DE102011078458A1 - Combustion method for four-stroke reciprocating internal combustion engine with spark ignition, involves operating internal combustion engine with stoichiometric fuel-air mixture, and changing load in cylinder of internal combustion engine - Google Patents
Combustion method for four-stroke reciprocating internal combustion engine with spark ignition, involves operating internal combustion engine with stoichiometric fuel-air mixture, and changing load in cylinder of internal combustion engine Download PDFInfo
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- DE102011078458A1 DE102011078458A1 DE102011078458A DE102011078458A DE102011078458A1 DE 102011078458 A1 DE102011078458 A1 DE 102011078458A1 DE 102011078458 A DE102011078458 A DE 102011078458A DE 102011078458 A DE102011078458 A DE 102011078458A DE 102011078458 A1 DE102011078458 A1 DE 102011078458A1
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- combustion engine
- internal combustion
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0261—Controlling the valve overlap
- F02D13/0265—Negative valve overlap for temporarily storing residual gas in the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
- F02D13/0219—Variable control of intake and exhaust valves changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
-
- 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]
- F02D41/006—Controlling exhaust gas recirculation [EGR] using internal EGR
-
- 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
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
- F02D41/3035—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the premixed charge compression-ignition mode
-
- 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
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3064—Controlling fuel injection according to or using specific or several modes of combustion with special control during transition between modes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/01—Internal exhaust gas recirculation, i.e. wherein the residual exhaust gases are trapped in the cylinder or pushed back from the intake or the exhaust manifold into the combustion chamber without the use of additional passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/12—Engines characterised by fuel-air mixture compression with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0207—Variable control of intake and exhaust valves changing valve lift or valve lift and timing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
-
- 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
- Y02T10/12—Improving ICE efficiencies
-
- 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)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Die Erfindung betrifft ein Brennverfahren für eine Viertakt-Hubkolben-Brennkraftmaschine mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1.The invention relates to a combustion method for a four-stroke reciprocating internal combustion engine with the features of the preamble of patent claim 1.
Eine gattungsgemäße Brennkraftmaschine sowie ein Betriebsverfahren für die Brennkraftmaschine ist beispielsweise aus der deutschen Offenlegungsschrift
Werter ist aus der deutschen Offenlegungsschrift
Nachteilig an dem bekannten Stand der Technik ist die in der Praxis nur schwer kontrollierbare Kompressionszündung.A disadvantage of the known prior art is difficult to control compression ignition in practice.
Aufgabe der vorliegenden Erfindung ist es, ein stöchiometrisches, fremdgezündetes Brennverfahren aufzuzeigen, welches eine stabile, kontrollierbare Verbrennung aufweist und kraftstoffsparend ist.The object of the present invention is to disclose a stoichiometric, spark-ignited combustion process which has stable, controllable combustion and is fuel-efficient.
Diese Aufgabe wird durch das Merkmal im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is achieved by the feature in the characterizing part of patent claim 1.
Durch das erfindungsgemäße Zurückhalten von heißem Restgas, bzw. Abgas im Zylinder wird die Restgasverträglichkeit bei der Verbrennung wesentlich erhöht und das Durchbrennverhalten verbessert. Durch die Ähnlichkeit der Ladungswechselstrategie wird bei einer Kombination des erfindungsgemäßen Brennverfahrens mit einem HCCI-Brennverfahren (homogenous charge compression ignition) eine Betriebsartenumschaltung von Selbst- auf Fremdzündung möglich, bei der nur die Ein- bzw. Auslassgaswechselventile verstellt (Hub und/oder Spreizung) werden und keine Verstellung der Drosselklappe und/oder ggf. des Anstellwinkels des AGR-Ventils (Abgasrückführventil) erfolgt. Hierdurch ist eine schnellere und exaktere Betriebsartenumschaltung zwischen dem erfindungsgemäßen Brennverfahren und einem HCCI-Brennverfahren möglich (Vermeidung von „Überschwingern”) durch eine Steuerung direkt an den Ladungswechselorganen, bei geringeren Stellwegen bezüglich Gaswechselventilhub bzw. Nockenwellenspreizung. Durch die gegenüber einem konventionellen Otto-Brennverfahren geänderte Ladungswechselstrategie müssen keine Spreizungen kleiner 70° in Form von Ventiltaschen im Kolben vorgehalten werden. Dies gestattet eine günstigere Brennraumgestaltung und kleinere Feuerstege sind auch möglich. Hieraus resultieren folgende Vorteile:
- 1. Geringere HC-Rohemission (Kohlenwasserstoffrohemission), was zu einer Entlastung der Abgasnachbehandlung führt, d. h. zur Erfüllung der gleichen Emissionsstufe ist eine geringere Edelmetallbeladung des Katalysators ausreichend bzw. ist die Darstellung einer höheren Emissionsstufe mit gleicher Edelmetallbeladung möglich.
- 2. Günstigere Brennraumgestaltung, d. h. eine verringerte Klopf- bzw. Vorentflammungsneigung. Hierdurch sind höhere Aufladegrade bzw. eine Erhöhung des Verdichtungsverhältnisses möglich, was zu einer Verbesserung des Wirkungsgrades und einer Verringerung des Kraftstoffverbrauchs führt.
- 1. Lower HC raw emission (hydrocarbon raw emission), which leads to a relief of the exhaust aftertreatment, ie to fulfill the same emission level is a lower noble metal loading of the catalyst is sufficient or the representation of a higher emission level with the same precious metal loading is possible.
- 2. Cheaper combustion chamber design, ie a reduced knock or Vorentflammungsneigung. As a result, higher Aufladegrade or an increase in the compression ratio are possible, which leads to an improvement in the efficiency and a reduction in fuel consumption.
Vorteilhafte Weiterbildungen des erfindungsgemäßen Brennverfahrens sind in den Unteransprüchen beschrieben.Advantageous developments of the combustion process according to the invention are described in the subclaims.
In vorteilhafter Weise lässt sich das Brennverfahren von knapp über einer Leerlaufdrehzahl bis zu einer maximalen Drehzahl bei einer niedrigen Last der Brennkraftmaschine einsetzen.Advantageously, the combustion process can be used from just above an idling speed to a maximum speed at a low load of the internal combustion engine.
Ferner ist es möglich, den Kraftstoff direkt in den Brennraum einzubringen, wodurch eine nochmalige Reduzierung des Kraftstoffverbrauchs möglich ist.Further, it is possible to introduce the fuel directly into the combustion chamber, whereby a further reduction in fuel consumption is possible.
Mit einem ein- und/oder auslassseitig vorgesehenen hub- und/oder zweitvariablen Ventiltrieb, lässt sich die im Zylinder zurückgehaltene Abgasmenge besonders gut einstellen.With a provided on the inlet side and / or outlet side hub and / or second variable valve train, the amount of exhaust gas retained in the cylinder can be adjusted particularly well.
Mit Hilfe einer zusätzlichen externen Abgasrückführung (AGR) ergeben sich die größten Kraftstoffverbrauchsvorteile.With the help of an additional external exhaust gas recirculation (EGR) results in the largest fuel consumption advantages.
Die Erfindung bezieht sich auf ein Brennverfahren für eine Viertakt-Hubkolben-Brennkraftmaschine mit einer Fremdzündung, die mit einem stöchiometrischen Kraftstoff-Luft-Gemisch betreibbar ist. Für den Ladungswechsel sind für jeden Zylinder zumindest ein Gaswechseleinlass- und ein Gaswechselauslassventil vorgesehen. Die Steuerzeit der Gaswechsetventile ist beispielsweise durch einen Nockenwellenversteller variierbar. Ein derartiger Nockenwellenversteller verstellt eine relative Winkellage einer Nockenwelle bezüglich einer Kurbelwelle.The invention relates to a combustion method for a four-stroke reciprocating internal combustion engine with a spark ignition, which is operable with a stoichiometric fuel-air mixture. For the change of charge, at least one gas exchange inlet valve and one gas exchange outlet valve are provided for each cylinder. The control time of the gas exchange valves can be varied, for example, by a camshaft adjuster. Such a camshaft adjuster displaces a relative angular position of a camshaft relative to a crankshaft.
Erfindungsgemäß wird bei einer Teillast der Brennkraftmaschine mit Hilfe einer Gaswechselventilunterschneidung zwischen 5% und 25% Restgas im Zylinder vor einem Arbeitsspiel zurückgehalten. Bei einer Gaswechselventilunterschneidung öffnet das Gaswechseleinlassventil erst, wenn das Gaswechselauslassventil vollständig geschlossen ist. In vorteilhafter Weise kann das erfindungsgemäße Brennverfahren von knapp über einer Leerlaufdrehzahl bis zu einer maximalen Drehzahl der Brennkraftmaschine eingesetzt werden. Hierbei kann der Kraftstoff auch direkt in einen Zylinder eingespritzt werden oder indirekt in ein Saugrohr.According to the invention, a partial load of the internal combustion engine is retained by means of a gas exchange valve undercutting between 5% and 25% residual gas in the cylinder before a working cycle. In a Gaswechselventilunterschneidung the gas exchange inlet valve opens only when the Gaswechselauslassventil is fully closed. Advantageously, the combustion method according to the invention can be used from just above an idling speed to a maximum speed of the internal combustion engine. Here, the fuel can also be injected directly into a cylinder or indirectly into a suction pipe.
Hieraus resultieren folgende Vorteile:
- 1. Geringere HC Rohemission (Kohlenwasserstoffrohemission), was zu einer Entlastung der Abgasnachbehandlung führt, d. h. zur Erfüllung der gleichen Emissionsstufe ist eine geringere Edelmetallbeladung des Katalysators ausreichend bzw. ist die Darstellung einer höheren Emissionsstufe mit gleicher Edelmetallbeladung möglich.
- 2. Günstigere Brennraumgestaltung, d. h. eine verringerte Klopf- bzw. Vorentflammungsneigung. Hierdurch sind höhere Aufladegrade bzw. eine Erhöhung des Verdichtungsverhältnisses möglich, was zu einer Verbesserung des Wirkungsgrades und einer Verringerung des Kraftstoffverbrauchs führt.
- 1. Lower HC raw emission (hydrocarbon raw emission), which leads to a relief of the exhaust aftertreatment, ie to fulfill the same emission level is a lower noble metal loading of the catalyst is sufficient or the representation of a higher emission stage with the same precious metal loading is possible.
- 2. Cheaper combustion chamber design, ie a reduced knock or Vorentflammungsneigung. As a result, higher Aufladegrade or an increase in the compression ratio is possible, resulting in an improvement in the efficiency and a reduction in fuel consumption.
Der Restgasanteil ist definiert als das Verhältnis der nach Abschluss eines Ladungswechsels in einem Frischgemisch enthaltenen Abgasmenge zur gesamten Zylinderladung.The residual gas content is defined as the ratio of the amount of exhaust gas contained in a fresh mixture after completion of a charge cycle to the total cylinder charge.
Besonders bevorzugt kommt ein hub- und/oder zeitvariabler Ventiltrieb beispielsweise die BMW Valvetronic auslassseitig (wie bei einem HCCI-Brennverfahren) zur Restgassteuerung im fremdgezündeten Betrieb im unteren und mittleren Lastbereich der Brennkraftmaschine zum Einsatz. Die Restgassteuerung wird durch Abgasrückhalten im Zylinder, d. h. durch eine Ventilunterscheidung statt einer Ventilüberschneidung dargestellt. Dies bedeutet, das Gaswechselauslassventil schließt deutlich vor einem Ladungswechsel-OT (oberer Totpunkt des Kolbens). Hierdurch werden die Verbrennungsgase nicht vollständig in den Abgastrakt ausgeschoben. Das Gaswechseleinlassventil öffnet typischerweise nach einem Ladungswechsel-OT (hieraus resultiert kein oder nur moderates Rückströmen von Restgas ins Saugrohr). Dies bedeutet, dass die Ladungswechselstrategie ähnlich wie beim HCCI-Brennverfahren ist, jedoch mit deutlich „moderateren” Steuerzeiten (kleinere Einlass-/Auslassspreizungen als beim HCCI-Brennverfahren) und Ventilhüben (größerer Gaswechselventilhub an Ein- und Auslassseite als beim HCCI-Brennverfahren), somit geringerer Restgasanteil als beim HCCI-Brennverfahren und Betrieb der Brennkraftmaschine mit Fremdzündung anstelle von Selbstzündung.Particularly preferably, a variable-stroke and / or time-varying valve drive, for example the BMW Valvetronic, is used on the outlet side (as in the case of a HCCI combustion process) for residual gas control in spark-ignited operation in the lower and middle load range of the internal combustion engine. The residual gas control is characterized by exhaust gas retention in the cylinder, i. H. represented by a valve distinction instead of a valve overlap. This means that the gas exchange outlet valve closes significantly before a charge exchange TDC (top dead center of the piston). As a result, the combustion gases are not fully ejected into the exhaust system. The gas exchange inlet valve typically opens after a charge exchange TDC (resulting in no or only moderate backflow of residual gas into the intake manifold). This means that the charge cycle strategy is similar to the HCCI combustion process, but with significantly "more moderate" timing (smaller intake / exhaust spreads than the HCCI combustion process) and valve strokes (larger gas swing valve lift on the intake and exhaust side than the HCCI combustion process), thus lower residual gas content than the HCCI combustion process and operation of the internal combustion engine with spark ignition instead of auto-ignition.
Lastabhängig unterschiedliche Restgasanteile lassen sich über die Verstellung der Auslassphase (beispielsweise über einen Nockenwellenversteller) und/oder Variation des Auslassgaswechselventilhubes erzeugen, eine zusätzliche Beimischung extern zurückgeführten Abgases (externe AGR, ggf. gekühlt) kann genutzt werden, um die Entdrosselung zu verbessern und die Verbrennungsgeschwindigkeit zu kontrollieren (z. B. zur Vermeidung von Klopfen).Depending on the load different residual gas components can be generated via the adjustment of the exhaust phase (for example via a camshaft adjuster) and / or variation of Auslassgaswechselventilhubes, an additional admixture externally recirculated exhaust gas (external EGR, possibly cooled) can be used to improve the Entdrosselung and the combustion rate to control (eg to avoid knocking).
Das erfindungsgemäße Brennverfahren ist prinzipiell auch mit anderen Gaswechselventilsteuerungen darstellbar, die mindestens eine einstufige Ventilhubreduktion am Auslass erlauben (z. B. Honda V-Tec bei Anwendung auslassseitig, Audi AVS etc.), sowie über eine auslassseitige Phasenverstellung verfügen.The combustion process according to the invention is in principle also with others Gas exchange valve controls can be displayed that allow at least one single-stage valve lift reduction at the outlet (eg Honda V-Tec when used on the exhaust side, Audi AVS, etc.) as well as an outlet-side phasing.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES 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 of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 10348137 A1 [0002] DE 10348137 A1 [0002]
- DE 102009014986 A1 [0003] DE 102009014986 A1 [0003]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102011078458A DE102011078458A1 (en) | 2011-06-30 | 2011-06-30 | Combustion method for four-stroke reciprocating internal combustion engine with spark ignition, involves operating internal combustion engine with stoichiometric fuel-air mixture, and changing load in cylinder of internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102011078458A DE102011078458A1 (en) | 2011-06-30 | 2011-06-30 | Combustion method for four-stroke reciprocating internal combustion engine with spark ignition, involves operating internal combustion engine with stoichiometric fuel-air mixture, and changing load in cylinder of internal combustion engine |
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DE102011078458A1 true DE102011078458A1 (en) | 2013-01-03 |
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DE102011078458A Withdrawn DE102011078458A1 (en) | 2011-06-30 | 2011-06-30 | Combustion method for four-stroke reciprocating internal combustion engine with spark ignition, involves operating internal combustion engine with stoichiometric fuel-air mixture, and changing load in cylinder of internal combustion engine |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014007153B4 (en) | 2013-05-15 | 2022-08-11 | Suzuki Motor Corp. | Control device for an internal combustion engine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10348137A1 (en) | 2003-10-16 | 2005-05-12 | Daimler Chrysler Ag | Method for operating an internal combustion engine |
EP1296043B1 (en) * | 2001-09-25 | 2006-02-15 | AVL List GmbH | Internal combustion engine |
EP1338776B1 (en) * | 2002-02-20 | 2006-05-03 | Ford Global Technologies, LLC | Four stroke spark ignition engine with separate variable camshafts and method therefor |
DE102006027571A1 (en) * | 2006-06-14 | 2007-12-20 | Robert Bosch Gmbh | Petrol engine transition method, involves adjusting operating parameter of output operating mode to specific value necessary for targeted operating mode in pre-controlling phase, and changing operating mode after phase to control parameter |
DE102009014986A1 (en) | 2008-04-01 | 2009-10-08 | Schaeffler Kg | Sleeve bearing for suspension strut of vehicle, comprises upper bearing element with upper bearing surface and lower bearing element with lower bearing surface |
DE102009014086A1 (en) * | 2009-03-23 | 2010-09-30 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine |
-
2011
- 2011-06-30 DE DE102011078458A patent/DE102011078458A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1296043B1 (en) * | 2001-09-25 | 2006-02-15 | AVL List GmbH | Internal combustion engine |
EP1338776B1 (en) * | 2002-02-20 | 2006-05-03 | Ford Global Technologies, LLC | Four stroke spark ignition engine with separate variable camshafts and method therefor |
DE10348137A1 (en) | 2003-10-16 | 2005-05-12 | Daimler Chrysler Ag | Method for operating an internal combustion engine |
DE102006027571A1 (en) * | 2006-06-14 | 2007-12-20 | Robert Bosch Gmbh | Petrol engine transition method, involves adjusting operating parameter of output operating mode to specific value necessary for targeted operating mode in pre-controlling phase, and changing operating mode after phase to control parameter |
DE102009014986A1 (en) | 2008-04-01 | 2009-10-08 | Schaeffler Kg | Sleeve bearing for suspension strut of vehicle, comprises upper bearing element with upper bearing surface and lower bearing element with lower bearing surface |
DE102009014086A1 (en) * | 2009-03-23 | 2010-09-30 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014007153B4 (en) | 2013-05-15 | 2022-08-11 | Suzuki Motor Corp. | Control device for an internal combustion engine |
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