DE102007031551B4 - Method for operating a hybrid vehicle and computer program for the method - Google Patents
Method for operating a hybrid vehicle and computer program for the method Download PDFInfo
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- DE102007031551B4 DE102007031551B4 DE102007031551.3A DE102007031551A DE102007031551B4 DE 102007031551 B4 DE102007031551 B4 DE 102007031551B4 DE 102007031551 A DE102007031551 A DE 102007031551A DE 102007031551 B4 DE102007031551 B4 DE 102007031551B4
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- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
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- B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold 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
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- F02D41/1446—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 exhaust temperatures
- F02D41/1447—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 exhaust temperatures with determination means using an estimation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0848—Circuits or control means specially adapted for starting of engines with means for detecting successful engine start, e.g. to stop starter actuation
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
- B60K2006/268—Electric drive motor starts the engine, i.e. used as starter motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/44—Drive Train control parameters related to combustion engines
- B60L2240/441—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0614—Position of fuel or air injector
- B60W2510/0619—Air-fuel ratio
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
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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
- F02D41/02—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
- F02D41/1454—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 oxygen content or concentration or the air-fuel ratio
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Hybrid Electric Vehicles (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Verfahren zum Betreiben eines Hybridfahrzeugs, das durch einen Verbrennungsmotor (VM) und durch wenigstens eine elektrische Maschine (EM) antreibbar ist, dadurch gekennzeichnet, dass aufgrund eines Lambda-Signals einer im Abgastrakt des Verbrennungsmotors (VM) angeordneten Lambda-Sonde (LS) auf einen aktiven Verbrennungsmotor (VM) geschlossen wird, wobei die Lambda-Sonde zusätzlich zur Drehzahlinformation des Verbrennungsmotors zur Erkennung eines aktiven Verbrennungsmotors (VM) und zur Erkennung des Endes der Startprozedur des Verbrennungsmotors (VM) ausgewertet wird. Method for operating a hybrid vehicle which is drivable by an internal combustion engine (VM) and by at least one electric machine (EM), characterized in that due to a lambda signal of a lambda sensor (LS) arranged in the exhaust tract of the internal combustion engine (VM) an active internal combustion engine (VM) is closed, wherein the lambda probe in addition to the rotational speed information of the internal combustion engine for detecting an active internal combustion engine (VM) and for detecting the end of the starting procedure of the internal combustion engine (VM) is evaluated.
Description
Stand der TechnikState of the art
Die Erfindung betrifft ein Verfahren zum Betreiben eines Hybridfahrzeugs nach der Gattung des unabhängigen Anspruchs 1.The invention relates to a method for operating a hybrid vehicle according to the preamble of independent claim 1.
Gegenstand der Erfindung sind auch ein Computerprogramm sowie ein Computerprogrammprodukt mit einem Programmcode, der auf einem maschinenlesbaren Träger gespeichert ist, zur Durchführung des Verfahrens.The invention also provides a computer program and a computer program product with a program code which is stored on a machine-readable carrier for carrying out the method.
Bei an sich bekannten Fahrzeugen erfolgt der Start des Verbrennungsmotors durch ein Hilfsaggregat, beispielsweise einen Anlasser oder einen Starter. Durch dieses Hilfsaggregat wird der Verbrennungsmotor auf eine Mindestdrehzahl, eine Mindeststartdrehzahl „hochgeschleppt“, um erste Zündungen des Kraftstoffluftgemisches durchzuführen.In known vehicles, the start of the internal combustion engine by an auxiliary unit, such as a starter or a starter. By this auxiliary unit, the internal combustion engine to a minimum speed, a minimum starting speed "dragged up" to perform first ignitions of the fuel air mixture.
Ab diesem Zeitpunkt ist das Hilfsaggregat nicht mehr erforderlich und wird im Falle eines Anlassers „abgeworfen“. Mithilfe der weiteren kontinuierlich folgenden Zündungen ist der Verbrennungsmotor in der Lage, sich auf seine erforderliche Leerlaufdrehzahl, die größer ist als die Mindestdrehzahl, zu bringen. Sobald der Verbrennungsmotor seine Leerlaufdrehzahl erreicht hat, läuft er selbsttätig. Dieser Vorgang wird Startprozedur genannt und stellt einen gesonderten Fall des verbrennungsmotorischen Betriebes dar. Diese Startprozedur erfordert unter anderem besondere Einspritzmengen und Zündzeitpunkte, um ein sicheres Starten des Verbrennungsmotors bei allen Witterungsverhältnissen zu ermöglichen. Nach Abschluss der Startprozedur geht der Verbrennungsmotor in einen „normalen“ verbrennungsmotorischen Betrieb, den sogenannten „aktiven Betrieb“ über. Die Erkennung des Endes der Startprozedur erfolgt nun im Wesentlichen durch eine Erkennung einer Überschreitung einer vorgebbaren Drehzahlschwelle, die höher ist als die Mindeststartdrehzahl des Verbrennungsmotors und niedriger als die Leerlaufdrehzahl des Verbrennungsmotors. Eine solche Erkennung ist ohne Weiteres möglich, da die Drehzahl des Verbrennungsmotors ohnehin für weitere motorische Steuerungszwecke erfasst wird.From this point on, the auxiliary unit is no longer required and is "dropped" in the case of a starter. With the aid of the further continuously following ignitions, the internal combustion engine is able to bring itself to its required idling speed, which is greater than the minimum speed. As soon as the internal combustion engine has reached its idling speed, it runs automatically. This procedure is called a startup procedure and represents a separate case of internal combustion engine operation. This startup procedure requires, among other things, special injection quantities and ignition times in order to enable reliable starting of the internal combustion engine in all weather conditions. After completion of the startup procedure, the internal combustion engine goes into a "normal" internal combustion engine operation, the so-called "active operation". The detection of the end of the starting procedure is now carried out essentially by detecting an exceeding of a predefinable speed threshold, which is higher than the minimum starting speed of the internal combustion engine and lower than the idling speed of the internal combustion engine. Such detection is readily possible because the speed of the engine is detected anyway for further engine control purposes.
Die
Die
Im Falle eines Hybridfahrzeuges, also eines Fahrzeuges, das sowohl von einem Verbrennungsmotor als auch von wenigstens einem Elektromotor angetrieben wird, beispielsweise in paralleler Bauweise, herrschen nun geänderte Verhältnisse. Ein Hilfsaggregat, wie oben beschrieben, kann in diesem Falle entfallen. Das „Hilfsaggregat“ wird vielmehr durch einen leistungsstarken Fahrmotor in Form einer elektrischen Maschine realisiert, die in der Lage ist, den Verbrennungsmotor sehr viel schneller und auf nahezu beliebige Drehzahlen hochzuschleppen und auf beliebigem Drehzahlniveau zu halten.In the case of a hybrid vehicle, that is to say a vehicle which is driven both by an internal combustion engine and by at least one electric motor, for example in a parallel construction, changed conditions now prevail. An auxiliary unit, as described above, can be omitted in this case. Rather, the "auxiliary unit" is realized by a powerful traction motor in the form of an electric machine, which is able to tow the engine much faster and at almost any speed and keep at any speed level.
Die
Hierbei kann nun beispielsweise die Situation entstehen, dass die Drehzahl des Verbrennungsmotors nicht schnell genug erfasst werden kann und/oder dass der Verbrennungsmotor seinen Leer- bzw. Selbstlauf nicht selbsttätig eingenommen hat. Es ist mit anderen Worten keine gesicherte Aussage dahingehend möglich, ob der Verbrennungsmotor selbsttätig läuft, also in seinen Normalbetrieb übergegangen ist bzw. übergehen kann, oder ob er noch vom Fahrmotor, in diesem Falle der elektrischen Maschine, mitgeschleppt wird.Here, for example, the situation may arise that the speed of the engine can not be detected quickly enough and / or that the engine has not occupied its empty or self-running automatically. In other words, it is not possible to make a reliable statement as to whether the internal combustion engine is running automatically, that is to say transitioning into its normal mode or whether it is still being carried along by the traction motor, in this case the electric machine.
Rein prinzipiell könnte nun die Erkennung eines „aktiven“ Verbrennungsmotors dadurch erfolgen, dass ein Vergleich der abgegebenen und aufgenommenen Momente des Verbrennungsmotors und der elektrischen Maschine vorgenommen wird. Ein nicht aktiver Verbrennungsmotor wird geschleppt und erzeugt im Wesentlichen durch seine Reib- und Kompressionsmomente ein Schleppmoment (Lastmoment), welches im angetriebenen Fahrzeug die elektrische Maschine zusätzlich zum Fahrzeugantriebsmoment aufbringen muss. Der Vergleich der Fahrzeugantriebsmomente oder des Differenzmoments bei einem „aktiven“ Verbrennungsmotor und bei einem „nicht aktiven“ Verbrennungsmotor zur Erkennung eines aktiven Verbrennungsmotors kann jedoch zu Fehlinterpretationen führen, z. B. wenn ein ungünstiges Trägheits- und/oder Leistungsverhältnis von Verbrennungsmotor zu elektrischer Maschine besteht, beispielsweise ein kleines Schleppmoment und eine niedrige Momentenauflösung der elektrischen Maschine und/oder wenn die elektrische Maschine weniger Moment zum Fahrzeugantrieb abgibt aufgrund besonderer Fahrsituationen, z. B. auf einer Gefällestrecke oder im Hängerbetrieb und/oder wenn Fahrpedaländerungen während der Startprozedur vorliegen und/oder wenn träge, rutschende Trennkupplungen, Getriebeschaltungen und dergleichen vorliegen und/oder wenn durch zu-/abschaltende Nebenaggregate aufgrund deren temperatur-/drehzahlabhängigen Verhaltens negative Einflüsse auftreten und/oder wenn aufgrund hoher Dynamik ungenaue Momentenangaben vorliegen.In principle, the detection of an "active" internal combustion engine could now take place in that a comparison of the emitted and recorded moments of the internal combustion engine and the electric machine is made. A non-active internal combustion engine is towed and generates essentially by its friction and compression moments a drag torque (load torque), which must apply the electric machine in addition to the vehicle drive torque in the driven vehicle. However, the comparison of the vehicle drive torques or the differential torque in an "active" internal combustion engine and in a "non-active" internal combustion engine for detecting an active internal combustion engine can lead to misinterpretation, eg. B. if an unfavorable inertia and / or power ratio of internal combustion engine to electric machine, for example, a small drag torque and a low torque resolution of the electric machine and / or if the electric machine gives less moment to the vehicle drive due to particular driving situations, eg. B. on a slope or in hanger operation and / or when accelerator pedal changes during the startup procedure are present and / or if there are sluggish, slipping disconnect couplings, transmission circuits and the like and / or negative influences occur due to their temperature / speed-dependent behavior and / or if due to high dynamics inaccurate torque information is present.
Der Erfindung liegt die Aufgabe zugrunde ein Verfahren zum Betreiben eines Hybridfahrzeuges bereitzustellen, bei dem die Erkennung des Endes der Startprozedur des Verbrennungsmotors verbessert ist.The invention has for its object a method for operating a hybrid vehicle to provide, in which the detection of the end of the starting procedure of the internal combustion engine is improved.
Offenbarung der ErfindungDisclosure of the invention
Vorteile der ErfindungAdvantages of the invention
Durch das erfindungsgemäße Verfahren mit den Merkmalen des unabhängigen Anspruchs 1 ist eine sehr präzise Erkennung eines „aktiven“ Verbrennungsmotors möglich. By the method according to the invention with the features of independent claim 1, a very precise detection of an "active" internal combustion engine is possible.
Die oben genannten Unsicherheiten werden durch das erfindungsgemäße Verfahren vollständig beseitigt. Zur Erkennung eines „aktiven“ Verbrennungsmotors wird die Lambda-Sonde zusätzlich zur Drehzahlinformation des Verbrennungsmotors ausgewertet. Hierdurch ist eine Erkennung eines „aktiven“ Verbrennungsmotors unabhängig von der Systemkonfiguration und der situativen Fahrsituation möglich.The above-mentioned uncertainties are completely eliminated by the method according to the invention. To detect an "active" internal combustion engine, the lambda probe is evaluated in addition to the speed information of the internal combustion engine. This makes it possible to detect an "active" internal combustion engine independently of the system configuration and the situational driving situation.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Ausgestaltungen und Verbesserungen des in dem unabhängigen Anspruch angegebenen Verfahrens möglich.The measures listed in the dependent claims advantageous refinements and improvements of the method specified in the independent claim are possible.
So wird auf einen aktiven Verbrennungsmotor bevorzugt dann geschlossen, wenn der Lambda-Wert des Lambda-Signals, welches die Lambda-Sonde ausgibt, größer oder gleich 0,9 und kleiner oder gleich 1,1 ist, insbesondere wird auf einen aktiven Verbrennungsmotor geschlossen, wenn der Lambda-Wert gleich 1 ist.Thus, an active combustion engine is preferably closed when the lambda value of the lambda signal which outputs the lambda probe is greater than or equal to 0.9 and less than or equal to 1.1, in particular, an active combustion engine is closed, when the lambda value is 1.
Die Erfassung des Lambda-Werts ist möglich, wenn die Lambda-Sonde eine vorgebbare Betriebstemperatur aufweist, bei der eine zuverlässige Messung des Lambda-Werts möglich ist. Insbesondere muss die Lambda-Sondentemperatur größer sein als eine sogenannte Light-off-Temperatur. Deshalb sieht eine bevorzugte Ausgestaltung des Verfahrens vor, die Temperatur der Lambda-Sonde zu bestimmen und eine Aussage über einen aktiven Verbrennungsmotor erst dann zu treffen, wenn die Temperatur der Lambda-Sonde oberhalb eines vorgebbaren Light-off-Temperaturwertes liegt.The detection of the lambda value is possible if the lambda probe has a predefinable operating temperature at which a reliable measurement of the lambda value is possible. In particular, the lambda probe temperature must be greater than a so-called light-off temperature. Therefore, a preferred embodiment of the method to determine the temperature of the lambda probe and to make a statement about an active engine only when the temperature of the lambda probe is above a predetermined light-off temperature value.
Das Erreichen der Light-off-Temperatur wird beispielsweise mithilfe eines Temperaturmodells festgestellt.The achievement of the light-off temperature is determined for example by means of a temperature model.
Wenn der vorgebbare Temperaturschwellenwert, der die Light-off-Temperatur repräsentiert, dagegen nicht überschritten wird, sieht eine Ausgestaltung des Verfahrens vor, Einspritzvorgänge und/oder Zündvorgänge des Verbrennungsmotors zu unterbinden und das Fahrzeug ausschließlich durch die wenigstens eine elektrische Maschine anzutreiben.On the other hand, if the predeterminable temperature threshold, which represents the light-off temperature, is not exceeded, an embodiment of the method provides for preventing injection processes and / or ignition processes of the internal combustion engine and driving the vehicle exclusively by the at least one electrical machine.
Bevorzugt ist vorgesehen, die Lambda-Sonde zum schnellen Erreichen der Light-off-Temperatur gezielt zu beheizen.It is preferably provided to specifically heat the lambda probe for rapid achievement of the light-off temperature.
Gemäß einer Ausgestaltung wird dabei der Lambda-Sonden-Heizbedarf bestimmt und die Heizung der Lambda-Sonde so angesteuert, dass die Temperatur der Lambda-Sonde größer ist als die Light-off-Temperatur. Diese Ansteuerung erfolgt dabei bevorzugt in allen Betriebszuständen des Verbrennungsmotors, sodass sichergestellt ist, dass mittels der Lambda-Sonde zuverlässige Aussagen über den Lambda-Wert getroffen werden können.According to one embodiment, the lambda probe heating demand is determined and the heating of the lambda probe is controlled so that the temperature of the lambda probe is greater than the light-off temperature. This control is preferably carried out in all operating states of the internal combustion engine, so that it is ensured that reliable statements about the lambda value can be made by means of the lambda sensor.
Kurze Beschreibung der ZeichnungShort description of the drawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. In der Figur ist schematisch ein Hybridantrieb für ein Fahrzeug dargestellt, bei dem das erfindungsgemäße Verfahren zum Einsatz kommt.An embodiment of the invention is illustrated in the drawing and explained in more detail in the following description. In the figure, a hybrid drive for a vehicle is shown schematically, in which the inventive method is used.
Ausführungsformen der ErfindungEmbodiments of the invention
Ein Hybridantrieb für ein Fahrzeug, beispielhaft dargestellt in der Figur, umfasst einen Verbrennungsmotor
Sowohl die erste elektrische Maschine EM, die Trennkupplung
Im Abgastrakt A des Verbrennungsmotors
Im Falle eines Hybridfahrzeugs kann der Verbrennungsmotor bei einer geschlossenen Trennkupplung
Grundidee der vorliegenden Erfindung ist es deshalb, die Erkennung eines „aktiven“ Verbrennungsmotors, d. h. eines Verbrennungsmotors, der in seinen Normalbetrieb übergegangen ist, durch Erfassung des Lambda-Signals mittels der Lambda-Sonde
Dem liegt die Erkenntnis zugrunde, dass eine Lambda-Sonde LS, deren Temperatur größer ist als die sogenannte Light-off-Temperatur, d. h. größer ist als eine erforderliche Betriebstemperatur, sehr schnell ein geeignetes Signal zur Erkennung eines aktiven Verbrennungsmotors
Eine Ausgestaltung der Erfindung sieht vor, die Erkennung eines aktiven Verbrennungsmotors
Gleichzeitig wird dabei die Drehzahl n des Verbrennungsmotors VM erfasst und in dem Steuergerät
Es können nun jedoch Betriebszustände auftreten, in denen die Lambda-Sondentemperatur unterhalb der sogenannten Light-off-Temperatur liegt. In diesen Situationen, die beispielsweise im Falle eines Erst- oder Kaltstarts des Verbrennungsmotors
Das Erreichen der Light-off-Temperatur kann beispielsweise mithilfe an sich bekannter Temperaturmodelle oder durch ein entsprechendes, durch die Lambda-Sonde
Eine weitere Ausgestaltung des Verfahrens sieht vor, die Lambda-Sonde
Ferner kann eine stetige Ermittlung des aktuellen Heizbedarfs der Lambda-Sonde
Darüber hinaus können Betriebszustände des Verbrennungsmotors
Wenn es die Situation zulässt und falls es sich zur Beseitigung der störenden Zustände als vorteilhaft erweist, den Verbrennungsmotor
Nachfolgend wird eine beispielhafte Abfolge einer Startprozedur des Verbrennungsmotors
In einem ersten Schritt erfolgt die Einschaltung der Zündung.In a first step, the ignition is switched on.
In einem zweiten Schritt erfolgt eine Initialisierung eines Temperaturmodells mit der Umgebungstemperatur. Es erfolgt eine Steuerung/Regelung der Temperatur der Lambda-Sonde
In diesem Zustand kann das Fahrzeug nur elektrisch mit einer offenen Trennkupplung betrieben werden (dritter Ablaufschritt).In this state, the vehicle can only be electrically operated with an open disconnect clutch (third step).
In einem vierten Schritt, in dem der Lambda-Wert sicher zur Verfügung steht, was beispielsweise durch das Temperaturmodell oder das Lambda-Signal erfasst wird, wird ein Start-Freigabesignal des Verbrennungsmotors
In einem fünften Schritt, in dem der Verbrennungsmotor
Die Lambda-Wert-Auswertung zur Erkennung eines aktiven Verbrennungsmotors
Claims (12)
Priority Applications (2)
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DE102007031551.3A DE102007031551B4 (en) | 2007-07-06 | 2007-07-06 | Method for operating a hybrid vehicle and computer program for the method |
PCT/EP2008/057695 WO2009007209A2 (en) | 2007-07-06 | 2008-06-18 | Method for operating a hybrid vehicle |
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DE102007031551.3A DE102007031551B4 (en) | 2007-07-06 | 2007-07-06 | Method for operating a hybrid vehicle and computer program for the method |
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DE102010062261A1 (en) | 2010-12-01 | 2012-06-06 | Robert Bosch Gmbh | Method and control device for operating a motor vehicle |
Citations (3)
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DE4401806A1 (en) * | 1993-02-03 | 1994-08-04 | Volkswagen Ag | Functional testing of cut=out esp. on vehicular fuel-injected IC engine |
DE10160984A1 (en) * | 2000-12-05 | 2002-06-27 | Ford Motor Co | Procedure for recording engine readiness and vehicle with hybrid drive |
EP1223326A2 (en) * | 2001-01-11 | 2002-07-17 | Volkswagen Aktiengesellschaft | Method for controlling the injection amount during starting and for assessing fuel quality |
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DE10151680A1 (en) * | 2001-10-19 | 2003-05-08 | Bosch Gmbh Robert | Method and device for determining the end of a starting process of an internal combustion engine |
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2007
- 2007-07-06 DE DE102007031551.3A patent/DE102007031551B4/en not_active Expired - Fee Related
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE4401806A1 (en) * | 1993-02-03 | 1994-08-04 | Volkswagen Ag | Functional testing of cut=out esp. on vehicular fuel-injected IC engine |
DE10160984A1 (en) * | 2000-12-05 | 2002-06-27 | Ford Motor Co | Procedure for recording engine readiness and vehicle with hybrid drive |
EP1223326A2 (en) * | 2001-01-11 | 2002-07-17 | Volkswagen Aktiengesellschaft | Method for controlling the injection amount during starting and for assessing fuel quality |
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