DE102014010227A1 - Method for starting an internal combustion engine in a hybrid powertrain - Google Patents
Method for starting an internal combustion engine in a hybrid powertrain Download PDFInfo
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- DE102014010227A1 DE102014010227A1 DE102014010227.0A DE102014010227A DE102014010227A1 DE 102014010227 A1 DE102014010227 A1 DE 102014010227A1 DE 102014010227 A DE102014010227 A DE 102014010227A DE 102014010227 A1 DE102014010227 A1 DE 102014010227A1
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K6/38—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 driveline clutches
- B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/54—Transmission for changing ratio
- B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
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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
- 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
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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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
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
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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
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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
- F02N5/00—Starting apparatus having mechanical power storage
- F02N5/04—Starting apparatus having mechanical power storage of inertia type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K6/42—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 the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
- B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/027—Clutch torque
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
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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
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
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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)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zum Start einer Brennkraftmaschine (10) in einem Hybridantriebsstrang (12), in dem ausgehend von einem rein elektromotorischen Betrieb die Brennkraftmaschine (10) durch eine Kombination von einem Impulsstart, bei dem ein Elektromotor (14) mit einer überhöhten Drehzahl betrieben wird, und einem Schleppstart, bei dem der Elektromotor (14) mit einem erhöhten Drehmoment betrieben wird, gestartet wird.The invention relates to a method for starting an internal combustion engine (10) in a hybrid drive train (12), starting from a purely electromotive operation, the internal combustion engine (10) by a combination of a pulse start, in which an electric motor (14) with an excessive speed is operated, and a tow start, in which the electric motor (14) is operated with an increased torque is started.
Description
Die Erfindung betrifft ein Verfahren zum Start einer Brennkraftmaschine in einem Hybridantriebsstrang.The invention relates to a method for starting an internal combustion engine in a hybrid drive train.
Aus der
Der Erfindung liegt insbesondere die Aufgabe zugrunde, einen besonders komfortablen und schnellen Start einer Brennkraftmaschine aus einem elektromotorischen Betrieb heraus zu erreichen. Die Aufgabe wird durch ein erfindungsgemäßes Verfahren entsprechend dem Anspruch 1 gelöst. Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.The invention is in particular the object of achieving a particularly comfortable and quick start of an internal combustion engine from an electromotive operation out. The object is achieved by an inventive method according to claim 1. Further developments of the invention will become apparent from the dependent claims.
Es wird ein Verfahren zum Start einer Brennkraftmaschine in einem Hybridantriebsstrang für ein Kraftfahrzeug vorgeschlagen, wobei der Hybridantriebsstrang eine Brennkraftmaschine und einen Elektromotor als Antriebsmaschinen aufweist, in dem ausgehend von einem rein elektromotorischen Betrieb die Brennkraftmaschine durch eine Kombination von einem Impulsstart, bei dem ein Elektromotor mit einer überhöhten Drehzahl betrieben wird, und einem Schleppstart, bei dem der Elektromotor mit einem erhöhten Drehmoment betrieben wird, gestartet wird. Dadurch kann ein besonders schneller und komfortabler Start der Brennkraftmaschine erfolgen. Unter einem „Impulsstart” soll in diesem Zusammenhang insbesondere ein Start einer Brennkraftmaschine verstanden werden, bei welchem insbesondere ein Massenträgheitsmoment eines Elektromotors zum Anschleppen der Brennkraftmaschine genutzt wird. Unter einem „Schleppstart” soll in diesem Zusammenhang insbesondere ein Start einer Brennkraftmaschine verstanden werden, bei welchem ein Elektromotor insbesondere während des Startvorgangs ein erhöhtes Drehmoment zum Anschleppen der Brennkraftmaschine bereitstellt. Der Hybridantriebsstrang bildet vorteilhaft einen Parallelhybridantriebsstrang aus. Die Erfindung betrifft solche Hybridantriebsstränge, die ein Getriebe mit mindestens einer automatisch betätigbaren Kupplung und/oder einem automatisch betätigbaren Schaltelement, wie insbesondere ein Schaltelement eines Wandlerautomatikgetriebes mit Planetenradsätzen, aufweisen. Die Erfindung betrifft insbesondere Hybridantriebsstränge, die ein Getriebe, welches als Doppelkupplungsgetriebe, Wandlerautomatikgetriebe, Automatisiertes Schaltgetriebe oder stufenloses Getriebe ausgebildet ist, aufweisen. Die Brennkraftmaschine weist vorzugsweise eine Schwungmasse auf. Der Elektromotor ist vorteilhaft auch generatorisch betreibbar. Der Elektromotor kann als Innenläufer- oder als Außenläufermaschine ausgebildet sein und kann als permanenterregte Synchronmaschine oder als Asynchronmaschine ausgebildet sein. Es sind im Rahmen der Erfindung auch andere Bauformen und Funktionstypen für den Elektromoter denkbar.It is proposed a method for starting an internal combustion engine in a hybrid powertrain for a motor vehicle, wherein the hybrid powertrain comprises an internal combustion engine and an electric motor as prime movers, starting from a purely electromotive operation, the internal combustion engine by a combination of a pulse start, in which an electric motor with is operated at an excessive speed, and a tow start, in which the electric motor is operated with an increased torque is started. This can be a particularly quick and comfortable start of the engine. A "pulse start" is to be understood in this context, in particular a start of an internal combustion engine, in which in particular a moment of inertia of an electric motor is used for towing the internal combustion engine. A "tow start" should be understood in this context, in particular a start of an internal combustion engine, in which an electric motor, in particular during the starting process provides an increased torque for towing the internal combustion engine. The hybrid powertrain advantageously forms a parallel hybrid powertrain. The invention relates to such hybrid powertrains, which have a transmission with at least one automatically operable clutch and / or an automatically operable switching element, such as in particular a switching element of a torque converter automatic transmission with planetary gear sets. The invention particularly relates to hybrid powertrains, which have a transmission which is designed as a dual-clutch transmission, automatic torque converter, automated manual or continuously variable transmission. The internal combustion engine preferably has a flywheel. The electric motor is advantageous also operated as a generator. The electric motor can be designed as an internal rotor or external rotor machine and can be designed as a permanent magnet synchronous machine or as an asynchronous machine. Within the scope of the invention, other types and types of functions for the electric motor are also conceivable.
In einer Ausgestaltung der Erfindung ist der für das erfindungsgemäße Verfahren vorgesehene Hybridantriebsstrang so ausgestaltet, dass die Brennkraftmaschine über eine Trennkupplung mit dem Elektromotor verbindbar ist. Es wird vorgeschlagen, dass in einer ersten Startphase der Elektromotor schlupfend mit einer Fahrzeugantriebswelle verbunden wird, während eine Trennkupplung zwischen der Brennkraftmaschine und dem Elektromotor geöffnet ist. Unter einer „Fahrzeugantriebswelle” soll im Rahmen der Erfindung eine Antriebswelle für das Kraftfahrzeug verstanden werden. Die Fahrzeugantriebswelle ist bei dieser Ausgestaltung der Erfindung, in einer Leistungsflußrichtung von der Brennkraftmaschine und/oder dem Elektromotor auf die Kraftfahrzeugräder betrachtet, nach dem Elektromotor in den Hybridantriebsstrang eingebunden. Unter einer „Fahrzeugantriebswelle” soll im Rahmen der Erfindung insbesondere eine Ausgangswelle eines Getriebes verstanden werden, wobei das Getriebe, in einem Leistungsflussrichtung von einer Brennkraftmaschine und/oder dem Elektromotor auf die Kraftfahrzeugräder betrachtet, nach dem Elektromotor in den Hybridantriebsstrang eingebunden ist und zwischen dem Elektromotor und der Fahrzeugantriebswelle eine Anfahrkupplung und/oder ein Schaltelement des Getriebes angeordnet ist. Im Rahmen der Erfindung wird insbesondere unter einem „schlupfend mit einer Fahrzeugantriebswelle” verbundenen Elektromotor verstanden, dass an einer Anfahrkupplung oder an einem Schaltelement des Getriebes ein Schlupfzustand eingestellt wird, so dass eine Drehzahl des Elektromotors sich von einer Drehzahl der Fahrzeugantriebswelle unterscheiden kann. Das Getriebe ist vorzugsweise als ein Doppelkupplungsgetriebe oder ein Planetengetriebe ausgebildet und zwischen dem Elektromotor und der Fahrzeugantriebswelle sind mehr als eine Anfahrkupplung oder mehrere Schaltelemente angeordnet. In der ersten Startphase wird der Elektromotor über die Drehzahl der Fahrzeugantriebswelle hinaus beschleunigt.In one embodiment of the invention, provided for the inventive method hybrid powertrain is designed so that the internal combustion engine via a clutch to the electric motor is connectable. It is proposed that in a first starting phase, the electric motor is slidably connected to a vehicle drive shaft, while a separating clutch between the internal combustion engine and the electric motor is opened. A "vehicle drive shaft" is to be understood in the context of the invention, a drive shaft for the motor vehicle. The vehicle drive shaft is considered in this embodiment of the invention, considered in a power flow direction of the internal combustion engine and / or the electric motor to the motor vehicle wheels, after the electric motor in the hybrid powertrain. A "vehicle drive shaft" is to be understood in the context of the invention, in particular an output shaft of a transmission, wherein the transmission considered in a power flow direction of an internal combustion engine and / or the electric motor to the vehicle wheels, after the electric motor is integrated into the hybrid powertrain and between the electric motor and the vehicle drive shaft is arranged a starting clutch and / or a switching element of the transmission. In the context of the invention is in particular a "slipping connected to a vehicle drive shaft" electric motor understood that a slip state is set at a starting clutch or on a switching element of the transmission, so that a rotational speed of the electric motor may differ from a rotational speed of the vehicle drive shaft. The transmission is preferably designed as a dual clutch transmission or a planetary gear and between the electric motor and the vehicle drive shaft more than one starting clutch or a plurality of switching elements are arranged. In the first starting phase, the electric motor is accelerated beyond the speed of the vehicle drive shaft.
Des Weiteren wird vorgeschlagen, dass zu Beginn einer zweiten Startphase, die eine Kombination aus Impulsstart und Schleppstart ist, die Trennkupplung – auf ein Zielmoment eingestellt wird, und der Elektromotor die Brennkraftmaschine anschleppt, bis eine Startdrehzahl der Brennkraftmaschine erreicht ist. Dadurch kann ein besonders zuverlässiger Start der Brennkraftmaschine erzielt werden. Darunter, dass die Trennkupplung zu Beginn der zweiten Startphase auf eine Zielmoment eingestellt wird, wird im Rahmen der Erfindung verstanden, dass ein Zielwert des von der Trennkupplung zu übertragenden Drehmoments eingestellt wird. Die Einstellung des Zielwerts des von der Trennkupplung zu übertragenden Drehmoments wird dabei vorteilhaft durch eine Einstellung einer elektrischen und/oder hydraulischen Betätigungseinrichtung der Trennkupplung bewirkt.Furthermore, it is proposed that at the beginning of a second starting phase, which is a combination of pulse start and towing start, the separating clutch - is set to a target torque, and the electric motor tows the internal combustion engine until a starting speed of the internal combustion engine is reached. As a result, a particularly reliable start of the internal combustion engine can be achieved. Under the fact that the separating clutch is set to a target torque at the beginning of the second starting phase, is understood within the scope of the invention that a target value of the torque to be transmitted from the separating clutch is set. The attitude the target value of the torque to be transmitted from the separating clutch is advantageously effected by setting an electrical and / or hydraulic actuating device of the separating clutch.
Ferner wird vorgeschlagen, dass in einer dritten Startphase eine Synchronisierung der Drehzahlen von Elektromotor und Brennkraftmaschine durch Beschleunigung der Brennkraftmaschine und gleichzeitiges weiteres Anschleppen durch den Elektromotor durchgeführt wird und anschließend eine drehfeste Verbindung zwischen dem Elektromotor und der Fahrzeugantriebswelle hergestellt wird. Dadurch kann eine besonders komfortable Einkopplung der Brennkraftmaschine in den Hybridantriebsstrang erreicht werden.It is also proposed that in a third starting phase, a synchronization of the rotational speeds of the electric motor and internal combustion engine by acceleration of the internal combustion engine and simultaneous further towing by the electric motor is performed and then a rotationally fixed connection between the electric motor and the vehicle drive shaft is produced. This allows a particularly comfortable coupling of the internal combustion engine can be achieved in the hybrid powertrain.
Für die Folge der für das erfindungsgemäße Verfahren festzulegenden Trajektorien für einen Drehzahlverlauf des Elektromotors über der Zeit während des erfindungsgemäßen Startvorgangs der Brennkraftmaschine ist in einer Weiterbildung der Erfindung ein Regelungskonzept vorgesehen. Das erfindungsgemäße Regelungskonzept sieht dabei vorteilhaft vor, dass lediglich eine Phase oder ein Bereich geregelt wird, während in einer anderen Phase oder in einem anderern Bereich lediglich eine Steuerung vorgenommen wird. In dem gemäß dieser Weiterbildung des erfindungsgemäßen Verfahrens vorgesehen Regelungskonzept wird eine Festlegung einer Trajektorienfolge durch eine Regelung des für die Trennkupplung eingestellten Zielmoments unter Berücksichtigung variierender Betriebsbedingungen vorgenommen. Vorteilhaft ist so ein auf variierende Betriebsbedingungen angepasster Übergang vom elektrischen Fahrbetrieb in den Hybridbetrieb darstellbar. Unter einer Trajektorie wird im Rahmen der Erfindung ein für eine definierte Betriebsbedingung berechneter Drehzahlverlauf des Elektromotors über der Zeit während des erfindungsgemäßen Startvorgangs der Brennkraftmaschine verstanden, wobei sich aus der definierten Betriebsbedingung die Einstellgrößen des Hybridantriebsstrangs, für welchen das erfindungsgemäße Verfahren vorgesehen ist, ergeben.For the sequence of trajectories to be determined for the method according to the invention for a speed curve of the electric motor over time during the starting process of the internal combustion engine according to the invention, a control concept is provided in a development of the invention. The control concept according to the invention advantageously provides that only one phase or one area is regulated while only one control is performed in another phase or in another area. In the control concept provided according to this development of the method according to the invention, a determination of a trajectory sequence is carried out by regulating the target torque set for the separating clutch, taking into account varying operating conditions. Advantageously, such adapted to varying operating conditions transition from electrical driving in the hybrid mode can be displayed. In the context of the invention, a trajectory is understood to be a speed curve of the electric motor over time during the starting process of the internal combustion engine that is calculated for a defined operating condition, the setting variables of the hybrid drive train, for which the method according to the invention is provided, resulting from the defined operating condition.
In einer Weiterbildung der Erfindung entfällt die erste Startphase des erfindungsgemäßen Verfahrens, wenn der Start der Brennkraftmaschine während eines stattfindenden Hochschaltvorgangs angefordert wird. Vorteilhaft ist die aktuelle Drehzahl des Elektromotors während eines Hochschaltvorgang gegenüber der Drehzahl der Fahrzeugantriebswelle im neuen Zielgang des Getriebes bereits erhöht, so dass eine weitere Beschleunigung des Elektromotors in dieser Weiterbildung des erfindungsgemäßen Verfahrens nicht mehr notwendig ist. Vorteilhaft kann der Drehzahlsprung einer Hochschaltung des Getriebes für das erfindungsgemäße Verfahren genutzt werden.In a further development of the invention, the first starting phase of the method according to the invention is dispensed with if the starting of the internal combustion engine is requested during an upshifting operation taking place. Advantageously, the current speed of the electric motor during an upshift against the speed of the vehicle drive shaft in the new target gear of the transmission is already increased, so that a further acceleration of the electric motor in this embodiment of the method is no longer necessary. Advantageously, the speed jump of an upshift of the transmission can be used for the inventive method.
Weitere Vorteile ergeben sich aus der folgenden Figurenbeschreibung. In den Figuren ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Figuren, die Figurenbeschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages will become apparent from the following description of the figures. In the figures, an embodiment of the invention is shown. The figures, the description of the figures and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Dabei zeigen:Showing:
Die
Die Fahrzeugantriebswelle
Ein Kraftschluss zwischen dem Elektromotor
Um die Brennkraftmaschine
In der
Somit ist in der ersten Startphase t1 der Elektromotor
Zu Beginn einer zweiten Startphase t2 wird die Trennkupplung
In einer dritten Startphase t3 wird eine Synchronisierung der Drehzahlen von Elektromotor
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1010
- BrennkraftmaschineInternal combustion engine
- 1212
- HybridantriebsstrangHybrid powertrain
- 1414
- Elektromotorelectric motor
- 1616
- FahrzeugantriebswelleVehicle drive shaft
- 1818
- Trennkupplungseparating clutch
- 2020
- Getriebetransmission
- 2222
- Getriebekupplungtransmission clutch
- 2424
- Differenzialgetriebedifferential gear
- 2626
- Antriebsraddrive wheel
- 2828
- Antriebsraddrive wheel
- 3030
- Getriebegehäusegearbox
- 3232
- ElektromotordrehzahlElectric motor speed
- 3434
- BrennkraftmaschinendrehzahlEngine speed
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 102011079079 A1 [0002] DE 102011079079 A1 [0002]
Claims (4)
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DE102014010227A1 true DE102014010227A1 (en) | 2016-01-14 |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011079079A1 (en) | 2011-07-13 | 2013-01-17 | Zf Friedrichshafen Ag | Method for controlling a hybrid drive train of a motor vehicle |
-
2014
- 2014-07-10 DE DE102014010227.0A patent/DE102014010227A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102011079079A1 (en) | 2011-07-13 | 2013-01-17 | Zf Friedrichshafen Ag | Method for controlling a hybrid drive train of a motor vehicle |
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