired boost pressure and a desired EGR flow. 1. An engine system , comprising:an engine including a cylinder;a turbocharger including an intake compressor, an exhaust turbine, and an electric motor, wherein the intake compressor is driven via one or more of the turbine and the motor; anda split exhaust system wherein a first portion of exhaust from the cylinder is recirculated to an engine intake, upstream of the intake compressor, via an EGR passage while a second, remaining portion of the exhaust from the cylinder is directed to the exhaust turbine, via an exhaust passage; anda controller with computer readable instructions stored on non-transitory memory that when executed cause the controller to adjust a timing of a first exhaust valve coupled to the EGR passage relative to a second exhaust valve of the cylinder coupled to the exhaust passage to vary the first portion relative to the second portion.2. The system of claim 2 , wherein adjusting the timing includes adjusting a timing of opening the first exhaust valve relative to the second exhaust valve.3. The system of claim 2 , wherein the controller includes further instructions that when executed cause the controller to adjust an amount of valve lift of the first exhaust valve relative to the second exhaust valve of the cylinder to vary the first portion relative to the second portion.4. The system of claim 3 , wherein the adjusting ...

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28-02-2019 дата публикации

METHODS AND SYSTEMS FOR DIAGNOSING ENGINE INTERNAL EXHAUST GAS RECIRCULATION

Номер: US20190063377A1
Автор: Dudar Aed M.
Принадлежит:

Systems and methods for diagnosing operation of an internal exhaust gas recirculation system of an internal combustion engine are presented. The system and method may be applied to conventional or hybrid powertrains having a capability to rotate an engine via an electric machine. The internal exhaust gas recirculation system may be diagnosed based on output of a differential pressure sensor. 1. A method , comprising:rotating an engine that is not combusting an air-fuel mixture and generating a difference between a sensor output with an EGR system commanded to a baseline position and the sensor output with the EGR system commanded to a non-baseline position in response to a request to diagnose the EGR system; andadjusting output of the engine when the engine is combusting air and fuel responsive to the difference.2. The method of claim 1 , where the engine is rotated via an electric machine that propels a vehicle.3. The method of claim 1 , further comprising rotating the engine in further response to a predetermined amount of time since occupants have most recently exited a vehicle.4. The method of claim 1 , further comprising rotating the engine in further response to a vehicle that includes the engine being a human driverless vehicle.5. The method of claim 1 , further comprising rotating the engine in further response to a request to remotely start a vehicle that includes the engine.6. The method of claim 1 , further comprising rotating the engine in further response to a battery state of charge being greater than a threshold.7. The method of claim 1 , further comprising rotating the engine in further response to a temperature of a catalyst being greater than a threshold.8. The method of claim 1 , where the sensor is a differential pressure sensor configured to sense pressure across a particulate filter.9. The method of claim 1 , where the EGR system includes an intake cam and an exhaust cam.10. A method claim 1 , comprising:rotating an engine of a vehicle that is ...

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28-02-2019 дата публикации

Linear Drive Apparatus

Номер: US20190063566A1
Принадлежит: Continental Automotive GmbH

A linear drive apparatus including: a housing. Located inside the housing are an electric motor, a transmission gear, which meshes with an output gear on an output shaft of the electric motor, a gear shaft, and a linear motion assembly. The transmission gear is mounted on the gear shaft, the linear motion assembly is mounted to cooperate with the transmission gear, and converts rotational motion of the transmission gear to linear motion. An axis of the linear motion assembly is arranged in the same plane as an axis of the electric motor output shaft and an axis of the gear shaft. The linear drive apparatus has the advantages of a compact structure, small volume, light weight, and good heat dissipation.

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29-05-2014 дата публикации

Method and apparatus for determining abnormality in exhaust gas recirculation amount

Номер: US20140144219A1
Принадлежит: HINO MOTORS LTD

An absolute value of a deviation of an actual EGR ratio, calculated in a current operational status of an engine 1, from a target EGR ratio set on the basis of current operational status of the engine 1 is acquired and is multiplied by a quotient, as gain, acquired from division of a feedback correction amount of opening degree of an EGR valve 12 by an upper limit of the feedback correction amount to determine normality when an acquired product is close to “0” and determine higher degree of abnormality the further the product is away from “0”.

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29-05-2014 дата публикации

Engine Including Exhaust Gas Recirculation Injection System

Номер: US20140144413A1
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An engine assembly according to the principles of the present disclosure includes an engine structure, an intake system, an exhaust system, and an exhaust gas recirculation (EGR) assembly. The engine structure defines cylinders having intake and exhaust ports. The intake system includes an intake manifold that provides air to the cylinders through the intake ports. The exhaust system includes an exhaust manifold in communication with the exhaust ports for expelling exhaust gas from the cylinders. The EGR system includes an EGR pipe, an EGR valve, an EGR reservoir, and an EGR injector. The EGR pipe extends from at least one of the exhaust system, the exhaust ports, and the cylinders to the EGR reservoir. The EGR valve regulates exhaust flow through the EGR pipe. The EGR injector is operable to deliver exhaust gas from the EGR reservoir directly to at least one of the intake ports and the cylinders.

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10-03-2016 дата публикации

Internal combustion engine egr flow rate estimation apparatus and internal combustion engine control apparatus

Номер: US20160069285A1
Принадлежит: Mitsubishi Electric Corp

Based on an internal EGR ratio and desired external and internal EGR ratios, an EGR valve opening degree is feedback-controlled based on a desired EGR ratio, calculated in such a way as to perform correction so that a total EGR ratio becomes constant, and an EGR effective opening area obtained through learning of the relationship between an EGR valve opening degree and an effective opening area; thus, a correct characteristic of EGR valve opening degree vs. effective opening area can be maintained and hence it is made possible to absorb variations, changes with time, and even environmental conditions, while making an EGR valve and an intake/exhaust VVT collaborate with each other; therefore, an EGR flow rate can accurately be estimated.

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10-03-2016 дата публикации

Method and systems for exhaust gas recirculation system diagnosis

Номер: US20160069301A1
Принадлежит: General Electric Co

Various methods and systems are provided for diagnosing a condition of a component in an exhaust gas recirculation system. In one example, a method includes selectively routing exhaust from a first subset of engine cylinders to an exhaust passage via a first valve and to an intake passage via a second valve and determining a respective condition of each of the first valve and second valve based on a first exhaust pressure of the first subset of engine cylinders and a second exhaust pressure of a second subset of engine cylinders.

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08-03-2018 дата публикации

DEDICATED EGR ENGINE WITH DEDICATED LOOP TURBOCHARGER

Номер: US20180066610A1
Автор: Roth David B.
Принадлежит:

A product may include an engine that may have a set of cylinders with one cylinder that may deliver a first stream of exhaust gases to a first conduit and other cylinders that may deliver a second stream of exhaust gases to a second conduit. An intake system may supply the set of cylinders with a combustion air. First and second turbochargers may be provided wherein the combustion air may be charged in the intake system through first and second compressors. The first stream of exhaust gases from the one cylinder may be routed through the first turbine. 1. A product comprising an engine having a set of cylinders with one cylinder in the set of cylinders delivering a first stream of exhaust gases to a first conduit and all cylinders in the set of cylinders other than the one cylinder comprising a subset of cylinders that deliver a second stream of exhaust gases to a second conduit , an intake system supplying the set of cylinders with a combustion air , wherein the intake system comprises an air inlet , a first turbocharger with a first turbine driving a first compressor and a second turbocharger with a second turbine driving a second compressor , the combustion air charged in the intake system through the first and second compressors , and the first stream of exhaust gases from the one cylinder being routed through the first turbine; and wherein the first turbocharger provides a first stage boost and the second turbocharger provides a second stage boost wherein intake air consisting of air from the air inlet is first channeled through the first compressor and then through the second compressor after which the intake air is mixed with the first stream of exhaust gases and is then delivered into the engine through the intake system.2. The product according to wherein the first stream of exhaust gases is recirculated into the intake system providing EGR from the one cylinder as a dedicated cylinder for the EGR.3. The product of wherein the second stream of exhaust gases ...

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27-02-2020 дата публикации

VALVE OPENING CONTROL APPARATUS AND METHOD OF GASOLINE EGR SYSTEM

Номер: US20200063677A1
Автор: KIM Han Sang
Принадлежит:

The present disclosure relates to a valve opening control apparatus and method of a gasoline EGR system. The valve opening control apparatus includes a gasoline engine generating driving power through combustion, an intake line through which an intake gas flows into a combustion chamber of the gasoline engine, an exhaust line through which an exhaust gas is discharged from the combustion chamber, a recirculation line branched off from the exhaust line and connected to the intake line, an EGR cooler, positioned in the recirculation line, cooling the exhaust gas flowing in the intake line, an EGR valve configured to control an amount of the exhaust gas flowing in the intake line, an emergency (EM) filter positioned in one end of the EGR valve, and a flow rate regulator configured to control an opening amount of the EGR valve according to a clogging state of the EM filter. 1. A valve opening control apparatus of a gasoline exhaust gas recirculation (EGR) system , the apparatus comprising:a gasoline engine generating driving power through combustion;an intake line through which an intake gas flows into a combustion chamber of the gasoline engine;an exhaust line through which an exhaust gas is discharged from the combustion chamber;a recirculation line branched off from the exhaust line and connected to the intake line;an EGR cooler, positioned in the recirculation line, cooling the exhaust gas flowing in the intake line;an EGR valve configured to control an amount of the exhaust gas flowing in the intake line;an emergency (EM) filter positioned in one end of the EGR valve; anda flow rate regulator configured to control an opening amount of the EGR valve according to a clogging state of the EM filter.2. The apparatus of claim 1 , wherein the flow rate regulator measures the clogging state of the EM filter claim 1 ,in response to a determination that a clogging degree of the EM filter is less than a first reference value, the flow rate regulator is configured to maintain ...

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09-03-2017 дата публикации

SYSTEMS AND METHODS FOR DEDICATED EGR CYLINDER EXHAUST GAS TEMPERATURE CONTROL

Номер: US20170067418A1
Принадлежит:

Systems and methods for increasing EGR gas temperature for an engine that includes at least one dedicated EGR cylinder. The dedicated EGR cylinder may provide exhaust gas to engine cylinders and the exhaust gas does not include exhaust gases from cylinders other than the dedicated EGR cylinder. The dedicated EGR cylinder may allow the engine to operate at higher EGR dilution levels. 1. A method for an engine , comprising:recirculating exhaust gas from only a dedicated EGR cylinder to an intake of engine cylinders;increasing EGR temperature in the dedicated EGR cylinder via increasing an air-fuel ratio of the dedicated EGR cylinder in response to EGR cooler condensation; andoperating remaining engine cylinders about a stoichiometric air-fuel ratio in response to the EGR cooler condensation.2. The method of claim 1 , further comprising advancing exhaust valve opening timing of the dedicated EGR cylinder without advancing exhaust valve opening timing of the remaining engine cylinders.3. The method of claim 1 , further comprising decreasing intake and exhaust valve opening overlap of the dedicated EGR cylinder without decreasing intake and exhaust opening overlap of the remaining engine cylinders.4. The method of claim 1 , where the dedicated EGR cylinder provides exhaust gas to the cylinders upstream of a throttle and compressor.5. The method of claim 1 , where the dedicated EGR cylinder provides exhaust gas to the cylinders downstream of a compressor.6. The method of claim 1 , where the air-fuel ratio of the dedicated EGR cylinder is made leaner via increasing the air-fuel ratio of the dedicated EGR cylinder claim 1 , and where the air-fuel ratio of the remaining engine cylinders is maintained about stoichiometric conditions.720-. (canceled) The present description relates to systems and methods for improving operation of an engine that operates with high levels of exhaust gas recirculation (EGR). The methods may be particularly useful for engines that include one or ...

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11-03-2021 дата публикации

ENGINE SYSTEM

Номер: US20210071624A1
Принадлежит:

An engine system may include: an engine including cylinders that generate a driving torque by combusting fuel; a first intake manifold connected to an intake line through which flows intake air into some of the plurality of cylinders; a second intake manifold supplying the intake air to the other cylinders of the plurality of cylinders through the first intake manifold; a first exhaust manifold connected to some cylinders that are connected to the first intake manifold; a second exhaust manifold connected to some other cylinders that are connected to the second intake manifold; a recirculation line branched from the second exhaust manifold to be coupled to the second intake manifold; a recirculation inlet valve disposed at a point at which the recirculation line and the second exhaust manifold are joined; and a manifold connection valve disposed on an intake line between the first intake manifold and the second intake manifold. 14-. (canceled)5. An engine system , comprising:an engine including a plurality of cylinders that generate a driving torque by combusting fuel;a first intake manifold connected to an intake line through which flows intake air into some of the plurality of cylinders;a second intake manifold supplying the intake air to other cylinders of the plurality of cylinders through the first intake manifold;a first exhaust manifold connected to some cylinders that are connected to the first intake manifold;a second exhaust manifold connected to some other cylinders that are connected to the second intake manifold;a recirculation line branched from the second exhaust manifold to be coupled to the second intake manifold;a recirculation inlet valve disposed at a point at which the recirculation line and the exhaust manifold are joined;a manifold connection valve disposed on an intake line between the first intake manifold and the second intake manifold, anda turbocharger including a turbine which is disposed on the second exhaust line and rotates by exhaust ...

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15-03-2018 дата публикации

Method of Operating Internal Combustion Engine Having Increased Rich Limit for Dedicated EGR Cylinder

Номер: US20180073472A1
Автор: Cary A Henry
Принадлежит: Southwest Research Institute SwRI

A method of providing internal EGR to an engine having at least one dedicated EGR cylinder. The main (non dedicated) cylinders are operated with internal EGR, in addition to external EGR from the dedicated EGR cylinder. The dedicated EGR cylinder has separate valve control so that it need not be operated with internal EGR, thereby allowing it to be operated at a richer air-to-fuel ratio.

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07-03-2019 дата публикации

CONNECTION STATE DETERMINATION DEVICE FOR BREATHER PIPE

Номер: US20190072059A1
Принадлежит: Honda Motor Co.,Ltd.

Provided is a connection state determination device. The connection state determination device for the breather pipe determines the connection state of a breather pipe in an internal combustion engine having a supercharger, and the breather pipe is connected between an engine body including a crank case and an intake passage on the upstream side of a compressor of the supercharger, and communicates the crank case and the intake passage. The connection state determination device includes a pipe internal pressure sensor that detects the pressure inside the breather pipe, a pulsation waveform obtaining part for obtaining pulsation due to the variation of pressure inside the breather pipe as a pulsation waveform based on the detected pressure, and a connection state determination part that determines the connection state of the breather pipe based on the pulsation waveform. 1. A connection state determination device for a breather pipe in an internal combustion engine having a supercharger that determines a connection state of the breather pipe connected between an engine body including a crank case and an intake passage on an upstream side of a compressor of the supercharger and communicates the crank case and the intake passage , the connection state determination device for the breather pipe comprisinga pipe internal pressure sensor that detects pressure inside the breather pipe,a pulsation waveform obtaining part for obtaining pulsation due to variation of the pressure inside the breather pipe as a pulsation waveform based on the pressure detected, anda connection state determination part that determines the connection state of the breather pipe based on the pulsation waveform.2. The connection state determination device for the breather pipe according to claim 1 , whereinan intake passage side pipe connection part for connecting an end portion of the breather pipe is disposed to the intake passage, andthe pipe internal pressure sensor is attached to the intake ...

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24-03-2022 дата публикации

EGR DEVICE

Номер: US20220090550A1
Принадлежит: SUBARU CORPORATION

An EGR device for a vehicle includes a valve driver, a pressure comparison unit, a freeze determination unit, and an EGR controller. The valve driver drives an EGR valve to open, when fuel cut has been continued for a predetermined time in a state where an engine speed of a vehicle's engine is equal to or higher than a predetermined rotational speed. The pressure comparison unit compares a pre-driving pressure of an engine's intake pipe with a post-driving pressure of the intake pipe. The freeze determination unit sets a flag indicating that the EGR valve is frozen when a difference between the pre-driving pressure and the post-driving pressure is less than a predetermined value and an external temperature is less than a threshold. When the flag has been set, the EGR controller sets a control state of the EGR valve to a closed state and stops EGR control. 1. An EGR device to be applied to a vehicle , the EGR device comprising:a valve driver configured to drive an EGR valve to open, when fuel cut has been continued for a predetermined time in a state where an engine speed of an engine of the vehicle is equal to or higher than a predetermined rotational speed;a pressure comparison unit configured to compare a pre-driving pressure of an intake pipe of the engine before the EGR valve is driven with a post-driving pressure of the intake pipe after the EGR valve has been driven;a freeze determination unit configured to set a determination flag indicating that the EGR valve is frozen when a difference between the pre-driving pressure and the post-driving pressure is less than a predetermined value and an external temperature is less than a threshold; andan EGR controller configured to, when the determination flag has been set, set a control state of the EGR valve to a closed state and stop EGR control.2. The EGR device according to claim 1 , further comprising:a flag controller, whereinthe EGR controller is configured to turn off the determination flag when the difference ...

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16-03-2017 дата публикации

Combustion Pre-Chamber and Method for Operating Same

Номер: US20170074184A1
Автор: Kim Charlie
Принадлежит: CATERPILLAR INC.

An internal combustion engine includes a pre-chamber assembly including a wall having an internal surface opposite an external surface, the internal surface of the wall defining a combustion pre-chamber and at least one orifice extending to an aperture through the external surface of the wall; a block having an internal surface defining a bore therein; a piston disposed within the bore and configured for reciprocal translation within the bore, the piston, the bore, and the external surface of the wall at least partly defining a main combustion chamber, and the combustion pre-chamber being in fluid communication with the main combustion chamber via the at least one orifice; an energy source operatively coupled to the combustion pre-chamber; and an exhaust gas recirculation (EGR) valve fluidly coupled to the combustion pre-chamber and an exhaust conduit of the internal combustion engine. 1. An internal combustion engine , comprising:a pre-chamber assembly including a wall having an internal surface opposite an external surface, the internal surface of the wall defining a combustion pre-chamber and at least one orifice extending to an aperture through the external surface of the wall;a block having an internal surface defining a bore therein;a piston disposed within the bore and configured for reciprocal translation within the bore,the piston, the bore, and the external surface of the wall at least partly defining a main combustion chamber, and the combustion pre-chamber being in fluid communication with the main combustion chamber via the at least one orifice;an energy source operatively coupled to the combustion pre-chamber;an exhaust gas recirculation (EGR) valve fluidly coupled to the combustion pre-chamber and an exhaust conduit of the internal combustion engine; anda controller operatively coupled to the energy source and the EGR valve, the controller being configured toadmit a flow of exhaust gas into the combustion pre-chamber along a flow path that does not ...

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16-03-2017 дата публикации

Internal Combustion Engine Utilizing Two Independent Flow Paths To A Dedicated Exhaust Gas Recirculation Cylinder

Номер: US20170074214A1
Автор: CHIU James P.
Принадлежит:

An exhaust gas recirculation (EGR) system and corresponding method for improved combustion efficiency of an internal combustion engine having a number of cylinders, comprising one or more main cylinders connected to an intake manifold and one or more cylinders operable as a dedicated EGR cylinder(s). The dedicated EGR cylinder(s) have two independent intake flow paths for where one flow path provides only intake air and one flow path provides air and recirculated exhaust gas. The exhaust gas output of the one or more dedicated EGR cylinders are connected to an exhaust gas recirculation loop which delivers the exhaust gas output to the main cylinder intake manifold. 1. An exhaust gas recirculation (EGR) system for improved combustion efficiency of an internal combustion engine having a number of cylinders , comprising:one or more main cylinders connected to an intake manifold;one or more cylinders operable as a dedicated EGR cylinder(s), having two independent intake flow paths for said dedicated cylinder(s) where one flow path provides only intake air and one flow path provides air and recirculated exhaust gas, the exhaust gas output of said one or more dedicated EGR cylinders connected to an exhaust gas recirculation loop which delivers said exhaust gas output to said main cylinder intake manifold.2. The exhaust gas recirculation system of wherein said intake manifold includes a pathway for introducing said air and recirculated exhaust gas to said one or more cylinders operable as a dedicated EGR cylinder(s).3. The exhaust gas recirculation system of wherein said flow path providing only intake air to said one or more dedicated EGR cylinder(s) includes an air cooler.4. The exhaust gas recirculation system of wherein said flow path providing only intake air to said one or more dedicated EGR cylinder(s) includes a cylinder throttle.5. The exhaust gas recirculation system of wherein said one or more dedicated EGR cylinder(s) has a single exhaust port which is ...

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16-03-2017 дата публикации

METHODS AND SYSTEMS FOR DIAGNOSING AN INTAKE OXYGEN SENSOR BASED ON PRESSURE

Номер: US20170074215A1
Принадлежит:

Methods and systems are provided for diagnosing an intake oxygen sensor. In one example, a method may include indicating degradation of an intake oxygen sensor based on a first time constant of an output of the intake oxygen sensor and a second time constant of an output of a throttle inlet pressure sensor. The method may further include adjusting EGR flow based on the output of the intake oxygen sensor and the output of the throttle inlet pressure sensor when the intake oxygen sensor is not degraded. 1. A method comprising:adjusting exhaust gas recirculation (EGR) flow based on a first output of an intake oxygen sensor in response to a difference between a first time constant of the first output and a second time constant of a second output of a throttle inlet pressure sensor being less than a threshold; andadjusting the EGR flow based on an alternate sensor output in response to the difference being greater than the threshold.2. The method of claim 1 , wherein adjusting the EGR flow based on the alternate sensor output includes not adjusting the EGR flow based on the first output of the intake oxygen sensor in response to the difference being greater than the threshold.3. The method of claim 1 , wherein adjusting the EGR flow based on the alternate sensor output includes adjusting the EGR flow based on a third output of a differential pressure over valve (DPOV) sensor positioned around an EGR valve disposed in an EGR passage coupled between an exhaust passage claim 1 , downstream of a turbine claim 1 , and an intake passage claim 1 , upstream of a compressor claim 1 , where the DPOV sensor detects a pressure difference between an upstream region of the EGR valve and a downstream region of the EGR valve.4. The method of claim 1 , wherein adjusting EGR flow includes adjusting an amount of EGR flow delivered to an intake passage claim 1 , upstream of a compressor claim 1 , via adjusting a position of an EGR valve disposed in an EGR passage coupled between an exhaust ...

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