DE102016206856A1 - Method and control device for operating a gas engine - Google Patents
Method and control device for operating a gas engine Download PDFInfo
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- DE102016206856A1 DE102016206856A1 DE102016206856.3A DE102016206856A DE102016206856A1 DE 102016206856 A1 DE102016206856 A1 DE 102016206856A1 DE 102016206856 A DE102016206856 A DE 102016206856A DE 102016206856 A1 DE102016206856 A1 DE 102016206856A1
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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
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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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
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- 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
- F02B19/00—Engines characterised by precombustion chambers
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- 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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
- F02B19/1019—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber
- F02B19/1023—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber pre-combustion chamber and cylinder being fed with fuel-air mixture(s)
- F02B19/1028—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber pre-combustion chamber and cylinder being fed with fuel-air mixture(s) pre-combustion chamber and cylinder having both intake ports or valves, e.g. HONDS CVCC
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- 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
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
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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
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
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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]
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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]
- F02D41/006—Controlling exhaust gas recirculation [EGR] using internal EGR
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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]
- F02D41/0065—Specific aspects of external EGR control
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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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
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- 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
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- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust Gas After Treatment (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Verfahren zum Betreiben eines Gasmotors (10) mit einem Abgaskatalysator (13) und mit einer Abgasrückführung (12), wobei der Gasmotor (10) Zylinder (11) aufweist, die eine Hauptbrennkammer (14) und eine Vorbrennkammer (15) aufweisen, wobei die Zylinder (11) verlassendes Abgas (23) über den Abgaskatalysator (13) leitbar ist, und wobei ein Teil des die Zylinder verlassenden Abgases (23) über die Abgasrückführung (12) in Richtung auf die Zylinder (11) führbar ist. In einer ersten Betriebsstrategie wird der Gasmotor (10) derart betrieben wird, dass über die Abgasrückführung (12) geleitetes Abgas (23) in Richtung auf die Hauptbrennkammern (14) der Zylinder geführt wird, sodass das den Hauptbrennkammern zuzuführende Gas/Luft-Gemisch (18) Abgas enthält; dass über die Abgasrückführung geleitetes Abgas (23) nicht in Richtung auf die Vorbrennkammern (15) der Zylinder geführt wird, sodass das den Vorbrennkammern zuzuführende Gas/Luft-Gemisch (19) kein Abgas enthält; dass der Gasanteil des den Hauptbrennkammern (14) der Zylinder (11) zuzuführenden Gas/Luft-Gemischs (18) derart geregelt wird, dass die Verbrennung in den Zylindern bei einem stöchiometrischen Verbrennungsluftverhältnis bzw. einem Lambdawert von 1 erfolgt.A method of operating a gas engine (10) having an exhaust gas catalyst (13) and an exhaust gas recirculation (12), the gas engine (10) having cylinders (11) having a main combustion chamber (14) and a pre-combustion chamber (15) Cylinder (11) leaving the exhaust gas (23) via the catalytic converter (13) is conductive, and wherein a portion of the cylinder leaving the exhaust gas (23) via the exhaust gas recirculation (12) in the direction of the cylinder (11) is feasible. In a first operating strategy, the gas engine (10) is operated in such a way that exhaust gas (23) conducted via the exhaust gas recirculation (12) is guided in the direction of the main combustion chambers (14) of the cylinders, so that the gas / air mixture to be supplied to the main combustion chambers ( 18) contains exhaust gas; that via the exhaust gas recirculation led exhaust gas (23) is not guided in the direction of the Vorbrennkammern (15) of the cylinder, so that the pre-combustion chambers to be supplied gas / air mixture (19) contains no exhaust gas; in that the gas portion of the gas / air mixture (18) to be supplied to the main combustion chambers (14) of the cylinders (11) is controlled in such a way that the combustion takes place in the cylinders at a stoichiometric combustion air ratio or a lambda value of 1.
Description
Die Erfindung betrifft ein Verfahren zum Betreiben eines Gasmotors und eine Steuerungseinrichtung zur Durchführung des Verfahrens. The invention relates to a method for operating a gas engine and a control device for carrying out the method.
Aus der Praxis sind Gasmotoren mit einem Abgaskatalysator und einer Abgasrückführung bekannt, wobei Abgas, welches bei der Verbrennung eines Gas/Luft-Gemischs in Zylindern des Gasmotors entsteht, über den Abgaskatalysator leitbar ist, und wobei ein Teil des die Zylinder verlassenden Abgases über die Abgasrückführung in Richtung auf die Zylinder zurückführbar bzw. mit einem den Zylindern zuzuführenden Gas/Luft-Gemisch mischbar ist. From practice gas engines with an exhaust gas catalyst and an exhaust gas recirculation are known, wherein exhaust gas, which is produced in the combustion of a gas / air mixture in cylinders of the gas engine, via the catalytic converter can be conducted, and wherein a portion of the cylinder leaving the exhaust gas via the exhaust gas recirculation in the direction of the cylinder traceable or miscible with a cylinder to be supplied to the gas / air mixture.
Ferner sind aus der Praxis Gasmotoren nach dem Magerbrennverfahren (überstöchiometrisch) bekannt, deren Zylinder entweder ausschließlich eine Hauptbrennkammer oder zusätzlich zu einer Hauptbrennkammer eine Vorbrennkammer aufweisen, wobei bei Gasmotoren, deren Zylinder eine Hauptbrennkammer und eine Vorbrennkammer aufweisen, in der Vorbrennkammer ein Gas/Luft-Gemisch gezündet wird, welches das der jeweiligen Hauptbrennkammer des jeweiligen Zylinders zugeführte Gas/Luft-Gemisch entzündet. Besonders vorteilhaft ist dieses Verfahren, wenn der Vorbrennkammer oder Vorkammer zusätzlich Kraftstoff zugeführt wird. Man spricht in diesem Fall von gespülter Vorkammer. Der Vorkammer wird hierbei lediglich Kraftstoff (i.d.R. Gas) zugeführt. Der zur Verbrennung notwendige Sauerstoff strömt während der Kompressionsphase über die Überströmbohrungen der Vorkammer aus dem Hauptbrennraum in die Vorkammer. In diesem Fall entspricht die Zusammensetzung der überströmenden Masse der des Hauptbrennraumes. Der Vorteil des gespülten Vorkammerbrennverfahrens besteht darin, dass der Brennraum somit in einen fetteren Bereich (Vorkammer) und in einen mageren Bereich unterteilt wird. Durch den fetteren Bereich in der Vorkammer entsteht eine schnelle Entflammung, welche mittels in den Hauptbrennraum übertretenden energiereichen Fackelstrahlen diesen mageren Hauptbrennraum schnell entflammt. Da der Hauptbrennraum sehr mager ist, ist entstehen nur geringe Stickoxidemissionen und es besteht nur eine geringe Klopfneigung, wodurch hohe Leistungsdichten und hohe Wirkungsgrade ermöglicht werden. In Summe wird der Motor mager betrieben, wodurch eine katalytische Abgasreinigung nach dem 3-Wege-Prinzip nicht möglich ist. Furthermore, gas engines according to the lean burn process (superstoichiometric) are known, whose cylinders either exclusively have a main combustion chamber or in addition to a main combustion chamber a pre-combustion chamber, wherein in gas engines whose cylinders have a main combustion chamber and a pre-combustion chamber, in the pre-combustion chamber, a gas / air Mixture is ignited, which ignites the respective main combustion chamber of the respective cylinder supplied gas / air mixture. This method is particularly advantageous if additional fuel is supplied to the pre-combustion chamber or prechamber. In this case one speaks of flushed antechamber. The prechamber is supplied with fuel (i.d.R. During the compression phase, the oxygen required for combustion flows via the overflow holes of the prechamber from the main combustion chamber into the prechamber. In this case, the composition of the overflowing mass corresponds to that of the main combustion chamber. The advantage of the purged pre-chamber combustion method is that the combustion chamber is thus subdivided into a richer area (pre-chamber) and into a lean area. Due to the richer area in the antechamber, a rapid ignition occurs, which quickly ignites this lean main combustion chamber by means of high-energy torchbeams passing into the main combustion chamber. Since the main combustion chamber is very lean, only small nitrogen oxide emissions are produced and there is only a slight tendency to knock, which makes high power densities and high efficiencies possible. In total, the engine is operated lean, whereby a catalytic exhaust gas purification according to the 3-way principle is not possible.
Es besteht Bedarf an einem Verfahren, mit Hilfe dessen ein Gasmotor, dessen Zylinder eine Hauptbrennkammer und eine Vorbrennkammer aufweisen, und der einen Abgaskatalysator und eine Abgasrückführung aufweist, bei hohem Wirkungsgrad des Motors und geringer Klopfneigung sowie effektiver Abgasreinigung im Bereich des Abgaskatalysators betrieben werden kann. There is a need for a method by which a gas engine, the cylinder of which has a main combustion chamber and a pre-combustion chamber and which has an exhaust gas catalyst and exhaust gas recirculation, can be operated with high engine efficiency and low tendency to knock as well as effective exhaust gas purification in the region of the catalytic converter.
Hiervon ausgehend liegt der Erfindung die Aufgabe zu Grunde, ein neuartiges Verfahren und eine Steuerungseinrichtung zum Betreiben eines Gasmotors zu schaffen. On this basis, the invention is based on the object to provide a novel method and a control device for operating a gas engine.
Diese Aufgabe wird durch ein Verfahren gemäß Anspruch 1 gelöst. Erfindungsgemäß wird in einer ersten Betriebsstrategie der Motor derart betrieben wird, dass über die Abgasrückführung geleitetes Abgas in Richtung auf die Hauptbrennkammern der Zylinder geführt wird, sodass das den Hauptbrennkammern zuzuführende Gas/Luft-Gemisch Abgas enthält; dass über die Abgasrückführung geleitetes Abgas nicht in Richtung auf die Vorbrennkammern der Zylinder geführt wird, sodass das den Vorbrennkammern zuzuführende Gas/Luft-Gemisch kein Abgas enthält; und dass der Gasanteil des den Hauptbrennkammern der Zylinder zuzuführenden Gas/Luft-Gemischs derart geregelt wird, dass die Verbrennung in den Zylindern in Summe bei einem stöchiometrischen Verbrennungsluftverhältnis bzw. einem Lambdawert von 1 erfolgt. This object is achieved by a method according to claim 1. According to the invention, in a first operating strategy, the engine is operated such that exhaust gas conducted via the exhaust gas recirculation is guided in the direction of the main combustion chambers of the cylinders, so that the gas / air mixture to be supplied to the main combustion chambers contains exhaust gas; that exhaust gas conducted via the exhaust gas recirculation is not guided in the direction of the preburner chambers of the cylinders, so that the gas / air mixture to be supplied to the precombustion chambers does not contain exhaust gas; and that the gas content of the gas / air mixture to be supplied to the main combustion chambers of the cylinders is controlled so that the combustion in the cylinders takes place in total at a stoichiometric combustion air ratio or a lambda value of 1.
Das den Hauptbrennkammern der Zylinder zugeführte Gas/Luft-Gemisch ist in der ersten Betriebsstrategie des Motors mit Abgas gemischt. Das den Vorbrennkammern der Zylinder zuzuführende Gas/Luft-Gemisch ist hingegen nicht mit Abgas gemischt. Es ist eine effektive Zündung des Gas/Luft-Gemischs in den Vorbrennkammern der Zylinder sowie in den Hauptbrennkammern der Zylinder möglich. Vorzugsweise wird die Gas-Luftmischung unter hohem Druck in der Kompressionsphase in die Vorkammer eingedüst, wodurch das aus dem Hauptbrennraum einströmende Gemisch mit rückgeführtem Abgas verdrängt wird und somit die Entflammung in der Vorkammer weiter optimiert wird. The gas / air mixture supplied to the main combustion chambers of the cylinders is mixed with exhaust gas in the first operating strategy of the engine. The pre-combustion chambers of the cylinder to be supplied gas / air mixture, however, is not mixed with exhaust gas. Effective ignition of the gas / air mixture in the preburner chambers of the cylinders and in the main combustion chambers of the cylinders is possible. Preferably, the gas-air mixture is injected under high pressure in the compression phase in the pre-chamber, whereby the flowing in from the main combustion chamber mixture is displaced with recycled exhaust gas and thus the flame in the pre-chamber is further optimized.
Durch die Spülung der Vorbrennkammern mit einem abgasfreien Gas/Luft-Gemisch kann ein Maximum an Zündenergie und kinetischer Energie in die Hauptbrennkammern der Zylinder übertragen werden. Durch das Abgas des den Hauptbrennkammern der Zylinder zuzuführenden Gas/Luft-Gemischs werden die Hauptbrennkammern der Zylinder inertisiert, wodurch sich geringere Verbrennungstemperaturen, eine geringere Klopfneigung und geringere Bauteiltemperaturen ergeben. By flushing the precombustion chambers with an exhaust-free gas / air mixture, a maximum of ignition energy and kinetic energy can be transferred to the main combustion chambers of the cylinders. By the exhaust gas of the main combustion chambers of the cylinder to be supplied gas / air mixture, the main combustion chambers of the cylinder are rendered inert, resulting in lower combustion temperatures, a lower tendency to knock and lower component temperatures.
Der die Verbrennung verlangsamende Effekt des Abgasanteils des Gas/Luft-Gemischs in den Hauptbrennkammern der Zylinder kann durch das Gas/Luft-Gemisch in den Vorbrennkammern der Zylinder kompensiert werden, nämlich dadurch, dass über das Gas/Luft-Gemisch der Vorbrennkammern in die Hauptbrennkammern maximale Zündenergie und maximale kinetische Energie eingebracht werden können. The combustion slowing effect of the exhaust gas portion of the gas / air mixture in the main combustion chambers of the cylinder can be compensated by the gas / air mixture in the prebake chambers of the cylinder, namely the fact that on the gas / air mixture of Vorbrennkammern in the main combustion chambers maximum ignition energy and maximum kinetic energy can be introduced.
Dadurch, dass der Gasanteil des den Hauptbrennkammern der Zylinder zuzuführenden Gas/Luft-Gemischs derart geregelt wird, dass in den Zylindern ein Lambda-Wert von 1 vorliegt und demnach dieselben ein stöchiometrisches Verbrennungsluftverhältnis aufweisen, kann der den Gasmotor nachgelagerte Abgaskatalysator, bei welchem es sich vorzugsweise um einen 3-Wege-Abgaskatalysator handelt, mit maximaler Wirksamkeit betrieben werden. Somit können die Vorteile des vorgenannten Magerbrennverfahrens mit gasgespülter Vorkammer (niedrige Bauteil- und Abgastemperatur bei hohem Wirkungsgrad durch geringe Klopfneigung) mit den Vorteilen eines Lambda 1-Brennverfahrens mit 3-Wege-Katalysator (niedrigste Emissionen) verknüpft werden. Characterized in that the gas content of the main combustion chambers of the cylinder to be supplied gas / air mixture is controlled so that in the cylinders has a lambda value of 1 and therefore have a stoichiometric combustion air ratio, the gas engine downstream catalytic converter, in which it preferably is a 3-way catalytic converter, are operated with maximum efficiency. Thus, the advantages of the aforementioned lean burn process with gas-rinsed prechamber (low component and exhaust gas temperature at high efficiency by low tendency to knock) with the advantages of a Lambda 1 combustion process with 3-way catalyst (lowest emissions) can be linked.
Nach einer vorteilhaften Weiterbildung der Erfindung weist das den Vorbrennkammern der Zylinder zuzuführenden Gas/Luft-Gemisch einen Lambdawert zwischen 0,8 und 1,1 auf, wobei der Gasanteil des den Hauptbrennkammern der Zylinder zuzuführenden Gas/Luft-Gemischs derart geregelt wird, dass in den Zylindern bilanziert über Hauptbrennraum und Vorkammer das Gas/Luft-Gemisch ein stöchiometrisches Verbrennungsluftverhältnis bzw. einen Lambdawert von 1 aufweist. Diese Weiterbildung der Erfindung erlaubt einen besonders vorteilhaften Betrieb eines Gasmotors bei geringer Klopfneigung, hohem Motorwirkungsgrad und hoher Effektivität der Abgasreinigung in dem Gasmotor nachgelagerten Abgaskatalysator. According to an advantageous embodiment of the invention, the pre-combustion chambers of the cylinder to be supplied gas / air mixture has a lambda value between 0.8 and 1.1, wherein the gas content of the main combustion chambers of the cylinder to be supplied gas / air mixture is controlled such that in Having the cylinders balanced via the main combustion chamber and the pre-chamber, the gas / air mixture has a stoichiometric combustion air ratio or a lambda value of 1. This development of the invention allows a particularly advantageous operation of a gas engine with low tendency to knock, high engine efficiency and high efficiency of the exhaust gas purification in the gas engine downstream catalytic converter.
Nach einer vorteilhaften Weiterbildung wird in einer zweiten Betriebsstrategie der Gasanteil des den Hauptbrennkammern der Zylinder zuzuführenden Gas/Luft-Gemischs derart geregelt, dass in den Zylindern das Gas/Luft-Gemisch einen Lambdawert größer 1 aufweist. Hierbei wird vorzugsweise die Abgasrückführung gegenüber der ersten Betriebsstrategie reduziert, um weniger Abgas mit dem den Hauptbrennkammern der Zylinder zuzuführenden Gas/Luft-Gemisch zu mischen. According to an advantageous development, in a second operating strategy, the gas fraction of the gas / air mixture to be supplied to the main combustion chambers of the cylinder is controlled such that the gas / air mixture has a lambda value greater than 1 in the cylinders. In this case, the exhaust gas recirculation is preferably reduced compared with the first operating strategy in order to mix less exhaust gas with the gas / air mixture to be supplied to the main combustion chambers of the cylinders.
Die zweite Betriebsstrategie ist insbesondere dann von Vorteil, wenn der Gasmotor mit schwankenden Gasqualitäten betrieben werden soll. Es können hierbei bezüglich Methanzahl schwankende Gasqualitäten ausgeregelt werden. Ferner ist die zweite Betriebsstrategie von Vorteil, wenn insbesondere bei mobilem Einsatz des Gasmotors sich Emissionsvorschriften ergeben, bei denen durch den Betriebsstrategiewechsel sich für den Kunden Kostenvorteile ergeben. The second operating strategy is particularly advantageous if the gas engine is to be operated with fluctuating gas qualities. It can be adjusted here in terms of methane number fluctuating gas qualities. Furthermore, the second operating strategy is advantageous if, in particular in the case of mobile use of the gas engine, emission regulations arise in which the operating strategy change results in cost advantages for the customer.
Die Steuerungseinrichtung zur Durchführung des Verfahrens ist in Anspruch 9 definiert. The control device for carrying out the method is defined in claim 9.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt: Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
Die Erfindung betrifft ein Verfahren zum Betreiben eines Gasmotors und eine Steuerungseinrichtung zur Durchführung des Verfahrens. The invention relates to a method for operating a gas engine and a control device for carrying out the method.
Jeder Zylinder
Den Hauptbrennkammern
Wie bereits ausgeführt, umfasst der Gasmotor
Über die Abgasrückführung
Um einen solchen Gasmotor
In der erfindungsgemäßen Betriebsstrategie wird über die Abgasrückführung
In der ersten Betriebsstrategie wird der über die Abgasrückführung
Der Gasanteil des den Hauptbrennkammern
Über die Beimischung des vorzugsweise gekühlten Abgases
Vorzugsweise weist das den Vorbrennkammern
In einer zweiten Betriebsstrategie des Gasmotors
Schwankende Gasqualtäten können insbesondere über eine Ansteuerung bzw. Verstellung der Öffnungsstellung des Abgasrückführventils
Die Erfindung kann bei abgasaufgeladenen und nicht abgasaufgeladenen Gasmotoren zum Einsatz kommen. Die Abgasaufladung kann einstufig oder mehrstufig, insbesondere zweistufig, erfolgen. Die Abgasrückführung
Die Erfindung betrifft weiterhin die Steuerungseinrichtung
Die Erfindung kommt vorzugsweise bei Gasmotoren zum Einsatz, die auf Schiffen betrieben werden. The invention is preferably used in gas engines operated on ships.
Claims (9)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016206856.3A DE102016206856A1 (en) | 2016-04-22 | 2016-04-22 | Method and control device for operating a gas engine |
ATA149/2017A AT518574B1 (en) | 2016-04-22 | 2017-04-10 | Method and control device for operating a gas engine |
KR1020170049617A KR20170121066A (en) | 2016-04-22 | 2017-04-18 | Method and control device for operating a gas engine |
CN201710265256.9A CN107304726A (en) | 2016-04-22 | 2017-04-21 | Method and control device for operating gas engine |
NO20170671A NO20170671A1 (en) | 2016-04-22 | 2017-04-21 | Method and control device for operating a gas engine |
FI20175362A FI130055B (en) | 2016-04-22 | 2017-04-21 | Method and control device for operating a gas engine |
JP2017084203A JP2017214922A (en) | 2016-04-22 | 2017-04-21 | Method and control device for operating gas engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102016206856.3A DE102016206856A1 (en) | 2016-04-22 | 2016-04-22 | Method and control device for operating a gas engine |
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DE102016206856A1 true DE102016206856A1 (en) | 2017-10-26 |
Family
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DE102016206856.3A Pending DE102016206856A1 (en) | 2016-04-22 | 2016-04-22 | Method and control device for operating a gas engine |
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JP (1) | JP2017214922A (en) |
KR (1) | KR20170121066A (en) |
CN (1) | CN107304726A (en) |
AT (1) | AT518574B1 (en) |
DE (1) | DE102016206856A1 (en) |
FI (1) | FI130055B (en) |
NO (1) | NO20170671A1 (en) |
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CN113006927B (en) * | 2021-03-18 | 2021-12-21 | 吉林大学 | Thermal jet mechanism of lean burn engine and combustion system thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3506217A1 (en) * | 1985-02-22 | 1986-08-28 | FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen | COMBUSTION METHOD FOR INTERNAL COMBUSTION ENGINES |
AT512532B1 (en) * | 2012-09-26 | 2013-09-15 | Ge Jenbacher Gmbh & Co Og | Pre-chamber system for an internal combustion engine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5922247Y2 (en) * | 1978-12-06 | 1984-07-03 | 日産自動車株式会社 | spark ignition internal combustion engine |
JPH08254121A (en) * | 1995-03-20 | 1996-10-01 | Yanmar Diesel Engine Co Ltd | Spark ignition type internal combustion engine |
JP2002357138A (en) * | 2001-05-31 | 2002-12-13 | Isuzu Motors Ltd | Auxiliary chamber type gas engine with control valve and operation method therefor |
CA2406267C (en) * | 2002-10-02 | 2013-01-08 | Westport Research Inc. | Exhaust gas recirculation methods and apparatus for reducing nox emissions from internal combustion engines |
DE102008015744B4 (en) * | 2008-03-26 | 2010-04-01 | Man Diesel Se | Internal combustion engine and method for operating the same |
DE102011100677A1 (en) * | 2011-05-06 | 2012-11-08 | Daimler Ag | Operating method for a motor vehicle diesel engine |
-
2016
- 2016-04-22 DE DE102016206856.3A patent/DE102016206856A1/en active Pending
-
2017
- 2017-04-10 AT ATA149/2017A patent/AT518574B1/en active
- 2017-04-18 KR KR1020170049617A patent/KR20170121066A/en not_active Application Discontinuation
- 2017-04-21 FI FI20175362A patent/FI130055B/en active IP Right Grant
- 2017-04-21 NO NO20170671A patent/NO20170671A1/en unknown
- 2017-04-21 JP JP2017084203A patent/JP2017214922A/en active Pending
- 2017-04-21 CN CN201710265256.9A patent/CN107304726A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3506217A1 (en) * | 1985-02-22 | 1986-08-28 | FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen | COMBUSTION METHOD FOR INTERNAL COMBUSTION ENGINES |
AT512532B1 (en) * | 2012-09-26 | 2013-09-15 | Ge Jenbacher Gmbh & Co Og | Pre-chamber system for an internal combustion engine |
Also Published As
Publication number | Publication date |
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AT518574B1 (en) | 2018-09-15 |
CN107304726A (en) | 2017-10-31 |
FI130055B (en) | 2023-01-13 |
KR20170121066A (en) | 2017-11-01 |
AT518574A3 (en) | 2018-02-15 |
AT518574A2 (en) | 2017-11-15 |
FI20175362A (en) | 2017-10-23 |
JP2017214922A (en) | 2017-12-07 |
NO20170671A1 (en) | 2017-10-23 |
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