DE102009035579A1 - Method for operating diesel engine of motor vehicle, involves determining target value of nitrogen oxide concentration by engine characteristic map by sensor, and regulating internal combustion engine to target value by sensor - Google Patents

Method for operating diesel engine of motor vehicle, involves determining target value of nitrogen oxide concentration by engine characteristic map by sensor, and regulating internal combustion engine to target value by sensor Download PDF

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DE102009035579A1
DE102009035579A1 DE102009035579A DE102009035579A DE102009035579A1 DE 102009035579 A1 DE102009035579 A1 DE 102009035579A1 DE 102009035579 A DE102009035579 A DE 102009035579A DE 102009035579 A DE102009035579 A DE 102009035579A DE 102009035579 A1 DE102009035579 A1 DE 102009035579A1
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engine
sensor
nitrogen oxide
target value
exhaust gas
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DE102009035579A
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German (de)
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Olaf Dr. Toedter
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BorgWarner Ludwigsburg GmbH
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Beru AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0052—Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • F02D41/1461—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration of the exhaust gases emitted by the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The method involves measuring nitrogen oxide concentration in exhaust gas by a nitrogen oxide sensor that is arranged before an exhaust gas purification catalyst in exhaust gas flow direction. A target value of nitrogen oxide concentration is determined using an engine characteristic map in dependence upon an engine load and engine speed by the sensor. An internal combustion engine is regulated to the target value by the sensor by adjusting exhaust gas recirculation and fuel injection. An independent claim is also included for an engine control unit with an input for connection to a nitrogen oxide sensor.

Description

Die Erfindung geht aus von einem Verfahren zum Betreiben eines Verbrennungsmotors, wobei mit einem NOx-Sensor die Stickoxidkonzentration im Abgas gemessen wird. Beim Betrieb eines Verbrennungsmotors entstehen Stickoxide, insbesondere NO und NO2.The invention is based on a method for operating an internal combustion engine, wherein the NOx concentration in the exhaust gas is measured with a NOx sensor. During operation of an internal combustion engine, nitrogen oxides, in particular NO and NO 2, are formed .

Aus der DE 101 42 669 A1 ist es bekannt, mit einem NOx-Sensor die Stickoxidkonzentration hinter einem NOx-Speicherkatalysator zu messen. Werden dabei erhöhte Stickoxidkonzentrationen festgestellt, wird über die Motorsteuerung eine Reinigung des Katalysators bewirkt, indem die Abgastemperatur erhöht und der Kraftstoffanteil im Abgas kurzzeitig erhöht wird. Dies kann durch Zündwinkelspätverstellung, Doppeleinspritzung und Bankvertrimmung erreicht werden.From the DE 101 42 669 A1 It is known to measure with a NOx sensor, the nitrogen oxide concentration behind a NOx storage catalyst. If increased nitrogen oxide concentrations are detected, a purification of the catalyst is effected by the engine control by increasing the exhaust gas temperature and increasing the fuel content in the exhaust gas for a short time. This can be achieved by ignition retard, double injection and bank clearing.

Bei der Implementierung von Motorsteuerungen besteht in der Regel ein Zielkonflikt zwischen einem möglichst sparsamen Kraftstoffverbrauch und einer möglichst geringen Rohemission von Abgasen. In der Regel beruhen moderne Motorsteuerungen deshalb auf einem Kompromiss zwischen Kraftstoffverbrauch und Schadstoffemission.at The implementation of engine controls is usually a Target conflict between the most economical fuel consumption and the lowest possible raw emission of exhaust gases. In As a rule, modern engine control systems are therefore based on a compromise between fuel consumption and pollutant emission.

Aufgabe der vorliegenden Erfindung ist es, einen Weg aufzuzeigen, wie der Zielkonflikt zwischen einem möglichst sparsamen Kraftstoffverbrauch und einer möglichst geringen Rohemission von Abgasen besser gelöst werden kann.task The present invention is to show a way how the Target conflict between the most economical fuel consumption and the lowest possible raw emission of exhaust gases better can be solved.

Diese Aufgabe wird durch ein Verfahren mit den im Anspruch 1 angegebenen Merkmalen gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand von Unteransprüchen.These The object is achieved by a method with the specified in claim 1 Characteristics solved. Advantageous developments of the invention are the subject of dependent claims.

Bei einem erfindungsgemäßen Verfahren werden Stickoxidkonzentrationen im Abgasstrom mit einem NOx-Sensor gemessen, der in Abgasströmungsrichtung vor einem Abgasreinigungskatalysator angeordnet ist. Mittels eines Kennfeldes wird ein Sollwert der Stickoxidkonzentration ermittelt und der Motor auf den Sollwert geregelt. Auf diese Weise kann ein Verbrennungsmotor effizienter gesteuert werden. Dies bedeutet, dass bei gleichem Kraftstoffverbrauch weniger Stickoxid erzeugt wird oder bei gleicher Stickoxidkonzentration der Kraftstoffverbrauch reduziert werden kann.at A process according to the invention becomes nitrogen oxide concentrations measured in the exhaust stream with a NOx sensor in the exhaust gas flow direction is arranged in front of an exhaust gas purification catalyst. By means of a Characteristic a setpoint of the nitrogen oxide concentration is determined and the motor is regulated to the setpoint. This way you can Internal combustion engine can be controlled more efficiently. This means that less nitrogen oxide is produced at the same fuel consumption or at the same nitrogen oxide fuel consumption can be reduced.

Die Rohemissionen eines Kraftfahrzeugmotors von Stickoxiden, Partikeln, Kohlenmonoxid und Kohlenwasserstoffen hängen nämlich nicht nur vom Betriebszustand des Motors, insbesondere Motordrehzahl und Motorlast, sondern auch von Faktoren ab, die durch die Motorsteuerung nicht beeinflusst werden können, beispielsweise Fertigungstoleranzen und Abnutzungsgrad von Motorkomponenten sowie der Kraftstoffqualität. Derartige Einflussfaktoren sind beim Implementieren einer Motorsteuerung nicht oder nur unzureichend bekannt und können deshalb auch nicht berücksichtigt werden. Dies führt dazu, dass Motoren im Stand der Technik häufig in suboptimalen Kennfeldbereichen betrieben werden und dynamischer Situation nur unzureichend berücksichtigt werden können.The Raw emissions of a motor vehicle engine from nitrogen oxides, particles, Carbon monoxide and hydrocarbons depend on it not only on the operating condition of the engine, especially engine speed and engine load, but also from factors caused by the engine control can not be affected, for example, manufacturing tolerances and degree of wear of engine components and fuel quality. Such influencing factors are not involved in implementing a motor control or insufficiently known and therefore can not be taken into account. This causes engines in the prior art often in sub-optimal map areas be operated and dynamic situation only insufficiently taken into account can be.

Durch Messung der Stickoxidkonzentration in unbehandeltem Abgas kann eine Zielgröße, nämlich die Stickoxidemission, direkt gemessen und als Führungsgröße bei der Motorsteuerung verwendet werden. Mit einem erfindungsgemäßen Verfahren kann ein Motor deshalb effizienter gesteuert bzw. geregelt werden als es ohne Kenntnis der Stickoxidkonzentration möglich wäre.By Measurement of the nitrogen oxide concentration in untreated exhaust gas can be a Target size, namely the nitrogen oxide emission, measured directly and as a reference be used in the engine control. With an inventive Therefore, an engine can be controlled more efficiently become possible without knowing the nitric oxide concentration would.

Der Sollwert der Stickoxidkonzentration kann mittels eines Kennfeldes in Abhängigkeit von der Motorlast und/oder von der Motordrehzahl ermittelt werden. Die Regelung der Stickoxidkonzentration auf den Sollwert kann beispielsweise erfolgen, indem die Kraftstoffeinspritzung, insbesondere der Einspritzbeginn und/oder die Einspritzmenge, eingestellt werden. Eine weitere Möglichkeit besteht darin, den Motor durch Einstellen einer Abgasrückführung auf den Sollwert zu regeln. Durch Einstellen einer Abgasrückführung kann die rückgeführte Abgasmenge optimal an den Motorzustand angepasst und somit eine für den momentanen Betriebszustand hinsichtlich Kraftstoffverbrauch, Motorlast und anderen Randbedingungen optimale Stickoxidkonzentrationen im Abgas realisiert werden.Of the Setpoint of the nitrogen oxide concentration can be determined by means of a characteristic map depending on engine load and / or engine speed be determined. The regulation of the nitrogen oxide concentration on the Setpoint can be done, for example, by the fuel injection, in particular the start of injection and / or the injection quantity, set become. Another possibility is the engine by setting an exhaust gas recirculation to the setpoint to regulate. By adjusting an exhaust gas recirculation can the recirculated exhaust gas optimally to the Engine state adjusted and thus one for the current Operating condition with regard to fuel consumption, engine load and other boundary conditions optimal nitrogen oxide concentrations realized in the exhaust gas become.

Das erfindungsgemäße Verfahren wird bevorzugt bei Dieselmotoren eingesetzt, kann prinzipiell jedoch auch bei anderen Verbrennungsmotoren verwendet werden.The inventive method is preferred Diesel engines used, but can in principle also in other Internal combustion engines are used.

Der erfindungsgemäß verwendete Stickoxidsensor ist bevorzugt am Motorauslass angeordnet, so dass Stickoxidkonzentrationen möglichst zeitnah zur Kraftstoffverbrennung ermittelt werden können. Vorteilhaft kann am Auslass jedes Motorzylinders ein NOx-Sensor angeordnet werden. Der Motorbetrieb kann auf diese Weise besonders präzise für jeden einzelnen Zylinder auf den Sollwert geregelt werden. Auf diese Weise können selbst kleine Abweichungen zwischen den einzelnen Zylindern eines Motors berücksichtigt werden. Prinzipiell kann aber auch mit nur einem einzigen NOx-Sensor die Stickoxidkonzentration zylinderselektiv ermittelt werden, beispielsweise indem der NOx-Sensor an einem Sammler, der die Auslässe der einzelnen Zylinder verbindet, angeordnet ist. Bevorzugt wird der Motorbetrieb der einzelnen Zylinder unter Berücksichtigung weiter Sensorsignale, beispielsweise der Signale eines Drucksensors, geregelt.Of the Nitrogen sensor used in the invention is preferably arranged at the engine outlet, so that nitrogen oxide concentrations be determined as soon as possible for fuel combustion can. Advantageously, at the outlet of each engine cylinder a NOx sensor can be arranged. Engine operation can be on this Way very precise for each cylinder be regulated to the setpoint. That way you can even small deviations between the individual cylinders of one Motors are considered. In principle, but also The nitrogen oxide concentration is cylinder-selective with just a single NOx sensor determined, for example by the NOx sensor to a collector, which connects the outlets of the individual cylinders arranged is. Preferably, the engine operation of the individual cylinders is under Considering further sensor signals, for example the Signals from a pressure sensor, regulated.

Die Erfindung betrifft ferner ein Motorsteuergerät gemäß Anspruch 13. Ein solches Motorsteuergerät führt im Betrieb das beschriebene Verfahren durch. Beispielsweise kann in einem Speicher des Motorsteuergeräts ein Programm gespeichert sein, das bei Ablauf das beschriebene Verfahren bewirkt. Insbesondere können in dem Speicher des Motorgeräts Kennfelder gespeichert sein, mit denen ein Sollwert für die Stickoxidkonzentration in Abhängigkeit von der Motordrehzahl und der Motorlast bestimmt wird. Ansonsten benötigt das Motorsteuergerät im Vergleich zu handelsüblichen Motorsteuergeräten lediglich einen Eingang, mit dem es an einen NOx-Sensor angeschlossen werden kann, um Messwerte der Stickoxidkonzentration zu erhalten. Ausgänge, über die Steuersignale bereitgestellt werden können, sowie ein Mikroprozessor als Steuereinheit sind bei Motorsteuergeräten üblicherweise vorhanden und bedürfen deshalb keiner weiteren Erläuterung.The The invention further relates to an engine control unit according to claim 13. Such an engine control unit leads in operation the described method. For example, in a memory be saved to the engine control unit a program that at expiration causes the described method. In particular, you can stored in the memory of the power unit maps with which a setpoint for the nitrogen oxide concentration depending on engine speed and engine load is determined. Otherwise, the engine control unit is required in comparison to commercially available engine control units only one input, with which it is connected to a NOx sensor can be used to obtain measured values of the nitrogen oxide concentration. Outputs provided via the control signals and a microprocessor as a control unit are usually present in engine control units and therefore require no further explanation.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - DE 10142669 A1 [0002] - DE 10142669 A1 [0002]

Claims (13)

Verfahren zum Betreiben eines Verbrennungsmotors, wobei mit einem NOx-Sensor die Stickoxidkonzentration im Abgas gemessen wird, dadurch gekennzeichnet, dass der NOx-Sensor in Abgasströmungsrichtung vor einem Abgasreinigungskatalysator angeordnet ist, mittels eines Kennfeldes ein Sollwert der Stickoxidkonzentration ermittelt und der Motor auf den Sollwert geregelt wird.Method for operating an internal combustion engine, wherein the NOx concentration in the exhaust gas is measured with a NOx sensor, characterized in that the NOx sensor is arranged in the exhaust gas flow direction in front of an exhaust gas purification catalyst, determined by means of a map, a target value of the nitrogen oxide concentration and the engine is controlled to the desired value becomes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Motor durch Einstellen einer Abgasrückführung auf den Sollwert geregelt wird.Method according to claim 1, characterized in that that the engine by adjusting an exhaust gas recirculation is regulated to the setpoint. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Motor durch Einstellen der Kraftstoffeinspritzung auf den Sollwert geregelt wird.Method according to one of the preceding claims, characterized in that the engine is adjusted by adjusting the fuel injection is regulated to the setpoint. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass der Motor durch Einstellen des Einspritzbeginns auf den Sollwert geregelt wird.Method according to claim 3, characterized that the engine is adjusted to the setpoint by setting the start of injection is regulated. Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Motor durch Einstellen der Einspritzmenge auf den Sollwert geregelt wird.Method according to claim 3 or 4, characterized that the engine by adjusting the injection quantity to the setpoint is regulated. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Sollwert mittels eines Kennfeldes in Abhängigkeit von der Motorlast ermittelt wird.Method according to one of the preceding claims, characterized in that the desired value by means of a map is determined as a function of the engine load. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Sollwert mittels eines Kennfeldes in Abhängigkeit von der Motordrehzahl ermittelt wird.Method according to one of the preceding claims, characterized in that the desired value by means of a map is determined as a function of the engine speed. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der NOx-Sensor am Motorauslass angeordnet ist.Method according to one of the preceding claims, characterized in that the NOx sensor is arranged at the engine outlet is. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass Stickoxidwerte für jeden einzelnen Motorzylinder ermittelt werden und der Motorbetrieb für jeden einzelnen Zylinder auf den Sollwert geregelt wird.Method according to one of the preceding claims, characterized in that nitrogen oxide values for each individual Engine cylinder are determined and the engine operation for every single cylinder is regulated to the nominal value. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der NOx-Sensor an einem Sammler, der die Auslässe der Motorzylinder verbindet, angeordnet ist.Method according to one of the preceding claims, characterized in that the NOx sensor on a collector, the the outlets of the engine cylinder connects, is arranged. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass am Auslass jedes Motorzylinders ein NOx-Sensor angeordnet ist.Method according to one of the preceding claims, characterized in that at the outlet of each engine cylinder a NOx sensor is arranged. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Motor ein Dieselmotor ist.Method according to one of the preceding claims, characterized in that the engine is a diesel engine. Motorsteuergerät mit einem Eingang zum Anschluss an einen NOx-Sensor und einem Ausgang zum Bereitstellen von Steuersignalen, dadurch gekennzeichnet, dass das Motorsteuergerät dafür eingerichtet ist, im Betrieb ein Verfahren nach einem der vorstehenden Ansprüche durchzuführen.Engine control unit with an input to the Connection to a NOx sensor and an output to provide of control signals, characterized in that the engine control unit is set up in operation a method according to a to carry out the preceding claims.
DE102009035579A 2009-07-28 2009-07-28 Method for operating diesel engine of motor vehicle, involves determining target value of nitrogen oxide concentration by engine characteristic map by sensor, and regulating internal combustion engine to target value by sensor Withdrawn DE102009035579A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013012568A1 (en) * 2013-07-29 2015-01-29 Man Diesel & Turbo Se Method for operating an internal combustion engine
CN106014571A (en) * 2016-05-31 2016-10-12 无锡威孚力达催化净化器有限责任公司 Method for calculating original engine NOx values of engines
EP3120005A4 (en) * 2014-03-21 2017-11-15 Westport Power Inc. Method and system for operating gaseous-fuelled direct injection internal combustion engine

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DE10126580A1 (en) * 2000-06-09 2001-12-13 Mack Trucks Device and method for exhaust gas recirculation
DE10142669A1 (en) 2001-08-31 2003-04-03 Bayerische Motoren Werke Ag Purification of engine exhaust gas catalyst involves shifting ignition angle using ignition device by angle adjustment, and supplying cylinder groups with air-fuel mixture
DE10101848A1 (en) * 2001-01-17 2004-02-05 Bayerische Motoren Werke Ag Process for regulating the combustion process in an IC engine, especially a lifting cylinder combustion engine, comprises returning part of the exhaust gas to the combustion chamber for further combustion
DE10329328A1 (en) * 2003-06-30 2005-02-03 Siemens Ag Method for controlling an internal combustion engine
DE102004044993A1 (en) * 2003-09-17 2005-04-28 Gen Motors Corp NOx control system for cam phaser and / or EGR systems
AT506085A4 (en) * 2008-04-07 2009-06-15 Ge Jenbacher Gmbh & Co Ohg Internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10126580A1 (en) * 2000-06-09 2001-12-13 Mack Trucks Device and method for exhaust gas recirculation
DE10101848A1 (en) * 2001-01-17 2004-02-05 Bayerische Motoren Werke Ag Process for regulating the combustion process in an IC engine, especially a lifting cylinder combustion engine, comprises returning part of the exhaust gas to the combustion chamber for further combustion
DE10142669A1 (en) 2001-08-31 2003-04-03 Bayerische Motoren Werke Ag Purification of engine exhaust gas catalyst involves shifting ignition angle using ignition device by angle adjustment, and supplying cylinder groups with air-fuel mixture
DE10329328A1 (en) * 2003-06-30 2005-02-03 Siemens Ag Method for controlling an internal combustion engine
DE102004044993A1 (en) * 2003-09-17 2005-04-28 Gen Motors Corp NOx control system for cam phaser and / or EGR systems
AT506085A4 (en) * 2008-04-07 2009-06-15 Ge Jenbacher Gmbh & Co Ohg Internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013012568A1 (en) * 2013-07-29 2015-01-29 Man Diesel & Turbo Se Method for operating an internal combustion engine
EP3120005A4 (en) * 2014-03-21 2017-11-15 Westport Power Inc. Method and system for operating gaseous-fuelled direct injection internal combustion engine
US10167786B2 (en) 2014-03-21 2019-01-01 Westport Power Inc. Method and system for operating gaseous-fuelled direct injection internal combustion engine
CN110700953A (en) * 2014-03-21 2020-01-17 西港能源有限公司 Gas fuel direct injection type internal combustion engine
CN110700953B (en) * 2014-03-21 2022-05-24 西港燃料***加拿大公司 Gas fuel direct injection type internal combustion engine
CN106014571A (en) * 2016-05-31 2016-10-12 无锡威孚力达催化净化器有限责任公司 Method for calculating original engine NOx values of engines
CN106014571B (en) * 2016-05-31 2018-10-19 无锡威孚力达催化净化器有限责任公司 The computational methods of engine original machine NOx value

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