DE102005045841A1 - Drive train for motor vehicle, has internal combustion engine producing driving torque, and two-stage transmission device that is formed such that it automatically switches between transmission stages based on drive end rotational direction - Google Patents

Drive train for motor vehicle, has internal combustion engine producing driving torque, and two-stage transmission device that is formed such that it automatically switches between transmission stages based on drive end rotational direction Download PDF

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Publication number
DE102005045841A1
DE102005045841A1 DE102005045841A DE102005045841A DE102005045841A1 DE 102005045841 A1 DE102005045841 A1 DE 102005045841A1 DE 102005045841 A DE102005045841 A DE 102005045841A DE 102005045841 A DE102005045841 A DE 102005045841A DE 102005045841 A1 DE102005045841 A1 DE 102005045841A1
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Prior art keywords
drive
transmission device
internal combustion
electric machine
combustion engine
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DE102005045841A
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German (de)
Inventor
Manfred Lauer
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Priority to DE102005045841A priority Critical patent/DE102005045841A1/en
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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
    • B60W20/30—Control strategies involving selection of transmission gear ratio
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The train has an internal combustion engine (2) producing a driving torque on a drive axle. An input shaft (10a) of a vehicle transmission device (10) is coupled with an output shaft of the engine using a coupling. An output shaft (10b) of the device (10) acts on the axle by a differential transmission. A two-stage transmission device (12) is provided for coupling the machine between the output of the device (10) and the differential transmission. The device (12) is formed such that it automatically switches between transmission stages based on a drive end rotational direction.

Description

Die Erfindung betrifft einen Antriebsstrang für ein Kraftfahrzeug, bei dem alternativ entweder über eine Brennkraftmaschine oder über eine elektrische Maschine ein Antriebsmoment erzeugt wird.The The invention relates to a drive train for a motor vehicle, in which alternatively either via a Internal combustion engine or over an electric machine, a drive torque is generated.

Fahrzeuge mit derartigen Antriebssträngen sind bereits vielfach bekannt und teilweise bereits auf dem Markt verfügbar (z.B. Toyota Prius).vehicles with such drive trains are already widely known and partly already available on the market (e.g. Toyota Prius).

Darüber hinaus ist in dem Buch zum 7. LuK Kolloquium, vom 11./12. April 2002, unter dem Titel „Gearing up for tomorrow Take a LuK inside ...", Seite 259–261 ein kupplungsloses zweistufiges Getriebe beschrieben, über welches eine elektrische Startermaschine mittels einem Riemenantrieb an die Kurbelwelle einer Brennkraftmaschine gekoppelt ist.Furthermore is in the book of the 7th LuK Colloquium, from 11./12. April 2002, under the title "Gearing up for tomorrow Take a LuK inside ... ", page 259-261 a clutchless two-stage Gear described above which is an electric starter machine by means of a belt drive is coupled to the crankshaft of an internal combustion engine.

Der Erfindung liegt die Aufgabe zugrunde, einen Antriebsstrang für ein Kraftfahrzeug mit einem konstruktiv vereinfachten und robusten Aufbau anzugeben, insbesondere soll ein Antriebsstrang geschaffen werden, der sich für Kraftfahrzeuge mit hoher Brennkraftmaschinenleistung eignet.Of the Invention is based on the object, a drive train for a motor vehicle with a structurally simplified and robust design, In particular, a drive train is to be created, which is for motor vehicles with high engine power is suitable.

Erfindungsgemäß wird die Aufgabe durch die Gesamtheit der Merkmale des Anspruchs 1 gelöst. Durch die Kopplung der elektrischen Maschine mit der Brennkraftmaschine über eine kupplungsfreie (kupplungslose) zweistufige Getriebeeinrichtung, die derart ausgebildet ist, dass sie in Abhängigkeit von ihrer antriebsseitigen Drehrichtung automatisch zwischen ihren beiden Übersetzungsstufen umschaltet, wird ein einfacher Aufbau eines Antriebsstranges gewährleistet. Durch diese Art der Kopplung ist zwingend stets nur eine Antriebsquelle – entweder Brennkraftmaschine oder elektrische Maschine – zur Erzeugung eines positiven Antriebsmoments aktiv zu schalten. Die elektrische Maschine kann aufgrund der Übersetzung kleiner ausgeführt werden als herkömmliche elektrische Maschinen, die ohne Übersetzung in den Antriebsstrang gekoppelt sind. Ferner kann die Kupplung zwischen Brennkraftmaschine und Fahrzeuggetriebeeinrichtung wie bei einer Auslegung ohne elektrische Maschine dimensioniert werden. Schließlich wird die Kupplung zusätzlich geschont für den Fall beispielsweise, dass der Anfahrbetrieb stets elektrisch erfolgt.According to the invention Problem solved by the entirety of the features of claim 1. By the coupling of the electric machine with the internal combustion engine via a Clutch-free (clutchless) two-stage transmission device, which is designed such that it depends on its drive-side The direction of rotation automatically switches between its two gear ratios ensures a simple construction of a drive train. By this kind The coupling is always necessarily only one drive source - either Internal combustion engine or electric machine - to generate a positive Actuator torque to switch active. The electric machine can smaller due to the translation accomplished be considered conventional electrical machines without translation are coupled in the drive train. Furthermore, the coupling between Internal combustion engine and vehicle transmission device as in a Dimensioning without electrical machine dimensioned. Finally will the clutch in addition spared for the case, for example, that the starting operation is always electric he follows.

Vorzugsweise ist die elektrische Maschine derart dimensioniert, dass mittels ihr ausschließlich ein Anfahrbetrieb bei geringer Lastanforderung (unterhalb einer vordefinierten Lastanforderungsgrenze) erfolgt und bei größerer Lastanforderung (z.B. Volllast/kick-down) ein Antrieb über die Brennkraftmaschine erfolgt.Preferably is the electrical machine dimensioned such that means her exclusively Starting operation with low load request (below a predefined Load request limit) and at a greater load request (e.g. Full load / kick-down) a drive over the internal combustion engine takes place.

Bevorzugt findet der Antriebsstrang Verwendung bei leistungsstarken Fahrzeugen, insbesondere Fahrzeugen mit Heckantrieb.Prefers the powertrain is used in high-performance vehicles, especially vehicles with rear-wheel drive.

Zur Optimierung des Schwerpunktes ist die zweistufige Getriebeeinrichtung unmittelbar auf der Welle zwischen dem Ausgang der Fahrzeuggetriebeeinrichtung und dem Differentialgetriebe der Antriebsachse angeordnet und über ein Kraftübertragungsmittel, wie einen Riemen oder eine Kette, mit der Rotorwelle der elektrischen Maschine verbunden.to Optimization of the center of gravity is the two-stage gear mechanism directly on the shaft between the output of the vehicle transmission device and the differential gear of the drive axle and arranged over a Power transmission means, like a belt or a chain, with the rotor shaft of the electric Machine connected.

Um bei einem elektrischen Antrieb ein ausreichendes Antriebsmoment bereitstellen zu können, und zugleich bei einem generatorischen Betrieb der elektrischen Maschine (beispielsweise im Schubbetrieb des Fahrzeugs oder beim Antrieb über die Brennkraftmaschine) keine zu hohen Drehzahlen der elektrischen Maschine zuzulassen, wird eine Übersetzung der zweistufigen Getriebeeinrichtung von vier zu eins (4:1) gewählt. Dabei stellt sich die Übersetzung 4 (vier) automatisch für den Fall ein, dass die elektrische Maschine motorisch betrieben wird (also als Antriebsmaschine dient), und stellt sich die Übersetzung 1 (eins) automatisch ein, für den Fall des generatorischen Betriebs der elektrischen Maschine.Around In an electric drive sufficient drive torque to be able to provide, and at the same time in a regenerative operation of the electric machine (For example, in overrun mode of the vehicle or when driving via the internal combustion engine) not to allow too high rotational speeds of the electric machine, becomes a translation of the two-stage transmission device selected from four to one (4: 1). there imagine the translation 4 (four) automatically for the case in which the electric machine is operated by a motor is (ie serves as a prime mover), and turns the translation 1 (one) automatically, for the case of the generator operation of the electric machine.

Ferner betrifft die Erfindung gemäß Patentanspruch 4 ein Kraftfahrzeug mit einem, wie vorstehend beschrieben ausgebildeten Antriebsstrang.Further relates to the invention according to claim 4 is a motor vehicle with a, as described above Powertrain.

In den Unteransprüchen und der nachfolgenden Figurenbeschreibung sind bevorzugte Aus- und Weiterbildungen der Erfindung angegeben.In the dependent claims and the following description of the figures are preferred training and further education of the invention.

In der einzigen Zeichnungsfigur ist ein nachfolgend näher beschriebenes Ausführungsbeispiel der Erfindung dargestellt. Die Figur zeigt einen Antriebsstrang gemäß der Erfindung in einer schematischen Darstellung. Der erfindungsgemäße Antriebsstrang für ein Kraftfahrzeug umfasst eine Brennkraftmaschine 2 zur Erzeugung eines ersten Antriebsmoments auf eine Antriebsachse A sowie eine elektrische Maschine 4 nebst elektrischem Energiespeicher 6 und einer Steuereinrichtung 8 zur Steuerung des Energieflusses zwischen elektrischer Maschine 4 und Energiespeicher 6 zur Erzeugung eines zweiten Antriebsmoments auf die Antriebsachse A. Ferner umfasst der erfindungsgemäße Antriebsstrang eine Fahrzeuggetriebeeinrichtung 10, die mit ihrer Getriebeeingangswelle 10a über eine Kupplung K mit der Abtriebswelle 2a der Brennkraftmaschine 2 gekoppelt ist, und die mit ihrer Getriebeausgangswelle 10b über ein Differentialgetriebe D auf die Antriebsachse A wirkt sowie eine kupplungslose zweistufige Getriebeeinrichtung 12, über die die elektrische Maschine 4 zwischen dem Ausgang der Fahrzeuggetriebeeinrichtung 10 und dem Differentialgetriebe D oder zwischen der Kupplung K und dem Eingang der Fahrzeuggetriebeeinrichtung 10 zur Übertragung eines Moments angekoppelt ist. Dabei ist die zweistufige Getriebeeinrichtung 12 derart ausgebildet ist, dass sie in Abhängigkeit von ihrer antriebsseitigen Drehrichtung automatisch zwischen ihren beiden Übersetzungsstufen umschaltet. Für eine mögliche Ausgestaltung der zweistufigen Getriebeeinrichtung 12 wird an dieser Stelle ausdrücklich bezug genommen auf das eingangs zitierte LuK Kolloquium und der diesbezügliche Inhalt in den Offenbarungsgehalt dieser Anmeldung mit einbezogen.In the single drawing figure, an embodiment of the invention described in more detail below is shown. The figure shows a drive train according to the invention in a schematic representation. The drive train according to the invention for a motor vehicle comprises an internal combustion engine 2 for generating a first drive torque on a drive axle A and an electric machine 4 together with electrical energy storage 6 and a control device 8th for controlling the flow of energy between the electric machine 4 and energy storage 6 for generating a second drive torque on the drive axle A. Furthermore, the drive train according to the invention comprises a vehicle transmission device 10 that with its transmission input shaft 10a via a coupling K with the output shaft 2a the internal combustion engine 2 coupled, and with its transmission output shaft 10b via a differential gear D acts on the drive axle A and a clutchless two-stage transmission device 12 about which the electric machine 4 between the output of the vehicle transmission device 10 and the differential gear D or between the clutch K and the input of the vehicle transmission device 10 is coupled to transmit a moment. Here is the two-stage transmission device 12 is designed such that it automatically switches between its two gear ratios depending on their drive-side direction of rotation. For a possible embodiment of the two-stage transmission device 12 At this point, reference is expressly made to the LuK colloquium quoted above and the relevant content is included in the disclosure of this application.

Darüber hinaus ist die Brennkraftmaschine 2, beispielsweise über einen Riemenantrieb, mit einem zusätzlichen Generator G gekoppelt, über den der elektrische Energiespeicher 6 geladen werden bzw. das Bordnetz mit Strom versorgt werden kann.In addition, the internal combustion engine 2 , For example, via a belt drive, coupled to an additional generator G, via which the electrical energy storage 6 can be charged or the electrical system can be supplied with electricity.

In der dargestellten Ausführung kommuniziert die Steuereinrichtung 8 mit weiteren Steuergeräten, wie einer Motorsteuerung 14. Auch die Kupplung K und die Fahrzeuggetriebeeinrichtung 10 werden über die Steuereinrichtung 8 oder die Motorsteuerung 14 entsprechend gesteuert. Die Steuerung erfolgt derart, dass stets nur eine Antriebsmaschine zur Erzeugung eines Antriebsmoments motorisch aktiv ist, und für den Fall, dass die elektrische Maschine 4 das Antriebsmoment erzeugt, die Brennkraftmaschine 2 durch Öffnung der Kupplung K vom angetrieben Teil des Antriebsstrangs abgekoppelt ist. Da die elektrische Maschine 4 aufgrund der Kopplung in den Antriebsstrang über die kupplungslose zweistufige Getriebeeinrichtung 12, nicht vom angetrieben Antriebsstrang abgekoppelt (getrennt) werden kann, wird die elektrische Maschine 4 für den Fall des Schubbetriebs oder den Antrieb durch die Brennkraftmaschine 2 generatorisch betrieben und speist rekuperierte Energie ins Bordnetz ein.In the illustrated embodiment, the controller communicates 8th with other control devices, such as a motor control 14 , Also, the clutch K and the vehicle transmission device 10 be through the control device 8th or the engine control 14 controlled accordingly. The control takes place such that always only one drive machine for generating a drive torque is motor-active, and in the event that the electric machine 4 generates the drive torque, the internal combustion engine 2 is disconnected by opening the clutch K from the driven part of the drive train. As the electric machine 4 due to the coupling in the drive train via the clutchless two-stage transmission device 12 , can not be decoupled (disconnected) from the powered driveline, becomes the electric machine 4 in the case of overrun operation or the drive by the internal combustion engine 2 operated as a generator and feeds recuperated energy into the electrical system.

Im dargestellten Ausführungsbeispiel ist die Getriebeeinrichtung 12 unmittelbar auf der Getriebeausgangswelle 10b im hinteren Teil eines heckgetriebenen Fahrzeugs angeordnet und über Kraftübertragungsmittel 16, wie einen Riemen- oder Kettenantrieb oder dergleichen mit der Rotorwelle 4a der elektrischen Maschine 4 antriebsmäßig verbunden. Hierdurch wird die Gewichtsverteilung in Richtung Antriebsachse erheblich verbessert. Um die elektrische Maschine 4 sowohl motorisch als auch generatorisch bestmöglich einsetzen zu können, weist die zweistufige Getriebeeinrichtung ein Übersetzungsverhältnis von 4:1 auf (Übersetzungsverhältnis 4 im motorischen Betrieb der elektrischen Maschine 4 und Übersetzungsverhältnis 1 im generatorischen Betrieb der elektrischen Maschine 4).In the illustrated embodiment, the transmission device 12 directly on the transmission output shaft 10b arranged in the rear part of a rear-wheel drive vehicle and via power transmission means 16 such as a belt or chain drive or the like with the rotor shaft 4a the electric machine 4 drivingly connected. As a result, the weight distribution in the direction of the drive axle is significantly improved. To the electric machine 4 Both motorized and regenerative use as best as possible, the two-stage transmission device has a transmission ratio of 4: 1 (ratio 4 in the motor operation of the electric machine 4 and gear ratio 1 in the generator operation of the electric machine 4 ).

Claims (4)

Antriebsstrang für ein Kraftfahrzeug, umfassend – eine Brennkraftmaschine (2) zur Erzeugung eines ersten Antriebsmoments auf eine Antriebsachse (A), – eine elektrische Maschine (4) nebst elektrischem Energiespeicher (6) und einer Steuereinrichtung (8) zur Steuerung des Energieflusses zwischen elektrischer Maschine (4) und Energiespeicher (6) zur Erzeugung eines zweiten Antriebsmoments auf die Antriebsachse (A), – eine Fahrzeuggetriebeeinrichtung (10) die mit ihrer Getriebeeingangswelle (10a) über eine Kupplung (K) mit der Abtriebswelle (2a) der Brennkraftmaschine (2) gekoppelt ist, und die mit ihrer Getriebeausgangswelle (10b) über ein Differentialgetriebe (D) auf die Antriebsachse (A) wirkt, und – eine kupplungslose zweistufige Getriebeeinrichtung (12), über die die elektrische Maschine (4) zwischen dem Ausgang der Fahrzeuggetriebeeinrichtung (10) und dem Differentialgetriebe (D) oder zwischen der Kupplung (K) und dem Eingang der Fahrzeuggetriebeeinrichtung (10) zur Übertragung eines Moments angekoppelt ist, – wobei die zweistufige Getriebeeinrichtung (12) derart ausgebildet ist, dass sie in Abhängigkeit von ihrer antriebsseitigen Drehrichtung automatisch zwischen ihren beiden Übersetzungsstufen umschaltet, – und wobei zur Erzeugung des Antriebsmoments stets nur eine Antriebsmaschine, entweder die Brennkraftmaschine (2) oder die elektrische Maschine (4), motorisch betrieben wird.Drive train for a motor vehicle, comprising - an internal combustion engine ( 2 ) for generating a first drive torque on a drive axle (A), - an electric machine ( 4 ) in addition to electrical energy storage ( 6 ) and a control device ( 8th ) for controlling the flow of energy between the electrical machine ( 4 ) and energy storage ( 6 ) for generating a second drive torque to the drive axle (A), - a vehicle transmission device ( 10 ) with their transmission input shaft ( 10a ) via a coupling (K) with the output shaft ( 2a ) of the internal combustion engine ( 2 ), and with its transmission output shaft ( 10b ) acts via a differential gear (D) on the drive axle (A), and - a clutchless two-stage transmission device ( 12 ), over which the electric machine ( 4 ) between the output of the vehicle transmission device ( 10 ) and the differential gear (D) or between the clutch (K) and the input of the vehicle transmission device ( 10 ) is coupled to transmit a moment, - wherein the two-stage transmission device ( 12 ) is designed such that it automatically switches between its two gear ratios as a function of its drive-side rotational direction, and - for generating the drive torque always only one drive machine, either the internal combustion engine ( 2 ) or the electric machine ( 4 ), is powered by a motor. Antriebsstrang nach Anspruch 1, dadurch gekennzeichnet, dass die zweistufige Getriebeeinrichtung (12) ein Übersetzungsverhältnis von vier zu eins aufweist, wobei die Übersetzung 4 sich einstellt, wenn die elektrische Maschine (4) sich im motorischen Betrieb befindet, und die Übersetzung 1 sich einstellt, wenn die elektrische Maschine (4) sich im generatorischen Betrieb befindet.Drive train according to claim 1, characterized in that the two-stage transmission device ( 12 ) has a gear ratio of four to one, wherein the translation 4 occurs when the electric machine ( 4 ) is in engine operation, and the ratio 1 is set when the electric machine ( 4 ) is in regenerative operation. Antriebsstrang nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die zweistufige Getriebeeinrichtung (12) unmittelbar auf der Welle zwischen dem Ausgang der Fahrzeuggetriebeeinrichtung (10) und dem Differentialgetriebe (D) angeordnet und über ein Kraftübertragungsmittel (16), insbesondere einen Riemen oder eine Kette, mit der Rotorwelle (4a) der elektrischen Maschine (4) verbunden ist.Drive train according to one of the preceding claims, characterized in that the two-stage transmission device ( 12 ) directly on the shaft between the output of the vehicle transmission device ( 10 ) and the differential gear (D) and via a power transmission means ( 16 ), in particular a belt or a chain, with the rotor shaft ( 4a ) of the electric machine ( 4 ) connected is. Kraftfahrzeug mit einem Antriebsstrang gemäß einem der vorstehenden Ansprüche.Motor vehicle with a drive train according to a of the preceding claims.
DE102005045841A 2005-09-24 2005-09-24 Drive train for motor vehicle, has internal combustion engine producing driving torque, and two-stage transmission device that is formed such that it automatically switches between transmission stages based on drive end rotational direction Ceased DE102005045841A1 (en)

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DE3246230A1 (en) * 1982-12-14 1984-06-14 Volkswagenwerk Ag Transmission assembly
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DE4211586A1 (en) * 1992-04-07 1993-10-14 Audi Ag Transmission for hybrid vehicle - has IC engine driving one axle and electric motor driving another via epicyclic gearbox and differential
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