Способ (варианты) и система для обеспечения отсечки топлива при замедлении движения автомобиля

Изобретение относится к способам и системам для управления двигателем транспортного средства в целях регенерации сажевого фильтра при отсечке топлива в режиме замедления движения автомобиля. Предложены способы и системы для управления продолжительностью процедуры отсечки топлива при замедлении движения автомобиля - процедуры ОТЗ (DFSO, Deceleration Fuel Shut-Off). Согласно одному примеру, способ может содержать регулирование продолжительности ОТЗ (DFSO) исходя из изменения температуры сажевого фильтра. Технический результат – улучшение регенерации сажевого фильтра. 3 н. и 17 з.п. ф-лы, 6 ил.

СПОСОБ И СИСТЕМА ДЛЯ ОПРЕДЕЛЕНИЯ ДИСБАЛАНСА ТОПЛИВНО-ВОЗДУШНОЙ СМЕСИ

Способ и система для управления двигателем

A method of controlling a vehicle assembly

METHOD FOR MAPPING THE QUALITY OF A REGENERATION OF A PARTICULATE FILTER

Integrated optimization and control of an engine and aftertreatment system

An engine and one or more aftertreatment subsystems integrated into one system for optimization and control. At least one controller may be connected to the engine and the one or more aftertreatment subsystems. The controller may contain and execute a program for the optimization and control of the one system. Controller may receive information pertinent to the engine and the one or more aftertreatment subsystems for the program. The controller may prescribe setpoints and constraints for measured variables and positions of actuators according to the program to aid in effecting the optimization and control of the one system.

СПОСОБ УПРАВЛЕНИЯ ДВИГАТЕЛЕМ (ВАРИАНТЫ) И СИСТЕМА ТРАНСПОРТНОГО СРЕДСТВА

Изобретение может быть использовано в двигателях внутреннего сгорания с системами рециркуляции отработавших газов (РОГ). Способ управления двигателем заключается в том, что принимают в контроллере (12) сигнал датчика (178) перепада давления и сигнал датчика (122) давления во впускном коллекторе (44). Делают с помощью контроллера (12) заключение о наличии или отсутствии деградации системы рециркуляции отработавших газов по сигналу датчика (178) перепада давления и сигналу датчика(122) давления во впускном коллекторе (44) при эксплуатации двигателя с давлением во впускном коллекторе (44), превышающим атмосферное давление. Заключение делают на основании превышения порога сигналом датчика (178) перепада давления и дополнительно преобразуют сигнал датчика (178) перепада давления в перепад давления. Регулируют с помощью контроллера (12) исполнительный механизм (163), подсоединенный к двигателю (10) и контроллеру (12), соответственно сделанному заключению. Раскрыты вариант способа управления двигателем ...

СИСТЕМА И СПОСОБ УПРАВЛЕНИЯ ДВИГАТЕЛЕМ

STEUERSYSTEM UND VERFAHREN ZUR KRAFTSTOFFEINSPRITZUNG DURCH VORHERSAGEN VON MOTORGERÄUSCHEN

Ein Steuersystem zur Kraftstoffeinspritzung durch Vorhersagen von Motorgeräuschen kann umfassen eine Motorgeräusch-Vorhersagevorrichtung, die eingerichtet ist, um einen vorhergesagten Motorgeräuschwert in Echtzeit durch einen vorhergesagten Motorgeräuschkoeffizienten abzuleiten, der gemäß einem aktuell gemessenen Verbrennungsdruckwert eines Motors vorgespeichert wird; und eine Verbrennungssteuerung, die eingerichtet ist, um eine Differenz zwischen dem in Echtzeit vorhergesagten Motorgeräuschwert, der durch die Motorgeräusch-Vorhersagevorrichtung abgeleitet wird, und einem Soll-Motorgeräuschwert für einen aktuellen Betriebszustand des Motors zu bestimmen, und wenn bestimmt wird, dass sich das Motorgeräusch aufgrund einer anormalen Verbrennung verschlechtert, eingerichtet ist, um den Soll-Motorgeräuschwert zu ändern, um die Kraftstoffeinspritzung gemäß dem geänderten Soll-Motorgeräuschwert zu steuern.

Method of controlling operation of an exhaust gas treatment apparatus

An engine apparatus (500, fig 1) comprises an internal combustion engine (510, fig 1) and an exhaust gas treatment apparatus (550, fig 1) having a diesel oxidation catalyst (520, fig 1) upstream of a second aftertreatment module (530, fig 1) such as a diesel particulate filter (DPF) or a selective catalytic reduction (SCR) catalyst. Where a numerical indication of an efficiency of the second aftertreatment module falls below a first threshold value, a first limit on engine speed is implemented. When an engine safe condition is reached, a primary cleaning process (regeneration) is carried out comprising injecting fuel into the engine after an engine combustion event such that the fuel passes through the engine without combusting for the fuel to combust in the diesel oxidation catalyst to increase exhaust gas temperature in the diesel oxidation catalyst by a target amount, and removing the first limit on engine speed and targeting an engine speed set point, which is at a higher speed than ...

Method for operating an internal combustion engine

Die Erfindung betrifft ein Verfahren zum Betreiben einer Brennkraftmaschine während eines beliebigen Fahrbetriebs und insbesondere eines.definierten gesetzlichen Zyklus, wobei die Brennkraftmaschine zumindest eine Abgasnachbehandlungseinrichtung mit verstellbarem Wirkungsgrad (z,B. durch Verändern des Reduktionsmittels) oder eine Abgasrückführeinrichtung oder alternative Stellgrößen für die Veränderung der Motorrehemissionen aufweist, wobei dem aktiven Profil zumindest ein Beobachtungsfenster zugeordnet wird. Um strenge Abgasvorschriften insbesondere im realen Fahrbetrieb einhalten zu können und gleichzeitig einen geringen Kraftstoffverbrauch zu ermöglichen, ist vorgesehen, dass innerhalb eines Fahrprofiles oder Testzyklus mindestens ein Hauptbeobachtungsfensters des Fahrprofils und ein Teilbeobachtungsfenster (F2) mit einem Start- und einem Endpunkt definiert wird, wobei während des Teilbeobachtungsfensters (F2) noch vor dem Erreichen des Endpunktes eines weiteren Hauptbeobachtungsfensters ...

Verfahren und System zum Analysieren und/oder Optimieren einer Konfiguration einer Fahrzeuggattung

Die Erfindung betrifft ein Computer-gestütztes Verfahren und ein entsprechendes System zum Analysieren und/oder Optimieren einer Konfiguration einer Fahrzeuggattung auf der Grundlage eines RDE-Testbetriebs, wobei das Verfahren die folgenden Arbeitsschritte aufweist: Aufzeichnen eines ersten Datensatzes von gemessenen Betriebsgrößen einer zu testenden Konfiguration eines Fahrzeugs der Fahrzeuggattung und von Umgebungsgrößen als Funktion einer zurückgelegten Strecke und/oder einer vergangenen Zeitdauer während eines RDE-Testbetriebs der zu testenden Konfiguration, wobei ein Teil des ersten Datensatzes ein Betriebsverhalten der zu testenden Konfiguration bei bestimmten Betriebsbedingungen charakterisiert; Simulieren eines Betriebsverhaltens einer Basiskonfiguration eines Fahrzeugs der Fahrzeuggattung mittels eines Fahrzeugmodells der Basiskonfiguration, wobei beim Simulieren ein oder mehrere Größen des ersten Datensatzes Eingangsgrößen des Fahrzeugmodells sind und ein zweiter Datensatz wenigstens ...

내연 기관을 작동시키기 위한 연료 계량

... 본 발명은, 내연 기관(2)의 작동을 위해 연료와 물을 최적으로 계량하는 것과 관련이 있으며, 내연 기관(2)의 연료 계량을 위해 직접 분사 및 흡입관 분사가 제공되어 있으며, 그리고 내연 기관(2)에는 물을 분사하기 위한 시스템이 할당되어 있는 본 발명에 따라, 연료 분사를 위해 제공된 하나 이상의 분사 밸브(16)가 물 분사를 위해서뿐만 아니라 흡입관 분사를 위해서도 사용되는 것이 제안된다.

Dieselverbrennungskraftmaschine mit einer Abgasnachbehandlungseinrichtung für einen Kraftwagen, sowie Verfahren zum Betreiben einer solchen Dieselverbrennungskraftmaschine

Dieselverbrennungskraftmaschine für einen Kraftwagen, mit einer von Abgas der Dieselverbrennungskraftmaschine durchströmbaren Abgasnachbehandlungseinrichtung (10), wobei die Abgasnachbehandlungseinrichtung wenigstens einen ein Katalysatorvolumen aufweisenden Stickoxid-Speicherkatalysator (14) zum Speichern von Stickoxiden aus dem Abgas, ein bezogen auf die Strömungsrichtung des Abgases durch die Abgasnachbehandlungseinrichtung (10) stromab des Stickoxid-Speicherkatalysators (14) angeordneten Partikelfilter (16) und ein stromab des Partikelfilters (16) angeordneten SCR-Katalysator (18) aufweist, wobei das Speichermaterial des Stickoxid-Speicherkatalysators (14) aus seltenen Erden-Verbindungen unter Verzicht auf Barium- und/oder Kalium-ausgebildet ist.

A method of controlling a vehicle assembly

A method of controlling a vehicle assembly is provided. The method comprises: determining a first time series of an operating parameter of the vehicle assembly defining a first drive cycle, the first drive cycle for testing one or more performance parameters of the vehicle assembly; identifying a plurality of ranges of the operating parameter during the first drive cycle; determining probabilities of the vehicle assembly operating in and/or transitioning between the ranges of the operating parameter during the first drive cycle; determining one or more second time series of the operating parameter defining one or more second drive cycles, the one or more second time series having a different duration from the first time series, wherein the one or more second time series are determined based on the determined probabilities of the vehicle assembly operating in and/or transitioning between the ranges of the operating parameter during the first drive cycle; and controlling the vehicle assembly ...

Method of controlling operation of an exhaust gas treatment apparatus

A method of operating an internal combustion engine

Disclosed is a method of operating an internal combustion engine 110 equipped with an aftertreatment device 280. The internal combustion engine 110 is equipped with a cylinder 125 having an exhaust gas port 220 intercepted by an exhaust valve 217. The exhaust valve 217 is actuated by means of a Variable Valve Actuation (VVA) system. The method comprises the steps of detecting an exhaust aftertreatment device 280 regeneration and closing the exhaust valve 217 early, during the aftertreatment device regeneration. The Variable Valve Actuation (VVA) system is used to provide an exhaust valve 217 actuation profile having an earlier exhaust valve 217 closure with respect to a baseline exhaust valve actuation profile. The VVA is used to control exhaust valve closing timing and thereby control the temperature of exhaust gas from the engine. An associated apparatus and computer program are also disclosed.

Combustion control method and engine system for vehicle

Method of controlling a vehicle assembly

Controlling a vehicle assembly can include determining a first time series of an operating parameter of the vehicle assembly defining a first drive cycle, the first drive cycle for testing one or more performance parameters of the vehicle assembly; identifying a plurality of ranges of the operating parameter during the first drive cycle; determining probabilities of the vehicle assembly operating in and/or transitioning between the ranges of the operating parameter during the first drive cycle; determining one or more second time series of the operating parameter defining one or more second drive cycles, the one or more second time series having a different duration from the first time series, wherein the one or more second time series are determined based on the determined probabilities of the vehicle assembly operating in and/or transitioning between the ranges of the operating parameter during the first drive cycle; and controlling the vehicle assembly and/or a further vehicle assembly ...

Vehicle control device

An ECU stores and holds in a memory unit NOx information which is information concerning NOx in an exhaust gas flowing through an exhaust system of an onboard engine of a vehicle or NOx purification by a catalyst placed in the exhaust system. The ECU includes a parameter acquisition unit that acquires an NOx parameter, which is an outflow quantity of NOx flowing out to a downstream side of the catalyst or a correlation value correlating to the outflow quantity of NOx, according to a working state of the engine, an integrated value computation unit that computes a parameter integrated value by integrating NOx parameters acquired by the parameter acquisition unit, and a storage processing unit that stores in the memory unit the parameter integrated value as the NOx information.

Verfahren und Vorrichtung zur Steigerung der Effizienz des Motorbetriebs eines Kraftfahrzeugs durch Erkennen von Temperaturveränderungen

Ein Gegenstand der Erfindung ist ein Verfahren zur Steigerung der Effizienz des Motorbetriebs eines Kranfahrzeugs mit den Schritten (s410; s420; s430) zur kontinuierlichen Feststellung eines oder mehrerer der Parameter Abgastemperatur (Texh), Kühlmitteltemperatur (Tcool) und Öltemperatur (Toil); zur kontinuierlichen Feststellung (s440) einer Veränderung mindestens einer der genannten Temperaturen (Texh; Tcool; Toil) als Basis für die Regelung der Wärmeentwicklung des genannten Motors (s240) und zur Regelung (s450) der genannten Wärmeentwicklung zur Erzielung einer gewünschten Betriebsweise des genannten Motors. Ein weiterer Gegenstand der Erfindung ist ein Computerprogrammprodukt mit Programmcode (P) für einen Computer (200; 210) zur Implementierung eines Verfahrens gemäß der Erfindung. Die Erfindung bezieht sich außerdem auf eine Einrichtung zur Steigerung der Effizienz des Motorbetriebs bei einem Kraftfahrzeug (100) und auf ein Kraftfahrzeug, das mit der genannten Einrichtung ausgestattet ...

Method for operating an internal combustion engine

Die Erfindung betrifft ein Verfahren zum Betreiben einer Brennkraftmaschine während eines beliebigen Fahrbetriebs und insbesondere eines definierten gesetzlichen Zyklus, wobei die Brennkraftmaschine zumindest eine Abgasnachbehandlungseinrichtung mit verstellbarem Wirkungsgrad (z.B. durch Verändern des Reduktionsmittels) oder eine Abgasrückführeinrichtung oder alternative Stellgrößen für die Veränderung der Motorrehemissionen aufweist, wobei dem aktiven Profil zumindest ein Beobachtungsfenster zugeordnet wird. Um strenge Abgasvorschriften insbesondere im realen Fahrbetrieb einhalten zu können und gleichzeitig einen geringen Kraftstoffverbrauch zu ermöglichen, ist vorgesehen, dass innerhalb eines Fahrprofiles oder Testzyklus mindestens ein Hauptbeobachtungsfensters des Fahrprofils und ein Teilbeobachtungsfenster (F2) mit einem Start- und einem Endpunkt definiert wird, wobei während des Teilbeobachtungsfensters (F2) noch vor dem Erreichen des Endpunktes eines weiteren Hauptbeobachtungsfensters ...

CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

METHOD OF OPERATING A COMBUSTION MODE OF AN ENGINE FOR PROMOTING HEAT AT THE EXHAUST BEING ROLLED

L'invention porte principalement sur un procédé de pilotage d'un moteur thermique de véhicule automobile, caractérisé en ce qu'il comporte: - une étape (101) de détermination, en cours de roulage, d'un écart thermique (E_th) entre une température estimée d'un système de dépollution et une température cible, - une étape (103) de détermination d'un écart d'efficacité (E eff), - une étape (104) de comparaison de cumul d'émissions d'oxydes d'azote (Cum nox) avec une valeur cible (Cib_nox), - une étape (105) de comparaison d'une quantité d'énergie reçue (Ener) par une ligne d'échappement depuis un début de roulage par rapport à un seuil d'énergie (S1), et - une étape (106) d'activation d'un mode de combustion spécifique (M spe), notamment en fonction desdites étapes de comparaison précitées.

METHOD OF OPERATING A COMBUSTION MODE OF AN ENGINE FOR PROMOTING HEAT AT THE EXHAUST BEGINNING OF ROLLING

L'invention porte principalement sur un procédé de pilotage d'un moteur thermique de véhicule automobile, caractérisé en ce qu'il comporte: - une étape (101) de comparaison d'une température mesurée (Tmes) d'une ligne d'échappement avec une température seuil (Ts), - une étape (104) de calcul de durée d'une fenêtre de dioxyde de carbone, - une étape (106, 107) de comparaison d'une puissance reçue par un système de dépollution durant ladite fenêtre de dioxyde de carbone (Pf) avec un seuil minimum (Smin) et un seuil maximum (Smax), et - une étape (108) d'activation d'un mode de combustion spécifique (M spe) dans le cas où la température de ladite ligne d'échappement est inférieure à ladite température seuil (Ts) et où ladite puissance reçue par ledit système de dépollution durant la fenêtre de dioxyde de carbone (Pf) est comprise entre ledit seuil minimum (Smin) et ledit seuil maximum (Smax).

СИСТЕМА УПРАВЛЕНИЯ ДВИГАТЕЛЕМ ДЛЯ ВОССТАНОВЛЕНИЯ КАТАЛИТИЧЕСКОГО НЕЙТРАЛИЗАТОРА

Предусмотрены способы и системы для впрыска воды во время события вывода из работы цилиндров двигателя, с тем, чтобы уменьшать потребность восстановления каталитического нейтрализатора отработавших газов после вывода из работы цилиндров. В одном из примеров вода впрыскивается в одном или более выведенных из работы цилиндров двигателя, чтобы уменьшать окисление каталитического нейтрализатора отработавших газов. Затем, во время возобновления работы цилиндров двигателя степень обогащения топливо-воздушного соотношения сгорания может уменьшаться для уменьшения повышенного расхода топлива в двигатель наряду с уменьшением выбросов NOx.

Способ (варианты) и система для обеспечения отсечки топлива при замедлении движения автомобиля

Verfahren zum Betreiben eines Verbrennungsmotors sowie Verbrennungsmotor

Die Erfindung betrifft ein Verfahren zum Betreiben eines Verbrennungsmotors (10) mit mindestens einem Brennraum (12). Der Verbrennungsmotors (10) ist über seinen Einlass (16) mit einem Luftversorgungssystem (20) und über seinen Auslass (18) mit einer Abgasanlage (40) des Verbrennungsmotors (10) verbunden. In der Abgasanlage (40) ist mindestens eine Abgasnachbehandlungskomponente (46, 48, 54, 64) zur Konvertierung von Schadstoffen im Abgas des Verbrennungsmotors (10) angeordnet. Dabei ist vorgesehen, dass der Lastzustand (P) des Verbrennungsmotors (10) sowie die streckenbezogenen Emissionen (EG/D), insbesondere die streckenbezogenen NOx-Emissionen, ermittelt werden. Nähern sich die streckenbezogenen Emissionen einem definierten Schwellenwert (EG/D) an, und ist abzusehen, dass bei unveränderten Motorparametern diese streckenbezogenen Emissionen (EG/D) nicht erfüllt werden können, wird in einem Hochlastbetrieb des Verbrennungsmotors (10) die Abgasrückführungsrate (EGR) angehoben, um die Rohemissionen ...

METHOD OF USING PARTICULATE FILTER REGENERATION QUALITY MAPPING

Method for regenerating lean NOx trap of exhaust purification system provided with lean NOx trap and selective catalytic reduction catalyst and exhaust purification system

A method for regenerating a lean NOx trap (LNT) of an exhaust purification system having the LNT and a selective catalytic reduction (SCR) catalyst includes determining whether a regeneration release condition of the LNT is satisfied; determining whether a regeneration demand condition of the LNT is satisfied; and performing regeneration of the LNT if the regeneration release condition of the LNT and the regeneration demand condition of the LNT are satisfied, wherein satisfaction of the regeneration release condition of the LNT is determined based on an NOx amount absorbed in the LNT, an NH3 amount stored in the SCR catalyst and temperature at an upstream of the SCR catalyst.

INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS AFTERTREATMENT AND CONTROL OF NITROGEN OXIDE EMISSIONS

An internal combustion engine (1), with an engine regulating device (3) and an exhaust gas aftertreatment device (16) with an SCR catalytic converter (4) for the reduction of at least one NOx component, and with a catalytic converter regulating device (6), wherein the engine regulating device (3) is prescribed a target value for an NOx mean value of the NOx component of the exhaust gases, which mean value results at an outlet point (7) of the exhaust gas aftertreatment device (16) in relation to a predefinable time period, and the engine regulating device (3) is configured at least in one operating mode to continuously calculate an NOx reference value for the catalytic converter regulating device (6) with consideration of NOx components which have already been emitted and the predefined target value, which reference value is selected in such a way that the predefined target value results at the outlet point of the exhaust gas aftertreatment device (16) at the end of the predefinable time ...

ENGINE CONTROL SYSTEM AND METHODS

Embodiments describe a method of controlling a two-stroke internal combustion engine is shown. The method includes selecting one set of two or more sets of engine parameter inputs or a weighted value of two or more sets of engine parameter inputs, determining an engine output parameter from the selection, and utilizing the determined engine output parameter to control one or more engine operations; reselecting one set of two or more sets of engine parameter inputs or a weighted value of two or more sets of engine parameter inputs during engine operation, utilizing the reselected output parameters to adjust one or more engine operations. Each set of engine parameter inputs includes a direct measurement of crankcase pressure and engine speed and optionally one or more of barometric pressure, exhaust valve position, air temperature, engine coolant temperature, exhaust temperature, boost pressure, crankshaft position and direction of rotation, humidity, fuel pressure, fuel temperature, detonation ...

METHOD AND DEVICE FOR CONTROLLING THE OPERATING MODE OF AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR FOR A MOTOR VEHICLE

AUTOMATIC ENGINE CONTROL FOR CARBON MONOXIDE CONDITIONS

An internal combustion engine is controlled in response to a location of the engine and an operational status of the engine to stop or reduce carbon monoxide emissions.

Zylinderdeaktivierung zur Katalysatortrocknung

Ein Motorsteuersystem und ein Verfahren zum Steuern eines Motorsystems werden bereitgestellt. Das Motorsteuersystem beinhaltet mindestens ein Sensormodul, das so gestaltet ist, dass es auf Basis einer festgestellten Eigenschaft in einer Abgaskomponente ein Abgaseigenschaftssignal erzeugt, und ein Zylinderreihen-Steuermodul, das kommunikationsfähig mit dem mindestens einen Sensormodul verbunden ist. Das Zylinderreihen-Steuermodul ist so gestaltet, dass es zumindest zum Teil als Reaktion auf eine auf dem Abgaseigenschaftssignal basierende Feststellung, dass eine Kohlenwasserstoff-Gewichtsmenge oberhalb eines vorab festgelegten Schwellenwerts für die Kohlenwasserstoff-Gewichtsmenge liegt, bewirkt, dass ein erstes Reihensteuersignal versendet wird, um zu bewirken, dass eine erste Reihe von Zylindern in einem Motor deaktiviert wird.

HEIRARCHICAL ENGINE CONTROL SYSTEMS AND METHODS

A system for control of an internal combustion system having subsystems, each with different response times. Subsystems may include a fuel system, an air handling system, and an aftertreatment system, each being operated in response to a set of reference values generated by a respective target determiner. Calibration of each subsystem may be performed independently. The fuel system is controlled at a first time constant. The air handling system is controlled on the order of a second time constant slower than the first time constant. The aftertreatment system is controlled on the order of a third time constant slower than the second time constant. A subsystem manager is optionally in operative communication with each target determiner to coordinate control. Generally, dynamic parameters from slower subsystems are treated as static parameters when determining reference values for controlling a faster subsystem.

VERFAHREN UND SYSTEM ZUM BESTIMMEN EINES LUFT-KRAFTSTOFF-UNGLEICHGEWICHTS

Verfahren und Systeme werden bereitgestellt, um ein Luft-Kraftstoff-Ungleichgewicht von Zylindern in einem Motor mit variablem Hubraum zu bestimmen. In einem Beispiel kann das Verfahren während eines Zylinderdeaktivierungsvorgangs sequentielles Deaktivieren jedes Zylinders einer Zylindergruppe mit zwei oder mehr Zylindern und Schätzen einer Lambda-Abweichung für jeden Zylinder nach der sequentiellen Deaktivierung jedes Zylinders der Zylindergruppe und Erlernen eines Luftfehlers für jeden Zylinder auf Grundlage der geschätzten Lambda-Abweichung umfassen.

Steuerungsvorrichtung für eine Verbrennungskraftmaschine

Steuerungsvorrichtung für eine Verbrennungskraftmaschine, mit: einer Anforderungs-Erlangungs-Einrichtung, die ein erforderliches Drehmoment und ein erforderliches Luft-Kraftstoff-Verhältnis der Verbrennungskraftmaschine erlangt; einer Erzeugungseinrichtung (28) für ein Ziel-Luft-Kraftstoff-Verhältnis, welche ein Ziel-Luft-Kraftstoff-Verhältnis durch Verringern einer Veränderungsgeschwindigkeit des erforderlichen Luft-Kraftstoff-Verhältnisses erzeugt; einer Berechnungseinrichtung (14) für eine Ziel-Luftmenge, welche eine Ziel-Luftmenge zum Realisieren des erforderlichen Drehmoments unter dem Ziel-Luft-Kraftstoff-Verhältnis, basierend auf Daten, bei denen eine Beziehung zwischen durch die Verbrennungskraftmaschine erzeugtem Drehmoment und einer Luftmenge, welche in einen Zylinder geführt wird, durch Bezugnahme auf ein Luft-Kraftstoff-Verhältnis fest eingestellt ist, berechnet; einer Luftmengen-Steuerungseinrichtung, welche ein Stellglied (4) für eine Luftmengen-Steuerung gemäß der Ziel-Luftmenge ...

Internal combustion engine control unit

Controller and control method for internal combustion engine

An internal combustion engine includes a filter, which is configured to trap particulate matter in exhaust gas, an EGR passage, which connects a section of an exhaust passage that is upstream of the filter to an intake passage, and an EGR valve, which is configured to adjust a cross-sectional flow area of the EGR passage. A controller for the internal combustion engine includes processing circuitry, which is configured to execute a limiting process of limiting an opening degree of the EGR valve such that the opening degree is likely to decrease when an amount of the particulate matter trapped by the filter is great as compared to when the amount is small.

Motorsteuerung zur Katalysatorregeneration

Es werden Verfahren und Systeme zum Einspritzen von Wasser während eines Motorzylinder-Abschaltereignisses bereitgestellt, um so einen Abgaskatalysator-Regenerationsbedarf anschließend an die Zylinderabschaltung zu verringern. Bei einem Beispiel wird Wasser bei einem oder mehreren abgeschalteten Motorzylindern eingespritzt, um die Oxidation des Abgaskatalysators zu verringern. Danach kann während einer Motorzylinder-Reaktivierung ein Anreichungsgrad eines Verbrennungs-Luft-Kraftstoff-Verhältnisses verringert werden, um den Kraftstoffmehrverbrauch für den Motor zu verringern, während die NOx-Emission verringert wird.

내연 기관의 제어 장치

... 본 발명은, 연소 제어에 열 발생률 무게 중심 위치를 사용하는 내연 기관의 제어 장치에 관한 것이다. 이 제어 장치는, 기관 냉각수온이 기준 냉각수온 이상인 경우, 열 발생률 무게 중심 위치를 기준 위치로 제어하고, 기관 냉각수온이 기준 냉각수온보다도 낮은 경우, 열 발생률 무게 중심 위치를 기준 위치보다도 진각측의 크랭크 각도로 제어한다.

Secondary air injection system

A secondary air injection system may include an engine that includes a plurality of cylinders that generate a driving torque of a vehicle by combustion of a fuel; a main line connected to an exhaust manifold or an exhaust line which is connected to the plurality of cylinders; a recirculation line which is branched from the main line and then connected to an intake manifold; an air injection line which is branched from the main line and then connected to an intake line; and an electric supercharger which is provided in the intake line.

Integrated optimization and control of an engine and aftertreatment system

An engine and one or more aftertreatment subsystems integrated into one system for optimization and control. At least one controller may be connected to the engine and the one or more aftertreatment subsystems. The controller may contain and execute a program for the optimization and control of the one system. Controller may receive information pertinent to the engine and the one or more aftertreatment subsystems for the program. The controller may prescribe setpoints and constraints for measured variables and positions of actuators according to the program to aid in effecting the optimization and control of the one system.

A method of operating an internal combustion engine

For an internal combustion engine multivariable engine torque and emission closed-loop control

METHOD AND DEVICE TO CONTROL AIR-FUEL RATIO FOR LPG ENGINE

The purpose of the present invention is to control a satisfactory air-fuel ratio for an LPG engine by determining each time the fuel composition of LPG to be used without a large cost increase. According to the present invention, in a method to control an air-fuel ratio, used by an air-fuel ratio control device for controlling a fuel spray amount under feedback control by consecutively detecting a condition of exhaust gas through an exhaust property detecting unit provided in an exhaust pipe of the LPG engine, the air-fuel ratio control device causes a variation in an output signal of the exhaust property detecting unit by performing predetermined manipulation, determines the fuel compositions of the LPG currently used by a predetermined determination method based on the variation and then reflects the same to subsequent air-fuel ratio control. COPYRIGHT KIPO 2016 (AA) Step1. identify an approach of theoretical air-fuel ratio (BB) Stop feedback control of theoretical air-fuel ratio (CC) ...

CONTROL SYSTEM FOR COMPRESSION IGNITION ENGINE

A control system for a compression ignition engine includes a combustion chamber, a throttle valve, an injector, an ignition plug, an EGR system, a sensor device and a controller. The controller includes a first mode module, a second mode module and a changing module configured to change an engine mode from a first mode to a second mode in response to a change demand. The changing module outputs signals to the throttle valve and the injector in response to the demand so that an air-fuel ratio of mixture gas becomes a stoichiometric air-fuel ratio or a substantially stoichiometric air-fuel ratio, and outputs a signal to the EGR system so that an EGR gas amount decreases more than before the demand, and when the EGR gas amount is determined to be decreased to a given amount, the changing module permits that the second mode module starts the second mode.

CONTROL APPARATUS FOR ENGINE

A control apparatus for an engine includes a rotation detector, a fuel injection device, and an output controller. The output controller calculates an emission amount of the pollutant and calculates an accumulated emission amount of a pollutant for a period of time. The output controller calculates a maximum allowable emission amount of the pollutant for a period of time. The output controller calculates a difference between the accumulated emission amount of pollutant and the maximum allowable emission amount of the pollutant. The output controller calculates a first output index by dividing the difference by the period of time. The output controller sets the allowable range for the output of the engine so that the emission amount of pollutant becomes equal to or less than the first output index. 1. A control apparatus for an engine comprising:a rotation detector measuring an engine speed;a fuel supply device supplying a fuel into a combustion chamber of the engine based on a command value for a fuel injection amount; andan output controller setting an allowable range for an output of the engine and controlling the output of the engine within the allowable range, whereinthe output controller calculates an emission amount of pollutant from the command value for the fuel injection amount for the fuel supply device and the engine speed measured by the rotation detector,the output controller calculates an accumulated emission amount of the pollutant emitted from the engine for a period of time from a first point of time to a current point of time,the output controller calculates a maximum allowable emission amount of the pollutant for a period of time from the first point of time to a second point of time at which a predetermined period of time has elapsed from the first point of time,the output controller calculates a difference between the calculated accumulated emission amount of the pollutant and the calculated maximum allowable emission amount of the pollutant,the ...

Systems and methods for on-board monitoring of a passive NOx adsorption catalyst

Methods and systems are provided for monitoring a NOx storage capacity of a passive NOx adsorption catalyst (PNA) included in an exhaust gas after-treatment system of an engine. In one example, a method may include, after an engine cold start and prior to an exhaust gas temperature reaching an upper threshold temperature, indicating degradation of the PNA based on an amount of NOx measured downstream of the PNA during a fuel cut event and while the exhaust gas temperature is between a lower threshold temperature and the upper threshold temperature. In this way, degradation of the NOx storage capacity may be inferred based on an amount of NOx released from the PNA and independent of a NOx storage measurement.

SYSTEME UND VERFAHREN ZUR WAHRSCHEINLICHKEITSTHEORETISCHEN FAHRZEUGEIGENEN DIAGNOSE

Die vorliegende Offenbarung stellt Systeme und Verfahren zur wahrscheinlichkeitstheoretischen fahrzeugeigenen Diagnose bereit. Bereitgestellt werden Verfahren und Systeme zur wahrscheinlichkeitstheoretischen fahrzeugeigenen Diagnose. In einem Beispiel kann ein Verfahren Berechnen einer Wahrscheinlichkeitsmetrik für eine Stichprobe eines gemessenen Betriebszustands einer Fahrzeugsystemkomponente, Mitteln einer Vielzahl von Wahrscheinlichkeitsmetriken einschließlich der Wahrscheinlichkeitsmetrik, für eine Vielzahl von Stichproben einschließlich der Stichprobe, und Bestimmen, auf Grundlage der gemittelten Vielzahl von Wahrscheinlichkeitsmetriken, ob sich die Fahrzeugsystemkomponente verschlechtert hat, beinhalten. Auf diese Weise kann die Funktionsfähigkeit einer Fahrzeugsystemkomponente kontinuierlich ungeachtet spezifischer Diagnoseeingangsbedingungen überwacht werden.

Steuerungsvorrichtung für eine Verbrennungskraftmaschine

Eine durch die vorliegende Erfindung vorgesehene Steuerungsvorrichtung für eine Verbrennungskraftmaschine ist eine Steuerungsvorrichtung, welche die Präzision der Realisierung eines erforderlichen Drehmoments erhöhen kann, während ein Luft-Kraftstoff-Verhältnis verändert wird, um die Emissionsleistung aufrecht zu erhalten. Die vorliegende Steuerungsvorrichtung erzeugt ein Ziel-Luft-Kraftstoff-Verhältnis durch Verringern einer Veränderungsgeschwindigkeit eines erforderlichen Luft-Kraftstoff-Verhältnisses der Verbrennungskraftmaschine. Jedoch wird, wenn ein Verschlechterungs-Grad eines Katalysators, der in einem Abgas-Durchlass der Verbrennungskraftmaschine angeordnet ist, eine vorbestimmte Referenz oder größer ist, die Verringerung der Veränderungsgeschwindigkeit des erforderlichen Luft-Kraftstoff-Verhältnisses gestoppt oder ein Verringerungs-Grad der Veränderungsgeschwindigkeit des erforderlichen Luft-Kraftstoff-Verhältnisses wird gesenkt. Die Steuerungsvorrichtung berechnet eine Ziel-Luftmenge ...

Method of controlling operation of an exhaust gas treatment apparatus

COERCION OUTPUT LIMITING AND MONITORING APPARATUS FOR VEHICLE IN USE

The present invention relates to a coercion output limiting and monitoring apparatus for a vehicle in use, more specifically, which can minimize air pollution by reducing emission of a nitrogen oxide (NO_X), control engine output to be low in a control module, additionally and forcibly control engine torque, and check whether a shortage of a urea aqueous solution is supplemented and replaced, or an SCR device is normally operated by a driver. The coercion output limiting and monitoring apparatus for a vehicle in use comprises: a control module; a buzzer; a lamp; an engine control motor; and an interlocking relay. COPYRIGHT KIPO 2016 ...

CONTROL SYSTEM, WORK MACHINE, AND CONTROL METHOD

A control system includes: an engine; a first hydraulic pump and a second hydraulic pump driven by the engine; a switching device provided in a flow path that connects the first hydraulic pump to the second hydraulic pump, and configured to perform switching between a merged state in which the flow path is opened and a separated state in which the flow path is closed; a first hydraulic actuator to which hydraulic fluid discharged from the first hydraulic pump is supplied in the separated state; a second hydraulic actuator to which hydraulic fluid discharged from the second hydraulic pump is supplied in the separated state; a determining unit configured to determine whether output of the engine is limited; and a merging-separating control unit configured to control the switching device so as to perform switching to the merged state when the determining unit determines that output of the engine is limited.

METHOD FOR THE DIAGNOSIS OF AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE, AND OF THE DEVICES CONNECTED TO THE INTERNAL COMBUSTION ENGINE, AND SYSTEM FOR CARRYING OUT THE METHOD.

Methods and systems for diagnosing engine internal exhaust gas recirculation

Systems and methods for diagnosing operation of an internal exhaust gas recirculation system of an internal combustion engine are presented. The system and method may be applied to conventional or hybrid powertrains having a capability to rotate an engine via an electric machine. The internal exhaust gas recirculation system may be diagnosed based on output of a differential pressure sensor.

SYSTEM UND VERFAHREN ZUM BETREIBEN EINES MOTORS

Verfahren und Systeme zum Betreiben eines Motors, der ein externes Abgasrückführ(AGR)-System beinhaltet, sind präsentiert. Bei einem nicht einschränkenden Beispiel werden eine Ausgabe eines Differenzdrucksensors und eine Ausgabe eines Saugrohrdrucksensors als eine Grundlage zum Bestimmen, ob eine AGR-Systemstörung vorliegt oder nicht, während ein Motor bei anderen Zuständen als Leerlaufzuständen läuft, verwendet.

Verfahren und Vorrichtung zur Steigerung der Effizienz des Motorbetriebs eines Kraftfahrzeugs durch Erkennen von Temperaturveränderungen

Verfahren zur Steigerung der Effizienz des Motorbetriebs eines Kraftfahrzeugs (100) mit den folgenden Schritten:- kontinuierliche (s410, s420, s430) Bestimmung eines oder mehrerer der Parameter Abgastemperatur (Texh), Kühlmitteltemperatur (Tcool) und Schmiermitteltemperatur (Toil);- kontinuierliche Bestimmung (s440) einer Veränderung mindestens einer der Temperaturen (Texh; Tcool; Toil) als Basis zur Regelung der Wärmeentwicklung des Motors (s240); und- Regelung (s450) der Wärmeentwicklung zur Erzielung einer gewünschten Betriebsweise des Motors (240); gekennzeichnet durch den Schritt- kontinuierliche Bestimmung einer Veränderungsrate mindestens einer der Temperaturen (Texh; Tcool; Toil) als Basis für die Prognostizierung der Veränderung der Wärmeentwicklung.

VERFAHREN ZUM BETREIBEN EINER BRENNKRAFTMASCHINE

STEUERSYSTEM, ARBEITSMASCHINE UND STEUERVERFAHREN

Steuersystem weist auf: einen Motor; eine erste Hydraulikpumpe und eine zweite Hydraulikpumpe, die von dem Motor angetrieben werden; eine Umschaltvorrichtung, die in einem Strömungsweg vorgesehen ist, der die erste Hydraulikpumpe mit der zweiten Hydraulikpumpe verbindet, und die eingerichtet ist, um ein Umschalten zwischen einem zusammengeführten Zustand, in dem der Strömungsweg geöffnet ist, und einem getrennten Zustand, in dem der Strömungsweg geschlossen ist, durchzuführen; ein erstes hydraulisches Stellglied, dem von der ersten Hydraulikpumpe ausgestoßenes Hydraulikfluid in dem getrennten Zustand zugeführt wird; ein zweites hydraulisches Stellglied, dem von der zweiten Hydraulikpumpe ausgestoßenes Hydraulikfluid in dem getrennten Zustand zugeführt wird; eine Bestimmungseinheit, die eingerichtet ist, um zu bestimmen, ob die Ausgangsleistung des Motors begrenzt ist; und eine Zusammenführungs-/Trennungs-Steuereinheit, die eingerichtet ist, um die Umschaltvorrichtung zu steuern, um ein ...

Verfahren und System zum Beibehalten eines DFSO

Es werden Verfahren und Systeme zum Steuern einer DFSO-Dauer bereitgestellt. Bei einem Beispiel kann ein Verfahren ein Anpassen der DFSO-Dauer aufgrund einer Partikelfiltertemperaturänderung umfassen.

Enabling lean NO to be provided

Verfahren und Vorrichtung zur Betriebsartensteuerung einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Steuerung einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs, wobei die Brennkraftmaschine Komponenten umfasst, welche jeweils in einer Betriebsart betrieben werden, die von einem Betriebsartenkoordinator (100) festgelegt wird, und wobei insbesondere vorgesehen ist, dass der Betriebsartenkoordinator (100) die genannte Festlegung wenigstens einer Betriebsart auf der Grundlage von weiteren Betriebsaspekten der Komponenten (310, 320) trifft.

COERCION OUTPUT LIMITING AND MONITORING APPARATUS FOR IN-USE VEHICLE

The present invention relates to a coercion output limiting and monitoring apparatus for an in-use vehicle, more specifically, which can control an engine output to be low with multiple stages having one or more modes, control in-use vehicle idling or an engine not to be started, minimize atmosphere pollution by reducing emission of nitrogen oxide (NOx), and be applied to a mechanical, electronic, and automatic vehicle. COPYRIGHT KIPO 2016 ...

Verfahren und System zum Steuern eines Turboladers eines Fahrzeugs

Ein Verfahren zum Steuern eines Turboladers eines Fahrzeugs enthält Folgendes: Bestimmen eines Soll-Ladedrucks einer Ansaugluft einer Vielzahl von Turboladern gemäß einer oder mehreren Fahrbedingungen eines Fahrzeugs durch eine Steuerung und Bestimmen von Soll-Öffnungsverhältnissen einer Vielzahl von Wastegates, die jeweils in der Vielzahl von Turboladern vorgesehen sind, gemäß dem Soll-Ladedruck, Bestimmen durch die Steuerung, ob ein durch einen Öffnungsverhältnis-Sensor erfasstes Ist-Öffnungsverhältnis eines beliebigen Wastegates der Vielzahl von Wastegates um einen Bezugswert geringer als das Soll-Öffnungsverhältnis des assoziierten Wastegates ist, und Begrenzen einer maximalen Drehzahl des Turboladers, der das assoziierte Wastegate aufweist, durch die Steuerung, wenn bestimmt wird, dass das Ist-Öffnungsverhältnis des assoziierten Wastegates um den Bezugswert geringer als das Soll-Öffnungsverhältnis ist.

차량의 운전자 강제 유도 방법 및 장치

... 요소 탱크 내의 요소의 레벨과 실제 차량의 속도를 고려하여 운전자에게 요소를 주입하도록 유도하는 차량의 운전자 강제 유도 방법 및 장치가 개시된다. 상기 운전자 강제 유도 방법은 엔진이 시동되면, 요소 레벨 및 평균 요소 소비량에 따른 잔여 주행 거리를 계산하는 단계; 잔여 주행 거리가 임계 거리보다 작으면, 요소 레벨 및 평균 요소 소비량에 따른 잔여 주행 거리와, 요소 레벨 및 차속에 따른 잔여 주행 거리로부터 최종 잔여 주행 거리를 계산하는 단계; 그리고 최종 잔여 주행 거리에 따라 엔진의 출력을 제한하는 단계;를 포함할 수 있다.

Determination of the effective fuel-air ratio of a supercharged internal combustion engine with scavenging air component

A method for the fuel consumption reduction and/or power increase of an internal combustion engine of a motor vehicle is disclosed. A crank angle of a crankshaft is detected at which out of a cylinder the exhaust gases of a cylinder can be representatively measured on a lambda probe. The exhaust gas flow is measured on the lambda probe. A signal of the lambda probe is scanned at the time of the detection of the crank angle. A value indicated the detected angle and/or the scanned signal is sent to a computer. The value is corrected with the help of an exhaust gas pressure or exhaust gas back pressure model stored in the computer. An effective combustion lambda of the cylinder is calculated based on the sent values and a global lambda value stored in the computer and used to the control of the internal combustion engine.

COMBUSTION CONTROL METHOD IN VEHICLE ENGINE AND ENGINE SYSTEM FOR VEHICLE

A combustion control method during a rich spike engine operation includes the steps of: specifying an exhaust gas A/F based on a first output from a NOx sensor on an upstream side of a catalyst; specifying a NOx concentration in the exhaust gas on the upstream side of the catalyst based on a second output from the NOx sensor; and when the A/F is less than a reference range and the NOx concentration is not more than a reference value, calculating a value P1−P0 between a cylinder pressure P1 at EVO during the rich spike operation and that pressure P0 during a normal operation, when P1−P0 is larger than the reference range and P1>P0, a fuel injection timing at a post injection is retarded, when P1−P0 is smaller than the reference range and P1 Подробнее

Control system for compression ignition engine

A control system for a compression ignition engine includes a combustion chamber, a throttle valve, an injector, an ignition plug, an EGR system, a sensor device and a controller. The controller includes a first mode module, a second mode module and a changing module configured to change an engine mode from a first mode to a second mode in response to a change demand. The changing module outputs signals to the throttle valve and the injector in response to the demand so that an air-fuel ratio of mixture gas becomes a stoichiometric air-fuel ratio or a substantially stoichiometric air-fuel ratio, and outputs a signal to the EGR system so that an EGR gas amount decreases more than before the demand, and when the EGR gas amount is determined to be decreased to a given amount, the changing module permits that the second mode module starts the second mode.

DIESEL EXHAUST FLUID DOSER PROTECTION DURING COLD AMBIENT TEMPERATURE CONDITIONS USING CYLINDER CUTOUT METHODS

A system includes an exhaust aftertreatment system in exhaust gas receiving communication with an engine including a plurality of cylinders where the engine is structured to operate according to low load conditions and where a controller is structured to determine that at least one diesel emissions fluid (DEF) doser is frozen based on at least one of an ambient air temperature and a DEF source temperature. The controller is structured to operate the engine according to a skip-fire mode in response to a DEF flag indicating that the at least one DEF doser is frozen. The skip-fire mode comprises firing a portion of the plurality of cylinders that is less than a total amount of cylinders of the plurality of cylinders. The controller is structured to discontinue the skip-fire mode in response to determining that the at least one DEF doser is likely thawed.

Engine and aftertreatment optimization system

An approach and system for engine and aftertreatment system optimization. Emissions of an engine may be reduced by an aftertreatment mechanism. Control of the engine and the aftertreatment mechanism may be coordinated for the best overall efficiency relative to both fuel consumption and the emissions reduction. Engine and aftertreatment control may also be optimized in terms of cost function minimization. Individual efficiencies of the engine and aftertreatment mechanism are not necessarily significant by themselves. Therefore, the engine and aftertreatment mechanism should be controlled in a manner to achieve the optimality of the engine and the aftertreatment mechanism together as one entity.

Ammonia storage capacity of SCR catalyst unit

The present disclosure describes methods for evaluating ammonia storage capacity of a close-coupled SCR unit while remaining compliant with prescribed emissions limits, methods of controlling an emission aftertreatment system including multiple SCR units and emission management systems for a vehicle including an internal combustion engine and an emission aftertreatment system that includes two or more SCR units.

Method for operating internal combustion engine e.g. diesel engine for motor vehicle, involves partially removing hydrocarbons deposited at cleaning mode of after-treatment element from treatment element during preset temperature range

The method involves using an oxidation catalyst (16) and a particulate filter (18) as the treatment elements. The treatment elements are associated with a cleaning mode by a predeterminable period of time (32). The prevailing temperature (T) is set to the exhaust gas in a first temperature range. The temperature is lower than temperature of temperature range for regenerating the filter. The hydrocarbons deposited at the cleaning mode of the after-treatment element are removed partially from the after-treatment element, when the temperature range ranges from 520-570 Kelvin.

SYSTEME UND VERFAHREN FÜR EINE ABGASTEMPERATURSENSORDIAGNOSE MIT GETEILTEM LAMBDA-MOTORBETRIEB

Diese Offenbarung stellt Systeme und Verfahren für eine Abgastemperatursensordiagnose mit geteiltem Lambda-Motorbetrieb bereit. Es werden Verfahren und Systeme zum Identifizieren von Reaktionen auf einen beeinträchtigten Abgastemperatursensor (AGT-Sensor) bereitgestellt. In einem Beispiel kann das Verfahren Folgendes beinhalten: Takten eines Motors zwischen einem Betriebsmodus mit höherer Temperatur und einem Betriebsmodus mit niedrigerer Temperatur, während Motordrehmomentausgabe über den Betriebsmodus mit höherer Temperatur und den Betriebsmodus mit niedrigerer Temperatur beibehalten wird, wobei sowohl der Betriebsmodus mit höherer Temperatur als auch der Betriebsmodus mit niedrigerer Temperatur stöchiometrisches Abgas an einem Katalysator bereitstellen, und Charakterisieren eines Reaktionsverhaltens eines AGT-Sensors auf Grundlage einer Ausgabe des AGT-Sensors während des Taktens. Auf diese Weise werden schrittweise Änderungen der Abgastemperatur erzeugt, um die Reaktion des AGT-Sensors ...

CONTROL SYSTEM FOR COMPRESSION-IGNITION ENGINE AND METHOD OF DETERMINING IN-CYLINDER TEMPERATURE

A control system for a compression-ignition engine includes a combustion chamber, an injector, an ignition plug, a sensor device, and a controller having a circuitry. The ignition plug forcibly ignites mixture gas to start combustion accompanied by flame propagation of a part of the mixture gas, and again ignites remaining unburnt mixture gas at a timing at which the unburnt mixture gas combusts by self-ignition. The controller is configured to execute an ignition controlling module to output an ignition signal to the ignition plug before a target timing so that the unburnt mixture gas self-ignites at the target timing, an ignition timing estimating module to estimate an actual CI timing indicative of a timing at which the unburnt mixture gas actually self-ignited based on an in-cylinder pressure parameter, and an in-cylinder temperature determining module to determine the in-cylinder temperature at a given crank angle based on the estimated result.

METHOD OF CONTROLLING A VEHICLE ASSEMBLY

Controlling a vehicle assembly can include determining a first time series of an operating parameter of the vehicle assembly defining a first drive cycle, the first drive cycle for testing one or more performance parameters of the vehicle assembly; identifying a plurality of ranges of the operating parameter during the first drive cycle; determining probabilities of the vehicle assembly operating in and/or transitioning between the ranges of the operating parameter during the first drive cycle; determining one or more second time series of the operating parameter defining one or more second drive cycles, the one or more second time series having a different duration from the first time series, wherein the one or more second time series are determined based on the determined probabilities of the vehicle assembly operating in and/or transitioning between the ranges of the operating parameter during the first drive cycle; and controlling the vehicle assembly and/or a further vehicle assembly ...

Verfahren und Steuerungseinrichtung zum Betreiben einer Brennkraftmaschine

Verfahren zum Betreiben einer ein Abgasnachbehandlungssystem aufweisenden Brennkraftmaschine, deren Abgasnachbehandlungssystem einen Katalysator mit Kohlenwasserstoffoxidationsaktivität aufweist, zumindest die folgende Schritte umfassend: ein Sauerstoffgehalt und/oder ein Stickoxidgehalt im Abgas stromabwärts des Katalysators mit Kohlenwasserstoffoxidationsaktivität wird mit Hilfe mindestens eines Sensors messtechnisch bestimmt; ein Sauerstoffgehalt und/oder ein Stickoxidgehalt im Abgas stromaufwärts des Katalysators mit Kohlenwasserstoffoxidationsaktivität wird mit Hilfe mindestens eines Sensors messtechnisch oder alternativ rechnerisch bestimmt; eine Sauerstoffgehalt-Differenz zwischen dem Sauerstoffgehalt im Abgas stromaufwärts des Katalysators und dem Sauerstoffgehalt im Abgas stromabwärts des Katalysators und/oder eine Stickoxidgehalt-Differenz zwischen dem Stickoxidgehalt im Abgas stromaufwärts des Katalysators und dem Stickoxidgehalt im Abgas stromabwärts des Katalysators wird bestimmt ...

Engine control for catalyst regeneration

Methods and systems are provided for injecting water during an engine cylinder deactivation event so as to reduce an exhaust catalyst regeneration requirement following the cylinder deactivation. In one example, water is injected at one or more deactivated engine cylinders to reduce oxidation of the exhaust catalyst. Then, during engine cylinder reactivation, a degree of richness of a combustion air-to-fuel ratio may be reduced to decrease fuel penalty to the engine while reducing NOx emission.

METHOD TO CONTROL EXHAUST GAS RECIRCULATION SYSTEM OF VEHICLE

The present invention relates to a method to control an exhaust gas recirculation (EGR) system of a vehicle, determining whether or not a catalyst is broken, so as to control an opening degree of an EGR valve. According to one embodiment of the present invention, the method is a method to control the circulation amount of exhaust gas in a vehicle to which a catalyst and the EGR system are applied, and comprises: a first step of determining whether or not it is an EGR operation section in an ignition-on state; a second step of calculating a catalyst degradation index in a section determined as the EGR operation section in the first step by a catalyst degradation diagnosis logic and detecting misfire by a misfire detection logic of an engine; a third step of determining whether or not the catalyst degradation index calculated in the second step is equal to or higher than a first set value to determine abnormality of the catalyst degradation index, and determining whether or not the number ...

Control device for internal combustion engine

A control device is provided that generates a target air-fuel ratio by lessening a change speed of a required air-fuel ratio of an internal combustion engine. However, when a deterioration degree of a catalyst which is disposed in an exhaust passage of the internal combustion engine is a predetermined reference or more, lessening of the change speed of the required air-fuel ratio is stopped, or a lessening degree of the change speed of the required air-fuel ratio is decreased. The control device calculates a target air quantity for realizing the required torque under the target air-fuel ratio. For calculation of the target air quantity, data in which relationship of torque generated by the internal combustion engine and an air quantity taken into a cylinder is fixed by being related to an air-fuel ratio can be used.

METHOD OF TRANSIENT CONTROL FOR ROBUST ENRICHMENT OPERATION IN LOWTEMPERATURE COMBUSTION ENGINE

A method of transient control for enrichment operation in a low-temperature combustion engine. The method includes determining if a current mode of the low-temperature combustion (LTC) engine is a positive valve overlap (PVO) mode. Determining if a previous mode of the LTC engine was also the PVO mode when the current mode is the PVO mode, wherein the previous mode is immediately prior to the current mode. Determining if the previous mode of the LTC engine was a negative valve overlap (NVO) mode when the previous mode was not the PVO mode. Initiating a predetermined enrichment PVO mode for the LTC engine based on the previous mode of the LTC engine. The predetermined enrichment PVO mode includes initiating a deep enrichment PVO mode, when the previous mode of the LTC engine was the NVO mode, and initiating a shallow enrichment PVO mode, when the previous mode of the LTC engine was not the NVO mode.

CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

A controller executes a first suspending process or a second suspending process when a vehicle satisfies a predetermined first condition or a predetermined second condition. The controller executes an integration process that, during execution of the first suspending process or the second suspending process, obtains an integrated value of an intake air amount of the internal combustion engine from when the first suspending process or the second suspending process that is being executed was started. When the integrated value is greater than or equal to a threshold, the controller stops the first suspending process or the second suspending process that is being executed. When the amount of particular matter deposited in a filter is the same, a first threshold, which is the threshold for the first suspending process, is greater than a second threshold, which is the threshold for the second suspending process.

SYSTEME UND VERFAHREN FÜR BORDEIGENE ÜBERWACHUNG EINES PASSIVEN NOX-ADSORPTIONSKATALYSATORS

Die Offenbarung stellt Systeme und Verfahren für die bordeigene Überwachung eines passiven NOx-Adsorptionskatalysators bereit. Verfahren und Systeme zum Überwachen einer NOx-Speicherkapazität eines passiven NOx-Adsorptionskatalysators (PNA), der in einem Abgas-Nachbehandlungssystem eines Motors enthalten ist, werden bereitgestellt. In einem Beispiel kann ein Verfahren, nach einem Kaltstart des Motors und bevor eine Abgastemperatur eine obere Schwellentemperatur erreicht, Angeben einer Verschlechterung des PNA auf der Grundlage einer Menge von NOx, die stromabwärts des PNA während eines Kraftstoffabschaltzustands gemessen wird, und während die Abgastemperatur zwischen einer unteren Schwellentemperatur und der oberen Schwellentemperatur liegt, beinhalten. Auf diese Weise kann die Verschlechterung der NOx-Speicherkapazität auf der Grundlage einer Menge von NOx, die vom PNA abgegeben wird, und unabhängig von einem NOx-Speichermesswert abgeleitet werden.

METHOD AND DEVICE FOR FORCED INDUCEMENT OF DRIVER

Disclosed are a method and a device for forced inducement of a driver, capable of inducing a driver to inject urea in consideration of a urea level inside a urea tank and the speed of a vehicle. The method for forced inducement of a driver comprises: a step of calculating a remaining driving distance in accordance with the urea level and average urea consumption when an engine starts; a step of calculating the final remaining driving distance from the remaining driving distance in accordance with the urea level and the vehicle speed and the remaining driving distance in accordance with the urea level and the average urea consumption when the remaining driving distance is less than a threshold distance; and a step of limiting output of the engine in accordance with the final remaining driving distance. COPYRIGHT KIPO 2016 (AA) Start (B1,B2) No (C1,C2) Yes (DD) Return (S100) Starting an engine? (S110) Measuring a urea level (S120) Calculating a remaining driving distance in accordance with ...

Verbrennungsmotor mit einem Steuergerät zur Koordination zwischen Maßnahmen in einer Abgasanlage und einer Parametrisierung des Verbrennungsmotors

Die Erfindung betrifft einen Verbrennungsmotor mit einem Steuergerät zur Koordination zwischen Maßnahmen in einer Abgasanlage und einer Parametrisierung des Verbrennungsmotors und ein Verfahren.Der erfindungsgemäße Verbrennungsmotor (1) umfasst einen Verbrennungszylinder (2), eine Abgasanlage (3) und ein Steuergerät (4). Die Abgasanlage (3) umfasst zumindest einen Fahrzeugkatalysator (6). Das Steuergerät (4) ist eingerichtet und ausgebildet, die folgenden Schritte auszuführen:- Vergleich (S10) eines vorgegebenen Sollwerts mit zumindest einem Istwert und- Koordination (S20) zwischen Maßnahmen in der Abgasanlage (3) und einer Parametrisierung des Verbrennungsmotors (1).

Verfahren und System zur Motorsteuerung

Systeme und Verfahren zum Bestimmen eines Luft-Kraftstoff-Fehlers in einem Motor, der über Kraftstoffdirekt- und -saugrohreinspritzung mit Kraftstoff versorgt wird. Mit einzelnen Kraftstoffeinspritzsystemen verbundene Fehler werden auf der Grundlage von Trends in den Fehlerkorrekturkoeffizienten der einzelnen Kraftstoffeinspritzsysteme von einem gemeinsamen Fehler unterschieden. Anpassbare Kraftstoffmultiplizierer für jedes Einspritzsystem werden aktualisiert, um den gemeinsamen Fehler zu berücksichtigen.

Method and system for determining air-fuel imbalance

Methods and systems are provided to determine air-fuel imbalance of cylinders in a variable displacement engine. In one example, the method may include during a cylinder deactivation event, sequentially deactivating each cylinder of a cylinder group including two or more cylinders and estimating a lambda deviation for each cylinder following the sequential deactivation of each cylinder of the cylinder group; and learning an air error for each cylinder based on the estimated lambda deviation.

SYSTEM AND METHOD FOR PREDICTIVE ENGINE AND AFTERTREATMENT SYSTEM CONTROL

Systems and apparatuses include a controller structured to: receive information indicative of an operating condition of a vehicle subsystem, receive information indicative of an external static condition, and receive information indicative of an external dynamic condition. The system is further configured to predict a fuel cut event based on at least one of the operating condition of the vehicle subsystem, the external static condition, and the external dynamic condition. Responsive to predicting a fuel cut event, the controller is structured to modulate at least one of a torque or a speed of the engine based on the operating condition of the vehicle subsystem and at least one of the information indicative of the external static condition and the external dynamic condition.

EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

An emission control device for an internal combustion engine is configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine. The emission control device includes a controller. The controller is configured to calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an operation condition of the internal combustion engine. The controller is configured to stop calculating the particulate matter accumulation amount when the particulate matter trap function is not functioning.

AMMONIA STORAGE CAPACITY OF SCR CATALYST UNIT

The present disclosure describes methods for evaluating ammonia storage capacity of a close-coupled SCR unit while remaining compliant with prescribed emissions limits, methods of controlling an emission aftertreatment system including multiple SCR units and emission management systems for a vehicle including an internal combustion engine and an emission aftertreatment system that includes two or more SCR units. 1. A method of evaluating ammonia storage capacity of a selective catalytic reduction (SCR) unit in an emission aftertreatment system (EAS) , the method comprising:operating the EAS at steady state conditions;dosing diesel exhaust fluid, into exhaust gas from the internal combustion engine, upstream of a close-coupled SCR unit;flowing the exhaust gas, into which the diesel exhaust fluid has been dosed, through the close-coupled SCR unit;flowing the exhaust gas from the close-coupled SCR unit through a downstream SCR unit;controlling NOx emissions from the EAS using the downstream SCR unit;terminating the dosing of diesel exhaust fluid into the flowing exhaust gas upstream of the close-coupled SCR unit;depleting ammonia stored in the close-coupled SCR unit;restarting the dosing of diesel exhaust fluid into the flowing exhaust gas upstream of the close-coupled SCR unit;reloading the close-coupled SCR unit with ammonia;determining the close-coupled SCR unit has reached a maximum ammonia loading; andupon determining the close-coupled SCR unit has reached the threshold ammonia loading, determine (1) an amount of ammonia loaded in the close-coupled SCR unit after restarting dosing of diesel exhaust fluid into the flowing exhaust gas upstream of the close-coupled SCR unit, (2) an amount of ammonia used for NOx conversion in the close-coupled SCR unit after restarting dosing of diesel exhaust fluid into the flowing exhaust gas close-coupled of the close-coupled SCR unit and (3) an amount of ammonia oxidized in the SCR unit after restarting dosing of diesel exhaust ...

MULTIVARIABLE MOTORDREHMOMENT- UND EMISSIONSREGELUNG FÜR VERBRENNUNGSMOTOREN

Es werden Motordrehmoment- und Emissionssteuerungssysteme (ETEC-Systeme), Verfahren zur Verwendung derartiger Systeme und Kraftfahrzeuge mit Motoren, die ETEC verwenden, offenbart. Ein ETEC-System ist zum Betrieb einer Verbrennungsmotor (ICE)-Anordnung offenbart. Das System beinhaltet einen Motorsensor zum Überwachen des Motordrehmoments, einen Abgassensor zum Überwachen der Stickoxid (NOx)-Ausgabe der ICE-Anordnung und eine Motorsteuereinheit (ECU), die kommunikativ mit dem Motorsensor, dem Abgassensor und der ICE-Anordnung verbunden ist. Die Motorsteuereinheit ist konfiguriert, um: Soll-Motordrehmomentdaten und Soll-NOx-Ausstoßdaten zu empfangen; Aus dem aktuellen Motordrehmoment und den aktuellen NOx-Ausstoß, Soll-Motordrehmoment und Soll-NOx-Ausstoß eine Soll-Motorbetriebsreferenz und eine Soll-Abgasbetriebsreferenz zu bestimmen; Aus der Soll-Motorbetriebsreferenz und der Soll-Abgasbetriebsreferenz einen Motorbetriebssteuerbefehl und einen Abgasbetriebssteuerbefehl zu bestimmen; Und ...

Verfahren zur Diagnose einer Brennkraftmaschine eines Kraftfahrzeuges, sowie der mit der Brennkraftmaschine verbundenen Vorrichtungen, sowie ein System zur Durchführung des Verfahrens

Verfahren zur Diagnose einer Brennkraftmaschine eines Kraftfahrzeuges sowie der mit der Brennkraftmaschine verbundenen Vorrichtungen. Das Verfahren weist die folgenden Verfahrensschritte auf:- Analysieren mindestens eines Abgaswertes durch ein Abgasmessgerät,- Bestimmen mindestens eines OBD-Messwertes, welcher im Rahmen einer On-Bord-Diagnose durch ein fahrzeuginternes Steuergerät analysiert wird, durch ein OBD-Messgerät,- Übermitteln des mindestens einen Abgaswertes und/oder des mindestens einen OBD-Messwertes an eine Auswerteeinrichtung,- Ableiten einer Fehlfunktion, die die Brennkraftmaschine und/oder eine mit der Brennkraftmaschine verbundene Vorrichtung beeinflusst, aus dem mindestens einen Abgaswerte und dem mindestens OBD- Messwert durch die Auswerteeinrichtung.

For detecting urea deposit forming device and method

THREE-WAY CATALYTIC CONTROL METHOD AND THREE-WAY CATALYTIC CONTROL SYSTEM FOR REDUCING FUEL CONSUMPTION AND VEHICLE THEREOF

A three-way catalytic control method of the present invention is controlled by a controller (10) having an O2 purge map (20-1), wherein the controller (10) applies a set O2 purge time to which an oxygen storage capacity (OSC) oxygen setting initial value (A) is applied, when the O2 purge control performed by a three-way catalysis (20) is not an OSC oxygen increase condition of an OSC (20-1), and when determined to be the OSC oxygen increase condition, an OSC oxygen increase amount is applied to the OSC oxygen setting initial value (A) such that a calculated O2 purge time longer than the set O2 purge time is applied. When an increase amount of the calculated O2 oxygen purge time is greater than or equal to a degraded O2 purge time, the degraded O2 purge time which is based on an oxygen sensor is applied or an on-board diagnosis (OBD) O2 purge time is applied, and thus a new product with little improvement in NO_x reduction by oxygen removal can be applied with an O2 closed-loop control time ...

Catalyst overheat prevention apparatus

A catalyst overheat prevention apparatus has a temperature obtaining portion that estimates a convergence temperature of a catalyst provided in the exhaust system of an internal combustion engine and the present temperature of the catalyst. The catalyst overheat prevention apparatus also has a fuel increment calculation portion, a comparison portion, a correction portion, and a fuel increment setting portion, which are used to execute OT fuel increase control when the convergence temperature and present catalyst temperature obtained by the temperature obtaining portion are equal to or higher than an OT determination temperature. The catalyst overheat prevention apparatus also has a present temperature correction portion that corrects the present catalyst temperature to be equal to the OT determination temperature when the present catalyst temperature is equal to or higher than the OT determination temperature and the convergence temperature is equal to the OT determination temperature.

Exhaust purification system of internal combustion engine

An exhaust purification system of an internal combustion engine includes an NO X storage reduction catalyst device which is arranged in an engine exhaust passage. The NO storage reduction catalyst device stores SO X simultaneously with NO X . When the stored SO X amount exceeds a predetermined allowable amount, the SO X is made to be released by SO X release control which raises the temperature of the NO X catalyst device to the SO X releasable temperature, then makes the air-fuel ratio of the exhaust gas which flows into the NO X catalyst device the stoichiometric air-fuel ratio or rich. The NO X catalyst device has a residual SO X storage amount which finally remains even if performing SO X release control depending on the temperature of the NO X catalyst device when performing SO X release control. The system uses the residual SO X storage amount of the current SO X release control as the basis to calculate the SO X release speed at each timing in the current SO X release control.

Vehicle control device

A vehicle control device applied to a vehicle including an internal combustion engine and an electrically heated catalyst which is warmed by applying a current, and includes a catalyst carrier supporting a catalyst and a carrier retention unit that retains the catalyst carrier and has an electrical insulation property. The control unit performs a control of suppressing a supply of an unburned gas from the internal combustion engine to the electrically heated catalyst so that the carrier retention unit is maintained at a lower temperature than the catalyst, when a condition for performing a fuel cut of the internal combustion engine during a deceleration is satisfied. Therefore, it is possible to suppress a rapid cooling of the catalyst, and it becomes possible to maintain a temperature of the carrier retention unit at a lower temperature than a temperature of the catalyst.

Particulate filter ash loading prediction method and vehicle using same

A particulate filter ash loading prediction method including the steps of determining a maximum average time for the filter; performing a calculation of a running average of time between regenerations of the filter; calculating an end-of-service life ratio of the filter dependent upon the maximum average time and the running average. The method further includes the steps of determining a delta pressure adjustment factor to compensate for ash loading of the filter depending upon the end-of-service life ratio; and comparing the delta pressure adjustment factor to a predetermined maximum delta pressure value, and, if the delta pressure adjustment factor exceeds the predetermined maximum normalized delta pressure adjustment factor, then indicating that a service or replacement of the filter is needed due to the ash loading.

Particulate filter diagnostics

A system includes an internal combustion engine producing an exhaust stream, a particulate filtering device that treats the exhaust stream, a particulate sensor operatively coupled to the exhaust stream at a position downstream of the particulate filtering device, and a temperature sensor operatively coupled to the exhaust stream. The system includes a controller that interprets a particulate sensor particulate stability condition, interprets a particulate sensor input value and a particulate sensor temperature, compensates the particulate sensor input value in response to the particulate sensor temperature, and filters the compensated particulate sensor input value. The controller determines a soot accumulation value in response to the filtered compensated particulate sensor input value, interprets a diagnostic enable condition, and determines a particulate filter diagnostic value in response to the active diagnostic enable condition and the soot accumulation value. The controller provides the particulate filter diagnostic value to an output device.

Internal combustion engine with turbocharger

An internal combustion engine with a turbocharger that can favorably prevent an exhaust gas purifying catalyst from being clogged with a manganese oxide contained in an exhaust gas is provided. The internal combustion engine includes a turbocharger that includes a turbine disposed in an exhaust passage, the turbine being operative by exhaust energy of the internal combustion engine; an upstream catalyst, disposed in the exhaust passage at a downstream side of the turbine, for purifying an exhaust gas; an exhaust bypass passage for bypassing the turbine; and a waste gate valve for opening or closing the exhaust bypass passage. The waste gate valve is controlled to be in an open state during performance of a fuel cut of the internal combustion engine.

Air-fuel ratio control apparatus for an internal combustion engine

After rich control for controlling the air/fuel ratio of a mixture to be an air/fuel ratio richer than stoichiometric air/fuel ratio, lean control is carried out so that air/fuel ratio of the mixture formed in the combustion chamber is controlled to be an air/fuel ratio leaner by a predetermined degree than the stoichiometric air/fuel ratio, or the air/fuel ratio of the mixture is controlled to temporarily be the air/fuel ratio leaner by the predetermined degree than the stoichiometric air/fuel ratio. If lean control is carried out after rich control is finished, temporary lean control provides that a degree of how much the air/fuel ratio of the mixture is leaner than the stoichiometric air/fuel ratio when the air/fuel ratio of the mixture is controlled to be the air/fuel ratio leaner than the stoichiometric air/fuel ratio in lean control is lower than the predetermined degree according to the temperature of a catalyst.

Fuel control apparatus for internal combustion engine

A fuel control apparatus ( 100 ) for an internal combustion engine in a vehicle, the vehicle provided with: the internal combustion engine ( 200 ) provided with a fuel supply apparatus ( 208, 209 ) capable of supplying, as fuel, first fuel (liquid fuel) and second fuel (CNG) in which amount of a reducing agent in an exhaust air under an rich air-fuel ratio is greater than that in the first fuel; and an exhaust purification apparatus ( 300, 400 ) disposed in an exhaust passage of the internal combustion engine, the fuel control apparatus provided with: a first controlling device for controlling the fuel supply apparatus such that the supply of the fuel is temporarily stopped under a predetermined condition; and a second controlling device for controlling the fuel supply apparatus such that the second fuel is supplied as the fuel and such that an exhaust air-fuel ratio is the rich air-fuel ratio, if the supply of the fuel is restarted from a state in which the supply of the fuel is temporarily stopped.

Desulfurization method for lnt system

A desulfurization method of a nitrogen oxide absorption catalyst when diesel is used may include determining how many times a regeneration of a diesel particulate filter (DPF) is completed, ending a DPF regeneration, if the number of times of the DPF regeneration reaches a predetermined value and entering into a desulfurization mode to desulfurize the DPF, ending the desulfurization mode after the desulfurization mode is performed for a predetermined time, and calculating a particulate matters (PM) amount that is trapped in the DPF after the desulfurization, compensating the trapped PM amount, and determining a time of the DPF regeneration. A desulfurization timing is determined based on the number of times that the DPF is regenerated to be able to simplify the desulfurization logic and also reduce the memory of ECU, when the LNT catalyst is poisoned by a small amount of sulfur included in exhaust gas.

Method for Operating a Particle Filter

A method for operating a particle filter that filters particles contained in the exhaust of motor vehicle combustion engines. A conditioning step is performed such that the separation efficiency of the particle filter for particles is increased relative to the value existing in the new condition.

Cold start no2 generation system

A cold start NO 2 generation system includes a catalyst control module that identifies a portion of a three-way catalyst that corresponds to a nitrogen dioxide zone. A diagnostic module determines a temperature in the nitrogen dioxide zone, and a fuel control module adjusts an air/fuel ratio based on the temperature in the nitrogen dioxide zone. A cold start NO 2 generation method includes identifying a portion of a three-way catalyst that corresponds to a nitrogen dioxide zone. The method further includes determining a temperature in the nitrogen dioxide zone and adjusting an air/fuel ratio based on the temperature in the nitrogen dioxide zone.

Method for heating a catalytic converter in an engine system and for diagnosing the effectiveness of measures for heating the catalytic converter

A method for operating an internal combustion engine in a catalytic converter heating operation, the internal combustion engine being able to be operated in a normal operation, including the following steps: ascertaining a first exhaust gas temperature reading, which gives the exhaust gas temperature of the exhaust gas in a first catalytic converter, particularly in an oxidation catalytic converter; operating the internal combustion engine in a first operating mode, in which, in contrast to the normal operation, the exhaust gas, having an increased exhaust gas temperature, is exhausted from at least one cylinder of the internal combustion engine, as long as the first exhaust gas temperature reading has not reached a specified first temperature threshold value. This method enables a robust and simple diagnosis of the effectiveness of the catalytic converter heating operation according to the requirements of CARE Title 13 CCR Section 1968.2 Chapter.

Exhaust purification device of internal combustion engine

An ambient NO x adsorption catalyst that can adsorb NO x contained in an exhaust gas in the presence of CO under standard conditions is placed in an engine exhaust gas passage, in an internal combustion engine. Until an engine post-initiation catalyst is activated, the amounts of a high-boiling-point hydrocarbon and an unsaturated hydrocarbon that are contained in the exhaust gas flowing into the catalyst are reduced so that the NO x -adsorbing activity cannot be deteriorated by the adhesion activity of the hydrocarbons while maintaining the CO concentration in the exhaust gas flowing into the catalyst at a level higher than the concentration required for the adsorption of NO x .

Engine and aftertreatment optimization system

An approach and system for engine and aftertreatment system optimization. Emissions of an engine may be reduced by an aftertreatment mechanism. Control of the engine and the aftertreatment mechanism may be coordinated for the best overall efficiency relative to both fuel consumption and the emissions reduction. Engine and aftertreatment control may also be optimized in terms of cost function minimization. Individual efficiencies of the engine and aftertreatment mechanism are not necessarily significant by themselves. Therefore, the engine and aftertreatment mechanism should be controlled in a manner to achieve the optimality of the engine and the aftertreatment mechanism together as one entity.

Fuel injection amount control apparatus for an internal combustion engine

A fuel injection amount control apparatus includes an air-fuel ratio sensor which is disposed between an exhaust gas merging portion HK and an upstream catalyst. The control apparatus performs a feedback correction on an amount of fuel to be injected by the fuel injection valve in such a manner that an air-fuel ratio represented by an output value of an upstream air-fuel ratio sensor becomes equal to a target air-fuel ratio which is set at stoichiometric air-fuel ratio. The control apparatus obtains an air-fuel ratio imbalance indicating value, which becomes larger as a difference in air-fuel ratio of each of the mixtures supplied to each of the combustion chambers among the cylinders becomes larger, and performs an increasing correction to the amount of fuel to be injected by the injection valve in such a manner that an air-fuel ratio becomes a richer air-fuel ratio than the stoichiometric air-fuel ratio as the obtained air-fuel ratio imbalance indicating value becomes larger.

Exhaust system and method for controlling an exhaust system

In one exemplary embodiment of the invention, a method for controlling an exhaust system includes determining an air to fuel ratio within a combustion chamber of an internal combustion engine, measuring a temperature of an exhaust gas flow from the internal combustion engine into the exhaust system and determining a specific heat for the exhaust gas flow in a first segment of the exhaust system based on the temperature of the exhaust gas flow from the internal combustion engine and the air to fuel ratio, wherein the first segment is upstream of the particulate filter. The method also includes determining a first temperature of the exhaust gas in the first segment based on the specific heat for the exhaust gas flow and selectively controlling a regeneration process for the particulate filter using the determined temperature of the exhaust gas at the selected location.

Exhaust gas purification system

An exhaust gas purification system comprises an exhaust gas purification device which is arranged in an exhaust gas route of an engine, renewing devices, for burning and removing a particulate matter within the exhaust gas purification device, renewal advance notifying means which is actuated in the case that a clogged state of the exhaust gas purification device becomes equal to or more than a prescribed level, and renewal informing means which informs of a fact that the renewing devices are under operation. The renewal advance notifying means is actuated before actuating the renewing devices.

System and method for controlling an engine

A method for controlling regeneration within an after-treatment component of an engine comprises receiving an upstream temperature signal representing a temperature of an exhaust stream upstream from the after-treatment component and calculating an expected downstream temperature based on the upstream temperature signal and a model for calculating the expected downstream temperature. A temperature index is calculated based on the upstream temperature signal and the expected downstream temperature, and an estimate of accumulated particulate matter in the after-treatment component is calculated based, at least in part, on the temperature index. The estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component, and a remedial action is initiated when the estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold.

Air-fuel ratio control apparatus and air-fuel ratio control method for internal combustion engine mounted on hybrid vehicle

A hybrid vehicle executes intermittent operation for stopping an operation of an internal combustion engine and thereafter resuming the operation in response to an operating state. An air-fuel ratio control apparatus executes air-fuel ratio feedback control for bringing an air-fuel ratio of air-fuel mixture supplied to the engine on the basis of an output of an upstream air-fuel ratio sensor and an output of a downstream air-fuel ratio sensor into coincidence with a target air-fuel ratio. The air-fuel ratio control apparatus acquires a catalyst parameter that indicates a state of the catalyst at a start of the engine through intermittent operation. The air-fuel ratio control apparatus substantially corrects the target air-fuel ratio in response to the acquired catalyst parameter in a predetermined period after a start of the engine through intermittent operation, and learns a sub-feedback amount that is calculated using the output of the downstream air-fuel ratio sensor.

System and method for controlling exhaust regeneration

A system for controlling regeneration in an after-treatment component comprises a feedback module, an error module, a gain module, and a regeneration control module. The feedback module is configured for determining a rate of change of the value of a controlled parameter. The error module is in communication with the feedback module and is configured for determining a value of an error term by subtracting a value of a target parameter from the value of the controlled parameter. The gain module is configured for determining a value of a proportional gain factor by raising a mathematical constant “e” to the negative power of the value of a tuned gain exponent and for determining a value of a derivative gain factor by multiplying the value of the proportional gain factor by a tuning factor. The regeneration control module is configured for determining a value of a rational control increment.

Exhaust gas processing device for diesel engine

An exhaust gas processing device for a diesel engine includes a DPF, a PM deposition amount estimating unit for PM deposited in the DPF, a DPF regenerating unit, a DPF regeneration control unit, a storage unit, an acceleration regeneration request information notifying unit, an acceleration regeneration start operating unit, and a mode selecting unit. When a normal regeneration process is selected, the time at which acceleration regeneration request determination reserve period T 1 elapses from the start of the normal regeneration process without the end of the normal regeneration process is time T 2 for acceleration regeneration request determination, at which time, if the PM deposition amount estimation value is greater or equal to acceleration regeneration request determination value J 2 , it is determined that there is the acceleration regeneration request. The DPF regeneration control unit allows the acceleration regeneration request information notifying unit to start notification of the acceleration regeneration request information.

System and Method for Simplified Data Transfer

Systems and methods of performing a simplified data transfer are provided. For example, a simplified data transfer system may include two or more devices configured to perform a simplified data transfer. The first device may be configured to save and transfer data associated with applications open on the first device. When the second device initiates communication, the first device may automatically send the open application data to the second device.

Exhaust air injection

Embodiments for controlling exhaust air-fuel ratio are provided. In one example, an engine method comprises adjusting upstream exhaust air-fuel ratio to maintain a first emission control device at or below a threshold temperature, and when the upstream exhaust air-fuel ratio is below a threshold, injecting air into an exhaust passage between the first emission control device and a second emission control device to maintain downstream exhaust at a different, higher air-fuel ratio. In this way, excess emissions may be converted while maintain the emission control devices below a maximum temperature.

Diagnosis Method And Device For Operating An Internal Combustion Engine

A method is disclosed for performing an individual cylinder diagnosis with respect to pollutant emissions within a predefined operating range of an internal combustion engine, meeting at least one predefined condition. During the performing of the individual cylinder diagnosis, a forced activation, by means of which a predefined air/fuel ratio to be set is activated, is prescribed in a manner synchronous to the cylinder segment. The excitation is carried out such that each individual cylinder is subjected during subsequent working cycles to a mixture that is either richer or leaner in comparison to the predefined air/fuel ratio to be set due to the forced excitation. Depending on the forcibly activated air/fuel ratio to be set, the corresponding injection valves are actuated.

Control apparatus and control method for internal combustion engine

An engine ECU diagnoses the presence or absence of abnormality during execution of the fuel cut. The engine ECU is configured to restrict the fuel cut according to the temperature of a catalyst when the temperature is higher than a fuel-cut-restriction temperature of the catalyst. The engine ECU is configured to set the fuel-cut-restriction temperature is lower when the diagnosis has been completed than when the diagnosis has not been completed. Furthermore, the engine ECU continues the fuel cut if the diagnosis is completed during execution of the fuel cut while the temperature of the catalyst is between the fuel-cut-restriction temperature set prior to the completion of the diagnosis and the fuel-cut-restriction temperature set after the completion of the diagnosis.

Method for model-based determination of a temperature distribution of an exhaust gas post-treatment unit

In a method for a model-based determination of a temperature distribution of an exhaust gas post-treatment unit, a differentiation is made between steady operating states and non-steady operating states by taking into account the axial and the radial temperature distribution, and, on the basis of virtual segmentation of the post-treatment unit, in particular the radial heat transfer to the surroundings is taken into account in the model-based determination for steady operating states, and for non-steady operating states the heat transfer from the exhaust gas which flows axially through the post-treatment unit to the segments is taken into account by a heat transfer coefficient k.

Accumulated ash correction during soot mass estimation in a vehicle exhaust aftertreatment device

A method of correcting a soot mass estimate in a vehicle exhaust aftertreatment device includes monitoring an exhaust gas pressure drop across a particulate filter included with the vehicle exhaust aftertreatment device. Following the detection of a pressure drop, a controller may determine a soot mass estimate from the monitored pressure drop; determine an ash volume estimate representative of an amount of ash within the particulate filter; determine an ash correction factor from the soot mass estimate and the ash volume estimate; and calculate a corrected soot mass value by multiplying the ash correction factor with the soot mass estimate. If the corrected soot mass value exceeds a threshold, the controller may generate a corresponding particulate filter regeneration request.

Operating Method for a Motor Vehicle Diesel Engine Having an Exhaust Emission Control System

An operating method is provided for a motor vehicle diesel engine having an exhaust emission control system that includes a three-way catalytic converter and an SCR catalytic converter situated one behind the other in the flow direction of the exhaust gas. The diesel engine is operated, at least intermittently, with an air-fuel ratio of approximately λ=1.0 in a first operating range in which the SCR catalytic converter falls below a predefinable minimum temperature and with excess air that is typical for normal diesel engine operation in a second operating range in which the SCR catalytic converter exceeds the predefinable minimum temperature. An output signal of an exhaust gas sensor situated downstream from the three-way catalytic converter and which is correlated with a NOx concentration of the exhaust gas is used to set the air-fuel ratio in the first operating range.

Method and system for operating an engine turbocharger

A system and method for operating an engine turbocharger is described. In one example, the turbocharger is rotated in different directions in response to operating conditions. The system and method may reduce engine emissions.

METHOD AND SYSTEM FOR REGENERATING A GASOLINE PARTICULATE FILTER

Methods and systems are presented for regenerating a particulate filter. In one example, vehicle speed control mode parameters may be adjusted in response to an amount of soot stored in a particulate filter being greater than a first threshold. The vehicle speed control parameters may be returned to base values in response to the amount of soot stored in the particulate filter being less than a second threshold. 1. A vehicle system , comprising:a spark ignited, direct injection, engine;an exhaust system coupled to the spark ignited engine, the exhaust system including a particulate filter; anda controller, the controller including executable instructions stored in non-transitory memory to operate the spark ignited engine and adjust a vehicle speed range about a desired vehicle speed between which vehicle speed is maintained by a vehicle speed control the range adjusted in response to an amount of soot stored in the particulate filter greater than a threshold amount.2. The vehicle system of claim 1 , wherein the range is increased in response to the amount of soot stored in the particulate filter greater than the threshold amount.3. The vehicle system of claim 1 , wherein the range is increased even when the desired vehicle speed is maintained fixed.4. The vehicle system of claim 3 , further comprising additional instructions to claim 3 , after having been increased claim 3 , decrease the range in response to the amount of soot stored in the particulate filter below a lower threshold amount.5. The vehicle system of claim 4 , further comprising additional instructions to control an amount of air flowing through the spark ignited engine during a condition of deceleration fuel shutoff in response to the amount of soot stored in the particulate filter.6. The vehicle system of claim 1 , further comprising additional instructions to retard spark timing of the spark ignited engine in response to being within a threshold distance of an expected road condition where ...

Engine system

An engine system includes an intake pipe, an exhaust pipe, an exhaust gas recirculation (EGR) pipe, an injection amount deriver, and a fuel injector. The intake pipe is configured to direct intake air into a combustion chamber of an engine. The exhaust pipe is configured to receive exhaust gas discharged from the combustion chamber. The EGR pipe is coupled to the exhaust pipe and the intake pipe and configured to recirculate the exhaust gas into the intake pipe as EGR gas. The injection amount deriver is configured to derive a target injection amount of fuel using a mass of air contained in the EGR gas or a mass of fuel contained in the EGR gas and using a preset target air excess coefficient. The fuel injector is configured to inject an amount of fuel corresponding to the target injection amount derived by the injection amount deriver into the combustion chamber.

Engine device

An engine device includes an engine, an exhaust gas purification device arranged on an exhaust path of the engine, and an engine control device that controls drive of the engine. The engine control device executes a plurality of regeneration controls with which particulate matter accumulated in the exhaust gas purification device is combusted and removed. As the plurality of regeneration controls, at least non-work regeneration control, in which an exhaust gas temperature is raised in combination of post-injection and a predetermined high rotational speed, is included. The engine control device drives the engine so as to solely combust and remove the particulate matter in the non-work regeneration control and compulsorily executes isochronous control in which a rotational speed of the engine is maintained constant, irrespective of variation in load of the engine.

SYSTEM AND METHOD FOR PREDICTING VALIDITY OF NOx SENSOR OUTPUT

Methods and systems for operating an engine that includes a controller and a NOx sensor are described. In one example, output of the NOx sensor is selectively made available to software modules within the controller when an offset in NOx sensor output is not expected. If the offset in NOx sensor output is expected, the NOx sensor output may not be made available to the software modules.

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control device for an internal combustion engine is provided with a target air-fuel ratio setting part including a first setting control part performing normal control alternately switching a target air-fuel ratio between a predetermined first lean air-fuel ratio and a predetermined first rich air-fuel ratio and a second setting control part performing control for restoration of the storage amount stopping normal control and increasing the oxygen storage amount of a second catalyst when an output air-fuel ratio of a third air-fuel ratio sensor becomes a predetermined rich judgment air-fuel ratio or less. Further, the second setting control part is configured to set the target air-fuel ratio to a predetermined second lean air-fuel ratio larger than the first lean air-fuel ratio at the time of start of the control for restoration of the storage amount and set the target air-fuel ratio to a predetermined third lean air-fuel ratio smaller than the second lean air-fuel ratio after an exhaust with a larger air-fuel ratio than the stoichiometric air-fuel ratio flows out from the first catalyst in the time period of setting the target air-fuel ratio to the second lean air-fuel ratio. 1. A control device for an internal combustion engine for controlling an internal combustion engine provided with:an engine body;a first catalyst arranged in an exhaust passage of the engine body and having an oxygen storage ability;a second catalyst arranged in the exhaust passage at the further downstream side in the direction of flow of exhaust from the first catalyst and having an oxygen storage ability;a first air-fuel ratio sensor arranged in the exhaust passage at the further upstream side in the direction of flow of exhaust from the first catalyst for detecting an air-fuel ratio of the exhaust flowing into the first catalyst;a second air-fuel ratio sensor arranged in the exhaust passage between the first catalyst and the second catalyst for detecting an air-fuel ratio of the exhaust ...

Exhaust gas purification system of working machine

An exhaust gas purification system of a working machine is operable to reduce a loss of a working time caused by a point that it takes a long time to renew an exhaust gas purification device by throttle devices. The exhaust gas purification system of the working machine is provided with a common rail type engine which is mounted to the working machine, an exhaust gas purification device which is arranged in an exhaust system of the engine, and at least one of the intake air throttle device and the exhaust gas throttle device. It is provided with mode selection input means which selects whether an auxiliary renewing mode is executed or a forced renewing mode is executed in the case that a clogged state of the exhaust gas purification device is equal to or more than a prescribed level.

METHOD OF TWO-STEP VVL LIFT MALFUNCTION AVOIDANCE LEARNING CONTROL AND ELECTRIC TWO-STEP VVL SYSTEM THEREOF

A method of two-step variable valve lift (VVL) malfunction avoidance learning control may include: in a two-step VVL system which is operated with a main lift and a secondary lift, verifying, by an electronic control unit (ECU), an operation avoidance area based on locking of a lock pin of a cam follower ; performing VVL operation learning, in which a failure of occurrence of the second lift is determined on the basis of a locking failure of the cam follower due to an initially set value of the operation avoidance area; and reflecting the operation avoidance area to the two-step VVL system with a corrected set value which is obtained through the VVL operation learning. 1. A method of two-step variable valve lift (VVL) malfunction avoidance learning control , the method comprising:providing a two-step VVL system operated with a main lift and a secondary lift;verifying, by an electronic control unit (ECU), an operation avoidance area based on locking of a lock pin of a cam follower;performing VVL operation learning, in which a failure of occurrence of the second lift is determined based on a locking failure of the cam follower due to an initially set value of the operation avoidance area; andreflecting the operation avoidance area to the two-step VVL system with a corrected set value which is obtained through the VVL operation learning.2. The method of claim 1 , wherein the initially set value and the corrected set value are response times claim 1 , and each of the response times is an elapsed time from a VVL operation signal to the occurrence of the secondary lift.3. The method of claim 1 , wherein the operation avoidance area is represented by an operation avoidance area curve in which a cam angle is matched to an engine speed.4. The method of claim 1 , wherein: the reflecting operation avoidance area to the two-step VVL system is implemented by a system application control claim 1 , and a VVL operation learning execution control of determining a vehicle condition ...

Control device for internal combustion engine

A control device for the internal combustion engine is provided with a carbon dioxide concentration control part configured to cause a concentration of carbon dioxide in exhaust flowing into the filter to decrease when the temperature of the filter becomes a predetermined first temperature setting or more and less than a predetermined second temperature setting. The first temperature setting is made a temperature selected from a temperature band at which ash deposited on the filter can be made to be separate from the filter when the inside of the filter is in an atmosphere where the concentration of carbon dioxide is lower than when it is in an exhaust atmosphere. The second temperature setting is made a temperature set so as to prevent excessive temperature rise of the catalyst device.

METHOD FOR REGENERATING A PARTICLE FILTER FOR AN INTERNAL COMBUSTION ENGINE

A method and system for regenerating a gasoline particle filter of an internal combustion engine is provided in which a value (Q) for a quantity of soot collected inside of the gasoline particle filter and a value (T) for a temperature of the gasoline particle filter are determined. The internal combustion engine is operated in a lean mode when the value (Q) for the soot quantity is greater than a first threshold, and the value (T) for the temperature of the gasoline particle filter is greater than a threshold. 110-. (canceled)11. A method for regenerating a gasoline particle filter of an internal combustion engine , comprising:determining a value for a quantity of soot collected inside of the gasoline particle filter;determining a value for a temperature of the gasoline particle filter;operating the internal combustion engine in a lean mode when the value for the soot quantity is greater than a first threshold, and the value for the temperature of the gasoline particle filter is greater than a temperature threshold.12. The method according to claim 11 , further comprising heating the gasoline particle filter if the value for the temperature of the gasoline particle filter is less than the temperature threshold claim 11 , and the value for the soot quantity is greater than a second threshold claim 11 , wherein the second threshold is greater than the first threshold.13. The method according to claim 12 , wherein the determined value for the quantity of soot collected inside of the gasoline particle filter is estimated.14. The method according to claim 12 , wherein the step of heating the gasoline particle filter comprises the step of operating the ICE with a higher engine load.15. The method according to claim 11 , wherein the step of operating the internal combustion engine in a lean mode comprises increasing the quantity of oxygen supplied to the gasoline particle filter by increasing an air/fuel ratio of the air/fuel mixture supplied to the internal combustion ...

SYSTEM AND METHOD FOR ADAPTING COMBUSTION TO MITIGATE EXHAUST OVERTEMPERATURE

A system and method for monitoring the temperature in a vehicle after-treatment system is provided. The system includes one or more temperature sensors positioned in the vehicle after-treatment system and an electronic control unit (ECU) configured by programming instructions encoded in computer readable media to execute a method. The method includes monitoring the temperature presented by the one or more temperature sensors, executing a lower oxygen combustion strategy for a slower exothermic reaction when the temperature exceeds a first threshold level, and deactivating the lower oxygen combustion strategy when the temperature drops below a second threshold level. 1. A method in a vehicle , comprising:monitoring the temperature in a vehicle after-treatment system;executing a lower oxygen combustion strategy for a slower exothermic reaction when the temperature exceeds a first threshold level; anddeactivating the lower oxygen combustion strategy when the temperature drops below a second threshold level.2. The method of claim 1 , wherein the monitoring is performed by a vehicle electronic control unit (ECU).3. The method of claim 2 , wherein the executing is performed under the control of the ECU.4. The method of claim 3 , wherein the deactivating is performed under the control of the ECU.5. The method of claim 1 , wherein the lower oxygen combustion strategy comprises reducing oxygen content by reducing airflow into one or more combustion cylinders.6. The method of claim 5 , wherein the lower oxygen combustion strategy comprises reducing oxygen content by adding EGR gases into one or more combustion cylinders.7. The method of claim 1 , wherein the lower oxygen combustion strategy comprises delaying the main injection SOI (start of injection).8. The method of claim 1 , wherein the lower oxygen combustion strategy comprises reducing the air-to-fuel ratio and combustion efficiency in the combustion chamber by adding one or more after injections.9. The method of claim ...

METHOD FOR REGENERATING EXHAUST GAS FILTER FOR VEHICLE

A method for regenerating an exhaust gas filter for a vehicle includes the steps of confirming and monitoring the current remaining amount of soot based on information on the initial amount of soot and information on the removal amount of soot during the execution of the service regeneration control mode, comparing the current remaining amount of soot with a predetermined target remaining amount in the condition in which the time accumulated and counted after the execution of the service regeneration control mode does not reach a predetermined first allowable time, and maintaining the execution of the service regeneration control mode until the remaining amount of soot reaches the target remaining amount in the condition that the accumulated and counted time does not reach the first allowable time when the current remaining amount of soot exceeds the target remaining amount. 1. A method for regenerating an exhaust gas filter for a vehicle , the method comprising the steps of:confirming an initial amount of soot that is a current amount of soot in the filter when a regeneration execution command is inputted from the vehicle;executing a service regeneration control mode for regenerating the filter by oxidizing the soot in the filter, and calculating a removal amount of soot during the execution of the service regeneration control mode;confirming and monitoring a current remaining amount of soot based on information on the initial amount of soot and information on the calculated removal amount of soot during the execution of the service regeneration control mode;comparing the current remaining amount of soot with a predetermined target remaining amount in a condition in which a time accumulated and counted after the execution of the service regeneration control mode does not reach a predetermined first allowable time; andmaintaining the execution of the service regeneration control mode until the remaining amount of soot reaches the target remaining amount in 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 ...

SYSTEM FOR PROVIDING NOTIFICATION OF A VEHICLE EVENT

A system including a vehicle control unit configured to detect a vehicle event and a communication unit configured to transmit a notification from the vehicle control unit to a mobile device, the notification including both an identification of the vehicle event and instructions on how to enact a specific driving task to reverse a condition associated with the detected event. 1. A system comprising:a vehicle control unit configured to detect a vehicle event; anda communication unit configured to transmit a notification from the vehicle control unit to a mobile device, the notification including both an identification of the vehicle event and instructions on how to enact a specific driving task for a vehicle to reverse a condition associated with the detected event.2. The system of claim 1 , wherein the vehicle event is a blocked or full Diesel Particulate Filter.3. The system of claim 1 , wherein the communication unit is configured to transmit a further notification claim 1 , advising of the vehicle event claim 1 , to a service provider.4. The system of claim 1 , wherein the notification is transmitted by the communication unit by way of one or more communication methods including at least one of Bluetooth claim 1 , WIFI claim 1 , email claim 1 , text message claim 1 , dedicate software application claim 1 , or ANT+.5. The system of claim 1 , wherein the vehicle is configured to provide ongoing completion status of the specific driving task to identify when the vehicle event has been mitigated.6. The system of claim 5 , wherein the vehicle is configured to communicate the completion status to a driver either visually or audibly by an in vehicle display or speaker.7. The system of claim 1 , wherein the vehicle control unit is configured to determine when the vehicle event has been mitigated and responsively transmit a success or failure notification to the mobile device through the communication unit.8. The system of claim 7 , wherein transmission of a failure ...

Control device for internal combustion engine

An apparatus includes circuitry configured to: calculate a temperature of exhaust flowing into an exhaust after-treatment system as a first exhaust temperature, calculate a temperature of exhaust flowing out from the exhaust after-treatment system as a second exhaust temperature, calculate a rate of change over time of the first exhaust temperature and a rate of change over time of the second exhaust temperature, and judge if the exhaust after-treatment system is in a removed state removed from the exhaust passage based on a difference between the rate of change over time of the first exhaust temperature and the rate of change over time of the second exhaust temperature.

SYSTEMS AND METHODS FOR CONTROLLING CYLINDER DEACTIVATION OPERATION IN ELECTRIFIED POWERTRAINS

At least some embodiments of the present disclosure are directed to systems and methods for controlling a cylinder deactivation (CDA) operation for an electrified powertrain, the electrified powertrain comprising an engine and an additional power source, the engine having a plurality of cylinders. The method includes the step of: operating the electrified powertrain in a CDA mode and deactivating one or more selected cylinders of the plurality of cylinders; receiving measurement data indicative of operating conditions of the electrified powertrain; analyzing the measurement data to determine whether a predetermined operating condition is met; and adjusting the CDA operation by adjusting the duration of the CDA operation or changing a number of deactivated cylinders. 1. A method of controlling a cylinder deactivation (CDA) operation for an electrified powertrain , the electrified powertrain comprising an engine and an additional power source , the engine having a plurality of cylinders , the method comprising:operating, by a controller comprising one or more processors, the electrified powertrain in a CDA mode and deactivating one or more selected cylinders of the plurality of cylinders;receiving, by the controller, measurement data indicative of operating conditions of the electrified powertrain;analyzing, by the controller, the measurement data to determine whether a predetermined operating condition is met; and adjusting, by the controller, the CDA operation by adjusting the duration of the CDA operation,', 'wherein the duration of the CDA operation is adjusted based at least partially on an output of a cost function applied to emission data., 'in response to the predetermined operating condition not being met,'}2. The method of claim 1 , wherein the predetermined operating condition comprises at least one of a noise claim 1 , vibration and harshness (NVH) criterion claim 1 , an emission criterion claim 1 , a transient performance criterion claim 1 , and a ...

METHOD FOR OPERATING AN ENGINE

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

METHOD AND SYSTEM FOR GASOLINE PARTICULATE FILTER OPERATIONS

Methods and systems are provided for optimal operation of a gasoline particulate filter coupled to an engine exhaust system. Based on engine operating conditions, a target soot level on the GPF may be determined, and one or more engine operating parameters may be adjusted to maintain the actual GPF soot level at the target level. In one example, if the actual GPF soot level is lower than the target level, one or more of a fuel injection timing and a fuel rail pressure may be adjusted to increase soot generation, and if the actual GPF soot level is higher than the target level, the GPF may be regenerated until the actual soot level reaches the target level. 1. A method for an engine comprising:responsive to actual soot level at an exhaust particulate filter being lower than a target soot level, adjusting one or more of a fuel injection timing and a fuel injection pressure to increase soot output of the engine until the actual soot level is at the target soot level, the target soot level varied based on engine temperature and engine load.2. The method of claim 1 , wherein the target soot level is set to a first target soot level during engine start conditions when the engine temperature is below a threshold temperature and the engine speed is below a threshold speed claim 1 , the target soot level is set to a second target soot level during engine idling conditions when the engine temperature is above the threshold temperature and the engine speed is below the threshold speed claim 1 , and the target soot level is set to a third target soot level when the engine temperature is above the threshold temperature and the engine speed is above the threshold speed claim 1 , wherein the first claim 1 , second claim 1 , and third target soot level are distinct from each other.3. The method of claim 1 , wherein the first target soot level is based on a fuel injection schedule during the engine start conditions claim 1 , the second target soot level is based on the fuel ...

SYSTEMS AND METHODS FOR INTELLIGENT VEHICLE EVAPORATIVE EMISSIONS DIAGNOSTICS

Methods and systems are provided for cleaning a fuel vapor storage canister positioned in an evaporative emissions control system of a vehicle. In one example, a method comprises sealing a fuel system of the vehicle for descending an altitude change that is predicted in advance, and subsequent to the vehicle descending the altitude change, unsealing the fuel system to passively purge fuel vapors stored in the fuel vapor storage canister to a fuel tank of the vehicle. In this way, bleed through emissions from the fuel vapor storage canister may be reduced, and engine operation may be improved.

SYSTEMS AND METHODS FOR COMBINED ENGINE BRAKING AND LOST MOTION EXHAUST VALVE OPENING

A combined dedicated braking and EEVO lost motion valve actuation systems for internal combustion engines provide subsystems for braking events and EEVO events on one or more cylinders. Various control strategies may utilize braking and EEVO capabilities to module one or more engine parameters, including aftertreatment temperature and engine load. 1. In an internal combustion engine having at least one cylinder and at least one respective exhaust valve associated with the at least one cylinder , a system for controlling motion of the at least one exhaust valve , comprising:a main event motion source associated with each of the at least one cylinder for providing main event motion to the respective at least one exhaust valve;an early exhaust valve opening (EEVO) motion source associated with each of the at least one cylinder for providing EEVO motion to the associated at least one exhaust valve;a main event valve train associated with each of the at least one cylinder for conveying main event motion and EEVO motion to the associated at least one exhaust valve;an EEVO lost motion component in at least one of the main event valve trains and adapted to absorb EEVO motion from the EEVO motion source in a first operational mode and adapted to convey EEVO motion from the EEVO motion source in a second operational mode;a braking motion source, separate from the main event motion source, associated with each of the at least one cylinder for providing braking event motion to the associated at least one exhaust valve; anda braking event valve train, separate from the main event valve train, associated with each of the at least one cylinder for conveying braking motion from the braking motion source to the associated at least one exhaust valve.2. The system of claim 1 , wherein the EEVO lost motion component comprises a valve bridge and a piston slidably disposed in the valve bridge.3. The system of claim 1 , wherein the main event motion source and the EEVO motion source ...

FUEL SUPPLY CONTROL SYSTEM FOR V-TYPE TWO-CYLINDER GENERAL PURPOSE ENGINE

A fuel supply control system for a V-type two-cylinder general purpose engine according to the present disclosure, in a V-type two-cylinder general purpose engine including one fuel injection valve in a throttle body disposed upstream via an intake manifold connected to a cylinder head of each cylinder, changes an injection frequency or an operation timing of the fuel injection valve in accordance with an engine operation state detected by a detection unit. 1. A fuel supply control system for a V-type two-cylinder general purpose engine , comprising a fuel injection valve in a throttle body disposed upstream via an intake manifold connected to a cylinder head of each cylinder ,wherein, in the fuel supply control system, an injection frequency or an operation timing of the fuel injection valve is changed in accordance with an engine operation state detected by a detection unit.2. The fuel supply control system for a V-type two-cylinder general purpose engine according to claim 1 ,wherein the detection unit to detect the engine operation state includes an intake pressure sensor, an engine rotation sensor, an engine temperature sensor, and an oxygen sensor.3. The fuel supply control system for a V-type two-cylinder general purpose engine according to claim 1 ,wherein in a case where an injection frequency of the fuel injection valve is once or twice, and a shift criteria is shifted from once to twice, an OR condition is applied, andin a case where the injection frequency of the fuel injection valve is shifted from twice to once, an AND condition is applied.4. The fuel supply control system for a V-type two-cylinder general purpose engine according to claim 1 ,wherein in a case where an injection frequency of the fuel injection valve is twice, an injection is performed from an exhaust stroke to an intake stroke of each cylinder, andin a case where an injection frequency of the fuel injection valve is once, the injection starts in the middle of the intake stroke of each ...

METHOD OF TWO-STEP VVL OPERATION LEARNING CONTROL AND ELECTRIC TWO-STEP VVL SYSTEM THEREOF

A method of two-step variable valve lift (VVL) operation learning control for a vehicle may include: applying, by a lift controller, a VVL control to an electric two-step VVL system; determining, by the lift controller, whether the vehicle is running in an electric vehicle (EV) mode; and when the vehicle is running in the EV mode, performing, by the lift controller, a learning time securing control of allowing a VVL operation learning to be performed by engine operating for an operation avoidance area and an operation avoidance time which are applied to a secondary lift of an exhaust valve. 1. A method of two-step variable valve lift (VVL) operation learning control for a vehicle , the method comprising:applying, by a lift controller, a VVL control to an electric two-step VVL system;determining, by the lift controller, whether the vehicle is running in an electric vehicle (EV) mode; andwhen the vehicle is running in the EV mode, performing, by the lift controller, a learning time securing control of allowing VVL operation learning to be performed by engine operating for an operation avoidance area and an operation avoidance time which are applied to a secondary lift of an exhaust valve.2. The method of claim 1 , wherein the learning time securing control includes:an EV mode learning time securing control which is performed by the engine operating in a state in which an engine and a motor are separated from a clutch based on an engine cooling water temperature; anda hybrid EV (HEV) mode learning time securing control which is performed by the engine operating in a state in which the engine and the motor are separated from the clutch based on an engine overrun time.3. The method of claim 2 , wherein a cold starting is determined based on the engine cooling water temperature.4. The method of claim 2 , wherein the EV mode learning time securing control includes:determining, by the lift controller, the EV mode;temporarily determining, by the lift controller, the engine ...

SEPARATELY DETERMINING FIRING DENSITY AND PUMPING DENSITY DURING FIRING DENSITY TRANSITIONS FOR A LEAN-BURN INTERNAL COMBUSTION ENGINE

A skip fire engine controller and method of control is described wherein during transitions from a first firing density to a second firing density, a firing density and a pumping density are separately set so as to balance the conflicting demands of (a) torque control, (b) Noise, Vibration and Harshness (NVH), (c) air flow through the engine and (d) air-fuel ratio. 1. An engine controller in a vehicle for controlling a lean burn internal combustion engine , the controller configured to:determine a target firing density while operating the internal combustion engine at a first firing density, the target firing density suitable to meet a requested torque demand for the internal combustion engine;determine a firing density during the transition from the first firing density to the target firing density;determine a pumping density during the transition from the first firing density to the target firing density;operate the internal combustion engine during the transition by:selectively firing or not firing each firing opportunity in accordance with the determined firing density;for each firing opportunity which is not fired, selectively either (a) pumping or (b) not pumping air through the internal combustion engine in accordance with the determined pumping density.2. The engine controller of claim 1 , wherein the firing density and the pumping density through the transition are determined to meet the requested torque demand claim 1 , while balancing the demands of operation at an acceptable Noise claim 1 , Vibration and Harshness (NVH) level and minimizing exhaust emissions.3. The engine controller of claim 1 , further configured to separately adjust:the firing density to mitigate excessive NVH; andthe pumping density to mitigate excessive emissions caused by too much or too little air flow through the internal combustion engine.4. The engine controller of claim 1 , when the first firing density is greater than the target firing density claim 1 , further configured to: ...

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.

METHOD AND SYSTEM FOR AFTERTREATMENT CONTROL

A method for controlling an internal combustion engine system including a particulate filter includes receiving a desired output for an internal combustion engine and receiving sensor information including information indicative of a quantity of soot in the particulate filter. The method includes calculating a plurality of sets of engine performance values based on respective sets of candidate control points, each set of engine performance values including a soot change rate at which the quantity of soot changes over time and determining whether the soot change rate satisfies a soot change rate limit that requires an increase in the quantity of soot in the particulate filter. The method also includes controlling the internal combustion engine based on a set of candidate control points that satisfies the soot change rate limit. 1. A method for controlling an internal combustion engine system including a particulate filter , the method comprising:receiving a desired output for an internal combustion engine;receiving sensor information including information indicative of a quantity of soot in the particulate filter;calculating a plurality of sets of engine performance values based on respective sets of candidate control points, each set of engine performance values including a soot change rate at which the quantity of soot changes over time;determining whether the soot change rate satisfies a soot change rate limit that requires an increase in the quantity of soot in the particulate filter; andcontrolling the internal combustion engine based on a set of candidate control points that satisfies the soot change rate limit.2. The method according to claim 1 , wherein the soot change rate limit is set based on the quantity of soot indicated in the sensor information.3. The method according to claim 2 , wherein the soot change rate limit is provided as a range of soot change rates including a minimum required soot change rate and a maximum allowed soot change rate.4. The ...

Method And Apparatus For Operating A Combustion Machine

The disclosure relates to internal combustion engines in general, and teaches various methods and apparatus for operating engines with an exhaust-gas turbocharger. Some embodiments include a method for operating an internal combustion engine having a fresh-gas tract for the supply of fresh gas to a cylinder, and an exhaust tract for the discharge of exhaust gas. They may include determining a value of a first operating condition of a catalytic converter arranged in the exhaust tract; determining a value of a second operating condition of the catalytic converter; calculating, as a function of the determined value, a first value for a maximum admissible scavenged-over quantity of fresh gas into the exhaust tract during scavenging operation; and setting the maximum admissible scavenged-over quantity to a second value lower than the first value if the value of the second operating condition reaches a predefined value. 1. A method for operating an internal combustion engine having a fresh-gas tract for the supply of fresh gas to a cylinder , and an exhaust tract for the discharge of exhaust gas , the method comprising:determining a value of a first operating condition of a catalytic converter arranged in the exhaust tract;determining a value of a second operating condition of the catalytic converter;calculating, as a function of the determined value, a first value for a maximum admissible scavenged-over quantity of fresh gas into the exhaust tract during scavenging operation; andsetting the maximum admissible scavenged-over quantity to a second value lower than the first value if the value of the second operating condition reaches a predefined value.2. The method as claimed in claim 1 , wherein determining the value of the first operating condition of the catalytic converter comprises modeling the value of the first operating condition.3. The method as claimed in claim 1 , wherein the first operating condition of the catalytic converter comprises a temperature gradient ...

Method and system of maintaining dpf regeneration for improving durability of dpf filter

A method of maintaining diesel particulate filter (DPF) regeneration for improving durability of a DPF, may include determining, by a controller, whether a vehicle enters an idle state during the DPF regeneration, controlling, by the controller, a concentration of oxygen introduced into the DPF to be equal to or less than a first reference value when the vehicle enters the idle state, and performing, by the controller, a regeneration process until a soot mass in the DPF may be equal to or less than a target reference value.

METHODS AND SYSTEM FOR OPERATING AN ENGINE

Systems and methods for increasing engine vacuum production and catalyst heating of a hybrid powertrain are described. In one example, a motor/generator rotates an engine at idle speed while the engine combusts air and fuel without providing torque sufficient to rotate the engine so that spark timing may be advanced or retarded from minimum spark timing for best torque to heat a catalyst and generate vacuum for vacuum consumers. 1. An engine operating method , comprising:combusting air and fuel within cylinders of an engine at an idle speed while providing engine torque insufficient to rotate the engine at the idle speed; androtating the engine at the idle speed via torque produced by a motor while providing engine torque insufficient to rotate the engine at the idle speed in response to a request to heat a catalyst.2. The method of claim 1 , further comprising adjusting an amount of air entering the engine responsive to a desired rate of catalyst heating.3. The method of claim 2 , further comprising retarding spark timing to provide the engine torque less than is needed to rotate the engine at the idle speed.4. The method of claim 1 , where the motor is a belt integrated starter/generator.5. The method of claim 1 , where the motor is a driveline integrated starter/generator.6. The method of claim 1 , where the idle speed is based on engine temperature.7. The method of claim 1 , further comprising running up speed of the engine from zero speed to the idle speed via the motor while combusting air and fuel within the cylinders of the engine and providing engine torque less than is needed to run-up engine speed to the idle speed.8. An engine operating method claim 1 , comprising:supplying spark to cylinders of an engine at a timing advanced or retarded from minimum spark for best torque spark timing in response to a request for vacuum and a request for catalyst heating, the timing weighted based on a difference in desired vacuum and actual vacuum;combusting air and ...

Particulate Filter Control System And Method

A system and method for controlling the operation of a particulate filter is disclosed. The objective of this control system is to manipulate the properties and spatial distribution of contaminant material accumulated in filters to reduce filter pressure drop and associated deleterious impacts of the contaminant material on filter performance.

CONTROL SYSTEM FOR ENGINE

A control system for an engine is provided, which includes an engine body formed with a cylinder, a NOcatalyst, an oxidation catalyst, a PM filter, a fuel injector configured to perform a main injection and a post injection, and a controller configured to execute a DeNOcontrol in which the fuel injector is controlled to perform the main and post injections so that an air-fuel ratio of exhaust gas is brought close to the stoichiometric air-fuel ratio or becomes rich and fuel supplied into the cylinder by the post injection combusts therein, and a filter regenerating control in which the fuel injector is controlled to perform the main and post injections so that the air-fuel ratio becomes lean and the fuel supplied into the cylinder by the post injection causes no combustion therein, the controller executing the DeNOcontrol and the filter regenerating control consecutively in this order. 1. A control system for an engine , comprising:an engine body formed with a cylinder;{'sub': x', 'x', 'x, 'a NOcatalyst provided in an exhaust passage through which exhaust gas discharged from the engine body flows, and configured to store NOwithin the exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reduce and release the stored NOwhen the air-fuel ratio of the exhaust gas is close to a stoichiometric air-fuel ratio or rich;'}{'sub': x', 'x, 'an oxidation catalyst provided integrally with the NOcatalyst or in the exhaust passage upstream of the NOcatalyst and configured to oxidize unburned fuel within the exhaust gas;'}a particulate matter (PM) filter provided in the exhaust passage downstream of the oxidation catalyst and configured to capture particulate matter within the exhaust gas;a fuel injector configured to perform a main injection in which fuel is injected into the cylinder to obtain an engine torque and a post injection in which fuel is injected into the cylinder at a timing later than the main injection; and [{'sub': 'x', 'a DeNOcontrol in which the fuel ...

CATALYST DIAGNOSIS DEVICE

The present invention provides a catalyst diagnosis device that enables precisely grasping a variation of AFR and diagnosing a deteriorated condition of the catalyst based on the variation. A timer counts elapsed time Tosc until downstream AFU (AFRd) meets a predetermined threshold condition when the fuel injection quantity is corrected by increasing or decreasing it so that as to the AFRu, the transition from either of leanness or richness to the other is repeated with the stoichiometric area between the leanness and the richness. An OSA calculating section calculates an Oxygen Storage Amount (OSA) as a function of the ΔAFR, Mfuel, Ne and Tosa. An OPA calculating section calculates an Oxygen Purge Amount (OPA) as a function of the ΔAFR, Mfuel, Ne and Topa. A deterioration diagnosing section diagnoses a deteriorated condition of the catalyst C on the basis of at least one of the OSA and OPA. 1. A catalyst diagnosis device which is provided with each Air/fuel ratio (AFR) sensor on an upstream side and on a downstream side of a catalyst provided in an exhaust passage of an engine and which determines deterioration of the catalyst on the basis of output of each AFR sensor , the catalyst diagnosis device comprising:a fuel injection quantity controller which controls a fuel injection quantity in order to turn AFR detected on the upstream side of the catalyst from either of leanness or richness to the other across reference AFR set in a stoichiometric area between the leanness and the richness;a timer which counts elapsed time since the AFR on the upstream side is turned from the either to the other until AFR detected by the AFR sensor on the downstream side meets a predetermined threshold condition;an Oxygen Storage Amount (OSA) calculating section which calculates oxygen storage capacity (OSC) of the catalyst on the basis of the elapsed time; anda deterioration diagnosing section which diagnoses a deterioration of the catalyst on the basis of the oxygen storage capacity ...

Method for Operating an Internal Combustion Engine

The invention relates to a method for operating an internal combustion engine ( 1 ), in particular having compression ignition, comprising at least one SCR catalytic converter ( 5 ) in the exhaust gas system ( 3 ) and an exhaust gas recirculation valve ( 8 ), wherein the exhaust gas recirculation amount and/or the position of the exhaust gas recirculation valve ( 8 ) is controlled in accordance with the NOx concentration upstream of the SCR catalytic converter ( 5 ) in such a way that a NOx concentration (NOx I1 ) measured by at least one first NOx sensor ( 6 ) upstream of the SCR catalytic converter ( 5 ) corresponds to a specified NOx concentration target value (NOx s ). In order to be able to adhere to legally required NOx emission limits with little complexity regardless of signs of aging, the NOx concentration in the exhaust gas is also measured downstream of the SCR catalytic converter ( 5 ) by means of at least one second NOx sensor ( 7 ) and is compared with the NOx concentration (NOx I1 ) of the first NOx sensor ( 6 ) upstream of the SCR catalytic converter ( 5 ) and an efficiency value (K nox ) of the SCR catalytic converter ( 5 ) for the NOx conversion is determined from a comparison of the measured NOx values (NOx I1 , NOx I2 ), wherein the NOx concentration target value (NOx,) upstream of the SCR catalytic converter ( 5 ) is modified if the determined efficiency value (K nox ) deviates from a specified target efficiency value (K noxs ).

EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE

A three-way catalyst, an NSR catalyst, and an SCR catalyst are provided in this order for an exhaust gas passage, wherein the air-fuel ratio (AFR) is set to a first AFR which is a rich AFR before the AFR is switched from a theoretical AFR to a lean AFR, and then the AFR is set to a second AFR which is higher than the first AFR and lower than the theoretical AFR if a NOx occlusion amount is less than a threshold value during a period until an NHadsorption amount of the SCR catalyst becomes a predetermined adsorption amount, while the AFR is set to a third AFR which is higher than the first AFR and lower than the second AFR if the NOx occlusion amount is not less than the threshold value. 1. An exhaust gas purification apparatus for an internal combustion engine , comprising:{'sub': '3', 'a three-way catalyst which is provided for an exhaust gas passage of the internal combustion engine, which has an ability to store oxygen, and which produces NHwhen an air-fuel ratio of an exhaust gas is lower than a theoretical air-fuel ratio;'}a storage reduction NOx catalyst which is provided for the exhaust gas passage downstream from the three-way catalyst, which has an ability to store oxygen, which is a catalyst to occlude NOx when the air-fuel ratio of the exhaust gas is a lean air-fuel ratio, and which reduces NOx occluded by the catalyst when the air-fuel ratio of the exhaust gas is not more than the theoretical air-fuel ratio;{'sub': '3', 'a selective catalytic reduction NOx catalyst which is provided for the exhaust gas passage downstream from the storage reduction NOx catalyst and which reduces NOx by using NHas a reducing agent; and'}a controller comprising at least one processor configured to adjust the air-fuel ratio in the internal combustion engine, wherein: estimate a NOx occlusion amount of the storage reduction NOx catalyst;', {'sub': '3', 'estimate an NHadsorption amount of the selective catalytic reduction NOx catalyst; and'}, {'sub': 3', '.', '3', '3', '3, ' ...

CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

An internal combustion engine includes an upstream side exhaust purification catalyst and a downstream side exhaust purification catalyst. The control device includes a storage amount estimating device which estimates the oxygen storage amount of the downstream side exhaust purification catalyst, and can execute fuel cut control which cuts the feed of fuel to the combustion chamber during operation of the internal combustion engine when the engine speed is the lowest reference speed or more. The control device lowers the lowest reference speed when the storage amount estimated by the storage amount estimating device has become a given limit storage amount or less, compared with when it is larger than the limit storage amount. As a result, a control device can effectively keep the oxygen storage amount of the downstream side exhaust purification catalyst from decreasing to zero. 1. A control device of an internal combustion engine , the engine comprising an upstream side exhaust purification catalyst which is provided in an exhaust passage of an internal combustion engine and a downstream side exhaust purification catalyst which is provided in said exhaust passage at the downstream side in the direction of exhaust flow of said upstream side exhaust purification catalyst ,the control device comprising a storage amount estimating means for estimating the oxygen storage amount of said downstream side exhaust purification catalyst,when conditions for execution of a fuel cut, including the engine speed being a lowest reference speed or more, stand, fuel cut control which cuts the feed of fuel to the combustion chamber during operation of the internal combustion engine can be executed, andwhen a storage amount estimated by said storage amount estimating means becomes a given limit storage amount or less, said lowest reference speed of said fuel cut execution conditions is lowered compared to when it is greater than said limit storage amount.2. The control device of an ...

EXHAUST EMISSION CONTROL SYSTEM OF ENGINE

An exhaust emission control system of an engine including a NOcatalyst disposed in an exhaust passage and for storing NOwithin exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the stored NOwhen the air-fuel ratio is approximately stoichiometric or rich, is provided. The system includes a SCR catalyst disposed downstream of the NOcatalyst and for purifying NOby causing a reaction with ammonia, and a processor configured to execute a NOreduction controlling module for controlling the air-fuel ratio to a target ratio so that the stored NOis reduced. The controlling module limits the performance of the NOreduction control when a temperature of the SCR catalyst is above a given temperature and loosens the limitation in a given engine operating state in which an exhaust gas flow rate is above a given rate despite the SCR catalyst temperature. 1. An exhaust emission control system of an engine , including a NOcatalyst disposed in an exhaust passage of the engine and for storing NOwithin exhaust gas when an air-fuel ratio of the exhaust gas is lean , and reducing the stored NOwhen the air-fuel ratio is approximately stoichiometric or rich , the system comprising:{'sub': x', 'x, 'a SCR catalyst disposed in the exhaust passage downstream of the NOcatalyst and for purifying NOwithin exhaust gas by causing a reaction with ammonia; and'}{'sub': x', 'x', 'x', 'x', 'x', 'x', 'x, 'a processor configured to execute a NOreduction controlling module for performing a NOreduction control in which the air-fuel ratio is controlled to a target air-fuel ratio so that the stored NOis reduced, the target air-fuel ratio being a ratio at which the stored NOis reducible, wherein the NOreduction controlling module limits the performance of the NOreduction control when temperature of the SCR catalyst is above a given temperature, the limitation of the performance of the NOreduction control being loosened in a given operating state of the engine in which a flow rate of ...

EXHAUST EMISSION CONTROL SYSTEM OF ENGINE

An exhaust emission control system of an engine, including an NOcatalyst disposed in an exhaust passage for storing NOwithin exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the stored NOwhen the air-fuel ratio is approximately stoichiometric or rich, is provided. The system includes an SCR catalyst disposed in the exhaust passage downstream of the NOcatalyst and for purifying NOwithin exhaust gas by causing a reaction with ammonia, a controller executing a NOreduction controlling module for executing a control in which the air-fuel ratio is controlled to a target air-fuel ratio so that the stored NOis reduced, and an ammonia adsorption amount acquiring module for acquiring an ammonia adsorption amount of the SCR catalyst by detection or estimation. The NOreduction controlling module controls the target air-fuel ratio to be leaner as the ammonia adsorption amount increases. 1. An exhaust emission control system of an engine , including an NOcatalyst disposed in an exhaust passage of the engine for storing NOwithin exhaust gas when an air-fuel ratio of the exhaust gas is lean , and reducing the stored NOwhen the air-fuel ratio is approximately stoichiometric or rich , the system comprising:{'sub': x', 'x, 'an SCR catalyst disposed in the exhaust passage downstream of the NOcatalyst and configured to purify NOwithin exhaust gas by causing a reaction with ammonia; and'}a controller, wherein{'sub': x', 'x', 'x', 'x, 'the controller is configured to execute an NOreduction controlling module for executing an NOreduction control in which the air-fuel ratio is controlled to a target air-fuel ratio so that the stored NOis reduced, the target air-fuel ratio being a ratio at which the stored NOis reducible; and'}{'sub': x', 'x', 'x', 'x', 'x', 'x, 'the NOreduction controlling module sets a first air-fuel ratio that is rich as the target air-fuel ratio until a predetermined time period passes from start of the NOreduction control, and sets a second ...

SYSTEM INCLUDING ENGINE AND METHOD OF OPERATING ENGINE

A system includes an engine adapted to output a torque, a parasitic load adapted to receive a portion of the torque from the engine, and a controller communicably coupled to the parasitic load. The controller is configured to determine an actual exhaust temperature value of an exhaust gas flow exiting the engine and a minimum fuel amount to be injected into the engine. The controller is configured to compare the actual exhaust temperature value with an exhaust temperature threshold value of the exhaust gas flow to determine a first difference between the actual exhaust temperature value and the exhaust temperature threshold value. The controller is configured to determine a target torque output of the engine based on the first difference and the minimum fuel amount. The controller is configured to cause the torque to be increased to attain the target torque output using the parasitic load. 1. A system comprising:an engine adapted to output a torque;a parasitic load adapted to receive a portion of the torque from the engine; and{'claim-text': ['determine an actual exhaust temperature value of an exhaust gas flow exiting the engine and a minimum fuel amount to be injected into the engine;', 'compare the actual exhaust temperature value with an exhaust temperature threshold value of the exhaust gas flow to determine a first difference between the actual exhaust temperature value and the exhaust temperature threshold value;', 'determine a target torque output of the engine based on the first difference and the minimum fuel amount to be injected into the engine; and', 'cause the torque of the engine to be increased to attain the target torque output using the parasitic load.'], '#text': 'a controller communicably coupled to the parasitic load, wherein the controller is configured to:'}2. The system of claim 1 , wherein the controller is further configured to determine a first torque output value based on the first difference.3. The system of claim 2 , wherein the ...

Catalyst abnormality diagnostic device and catalyst abnormality diagnostic method

A catalyst abnormality diagnostic device is configured to diagnose an abnormality of a first purification catalyst having an oxygen storage capacity and a second purification catalyst having the oxygen storage capacity and a function of a particulate filter provided on an exhaust passage on a downstream side of the first purification catalyst. The catalyst abnormality diagnostic device adjusts a fuel injection amount so that an air-fuel ratio of an exhaust gas is repeatedly in a rich state and a lean state, obtains a first determination value indicating a catalytic performance of the first purification catalyst, obtains a second determination value indicating a catalytic performance of the second purification catalyst, and determines whether there is an abnormality in one or both of the first purification catalyst and the second purification catalyst on the basis of the first determination value, the second determination value, and a predetermined determination reference value.

REGENERATION OF GASOLINE PARTICULATE FILTERS

A internal combustion engine system includes a gasoline internal combustion engine having a set of donor cylinders and a set of non-donor cylinders. The donor cylinders provide a proportion of the exhaust gas to an exhaust gas recirculation system and the remainder of the exhaust gas to an exhaust gas aftertreatment system including a particulate filter. The non-donor cylinders also provide exhaust gas to exhaust gas aftertreatment system. An engine controller can determine whether the particulate filter needs regeneration, and in response, retard a spark timing of the non-donor cylinders by an amount that is different from an amount or retardation of the donor cylinders. 1. A method for regeneration of a particulate filter downstream an internal combustion engine having plurality of cylinders , comprising:operating at least one donor cylinder and at least one non-donor cylinder of the internal combustion engine at a spark timing, the particulate filter receiving exhaust gas from the at least one non-donor cylinder and the at least one donor cylinder, wherein a proportion of exhaust gas generated by the at least one donor cylinder is provided to an exhaust gas recirculation system;determining a need for regeneration of the particulate filter based on at least a first input; andresponsive to determining the need for regeneration, retarding the spark timing of the at least one non-donor cylinder by a first amount of retardation and retarding the spark timing of the at least one donor cylinder by a second amount of retardation, the first amount being unequal to the second amount.2. The method of claim 1 , wherein retarding the spark timing of the at least one non-donor cylinder by a first amount of retardation and retarding the spark timing of the at least one donor cylinder by a second amount of retardation comprises setting the first amount of retardation to be greater than the second amount of retardation.3. The method of claim 1 , wherein retarding the spark timing ...

LEAN BURN INTERNAL COMBUSTION ENGINE EXHAUST GAS TEMPERATURE CONTROL

A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range. 1. A method of operating a lean burn internal combustion engine having one or more working chambers , the method comprising:selectively firing or skipping one or more working cycles of the one or more working chambers, wherein one of the one or more working chambers may be fired during one engine cycle and then skipped during the next engine cycle and selectively skipped or fired during the next engine cycle; andinjecting fuel during at least some of the skipped working cycles such that at least some of the injected fuel is introduced into an exhaust stream fluidly coupled to the one or more working chambers.2. The method as recited in claim 1 , further comprising claim 1 , injecting the fuel late in a power stroke of the skipped working cycle so that little or no combustion occurs resulting in uncombusted fuel in the exhaust stream.3. The method as recited in claim 1 , further comprising claim 1 , for a given skipped working cycle claim 1 , operating the corresponding working chamber by:opening an intake valve associated with the working chamber and inducting air into the working chamber during an intake stroke;closing the intake valve and an exhaust valve associated with the working chamber and compressing the inducted air during a compression stroke;initiating the power stroke and injecting the fuel late ...

CLEANING SYSTEM FOR AN ENGINE EXHAUST COOLER

A system and method operate by, while an engine is operating, automatically determining whether the engine is in a designated state for EGR cooler cleaning. The EGR cooler is operably coupled to the engine to receive hot EGR from an exhaust of the engine and to provide cooled EGR to an intake of the engine. The system and method also include, responsive to the engine not being in the designated state, automatically preventing a water pump system from introducing a cleaning liquid into a gas inlet of the EGR cooler. 1. A method comprising:while an engine is operating, automatically determining whether the engine is in a designated state for exhaust gas recirculation (EGR) cooler cleaning, wherein the EGR cooler is operably coupled to the engine to receive hot EGR from an exhaust of the engine and to provide cooled EGR to an intake of the engine; andresponsive to the engine not being in the designated state, automatically preventing a water pump system from introducing a cleaning liquid into a gas inlet of the EGR cooler.2. The method of claim 1 , further comprising:determining whether the EGR cooler meets a designated cleaning threshold; andresponsive to the EGR cooler meeting the designated cleaning threshold and the engine being in the designated state, introducing, with the water pump system, the cleaning liquid into the gas inlet of the EGR cooler, wherein an amount of the cleaning liquid relative to an amount of the hot EGR entering the EGR cooler is below a level that would cause hydro-lock of the engine.3. The method of claim 2 , wherein determining if the EGR cooler meets the designated cleaning threshold comprises:automatically determining an effectiveness of the EGR cooler; anddetermining whether the effectiveness is below a designated effectiveness level.4. The method of claim 2 , wherein automatically determining whether the engine is in the designated state for EGR cooler cleaning comprises determining whether the engine is operating in a full EGR state. ...

METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE

A method is disclosed for operating an internal combustion engine equipped with an aftertreatment device. The internal combustion engine is equipped with a cylinder having an exhaust gas port intercepted by an exhaust valve, the exhaust valve being actuated by means of a Variable Valve Actuation (VVA) system, An aftertreatment device regeneration is detected, and the exhaust valve closure is anticipated using the Variable Valve Actuation (VVA) system during the aftertreatment device regeneration to provide an exhaust valve actuation profile having an anticipated exhaust valve closure with respect to a baseline exhaust valve actuation profile. 111-. (canceled)12. A method of operating an internal combustion engine having a cylinder with an exhaust gas port interrupted by an exhaust valve operable by a variable valve actuation system to close the exhaust gas port and an exhaust gas aftertreatment system in communication with the exhaust gas port , the method comprising:detecting a regeneration of the aftertreatment system; andanticipating a closure of the exhaust gas port by the exhaust valve, during the aftertreatment device regeneration, using the variable valve actuation system to provide an exhaust valve actuation profile having an anticipated exhaust valve closure with respect to a baseline exhaust valve actuation profile.13. The method according to claim 12 , wherein the exhaust valve actuation profile provides an anticipated closure crank angle with respect to a baseline closure crank angle.14. The method according to claim 13 , wherein the difference between the anticipated closure crank angle and the baseline closure crank angle does not exceed 55°.15. The method according to claim 14 , wherein the difference between the anticipated closure crank angle and the baseline closure crank angle does not exceed 40°.16. The method according to claim 12 , further comprising providing an exhaust valve actuation profile having an anticipated exhaust valve closure with ...

FUZZY CONTROL OF AN INTERNAL COMBUSTION ENGINE

To further reduce pollutant emissions during operation of an internal combustion using an exhaust catalytic converter and in particular to promptly detect and possibly even prevent a departure from the catalytic converter window, a first oxygen filling level in a front area of the exhaust catalytic converter and a second oxygen filling level in a rear area be determined as a function of a signal of a lambda sensor and that the fuel mixture of the internal combustion engine be influenced as a function of the two oxygen filling levels with the aid of a fuzzy controller. 1. A method for controlling operation of an internal combustion engine , an exhaust aftertreatment system being assigned to the internal combustion engine , including at least one exhaust catalytic converter and one lambda sensor situated upstream from the exhaust catalytic converter , the method comprising:determining, as a function of a signal of the lambda sensor, a first oxygen filling level in a front area of the exhaust catalytic converter, and a second oxygen filling level in a rear area of the exhaust catalytic converter; andinfluencing, with the aid of a fuzzy controller, a fuel mixture of the internal combustion engine as a function of the first oxygen filling level and the second oxygen filling level.2. The method as recited in claim 1 , wherein the first oxygen filling level and the second oxygen filling level are determined with the aid of a model of the exhaust catalytic converter.3. The method as recited in claim 1 , wherein a first deviation of the first oxygen filling level from a first setpoint filling level and a first gradient of the first deviation are determined claim 1 , a second deviation of the second oxygen filling level from a second setpoint filling level and a second gradient of a second deviation are determined claim 1 , and the fuel mixture of the internal combustion engine is influenced as a function of the first and second deviations and of the first and second ...

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 ...

CONTROL SYSTEM

A control system is provided for a diesel particulate filter (DPF) system of a diesel engine configured for operation in an off-highway vehicle. The control system includes a controller configured to receive a signal corresponding to a fill state of the DPF being at or above a first threshold. The controller is configured to selectively induce a parasitic load on the diesel engine to increase an operating temperature of the engine in response to receiving the signal.

CONTROLLER FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE

A controller for an internal combustion engine includes processing circuitry that performs a dither control process on condition that a temperature increase request of a catalyst is made. The processing circuitry operates fuel injection valves so that during the dither control process, one or more cylinders are lean combustion cylinders in a first period and another one or more cylinders are rich combustion cylinders and so that the average value of an exhaust gas-fuel ratio is a target air-fuel ratio in a second period including the first period. The dither control process is restricted in a manner that, on condition that the rich process is performed, the degree of richening of the richest exhaust gas-fuel ratio of exhaust gas-fuel ratios in the cylinders is reduced. 1. A controller for an internal combustion engine , wherein the internal combustion engine includes a catalyst , configured to purify exhaust gas discharged from a plurality of cylinders , a plurality of fuel injection valves , respectively configured to supply fuel to the plurality of cylinders , a canister , configured to collect fuel vapor of fuel stored in a fuel tank , and an adjustment device , configured to adjust a flow rate of the fuel vapor collected by the canister flowing into an intake passage , the controller comprising:processing circuitry configured to perform a dither control process on condition that a temperature increase request of the catalyst is made, wherein the dither control process includes operating the fuel injection valves so that one or more of the plurality of cylinders is a lean combustion cylinder in which an air-fuel ratio is leaner than a stoichiometric air-fuel ratio and another one or more of the plurality of cylinders is a rich combustion cylinder in which the air-fuel ratio is richer than the stoichiometric air-fuel ratio, and a purge control process that operates the adjustment device to control a purge rate that is a value obtained by dividing a purge flow rate ...

CONTROLLER FOR INTERNAL COMBUSTION ENGINE

A controller for an internal combustion engine includes a processing circuit that performs a dither control process on condition that a temperature increase request of a catalyst is made. The processing circuit operates fuel injection valves so that during the dither control process, one or more cylinders are lean combustion cylinders in a first period and another one or more cylinders are rich combustion cylinders and so that the average value of an exhaust gas-fuel ratio is a target air-fuel ratio in a second period including the first period. The dither control process is restricted in a manner that, on condition that the rich process is performed, the degree of richening of the richest exhaust gas-fuel ratio of exhaust gas-fuel ratios in the cylinders is reduced. 1. A controller for an internal combustion engine , wherein the internal combustion engine includes a catalyst configured to purify exhaust gas discharged from a plurality of cylinders , and a plurality of fuel injection valves respectively configured to supply fuel to the plurality of cylinders , and the internal combustion engine is configured to allow oxygen to flow into the catalyst without undergoing a combustion stroke , the controller comprisinga processing circuit configured to perform a dither control process on condition that a temperature increase request of the catalyst is made, wherein the processing circuit operates the fuel injection valves so that during the dither control process, one or more of the plurality of cylinders are lean combustion cylinders and another one or more of the plurality of cylinders are rich combustion cylinders in a first period and so that an average value of an exhaust gas-fuel ratio is a target air-fuel ratio in a second period including the first period, and wherein the lean combustion cylinders are cylinders having a leaner air-fuel ratio than a stoichiometric air-fuel ratio, and the rich combustion cylinders are cylinders having a richer air-fuel ratio than ...

METHOD FOR CONTROLLING REGENERATION OF AN EXHAUST GAS AFTERTREATMENT SYSTEM OF AN INTERNAL COMBUSTION ENGINE ARRANGED ON A VEHICLE

The invention concerns a method for controlling regeneration of an exhaust gas aftertreatment system () of an internal combustion engine () arranged on a vehicle (), wherein the vehicle () is provided with a control system configured to control the regeneration in at least a first regeneration strategy mode comprising a first set of predetermined actions to be taken for controlling initialization and performance of regeneration processes. The method comprises the steps of: ()—adapting the control system so as to be configured to alternatively control the regeneration in a second regeneration strategy mode, wherein the second regeneration strategy mode comprises a second set of predetermined actions to be taken for controlling initialization and performance of regeneration processes, and wherein the first and second regeneration strategy modes differ from each other in that the first and second set of predetermined regeneration control actions differ from each other; ()—collecting, during operation of said vehicle () or of another vehicle, data on an exhaust gas regeneration capability of said vehicle () or the other vehicle as a function of time; and ()—evaluating, based on the collected data and the difference between the first and second regeneration strategy modes, whether the first or the second regeneration strategy mode is the most suitable for said vehicle () if operating under conditions corresponding to the operational conditions for the vehicle for which data were collected. The invention also concerns a vehicle arranged to be the subject of such a method and to a computer program product, a computer readable medium and a control system related to performance of the steps of the above method. 1. A method for controlling regeneration of an exhaust gas aftertreatment system of an internal combustion engine of a vehicle , the method comprising:controlling, by a control system, the regeneration in a first regeneration strategy mode comprising a first set of ...

CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

When stopping combustion in a cylinder under a situation in which the crankshaft of an internal combustion engine having an ignition device is rotating, a controller executes a fuel introduction process of injecting fuel from a fuel injection valve and introducing the fuel from inside the cylinder to the exhaust passage without burning the fuel. Also, the controller executes a storing process before starting the fuel introduction process. In the storing process, the controller stores oxygen in a three-way catalyst by executing a fuel cutoff process of stopping fuel injection of the fuel injection valve under a situation in which the crankshaft is rotating. 1. A controller for an internal combustion engine , wherein a fuel injection valve, which injects fuel,', 'an ignition device, which performs spark discharge in a cylinder, and', 'a three-way catalyst provided in an exhaust passage,, 'the internal combustion engine includes'}the internal combustion engine is configured to ignite air-fuel mixture containing fuel injected from the fuel injection valve by spark discharge of the ignition device to burn the air-fuel mixture in the cylinder, andthe controller is configured to:when stopping combustion in the cylinder under a situation in which a crankshaft of the internal combustion engine is rotating, select and execute one of a fuel cutoff process of stopping fuel injection of the fuel injection valve and a fuel introduction process of injecting fuel from the fuel injection valve and introducing the fuel from inside the cylinder to the exhaust passage without burning the fuel; andexecute a storing process of executing the fuel cutoff process to store oxygen in the three-way catalyst before starting the fuel introduction process.2. The controller for an internal combustion engine according to claim 1 , wherein the controller is configured to execute claim 1 , in the storing process claim 1 , the fuel cutoff process until an oxygen storage amount of the three-way ...

Controller for internal combustion engine and method for controlling internal combustion engine

A controller for an internal combustion engine of a spark ignition type is provided. When stopping combustion in a cylinder in a situation in which a crankshaft of the internal combustion engine is rotating, one of a fuel cut process and a fuel feeding process is selectively executed. When combustion is resumed in the cylinder in which the combustion has been stopped, an enrichment process is executed to control a fuel injection valve so that an air-fuel ratio is set to be richer than a stoichiometric air-fuel ratio. When the enrichment process is executed, a decrease amount of an oxygen storage amount of the three-way catalyst corresponding to the enrichment process is set.

A method for controlling the braking of a vehicle comprising a diesel engine

The invention relates to a method for controlling braking of a vehicle (1), comprising a diesel engine (100) and an exhaust after treatment (EAT) system (200) for treating exhaust from said diesel engine (100), a set of ground engaging members (300), and a transmission (400) between said set of ground engaging members (300) and said diesel engine (100). The method comprises: In response to a determined present engine speed being equal to or less than a current engine braking minimum limit speed: changing the gear ratio of said transmission (400) such that an updated engine speed is obtained, whereby a determined present engine speed is above said current engine braking minimum limit speed (S60), and -In response to the determined present engine speed being above said current engine braking minimum limit speed: engine braking so as to decrease said present engine speed (S70). The invention also relates to a computer program, a computer readable medium, a control unit, and a vehicle comprising a control unit.

ENGINE SYSTEM

An engine system may include an engine, an intake line, a cylinder deactivation (CDA) device mounted at a portion of combustion chambers, a first exhaust manifold connected to combustion chambers mounted with the CDA device, a second exhaust manifold connected to combustion chambers without the CDA device, a first exhaust line flowing exhaust gas exhausted from the first exhaust manifold, a second exhaust line flowing exhaust gas exhausted from the second exhaust manifold, a main exhaust line to which the first exhaust line and the second exhaust line are joined, an exhaust gas processing device at which the main exhaust line is installed, a turbocharger mounted at the first exhaust line, an electric supercharger installed at the intake line to supply supercharged air to the combustion chamber and an electric compressor, and an air injection device supplying the fresh air to the second exhaust manifold or the second exhaust line. 1. An engine system comprising:an engine including a plurality of combustion chambers generating a driving torque by combustion of a fuel;an intake line flowing air for supplying the to the combustion chambers;a cylinder deactivation (CDA) device mounted at a portion of combustion chambers among the plurality of combustion chambers and selectively deactivating the portion of combustion chambers;a first exhaust manifold connected to a first plurality of combustion chambers mounted with the CDA device;a second exhaust manifold connected to a second plurality of combustion chambers without the CDA device;a first exhaust line flowing an exhaust gas exhausted from the first exhaust manifold;a second exhaust line flowing an exhaust gas exhausted from the second exhaust manifold;a third exhaust line to which the first exhaust line and the second exhaust line are joined;an exhaust gas processing device at which the third exhaust line is mounted;a turbocharger including a turbine mounted at the first exhaust line and rotated by the exhaust gas and a ...

SYSTEM AND METHOD FOR OPERATING AN ENGINE

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

METHOD OF ESTIMATING OXYGEN STORAGE CAPACITY OF CATALYST

A method of estimating the oxygen storage capacity of a catalyst includes providing an engine system having an internal combustion engine and an exhaust system having a catalyst and an oxygen sensor, providing a three-way catalyst observer model having a Kalman filter and a three-way catalyst kinetic model, estimating a three-way catalyst next time step state and a modeling error, linearizing the three-way catalyst observer model, filtering the estimated three-way catalyst next time step state, and calculating a covariance. 1. A method of estimating an oxygen storage capacity of a three-way catalyst , the method comprising:providing an engine system having an internal combustion engine and an exhaust system including a three-way catalyst and an oxygen sensor;providing a three-way catalyst observer model, the three-way catalyst observer model providing an estimate of the oxygen storage capacity of the three-way catalyst based on a plurality of measured inputs;calculating an estimated three-way catalyst oxygen storage capacity next time step state and a modeling error;linearizing the three-way catalyst observer model;filtering the estimated three-way catalyst oxygen storage capacity next time step state to provide an updated estimated three-way catalyst oxygen storage capacity; andcontrolling a plurality of engine control input variables based on updated estimated three-way catalyst oxygen storage capacity.2. The method of further comprising calculating a result covariance for use in calculating the estimated three-way catalyst oxygen storage capacity next time step state.3. The method of wherein providing a three-way catalyst observer model claim 1 , the three-way catalyst observer model providing an estimate of the oxygen storage capacity of the three-way catalyst based on a plurality of measured inputs further comprises providing a three-way catalyst observer model having a Kalman filter and a three-way catalyst kinetic model claim 1 , the three-way catalyst ...

Exhaust gas purification system

An exhaust gas purification system comprises an exhaust gas purification device which is arranged in an exhaust gas route of an engine, renewing devices for burning and removing a particulate matter within the exhaust gas purification device, renewal advance notifying means which is actuated in the case that a clogged state of the exhaust gas purification device becomes equal to or more than a prescribed level, and renewal informing means which informs of a fact that the renewing devices are under operation. The renewal advance notifying means is actuated before actuating the renewing devices.

Determination of an Ash Loading of a Particulate Filter for an Internal Combustion Engine

A measuring device for the determination of an ash loading of a particulate filter for an internal combustion engine of a motor vehicle, where a regeneration operation of the particulate filter is carried out such that, after termination of the regeneration operation, a predefined, minimum soot loading remains on the particulate filter. The measuring device is configured to determine an actual regeneration variable which is characteristic for a loading combustion operation during the regeneration operation of the particulate filter via a pressure sensor which is attached downstream in the exhaust gas flow of the particulate filter in the exhaust gas system of the internal combustion engine. The measuring device is further configured to determine the ash loading of the particulate filter dependent on the actual regeneration variable and a variable which is characteristic for the time duration of the regeneration operation.

METHOD FOR OPERATING A DRIVE DEVICE AND CORRESPONDING DRIVE DEVICE

An internal combustion engine with a plurality of cylinders is a drive device in which the drive torque available can be reduced. The ignition timing which is set at the internal combustion engine is adjusted in the retarded direction starting from an initial ignition timing until the ignition timing corresponds to a threshold ignition timing. To reduce the drive torque further, at least one cylinder, among the plurality of cylinders, is deactivated by suspending fuel injection into the cylinder, and the remaining cylinder(s) continue to be operated with fuel injection using the ignition timing. The remaining cylinders of the internal combustion engine which continue to be operated are supplied with a quantity of fuel which is larger in comparison with an initial quantity of fuel present before the cylinder deactivation, to set a substoichiometric fuel/oxygen ratio. 110-. (canceled)11. A method for operating a drive device , including an internal combustion engine with a plurality of cylinders , to reduce a drive torque produced by the internal combustion engine , comprising:adjusting ignition timing set at the internal combustion engine in a retarded direction starting from an initial ignition time until the ignition timing corresponds to a threshold ignition timing;deactivating at least one cylinder, among the plurality of cylinders, by suspending fuel injection into the cylinder;continuing to operate each remaining cylinder, not deactivated, using the ignition timing and supplying each remaining cylinder of the internal combustion engine with a subsequent quantity of fuel larger than an initial quantity of fuel supplied before cylinder deactivation, thereby setting a substoichiometric fuel/oxygen ratio.12. The method according to claim 11 , further comprising supplying each remaining cylinder with a quantity of oxygen equal to an initial quantity of oxygen supplied before the cylinder deactivation.13. The method according to claim 12 , further comprising claim 12 ...

METHOD AND SYSTEM FOR IMPROVING EXHAUST SYSTEM EFFICIENCY

Methods and systems are provided for improving efficiency of an exhaust gas after treatment system of a vehicle. In one example, a first group of engine cylinders is operated with a rich air-fuel ratio continuously while a second group of engine cylinders is operated with a lean air-fuel ratio continuously. The rich and lean exhaust gases from the two groups of engine cylinders may be oxidized within an exhaust gas after treatment system to improve catalyst efficiency. 1. An engine operating method , comprising:operating at least one engine cylinder with a rich air-fuel ratio continuously for a plurality of engine cycles and operating at least one engine cylinder with a lean air-fuel ratio continuously for the plurality of engine cycles via a controller in response to an exhaust gas after treatment temperature being less than a threshold temperature, where the rich air-fuel ratio is a function of an amount of heat flux requested to be delivered to an exhaust gas after treatment system.2. The method of claim 1 , where the richness of the rich air-fuel ratio is increased as the amount of heat flux requested increases.3. The method of claim 1 , where the richness of the rich air-fuel ratio is decreased as the amount of heat flux requested decreases.4. The method of claim 1 , further comprising increasing a load of the at least one engine cylinder with the rich air-fuel ratio as the amount of heat flux requested increases.5. The method of claim 1 , further comprising decreasing a load of the at least one engine cylinder with the rich air-fuel ratio as the amount of heat flux requested increases.6. The method of claim 1 , where the amount of heat flux requested is based on an initial temperature of the exhaust gas after treatment system.7. The method of claim 1 , where the amount of heat flux requested is based on a cylinder bank of an engine.8. A system for operating an engine claim 1 , comprising:an engine including an exhaust gas after treatment system; anda ...

Method of Controlling an Engine System

A method of controlling exhaust gas temperature in an engine system including an internal combustion engine, a supercharger, a supercharger bypass arrangement and an exhaust aftertreatment module. The supercharger bypass arrangement is operable to selectively direct intake gas substantially to the supercharger or to direct the intake gas to the engine substantially bypassing the supercharger. The method includes determining an engine load and selectively controlling operation of the supercharger and supercharger bypass arrangement, based upon the engine load, to control the temperature of the exhaust gas to maintain it in a predetermined temperature range associated with the exhaust aftertreatment module.

METHOD, SYSTEM AND COMPUTER PRODUCT FOR EVALUATING THE QUANTITY OF PARTICULATE ACCUMULATED WITHIN A PARTICULATE FILTER OF A DIESEL ENGINE

Particulate accumulation in a particulate filter in the exhaust line of an engine is calculated by an electronic engine control unit. When the estimated accumulated particulate mass exceeds a predetermined threshold, an automatic regeneration step of the filter is activated. An actual instantaneous burned particulate mass is calculated as a function of values indicative of the state of the filter. A temporary correction factor representing an error between a theoretical value and the actual value is calculated. The temporary correction factor is stored in a second map of correction factors, based on the engine operating conditions. During an accumulation step, the estimated instantaneous particulate mass, calculated according to the first map based on the operating conditions of the engine, is multiplied by a correction factor calculated according to the second map based on the operating conditions of the engine. 1. A method for controlling a Diesel engine system , comprising a particulate filter interposed in the exhaust line of the engine , and an electronic engine control unit for controlling a plurality of fuel injectors associated with the cylinders of the engine , wherein—when an estimated accumulated particulate mass in said filter reaches a predetermined threshold—a control mode of the injectors is activated , which causes the start of an automatic regeneration step of the filter , by an increase in the temperature of the exhaust gases sent to the filter sufficient to burn the particulate in the filter , said estimated accumulated particulate mass being calculated as the sum of estimated instantaneous accumulated particulate masses calculated according to a first map based on engine operating conditions , receiving values indicative of the state of the particulate filter,', 'calculating, as a function of said values indicative of the state of the filter, an actual instantaneous burned particulate mass,', 'summing the actual instantaneous burned particulate ...

Electronic Engine Management System and Method for A Truck Mounted Forklift

This invention relates to an electronic engine management system and method for a truck mounted forklift (TMFL). The TMFL electronic engine management system (EEMS) comprises a processor and a memory having computer program instructions loaded thereon. The computer program instructions, when executed by the processor, cause the EEMS to (i) determine when the amount of particulate matter (PM) in the diesel particulate filter (DPF) is above a first predetermined level, PL1; (ii) latch the engine into a DPF regeneration mode, causing the engine to automatically enter DPF regeneration mode each time the engine is turned on until the PM level is below a first regenerated level, RL1; and (iii) unlatch the engine from DPF regeneration mode once the amount of PM in the DPF is below RL1. In this way, the majority of DPF regeneration will be carried out in an active level 2 regeneration mode, avoiding the likelihood of carrying out regeneration at higher regeneration levels. 1) A truck mounted forklift (TMFL) electronic engine management system (EEMS) comprising a processor , a memory having computer program instructions loaded thereon that when executed by the processor , cause the EEMS to:determine when the amount of particulate matter (PM) in the diesel particulate filter (DPF) is at a first predetermined level, PL1;latch the engine into a DPF regeneration mode, thereby causing the engine to automatically enter DPF regeneration mode each time the engine is turned on until the DPF regeneration has been performed and the amount of PM in the DPF is below a first regenerated level, RL1; andunlatch the engine from DPF regeneration mode once the amount of PM in the DPF is below RL1.2) A TMFL electronic engine management system as claimed in in which the EEMS is further programmed to:determine when the amount of PM in the DPF is at a second predetermined level, PL2; andlatching the engine into a parked DPF regeneration mode, prompting the operator to cause the engine to enter ...

ENGINE CONTROLLER AND METHODS FOR CONTROLLING EMISSION AND POWER GENERATION SYSTEM USING THE SAME

A method for controlling an emission amount in an exhaust gas stream emitted from a power generation system is presented. The method includes determining a pre-catalyst emission level using a combustion engine model. The method further includes determining a post-catalyst emission level using a three-way catalyst model based on the pre-catalyst emission level. Furthermore, the method includes determining an adjusted post-catalyst emission level based on the post-catalyst emission level. Moreover, the method includes determining a difference between the post-catalyst emission level and the adjusted post-catalyst emission level and comparing the difference with a threshold value. Additionally, the method includes determining whether to adjust an actual value of an engine operating parameter based on the comparison such that the emission amount in the exhaust gas stream is maintained below an emission regulatory limit. An engine controller and a power generation system employing the method are also presented. 1. A method for controlling an emission amount in a gas stream emitted from a power generation system comprising a combustion engine operating at stoichiometric conditions , and a three-way catalyst disposed downstream of the combustion engine , the method comprising:determining a pre-catalyst emission level using a combustion engine model;determining a post-catalyst emission level using a three-way catalyst model based on the pre-catalyst emission level;determining an adjusted post-catalyst emission level based on the post-catalyst emission level;determining a difference between the post-catalyst emission level and the adjusted post-catalyst emission level and comparing the difference with a threshold value; anddetermining whether to adjust an actual value of an engine operating parameter based on the comparison such that the emission amount in the gas stream is maintained below an emission regulatory limit.2. The method of claim 1 , wherein the adjusted post- ...

EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE

There is provided an exhaust purification apparatus for an internal combustion engine in which a catalyst capable of adsorbing and oxidizing hydrocarbon is provided in an exhaust pipe, the exhaust purification apparatus including temperature detection means for detecting a temperature of the catalyst, estimation means for accumulating a time during which the temperature of the catalyst detected by the temperature detection means is equal to or less than a predetermined temperature, and estimating an amount of hydrocarbon adsorbed on the catalyst from the accumulated time, and control means for controlling fuel ejection of the internal combustion engine in a first ejection mode in which the temperature of the catalyst is increased to a temperature where hydrocarbons adsorbed on the catalyst are oxidized, in a case in which the amount of hydrocarbons estimated by the estimation means exceeds a predetermined upper limit. 1. An exhaust purification apparatus for an internal combustion engine in which a catalyst capable of adsorbing and oxidizing hydrocarbons is provided in an exhaust pipe , the exhaust purification apparatus comprising:temperature detection means for detecting a temperature of the catalyst;estimation means for accumulating a time during which the temperature of the catalyst detected by the temperature detection means is equal to or less than a first predetermined temperature, and estimating an amount of hydrocarbons adsorbed on the catalyst from the accumulated time; andcontrol means for controlling fuel ejection of the internal combustion engine in a first ejection mode in which the temperature of the catalyst is increased to a temperature where hydrocarbons adsorbed on the catalyst are oxidized, in a case in which the amount of hydrocarbons estimated by the estimation means exceeds a predetermined upper limit.2. The exhaust purification apparatus according to claim 1 ,wherein subtraction is performed to the accumulated time when the temperature of the ...

CYLINDER DEACTIVATION FOR CATALYST DRYING

An engine control system and method of controlling an engine system are provided. The engine control system includes at least one sensor module configured to generate an exhaust condition signal based on a determined condition in an exhaust component and a cylinder bank control module communicatively coupled to the at least one sensor module. The cylinder bank control module is configured to cause transmission of a first bank control signal to cause a first bank of cylinders of an engine to deactivate at least in part in response to a determination based on the exhaust condition signal that a hydrocarbon mass quantity is above a pre-determined hydrocarbon mass quantity threshold. 1. An engine control system , comprising:at least one sensor module configured to generate an exhaust condition signal based on a determined condition in an exhaust component; anda cylinder bank control module communicatively coupled to the at least one sensor module, the cylinder bank control module configured to cause transmission of a first bank control signal to cause a first bank of cylinders of an engine to deactivate at least in part in response to a determination based on the exhaust condition signal that a hydrocarbon mass quantity is above a pre-determined hydrocarbon mass quantity threshold.21. The engine control system of , wherein the determined condition is at least one of a hydrocarbon mass quantity , an exhaust temperature , and an exhaust humidity level.31. The engine control system of , wherein the determined condition is an operating time of the exhaust component.41. The engine control system of , wherein the cylinder bank control module is configured to cause transmission of a first bank control signal to cause a first bank of cylinder of an engine to deactivate at least in part in response to a determination that an engine power requirement is below a power threshold.54. The engine control system of , wherein the power threshold corresponds to a maximum power output by ...

METHOD FOR REGENERATING LEAN NOx TRAP OF EXHAUST PURIFICATION SYSTEM PROVIDED WITH LEAN NOx TRAP AND SELECTIVE CATALYTIC REDUCTION CATALYST AND EXHAUST PURIFICATION SYSTEM

A method for regenerating a lean NOx trap (LNT) of an exhaust purification system having the LNT and a selective catalytic reduction (SCR) catalyst includes determining whether a regeneration release condition of the LNT is satisfied; determining whether a regeneration demand condition of the LNT is satisfied; and performing regeneration of the LNT if the regeneration release condition of the LNT and the regeneration demand condition of the LNT are satisfied, wherein satisfaction of the regeneration release condition of the LNT is determined based on an NOx amount absorbed in the LNT, an NH3 amount stored in the SCR catalyst and temperature at an upstream of the SCR catalyst. 1. A method for regenerating a lean NOx trap (LNT) of an exhaust purification system having the LNT and a selective catalytic reduction (SCR) catalyst , comprising:determining whether a regeneration release condition of the LNT is satisfied;determining whether a regeneration demand condition of the LNT is satisfied; andperforming regeneration of the LNT when the regeneration release condition of the LNT and the regeneration demand condition of the LNT are satisfied,wherein satisfaction of the regeneration release condition of the LNT is determined based on an NOx amount absorbed in the LNT, an NH3 amount stored in the SCR catalyst, and temperature at an upstream of the SCR catalyst.2. The method of claim 1 , wherein the regeneration release condition of the LNT is satisfied when the NOx amount absorbed in the LNT is greater than or equal to a threshold NOx amount claim 1 , and a final factor calculated based on a base factor claim 1 , a first correction factor according to the NH3 amount stored in the SCR catalyst claim 1 , and a second correction factor according to the temperature at the upstream of the SCR catalyst is greater than or equal to a predetermined value.3. The method of claim 2 , wherein the first correction factor decreases or is maintained as the NH3 amount stored in the SCR ...

CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE

The control system of the internal combustion engine comprises a control part controlling an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst. The control part alternately sets a target air-fuel ratio between a rich air-fuel ratio and a lean air-fuel ratio and controls the air-fuel ratio of the exhaust gas so that an output air-fuel ratio of the air-fuel ratio sensor becomes the target air-fuel ratio. The control part corrects the output air-fuel ratio of the air-fuel ratio sensor so that when a scavenging occurs, the air-fuel ratio of the exhaust gas changes to a rich side more than an amount of deviation expected to occur in the output air-fuel ratio due to the occurrence of the scavenging. The control part increases a lean degree of the target air-fuel ratio when the scavenging occurs compared with when the scavenging does not occur. 1. A control system of an internal combustion engine controlling an internal combustion engine comprisinga variable valve timing mechanism able to change an amount of valve overlap between an intake valve and an exhaust valve,an exhaust purification catalyst arranged in an exhaust passage and able to store oxygen, andan upstream side air-fuel ratio sensor arranged at an upstream side of the exhaust purification catalyst in a direction of exhaust flow and detecting an air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst, whereinthe control system comprises a control part controlling an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst,the control part alternately sets a target air-fuel ratio between a rich air-fuel ratio richer than a stoichiometric air-fuel ratio and a lean air-fuel ratio leaner than the stoichiometric air-fuel ratio and controls the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst so that an output air-fuel ratio of the upstream side air-fuel ratio sensor becomes the target air-fuel ratio,the ...

Method and exhaust system for checking a loading state of a particle filter

A method for checking a load condition of a particulate filter in an exhaust line of an internal combustion engine, wherein the exhaust line comprises at least the particulate filter, a first lambda sensor that is arranged upstream from the particulate filter, and a second lambda sensor that is arranged downstream from the particulate filter, includes at least the following steps: introducing an exhaust gas with an excess of oxygen into the exhaust line upstream from the first lambda sensor, there being a temperature of at least 500° C. in the particulate filter; detecting the excess of oxygen by the first lambda sensor at a first time; detecting the excess of oxygen by the second lambda sensor at a second time; and determining a load condition of the particulate filter from a time difference between the first time and the second time. The invention further relates to an exhaust system of a motor vehicle.

INTERNAL COMBUSTION ENGINE CONTROL METHOD AND CONTROL DEVICE

An internal combustion engine () is provided with an exhaust particulate filter () disposed in an exhaust passage (). When the particulate deposition amount and the temperature of the exhaust particulate filter () meet a predetermined excessive temperature rise condition, fuel cut during deceleration is prohibited. When a predetermined release condition is satisfied during the prohibition of the fuel cut, the fuel cut is temporarily permitted to perform the regeneration of the exhaust particulate filter (). 18.-. (canceled)9. A method for controlling an internal combustion engine which performs combustion mainly at a theoretical air-fuel ratio , the internal combustion engine being provided with an exhaust particulate filter disposed in an exhaust passage , the method comprising:detecting or estimating an exhaust particulate deposition amount and a temperature of the exhaust particulate filter;prohibiting fuel cut during deceleration when the exhaust particulate deposition amount and the temperature meet a predetermined excessive temperature rise condition; andperforming temporary oxygen supply to the exhaust particulate filter when a predetermined release condition is further satisfied during the fuel cut prohibition.10. The method for controlling the internal combustion engine according to claim 9 , wherein claim 9 , by using the exhaust particulate deposition amount and the temperature as parameters claim 9 , the excessive temperature rise condition is defined so as to have a characteristic in which the larger the exhaust particulate deposition amount becomes claim 9 , the lower a temperature threshold value becomes.11. The method for controlling the internal combustion engine according to claim 9 , wherein a number of times of the temporary oxygen supply is limited to a predetermined number of times or less in one time of coast travel.12. The method for controlling the internal combustion engine according to claim 9 , wherein continuation time in one time of the ...

DEVICE AND METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE HAVING A CATALYTIC CONVERTER

A device and method for controlling an internal combustion engine having a catalytic converter. At least one actuating variable for the internal combustion engine is determined as a function of a system model of the catalytic converter and/or the internal combustion engine. The system model, a setpoint variable for the control and/or the actuating variable is adapted. Information about a modeled residual oxygen content in the exhaust gas downstream from the catalytic converter is determined using the system model. Information about an acquired residual oxygen content in the exhaust gas at the output of the catalytic converter is acquired. The information about the modeled residual oxygen content is compared with the information about the acquired residual oxygen content. A measure for an adaptation requirement is determined as a function of the result of the comparison. 113-. (canceled)14. A method for controlling an internal combustion engine having a catalytic converter , the method comprising the following steps:determining at least one actuating variable for the internal combustion engine as a function of a system model of: the catalytic converter and/or the internal combustion engine;adapting the system model, and/or at least one setpoint variable for the controlling and/or the at least one actuating variable;determining information about a modeled residual oxygen content in exhaust gas downstream from the catalytic converter, using the system model;acquiring information about an acquired residual oxygen content in exhaust gas at an output of the catalytic converter;comparing the information about the modeled residual oxygen content with the information about the acquired residual oxygen content;determining at least one measure for an adaptation requirement as a function of a result of the comparison; anddetermining at least one value for: the system model, and/or the at least one setpoint variable for the controlling, and/or the at least one actuating variable ...

Abnormality diagnosis system of internal combustion engine

An abnormality diagnosis system of an internal combustion engine which is provided with an exhaust purification catalyst 20 which can store oxygen is provided with a downstream side air-fuel ratio sensor 41 downstream of the catalyst and a catalyst abnormality diagnosis system which uses an output air-fuel ratio of the downstream side air-fuel ratio sensor when performing active air-fuel ratio control as the basis for diagnosing an exhaust purification catalyst for abnormality. The catalyst abnormality diagnosis system uses the amount of oxygen which is stored in or released from the exhaust purification catalyst in an air-fuel ratio reversal time period in active air-fuel ratio control as the basis to calculate the maximum storable oxygen amount of the exhaust purification catalyst and uses this as the basis to diagnose the exhaust purification catalyst for abnormality.