СПОСОБ УПРАВЛЕНИЯ ТРАНСПОРТНЫМ СРЕДСТВОМ

Группа изобретений относится к области транспортного машиностроения. Варианты способа управления транспортным средством содержат этапы, на которых: управляют вспомогательным устройством для накопления энергии в устройстве накопления энергии в зависимости от работы двигателя в нормальном режиме; управляют вспомогательным устройством, приводимым в действие устройством накопления энергии, для подачи крутящего момента на коленчатый вал в зависимости от работы в режиме VDE. Транспортное средство содержит двигатель, вспомогательное устройство и контроллер. Двигатель работает в режиме переменного рабочего объема. Вспомогательное устройство соединено с коленчатым валом двигателя. Контроллер выполнен с возможностью работы вспомогательного устройства для подачи крутящего момента на коленчатый вал, когда двигатель работает в режиме VDE в зависимости от потребности в крутящем моменте и числе оборотов двигателя. Достигается улучшение надежности работы двигателя транспортного средства с переменным рабочим ...

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА ДЛЯ ДВИГАТЕЛЯ С РАЗВЕТВЛЕННОЙ ВЫПУСКНОЙ СИСТЕМОЙ

Изобретение может быть использовано в двигателях внутреннего сгорания с разветвленной выпускной системой, содержащих систему рециркуляции отработавших газов. Способ для двигателя заключается в том, что если нагрузка двигателя (10) ниже порога, отключают все впускные клапаны (2), (4) цилиндра двигателя (10). Эксплуатируют первый выпускной клапан (6), соединенный с магистралью (50) рециркуляции отработавших газов, сообщенной с заборным каналом (28), и второй выпускной клапан (8) с разными фазами газораспределения, соединенный с выпускным каналом (74). Направляют всасываемый воздух из заборного канала (28) по магистрали (50) рециркуляции отработавших газов в цилиндр двигателя (10) через первый выпускной клапан (6). Раскрыты вариант способа для двигателя и система для двигателя. Технический результат заключается в предотвращении падения нагрузки двигателя. 3 н. и 17 з.п. ф-лы, 31 ил.

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА ПРОГРЕВА КАТАЛИТИЧЕСКОГО НЕЙТРАЛИЗАТОРА ОТРАБОТАВШИХ ГАЗОВ

СПОСОБ ДЛЯ ДВИГАТЕЛЯ (ВАРИАНТЫ)

... 1. Способ для двигателя, включающий в себя этап, на котором:в ответ на температуру выхлопных газов сгорания в первом цилиндре выше пороговой температуры, выполняют подавляющее преждевременное воспламенение действие во втором цилиндре, принимающем выхлопные остаточные газы от сгорания в первом цилиндре.2. Способ по п. 1, в котором подавляющее преждевременное воспламенение действие выполняют в ответ на температуру выхлопных газов сгорания в первом цилиндре выше пороговой температуры, и количество выхлопных остаточных газов, выпускаемых из первого цилиндра, выше порогового количества.3. Способ по п. 1, в котором выполнение подавляющего преждевременное воспламенение действия во втором цилиндре включает в себя этап, на котором избирательно прекращают впрыск топлива во второй цилиндр.4. Способ по п. 1, в котором выполнение подавляющего преждевременное воспламенение действия во втором цилиндре включает в себя этап, на котором регулируют впрыск топлива во второй цилиндр, чтобы был богаче, чем стехиометрия ...

СПОСОБ И СИСТЕМА ДЛЯ ОЦЕНКИ ЗАРЯДА ВОЗДУХА

СПОСОБ УПРАВЛЕНИЯ ТРАНСПОРТНЫМ СРЕДСТВОМ

СИСИТЕМА И СПОСОБ ДЛЯ УЛУЧШЕНИЯ ОТКЛЮЧЕНИЯ ЦИЛИНДРОВ

СИСТЕМА И СПОСОБ ДЛЯ ВОЗОБНОВЛЕНИЯ РАБОТЫ ЦИЛИНДРОВ ДВИГАТЕЛЯ

Управление отключением цилиндров для торможения силовым агрегатом

Силовая установка гибридной мобильной машины

СПОСОБ АДАПТИВНОГО УПРАВЛЕНИЯ СИСТЕМОЙ ДВИГАТЕЛЯ МОТОРНОГО ТРАНСПОРТНОГО СРЕДСТВА

УСТРОЙСТВО УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

... 1. Устройство управления для двигателя внутреннего сгорания, содержащего механизм регулирования фаз газораспределения, который преобразует фазы газораспределения клапана двигателя в переменные и содержит механизм промежуточной блокировки, который механически блокирует фазы газораспределения в положении промежуточной блокировки между положением наибольшего запаздывания и положением наибольшего опережения, причем устройство прерывисто прекращает работу двигателя, отличающееся тем, чтосодержит средство запрещения, которое запрещает прерывистую остановку двигателя при возникновении неисправности механизма регулируемых фаз газораспределения.2. Устройство управления для двигателя внутреннего сгорания, содержащего механизм регулирования фаз газораспределения, который преобразует фазы газораспределения клапана двигателя в переменные и содержит механизм промежуточной блокировки, который механически блокирует фазы газораспределения в положении промежуточной блокировки между положением наибольшего ...

СПОСОБ ЭКСПЛУАТАЦИИ ДВИГАТЕЛЯ С СИСТЕМОЙ РЕЦИРКУЛЯЦИИ ОТРАБОТАВШИХ ГАЗОВ (ВАРИАНТЫ)

Система и способ для двигателя с отключаемыми цилиндрами

ДИАГНОСТИКА ТОПЛИВНОГО ИНЖЕКТОРА В ДВИГАТЕЛЕ С ОТКЛЮЧАЕМЫМИ ЦИЛИНДРАМИ

СПОСОБ ДЛЯ ДВИГАТЕЛЯ (ВАРИАНТЫ)

... 1. Способ для двигателя, включающий в себя этап, на котором:Осуществляют работу первой группы цилиндров в первом ряду двигателя для обеспечения результирующего потока воздуха и выхлопных газов из первого впускного коллектора в первый выпускной коллектор при осуществлении работы второй группы цилиндров во втором ряду двигателя для обеспечения результирующего потока выхлопных газов из второго выпускного коллектора во второй впускной коллектор.2. Способ по п. 1, в котором первый выпускной коллектор присоединен ко второму выпускному коллектору в месте соединения, расположенном ниже по потоку от первого каталитического нейтрализатора выхлопных газов первого ряда и второго каталитического нейтрализатора выхлопных газов второго ряда.3. Способ по п. 2, в котором осуществление работы первой группы цилиндров включает в себя этап, на котором впрыскивают топливо в первый ряд цилиндров при регулировании установки фаз клапанного распределения впускных и выпускных клапанов первой группы цилиндров на первую ...

Fremdgezündete Mehrzylinder-Brennkraftmaschine mit Teilabschaltung und Verfahren zum Betreiben einer derartigen Brennkraftmaschine

Die Erfindung betrifft eine fremdgezündete Brennkraftmaschine mit mindestens einem Zylinderkopf, der mindestens vier in Reihe angeordnete Zylinder und damit zwei außenliegende Zylinder und mindestens zwei innenliegende Zylinder umfaßt, bei der die mindestens vier Zylinder in der Art konfiguriert sind, dass sie mindestens zwei Gruppen mit jeweils mindestens zwei Zylindern bilden, wobei die zwei außenliegenden Zylinder eine erste Gruppe bilden und die mindestens zwei innenliegenden Zylinder eine zweite Gruppe bilden, deren Zylinder als lastabhängig zuschaltbare Zylinder ausgebildet sind, die bei Unterschreiten einer vorgebbaren Last abgeschaltet sind, jeder Zylinder mindestens eine Auslaßöffnung zum Abführen der Abgase aus dem Zylinder aufweist, wobei jede Auslaßöffnung mit einem Auslaßventil ausgestattet ist, das mittels Ventilbetätigungseinrichtung steuerbar ist und die Auslaßöffnung freigibt oder verschließt, sich an jede Auslaßöffnung eine Abgasleitung anschließt, und die Abgasleitungen ...

Verfahren zum Betreiben einer teilabgeschalteten selbstzündenden Brennkraftmaschine mit mindestens zwei in Reihe angeordneten Zylindern

Verfahren zum Betreiben einer teilabgeschalteten Brennkraftmaschine (7) mit mindestens zwei in Reihe angeordneten Zylindern (1, 2, 3, 4), bei der- jeder Zylinder (1, 2, 3, 4) mindestens eine Auslassöffnung aufweist, an die sich eine Abgasleitung zum Abführen der Abgase via Abgasabführsystem anschließt,- jeder Zylinder (1, 2, 3, 4) mindestens eine Einlassöffnung aufweist, an die sich eine Ansaugleitung zum Zuführen von Ladeluft via Ansaugsystem anschließt,- mindestens zwei Zylinder (1, 2, 3, 4) in der Art konfiguriert sind, dass diese mindestens zwei Gruppen mit jeweils mindestens einem Zylinder (1, 2, 3, 4) bilden, wobei der mindestens eine Zylinder (1, 4) einer ersten Gruppe ein auch bei Teilabschaltung der Brennkraftmaschine (7) in Betrieb befindlicher Zylinder (1, 4) ist und der mindestens eine Zylinder (2, 3) einer zweiten Gruppe als lastabhängig schaltbarer Zylinder (2, 3) ausgebildet ist, und- mindestens ein Ventiltrieb zum Steuern eines vier Takte umfassenden Ladungswechsels vorgesehen ...

SYSTEME UND VERFAHREN FÜR LUFT-/KRAFTSTOFF-UNGLEICHGEWICHT UND ZYLINDERDEAKTIVIERUNG

Ein Drehmomentanforderungsmodul bestimmt eine Drehmomentanforderung für einen Motor basierend auf einer Fahrereingabe. Ein Zylindersteuermodul bestimmt einen Zielbruchteil von einer Gesamtanzahl von Zylindern des Motors, die basierend auf der Drehmomentanforderung aktiviert werden. Ein Modul für Luft-/Kraftstoff-Ungleichgewicht (AFIM) ordnet selektiv an, dass das Zylindersteuermodul den Zielbruchteil anhand eines vordefinierten Anteils an der gesamten Anzahl der Zylinder des Motors, die zu aktivieren sind, festlegt. Das Zylindersteuermodul legt ferner den Zielbruchteil basierend auf dem vorbestimmten Anteil in Reaktion auf den Befehl fest und aktiviert und deaktiviert das Öffnen der Ein- und Auslassventile der Zylinder des Motors, basierend auf dem Zielbruchteil. Während der Ziel-Zündbruchteil basierend auf dem vordefinierten Bruchteil gesetzt wird, diagnostiziert das AFIM-Modul weiter selektiv das Vorhandensein eines AFIM-Fehlers basierend auf Abtastungen eines Signals von einer Lambdasonde ...

Verbrennungsmotor mit teilweiser Zylinderabschaltung beim Betrieb im unteren Lastbereich

Verbrennungsmotor (1) bestehend aus: mehreren Zylindern (2), die in eine erste Gruppe (17) der Zylinder (2) und in eine zweite Gruppe (18) der Zylinder (2) unterteilt sind, für jeden Zylinder (2) einem entsprechenden Einspritzorgan, das den Kraftstoff in den Zylinder (2) fördert, für jeden Zylinder (2) einem entsprechenden Einlassorgan, das die Verbrennungsluft in den Zylinder (2) fördert, für jeden Zylinder (2) einem entsprechenden Auslassorgan, das die Abgase aus dem Zylinder (2) abführt, und einer Steuereinheit (19), mit der nur die zur ersten Gruppe (17) der Zylinder (2) gehörenden Zylinder (2) während des Betriebs im unteren Lastbereich abgeschaltet werden können, bei dem die Zylinder (2) bzw. die entsprechenden Einspritz-, Einlass- und Auslassorgane der ersten Gruppe (17) der Zylinder (2) andere Struktureigenschaften als die Zylinder (2) bzw. die entsprechenden Einspritz-, Einlass- und Auslassorgane der zweiten Gruppe (18) der Zylinder (2) besitzen, und bei dem für jeden Zylinder ...

SYSTEM UND VERFAHREN ZUR BEIBEHALTUNG EINER TEMPERATUR EINER EMISSIONSVORRICHTUNG

Diese Offenbarung stellt ein System und ein Verfahren zur Beibehaltung einer Temperatur einer Emissionsvorrichtung bereit. Es werden Verfahren und Systeme zur Beibehaltung einer Katalysatortemperatur über einer Schwellenwerttemperatur während des Bremsens und Ausrollens des Fahrzeugs beschrieben. In einem Beispiel kann die Motorpumpenarbeit erhöht werden, ohne die Strömung kühler Frischluft durch das Abgassystem des Motors zu erhöhen, um ein gewünschtes Maß an Motorbremsung bereitzustellen. Die Nettoluftströmung durch den Motor kann durch Aktivieren eines Dekompressionsaktors verringert werden.

Verwaltung von Zündungsbruchteilen bei der Zündungsauslassungs-Motorsteuerung

In verschiedenen beschriebenen Ausführungsformen wird Zündungsauslassungssteuerung verwendet, um eine gewünschte Motorleistung zu liefern. Eine Steuereinrichtung bestimmt einen Zündungsauslassungs-Zündungsbruchteil und (gegebenenfalls) zugeordnete Motoreinstellungen, die zum Liefern einer angeforderten Leistung geeignet sind. In einem Aspekt wird der Zündungsbruchteil aus einer Menge verfügbarer Zündungsbruchteile ausgewählt, wobei die Menge verfügbarer Zündungsbruchteile als Funktion der Motordrehzahl variiert, so dass bei höheren Motordrehzahlen mehr Zündungsbruchteile verfügbar sind als bei niedrigeren Motordrehzahlen. Sodann dirigiert die Steuereinrichtung die Zündungen auf eine Zündungsauslassungs-Weise, die den ausgewählten Bruchteil der Zündungen liefert. In anderen Ausführungsformen ist die Zündungsauslassungs-Steuereinrichtung dazu angeordnet, einen Basis-Zündungsbruchteil zu wählen, der eine sich wiederholende Zündzykluslänge hat, die sich bei der gegenwärtigen Motordrehzahl mindestens ...

System und Verfahren zur sicheren Ventilaktivierung in einer Kraftmaschine mit dynamischer Zündaussetzung

Es werden viele verschiedene Verfahren und Vorrichtungen zum Steuern des Betriebs der Einlass- und Auslassventile in einer Brennkraftmaschine während eines Zündaussetzbetriebs beschrieben. In verschiedenen Ausführungsformen wird eine Auslassventil-Überwachungseinrichtung oder ein anderer geeigneter Mechanismus verwendet, um Auslassventil-Betätigungsfehler zu detektieren. Wenn ein Auslassventil-Betätigungsfehler für einen speziellen Zylinder detektiert wird, wird das entsprechende Einlassventil unter Umständen deaktiviert (oder nicht aktiviert), unter denen es ansonsten aktiviert werden würde, um zu verhindern, dass sich das Einlassventil in einen Zylinder öffnet, der Hochdruck-Verbrennungsgase enthält. Die beschriebene Methode ist insbesondere vorteilhaft, wenn ein Zündaussetzbetrieb mit einer Zylinderdeaktivierung kombiniert wird, so dass Luft nicht durch die Zylinder während der ausgelassenen Arbeitszyklen gepumpt wird.

VERFAHREN UND VORRICHTUNG ZUM REGELN VON VERBRENNUNGSMODUSÜBERGÄNGEN IN EINEM VERBRENNUNGSMOTOR

Ein Verbrennungsmotor umfasst zweistufige variable Hubsteuermechanismen, die ausgebildet sind, um die Größe eines Ventilshubs von Einlass- und Auslassventilen auf eine von zwei diskreten Stufen zu steuern, die Ventilöffnungspositionen mit niedrigem Hub und Ventilöffnungspositionen mit hohem Hub umfassen. Ein Verfahren zum Betreiben des Motors umfasst, dass ein Wechsel von einem ersten Verbrennungsmodus in einen zweiten Verbrennungsmodus angewiesen wird. Während des Anweisens des Wechsels wird ein Schließen mehrerer sekundärer Drosselventile ausgelöst, die ausgebildet sind, um eine Einlassluftströmung zu mehreren Einlasskanälen stromaufwärts mehrerer Einlassventile zu steuern. Positionen der mehreren sekundären Drosselventile werden anschließend eingestellt, um eine bevorzugte Luftladung zu erreichen. Die zweistufigen variablen Hubsteuermechanismen werden anschließend angewiesen, von einer ersten der zwei diskreten Stufen auf eine zweite der zwei diskreten Stufen umzuschalten.

Verfahren zum Betreiben einer Brennkraftmaschine sowie entsprechende Brennkraftmaschine

Die Erfindung betrifft ein Verfahren zum Betreiben einer Brennkraftmaschine (1), wobei zum Einleiten einer Zylinderabschaltung mindestens eines Zylinders (2) der Brennkraftmaschine (1) wenigstens ein Einlassventil (3) und wenigstens ein Auslassventil (4) des mindestens einen Zylinders (2) geschlossen werden. Dabei ist vorgesehen, dass während der Zylinderabschaltung des mindestens einen Zylinders (2) zum Vermeiden eines Unterdrucks in dem mindestens einen Zylinder (2) das wenigstens eine Einlassventil (3) temporär derart geöffnet wird, dass Frischgas in den mindestens einen Zylinder (2) einströmt. Die Erfindung betrifft weiterhin eine Brennkraftmaschine (1).

VERFAHREN UND SYSTEM ZUM EINSTELLEN VON MOTORKLOPFHINTERGRUNDGERÄUSCHPEGELN

Diese Offenbarung stellt ein Verfahren und System zum Einstellen von Motorklopfhintergrundgeräuschpegeln bereit. Es werden Verfahren und Systeme zum Betreiben eines Motors mit variablem Hubraum bereitgestellt, der ein Klopfsteuersystem beinhaltet. Motorklopfhintergrundgeräuschpegel, die während eines Modus mit allen arbeitenden Zylindern bestimmt werden, können angewandt werden, wenn ein oder mehrere Zylinder abgeschaltet sind, um das Vorhandensein oder die Abwesenheit von Motorklopfen zu bestimmen. Zusätzlich können Motorklopfhintergrundgeräuschpegel, die während eines Modus mit allen arbeitenden Zylindern bestimmt werden, angewandt werden, wenn ein oder mehrere Zylinder erneut angeschaltet sind, sodass der Motor arbeitet, während alle Zylinder verbrennen, sodass die Möglichkeit für das Angeben von Klopfen, wenn kein Klopfen vorhanden ist, vermieden werden kann.

Verbrennungsmotor mit schaltbaren Auslassventilen

Die Erfindung betrifft ein Verfahren zum Betreiben eines Verbrennungsmotors (10) in Abhängigkeit von einem Lastmodus (100, 200), wobei der Verbrennungsmotor wenigstens zwei Zylinder (1, 2, 3, 4) mit jeweils einem ersten (R) und einem zweiten (L) Auslassventil aufweist, und wobei das Verfahren zumindest die folgenden Schritte aufweist: Aktivieren aller Auslassventile (R, L) der Zylinder in einem Hochlastmodus (200), und Aktivieren des ersten Auslassventils (R) und Deaktivieren des zweiten Auslassventils (L) eines, mehrerer oder aller Zylinder (1, 2, 3, 4) in einem Teillastmodus (200). Die Erfindung betrifft ferner einen Verbrennungsmotor, eine Antriebsanordnung und ein Kraftfahrzeug, jeweils betrieben nach einem solchen Verfahren.

Steuereinheit und Verfahren zum Betrieb eines Hybridantriebs mit einem Schleppmoment-reduzierten Verbrennungsmotor

Es wird eine Steuereinheit für einen Hybridantrieb beschrieben, der einen Verbrennungsmotor und eine elektrische Maschine umfasst. Die Steuereinheit ist eingerichtet, zu veranlassen, dass ein oder mehrere Schleppmoment-reduzierende Maßnahmen des Verbrennungsmotors in Vorbereitung auf eine Befeuerung des Verbrennungsmotors beendet werden. Außerdem ist die Steuereinheit eingerichtet, die elektrische Maschine zu veranlassen, eine durch das Beenden der ein oder mehreren Schleppmoment-reduzierenden Maßnahmen bewirkte Erhöhung des Schleppmoments des Verbrennungsmotors zumindest teilweise zu kompensieren.

SYSTEM UND VERFAHREN ZUM BETREIBEN EINES MOTORS, DER EINEN KRAFTSTOFFDAMPFBEHÄLTER BEINHALTET

Systeme und Verfahren zum Betreiben eines Motors, der einen Behälter zum Speichern von Kraftstoffdämpfen beinhaltet, sind offenbart. In einem Beispiel werden ein oder mehrere Motorzylinder als Reaktion auf ein Niveau von in einem Kraftstoffdampfspeicherbehälter gespeicherten Kraftstoffdämpfen abgeschaltet, wenn Schubabschaltbedingungen erfüllt sind. Indem ein oder mehrere Motorzylinder mit geschlossenen Einlass- und Auslassventilen abgeschaltet werden, kann es möglich sein, in Motorzylinder gesaugte Kraftstoffdämpfe zu reduzieren, um die Möglichkeit von Zylinderfehlzündung zu reduzieren.

MOTOR MIT VARIABLEM HUBRAUM EINSCHLIEẞLICH UNTERSCHIEDLICHER NOCKENERHEBUNGSPROFILE

Es werden Verfahren und Systeme für einen Motor bereitgestellt, der Nocken beinhaltet, die unterschiedliche Erhebungsprofile aufweisen. In einem Beispiel treiben Nocken einer ersten Nockengruppe eine Vielzahl von abschaltbaren Zylinderventilen an und treiben Nocken einer zweiten Nockengruppe eine Vielzahl von nicht abschaltbaren Zylinderventilen an. Die Nocken der ersten Nockengruppe beinhalten in Bezug auf Nocken der zweiten Nockengruppe ein anderes Erhebungsprofil.

Brennstoffabschaltung im Schubbetrieb

Verfahren und Einrichtung zur Regelung des Zylindermoments einer Brennkraftmaschine mit elektromagnetisch betriebenen Ventilen

Zündanordnung und Verbrennungsmotor

Es wird eine Zündanordnung 1 für einen Verbrennungsmotor 2 mit einer Vorbrennkammer 3 bereitgestellt, wobei die Vorbrennkammer 3 Verbindungseinrichtungen 4 zur direkten fluidleitenden Verbindung zwischen der Vorbrennkammer 3 und einem Einlasskanal 5 und/oder einem Auslasskanal 6 einer Hauptbrennkammer 7 des Verbrennungsmotors 2 aufweist.Außerdem wird eine weitere Zündanordnung 1 für einen Verbrennungsmotor 2 mit einer Vorbrennkammer 3 bereitgestellt, wobei die Vorbrennkammer 3 mindestens eine erste, eine zweite und eine dritte Gruppe A, B, C von Öffnungen 9 zur fluidleitenden Verbindung zwischen der Vorbrennkammer 3 und einer Hauptbrennkammer 7 des Verbrennungsmotors 2 aufweist.Zudem betrifft die Erfindung einen Verbrennungsmotor 2 mit einer solchen Zündanordnung 1.

Ölversorgungskreislauf-Vorrichtung für ein Zylinder-Deaktivierungssystem

Ölversorgungskreislauf-Vorrichtung für ein Zylinder-Deaktivierungssystem mit einer einfachen Bauweise und geeignet, an einem Zylinderkopf ohne den Bedarf zusätzlicher, außerordentlicher Teile installiert zu werden, in dem eine Ölleitung in einem hohlen Raum einer Nockenwelle gebildet wird, aufweisend: eine Hydraulikpumpe (240); eine Mehrzahl von Ventilstößeln (130) zur Steuerung der Öffnung von Einlass- und Auslassventilen; einen ersten Öl-Kreislauf (280), der mit der Hydraulikpumpe (240) über eine Ölversorgungs-Leitung in Verbindung steht und der Öl hohen Druckes in die Ventilstößel (130) zuführt; und einen zweiten Öl-Kreislauf (270), der mit der Hydraulikpumpe (240) in Verbindung steht und der Öl an die Ventilstößel (130) zuführt, wobei der zweite Öl-Kreislauf (270) eine in einem hohlen Raum einer Nockenwelle gebildet ist.

Elektrohydraulische Ventilabschaltung in einer Brennkraftmaschine, Verteilereinheit hierzu und Herstellungsmethode derselben

Internal-combustion engine, has detachable cylinder, and controlling device for controlling multiple detachable valves in function of outlet valves and inlet valves of detachable cylinder

The internal-combustion engine has a detachable cylinder, and controlling device for the controlling multiple detachable valves in the function of outlet valves and inlet valves of the detachable cylinder. The controlling device controls the valve of the detachable cylinder in an adapted valve detachable operating mode. The four combustion stroke do not process directly on each other in a continuous manner, but an intake cycle is partly produced or an exhaust cycle is partly downstream. An independent claim is also included for a method for controlling an internal-combustion engine with a cylinder with detachable inlet valves and outlet valves.

Momentenneutrale Zylinderabschaltung durch Deaktivierung von Gaswechselventilen

Vorgestellt wird ein Verfahren zum Wechsel zwischen Vollmotorbetrieb und Teilmotorbetrieb eines mehrzylindrigen Verbrennungsmotors, bei dem wenigstens die Einlassventile oder die Auslassventile eines Zylinders oder einer Gruppe von Zylindern im Vollmotorbetrieb aktiviert und im Teilmotorbetrieb deaktiviert sind, wobei in einem ersten Schritt eine Drosselung der Leistung der zu deaktivierenden Zylinder und gleichzeitig eine Erhöhung der Leistung der anderen Zylinder so erfolgt, das das vom Motor abgegebene Gesamtmoment einem vorgegebenen Motorsollmoment folgt und wobei in einem zweiten Schritt eine Abschaltung der gedrosselten Zylinder über die schaltbaren Ein- oder Auslassventile erfolgt. Dieses Verfahren vermeidet unerwünschte Änderungen des vom Motor abgegebenen Gesamtdrehmomentes. Die Erfindung richtet sich auch auf eine Vorrichtung zur Durchführung der Verfahren.

An engine valve deactivation system

An engine valve deactivation system for an engine 6 having two or more cylinders C1, C2, C3, each cylinder having two exhaust valves and two inlet valves, at least one cylinder being deactivatable, wherein each deactivatable cylinder has one inlet valve selectively deactivated by means of a first supply of pressurised fluid, and both exhaust valves and the other of the inlet valves selectively deactivated by means of a second supply of pressurised fluid. Preferably two devices, S3, D3, for example hydraulic lash adjusters or roller finger followers, each controlled by an electronically controlled valve, 15, 16, selectively deactivate the first inlet valve and the other inlet valve and both exhaust valves respectively, the first device activated when increased swirl is required in the respective cylinder and both devices activated when complete deactivation of the respective cylinder is required. Also claimed is a motor vehicle having an engine comprising the valve deactivation system. The ...

A method and system for a variable displacement engine

Method of starting an internal combustion engine

Multi-cylinder internal combustion engine with valve shut-off means

A multicylinder internal combustion engine with valve disconnection wherein an intermediate mechanical device is interposed between an end of the valve stem end and a valve actuating mechanism with the intermediate mechanical device arbitrarily serving, in one case, as a rigid intermediate member between the end of the valve stem and the valve actuating mechanism and, in another case, in a closed setting of the valve, abolishes or eliminates the interconnection between the end of the valve stem and the valve actuating means.

CONTROL DEVICE FOR HYBRID VEHICLE

PROCEDURE FOR THE TORQUE REGULATION

PROCEDURE AND DEVICE FOR THE OPERATION OF A MEHRZYLINDRIGEN FOREIGNIGNITED FOUR-CYCLE INTERNAL-COMBUSTION ENGINE WITH CYLINDER DISCONNECTION

MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

Die Erfindung betrifft eine Mehrzylinder-Brennkraftmaschine (1) mit zumindest einem ersten Zylinder (2) oder einer Gruppe von ersten Zylindern (2) und zumindest einem zweiten Zylinder (3) oder einer Gruppe von zweiten Zylindern (3), wobei der zumindest eine erste Zylinder (2) bzw. die Gruppe von ersten Zylindern (2) mittels zumindest einer Zylinderabschalteinrichtung (4) deaktivierbar ist, und wobei ein Verdichtungsverhältnis zumindest eines Zylinders mittels zumindest einer Verdichtungsänderungseinrichtung (5) veränderbar ist. Um einen wirkungsgradoptimalen Betrieb der Brennkraftmaschine auf möglichst einfache Weise zu ermöglichen, ist vorgesehen, dass das Verdichtungsverhältnis des bzw. der ersten Zylinder (2) unveränderbar und das Verdichtungsverhältnis des bzw. der zweiten Zylinder (3) veränderbar ist.

MOMENT-NEUTRAL CYLINDER DISCONNECTION BY DEACTIVATION OF GAS SHUTTLE VALVES

CYLINDER DE-ACTIVATOR VALVE ASSEMBLY

VALVE STOP MECHANISM

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

An IIS system (2) that performs control related to intermittent stopping of engine operation by idling stop control is applied to an internal combustion engine including a VVT mechanism (6) that makes the valve timing of an engine valve variable and has an intermediate lock mechanism (18) that mechanically locks the valve timing at an intermediate lock position between a most retarded position and a most advanced position. The IIS system (2) is configured to inhibit the engine operation from being intermittently stopped at the occurrence of a failure of the VVT mechanism (6) to avoid the internal combustion engine from being prevented from being restarted after the intermittent stop depending on the occurrence of the failure of the VVT mechanism (6).

Als Motorenbremse benutzbarer Mehrzylinder-Viertaktmotor für Fahrzeuge.

Drive unit for the operation of a vehicle.

Die Erfindung betrifft Anordnung und Regelung eines luftaufgeladenen Parallel-Hybridantriebes für Fahrzeuge mit Abgasturbine. Die Antriebseinheit beinhaltet: Eine über Kupplung (21) und Getriebe (22) mit der Antriebswelle (23) verbundene, unbestimmte Verbrennungskraftmaschine (2) mit Ladeluftkompression, ferner einen parallel mit der Antriebswelle (23) mechanisch permanent verbundenen Elektromotor/Generator (25), darüber hinaus eine ausschliesslich einen Stromgenerator (30) antreibende Abgasnutzturbine (26), und ferner einen rein elektrisch betriebenen Ladeluftverdichter (16). Ein Steuergerät (32) kontrolliert als zentrale Steuer- und Regeleinrichtung Strom-, Kraft-, Brennstoff- und Luftflüsse basierend auf Sensorsignalen, charakteristischen Kennlinien wie auch direkten (79) und indirekten (35, 36, 37) Vorgaben des Fahrzeuglenkers. Die Regelung steuert im Weiteren spezielle Bremsbetriebe zwecks Energierückgewinnung und erlaubt mittels Bedienelementen (79) die willkürliche Lastverteilung ...

Drive unit for the enterprise of a vehicle.

Eine Antriebseinheit (1) für den Betrieb eines Fahrzeuges ist mit a) einer eine Antriebswelle (20) antreibenden, mit Ladeluft aufladbaren Verbrennungskraftmaschine (2) versehen, b) einer der Verbrennungskraftmaschine (2) nachgeschalteten Abgas-Nutzturbine (26) zum Betrieb eines elektrischen Generators (30), c) dessen (30) erzeugter Strom in eine, vorzugsweise aus einem externen Stromnetz, z.B. über einen Gleichrichter (76), aufladbaren, Batterie (31) zur zwischenzeitlichen Speicherung einspeisbar ist, und d) einem mit dem vom Generator (30) erzeugten Strom betreibbaren Elektromotor (25), e) der mit der Antriebswelle (20) über ein Getriebe (22) verbunden ist. Erfindungsgemäss ist das Untersetzungsgetriebe (22) f) eines mit variablen Abgangsdrehzahlen, g) dem Getriebe (22) ist ein Kupplungsglied (21) zugeschaltet, h) die Ladeluft für die Verbrennungskraftmaschine ist von einem mittels eines weiteren Elektromotors (17) antreibbaren Fördermittel (16), vorzugsweise einem Verdrängerverdichter ...

Verfahren zum Betrieb einer Verbrennungskraftmaschine mit einem gasförmigen Kraftstoff sowie Verbrennungskraftmaschine.

Die Erfindung betrifft ein Verfahren zum Betrieb einer Verbrennungskraftmaschine mit mindestens zwei Zylindern und einem System zur Kraftstoff-Einspritzung, bei dem der Kraftstoff aus einem Primärtank entnommen und unter einer gegenüber dem atmosphärischen Druck deutlich verdichteten Form einem Rail 2 zugeführt wird und mehrere Zylinder den gasförmigen Kraftstoff aus einem gemeinsam genutzten Rail 2 beziehen, dadurch gekennzeichnet, dass der Druck-Sollwert des im Rail 2 gespeicherten gasförmigen Kraftstoffs während des Betriebes der Verbrennungskraftmaschine unabhängig vom Motorbetriebspunkt auf einen konstanten Wert oder einen variablen Sollwert, der sich nur in einer geringen Bandbreite B ändert, geregelt oder anderweitig gehalten wird.

Verfahren zum Betrieb einer aufgeladenen Verbrennungskraftmaschine sowie Vorrichtung zur Bereitstellung von Verbrennungsluft für eine aufgeladene Verbrennungskraftmaschine.

Die Erfindung betrifft ein Verfahren zum Betrieb einer aufgeladenen Verbrennungskraftmaschine mit wenigstens einer Zylindergruppe mit einer Anzahl n von Brennräumen (21), wobei während eines ersten Betriebszustandes alle n Brennräume (21) mit Verbrennungsluft über einen primären Ladeluftpfad (22, 24A) versorgt werden und während eines zweiten Betriebszustandes nur ein Teil der n Brennräume (21) aus dem primären Ladeluftpfad (22, 24A) und ein anderer Teil der n Brennräume (21) aus einem gesonderten Druckluftspeicher (2) mit Verbrennungsluft versorgt werden.

Vehicle travel control device

Control a transition between hcci and si combustion

A method to operate a multi-cylinder direct-injection engine in one of a controlled auto-ignition and a spark-ignition combustion mode is described. Engine operation and an operator torque request are monitored. Fuel delivery to a portion of the cylinders is selectively deactivated and torque output from non-deactivated cylinders is selectively increased to achieve the operator torque request when the monitored engine operation is above a predetermined threshold. An engine operating point at which an engine load demand exceeds an operating capability of the engine in a stoichiometric HCCI mode is identified. The engine is selectively operated in an unthrottled spark-ignition mode with at least one cylinder unfueled and torque output from the remaining cylinders is selectively increased.

For cylinder deactivation of the variable valve timing

Pressurized in-line variable displacement engine

Firing fraction management in skip fire engine control

Hybrid powertrain having an electrically variable transmission and engine valve control

SYSTEM OF MOTORIZATION OF MOTOR VEHICLE

DISPOSITIF DE COMMANDE DE SOUPAPES D'UN MOTEUR A COMBUSTION INTERNE PAR CULBUTEURS DESACTIVABLES

CHAQUE CULBUTEUR 3 COMPORTE DEUX TRONCONS 6, 7 JUXTAPOSES AYANT DES MOYENS DE BUTEE 14, 15 DESTINES A COOPERER ENTRE EUX POUR L'ACTIONNEMENT DE LA SOUPAPE. UN RESSORT TEND A ECARTER LES MOYENS DE BUTEE 14, 15. LE PREMIER TRONCON 6 EST EN APPUI SUR LA CAME 9 ET MONTE ROTATIF SUR UNE BAGUE EXCENTREE 10 ACCOUPLEE A L'AXE 1 SUR LEQUEL EST MONTE LE CULBUTEUR 3 PAR L'INTERMEDIAIRE D'UN RESSORT D'ARMEMENT 20. LA ROTATION DE L'AXE 1 DANS UN SENS OU DANS L'AUTRE ENTRAINE LA ROTATION DE LA BAGUE EXCENTREE 10 POUR LA METTRE DANS L'UNE OU L'AUTRE DE DEUX POSITIONS STABLES CORRESPONDANT A L'ETAT ACTIVE OU DESACTIVE DU CULBUTEUR3.

CONTROL DEVICE Of ACTUATION OF the VALVES Of an INTERNAL COMBUSTION ENGINE

METHOD FOR IMPLEMENTING A HYBRID VEHICLE AND HYBRID VEHICLE WITH A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE COUPLED TO AN ELECTRIC MACHINE

IMPROVEMENT OF the DEVICES Of ACTUATION OF VALVE HAS POSSIBILITY OF DESACTIVATION AND MEANS OF LOCKING Of SUCH a DEVICE.

On propose, selon l'invention, un dispositif d'actionnement d'au moins une soupape d'un moteur à combustion interne comportant un support (12) et au moins un élément d'actionnement (2) qui est monté pivotant et/ou coulissant par rapport au support (12) et qui repose par un premier appui (4) sur la soupape et par un deuxième appui (5) sur une butée (7), caractérisé en ce que la butée (7) comporte : a. une tige (11) montée pour coulisser par rapport au support (12) et pourvue d'un sommet (22) en contact avec l'élément d'actionnement (2) ; b. un ressort 18 d'appui de la tige (11) sur l'élément d'actionnement (2) et ; c. des moyens de verrouillage (28, 26) de la tige (11) en position par rapport au support (12) actionnés par un actionneur électromagnétique.

Engine valve gear rocker arm disconnecting mechanism - includes sliding fork to disengage rocker arm from cam operated ratchet member

SYSTEM OF ORDERING AND INHIBITOR OF VALVE FOR INTERNAL COMBUSTION ENGINE

VARIABLE VALVE SYSTEM

CYLINDER DEACTIVATION CONTROL METHOD AND CYLINDER DEACTIVATION ENGINE CONTROLLED BY THEROF

METHOD FOR COMPENSATING A GAS SPRING ACTION IN THE CASE OF CYLINDER SHUTOFF WITH EXHAUST GAS INCLUSION

METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE WITH CYLINDER SHUTDOWN

A method and a device for operating an internal combustion engine (1), in particular, in a non-firing condition, are disclosed which permit an essentially smooth switch between two operating conditions for the internal combustion engine (1) with differing numbers of operating cylinders (11, 12,..., 18) with regard to charge exchange. Air is introduced into the internal combustion engine through a control element (5) in an air inlet (10) and the amount of air introduced into the internal combustion engine (1) controlled by the position of the control element (5). A charge exchange condition for at least one cylinder (11, 12,..., 18) of the internal combustion engine (1) is altered. On altering the charge exchange condition of the at least one cylinder (11, 12,..., 18) the setting of the control element (5) in the air inlet (10) is altered. © KIPO & WIPO 2008 ...

ENGINE SYSTEM

According to an embodiment of the present invention, an engine system comprises: an engine including a plurality of combustion chambers generating a driving force by combustion of fuel; a cylinder deactivation (CDA) device mounted in a part or all of the combustion chambers to selectively stop the part of the combustion chambers; a first exhaust manifold connected to a group of the chamber groups among the combustion chambers; a second exhaust manifold connected to the other group of the combustion chambers among the combustion chambers; a turbocharger including a turbine rotated by exhaust gas discharged through the first exhaust manifold, and a compressor rotated in conjunction with the turbine to compress outdoor air; and an electric supercharger including a motor and an electric compressor operated by the motor to supply supercharged air to the combustion chambers, wherein a compression ratio of the group of the combustion chambers connected to the turbocharger and a compression ratio ...

Control device for hybrid vehicle

A control device for a hybrid vehicle is provided that can prevent fuel consumption from deteriorating by preventing a battery from tending to discharge if a failure such as being unable to operate a deceleration cylinder deactivation system occurs. In the control device for a hybrid vehicle comprising an engine and a motor as its drive sources, which stops the fuel supply to the engine at the time of vehicle deceleration, and performs regenerative braking by the motor depending on the deceleration state, in which the engine is a cylinder deactivation engine capable of switching between all cylinder operation for operating all cylinders and cylinder deactivation operation for deactivating at least one or more cylinders, the cylinder deactivation operation is conducted during deceleration state of the vehicle to reduce pumping losses of the engine so that the regeneration efficiency of the motor is improved and the control device further comprises an abnormality detection device which detects ...

DIESEL ENGINE

The present invention is provided with: a first and a second turbocharger (16A, 16B) that perform supercharging respectively for a first cylinder group and a second cylinder group, the operations of which are continued or stopped by means of a cylinder-reduction-use valve-stopping mechanism (21); and a third turbocharger (26) that supplies the air (A) from these two turbochargers (16A, 16B) to the first and second cylinder groups through separate intake passages (12A, 12B), and that performs supercharging of the two turbochargers (16A, 16B). Thus, when a reduced-cylinder operation system, which is equipped with a valve-stopping mechanism that temporarily stops the intake/exhaust valves, is provided in addition to a turbocharging system, a decrease in the supercharging amount can be prevented during reduced-cylinder operation and a sufficient amount of air can be supplied to the operating cylinders, so that deterioration of combustion in the operating cylinders and deterioration of the exhaust ...

MECHANICALLY CONTROLLABLE VALVE TRAIN ASSEMBLY, INTERNAL COMBUSTION ENGINE AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE

The invention relates to a mechanically controllable valve train assembly for an internal combustion engine comprising at least two cylinders (4, 6) which respectively comprise at least one gas inlet valve (8, 10) and at least one gas outlet valve. At least one transmission arrangement (18, 20) is provided such that at least one intermediate lever arrangement (22, 24) and a swivel lever arrangement (26, 28) is associated with each gas inlet valve (8, 10). An intermediate lever (30, 32) of the intermediate lever arrangement (22, 24) comprises a working curve (38, 40) for cooperating with a swivel lever (46, 48) of the swivel lever arrangement (26, 28). The intermediate lever (30, 32) is operatively connected to a peripheral contour (14, 16) of a camshaft (12) and the intermediate lever arrangement (22, 24) comprises an engagement element (64, 66) which is operatively connected to a control contour (60, 62) of a valve stoke adjusting device (58) such that different valve strokes can be adjusted ...

ENGINE CONTROL WITH VALVE OPERATION MONITORING USING CAMSHAFT POSITION SENSING

A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include monitoring valve operation by analyzing camshaft position to detect valve operation inconsistent with a current cylinder state (activated or deactivated) and controlling the engine in response to detecting the inconsistent operation. The camshaft position may be used to produce a surrogate signal indicative of intake/exhaust valve lift generated using camshaft sensor tooth deviation relative to an expected or reference tooth position for a corresponding crankshaft position and compared to a corresponding threshold. The surrogate signal indicative of valve lift may also be generated by pattern matching or correlation of one or more reference tooth position patterns to a measured or inferred tooth position pattern.

Multi-stroke cylinder operation in an internal combustion engine

A system and method to control engine valve timing to during the start of an internal combustion engine. Valves that may be deactivated are controlled in a manner to reduce hydrocarbon emissions during the start of an internal combustion engine.

Control apparatus for internal combustion engine

During a cylinder cut-off operation in which fuel injection for a part of cylinders is halted and the engine is run with the remaining cylinders, a variable valve operation mechanism of the halted cylinder which fuel injection is halted is controlled based on an operating state of the engine whereby the engine vibration is reduced during the cylinder cut-off operation. The variable valve operation mechanism may be controlled based on a maximum internal pressure of a combustion cylinder which fuel injection is continued during the cylinder cut-off operation.

Method for cylinder cut-in in an internal combustion engine process

A method for cylinder cut-in in an internal combustion engine, with the engine having on a portion of its cylinders. The charge changing valves can be cut out as well as a switchable fuel supply, both of which can be switched from a cut-out or cut-off state to a cut-in state and vice versa. In order to provide a method for cylinder cut-in that permits a safe transition from operation in which they are cut out to one in which they are not cut out, and by which the effects of this switch are exhaust behavior are minimized, the charge changing valves are cut in first and then, after checking to determine whether the charge changing valves have been switched, the fuel supply is cut in to the cylinders that were previously cut out.

Engine control to compensate for fueling dynamics

A method for calculating transient fuel wall wetting characteristics of an operating engine is described. The method accounts for cylinder valve deactivation of cylinders in the engine in calculating the dynamic fueling compensation. In one example, fuel vaporization effects from fuel puddles in deactivated cylinders is considered when calculating the fueling compensation for active cylinders.

Method and system for exhaust catalyst warming

Methods and systems are provided for leveraging engine skip-fire operation during an engine cold-start to expedite catalyst heating. Based on the heat flux required, the engine may be operated with a group of cylinders selectively deactivated, with spark retard on remaining active cylinders increased, and with engine speed increased to reduce NVH issues during the skip-fire operation. The combination of parameters may be adjusted based on changes in exhaust temperature and NVH limits of the engine.

Method for controlling the operation of a cylinder for an internal combustion engine

The invention relates to a method for controlling the operation of a cylinder for a multi-cylinder four-stroke internal combustion engine, wherein said cylinder interacts with at least one fuel injector, an intake valve, an exhaust valve, operation members for controlling the opening of the valves according to a cycle running and means driven by an engine control computer according to the predetermined operation conditions of the engine for selectively opening or closing said cylinder valves, wherein the deactivation of the valves is carried out simultaneously in the middle of a cycle at a time approximately coinciding with the middle of a time extending between the theoretical consecutive opening times of the intake (OI) and the exhaust (OE) valves.

MANAGING TORQUE DELIVERY DURING DYNAMIC FUEL MANAGEMENT TRANSITIONS

An engine control system, vehicle system, and method are provided that are arranged to direct dynamically fuel management of an engine. The engine is operated a first firing fraction, a first cam phase, and a first throttle control position. A desired second firing fraction and a desired second cam phase are then determined. A torque request and a throttle area are determined. Further, a desired second throttle control position is determined based on at least the throttle area, the torque request, the desired second firing fraction, and the desired second cam phase. The method, control system, and vehicle system are configured to transition from the first firing fraction to the desired second firing fraction while transitioning from the first throttle control position to the desired second throttle control position. As such, delivered torque can be accurately controlled without the need for spark retard during the transition between firing fractions.

TORSIONAL-VIBRATION DAMPING SYSTEM FOR A VEHICLE DRIVE TRAIN

A drive train is disclosed that includes an engine operable in a first engine operating state and a second engine operating state and a torsional-vibration damping system operatively connected to the engine. The torsional-vibration damping system includes a first torsional-vibration damper having a primary inertial mass and a secondary inertial mass, a second torsional-vibration damper, a first centrifugal pendulum arranged on the secondary inertial mass of the first torsional-vibration damper, and a second centrifugal pendulum arranged on the second torsional-vibration damper.

SYSTEMS AND METHODS FOR REDUCING VEHICLE EMISSIONS

Methods and systems are provided for reducing release of undesired emissions to atmosphere at a start event of an engine configured to propel a vehicle. In one example, a method comprises providing an alternative heat source and actively routing heat from the alternative heat source to a heated exhaust gas oxygen sensor for which a heating element configured to raise temperature of the sensor is known to be degraded. In this way, a desired air-fuel ratio may be attained during engine start events where the heating element for raising temperature of the sensor is degraded, which may thus reduce tail-pipe emissions which may otherwise be released in the absence of such mitigating action.

THERMAL MANAGEMENT VIA EXHAUST GAS RECIRCULATION

Methods and systems of recirculating exhaust gas in internal combustion engines are disclosed. An internal combustion engine includes a set of cylinders, an intake system disposed in fluid providing communication with the set of cylinders, an exhaust system disposed in fluid exchanging communication with the set of cylinders, and a controller. In response to a detected recirculation condition, the controller prevents fluid communication between the intake system and a subset of the set of cylinders and recirculates exhaust gas between the subset of the set of cylinders and the exhaust system.

ENGINE CONTROL IN FUEL AND/OR CYLINDER CUT OFF MODES BASED ON INTAKE MANIFOLD PRESSURE

Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (DCCO) state and an operational state are described. In one aspect, transitions from DCCO may begin with reactivating cylinders to pump air to reduce the pressure in the intake manifold prior to firing any cylinders. The number of pumping cycles, if any, is based on intake manifold absolute pressure (MAP). 1. A controller configured to control operation of an engine in a vehicle , the controller configured to:deactivate all working chambers of the engine in a cylinder cut off mode such that none of the working chambers are fired and no air is pumped through the working chambers from an air intake manifold to an exhaust system of the vehicle;determining when the operation of the engine is to transition from the cylinder cut off mode to a second operational mode in response to an input to the controller;measure intake manifold absolute pressure (MAP) in the air intake manifold; andif the measured MAP is larger than a threshold MAP:determine, based on the measured MAP, a number of working cycle(s) needed to pump down the measured MAP to below the threshold MAP;operate the engine so as to pump air from the air intake manifold to the exhaust system through one or more of the working chambers of the engine for the determined number of working cycle(s); andoperate the engine in the second operational mode after the pumping of the air for the determined number of working cycle(s).2. The controller of claim 1 , further configured to receive the measured MAP from a sensor provided in or adjacent to the air intake manifold.3. The controller of claim 1 , further configured to determine the number of working cycle(s) based on one or more of the following factors:the MAP prior to pumping;the threshold MAP;relative size of the air intake manifold compared to the working chambers of the engine;intake and exhaust valve timing;engine speed; and/orrate of air leakage past a throttle arranged to ...

SYSTEM AND METHOD FOR DIAGNOSING A VARIABLE DISPLACEMENT ENGINE

Systems and methods for determining operation of a cylinder deactivating/reactivating device are disclosed. In one example, a direction of engine rotation is selected to maximize air flow through the engine while the engine is rotated without combusting air and fuel. Operation of one or more cylinder valve deactivating mechanisms is assessed while the engine is rotated without combusting air and fuel.

Valvetrain with variable valve actuation

A method of providing a rocker arm set for a valvetrain includes providing a first intake rocker arm, a second intake rocker arm and a first exhaust rocker arm. The first intake rocker arm is configured as a switching rocker arm for a first intake valve on a first cylinder. The second intake rocker arm is for a second intake valve on a second cylinder. The second rocker arm is configured to operate in a normal Otto cycle mode. The first exhaust rocker arm is provided for a first exhaust valve on the second cylinder. The first intake rocker arm operates in one of an LIVC or EIVC mode where the first intake rocker arm is configured to open or close at a different time compared to the second intake valve. The first exhaust rocker arm operates in a cylinder deactivation mode.

METHOD FOR CONTROLLING ACTUATION OF VALVES IN ENGINE WITH TURBOCHARGER

DRIVE DEVICE WITH ELECTRONIC CIRCUIT

A method for detecting an abnormality in a hybrid vehicle. The hybrid vehicle includes an engine (E) that can run in a cylinder cut-off state where intake and exhaust valve lifts are made zero, and a motor/generator (M·G) that functions as both a motor and a generator. The vehicle travels by means of the power of at least one of the engine and the motor/generator and carries out regenerative braking by the motor/generator while running the engine in a cylinder cut-off state during deceleration. When detecting an abnormality in a negative intake pressure sensor (9) or an EGR control valve (5) based on the negative intake pressure of the engine, the engine is prohibited from running in a cylinder cut-off state even during deceleration, thus generating a negative intake pressure and thereby enabling the abnormality detection to be carried out without any problems.

METHOD FOR THE REGENERATION OF A SOOT PARTICLE FILTER

INTERNAL COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To provide an internal combustion engine wherein a strong swirl can be produced by increasing an intake-air flow for swirl generation with a simple structure. SOLUTION: The internal combustion engine is provided with a cylinder head 2 in which an intake port 6 having a 1st port 61 and a 2nd port 62 is formed. In a combustion chamber 5, when a 2nd intake valve 82 for opening/closing the 2nd port 62 is put in a suspension state by a valve suspension mechanism 40, a swirl S is generated by intake air let in from the 1st port 61. In a 1st intake port 61a, a line of intersection of a 1st plane including the 1st intake port 61a and a 1st orthogonal plane Pb1 inclines upward as it approaches from a position close to the outside periphery of the combustion chamber 5 to a 2nd base plane Pc2. Further, the 1st port 61 has a port section 61c of a passage shape along nearly a vertical line L3 intersecting orthogonally the 1st plane Pa1 in a plan view upstream of the 1st intake ...

Variable Geometry Cam Shafts For Multiple-Cylinder Internal Combustion Engines

A method of conserving fuel in the operation of multi-cylinder internal combustion engines. The present method described here allows a portion of the cylinders of an internal combustion engine to be de-activated when less power is required, thus allowing the engine to provide full power when required, or less power with substantial fuel savings. The present method does so by altering the normal operation of intake and exhaust valves by leaving the intake valve at least partially closed, and the exhaust valve at least partially open. The present method overcomes numerous problems in the prior art, such as excess load placed on the engine caused by trapped gases, damaging thermal gradients across the engine block, and difficulty of retrofitting existing engines.

Structure for preventing surge of 2-cylinder engine

A structure for preventing surge of a 2-cylinder engine may include a first line communicating a crank room of the engine with a cylinder head cover, a first valve which may be disposed on the first line and allows a fluid within the crank room to flow into the cylinder head cover, a second line communicating the crank room of the engine with an intake manifold and a second valve which may be disposed on the second line and allows a fluid within the intake manifold into the crank room.

Internal combustion engine with partial deactivation and method for the operation of an internal combustion engine of said type

A system is provided for an internal combustion engine comprising, at least two cylinders wherein the at least two cylinders form at least two groups, wherein each group comprises at least one cylinder, the at least one cylinder of at least one group being formed as a cylinder which can be activated in a load-dependent manner and which is deactivated if a predefined load is undershot. The at least two groups are characterized by different cylinder volumes, the at least one cylinder of a first group having a lesser cylinder volume and the at least one cylinder of a second group having a greater cylinder volume; and the at least one cylinder of the second group comprises an activatable and deactivatable cylinder. Use of the first cylinder group, and deactivation of the second cylinder group during partial loads increases engine efficiency and fuel economy.

Device for controlling a heat engine

The invention relates to a device for controlling a heat engine, comprising a plurality of cylinders ( 1, 2, 3, 4 ), at least one of which ( 2, 3 ) is provided with at least two inlet valves ( 2 a, 2 b, 3 a, 3 b ). According to the invention, the device comprises a control unit ( 5 ) arranged to deactivate said inlet valves in series.

Method and system for pre-ignition control

Methods and systems are provided for reducing late burn induced cylinder pre-ignition events. Forced entry of residuals from a late burning cylinder into a neighboring cylinder may be detected based on engine block vibrations sensed in a window during an open exhaust valve of the late burning cylinder. In response to the entry of residuals, a pre-ignition mitigating action, such as fuel enrichment or deactivation, is performed in the neighboring cylinder.

Variable valve timing for egr control

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.

Cylinder activation/deactivation sequence control systems and methods

A target cylinder count module determines a target number of cylinders of an engine to be activated during a future period. The future period includes N sub-periods, and N is an integer greater than one. Based on the target number, a first sequence setting module generates a sequence indicating N target numbers of cylinders to be activated during the N sub-periods, respectively. A second sequence setting module retrieves N predetermined sequences for activating and deactivating cylinders during the N sub-periods, respectively, and generates a target sequence for activating and deactivating cylinders during the future period based on the N predetermined sequences. During the future period, a cylinder actuator module: activates opening of intake and exhaust valves of the cylinders that are to be activated based on the target sequence; and deactivates opening of intake and exhaust valves of the cylinders that are to be deactivated based on the target sequence.

MANAGING ENGINE FIRING FRACTION CHANGES

Methods and controllers for coordinating firing fraction transitions that occur in conjunction with transmission shifts are described. In one aspect, an engine controller transmits a do-not-shift instruction to a transmission controller based at least in part on a determination that a particular type of firing fraction transition is desired. The firing fraction transition is then implemented using a skip fire transition protocol. In this manner, the transmission is affirmatively prevented from shifting during the firing fraction transition. The described approaches are well suited for use in connection with transitions to DCCO or DFCO operation. 1. A method of managing a powertrain having an internal combustion engine and a transmission , the internal combustion engine being configured to at least sometimes operate in a skip fire or other cylinder output level modulation operating mode , the method comprising:determining that a firing fraction transition or transitory firing fraction change is desired;transmitting a do-not-shift instruction based at least in part on the determination that the firing fraction transition or transitory firing fraction change is desired; andimplementing the firing fraction transition or the transitory firing fraction change using a transition protocol that involves skip fire or other cylinder output level modulation, whereby the transmission is affirmatively prevented from shifting during the firing fraction transition or transitory firing fraction change.2. A method as recited in wherein the do-not-shift instruction takes the form of a hold-shift flag set to a first state in an engine management message transmitted by an engine controller claim 1 , the first state being indicative of an intent to prevent shifts from occurring while the hold-shift flag is set to the first state.3. A method as recited in wherein the powertrain is part of a vehicle having a Controller Area Network (CAN) bus and the do-not-shift instruction is transmitted ...

METHOD AND SYSTEM FOR IMPROVING TURBOCHARGER EFFICIENCY

Methods and systems are provided for enhancing turbocharger performance for a boosted engine system configured to operate with a pattern of deactivated cylinders. In one example, a method may include, in response to a demand for boost, operating with a cylinder pattern based on boost demand and turbocharger configuration. The specific pattern may depend on the pattern constraints imposed by engine load and NVH metrics. 19-. (canceled)10. A method for a boosted engine system , comprising: 'selectively deactivating individual cylinder valve mechanisms according to a cylinder pattern, the cylinder pattern selected to direct exhaust from active cylinders into one of a plurality of engine turbines.', 'in response to boost demand,'}11. The method of claim 10 , wherein the one of a plurality of engine turbines is a first turbine coupled to a first compressor claim 10 , the engine system further including a second turbine coupled to a second compressor claim 10 , the first and second compressor having distinct compressor outlets.12. The method of claim 11 , wherein the boost demand includes a boost demand to lower than a threshold boost pressure.13. The method of claim 12 , further comprising claim 12 , in response to a boost demand to higher than the threshold boost pressure claim 12 , maintaining all engine cylinders active.14. The method of claim 13 , wherein the cylinder pattern is selected to include a total number of deactivated/active engine cylinders claim 13 , the deactivated engine cylinders selected based on their firing order.15. The method of claim 10 , further comprising claim 10 , selecting the one of a plurality of engine turbines based on turbine temperature.16. The method of claim 15 , wherein the selecting includes claim 15 , selecting the turbine having a lower turbine temperature.17. The method of claim 10 , further comprising claim 10 , selecting the one of a plurality of engine turbines based on turbine speed claim 10 , where the turbine with a higher ...

INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING SAME

Provided is an internal combustion engine including a control device configured to adjust fuel injection valves and a resting mechanism and thereby executing a control of switching between an all-cylinder operation Oa and a reduced-cylinder operation Or, the all-cylinder operation Oa being an operation in which a combustion cycle is always performed in all of the cylinders and the reduced-cylinder operation Or being an operation in which a combustion cycle is always performed in some cylinders less than a cylinder number Nc, wherein in the reduced-cylinder operation Or, all of the cylinders perform a partial operation in which an operating state and a resting state thereof are repeated. 1. An internal combustion engine comprising:cylinders having a cylinder number of two or more;a plurality of fuel injection valves and a plurality of intake or exhaust valves which are respectively arranged to the two or more cylinders;a valve drive mechanism configured to open and close the intake or exhaust valves;a resting mechanism configured to cancel an action of the valve drive mechanism to maintain the intake or exhaust valves in a closed state; anda control device configured to adjust the fuel injection valves and the resting mechanism and thereby executing a control of switching between an all-cylinder operation and a reduced cylinder operation, the all-cylinder operation being an operation in which a combustion cycle is always performed in all of the cylinders, and the reduced-cylinder operation being an operation in which the combustion cycle is always performed in some cylinders less than the cylinder number,wherein in the reduced-cylinder operation, all of the cylinders perform a partial operation in which an operating state and a resting state thereof are repeated.2. The internal combustion engine according to claim 1 ,wherein the partial operation is an operation in which the operating state, in which fuel is injected by the fuel injection valve and also the intake or ...

Dynamic charge compression ignition engine with multiple aftertreatment systems

Methods, devices, controllers, and algorithms are described for operating an internal combustion engine wherein at least some firing opportunities utilize low temperature gasoline combustion (LTGC). Other firing opportunities may be skipped or utilize some other type of combustion, such as spark ignition. The nature of any particular firing opportunity is dynamically determined during engine operation, often on a firing opportunity by firing opportunity basis. Firings that utilize LTGC produce little, if any, nitrous oxides in the exhaust stream and thus, in some implementations, may require no aftertreatment system to remove them from the exhaust stream.

CONTROL APPARATUS FOR VEHICLE

A first control unit executes a valve stop inertial running including stopping an intake valve and an exhaust valve in a closed state during rotation of an output shaft, stopping supply of fuel to an engine, and setting a clutch in an engaged state to drive pistons of the engine by a rotational force from driving wheels. A second control unit executes a valve operation running including operating the intake valve and the exhaust valve during the rotation of the output shaft, and supplying the fuel to the engine based upon an intake conduit pressure. When a cancellation request is made during execution of the valve stop inertial running, a transient control unit operates the intake valve and the exhaust valve, and controls a throttle valve to an idling opening or less, thereby supplying a negative pressure to an intake passage. 1. A control apparatus for a vehicle configured to control a vehicle comprising a valve operation mechanism that can stop an intake valve and an exhaust valve in an engine in a closed state during rotation of an output shaft in the engine , and a clutch that can switch a power transmission route between the engine and a driving wheel between an engaged state and a disengaged state , comprising:a first control unit configured to execute a valve stop inertial running including stopping the intake valve and the exhaust valve in the closed state during the rotation of the output shaft, stopping supply of fuel to the engine, controlling a throttle valve of the engine to an idling opening or less, and setting the clutch in the engaged state to drive pistons of the engine by a rotational force from the driving wheel through the output shaft;a second control unit configured to execute a valve operation running including operating the intake valve and the exhaust valve during the rotation of the output shaft, and supplying the fuel to the engine; anda transient control unit configured to execute a transient running including operating the intake valve ...

Multi-level skip fire

In one aspect, a method for controlling operation of an internal combustion engine is described. The engine is operated in a skip fire manner such that selected skipped working cycles are skipped and selected active working cycles are fired to deliver a desired engine output. A particular level of torque output is selected for each of the fired working chambers. Various methods, arrangements and systems related to the above method are also described.

Oil supply device for engine

An oil supply device for an engine is provided with an oil pump of a variable capacity type; a plurality of hydraulically operated devices connected to the pump via an oil path; a pump control unit which changes the capacity of the pump to control a discharge amount of oil; and a hydraulic pressure detecting unit which detects a hydraulic pressure of the oil path. The plurality of the hydraulically operated devices include a metal bearing, and the pump control unit sets a highest requested hydraulic pressure among requested hydraulic pressures of the hydraulically operated devices as a target hydraulic pressure for each of the operating conditions of the engine, and changes the capacity of the pump in such a manner that the hydraulic pressure detected by the hydraulic pressure detecting unit coincides with the target hydraulic pressure for controlling the discharge amount.

SELECTIVELY DEACTIVATABLE ENGINE CYLINDER

An engine comprising: one or more multi-valve cylinders, each multi-valve cylinder having a plurality of intake valves and/or a plurality of exhaust valves; and one or more further cylinders, each further cylinder having fewer intake valves and/or fewer exhaust valves than each multi-valve cylinder, wherein a cylinder deactivation system of the engine is configured to selectively deactivate at least one further cylinder. 1. An engine comprising:one or more multi-valve cylinders each having a plurality of intake valves and/or a plurality of exhaust valves; andone or more further cylinders each having fewer intake valves and/or fewer exhaust valves than each multi-valve cylinder, wherein a cylinder deactivation system of the engine is configured to selectively deactivate at least one of each further cylinder.2. The engine according to claim 1 , wherein a valve lift height of at least one intake valve and/or at least one exhaust valve of at least one of each further cylinder is greater than that of the plurality of intake valves and/or the plurality of exhaust valves of the one or more multi-valve cylinders.3. The engine according to claim 1 , wherein at least one intake valve and/or at least one exhaust valve of the or at least one of each further cylinder is larger than the plurality of intake valves and/or the plurality of exhaust valves of the one or more multi-valve cylinders.4. The engine according to claim 1 , wherein the cylinder deactivation system is configured to selectively deactivate at least one of the one or more multi-valve cylinders.5. The engine according to claim 1 , wherein the cylinder deactivation system comprises one or more switchable roller finger followers or one or more collapsible lash adjusters.6. The engine according to claim 1 , wherein each multi-valve cylinder comprises two intake valves.7. The engine according to claim 1 , wherein each multi-valve cylinder comprises two exhaust valves.8. The engine according to claim 1 , wherein each ...

Method and system for controlling supercharger of vehicle

A method for controlling a supercharger of a vehicle includes: determining, at a first determination step, whether or not an engine operates in a cylinder deactivation (CDA) mode; calculating, at a second determination step, a difference value between a target boost pressure of a turbocharger and a current boost pressure of intake air boosted by the turbocharger, and determining whether or not the difference value is equal to or greater than a reference difference value; determining, at a third determination step, based on a current operating condition of the engine whether or not the supercharger is allowed to operate; determining, at a fourth determination step, a target rpm of the supercharger, and determining whether or not the target rpm is equal to or greater than a reference rpm; and operating the supercharger at an operating step.

VARIABLE VALVE APPARATUS

A variable valve apparatus includes: a swing body mounted to rotate to open and close a valve; an inner body driven by a cam and mounted in the swing body so as to switch a relatively-rotatable state and a latched state with respect to the swing body; a latching pin slidably mounted in the swing body so as to switch the latched state and the relatively-rotatable state of the inner body with respect to the swing body; and a control mechanism pressing the latching pin to make the inner body be latched to the swing body. 1. A variable valve apparatus comprising:a swing body mounted to rotate to open and close a valve;an inner body driven by a cam and mounted in the swing body so as to switch between a relatively-rotatable state and a latched state with respect to the swing body;a latching pin slidably mounted in the swing body so as to switch between the latched state and the relatively-rotatable state of the inner body with respect to the swing body; anda control mechanism pressing the latching pin to make the inner body be latched to the swing body.2. The variable valve apparatus of claim 1 , wherein a lower portion of a first side of the swing body is spherically supported by a supporting member claim 1 , and a lower portion of a second side of the swing body is in contact with a stem end of the valve claim 1 , such that the swing body rotates with respect to the supporting member to open and close the valve.3. The variable valve apparatus of claim 1 , wherein the inner body is mounted rotatably with respect to the swing body around a rotation axis parallel to a rotation axis of the swing body claim 1 , andan inner roller is rotatably mounted while keeping a state of being in contact with the cam to receive movement of the cam.4. The variable valve apparatus of claim 3 , wherein an inner spring is mounted between the inner body and the swing body to elastically support the inner roller of the inner body toward the cam claim 3 , anda swing roller is mounted in the ...

CAM-SWITCHING DEVICE AND METHOD OF CONTROLLING CAM-SWITCHING DEVICE

A cam-switching device switches between first and second cams provided so as to correspond to intake exhaust valves of an engine. In a case of switching from the first cam to the second cam, a cylinder resting unit stops the opening and closing operations of the intake and exhaust valves in the same combustion cycle, and a cam shaft moving unit starts sliding the cam shaft in a first cam angle range. In a case of switching from the second cam to the first cam, the cylinder resting unit stops the opening and closing operations of the intake and exhaust valves in the same combustion cycle, and the cam shaft moving unit starts sliding the cam shaft in a second cam angle range. 1. A cam-switching device that selectively switches between a first cam and a second cam to make valve characteristics of intake and exhaust valves of an engine variable ,the first cam and the second cam being provided corresponding to each of the intake and exhaust valves and having different cam profiles,each of the cam profiles being determined such that a first cam angle range where a valve lift amount of the first cam is greater than a valve lift amount of the second cam and a second cam angle range where a valve lift amount of the second cam is greater than a valve lift amount of the first cam are formed, andthe cam-switching device comprising:a cam shaft configured to rotate in conjunction with a crank shaft of the engine and provided such that the first cam and the second cam are rotatable together;a cam shaft moving unit configured to slide the cam shaft in an axis direction to selectively switch between the first cam and the second cam;a cylinder resting unit configured to stop opening and closing operations of the intake and exhaust valves to make a cylinder restable; anda cam shaft moving control unit configured to control the cylinder resting unit to stop the opening and closing operations of the intake and exhaust valves in the same combustion cycle and control the cam shaft moving ...

CONTROL DEVICE FOR ENGINE

A control device for an engine includes a valve-stopping mechanism which holds intake and exhaust valves of the first and the fourth cylinders (idle cylinders) of four cylinders in closed states, a throttle valve control unit , an ignition period control unit , and an ECU which controls the valve-stopping mechanism , the throttle valve control unit , and the ignition period control unit . The ECU sets a retard amount of the ignition period of the idle cylinder behind the basic ignition period at least in starting the all-cylinder operation in accordance with an amount of burned gas existing in the idle cylinder in switching to the all-cylinder operation from the reduced-cylinder operation. 1. A control device for an engine , the control device comprising:a valve-stopping mechanism that holds an intake valve and an exhaust valve of at least an idle cylinder in a closed state in a reduced-cylinder operation, the control device being applicable to the engine including a plurality of cylinders and an exhaust passage through which exhaust gas exhausted from the cylinders flows, the control device being configured to selectively execute the reduced-cylinder operation by setting at least one of the plurality of cylinders as the idle cylinder to be brought into an idle state, and an all-cylinder operation for operating all the cylinders;an air amount adjustment unit that adjusts an amount of air to be supplied to the cylinders;an ignition period adjustment unit that adjusts each ignition period of the cylinders; and set a basic ignition period as a basic value of the ignition period of each of the cylinders based on an engine speed and an engine load;', 'upon establishment of a switching condition from the all-cylinder operation to the reduced-cylinder operation, execute an air amount increasing control for increasing the air amount of each of the cylinders using the air amount adjustment unit, and control the valve-stopping mechanism to hold the intake valve and the ...

CYLINDER DEACTIVATION AND ENGINE BRAKING FOR THERMAL MANAGEMENT

A method for exhaust temperature management in a multiple-cylinder, reciprocating-piston engine, comprising sensing a low temperature condition of the exhaust and implementing an increased heat output engine cycle pattern for the engine based on the sensed low temperature condition. The increased heat output engine cycle pattern comprises deactivating fuel injection to a first cylinder of the engine, the first cylinder comprising a piston reciprocating between top-dead-center and bottom-dead-center. Also, activating engine braking mode on the first cylinder by opening one or more valves when the piston is away from bottom-dead-center during a compression stroke. A second cylinder of the engine is fired in a combustion mode while the first cylinder is in engine braking mode. 1. A method for exhaust temperature management in a multiple-cylinder , reciprocating-piston engine , comprising:sensing a low temperature condition of the exhaust; deactivating fuel injection to a first cylinder of the engine, the first cylinder comprising a piston reciprocating between top-dead-center and bottom-dead-center; and', 'activating engine braking mode on the first cylinder by opening one or more valves when the piston is away from bottom-dead-center during a compression stroke; and, 'implementing an increased heat output engine cycle pattern for the engine in response to the sensed low temperature condition, comprisingfiring a second cylinder of the engine in a combustion mode while the first cylinder is in engine braking mode.2. The method of claim 1 , wherein implementing an increased heat output engine cycle pattern further comprises: deactivating fuel injection to a third cylinder of the engine; and', 'deactivating an intake valve and an exhaust valve to close the third cylinder., 'deactivating in a cylinder deactivation mode, comprising3. The method of claim 1 , wherein the one or more valves comprise at least one intake valve and at least one exhaust valve claim 1 , and wherein ...

Pre-lubrication and skip fire operations during engine cranking

A system includes a valve actuation system, a pre-lubrication pump coupled to a lubrication circuit and configured to provide oil to the valve actuation system, a catalyst for receiving and treating exhaust gasses, and a controller. The controller is configured to identify an engine start request and determine whether the catalyst temperature is below a first threshold value. In response to determining that the catalyst temperature is below the first threshold value, the controller actuates the pre-lubrication pump to direct lubricant to the valve actuation system, controls the valve actuation system to deactivate at least one cylinder of an engine, and, subsequent to deactivating the at least one cylinder of the engine, cranks the engine.

SYSTEMS HAVING DEACTIVATOR CONTROLLER OPERATIVELY CONNECTED TO DEACTIVATORS FOR AT LEAST TWO CYLINDERS AND METHODS FOR CYLINDER DEACTIVATION

In an embodiment, an internal combustion engine comprises a plurality of cylinders, each of the plurality of cylinders comprising at least one intake deactivator operatively connected to at least one intake valve and at least one exhaust deactivator operatively connected to at least one exhaust. An intake deactivator controller is operatively connected to the intake deactivators associated with at least two cylinders of the plurality of cylinders, and an exhaust deactivator controller is operatively connected to the exhaust deactivators associated with the at least two cylinders. In another embodiment, only a single deactivator controller is operatively connected to both the intake deactivators and to the exhaust deactivators associated with the at least two cylinders of the plurality of cylinders. 1. An internal combustion engine comprising:a plurality of cylinders, each of the plurality of cylinders comprising at least one intake valve and at least one exhaust valve;a plurality of intake deactivators associated with the plurality of cylinders, wherein, for each cylinder of the plurality of cylinders, at least one intake deactivator of the plurality of intake deactivators is operatively connected to the at least one intake valve and controllable to operate in either an intake activation state in which actuation of the at least one intake valve is permitted or an intake deactivation state in which actuation of the at least one intake valve is not permitted;a plurality of exhaust deactivators associated with to the plurality of cylinders, wherein, for each cylinder of the plurality of cylinders, at least one exhaust deactivator of the plurality of exhaust deactivators is operatively connected to the at least one exhaust valve and controllable to operate in either an exhaust activation state in which actuation of the at least one exhaust valve is permitted or an exhaust deactivation state in which actuation of the at least one exhaust valve is not permitted;an intake ...

EXHAUST-GAS-TURBOCHARGED INTERNAL COMBUSTION ENGINE WITH PARTIAL DEACTIVATION AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE

Embodiments for operating an engine in a partial deactivation mode are provided. In one example, a method for an engine having a first cylinder group and a second cylinder group includes responsive to engine operation in a first engine speed-load region, deactivating one or more cylinders of the second cylinder group, and responsive to the deactivating, adjusting exhaust valve timing of one or more cylinders of the first cylinder group. The method further includes responsive to engine operation a second engine speed-load region, adjusting exhaust valve timing of the one or more cylinders of the first cylinder group, and responsive to the adjusting, deactivating the one or more cylinders of the second cylinder group. 1. A supercharged internal combustion engine , comprising:{'sub': 1,ex', '1,ex, 'at least three cylinders, each cylinder having at least one outlet opening which is adjoined by an exhaust line for discharging exhaust gases via an exhaust-gas discharge system, each cylinder further having at least one inlet opening which is adjoined by an intake line for supply of charge air via an intake system, the at least three cylinders arranged into at least two groups with in each case at least one cylinder, each cylinder of a first group of the at least two groups being a cylinder which is in operation even in the event of partial deactivation of the internal combustion engine, and each cylinder of a second group of the at least two groups being formed as a load-dependently switchable cylinder, at least one outlet opening of at least one cylinder of the first group equipped with an at least partially variable valve drive, with an oscillating outlet valve which opens up or shuts off an associated outlet opening and which is adjustable at least with regard to a control time for opening, the oscillating outlet valve realizing a valve lift Δhbetween an open position and a closed position and opening up the associated outlet opening during an opening duration Δt;'}an ...

VARIABLE DISPLACEMENT ENGINE CONTROL

Methods and systems are provided for controlling engine operation. One method comprises during a first condition, operating the engine with a single cylinder deactivated and remaining cylinders activated with a first intake duration, and during a second condition, operating the engine with the single cylinder deactivated and the remaining cylinders activated with a second intake duration. The method further comprises during a third condition, operating the engine with all cylinders activated. 1. A method for an engine comprising:during a first condition, operating the engine with a single cylinder deactivated and remaining cylinders activated with a first intake duration;during a second condition, operating the engine with the single cylinder deactivated and the remaining cylinders activated with a second intake duration; andduring a third condition, operating the engine with all cylinders activated.2. The method of claim 1 , wherein the first condition includes a first engine load claim 1 , the second condition includes a second engine load claim 1 , and the third condition includes a third engine load claim 1 , and wherein the second engine load is lower than the first engine load claim 1 , and the first engine load is lower than the third engine load.3. The method of claim 2 , further comprising during the first condition operating the remaining cylinders with a first intake valve lift claim 2 , and during the second condition claim 2 , operating the remaining cylinders with a second intake valve lift.4. The method of claim 3 , wherein during the third condition claim 3 , all cylinders are activated with the first intake duration and the first intake valve lift.5. The method of claim 4 , wherein the first intake valve lift is higher than the second intake valve lift.6. The method of claim 4 , wherein the first intake duration is longer than the second intake duration.7. The method of claim 6 , wherein the first intake duration is approximately 240 crank angle ...

CYLINDER DEACTIVATION MODES TO AVOID ENGINE RESONANCE

A method for jumping cylinder deactivation (“CDA”) modes to avoid a primary powertrain resonant frequency in a six-cylinder diesel engine-powered machine comprises operating an engine between an idled condition and a first engine speed limit in one of a two-cylinder CDA mode or a four-cylinder CDA mode. The method operates the engine between the first engine speed limit and a second engine speed limit in a three-cylinder CDA mode. The first engine speed limit is an engine speed below which the two-cylinder or four-cylinder CDA mode causes the machine to operate below a primary powertrain resonant frequency and also above which the three-cylinder CDA mode causes the machine to operate above the primary powertrain resonant frequency, thus avoiding the primary powertrain resonant frequency during operation. A second engine speed limit can be used to select a CDA mode that causes the machine to operate above the primary powertrain resonant frequency. 120-. (canceled)21. A method for jumping cylinder deactivation (“CDA”) modes to avoid a first order resonance in a six-cylinder diesel engine-powered machine , comprising:operating an engine between an idled condition and a first engine speed limit in three-cylinder CDA mode, wherein CDA mode deactivates a number of cylinders by shutting off fueling and closing intake and exhaust valves, wherein the three-cylinder CDA mode deactivates three engine cylinders and fires the remaining cylinders; andoperating the engine above the first engine speed limit in one of a two-cylinder CDA mode or a four-cylinder CDA mode, wherein the two-cylinder CDA mode deactivates two engine cylinders and fires the remaining cylinders, and wherein the four-cylinder CDA mode deactivates four engine cylinders and fires the remaining cylinders,wherein the first engine speed limit and the second engine speed limit are engine speeds in which the two-cylinder CDA mode, the three-cylinder CDA mode, or the four-cylinder CDA mode cause the machine to ...

Internal combustion engine

An internal combustion engine having: at least one piston-cylinder unit, a turbocharger having an exhaust gas turbine, a catalytic converter connected between the at least one piston-cylinder unit and the exhaust gas turbine, and a control device, wherein the control device is designed to control a fluid-delivery device such that, when the internal combustion engine is in a state in which no combustion and/or ignition takes place in the at least one piston-cylinder unit, the fluid-delivery device delivers fuel-air mixture through the catalytic converter.

SYSTEMS AND METHODS FOR UTILIZING CYLINDER DEACTIVATION WHEN A VEHICLE IS IN A REVERSE OPERATING MODE

A controller for a vehicle includes at least one processor and at least one memory storing instructions that, when executed by the processor, cause the controller to perform various operations. The operations include determining that the vehicle is in reverse and in response, initiating a cylinder deactivation mode for an engine of the vehicle. 1. A controller for a vehicle comprising at least one processor and at least one memory storing instructions that , when executed by the at least one processor , cause the controller to:determine that the vehicle is in reverse; andin response, initiate a cylinder deactivation (“CDA”) mode for an engine of the vehicle.2. The controller of claim 1 , wherein the CDA mode corresponds to a predetermined number of cylinders being deactivated.3. The controller of claim 1 , wherein in response to an accelerator pedal being depressed by more than a threshold amount claim 1 , the controller is structured to exit the CDA mode.4. The controller of claim 1 , wherein in response to a requested torque amount being greater than an available torque or preset threshold amount claim 1 , the controller is structured to exit the CDA mode.5. The controller of claim 1 , wherein response to an exhaust gas temperature being below a predefined exhaust gas temperature threshold claim 1 , the controller is structured to maintain the CDA mode for the engine.6. The controller of claim 1 , wherein the instructions claim 1 , when executed by the at least one processor claim 1 , cause the controller to maintain the CDA mode based on periodically evaluating operation data associated with the vehicle while the vehicle is in reverse.7. The controller of claim 6 , wherein the operation data comprises look-ahead data claim 6 , the look-ahead data comprising at least one of route road curvature claim 6 , grade claim 6 , elevation claim 6 , and speed limit claim 6 , and wherein the instructions claim 6 , when executed by the at least one processor claim 6 , cause ...

MECHANICALLY CONTROLLABLE VALVE TRAIN ASSEMBLY, INTERNAL COMBUSTION ENGINE AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE

A valve train assembly for an engine comprising cylinders, each comprising a gas inlet and a gas outlet valve. A camshaft comprises a peripheral contour. A valve stoke adjusting device comprises a control shaft comprising control contours. An intermediate lever arrangement comprises an intermediate lever comprising a working curve which cooperates with a swivel lever, and an engagement element connected to a control contour. Each intermediate lever is connected to the peripheral contour. A transmission arrangement provides that an intermediate lever arrangement and a swivel lever arrangement is associated with each gas inlet valve. A control contour for an idle range is similar to a control contour for a full-load range. A control contour for a part-load range of a gas inlet valve of a shut-off cylinder comprises a section different to a control contour for a part-load range of the gas inlet valve of a remaining cylinder. 19-. (canceled)10. A mechanically controllable valve train assembly for an internal combustion engine comprising cylinders , at least one of which is a shut-off cylinder and at least one of which is a remaining cylinder , each of the cylinders comprising at least one gas inlet valve and at least one gas outlet valve , the mechanically controllable valve train assembly comprising:at least one swivel lever arrangement, each of the at least one swivel lever arrangement comprising a swivel lever;a camshaft comprising a peripheral contour;a valve stoke adjusting device comprising a control shaft comprising control contours arranged thereon; an intermediate lever comprising a working curve configured to cooperate with the swivel lever, and', 'an engagement element configured to be operatively connected to one of the control contours of the valve stoke adjusting device so that different valve strokes are adjustable and a zero stroke adjustment of the at least one gas inlet valve of the at least one shut-off cylinder is possible,', 'each intermediate lever ...

ENGINE CONTROL DEVICE

Provided are a valve stop mechanism capable of switching intake valves and exhaust valves of deactivated cylinders between an openable/closable state and a closed state, and an engine speed control unit which controls the engine speed. The engine speed control unit controls the engine speed in such a manner that the amount of change in the engine speed with respect to time is reduced, as compared with a case in which a specific condition is not satisfied, when the specific condition that switching by the valve stop mechanism is not completed, and that connection between an engine and a power transmission unit is released is satisfied after issuance of a switching request from one of a reduced-cylinder operation and an all-cylinder operation to the other thereof. 1. An engine control device to be provided in a vehicle , the vehicle being provided with an engine and a power transmission unit , the engine including a plurality of cylinders , each of which is provided with an intake valve and an exhaust valve , the cylinders being configured to perform combustion of a fuel-air mixture , the engine being operative to switch between an all-cylinder operation in which combustion of the fuel-air mixture is performed in all the cylinders , and a reduced-cylinder operation in which combustion in at least one of the cylinders is stopped and the at least one cylinder is deactivated , the power transmission unit being connected to the engine and configured to transmit power of the engine to wheels , the engine control device comprising:an operation request determination unit which determines whether the reduced-cylinder operation or the all-cylinder operation is performed based on an operating condition of the engine;a valve stop mechanism which is operative to switch the intake valve and the exhaust valve of the at least one cylinder between an openable/closable state and a closed state;a valve control unit which controls the valve stop mechanism in such a manner that the ...

PARTICULATE FILTER SOOT MANAGEMENT FOR INTERNAL COMBUSTION ENGINES

Methods, systems, and devices for particulate filter soot management for internal combustion engines are described herein. A method for particulate filter soot management for internal combustion engines includes determining a quantity of soot on a particulate filter and adjusting a skip fire firing sequence based at least in part on maintaining the quantity of soot on the particulate filter within a desired soot quantity range. 1. A method for particulate filter soot management for internal combustion engines , the method comprising:determining a desired soot quantity range for a particulate filter based on at least one of: a desired range of filter efficiency values and a pressure drop derived by comparing pressure values at a position upstream of a porous material in the particulate filter and a position downstream of the porous material;determining a current quantity of soot on the particulate filter; andadjusting a skip fire firing sequence based at least in part on maintaining the quantity of soot on the particulate filter within the desired soot quantity range.2. The method as recited in claim 1 , wherein the quantity of soot is adjusted by controlling a temperature of exhaust gas of the internal combustion engine.3. The method as recited in claim 1 , wherein the quantity of soot is adjusted by controlling an oxygen level in the exhaust gas of the internal combustion engine.4. The method as recited in claim 1 , wherein the quantity of soot is adjusted by controlling both an oxygen level in the exhaust gas of the internal combustion engine and a temperature of exhaust gas of the internal combustion engine.5. An engine controller claim 1 , for operating an internal combustion engine including a plurality of working chambers with at least one working chamber having a deactivatable intake and/or exhaust valve claim 1 , the engine controller comprising:a firing fraction selector arranged to select a firing fraction from a plurality of firing fractions for operating ...

DIESEL ENGINE CYLINDER DEACTIVATION MODES

When selecting cylinders of a multi-cylinder diesel engine in an engine system for cylinder deactivation (CDA), a method can comprise designating a first resonance around a first periodic frequency output of the engine system as a primary boundary and designating a second resonance around a second periodic frequency output of the engine system as a secondary boundary. Selecting cylinders can comprise selecting one of half, one third, or two thirds of the multiple cylinders for CDA while firing the remaining multiple cylinders. The selection can be made so that the periodic frequency output of the engine is between the primary and secondary boundaries. A compact periodic frequency band can be implemented to further restrict the selection of cylinders for CDA. The first periodic frequency output can be about 15 Hertz+/−1.5 Hertz and the second periodic frequency output can be between 30-40 Hertz+/−1.5 Hertz. 1. A method for compensating for engine roll in an in-line multiple-cylinder diesel combustion engine system , comprising:when an in-line multiple-cylinder diesel combustion engine in the engine system is operating at an engine speed at or above idle, as by rotating a crankshaft connected to pistons in the in-line multiple-cylinders, implementing a cylinder deactivation mode comprising a periodic frequency output at a flywheel connected to the crankshaft above about 15 Hertz+/−1.5 Hertz and below about 40 Hertz+/−1.5 Hertz or else selecting a full cylinder firing mode, wherein implementing the cylinder deactivation mode excludes a periodic frequency output at the flywheel connected to the crankshaft of about 25-26 Hertz+/−1.5 Hz.2. (canceled)3. The method of claim 1 , wherein the idle engine speed is about 600 rotations per minute of the crankshaft.4. The method of any claim 1 , wherein implementing the cylinder deactivation mode consists of firing half of the multiple cylinders while deactivating the other half of the multiple cylinders.5. The method of any claim ...

CONTROL DEVICE OF MULTI-CYLINDER ENGINE

A control device of a multi-cylinder engine is provided. The control device includes an auxiliary component and a valve stopping device having a locking mechanism for stopping an operation of at least one of intake and exhaust valves of a specific cylinder of the multi-cylinder engine according to an engine operating state. The control device includes an angular speed variation detecting device for detecting an angular speed variation of a crankshaft, an auxiliary component control device for controlling a drive load of the auxiliary component. In an all-cylinder operation, when an engine load is lower than a predetermined value and the detected angular speed variation exceeds a predetermined threshold, the auxiliary component control device performs an auxiliary component drive load increase control in which the drive load of the auxiliary component is increased to reduce the angular speed variation to be lower than the predetermined threshold. 1. A control device of a multi-cylinder engine , the control device including an auxiliary component driven by the engine and a valve stopping device having a locking mechanism for stopping an operation of at least one of intake and exhaust valves of a specific cylinder of the multi-cylinder engine according to an operating state of the engine , the control device of the multi-cylinder engine comprising:an angular speed variation detecting device for detecting an angular speed variation of a crankshaft of the engine; andan auxiliary component control device for controlling a drive load of the auxiliary component,wherein, in an all-cylinder operation in which the operation of the at least one of the valves is not stopped by the locking mechanism, when an engine load is lower than a predetermined value and the angular speed variation detected by the angular speed variation detecting device exceeds a predetermined threshold, the auxiliary component control device performs an auxiliary component drive load increase control in ...

CYLINDER DEACTIVATION CONTROL FOR DRIVELINE BRAKING

Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, an actual total number of deactivated cylinders may be adjusted to control driveline braking. The driveline braking may be controlled in a towing mode, a hill descent mode, and during normal driving conditions. 19-. (canceled)10. A vehicle operating method , comprising:in a non-hill descent mode, operating a first actual total number of cylinders with cylinder poppet valves remaining in closed positions over an engine cycle in response to a desired engine brake torque, and operating a second actual total number of cylinders with cylinder poppet valves opening and closing over the engine cycle in response to the desired engine brake torque, cylinders included in the first actual total number of cylinders and cylinders in the second actual total number of cylinders not combusting air and fuel; andin a hill descent mode, shifting a transmission to a lower gear and operating a third actual total number of cylinders with cylinder poppet valves remaining in closed positions over the engine cycle in response to the desired engine brake torque, and operating a fourth actual total number of cylinders with cylinder poppet valves opening and closing over the engine cycle in response to the desired engine brake torque, cylinders in the third actual total number of cylinders and cylinders included in the fourth actual total number of cylinders not combusting air and fuel.11. The method of claim 10 , further comprising shifting the transmission based on a first shift schedule in the hill descent mode.12. The method of claim 11 , further comprising shifting the transmission based on a second shift schedule in the non-hill descent mode.13. The method of claim 10 , where operating the fourth total number of cylinders includes opening and closing only exhaust valves of cylinders included in the fourth total number of cylinders.14. The method of claim 10 , further ...

VARIABLE VALVE LIFT ACTUATOR OF ENGINE

Provided is a variable valve lift actuator of an engine, which includes: a first body rotating; a second body; a driving module; and a return spring, wherein an entire portion or a partial front end of the driving module is inserted into a rear end of the second body, the lift degree of the valve is variably controlled in two stages of a high-speed mode and a low-speed mode based on an operating condition of the engine, and when only the high-speed cam is installed on the camshaft, the driving pin is operated in a low-speed and low-load state of the engine to separate the first body from the second body so as to deactivate a cylinder. 1. A variable valve lift actuator of an engine , the variable valve lift actuator comprising:first body rotating in a predetermined angular range according to a rotational motion of a high-speed cam coupled to a camshaft;a second body connected to or disconnected from the first body, rotated according to the rotational motion of the high-speed cam when connected with the first body, and rotated according to a rotational motion of low-speed cams provided on both sides of the high-speed cam when disconnected with the first body, thereby adjusting a lift degree of the valve;a driving module for operating a driving pin such that the driving pin protrudes toward or retracts from a front of the first body so as to connect or disconnect the first body to or from the second body;a rotary shaft disposed on an upper portion of the valve while crossing both side walls of the first and second bodies to enable the rotational motion of the first body; anda return spring installed around the rotary shaft to provide restoring force so as to return the first body rotated by the high-speed cam to an original position,wherein the lift degree of the valve is variably controlled in two stages of a high-speed mode and a low-speed mode based on an operating condition of the engine, when only the high-speed cam is installed on the camshaft, a pause control ...

Methods and systems for reducing water accumulation in an engine

Methods and systems are provided for reducing accumulation of condensate in an engine intake during an engine non-combusting condition. In one example, during an engine non-combusting condition, responsive to a higher than threshold ambient humidity and a lower than threshold intake manifold temperature, intake and exhaust valves of deactivatable cylinders may be closed in order to seal the cylinders and during an immediately subsequent engine combusting condition, the intake and exhaust valves of the deactivatable cylinders may be activated and combustion may be resumed in the deactivatable cylinders before starting combustion in non-deactivatable cylinders. Also, during the engine non-combusting condition, residual hot exhaust may be recirculated to the intake manifold to evaporate condensate in the intake manifold.

Exhaust Gas Temperature Assist for Two-Cycle Uniflow Scavenged Diesel Engines at Lower Engine Loads with Various Engine Operating Schemes

A method of raising exhaust gas temperatures of a two-cycle uniflow scavenged engine at lower loads. At lower loads, the exhaust valves are activated with a frequency that is less frequent than every engine cycle. This exhaust valve deactivation may be combined with additional engine operating strategies, such as by using fewer than all cylinders as combusting cylinders, adjusting fueling to combusting cylinders, and reducing compressor output. 1. A controller-implemented method of raising exhaust gas temperatures of a two-cycle uniflow scavenged engine , the engine having a number of cylinders , each cylinder having at least one exhaust valve , comprising:storing data representing a threshold exhaust gas temperature;receiving data representing the current exhaust gas temperature;comparing the current exhaust gas temperature to the threshold exhaust gas temperature;operating the engine with some or all of the cylinders as combusting cylinders;if the current exhaust gas temperature is above the threshold exhaust gas temperature, operating all cylinders as combusting cylinders;if the current exhaust gas temperature is at or below the threshold exhaust gas temperature, operating one or more cylinders as combusting cylinders and activating the exhaust valves of one or more of the combusting cylinders with a reduced frequency of activation relative to normal exhaust valve activation; and repeating the receiving, comparing, operating, activating step until the current exhaust gas temperature is above the threshold gas temperature.2. The method of claim 1 , wherein the engine further has a compressor claim 1 , and further comprising the step of reducing the compressor output if the current exhaust gas temperature is at or below the threshold exhaust gas temperature.3. The method of claim 2 , wherein the compressor is a variable speed compressor.4. The method of claim 2 , wherein the compressor is a compressor of a supercharger or blower.5. The method of claim 2 , wherein ...

System and Method for Improved Gas Exchange in Cylinder Deactivation Applications

A cylinder deactivation system includes an intake cam follower assembly, an exhaust cam follower assembly, an exhaust cam, and a controller. The intake cam follower assembly is used to open an intake engine valve and is switchable to operate in one of an active state and a deactive state. The exhaust cam follower assembly is used to open an exhaust engine valve and is switchable to operate in one of a primary lift state and a secondary lift state. The exhaust cam includes a primary lift cam lobe and a secondary lift cam lobe and is used to actuate the exhaust cam follower assembly in the primary lift state and in the secondary lift state. The controller is used to open the exhaust engine valve during the deactive combustion cycle in advance of the opening of the intake engine valve that occurs during the subsequent active combustion cycle. 1. A cylinder-deactivation system for an internal combustion engine used to disable an activation of an engine-valve , said system comprising:an intake cam-follower-assembly which opens an intake-engine-valve, said intake cam-follower-assembly switchable to operate in one of an active-state that opens the intake-engine-valve and defines an active-combustion-cycle, and a deactive-state that prevents the opening of the intake-engine-valve and defines a deactive-combustion-cycle;an exhaust cam-follower-assembly which opens an exhaust-engine-valve, said exhaust cam-follower-assembly switchable to operate in one of a primary-lift-state, and a secondary-lift-state;an exhaust-cam which includes a primary-lift cam-lobe and a secondary-lift cam-lobe in rotational contact with the exhaust cam-follower-assembly, said primary-lift cam-lobe positioned to actuate the exhaust cam-follower-assembly in the primary-lift-state, and said secondary-lift cam-lobe positioned to actuate the exhaust cam-follower-assembly in the secondary-lift-state; anda controller in communication with the intake cam-follower-assembly and the exhaust cam-follower- ...

Methods and system for arbitrating fuel cut out for a hybrid vehicle

A method and system for operating a hybrid vehicle that includes an integrated starter/generator and a driveline disconnect clutch is described. In one example, the method determines whether or not to rotate an engine via an electric machine while propelling a vehicle via the electric machine according to vehicle efficiency.

Noise/vibration reduction control

Systems and methods for reducing noise or vibration generated by an internal combustion engine are described. An engine controller is arranged to operate the working chambers of the engine in a cylinder output level modulation manner A noise/vibration reduction unit actively control of a device that is not a part of the powertrain. The device is controlled in a feed forward manner to alter an NVH characteristic of the vehicle in a desired manner based at least in part on a characteristic of the cylinder output level modulation operation of the engine.

Hydraulic control system for engine

A hydraulic control system for an engine having a plurality of cylinders includes: valve stop mechanisms that switch the engine from all-cylinder operation to cylinder cut-off operation; a VVT that can change the timing to open and close valves 14 during all-cylinder operation and cylinder cut-off operation; an oil pump that supplies oil to hydraulically operated devices including the valve stop mechanisms and the VVT through a hydraulic path; and a control device. The control device controls a maintaining oil pressure, which is required to maintain the operated state of the valve stop mechanisms during cylinder cut-off operation, so that the maintaining oil pressure is set to a high value in a high oil viscosity region.

Hybrid valve train system

For a given cylinder in the engine having two intake valves and two exhaust valves, one of the intake valves is driven by a bucket tappet, while the other intake valve is actuated via a roller finger follower. Similarly, one of the exhaust valves is driven by a bucket tappet, while the other exhaust valve is actuated via a roller finger follower. The intake valves read inputs form an intake camshaft, and the exhaust valves read inputs from an exhaust camshaft.

METHODS AND SYSTEMS FOR AN IGNITION ARRANGEMENT OF AN INTERNAL COMBUSTION ENGINE

Methods and systems are provided for a prechamber. In one example, the prechamber comprises one or more valves for optionally adjusting gas flow therethrough. The one or more valves may allow pre-chamber and combustion chamber settings to be modified, thereby enhancing combustion operating parameters. 1. A system , comprising:a pre-chamber comprising a first passage fluidly coupled to an inlet passage and a second passage fluidly coupled to an exhaust passage, wherein an ignition device is configured to provide a spark directly into an interior volume of the pre-chamber.2. The system of claim 1 , wherein the first passage comprises a first valve and the second passage comprises a second valve.3. The system of claim 1 , wherein the pre-chamber comprises a first group of openings claim 1 , a second group of openings claim 1 , and a third group of openings fluidly coupling the interior volume of the pre-chamber to a combustion chamber.4. The system of claim 3 , wherein the first group of openings is sized differently than the second group of openings claim 3 , and wherein the second group of openings is sized differently than the third group of openings.5. The system of claim 3 , wherein the first group of openings is larger than the second group of openings claim 3 , and wherein the second group of openings is larger than the third group of openings.6. The system of claim 1 , wherein fuel is not injected into the pre-chamber.7. An engine system claim 1 , comprising:a fuel injector and a spark plug, wherein the spark plug is positioned to provide a spark directly to an interior volume of a pre-chamber, wherein the pre-chamber is fluidly coupled to a combustion chamber via a plurality of openings, an intake passage via a first passage, and an exhaust passage via a second passage, and wherein a first valve is arranged in the first passage and a second valve is arranged in the second passage.8. The engine system of claim 7 , wherein the pre-chamber is arranged outside of ...

VALVETRAIN WITH VARIABLE VALVE ACTUATION

A method of providing a rocker arm set for a valvetrain includes providing a first intake rocker arm, a second intake rocker arm and a first exhaust rocker arm. The first intake rocker arm is configured as a switching rocker arm for a first intake valve on a first cylinder. The second intake rocker arm is for a second intake valve on a second cylinder. The second rocker arm is configured to operate in a normal Otto cycle mode. The first exhaust rocker arm is provided for a first exhaust valve on the second cylinder. The first intake rocker arm operates in one of an LIVC or EIVC mode where the first intake rocker arm is configured to open or close at a different time compared to the second intake valve. The first exhaust rocker arm operates in a cylinder deactivation mode. 1. A method of providing a rocker arm set for a valvetrain , the method comprising:providing a first intake rocker arm configured as a switching rocker arm for a first intake valve on a first cylinder;providing a second intake rocker arm for a second intake valve on a second cylinder, the second rocker arm configured to operate in a normal Otto cycle mode;providing a first exhaust rocker arm for a first exhaust valve on the second cylinder; andwherein (i) the first intake rocker arm operates in one of a late intake valve closing mode (LIVC) and an early intake valve closing mode (EIVC), where the first intake rocker arm is configured to one of open and close at a different time compared to the second intake valve, and (ii) the first exhaust rocker arm operates in a cylinder deactivation mode.2. The method of wherein the first intake rocker arm operates in added motion and wherein the first intake rocker arm operates in LIVC wherein the first intake rocker arm closes the first intake valve later than the second intake valve.3. The method of where the first intake rocker arm operates in EIVC wherein the first intake rocker arm opens the first intake valve earlier than the second intake valve.4. The ...

FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL

In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the skip fire controller is arranged to select a base firing fraction that has a repeating firing cycle length that will repeat at least a designated number of times per second at the current engine speed. Such an arrangement can be helpful in reducing the occurrence of undesirable vibrations. 1. A engine controller suitable for directing operation of an engine in a skip fire manner , the engine controller comprising:a firing fraction determining unit arranged to determine an operational firing fraction and associated engine settings for delivering a desired engine output, wherein the firing fraction determining unit is arranged to select the firing fraction from a set of available firing fractions; anda firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction, wherein the firing controller includes an accumulator that helps smooth transitions between different firing fractions; andwherein all of the firing fractions in the set of available firing fractions other than a firing fraction of one, are simple fractions having an integer denominator of no more than 15.2. An engine controller as recited in suitable for use with an engine having a plurality of working chambers claim 1 , each working chamber having at least one associated intake valve and at least one associated exhaust valve claim 1 , wherein:for each skipped working cycle, the engine controller is arranged to cause at least one of the associated intake and exhaust valves to not open during skipped working cycles to thereby prevent pumping air through the associated working chamber during the skipped working cycle.3. An engine controller as recited in wherein the firing fraction ...

Multi-Mode Valve Lift

An overhead cam engine system comprises a rotating overhead exhaust cam rail comprising a plurality of exhaust lobes. A first switching roller finger follower actuates a first exhaust valve, and is configured to switch between a first lift profile and a second lift profile. A second switching roller finger follower is coupled to actuate a second exhaust valve, and is configured to switch between a third lift profile and a fourth lift profile. The third and fourth lift profile are different than the first and second lift profile. An actuation assembly is connected to switch the first switching roller finger follower and the second switching roller finger follower to select between at least three exhaust lift modes to open and close the first exhaust valve and the second exhaust valve using combinations of the first, second, third and fourth lift profiles. 1. An overhead cam engine system , comprising:an engine block comprising a first in-line cylinder and a second in-line cylinder, each of the first and second in-line cylinders comprising a cylinder head comprising a first intake port and a second intake port and a first exhaust port and a second exhaust port;a reciprocating piston assembly comprising a plurality of pistons for reciprocating in respective ones of the plurality of in-line cylinders;a rotating overhead intake cam rail comprising a plurality of intake lobes, the plurality of intake lobes comprising, respectively for each of the first in-line cylinder and the second in-line cylinder, a first set and a second set of intake actuation lobes for rotating above the first intake port and for rotating above the second intake port;a rotating overhead exhaust cam rail comprising a plurality of exhaust lobes, the plurality of exhaust lobes comprising, respectively for each of the first in-line cylinder and the second in-line cylinder, a first set and a second set of exhaust actuation lobes for rotating above the first exhaust port and for rotating above the second ...

CONTROL METHOD OF INTERNAL COMBUSTION ENGINE

A preparation control for suppressing fluctuation of an output torque of the engine at the time of executing switching operation from the whole cylinder operation to the partial cylinder operation is executed when having made a switching request from the whole cylinder operation to the partial cylinder operation, the valve operation phase is fixed to a predetermined phase before executing the switching operation, and the cylinder deactivation mechanism is controlled so as to execute the switching operation at a target switching time which is prefixed by corresponding to the predetermined phase. The target switching time is previously set to a timing at which abnormal noises are not generated, by corresponding to the valve operation phase fixed to the predetermined phase. 1. A control method of an internal combustion engine which comprises a plurality of cylinders , a valve operation phase variable mechanism configured to change a valve operation phase of at least one of an intake valve and an exhaust valve provided in each of the plurality of cylinders , and a cylinder deactivation mechanism configured to perform switching between partial cylinder operation in which a part of the plural cylinders is operated and whole cylinder operation in which all of the cylinders are operated , comprising steps of:(a) executing, by a computer, a preparation control for suppressing fluctuation of an output torque of the engine at a time of executing switching operation from the whole cylinder operation to the partial cylinder operation when a switching request from the whole cylinder operation to the partial cylinder operation is made;(b) fixing, by a computer, the valve operation phase to a predetermined phase before executing the switching operation; and(c) outputting, by a computer, switching command signal to the cylinder deactivation mechanism based on a target switching time which is prefixed in accordance with the predetermined phase so as to execute the switching operation ...

CONTROL METHOD OF INTERNAL COMBUSTION ENGINE

A preparation control for suppressing fluctuation of an output torque of the engine at the time of executing switching operation from the whole cylinder operation to the partial cylinder operation is executed when having made a switching request from the whole cylinder operation to the partial cylinder operation. The target switching time executing the switching operation is calculated in accordance with the valve operation phase after the preparation time is completed. The cylinder deactivation mechanism is controlled such that the switching operation is executed at the target switching time. The target switching time is set in accordance with the valve operation phase at the timing in which the abnormal noises are not generated. 1. A control method of an internal combustion engine which comprises a plurality of cylinders , a valve operation phase variable mechanism configured to change a valve operation phase of at least one of an intake valve and an exhaust valve provided in each of the plurality of cylinders , and a cylinder deactivation mechanism configured to perform switching between partial cylinder operation in which apart of the plural cylinders is operated and whole cylinder operation in which all of the cylinders are operated , comprising steps of:(a) executing, by a computer, a preparation control for suppressing fluctuation of an output torque of the engine at the time of executing switching operation from the whole cylinder operation to the partial cylinder operation when a switching request from the whole cylinder operation to the partial cylinder operation is made;(b) calculating, by a computer, target switching time executing the switching operation after the preparation control is completed in accordance with the valve operation phase; and(c) outputting, by a computer, switching command signal to the cylinder deactivation mechanism based on the target switching time to execute the switching operation.2. The control method of the internal ...

SYSTEM AND METHOD FOR SELECTING A CYLINDER DEACTIVATION MODE

Systems and methods for operating an engine with a plurality of deactivating valves for deactivating engine cylinders are presented. In one example, a plurality of different cylinder operating modes may be available to operate the engine. Engine fuel consumption in each of the plurality of different cylinder operating modes is estimated and the engine may be operated in the cylinder mode that provides greatest fuel efficiency. 1. A method for operating an engine , comprising:estimating a plurality of engine fuel consumption values for operating the engine with a plurality of configurations including different actual total numbers of active cylinders; andoperating the engine including an actual total number of active cylinders based on the plurality of engine fuel consumption values.2. The method of claim 1 , where operating the engine includes deactivating an engine cylinder via ceasing to supply fuel to the engine cylinder.3. The method of claim 2 , where deactivating the engine cylinder also includes deactivating an intake valve of the engine cylinder so that the intake valve is held closed for an engine cycle and opening and closing an exhaust valve of the engine cylinder during the engine cycle.4. The method of claim 1 , where the plurality of engine fuel consumption values is based on the plurality configurations including different actual total numbers of active cylinders during an engine cycle.5. The method of claim 1 , where operating the engine includes deactivating one or more engine cylinders based on the plurality of engine fuel consumption values.6. The method of claim 1 , further comprising operating the engine including the actual total number of active cylinders based on engine blow through being expected to be less than a threshold level.714-. (canceled)15. A vehicle system claim 1 , comprising:an engine including a plurality of cylinders; anda controller including non-transitory executable instructions, which that, when executed by the controller, ...

CYLINDER DEACTIVATION ENTRANCE AND EXIT CONTROL

Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders operable by a valve actuation mechanism. Staging of engine operating conditions is disclosed to facilitate exit from and/or entrance into a cylinder deactivation event. 111-. (canceled)12. A system comprising;an internal combustion engine for propelling a vehicle, the internal combustion engine including a plurality of cylinders, each of the cylinders including at least one intake valve and at least one exhaust valve;a valve actuation mechanism connected to each of the plurality of cylinders, the valve actuation mechanism including a lifting mechanism for opening and closing the at least one intake valve and the at least one exhaust valve of each of the cylinders;a fueling system connected each of the cylinders for providing fuel to each of the cylinders; determine a cylinder deactivation event associated with the at least one cylinder is active or inactive, wherein the cylinder deactivation event includes the valve actuation mechanism being deactivated for the at least one cylinder and fueling is cut off from the at least one cylinder;', 'determine a route condition of the vehicle, the route condition indicating, a presence or absence of a fueling requirement of the at least one cylinder;', 'in response to the fueling requirement being present and the cylinder deactivation event being active, activating the valve actuation mechanism to open and close the at least one intake valve and the at least one exhaust valve before fueling the at least one cylinder with the fueling system; and', 'in response to the fueling requirement being absent and the cylinder deactivation event being inactive, cutting fueling to the at least one cylinder before deactivating the valve actuation mechanism., 'a controller operably connected with the valve actuation mechanism and the fueling system, wherein the controller is configured to13. The system of claim 12 , ...

Variable cycle engine

A variable cycle engine may include a first cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a second cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a connection rail that is formed near the first cylinder and the second cylinder, a first variable port that is diverged from one side of the connection rail and is connected to the first cylinder, a second variable port that is diverged from the other side of the connection rail and is connected to the second cylinder, and a first variable control valve disposed on the first variable port and a second variable control valve disposed on the second variable port, wherein the first and second variable control valves are opened or closed accordingly with respect to each other to directly connect the first cylinder with the second cylinder.

SYSTEM AND METHOD TO EXTEND OPERATING TIME OF VALVE ACTUATORS OF AN INTERNAL COMBUSTION ENGINE

Systems and methods for determining when one or more cylinders of an engine may be deactivated are presented. In one example, different cylinder deactivation strategies are used to determine which engine cylinders are deactivated during an engine cycle in response to an actual total number of valve actuator state changes being greater than a first threshold. 1. An engine control method , comprising:deactivating engine cylinders via a controller according to a first cylinder deactivation strategy in response to an actual total number of valve actuator state changes being less than a first threshold; anddeactivating the engine cylinders via the controller according to a second cylinder deactivation strategy in response to an actual total number of valve actuator state changes being greater than a second threshold.2. The method of claim 1 , where the first cylinder deactivation strategy deactivates a first engine cylinder and activates a second engine cylinder during a first engine cycle while the engine operates at a substantially constant engine speed claim 1 , a substantially constant load claim 1 , and a substantially constant temperature claim 1 , and where the first cylinder deactivation strategy activates the first cylinder and deactivates a second engine cylinder during a second engine cycle while the engine operates at the substantially constant engine speed claim 1 , a substantially constant load claim 1 , and a substantially constant temperature.3. The method of claim 2 , where the second cylinder deactivation strategy deactivates a first group of engine cylinders during a first engine cycle while the engine operates at a substantially constant engine speed claim 2 , a substantially constant load claim 2 , and a substantially constant temperature claim 2 , and where the second cylinder deactivation strategy deactivates the first group of engine cylinders during a second engine cycle while the engine operates at the substantially constant engine speed claim 2 ...

Thermal management for regenerating an aftertreatment device

A system and method for regeneration of an aftertreatment component are described. The disclosed method can employ any one or combination of operating modes that obtain a target condition of the exhaust gas to support or initiate regeneration of the aftertreatment device.

Hybrid power supply system and method of supplying power from engine

A hybrid power supply system for an engine is disclosed. The hybrid power supply system includes a sensing unit to generate a signal indicative of a speed of the engine and a controller to determine the speed of the engine based on the signal received from the sensing unit. The controller compares the speed of the engine with a predefined maximum idle speed, and cuts off a supply of fuel to the engine, when the speed of the engine is greater than or equal to the predefined maximum idle speed. The controller shuts off an inlet valve and an exhaust valve associated with a cylinder of the engine. The closure of the inlet valve and the exhaust valve allow compression and expansion of air within the cylinder during supply of a rotational power by a flywheel.

FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL

Skip fire engine control using a first order sigma delta based firing controller is described. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The operational firing fraction is selected from a set of available firing fractions. The engine controller uses a first order sigma delta based converter to direct working cycle firings in a skip fire manner that delivers the selected firing fraction. The converter includes or functions substantially equivalent to a first order sigma delta converter and may be implemented any of: algorithmically using a processor; using digital, analog or hybrid components; using a lookup table; or using other appropriate techniques. In some embodiments firing decisions are made on a working cycle by working cycle basis. The described approach may be used in gasoline engines, diesel engines, turbocharged or supercharged engines, or others. 1. An engine controller suitable for directing operation of an engine having a plurality of working chambers in a skip fire manner , the engine controller comprising:a firing fraction determining unit arranged to select an operational firing fraction from a set of available firing fractions; anda first order sigma delta converter based firing controller arranged to direct working cycle firings in a skip fire manner that delivers the selected operational firing fraction.2. An engine controller as recited in wherein the first order sigma delta converter based firing controller includes or functions substantially equivalently to a first order sigma delta converter.3. An engine controller as recited in wherein the engine is a diesel engine.4. An engine controller as recited in wherein the engine is turbocharged or supercharged.5. An engine controller as recited in wherein the first order sigma delta converter based firing controller is arranged to make firing decisions on a working cycle by working ...

ENGINE FOR PERFORMING CDA

An engine that can implement cylinder deactivation (CDA) includes: a plurality of cylinders; a variable valve duration apparatus that is mounted in at least one of the plurality of cylinders and that performs a long duration mode and a short duration mode of an intake valve of a corresponding cylinder; a CDA apparatus that is mounted in at least another one of the plurality of cylinders and that performs a general operation mode and a CDA mode of an intake valve and an exhaust valve of a corresponding cylinder; and a controller that controls operation of the variable valve duration apparatus and the CDA apparatus according to an operation state of an engine, wherein the controller controls the variable valve duration apparatus to operate in a short duration mode, when the CDA apparatus operates in the CDA mode. 1. An engine for performing cylinder deactivation (CDA) , comprising:a plurality of cylinders;a variable valve duration apparatus that is mounted in at least one of the plurality of cylinders and that performs a long duration mode and a short duration mode of an intake valve of a first corresponding cylinder;a CDA apparatus that is mounted in at least another one of the plurality of cylinders and that performs a general operation mode and a CDA mode of an intake valve and an exhaust valve of a second corresponding cylinder; anda controller that controls operation of the variable valve duration apparatus and the CDA apparatus according to an operation state of an engine,wherein the controller controls the variable valve duration apparatus to operate in the short duration mode, when the CDA apparatus operates in the CDA mode.2. The engine of claim 1 , wherein the engine is an engine comprising first claim 1 , second claim 1 , third claim 1 , and fourth cylinders sequentially disposed claim 1 , the CDA apparatus is provided in the second and third cylinders or the first and fourth cylinders claim 1 , and the variable valve duration apparatus is provided in the ...

Cylinder Head With Valve Deactivators

To improve fuel efficiency, some gasoline engines are equipped with valve deactivators in some of the cylinders so that at low torque conditions only a subset of the total number of cylinders are active. In prior art engines, particularly when they have four valves per cylinder, space is tight. It is known to provide a cam carrier in the head between the cylinder head and the camshaft. The cylinder head bolts pass through the head under the cam carrier. According to the present disclosure, the cam carrier, and its associated disadvantages, is obviated by widening the bearings for the camshafts, using smaller diameter head bolts, and putting the orifices tor the head bolts directly through the bearings. 1. A cylinder head assembly of an internal combustion engine , comprising:a cylinder head comprising:a plurality of combustion chambers tops each having two intake and two exhaust valves;cam towers unitarily formed with the cylinder head; andan intake camshaft having multiple cam lobes that act upon the intake valves via intake followers disposed in the cylinder head wherein at least a portion of the followers are deactivatable.2. The cylinder head assembly of claim 1 , further comprising:an exhaust camshaft having multiple cam lobes that act upon the exhaust valves via exhaust followers disposed in the cylinder head; anda bearing surface disposed between each pair of cam towers wherein:the intake camshaft is cradled in a first plurality of the bearing surfaces; andthe exhaust camshaft is cradled in a second plurality of the bearing surfaces.3. The cylinder head assembly of wherein:the bearing surfaces have orifices defined therein to accommodate head bolts.4. The cylinder head assembly of wherein the bearing surfaces have first lands on a first side of the orifice associated with the bearing surface and second lands on a second side of the orifice.5. The cylinder head assembly of wherein the cylinder head has four cylinders claim 1 , all of the valves associated with ...

Dynamic charge compression ignition engine with multiple aftertreatment systems

Methods, devices, controllers, and algorithms are described for operating an internal combustion engine wherein at least some firing opportunities utilize low temperature gasoline combustion (LTGC). Other firing opportunities may be skipped or utilize some other type of combustion, such as spark ignition. The nature of any particular firing opportunity is dynamically determined during engine operation, often on a firing opportunity by firing opportunity basis. Firings that utilize LTGC produce little, if any, nitrous oxides in the exhaust stream and thus, in some implementations, may require no aftertreatment system to remove them from the exhaust stream.

Variable displacement engine including different cam lobe profiles

Methods and systems are provided for an engine including cams having different lobe profiles. In one example, cams of a first cam group drive a plurality of deactivatable cylinder valves and cams of a second cam group drive a plurality of non-deactivatable cylinder valves. The cams of the first cam group include a different lobe profile relative to cams of the second cam group.

SYSTEMS AND METHODS FOR A SPLIT EXHAUST ENGINE SYSTEM

Methods and systems are provided for operating a split exhaust engine system that provides blowthrough air and exhaust gas recirculation to an intake passage via a first exhaust manifold and exhaust gas to an exhaust passage via a second exhaust manifold. In one example, an air-fuel control method for the engine system may include flowing air from the intake manifold through a plurality of engine cylinders to a junction of the exhaust passage and a bypass passage in response to a condition, the junction positioned along the exhaust passage between first and second emission control devices. The method may further include flowing exhaust gas to the first emission control device while flowing the air to the junction. 1. An engine operating method , comprising:flowing air from an intake manifold through a plurality of engine cylinders, via a first set of cylinder exhaust valves exclusively coupled to a scavenge exhaust manifold, to a junction of an exhaust passage and a bypass passage in response to a condition, the junction positioned along the exhaust passage between first and second emission control devices, the exhaust passage coupled to a blowdown exhaust manifold and the bypass passage coupled between the scavenge exhaust manifold and the exhaust passage, between the first and second emission control devices; andflowing exhaust gas from a second set of cylinder exhaust valves exclusively coupled to the blowdown manifold to the first emission control device, via the exhaust passage, while flowing the air to the junction.2. The method of claim 1 , wherein the exhaust passage includes a turbocharger turbine positioned upstream of the first emission control device.3. The method of claim 1 , where the exhaust gas is a rich exhaust gas mixture that does not include air that has not participated in combustion in the plurality of engine cylinders claim 1 , and where the air does not participate in combustion within the plurality of engine cylinders.4. The method of claim ...

CYLINDER DEACTIVATION ENTRANCE AND EXIT CONTROL

Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders operable by a valve actuation mechanism. Staging of engine operating conditions is disclosed to facilitate exit from and/or entrance into a cylinder deactivation event. 1. A system comprising:an internal combustion engine for propelling a vehicle, the internal combustion engine including a plurality of cylinders, each of the cylinders including at least one intake valve and at least one exhaust valve;a valve actuation mechanism connected to each of the plurality of cylinders, the valve actuation mechanism including a lifting mechanism for opening and closing the at least one intake valve and the at least one exhaust valve;a fueling system connected to each of the plurality of cylinders for providing fuel to the plurality of cylinders; determine an active cylinder deactivation event associated with the at least one cylinder in which the valve actuation mechanism is deactivated and the fueling is cut off from the at least one cylinder;', 'in response to the active cylinder deactivation event being present, determine at least one of a speed of the vehicle and an acceleration of the vehicle; and', 'in response to the at least one of the speed and the acceleration crossing a first threshold, activating the valve actuation mechanism to open and close the at least one intake valve and the at least one exhaust valve of the at least one cylinder, and in response to the at least one of the speed and the acceleration crossing a second threshold after crossing the first threshold, fueling the at least one cylinder with the fueling system., 'a controller operably connected with the valve actuation mechanism and the fueling system, wherein the controller is configured to2. The system of claim 1 , wherein claim 1 , before fueling the at least one cylinder claim 1 , the controller is further configured to increase a speed of a turbocharger connected to the ...

SYSTEM AND METHOD FOR OPERATING ENGINE CYLINDERS

Systems and methods for activating and deactivating cylinders of an engine that may activate and deactivate one cylinder independent of other cylinders are presented. In one example, an engine cylinder firing fraction and a remainder value that is based on the engine cylinder firing fraction are a basis for activating and deactivating engine cylinders. The systems and methods also provide for transitioning between different cylinder firing fractions. 1. An engine control method , comprising:activating and deactivating a cylinder of an engine via a controller in response to an engine cylinder firing fraction and a remainder value, the remainder value based on the engine cylinder firing fraction.2. The method of claim 1 , where the engine cylinder is deactivated via holding intake and exhaust valves of the cylinder closed over a cycle of the cylinder.3. The method of claim 1 , where the engine cylinder is deactivated via ceasing fuel flow to the engine cylinder.4. The method of claim 1 , further comprising adjusting the remainder value in response to a cylinder event claim 1 , the cylinder event an event associated with operation of the cylinder.5. The method of claim 4 , where the event associated with operation of the cylinder is a position of a piston in the cylinder or a stroke of the cylinder.6. The method of claim 1 , where the engine cylinder firing fraction is an actual total number of cylinder firing events divided by an actual total number of cylinder compression strokes over a predetermined actual total number of cylinder compression strokes.7. The method of claim 1 , where the remainder is a value left over after adding a previous remainder to the engine cylinder firing fraction claim 1 , and where the previous remainder is initialized with a predetermined value.8. An engine control method claim 1 , comprising:providing an engine cylinder firing fraction via a controller based on a desired engine torque;adjusting a previous remainder value in response to ...

CONTROL DEVICE FOR MULTI-CYLINDER ENGINE

Disclosed is a control device for a multi-cylinder engine having a combustion chamber () to which an intake port () and an exhaust port () are connected. The control device comprises: an intake-side variable valve operating mechanism () for controlling a lift timing of two intake valves () of the intake port (); an exhaust-side variable valve operating mechanism () for controlling a lift timing of an exhaust valve (); and an exhaust-side valve operating mechanism () for driving an exhaust valve () at a fixed timing. The control device is operable, when executing cylinder deactivation in a low engine load and low engine speed operating range, to cause the exhaust-side variable valve operating mechanism () to open the exhaust valve () during downward movement of a piston () in a cylinder () being subjected to the cylinder deactivation. 1. A control device for a multi-cylinder engine , comprising:an intake port;an intake valve provided correspondingly to the intake port;an exhaust port;an exhaust valve provided correspondingly to the exhaust port; anda combustion chamber to which the intake port and the exhaust port are connected,wherein the control device is operable to be able to execute a cylinder deactivation in which a fuel injection is stopped in at least one specific cylinder in the multi-cylinder engine, andwherein, when the cylinder deactivation of the at least one specific cylinder is executed, the control device is operable to suppress a lift of the intake valve of the said cylinder in an intake stroke, and to open the exhaust valve of the said cylinder.2. A control device for a multi-cylinder engine , comprising:a plurality of intake ports;a plurality of intake valves each provided correspondingly to a respective one of the plurality of intake ports;a plurality of exhaust ports;a plurality of exhaust valves each provided correspondingly to a respective one of the plurality of exhaust ports;a combustion chamber to which the plurality of intake ports and the ...

INTERNAL COMBUSTION ENGINE CONTROL APPARATUS

There is provided an internal combustion engine control apparatus that is capable of determining accurately from an ignition discharging time period whether the intake valve and the exhaust valve are in the operative condition or in the inoperative condition. A cylinder deactivation controller causes a first ignition controller to perform a first ignition control on the basis of the ignition timing when issuing no cylinder deactivation request, and causes a second ignition controller to perform a second ignition control on the basis of an energizing time period when issuing the cylinder deactivation controller. The discharging time period is calculated by a discharging time period calculation section on the basis of an ion current signal output from the ignition coil. 1. An internal combustion engine control apparatus comprising:a cylinder deactivation controller which activates or deactivates at least one cylinder of an internal combustion engine;a valve operating section which puts at least any one of an intake valve and an exhaust valve provided in the internal combustion engine into an operative condition or an inoperative condition on the basis of an request from the cylinder deactivation controller;an ignition controller which energizes an ignition coil provided in the internal combustion engine on the basis of a predetermined ignition timing and a predetermined energizing time period, to cause an ignition plug disposed on a combustion chamber of the internal combustion engine to discharge an ignition spark;a discharging time period calculation section which calculates an ignition discharging time period that is a dwell time period of the ignition discharge;a valve condition determination section which determines an operating condition of at least any one of the intake valve and the exhaust valve on the basis of the ignition discharging time period calculated by the discharging time period calculation section, wherein the ignition controller includes a first ...

METHOD AND SYSTEM FOR SELECTIVE CYLINDER DEACTIVATION

Methods and systems are provided for adjusting a cylinder deactivation pattern to improve camshaft phasing. In response to a request for actuating a camshaft phaser of a variable cam timing device, a cylinder deactivation pattern is adjusted by reactivating cylinders that were deactivated while deactivating other cylinders that were active, while maintaining a total number of deactivated/active cylinders. Cylinders are selected for reactivation or deactivation based on their individual camshaft torsion signatures so that sufficient cam torque is generated to actuate the phaser and provide the requested phasing. 2. The method of claim 1 , wherein the request for cam phasing includes a request to advance or retard cam timing claim 1 , and wherein the reactivation is in response to the request being a request to advance and/or retard cam phasing from a current cam phasing.3. The method of claim 1 , further comprising claim 1 , adjusting the cam timing with a cam torque actuated actuator.4. The method of claim 1 , wherein the cylinder pattern includes a total number of deactivated/active cylinders.5. The method of claim 1 , wherein the cylinder pattern is selected responsive to engine load.6. The method of claim 1 , wherein the cylinder pattern includes a first and a second deactivated cylinder and a third active cylinder claim 1 , and wherein reactivating the valve mechanism includes reactivating the valve mechanism of the first cylinder while maintaining the valve mechanism of the second cylinder deactivated.7. The method of claim 6 , wherein reactivating the valve mechanism further includes claim 6 , deactivating the valve mechanism of the third active cylinder while reactivating the valve mechanism of the first cylinder to maintain a total number of deactivated/active cylinders of the cylinder pattern.8. A method claim 6 , comprising:operating an engine in a first mode wherein in response to a request for cam phasing, an individual cylinder valve mechanism of a ...

System And Method For Controlling A Variable Valve Actuation System To Reduce Delay Associated With Reactivating A Cylinder

An engine control system includes a cylinder control module that deactivates and reactivates a cylinder of an engine based on a driver torque request while an ignition system associated with the engine is in an on position. A firing order module selectively adjusts a firing order of the engine based on a time when the cylinder is reactivated. 1. An engine control system comprising:a cylinder control module that deactivates and reactivates a cylinder of an engine based on a driver torque request while an ignition system associated with the engine is in an on position; anda firing order module that selectively adjusts a firing order of the engine based on a time when the cylinder is reactivated.2. The engine control system of claim 1 , wherein the firing order module adjusts the firing order when the driver torque request is greater than a predetermined torque.3. The engine control system of claim 1 , wherein the firing order module advances spark in the cylinder by N degrees when a crank angle is less than a predetermined angle.4. The engine control system of claim 3 , wherein the crank angle corresponds to a piston position at the time relative to top dead center and N is an integer greater than 1.5. The engine control system of claim 4 , wherein N is 360.6. A method for controlling an engine claim 4 , comprising:deactivating and reactivating a cylinder of an engine based on a driver torque request while an ignition system associated with the engine is in an on position; andselectively adjusting a duration of a period for which at least one of an intake valve and an exhaust valve of the cylinder are opened based on a first time corresponding to a crank angle of the engine when the cylinder is reactivated relative to top dead center;opening the exhaust valve at a second time that is based on the first time.opening the exhaust valve when the cylinder is reactivated if the crank angle is greater than a first predetermined angle; andadjusting a firing order of the ...

CYLINDER DEACTIVATION FOR A MULTIPLE CYLINDER ENGINE

Portable jobsite equipment includes a generator including an internal combustion engine and an alternator. The internal combustion engine includes a first cylinder including a first spark plug configured to create a first electrical spark, a second cylinder including a second spark plug configured to create a second electrical spark, an electronic control unit configured to activate and deactivate at least one of the first cylinder and the second cylinder, and a load source receiving supplied power from the generator. The electronic control unit activates one of the first cylinder and the second cylinder in response to a threshold increase of the load source. 1. Portable job site equipment comprising: a first cylinder including a first spark plug configured to create a first electrical spark;', 'a second cylinder including a second spark plug configured to create a second electrical spark;', 'an electronic control unit configured to activate and deactivate at least one of the first cylinder and the second cylinder; and, 'a generator comprising an internal combustion engine and an alternator, wherein the internal combustion engine comprisesa load source receiving supplied power from the generator;wherein the electronic control unit activates one of the first cylinder and the second cylinder in response to a threshold increase of the load source.2. The portable jobsite equipment of claim 1 , wherein the electronic control unit comprises a sequencing control circuit configured to control timing of one or more spark plug firing events.3. The portable jobsite equipment of claim 2 , wherein deactivating a cylinder comprises skipping one or more spark plug firing events.4. The portable jobsite equipment of claim 3 , further comprising an auxiliary load source claim 3 , wherein the electronic control unit activates one of the first cylinder and the second cylinder in response to detection of the auxiliary load source.5. The portable jobsite equipment of claim 1 , wherein ...

STRATEGIES FOR RESONANCE MANAGEMENT

Methods are provided for managing forcing function frequency profiles during operation of a multi-cylinder engine. A first stroke mode for a first cylinder is selected and comprises at least a sequential deactive operation of the opening and the closing of a first intake valve and a first exhaust valve during at least two reciprocations of a first reciprocating piston. The first stroke mode is operated on the first cylinder, a second stroke mode is operated on a second cylinder, and a third stroke mode is operated on the remaining cylinders to meet or exceed a required torque output and to form a first aggregate of forcing function frequency profiles that comprises primary forcing function frequency profiles that are less than or approximate in amplitude and less than or approximate in frequency value to one of the respective baseline of primary forcing function frequency profiles. 1. A method for managing forcing function frequency profiles during operation of a multi-cylinder engine , each cylinder of the engine comprising a respective variable cylinder torque output which provides a corresponding forcing function frequency profile , the engine comprising a variable aggregate torque output comprising the sum of the cylinder torque outputs of each of the cylinders and comprising the sum of the forcing function frequency profiles of each of the cylinders , and the engine comprising a respective baseline aggregate torque output for each nonzero reciprocation speed of a reciprocating piston assembly coupled to the cylinders , wherein each respective baseline aggregate torque output provides a respective baseline of primary forcing function frequency profiles , and wherein the respective baseline aggregate torque output corresponds to active operation modes for each cylinder , where active operation modes comprise sequential actuation of an intake valve , a fuel injector , and an exhaust valve for each cylinder , the method comprising:selecting a first stroke mode for ...

Managing firing phase transitions

Methods and controllers for dynamically altering the phase of a firing sequence during operation of an engine are described. The described methods and controllers are particularly useful in conjunction with cylinder output level modulation operation of an engine such as dynamic skip fire operation of the engine and/or multi-charge level operation of the engine.

METHODS AND SYSTEMS FOR ENGINE BRAKING WITH REDUCED NOISE, VIBRATION, AND HARSHNESS

Methods and systems are provided for engine braking in a vehicle. In one example, a method may include, in response to an engine braking request: deactivating fueling to at least one engine cylinder, decreasing an effective flow area of a turbine inlet of a variable geometry turbocharger (VGT), and adjusting an intake valve of the at least one engine cylinder based on a requested braking torque of the engine braking request and the effective flow area of the turbine inlet. In this way, increased exhaust backpressure may be generated to increase engine pumping losses while the intake valve adjustment increases in-cylinder pumping losses, thereby increasing an amount of engine braking torque. 1. A method , comprising:responsive to an engine braking request:deactivating fueling to at least one cylinder of an engine;decreasing an effective flow area of a turbine inlet of a variable geometry turbocharger (VGT); andadjusting an intake valve of the at least one cylinder based on a requested braking torque of the engine braking request and the effective flow area of the turbine inlet, including determining an amount of braking torque generated by decreasing the effective flow area of the turbine inlet, and further closing the intake valve as a difference between the determined amount of braking torque generated by decreasing the effective flow area of the turbine inlet and the requested braking torque of the engine braking request increases.2. The method of claim 1 , wherein adjusting the intake valve of the at least one cylinder based on the requested braking torque of the engine braking request and the effective flow area of the turbine inlet comprises further closing the intake valve of the at least one cylinder as the requested braking torque of the engine braking request increases.3. The method of claim 2 , wherein further closing the intake valve comprises decreasing a hydraulic pressure in a continuously variable valve lift mechanism hydraulically coupled to the ...

ENGINE SYSTEM

An engine system includes: a hydraulic valve stop mechanism configured to switch states of an intake valve and exhaust valve of a same stopped cylinder; a hydraulic pressure changing device configured to change hydraulic pressure supplied to the valve stop mechanism; and a valve control portion configured to control the hydraulic pressure changing device. When a return from a reduced-cylinder operation to an all-cylinder operation is requested, and an engine revolution is less than a reference revolution, the hydraulic pressure is changed such that opening of one of the valves of the stopped cylinder able to restart at an earlier stage is first restarted. When the return is requested, and the engine revolution is not less than the reference revolution, the hydraulic pressure is changed such that opening of the exhaust valve of the stopped cylinder is restarted before opening of the intake valve. 1. An engine system comprising a plurality of cylinders each including an intake valve and an exhaust valve , an air-fuel mixture that is a mixture of air and a fuel being combusted in each of the plurality of cylinders ,the engine system configured to switch between an all-cylinder operation in which the air-fuel mixture is combusted in each of all the cylinders and a reduced-cylinder operation in which the air-fuel mixture is not combusted in a specific cylinder out of the plurality of cylinders, and the specific cylinder is set to a stop state,the engine system further comprising:a valve drive mechanism configured to open and close the intake and exhaust valves of the cylinders at respective predetermined timings;a hydraulic drive valve stop mechanism configured to perform switching between a state where each of the intake valve and exhaust valve of the specific cylinder is openable and closable at the predetermined timing by the valve drive mechanism and a state where each of the intake valve and exhaust valve of the specific cylinder is kept closed;a hydraulic pressure ...

INTERNAL COMBUSTION ENGINE WITH ALTERNATING CYLINDER SHUTDOWN

The invention relates to a method for the alternating cylinder shutdown of a three-cylinder or five-cylinder internal combustion engine during partial load operation, in which the opening of the gas exchange valves of the shut-down cylinders is deactivated. The valve deactivation of the shut-down cylinders is intended to begin and end with the deactivation and the subsequent reactivation of the intake valves of said cylinders, in each case at the start of the regular intake cycle of said cylinders. 1. A method for alternating cylinder shutdown of a three-cylinder or five-cylinder internal combustion engine in partial load operation , the method comprising deactivating an opening of gas exchange valves of a shutdown cylinder , and subsequently reactivating the opening of the gas exchange valves of the shutdown cylinder , wherein the valve deactivation of the shutdown cylinder at least one of begins or ends with the deactivation and the subsequent reactivation of the intake valves of said cylinder each at a beginning of a regular suction cycle.2. The method according to claim 1 , further comprising opening the intake valves of the shutdown cylinder directly before their deactivation with a variably adjustable additional stroke (Z) within a crankshaft angle range in which lies a regular push-out cycle of said cylinder.3. The method according to claim 1 , further comprising closing exhaust valves of the shutdown cylinder to close said cylinder before deactivating the intake valves. The invention relates to a method for the alternating cylinder shutdown of a three-cylinder or five-cylinder internal combustion engine in partial load operation in which the gas exchange valves of the shutdown cylinder are deactivated.Especially in gas engines, the shutdown of individual cylinders is a proven option, in the partial load range, for displacing the operating point of the other cylinders to a higher load point with better efficiency and more favorable fuel consumption ...

ENGINE COOLING BY ELECTRICALLY DRIVEN INTAKE AIR COMPRESSOR

Methods and systems are provided for cooling an engine by operating an electrically driven intake air compressor. In one example, in response to a determination, based on a measured or inferred engine temperature, that the engine temperature is greater than a threshold temperature, employing the vehicle's electrically driven intake air compressor to route air through a charge air cooler and engine cylinders, while engine spins unfueled. In this way the engine temperature may be reduced even under conditions not normally amenable to engine cooling, such as at idle-stops or when an engine coolant system is degraded. 1. A hybrid vehicle method , comprising:responsive to engine temperature greater than a threshold temperature when engine idle-stop conditions are met,spinning the engine unfueled; andoperating an electric intake air compressor to route air to engine cylinders via a charge air cooler.2. The method of claim 1 , continuing the operating until the engine temperature is below the threshold temperature claim 1 , and then spinning the engine to rest.3. The method of claim 1 , further comprising claim 1 , during the operating claim 1 , propelling the hybrid vehicle using motor torque.4. The method of claim 1 , wherein the electric intake air compressor includes an intake air compressor driven by an electric motor claim 1 , the intake air compressor including one of an electric supercharger compressor driven by the electric motor claim 1 , a turbocharger compressor coupled to each of the electric motor and an exhaust turbine claim 1 , and an intake compressor driven by the electric motor and coupled in a bypass downstream of a turbine-driven intake compressor.5. The method of claim 4 , wherein a duty cycle commanded to the electric motor is based on each of a difference between the engine temperature and the threshold temperature claim 4 , and a rate of rise of the engine temperature.6. The method of claim 5 , further comprising claim 5 , operating an engine ...

CONTROL DEVICE FOR ENGINE

A control device for an engine including cylinders, and configured to perform a reduced-cylinder operation by idling some of cylinders. The control device includes a hydraulic valve-stopping mechanism which closes the intake and exhaust valves of the cylinders in response to establishment of the reduced-cylinder operation execution condition, a hydraulic variable valve timing mechanism capable of changing a phase of the exhaust valve of the engine , and an ECU which controls the valve-stopping mechanism and the hydraulic variable valve timing mechanism . In response to establishment of the reduced-cylinder operation execution condition, the ECU allows the hydraulic variable valve timing mechanism to execute the phase change to the exhaust valve , and subsequently allows the valve-stopping mechanism to bring the intake and exhaust valves of the cylinders into closed state. 1. A control device for an engine , the control device comprising:a hydraulic valve-stopping mechanism which holds an intake valve and an exhaust valve of at least an idle cylinder in a closed state in a reduced-cylinder operation, the control device being applicable to an engine including a plurality of cylinders, and configured to selectively execute a reduced-cylinder operation by setting at least one of the plurality of cylinders as the idle cylinder to be brought into an idle state, and an all-cylinder operation for operating all the cylinders;a hydraulic phase control mechanism which makes a phase of the intake valve or the exhaust valve of the engine variable; andprocessing circuitry configured to control the hydraulic valve-stopping mechanism and the hydraulic phase control mechanism, whereinin response to establishment of a reduced-cylinder operation execution condition as a condition for executing the reduced-cylinder operation, the processing circuitry allows the hydraulic phase control mechanism to execute a phase change to the intake valve or the exhaust valve, and subsequently, allows ...

INTERNAL COMBUSTION ENGINE CONTROL FOR IMPROVED FUEL EFFICIENCY

A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described. In one aspect the skip fire decisions are made on a working cycle by working cycle basis. During selected skipped working cycles, the corresponding cylinders are deactivated such that air is not pumped through the cylinder during the selected skipped working cycles. In some implementations, the cylinders are deactivated by holding associated intake and exhaust valves closed such that an air charge is not present in the working chamber during the selected skipped working cycles. 1. A method of controlling the operation of an internal combustion engine having a plurality of working chambers , each working chamber being generally arranged to operate in a succession of working cycles , the method comprising:operating the engine in a skip fire operational mode, wherein during operation of the engine in the skip fire operational mode, a selected one of the working chambers will be fired during some working cycles and not fired during other working cycles; andadjusting a setting of a component that affects a torque output associated with a selected firing of the selected working chamber based at least in part on a current skip/fire firing history of the selected working chamber.2. A method as recited in wherein the internal combustion engine is a spark ignition internal combustion engine and the adjusted setting is spark timing.3. A method as recited in wherein the adjusting setting controls the amount of fuel injected into the selected working chamber in association with the selected firing.4. A method as recited in claim 1 , wherein each working chamber has an associated intake valve and an associated exhaust valve claim 1 , the method further comprising:deactivating the associated working chamber during the skipped working cycles by holding the intake and exhaust valves closed such that air is not pumped through ...

VALVETRAIN WITH VARIABLE VALVE ACTUATION

A method of providing a rocker arm set for a valvetrain includes providing a first intake rocker arm, a second intake rocker arm and a first exhaust rocker arm. The first intake rocker arm is configured as a switching rocker arm for a first intake valve on a first cylinder. The second intake rocker arm is for a second intake valve on a second cylinder. The second rocker arm is configured to operate in a normal Otto cycle mode. The first exhaust rocker arm is provided for a first exhaust valve on the second cylinder. The first intake rocker arm operates in one of an LIVC or EIVC mode where the first intake rocker arm is configured to open or close at a different time compared to the second intake valve. The first exhaust rocker arm operates in a cylinder deactivation mode. 146-. (canceled)47. A method of providing a rocker arm set for a valvetrain having a plurality of cylinders , the method comprising:providing a first intake rocker arm for a first intake valve on a first cylinder of the plurality of cylinders;providing a second intake rocker arm configured as a switching rocker arm for a second intake valve on the first cylinder, the second intake rocker arm selectively switchable between (i) a normal mode and (ii) an added motion mode;providing a first exhaust rocker arm configured as a switching rocker arm for a first exhaust valve on a second cylinder of the plurality of cylinders, the first exhaust rocker arm selectively switchable between (i) a normal mode and (ii) an added motion mode; andproviding a second exhaust rocker arm for a second exhaust valve on the second cylinder.48. The method of claim 47 , wherein the first intake rocker arm is a standard rocker arm configured to operate in a normal Otto cycle mode.49. The method of claim 48 , wherein the second exhaust rocker arm is a standard rocker arm configured to operate in a normal Otto cycle mode.50. The method of claim 47 , wherein the added motion mode of the second intake rocker arm is one of a late ...

A CONTROLLER AND A METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE

Aspects of the present invention relate to a controller for controlling operation of an internal combustion engine, a control system, an internal combustion engine, a vehicle, a method and a non-transitory computer readable medium. The controller is configured to, during fuel cut, cause opening of an intake valve of a cylinder of the internal combustion engine to enable air having a mass to enter the cylinder. The mass is below a first range of masses which enable the internal combustion engine to provide combustion torque. 115-. (canceled)16. A controller for controlling operation of an internal combustion engine , the controller being configured to:during fuel cut, cause opening of an intake valve of a cylinder of the internal combustion engine to enable air having a mass to enter the cylinder; whereinthe mass is below a first range of masses which enable the internal combustion engine to provide combustion torque.17. The controller according to claim 16 , comprisingan electronic processor having an electrical input for receiving a request signal; andan electronic memory device electrically coupled to the electronic processor and having instructions stored therein,the processor being configured to access the memory device and execute the instructions stored therein.18. The controller according to claim 16 , wherein the controller is configured to cause opening of the intake valve to enable a mass of air in the first range of masses to enter the cylinder during all intake strokes of the cylinder in which fuel is combusted during a next power stroke of the cylinder.19. The controller according to claim 16 , whereinduring fuel cut, the controller is configured to cause opening of the intake valve during each intake stroke of the cylinder to enable a mass of air in a second range of masses to enter the cylinder during each intake stroke; anda largest mass in the second range of masses is smaller than a smallest mass in the first range of masses.20. The controller ...

SYSTEMS AND METHODS FOR A SPLIT EXHAUST ENGINE SYSTEM

Methods and systems are provided for operating a split exhaust engine system that provides blowthrough air and exhaust gas recirculation to an intake passage via a first exhaust manifold and exhaust gas to an exhaust passage via a second exhaust manifold. In one example, one or more valves of a set of first exhaust valves coupled to the second exhaust manifold may be deactivated in response to select engine operating conditions, while maintaining active all valves of a set of second exhaust valves coupled to the first exhaust manifold. The select engine operating conditions may include one or more of a deceleration fuel shut-off condition, a part throttle condition, and a cold start condition. 1. A method for an engine , comprising: flowing intake air from an intake passage to a first exhaust manifold coupled to a set of first exhaust valves via a first passage, and then flowing the intake air to an intake manifold of the engine, downstream of an intake throttle, via a second passage coupled between the first exhaust manifold and the intake manifold;', 'exhausting combusted gases from the engine cylinders via a set of second exhaust valves to a second exhaust manifold coupled to an exhaust passage; and', 'deactivating one or more valves of the set of second exhaust valves., 'in response to select engine operating conditions,'}2. The method of claim 1 , wherein each cylinder of the engine cylinders includes one first exhaust valve of the set of first exhaust valves and one second exhaust valve of the set of second exhaust valves.3. The method of claim 1 , wherein the select engine operating conditions include a part throttle condition where a position of the intake throttle is at least partially closed.4. The method of claim 3 , wherein the deactivating one or more valves of the set of second exhaust valves includes deactivating a larger number of valves in the set of second exhaust valves as engine torque demand decreases.5. The method of claim 1 , wherein the ...

DYNAMIC SKIP FIRE TRANSITIONS FOR FIXED CDA ENGINES

A variety of methods and arrangements are described for managing transitions between operational states of an internal combustion engine during skip fire operation of the engine. 1. A method of managing transitions between operational states of an internal combustion engine having a plurality of working chambers , the method comprising: generating a firing sequence that includes one or more firing and skip commands for operating the working chambers;', 'determining whether the skip command involves a working chamber that is not capable of being deactivated; and', 'when the skip command involves a working chamber that is not capable of being deactivated, cutting the fuel to the non-deactivatable working chamber., 'operating the engine in a skip fire manner during a transition comprising2. The method of claim 1 , wherein if none of the working chambers are individually deactivatable claim 1 , when the transitioning between the first displacement and the second displacement begins claim 1 , all skip commands are actuated as fuel cut commands.3. The method of claim 1 , wherein if none of the working chambers are individually deactivatable claim 1 , all skip commands are actuated as fuel cut commands.4. The method of claim 1 , further comprising adjusting operational parameters of the internal combustion engine to control output of the internal combustion engine to be substantially equal to a desired engine output.5. The method of claim 4 , wherein adjusting comprises controlling s a fuel injector of each working chamber in order to cut fuel to non-deactivatable working chambers.6. The method of claim 1 , wherein the internal combustion engine is a lean-burning engine.7. The method of claim 6 , wherein the internal combustion engine is a fixed-CDA engine in which the working chambers are not individually deactivatable.8. An engine controller to manage transitions between operational states of an internal combustion engine having a plurality of working chambers claim 6 , ...

METHOD FOR SWITCHING, IN AN EFFICIENCY-OPTIMIZED MANNER, A FOUR-STROKE INTERNAL COMBUSTION ENGINE INCLUDING A PLURALITY OF CYLINDERS AND A FULLY VARIABLE VALVE TRAIN BETWEEN A FULL CYLINDER OPERATION AND A PARTIAL CYLINDER OPERATION

A method for operating a four-stroke internal combustion engine is provided. The internal combustion engine can be switched over between a full cylinder operation and a partial cylinder operation. The valve lift of the inlet valves of all cylinders are set temporarily to a maximum lift during the switchover between full cylinder operation and partial cylinder operation, wherein, during the switchover, in a step a), in an early switchover phase, the valve lift is increased at all cylinders and, at the same time, the time of the maximum valve lift is adjusted in the early direction by means of a phase adjuster and/or, in a step b), in a late switchover phase, the valve lift is reduced at least at the cylinders which are to continue to run after the switchover and, at the same time, the time of the maximum valve lift is adjusted in the late direction. 1. A method for operating an internal combustion engine , the method comprising:providing a four-stroke internal combustion engine having a plurality of cylinders, a fully variable valve train, and at least one phase adjuster for changing a time of a maximum valve lift of inlet valves, wherein the four-stroke internal combustion engine is configured so as to be capable of being switched over between a full cylinder operation and a partial cylinder operation, wherein at least one of the cylinders is switched off in the partial cylinder operation and, to this end, valves of the at least one cylinder are moved into a zero lift position and remaining ones of the cylinders continue to run;setting a valve lift of the inlet valves of all of the cylinders temporarily to a maximum lift during a switchover between the full cylinder operation and the partial cylinder operation; andperforming at least one of step a) and step b) during the switchover of the four-stroke internal combustion engine between the full cylinder operation and the partial cylinder operation, wherein in step a), in an early switchover phase, the valve lift is ...

JUMPING CYLINDER DEACTIVATION MODES TO AVOID ENGINE RESONANCE

A method for jumping cylinder deactivation (“CDA”) modes to avoid a primary powertrain resonant frequency in a six-cylinder diesel engine-powered machine comprises operating an engine between an idled condition and a first engine speed limit in one of a two-cylinder CDA mode or a four-cylinder CDA mode. The method operates the engine between the first engine speed limit and a second engine speed limit in a three-cylinder CDA mode. The first engine speed limit is an engine speed below which the two-cylinder or four-cylinder CDA mode causes the machine to operate below a primary powertrain resonant frequency and also above which the three-cylinder CDA mode causes the machine to operate above the primary powertrain resonant frequency, thus avoiding the primary powertrain resonant frequency during operation. A CDA mode can be selected above the second engine speed limit to operate the machine above the primary powertrain resonant frequency. 1. A method for jumping cylinder deactivation (“CDA”) modes to avoid a primary powertrain resonant frequency in a six-cylinder diesel engine-powered machine , comprising:operating an engine between an idled condition and a first engine speed limit in one of a two-cylinder CDA mode or a four-cylinder CDA mode, wherein CDA mode deactivates a number of cylinders by shutting off fueling and closing intake and exhaust valves, wherein the two-cylinder CDA mode deactivates two engine cylinders and fires the remaining cylinders, and wherein the four-cylinder CDA mode deactivates four engine cylinders and fires the remaining cylinders; andoperating the engine between the first engine speed limit and a second engine speed limit in a three-cylinder CDA mode, wherein the three-cylinder CDA mode deactivates three engine cylinders and fires the remaining cylinders,wherein the first engine speed limit is an engine speed below which the two-cylinder or four-cylinder CDA mode causes the machine to operate below a primary powertrain resonant frequency ...

APPARATUS AND METHOD FOR CONTROLLING DEACTIVATION OF CYLINDERS IN ENGINE

An apparatus and method for controlling deactivation of cylinders in an engine may include a sensor that measures pressure inside an intake manifold of the engine, an oil control valve (OCV) that deactivates the cylinders in the engine, and a controller that is configured to control the OCV to deactivate a specific cylinder in the engine, based on the pressure inside the intake manifold. 1. An apparatus for controlling deactivation of cylinders in an engine , the apparatus comprising:a sensor configured to measure pressure inside an intake manifold of the engine;an oil control valve (OCV) configured to deactivate the cylinders in the engine; anda controller configured to control the OCV to deactivate a predetermined cylinder among the cylinders in the engine, based on the pressure inside the intake manifold.2. The apparatus of claim 1 , wherein the controller is configured to:set a plurality of reference ranges and a number of cylinders to be deactivated for each reference range of the plurality of reference ranges; anddetermine a number of cylinders to be deactivated, based on a reference range in which the pressure inside the intake manifold is included.3. The apparatus of claim 2 , wherein the controller is configured to:determine an order in which all the cylinders in the engine are deactivated, to prevent the predetermined cylinder from being continually deactivated.4. The apparatus of claim 3 , wherein the controller is configured to:periodically modify the order in which all the cylinders in the engine are deactivated.5. The apparatus of claim 4 , wherein the controller is configured to:set a plurality of groups based on a firing order of the cylinders in the engine; andperiodically modify an order of the groups.6. The apparatus of claim 5 , wherein the controller is configured to:periodically modify an order in which cylinders in each group of the plurality of groups are deactivated.7. The apparatus of claim 6 , wherein the controller is configured to:modify ...

Variable cylinder engine

A variable cylinder engine is provided. The engine includes an engine body having a plurality of cylinders, a cooling mechanism for cooling the engine body, and a controller for controlling the cooling mechanism and changing a number of active cylinders according to an operating state of the engine. The controller reduces the number of active cylinders in a reduced-cylinder operating range set within a partial engine load range, and in a first reduced-cylinder range set within a high load part of the reduced-cylinder operating range, the controller improves a cooling performance of the cooling mechanism compared with that in a second reduced-cylinder range set within a low load part of the reduced-cylinder operating range.

ENGINE VALVE DEACTIVATION SYSTEM

A system and method comprising four valves per cylinder of a multi-cylinder engine is provided to control cylinder intake and exhaust valves independently from other cylinders in response to engine operating conditions. The engine valve deactivation system for the engine may comprise two or more cylinders wherein each cylinder has two exhaust valves and two inlet valves. The system and method may allow for cylinder deactivation and/or high swirl to both be delivered. 1. An engine valve deactivation system for an engine comprising:two or more cylinders, each cylinder having two exhaust valves and two inlet valves;at least one cylinder of the engine being a deactivatable cylinder wherein each deactivatable cylinder has one inlet valve selectively deactivated by means of a first supply of pressurized fluid and both exhaust valves and the other one of the inlet valves are selectively deactivated by means of a second supply of pressurized fluid.2. The system of claim 1 , in which each cylinder further comprises a device to selectively deactivate a first one of the two inlet valves so as to keep the respective inlet valve closed claim 1 ,each deactivatable cylinder has respective deactivation devices to selectively deactivate both exhaust valves and a second one of the two inlet valves so as to keep the respective second inlet valve and both exhaust valves closed wherein a first electronically controlled valve is arranged to control the flow of pressurized fluid to the devices for deactivating the first inlet valve of each cylinder, a second electronically controlled valve is arranged to control the flow of pressurized fluid to the devices for deactivating the second inlet valve and both of the exhaust valves and an electronic controller is arranged to control the operation of the first and second electronically controlled valves.3. The system of claim 2 , wherein the electronic controller is operable in a first mode of operation to control the first electronically ...

CDA SYSTEM AND CONTROL METHOD FOR THE SAME

A cylinder deactivation (CDA) system and a control method for the same and the CDA system may include a plurality of cylinder; a cylinder deactivation (CDA) apparatus selectively are configured to de-activate an operation of an exhaust valve of the partial cylinder among the plurality of cylinders; a connection pipe connecting the de-activated cylinder to the normally operated cylinder among the plurality of cylinders; an auxiliary valve apparatus configured for opening or closing the connection pipe to supply a compressed air of the de-activated cylinder among the plurality of cylinders to the normally operated cylinder; a vehicle operation state measuring device configured for measuring a vehicle operation state to output a corresponding signal; and a controller configured for controlling operations of the CDA apparatus and the auxiliary valve apparatus depending on the corresponding signal of the vehicle operation state measuring device. 1. A cylinder deactivation (CDA) system comprising:a plurality of cylinders;a cylinder deactivation (CDA) apparatus configured to selectively configured to de-activate an operation of an exhaust valve of a predetermined cylinder among the plurality of cylinders;a connection pipe connecting a de-activated cylinder to a normally operated cylinder among the plurality of cylinders;an auxiliary valve apparatus configured for opening or closing the connection pipe to supply a compressed air of the de-activated cylinder among the plurality of cylinders to the normally operated cylinder;a vehicle operation state measuring device configured for measuring a vehicle operation state to output a corresponding signal; anda controller configured for controlling operations of the CDA apparatus and the auxiliary valve apparatus depending on the corresponding signal of the vehicle operation state measuring device.2. The CDA system of claim 1 , wherein the auxiliary valve apparatus is configured to be opened during an expansion stroke of the de- ...

SYSTEMS AND METHODS FOR FUEL POST INJECTION TIMING

Methods and systems are provided for fuel post injection for diesel particulate filter (DPF) regeneration. In one example, a method may include, responsive to a request for generating exotherms in an exhaust system of an engine while combustion is discontinued in at least one cylinder of the engine, injecting fuel into a cylinder within a threshold crank angle range around top dead center (TDC) of a compression stroke of the cylinder and also within the threshold crank angle range around top dead center of an exhaust stroke of the cylinder, the threshold crank angle range extending from no more than 40 crank angle degrees before TDC to no more than 40 crank angle degrees after TDC. In this way, fuel post injections may be injected +/−40 crank angle degrees after TDC of the compression and exhaust strokes to increase exhaust temperature while avoiding wall wetting and oil-in-fuel dilution. 1. A method , comprising:responsive to a request for generating exotherms in an exhaust system of an engine while combustion is discontinued in at least one cylinder of the engine, injecting fuel into a cylinder within a threshold crank angle range around top dead center of a compression stroke of the cylinder and also within the threshold crank angle range around top dead center of an exhaust stroke of the cylinder, the threshold crank angle range extending from no more than 40 crank angle degrees before top dead center to no more than 40 crank angle degrees after top dead center.2. The method of claim 1 , further comprising:adjusting an air flow through the engine responsive to the request for generating the exotherms in the exhaust system of the engine.3. The method of claim 2 , wherein injecting fuel into the cylinder within the threshold crank angle range around top dead center of the compression stroke of the cylinder and also within the threshold crank angle range around top dead center of the exhaust stroke of the cylinder comprises:determining an amount of fuel to inject ...

METHOD AND SYSTEM FOR APPLYING ENGINE KNOCK WINDOWS

Methods and systems are disclosed for operating an engine that includes a knock control system that may determine contributions of individual noise sources to an engine background noise level. The contributions of the individual noise sources may be the basis for establishing the presence or absence of knock in one or more engine cylinders. 1. An engine operating method , comprising:ceasing to supply fuel to a first engine cylinder via a controller;adjusting open timing of a knock window of the first engine cylinder to span a timing of a closing of a device of a second cylinder via the controller while fuel delivery to the first engine cylinder is ceased; andsampling output of a knock sensor during the knock window via the controller.2. The method of claim 1 , further comprising generating an engine knock background noise level via sampling output of the knock sensor.3. The method of claim 2 , further comprising generating an indication of engine knock via the engine knock background noise level.4. The method of claim 1 , where the device is a port fuel injector claim 1 , and where the engine is rotating when ceasing to supply fuel to the first engine cylinder.5. The method of claim 1 , where the device is a direct fuel injector.6. The method of claim 1 , where the device is a poppet valve.7. The method of claim 6 , where the poppet valve is an intake valve.8. An engine operating method claim 6 , comprising:ceasing to supply fuel to all engine cylinders via a controller;adjusting poppet valve timing of all engine cylinders such that intake and exhaust valves do not close while knock windows of all engine cylinders are open via the controller while fuel delivery to all engine cylinders is ceased; andsampling output of one or more knock sensors while knock windows of all engine cylinders are open via the controller.9. The method of claim 8 , where four knock sensors are sampled during a cycle of an engine.10. The method of claim 8 , where adjusting poppet valve timing ...

DEVICE AND METHOD FOR CONTROLLING ENGINE

A controller increases an actual oil pressure up to a transient oil pressure (an actuating oil pressure) and then supplies oil adjusted to have the transient oil pressure (the actuating oil pressure) to valve stopping mechanisms to actuate the valve stopping mechanisms. The controller, when actuating the valve stopping mechanisms, starts increase in an intake filling amount when the actual oil pressure increases up to a predetermined determination value set at the transient oil pressure (the actuating oil pressure) or lower. 1. A device for controlling an engine including a plurality of cylinders and switching between all-cylinder operation , in which all the cylinders are operated , and deactivated cylinder operation , in which some of the cylinders are deactivated , the device comprising:a valve stopping mechanism configured to actuate to switch the engine from the all-cylinder operation to the deactivated cylinder operation when oil pressurized up to a predetermined actuating oil pressure is supplied;an oil supply device configured to discharge oil to a hydraulic passage connected to the valve stopping mechanism and to adjust an oil pressure of the oil;a control valve configured to supply oil from the hydraulic passage to the valve stopping mechanism;a filling amount adjusting device configured to adjust an intake filling amount indicating an amount of gas to be supplied to each of the cylinders;a controller connected to the oil supply device, the control valve, and the filling amount adjusting device and configured to output a control signal to each of the oil supply device, the control valve, and the filling amount adjusting device to operate the engine; andan oil pressure sensor connected to the controller, and configured to detect an oil pressure of oil flowing through the hydraulic passage and to output a signal indicating a detection result to the controller,the controller outputting a control signal to the oil supply device to increase the oil pressure ...

CONTROLLER FOR VARIABLE VALVE MECHANISM

An internal combustion engine is provided with a plurality of cylinders, air intake valves provided to each of the cylinders, and a variable valve actuation mechanism for varying the valve actuation of the air intake valves. A motor drives the variable valve actuation mechanism. A motor controller controls the motor. The internal combustion engine is capable of operating in a cylinder deactivation mode, in which the air intake valves of some of the cylinders are kept shut. When the internal combustion engine is reactivated from the cylinder deactivation mode, the motor controller executes an air intake amount correction process, in which the opening duration of the air intake valves is temporarily increased, thereby increasing the amount of air taken in by operating cylinder for which the air intake valves have been opened or closed even during the cylinder deactivation mode. 1. A controller for a variable valve actuation mechanism applied to an internal combustion engine , wherein the engine includes a plurality of cylinders , a plurality of intake valves each provided in one of the cylinders , and a variable valve actuation mechanism , which changes valve actuation of the intake valves , and the engine is operable in a cylinder deactivation mode , which keeps the intake valves of some of the cylinders closed , the controller comprising:a control section that is configured to control the valve actuation in accordance with an engine output requirement, whereineven during execution of the cylinder deactivation mode, the intake valve of an operating one of the cylinders is opened and closed,the control section is configured to execute an intake amount correction process, which controls the valve actuation of the operating cylinder such that, when the internal combustion engine is reactivated from the cylinder deactivation mode, opening duration of the intake valve of the operating cylinder is temporarily increased as compared to the opening duration in a case in which ...

Throttle device

Provided is a throttle device including a total of two throttle units in each two cylinders in an engine 1, each of the throttle units having a unit body having intake air passages corresponding to four cylinders of the engine, a throttle shaft rotatably supported by the unit body, throttle valves secured to the throttle shaft to open and close the intake air passages for the cylinders, a motor, and a deceleration mechanism decelerating rotation of a drive shaft of the motor and transmitting the decelerated rotation to the throttle shaft, in which a deceleration ratio of the deceleration mechanism provided in a first throttle unit and a deceleration ratio of the deceleration mechanism provided in a second throttle unit out of the two throttle units are different from each other.

Control Shaft for Inlet Valve Shut-Off

A control shaft of a cam shaft adjustment unit has axially spaced adjustment cams, which are designed in a first axial section of the control shaft for a continuous operation of a cylinder and in a second axial section for a cylinder shut-off. The adjustment cams for the continuous operation of a cylinder have, over the entire circumference of the cam circle, a radial extension which is greater than a zero stroke extension and the adjustment cams for the cylinder shut-off have, around their circumference, a shut-off section of the cam circle with a radial extension which is less than or equal to the zero stroke extension. The control shaft has a stop that reduces the rotation in both circumferential directions and functions as the calibration point for an engine electronics system.

CYLINDER DE-ACTIVATION CONTROL METHOD AND CYLINDER DE-ACTIVATION SYSTEM

A cylinder de-activation control method and a cylinder de-activation system are disclosed. A cylinder de-activation control method of an engine having an odd number of cylinders may include: receiving operation state signals of a vehicle; determining whether the operation state signals correspond to a CDA mode driving region of a CDA apparatus; preparing a CDA driving mode of the CDA apparatus when the operation state signals correspond to the CDA mode driving region; and performing a CDA mode conversion on each cylinder. 1. A cylinder de-activation control method of an engine having an odd number of cylinders , the method comprising:receiving operation state signals of a vehicle;determining whether the operation state signals correspond to a CDA mode driving region of a CDA apparatus;preparing a CDA driving mode of the CDA apparatus when the operation state signals correspond to the CDA mode driving region; andperforming a CDA mode conversion on each cylinder,wherein the performing of the CDA mode conversion comprises:selecting a cylinder to be primarily converted in to a CDA mode;deactivating the selected cylinder; andreleasing deactivation of the selected cylinder after the selected cylinder is deactivated;wherein in the deactivating the selected cylinder, remaining cylinders except for the selected cylinder are ignited,in the releasing deactivation of the selected cylinder, the remaining cylinders except for the selected cylinder are deactivated, andwhile the selected cylinder is deactivated and ignited, the number of deactivated cylinders is equal to the number of ignited cylinders.2. The cylinder de-activation control method of claim 1 , wherein the deactivating of the selected cylinder comprises:applying power to an oil control valve (OCV) such that an intake valve of the selected cylinder becomes a zero lift and blocks air from being introduced to the selected cylinder, andthe releasing of deactivation of the selected cylinder comprises:releasing the ...

SWITCHING ROCKER ARM FOR INTERNAL EXHAUST GAS RECIRCULATION

A switching rocker arm constructed in accordance to one example of the present disclosure includes an outer arm, an inner arm, a latch, an inner roller and a first torsion spring. The outer arm has a pair of outer arm portions and a connecting arm extending therebetween. The connecting arm includes an outwardly extending tab. The inner arm is pivotally secured to the outer arm and has an outwardly extending protrusion. The latch is configured to selectively extend to engage the outwardly extending tab. The inner roller and bearing is configured on the inner arm. The first torsion spring is disposed between the outer arm and the inner arm. A first end is engaged to the connecting arm and is restrained from outward movement by the outer arm and restrained from inward movement by the outwardly extending tab. A second end is restrained by the outwardly extending protrusion. 1. A switching rocker arm comprising:an outer arm having a pair of outer arm portions and a connecting arm extending therebetween;an inner arm pivotally secured to the outer arm and having an outwardly extending protrusion;a latch slidably connected to the inner arm and configured to selectively extend to engage the outer arm;an inner roller and bearing configured on the inner arm;a pair of outer rollers mounted on the outer arm; anda first torsion spring disposed between the outer arm and the inner arm, the first torsion spring having a first end and a second end, wherein the first end is engaged to the connecting arm and is restrained from outward movement by an outer arm portion, and the second end is restrained by the outwardly extending protrusion.2. The switching rocker arm of wherein the first torsion spring includes an inner diameter that is received by a first post extending from the inner arm.3. The switching rocker arm of claim 2 , further comprising a second torsion spring disposed between the outer arm and the inner arm claim 2 , the second torsion spring having a first end and a second ...

Method and System for Diesel Cylinder Deactivation

A system and method for cylinder deactivation in a multi-cylinder diesel engine comprises pumping air in to an intake manifold of the diesel engine using a turbocharger. Air is pumped in to the intake manifold using an intake air assisting device. And, fuel injection is selectively deactivated to at least one of the cylinders in the diesel engine. An intake valve and an exhaust valve is selectively deactivated for the at least one of the cylinders of the diesel engine. 136-. (canceled)37. A pollution management system for a diesel engine , comprising: piston connected to a crankshaft;', 'fuel injector connected to an injection controller;', 'intake valve connected to an intake valve controller; and', 'exhaust valve connected to an exhaust valve controller;, 'a diesel engine comprising a plurality of combustion cylinders, each of the plurality of combustion cylinders comprising a respectivea load monitoring sensor; a catalyst for filtering pollution from an exhaust stream; and', 'a sensor for measuring a pollution level in the exhaust stream; and, 'an exhaust system connected to the exhaust valves, the exhaust system comprising receive load data;', 'determine a load on the engine;', 'determine an engine output requirement based on the load on the engine;', 'receive pollution level sensor data from the sensor;', 'determine a pollution level in the exhaust stream;', 'determine whether the pollution level exceeds a pollution threshold;', select at least one of the plurality of combustion cylinders for deactivation;', 'command the injection controller to deactivate the respective fuel injector for the at least one of the selected combustion cylinders;', 'command the intake valve controller to deactivate the respective intake valve for the at least one of the selected combustion cylinders, and', 'command the exhaust valve controller to deactivate the respective exhaust valve controller for the at least one of the selected combustion cylinders; and, 'when the pollution ...

Four-cylinder engine with two deactivatable cylinders

A method for operating an internal combustion engine is provided. The method includes during a first operating condition, operating two primary cylinders and two secondary cylinders to perform combustion, the two primary and secondary cylinders arranged in an inline configuration, the two primary cylinder adjacent to one another, the two secondary cylinders adjacent to one another, and the secondary cylinders positioned 175°-185° out of phase relative to the two primary cylinders and during a second operating condition, selectively deactivating the two secondary cylinders to perform combustion in only the two primary cylinders.

NOISE/VIBRATION REDUCTION CONTROL

Systems and methods for reducing noise or vibration generated by an internal combustion engine are described. An engine controller is arranged to operate the working chambers of the engine in a cylinder output level modulation manner. A noise/vibration reduction unit actively control of a device that is not a part of the powertrain. The device is controlled in a feed forward manner to alter an NVH characteristic of the vehicle in a desired manner based at least in part on a characteristic of the cylinder output level modulation operation of the engine. 1. A method of mitigating or adjusting an NVH characteristic of a vehicle having a powertrain having an engine during cylinder output level modulation operation of the engine , the engine including a plurality of working chambers , the method comprising:operating the engine in a cylinder output level modulation mode at a first effective firing fraction, wherein operation of the engine at the first effective firing fraction causes the working chambers to be fired in a repeating firing sequence having a defined repeating minimum cycle length that is not an integer factor or multiple of the number of working chambers in the engine; andactively controlling a device that is not a part of the powertrain in a feed forward manner based at least in part on a current engine speed and at least one of the minimum repeating pattern length, the first effective firing fraction or a then current operational engine order, to alter the NVH characteristic of the vehicle in a desired manner.2. A method as recited in claim 1 , wherein a variable filter is used to shape the response of the device during the cylinder output level modulation operation of the engine at the first effective firing fraction claim 1 , the method further comprising:inputting selected filter coefficients to the variable filter, wherein the filter coefficients are selected based at least in part on the engine order.3. A method as recited in claim 2 , further ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control device is configured to read a required operation point of the internal combustion engine at the moment of restart following after intermittent stoppage, and to execute, when it is determined that the required operation point belongs to a reduced-cylinder operation allowed region and also to a reduced-cylinder operation restricted region which lies on a high load side of the reduced-cylinder operation allowed region, an all-cylinder operation and then move into a reduced-cylinder operation. When it is determined that the required operation point belongs to the reduced-cylinder operation allowed region but not to the reduced-cylinder operation restricted region, the control device is configured to switch the engine to the reduced-cylinder operation without execution of the all-cylinder operation. 1. A control device for an internal combustion engine having a plurality of cylinders , the internal combustion engine being capable of executing an operation at a predetermined target air-fuel ratio selectively either a reduced-cylinder operation where a part of the plurality of cylinders are operated and a rest of the plurality of cylinders are halted or a particular operation where more cylinders are operated than in the reduced-cylinder operation , and being capable of restarting following after intermittent stoppage ,the control device being configured by a computer executing a computer program to control the internal combustion engine so that the reduced-cylinder operation is executed in a case that a required operation point of the internal combustion engine belongs to a predetermined reduced-cylinder operation allowed region, whereinthe control device is further configured by the computer executing the computer program to, in a case that the required operation point of the internal combustion engine belongs to the reduced-cylinder operation allowed region at a moment of restart following after the intermittent stoppage of the internal combustion engine, ...

FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL

Engine controllers and methods are described that facilitate skip fire control of an internal combustion engine. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The engine controller selects an operational firing fraction from a set of available firing fractions. A firing controller then directs cylinder firings in a skip fire manner that delivers the selected operational firing fraction. The firing controller includes an accumulator that helps smooth transitions between different firing fractions. 1. An engine controller suitable for directing operation of an engine in a skip fire manner , the engine controller comprising:a firing fraction determining unit arranged to select an operational firing fraction from a set of available firing fractions; anda firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction, wherein the firing controller includes an accumulator that helps smooth transitions between different firing fractions.2. An engine controller as recited in wherein the accumulator is configured to track a difference between firings that have been directed and firings that have been requested.3. An engine controller as recited in wherein the accumulator tracks a portion of a firing that has been requested but not yet directed.4. An engine controller as recited in suitable for use with an engine having a plurality of working chambers claim 1 , each working chamber having at least one associated intake valve and at least one associated exhaust valve claim 1 , wherein:for each skipped working cycle, the engine controller is arranged to cause at least one of the associated intake and exhaust valves to not open during skipped working cycles to thereby prevent pumping air through the associated working chamber during the skipped working cycle.5. An engine controller as recited in wherein the ...

DYNAMIC VALVE CONTROL IN A SKIP FIRE CONTROLLED ENGINE

Various methods and arrangements for improving fuel economy and noise, vibration, and harshness (NVH) in a skip fire controlled engine are described. An engine controller dynamically selects a gas spring type for a skipped firing opportunity. Determination of the skip/fire pattern and gas spring type may be made on a firing opportunity by firing opportunity basis. 1. A method of controlling an internal combustion engine having a plurality of cylinders during skip fire operation of the engine , each cylinder including at least one associated intake valve and at least one associated exhaust valve , the method comprising:(i) determining that a first skipped working cycle in a first selected cylinder will not be fired;(ii) actuating a first intake valve associated with the first selected cylinder such that the first intake valve is open during at least a portion of an intake stroke of the first skipped working cycle;(iii) holding the at least one exhaust valve associated with the first selected cylinder closed during an exhaust stroke associated with the first skipped working cycle; and(iv) actuating the first intake valve during at least a portion of the intake stroke of a first fired working cycle that occurs after the first skipped working cycle in the first selected cylinder, the first fired working cycle being the first working cycle in the selected cylinder that is fired after the first skipped working cycle.2. A method as recited in wherein the first skipped working cycle immediately follows an earlier fired working cycle in the first selected cylinder.3. A method as recited in further comprising repeating (i)-(iv) for each skipped working cycle that immediately follows an earlier fired working cycle in the same cylinder.4. A method as recited in wherein at least one additional skipped working cycle occurs in the first selected cylinder between the first skipped working cycle and the first fired working cycle.5. A method as recited in wherein:the first intake ...

SYSTEMS AND METHODS FOR A SPLIT EXHAUST ENGINE SYSTEM

Methods and systems are provided for operating a split exhaust engine system that provides blowthrough air and exhaust gas recirculation to an intake passage via a first exhaust manifold and exhaust gas to an exhaust passage via a second exhaust manifold. In one example, the engine system may be installed in a hybrid vehicle, and, in response to a request to restart the engine while the vehicle is being propelled via motor torque only, the engine may be rotated unfueled via the motor torque at less than cranking speed while at least partially opening a valve disposed in a passage coupled between the first exhaust manifold and the intake passage. In another example, in response to the request to restart the engine, all exhaust valves of a second set of exhaust valves coupled to the second exhaust manifold may be deactivated. 1. A method , comprising: deactivating a first set of exhaust valves coupled exclusively to a first exhaust manifold coupled to an exhaust passage; and', 'circulating gases through engine cylinders and to an intake passage via a second set of exhaust valves coupled exclusively to a second exhaust manifold., 'while propelling a hybrid vehicle via motor torque2. The method of claim 1 , wherein the deactivating the first set of exhaust valves and circulating gases through the engine cylinders is responsive to a request to restart an engine of the hybrid vehicle via combusting fuel at engine cylinders of the engine.3. The method of claim 2 , wherein the deactivating the first set of exhaust valves and circulating gases through the engine cylinders is further responsive to an intake manifold pressure of the engine being greater than a threshold pressure.4. The method of claim 3 , further comprising claim 3 , after the intake manifold pressure is higher than the threshold pressure claim 3 , resuming cylinder fuel injection to restart the engine.5. The method of claim 4 , further comprising claim 4 , in response to a temperature of a catalyst disposed ...