DE102005025617B4 - Control device for a drive system in a motor vehicle with a variable four-wheel drive - Google Patents
Control device for a drive system in a motor vehicle with a variable four-wheel drive Download PDFInfo
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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
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/08—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles
- B60K23/0808—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles for varying torque distribution between driven axles, e.g. by transfer clutch
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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
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
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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
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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
- 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
- B60W10/12—Conjoint control of vehicle sub-units of different type or different function including control of differentials
- B60W10/14—Central differentials for dividing torque between front and rear axles
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18127—Regenerative braking
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
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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)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Steuereinrichtung (8) für ein Antriebssystem in einem Kraftfahrzeug mit einem Allradantrieb mit einer variablen Antriebsdrehmomentverteilung zwischen Vorderachse (VA) und Hinterachse (HA), umfassend einen Antriebsstrang mit einer Antriebseinrichtung (2) zur Erzeugung eines Antriebsdrehmoments, und mit einer Momentenverteilungseinrichtung (6), mittels der das erzeugte Antriebsdrehmoment anteilig zwischen Vorderachse (VA) und Hinterachse (HA) aufteilbar ist, wobei die Steuereinrichtung (8) zur Ansteuerung der Momentenverteilungseinrichtung (6) derart ausgebildet ist, dass im Falle einer Bremsanforderung, für den Fall, dass keine Momentenverteilung mit maximalem Bremsmoment vorliegt, eine Momentenverteilung automatisch einstellbar ist, die dazu führt, dass das auf die Fahrbahn übertragbare Bremsmoment der Antriebseinrichtung (2) erhöht wird, indem zumindest eine elektrische Maschine vorhanden ist, deren Bremsmoment im generatorischen Betrieb durch die über die Steuereinrichtung ansteuerbare Momentenverteilungseinrichtung (6) gezielt zwischen Vorder- und Hinterachse des Fahrzeugs verteilt wird.Control device (8) for a drive system in a motor vehicle with an all-wheel drive with a variable drive torque distribution between the front axle (VA) and rear axle (HA), comprising a drive train with a drive device (2) for generating a drive torque, and with a torque distribution device (6), by means of which the drive torque generated can be divided proportionally between the front axle (VA) and rear axle (HA), the control device (8) for controlling the torque distribution device (6) being designed in such a way that in the event of a braking request, in the event that there is no torque distribution maximum braking torque is present, a torque distribution can be adjusted automatically, which leads to the braking torque of the drive device (2) that can be transmitted to the road being increased by having at least one electric machine, the braking torque of which in generator operation is controlled by the torque distribution device (2) which can be controlled via the control device ( 6) is specifically distributed between the front and rear axles of the vehicle.
Description
Die Erfindung betrifft eine Steuereinrichtung für ein Antriebssystem in einem Kraftfahrzeug mit einem variablen Allradantrieb. Insbesondere betrifft die Erfindung ein Antriebssystem bei einem Allradfahrzeug mit einer Brennkraftmaschine als Hauptantriebsquelle und einer elektrischen Maschine zur Erzeugung zumindest eines zusätzlichen Bremsmomentes und damit zur Erzeugung rekuperativer elektrischer Energie zur Speicherung in einem elektrischen Energiespeicher.The invention relates to a control device for a drive system in a motor vehicle with a variable all-wheel drive. In particular, the invention relates to a drive system in an all-wheel drive vehicle with an internal combustion engine as the main drive source and an electric machine for generating at least one additional braking torque and thus for generating recuperative electrical energy for storage in an electrical energy storage device.
Es sind sowohl frontangetriebene als auch heckangetriebene Fahrzeuge bekannt, die, durch manuelle oder automatische Zuschaltung der Hinterachse bzw. Zuschaltung der Vorderachse als angetriebene Achse, in einem Vierrad- bzw. Allradantriebbetrieb betreibbar sind, und die ausgehend von dem Allradantriebbetrieb durch entsprechende manuelle oder automatische Abschaltung einer Antriebsachse wieder in einem Zweiachs- bzw. Einachsantriebbetrieb (Vierrad- bzw. Zweiradbetrieb) betreibbar sind.Both front-wheel drive and rear-wheel drive vehicles are known which can be operated in a four-wheel or all-wheel drive mode by manually or automatically switching on the rear axle or switching on the front axle as a driven axle, and which, starting from the all-wheel drive mode, can be operated by corresponding manual or automatic switch-off a drive axle can again be operated in a two-axle or single-axle drive operation (four-wheel or two-wheel operation).
In der Fachzeitschrift ATZ, 2/2004, Jahrgang 106, Seite 92 - 102 ist unter dem Titel - xDrive, Der neue Allradantrieb im BMW X3 und BMW X5 - ein variabler Allradantrieb beschrieben, bei dem mittels einem Verteilergetriebe mit steuerbarer Kupplung eine vollvariable Momentenverteilung zwischen Vorder- und Hinterachse ermöglicht ist.In the specialist magazine ATZ, 2/2004, volume 106, pages 92 - 102, under the title - xDrive, The new all-wheel drive in the BMW X3 and BMW X5 - a variable all-wheel drive is described, in which a fully variable torque distribution between Front and rear axle is possible.
Weiterhin ist aus der
Des Weiteren ist aus der
Die
Zum weiteren technischen Hintergrund wird auf die
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Steuereinrichtung für ein Antriebssystem anzugeben, welches im Hinblick auf Verschleiß der Bremsanlage und im Hinblick auf die Energiebilanz des Fahrzeugs verbessert ist.The invention is based on the object of specifying a generic control device for a drive system, which is improved with regard to wear of the brake system and with regard to the energy balance of the vehicle.
Erfindungsgemäß wird die Aufgabe durch die Gesamtheit der Merkmale des Anspruchs 1 gelöst, während in den Unteransprüchen bevorzugte Weiterbildungen der Erfindung angegeben sind.According to the invention, the object is achieved by the entirety of the features of
Die erfindungsgemäße Steuereinrichtung bzw. das erfindungsgemäße Antriebssystem für ein Kraftfahrzeug mit variablem Allradantrieb umfasst eine Antriebseinrichtung zur Erzeugung eines Antriebsdrehmoments, eine Momentenverteilungseinrichtung zur gezielten Verteilung des Antriebsdrehmoments sowie eine Steuereinrichtung zur Ansteuerung der Momentenverteilungseinrichtung. Unter einem variablen Allradantrieb im Sinne der Erfindung sind sowohl Antriebe zu verstehen, bei denen eine einfache Umschaltung zwischen Zweiradantrieb und Vierradantrieb mit unveränderbar vordefinierter Momentenverteilung im Vierradbetrieb eingestellt ist, als auch Antriebe, bei denen eine Momentenverteilung zwischen Vorder- und Hinterachse (bzw. zwischen den Antriebsrädern) vollvariabel (zwischen 0 und 100%) einstellbar ist. Erfindungsgemäß ist die Steuereinrichtung derart ausgebildet, dass im Falle einer Bremsanforderung der Allradantrieb derart aktiviert wird, dass ein erhöhtes Bremsmoment allein durch den Antrieb (unter Nichtbeachtung der Betriebsbremse) realisierbar ist. Hierfür wird über die Steuereinrichtung die Momentenverteilungseinrichtung derart angesteuert, dass im Falle einer Bremsanforderung - für den Fall, dass nicht bereits eine Momentenverteilung eingestellt ist, die ein maximales Bremsmoment (bzw. eine maximale Übertragung der Bremskraft) gewährleistet - eine automatische Einstellung der Verteilung der Antriebsmomente und damit der Bremsmomente (Motorbremsbetrieb) erfolgt, so dass das auf die Fahrbahn übertragbare Bremsmoment (bzw. die übertragbare Bremskraft) erhöht wird.The control device according to the invention or the drive system according to the invention for a motor vehicle with variable all-wheel drive comprises a drive device for generating a drive torque, a torque distribution device for targeted distribution of the drive torque and a control device for controlling the torque distribution device. For the purposes of the invention, a variable all-wheel drive is understood to mean both drives in which a simple switch between two-wheel drive and four-wheel drive is set with an unchangeable predefined torque distribution in four-wheel operation, as well as drives in which a torque distribution between the front and rear axles (or between the drive wheels) is fully adjustable (between 0 and 100%). According to the invention, the control device is designed such that in the event of a braking request, the all-wheel drive is activated in such a way that an increased braking torque can be achieved solely by the drive (ignoring the service brake). For this purpose, the torque distribution device is controlled via the control device in such a way that in the event of a braking request - in the event that a torque distribution has not already been set that ensures a maximum braking torque (or a maximum transmission of the braking force) - an automatic adjustment of the distribution of the drive torques and thus the braking torque (engine braking operation) takes place, so that the braking torque that can be transmitted to the road (or the braking force that can be transmitted) is increased.
In einer bevorzugten Ausführung der Erfindung umfasst die Antriebseinrichtung eine Brennkraftmaschine und/oder eine generatorisch als auch motorisch betreibbare elektrische Maschine. Mit Vorteil ist zumindest eine elektrische Maschine vorhanden, deren Bremsmoment im generatorischen Betrieb durch die über eine Steuereinrichtung ansteuerbare Momentenverteilungseinrichtung gezielt zwischen Vorder- und Hinterachse des Fahrzeugs verteilt wird. Vorzugsweise ist die elektrische Maschine zusätzlich zu der als Hauptantriebsquelle dienenden Brennkraftmaschine vorgesehen.In a preferred embodiment of the invention, the drive device comprises an internal combustion engine and/or an electrical machine that can be operated as a generator or as a motor. It is advantageous to have at least one electric machine whose braking torque is regenerative Operation is specifically distributed between the front and rear axles of the vehicle by the torque distribution device that can be controlled via a control device. The electric machine is preferably provided in addition to the internal combustion engine serving as the main drive source.
Die Momentenverteilungseinrichtung ist vorzugsweise als Verteilergetriebe mit steuerbarer Kupplung ausgebildet, wie es bereits im eingangs zitierten ATZ-Artikel beschrieben wird. Gemäß der Ausführung einer solchen Momentenverteilungseinrichtung wird an dieser Stelle in vollem Umfang den ATZ-Artikel xDrive (Fachzeitschrift ATZ, 2/2004, Jahrgang 106, Seite 92 - 102 - xDrive, Der neue Allradantrieb im BMW X3 und BMWX5) Bezug genommen. Gemäß der Erfindung ist die Steuereinrichtung zur Ansteuerung der Momentenverteilungseinrichtung zur gezielten Verteilung der (Motor-) Bremsmomente wie vorstehend und im Folgenden beschrieben ausgebildet.The torque distribution device is preferably designed as a transfer case with a controllable clutch, as already described in the ATZ article cited at the beginning. According to the design of such a torque distribution device, the ATZ article xDrive (ATZ trade magazine, 2/2004, volume 106, pages 92 - 102 - xDrive, The new all-wheel drive in the BMW X3 and BMWX5) is referred to in full at this point. According to the invention, the control device for controlling the torque distribution device for the targeted distribution of the (engine) braking torque is designed as described above and below.
In einer anderen Ausführung kann, anstelle der einen zentralen elektrischen Maschine, deren zentrales Bremsmoment über die als Verteilergetriebe mit steuerbarer Kupplung ausgebildete Momentenverteilungseinrichtung gezielt verteilt wird, auch jeder Antriebsachse (oder jedem Antriebsrad) eine separate elektrische Maschine zugeordnet sein, die im Bedarfsfall (Bremsvorgang) zur Erzeugung eines Bremsmomentes über eine Steuereinrichtung unterschiedlich bzw. unabhängig angesteuert werden.In another embodiment, instead of the one central electric machine, the central braking torque of which is specifically distributed via the torque distribution device designed as a transfer case with a controllable clutch, each drive axle (or each drive wheel) can also be assigned a separate electric machine, which, if necessary (braking process). to generate a braking torque can be controlled differently or independently via a control device.
Im Folgenden wird die Erfindung anhand von Figuren näher erläutert. Es zeigen:
-
1 : ein Antriebssystem gemäß der Erfindung in schematischer Darstellung, und -
2 : die Funktionsweise des erfindungsgemäßen Antriebssystems in einer möglichen Ausführungsform anhand eines Funktionsablaufplans.
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1 : a drive system according to the invention in a schematic representation, and -
2 : the functionality of the drive system according to the invention in a possible embodiment based on a functional flowchart.
Durch die Nutzung der rekuperativen Energie, die dadurch erzeugt wird, dass während des Bremsvorgangs die elektrische Maschine 2b im generatorischen Betrieb arbeitet und so einerseits zusätzliches Bremsmoment generiert und andererseits elektrische Energie erzeugt, kann eine zusätzliche Verbrauchsreduzierung erreicht werden. Zur Zwischenspeicherung der elektrischen Energie ist ein Energiespeicher ES mit elektrochemischen und/oder kapazitiven Energiespeicherelementen vorgesehen.By using the recuperative energy, which is generated by the fact that the
Die das Antriebsmoment bzw. ein Motorbremsmoment (je nach Betriebszustand) erzeugende Antriebseinrichtung ist im dargestellten Ausführungsbeispiel über das Verteilergetriebe der Momentenverteilungseinrichtung 6 mittels einer ersten Antriebswelle AW1 mit der Hauptantriebsachse des Fahrzeugs (hier: Hinterachse HA) verbunden und mittels einer zweiten Antriebswelle AW2 mit einer weiteren Antriebsachse (hier. Vorderachse VA) zum Zwecke des Antriebs verbunden.In the exemplary embodiment shown, the drive device generating the drive torque or an engine braking torque (depending on the operating state) is connected to the main drive axle of the vehicle (here: rear axle HA) via the transfer case of the torque distribution device 6 by means of a first drive shaft AW1 and to another one by means of a second drive shaft AW2 Drive axle (here: front axle VA) connected for the purpose of driving.
Die erfindungsgemäße Steuereinrichtung 8 kann als einzelnes Steuergerät oder als Steuergeräteverbund bei dem in unterschiedlichen Steuergeräten modular einzelne Steuerfunktionen hinterlegt sind, ausgebildet sein. Vorliegend ist die erfindungsgemäße Funktionalität in einem separaten Steuergerät zur Ansteuerung der Momentenverteilungseinrichtung 6 angeordnet.The
Neben der dargestellten Ausführung eines erfindungsgemäßen Antriebssystems mit einer zentralen elektrischen Maschine zur Erzeugung eines Antriebs- bzw. Bremsmoments - welches über eine, als Verteilergetriebe mit steuerbarer Kupplung ausgebildete, Momentenverteilungseinrichtung 6 gezielt zur Erzeugung eines maximalen (Motor-)Bremsmoments verteilt wird - sind andere Anordnungen von Antriebssystemen im Rahmen der Erfindung denkbar. Beispielsweise könnte anstelle oder zusätzlich zu der zentralen elektrischen Maschine 2b jeder Antriebsachse oder jedem Antriebsrad eine separate elektrische Maschine 2b' zugeordnet sein, die über eine Steuereinrichtung dann zum Zwecke der Momentenverteilung für ein maximal mögliches (Motor-)Bremsmoment angesteuert werden.In addition to the illustrated embodiment of a drive system according to the invention with a central electric machine for generating a drive or braking torque - which is specifically designed to generate a maximum (engine) braking torque via a torque distribution device 6 designed as a transfer case with a controllable clutch ment is distributed - other arrangements of drive systems are conceivable within the scope of the invention. For example, instead of or in addition to the central
Durch das erfindungsgemäße Verfahren wird mit Vorteil eine Verbrauchsreduzierung aufgrund der erhöhten Bremsenergierückgewinnung erzielt. Auch ist ein deutlich geringerer Verschleiß der Betriebsbremse zu erwarten und gegebenenfalls sogar die Verwendung einer kleiner dimensionierten Betriebsbremse möglich.The method according to the invention advantageously achieves a reduction in consumption due to the increased braking energy recovery. Significantly less wear on the service brake is also to be expected and the use of a smaller service brake may even be possible.
Claims (3)
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DE102009059903A1 (en) * | 2009-12-21 | 2011-06-22 | Schaeffler Technologies GmbH & Co. KG, 91074 | System for variable torque distribution |
US8663051B2 (en) | 2010-07-14 | 2014-03-04 | E-Aam Driveline Systems Ab | Axle assembly with torque distribution drive mechanism |
US8998765B2 (en) | 2010-07-14 | 2015-04-07 | E-Aam Driveline Systems Ab | Axle assembly with torque distribution drive mechanism |
DE102010047443A1 (en) | 2010-10-04 | 2012-04-05 | Audi Ag | Motor vehicle with four-wheel drive |
DE102013206204B4 (en) | 2013-04-09 | 2018-03-22 | Bayerische Motoren Werke Aktiengesellschaft | Control device for an at least temporarily four-wheel drive motor vehicle |
US20160368359A1 (en) * | 2014-02-24 | 2016-12-22 | Mahindra And Mahindra Limited | An arrangement for packaging an engine of a vehicle |
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DE102005025617A1 (en) | 2006-12-07 |
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