DE3721626C2 - - Google Patents
Info
- Publication number
- DE3721626C2 DE3721626C2 DE3721626A DE3721626A DE3721626C2 DE 3721626 C2 DE3721626 C2 DE 3721626C2 DE 3721626 A DE3721626 A DE 3721626A DE 3721626 A DE3721626 A DE 3721626A DE 3721626 C2 DE3721626 C2 DE 3721626C2
- Authority
- DE
- Germany
- Prior art keywords
- wheels
- clutch
- actuator
- motor vehicle
- wheel drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/322—Systems specially adapted for vehicles driven by more than one axle, e.g. Four Wheel-Drive vehicles
-
- 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
Description
Die Erfindung bezieht sich auf ein Kraftfahrzeug mit Vier radantrieb, bei dem im Antriebsstrang zwischen den beiden Achsen eine über ein Stellglied steuerbare kraftschlüssige Kupplung eingebaut ist.The invention relates to a motor vehicle with four wheel drive, in the drive train between the two axles a non-positive clutch controllable via an actuator is installed.
Bei einem bekannten Kraftfahrzeug dieser Art (DE-OS 33 17 247) ist die steuerbare kraftschlüssige Kupplung derart angeordnet und ausgebildet, daß eine durch Betätigen der Betriebsbremse hervorgerufene Verringerung der Umlaufgeschwindigkeit der Vorderräder nicht über den Antriebsstrang auf die Hinterräder übertragen wird, damit auf jeden Fall eine Blockierneigung der Vorderräder sich nicht auch auf die Hinterräder überträgt, weil beim Blockieren der Hinterräder deren Seitenführungskräfte verlorengehen und sich damit ein unstabiler Fahrzustand einstellt. Nachteilig ist dabei jedoch, daß die Drehmomentverbindung zwischen den beiden Achsen bei jedem Bremsvorgang unterbrochen wird, obwohl in vielen Betriebsfällen bei Drehmomentverbindung zwischen Vorder- und Hinterachse ein stabileres Bremsverhalten des Fahrzeuges erreicht wird.In a known motor vehicle of this type (DE-OS 33 17 247) the controllable friction clutch is arranged in this way and trained that one by operating the service brake reduction in the rotational speed of the front wheels not on the drivetrain on the rear wheels is transmitted so that there is definitely a tendency to block the Front wheels are not also transferred to the rear wheels because when blocking the rear wheels their cornering forces get lost and an unstable driving state arises. The disadvantage, however, is that the torque connection interrupted between the two axes with each braking operation will, although in many cases with torque connection a more stable braking behavior between the front and rear axles of the vehicle is reached.
Es sind auch schon Kraftfahrzeuge bekannt (DE-OS 33 02 936), bei denen in Abhängigkeit vom Schlupf zweier dauernd angetriebener Räder auf Vierradantrieb umgeschaltet wird und der Schlupf mit Hilfe von Drehzahlsensoren durch Drehzahlvergleich der dauernd angetriebenen Räder mit den fallweise zuschaltbaren Rädern bestimmt wird. Hier wird aber im Normalbetrieb mit Zweiradantrieb gefahren und das Umschalten auf Vierradantrieb erfolgt nur bei erhöhtem Antriebsschlupf.Motor vehicles are already known (DE-OS 33 02 936), where depending on the slip of two continuously driven Wheels switched to four-wheel drive and the Slip with the help of speed sensors by speed comparison the permanently driven wheels with the occasionally switchable Wheels is determined. But here is in normal operation Two-wheel drive driven and switching to four-wheel drive only occurs when the drive slip is increased.
Schließlich sind zur Optimierung des Bremsverhaltens Fahrzeuge mit sogenanntem Antiblockiersystem bekannt, das verhältnismäßig komplizierte und aufwendige Einrichtungen erfordert und bei Vierradantrieb nicht unverändert anwendbar ist, weshalb in diesen Fällen bei jedem Bremsvorgang die Drehmomentübertragung zwischen den Achsen unterbrochen werden muß oder zusätzliche aufwendige Maßnahmen in den Einrichtungen des Antiblockiersystems getroffen werden müssen.After all, vehicles are used to optimize braking behavior known with the so-called anti-lock braking system, which is relatively requires complicated and expensive facilities and at Four-wheel drive is not applicable unchanged, which is why in these cases with each braking operation Torque transmission between the axes are interrupted must or additional complex measures in the facilities of the anti-lock braking system must be taken.
Zum Stand der Technik zählt weiterhin eine schlupfgeregelte Bremsanlage für Straßenfahrzeuge mit Allradantrieb (DE-OS 34 18 520). Hier erfolgt ein Lösen der Differentialsperre zwischen Vorder- und Hinterachse dann, wenn eine Blockiertendenz der Räder besteht bzw. dann, wenn die ABS-Regelung einsetzt. Diese schlupfgeregelte Bremsanlage für Straßenfahrzeuge mit Allradantrieb ist zum Ausgleich der Wegunterschiede der einzelnen Räder mit Ausgleichsgetrieben ausgerüstet, deren Ausgleichswirkung durch Differentialsperren, beispielsweise durch kraftschlüssige oder formschlüssige Koppelung der Antriebswellen aufhebbar oder reduzierbar ist. Es ergibt sich damit ein erheblicher baulicher Aufwand.The state of the art still includes a slip-controlled Brake system for road vehicles with all-wheel drive (DE-OS 34 18 520). The differential lock is released here between the front and rear axles if one There is a tendency for the wheels to lock, or when the ABS control starts. This slip-controlled brake system for Road vehicles with all-wheel drive is to compensate for the Differences in path of the individual wheels with differential gears equipped, the compensating effect of differential locks, for example, by non-positive or positive Coupling of the drive shafts can be canceled or reduced. It This results in a considerable construction effort.
Der vorliegenden Erfindung liegt demgegenüber die Aufgabe zugrunde, ein Kraftfahrzeug der eingangs genannten Art zu schaffen, bei welchem mit verhältnismäßig einfachen Mitteln das Bremsverhalten verbessert bzw. die Blockiergefahr vermieden wird.In contrast, the present invention has the object based on a motor vehicle of the type mentioned create, with which with relatively simple means Improved braking behavior and avoided the risk of locking becomes.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein auf ein Stellglied wirkender Drehzahlsensor zur Ermittlung der Verzögerung vorgesehen ist und daß das Stellglied im Sinne einer Verringerung des übertragenen Momentes auf die Kupplung einwirkt, wenn die zeitliche Ableitung der Verzögerung einen vorbestimmten Wert überschreitet. Hierdurch ergibt sich der Vorteil, daß die zeitliche Ableitung der Verzögerung als auslösendes Kriterium zum Lösen der starren Verbindung zwischen Vorder- und Hinterachse herangezogen wird, was konstruktiv lediglich einfacher Maßnahmen bedarf.This object is achieved in that a an actuator acting speed sensor to determine the Delay is provided and that the actuator in the sense a reduction in the torque transmitted to the clutch acts if the time derivative of the delay exceeds a predetermined value. This results in the Advantage that the time derivative of the delay as triggering criterion for releasing the rigid connection between Front and rear axles are used, which is constructive only simple measures are required.
In weiterer Ausgestaltung der Erfindung kann in an sich bekannter Weise der Bremsdruck für die Hinterräder zugleich senkbar sein.In a further embodiment of the invention in itself known way, the brake pressure for the rear wheels at the same time be lowered.
Da vierradgetriebene Fahrzeuge mit Drehmomentverbindung zwischen den beiden Achsen in fast allen Fällen ein stabileres Bremsverhalten als Fahrzeuge ohne eine solche Drehmomentverbindung der Achsen aufweisen, bleibt erfindungsgemäß die Kupplung im Normalbetrieb geschlossen. Ergibt sich aber eine sehr rasche Drehzahlverringerung an den Rädern einer Achse und damit auch am Antriebsstrang zwischen den Achsen, was ein Anzeichen für starke Blockierneigung, insbesondere der Vorderräder, ist, so wird die Kupplung allmählich oder auch plötzlich gelöst und damit die Drehmomentübertragung zwischen den Achsen verringert oder unterbrochen, so daß die Hinterräder nicht auch zum Blockieren kommen. Die Verhinderung des Blockierens kann dann noch dadurch verstärkt werden, daß der Bremsdruck für die Hinterräder gesenkt wird, was selbstverständlich zur Voraussetzung hat, daß die Drehzahlerfassung zwischen der Kupplung und den Hinterrädern erfolgt. Sollte bei Anordnung je eines Bremskreises für die Vorder- und Hinterräder einer dieser Bremskreise ausfallen, so wird erfindungsgemäß das verbleibende Bremsmoment dennoch auf alle vier Räder übertragen.Because four-wheel drive vehicles with torque connection a more stable between the two axes in almost all cases Braking behavior as vehicles without such Have torque connection of the axes remains According to the invention, the clutch is closed in normal operation. However, there is a very rapid reduction in speed the wheels of an axle and thus also on the drive train between the axes, which is a sign of strong The tendency to lock, especially the front wheels, is so the clutch is released gradually or suddenly and thus reducing the torque transmission between the axles or interrupted so that the rear wheels are not also come to blocking. The prevention of blocking can then be reinforced by the fact that the brake pressure for the rear wheels, which goes without saying has the requirement that the speed detection between the clutch and the rear wheels. Should at Arrangement of a brake circuit for the front and rear wheels one of these brake circuits fail, it is according to the invention the remaining braking torque nevertheless transfer all four wheels.
Die Zeichnung zeigt als Ausführungsbeispiel ein erfindungsgemäßes Kraftfahrzeug im Schema.The drawing shows an exemplary embodiment Motor vehicle according to the invention in the diagram.
Das Kraftfahrzeug mit Vierradantrieb wird vom Motor 1 über ein Schaltgetriebe 2 angetrieben, wobei im Antriebsstrang 3 zwischen der Vorderachse 4 und der Hinterachse 5 eine kraftschlüssige Kupplung 6 eingebaut ist, die mit Hilfe eines Stellgliedes 7 gesteuert werden kann. Der Antriebsstrang 3 weist noch eine Meßscheibe 8 mit einem Sensor 9 zur Drehzahlerfassung der Räder einer Achse 4 oder 5 auf. Der Drehzahlsensor 9 ist an das Stellglied 7 angeschlossen, so daß bei Überschreiten eines vorbestimmten Gradienten der Drehzahlverringerung die Kupplung 6 im Sinne eines Lösens betätigt wird.The motor vehicle with four-wheel drive is driven by the engine 1 via a manual transmission 2 , a non-positive clutch 6 being installed in the drive train 3 between the front axle 4 and the rear axle 5 , which clutch can be controlled with the aid of an actuator 7 . The drive train 3 also has a measuring disk 8 with a sensor 9 for detecting the speed of the wheels of an axle 4 or 5 . The speed sensor 9 is connected to the actuator 7 , so that when a predetermined gradient of the speed reduction is exceeded, the clutch 6 is actuated in the sense of a release.
Mit 10 ist der Hauptbremszylinder bezeichnet, von dem aus die Radbremsen 11 der Räder der Vorderachse 4 direkt beaufschlagt werden, wogegen die Leitung 12 zu den Rad bremsen 13 der Räder der Hinterachse 5 über einen Brems druckregler 14 geführt ist, der auch vom Stellglied 7 ge steuert wird, um beim Lösen der Kupplung 6 zugleich den Bremsdruck für die Räder der Hinterachse 5 abzusenken.With 10 of the master cylinder is referred to, from which the wheel brakes 11 of the wheels of the front axle 4 are directly applied, whereas the line 12 to the wheel brakes 13 of the wheels of the rear axle 5 is guided via a brake pressure regulator 14, which is also from the actuator 7 ge is controlled in order to simultaneously lower the brake pressure for the wheels of the rear axle 5 when the clutch 6 is released .
Der Drehzahlsensor könnte auch direkt der Vorder achse 4 zugeordnet sein.The speed sensor could also be assigned directly to the front axle 4 .
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0178086A AT394686B (en) | 1986-07-02 | 1986-07-02 | MOTOR VEHICLE WITH FOUR-WHEEL DRIVE |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3721626A1 DE3721626A1 (en) | 1988-01-07 |
DE3721626C2 true DE3721626C2 (en) | 1991-09-19 |
Family
ID=3520817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19873721626 Granted DE3721626A1 (en) | 1986-07-02 | 1987-06-30 | Motor vehicle with four-wheel drive |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS6325134A (en) |
AT (1) | AT394686B (en) |
DE (1) | DE3721626A1 (en) |
IT (1) | IT1221929B (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19502426A1 (en) * | 1994-01-26 | 1995-07-27 | Honda Motor Co Ltd | Anti-lock braking system for motor vehicle that can be driven in two or four-wheel drive mode |
EP0799740A2 (en) * | 1996-04-06 | 1997-10-08 | Volkswagen Aktiengesellschaft | Method for controlling a controllable clutch of a four-wheel drive vehicle |
US5694321A (en) | 1994-11-25 | 1997-12-02 | Itt Automotive Europe Gmbh | System for integrated driving stability control |
US5701248A (en) | 1994-11-25 | 1997-12-23 | Itt Automotive Europe Gmbh | Process for controlling the driving stability with the king pin inclination difference as the controlled variable |
US5711023A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | System for determining side slip angle |
US5711024A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | System for controlling yaw moment based on an estimated coefficient of friction |
US5710705A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | Method for determining an additional yawing moment based on side slip angle velocity |
US5710704A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | System for driving stability control during travel through a curve |
US5732379A (en) | 1994-11-25 | 1998-03-24 | Itt Automotive Europe Gmbh | Brake system for a motor vehicle with yaw moment control |
US5732377A (en) | 1994-11-25 | 1998-03-24 | Itt Automotive Europe Gmbh | Process for controlling driving stability with a yaw rate sensor equipped with two lateral acceleration meters |
US5732378A (en) | 1994-11-25 | 1998-03-24 | Itt Automotive Europe Gmbh | Method for determining a wheel brake pressure |
US5742507A (en) | 1994-11-25 | 1998-04-21 | Itt Automotive Europe Gmbh | Driving stability control circuit with speed-dependent change of the vehicle model |
US5774821A (en) | 1994-11-25 | 1998-06-30 | Itt Automotive Europe Gmbh | System for driving stability control |
DE10260196A1 (en) * | 2002-12-20 | 2004-07-01 | Bayerische Motoren Werke Ag | Method for controlling a switchable clutch in a drive train of a four-wheel drive motor vehicle |
DE19712973B4 (en) * | 1996-04-06 | 2008-11-13 | Volkswagen Ag | Method for controlling a controllable clutch in the drive train between a front axle and a rear axle of a motor vehicle with four-wheel drive |
DE102013217484A1 (en) | 2012-09-05 | 2014-05-15 | Magna Powertrain Ag & Co. Kg | Control for an all-wheel drive |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2575452B2 (en) * | 1988-03-31 | 1997-01-22 | 日産自動車株式会社 | Anti-skid control system for four-wheel drive vehicles |
IT1250818B (en) * | 1991-07-18 | 1995-04-21 | Fiat Auto Spa | PERMANENT INTEGRAL DRIVE VEHICLE. |
AT6086U1 (en) * | 2002-04-12 | 2003-04-25 | Steyr Powertrain Ag & Co Kg | MOTOR VEHICLE WITH A BRAKE SYSTEM AND A DRIVE SYSTEM |
CN108639315A (en) * | 2018-07-06 | 2018-10-12 | 安徽思源三轻智能制造有限公司 | Undercarriage |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1580079B1 (en) * | 1966-07-14 | 1970-07-09 | Kloeckner Humboldt Deutz Ag | Actuating device for the drive and the brakes of a four-wheel drive vehicle |
JPS58133922A (en) * | 1982-01-29 | 1983-08-09 | Fuji Heavy Ind Ltd | Shifting control device of four-wheel drive vehicle |
JPS59109430A (en) * | 1982-12-15 | 1984-06-25 | Fuji Heavy Ind Ltd | Switch controller for part time four wheel drive car |
DE3317247A1 (en) * | 1983-05-11 | 1984-11-15 | Volkswagenwerk Ag, 3180 Wolfsburg | MOTOR VEHICLE WITH 4WD DRIVE |
JPS6064035A (en) * | 1983-09-19 | 1985-04-12 | Fuji Heavy Ind Ltd | Selection control device for four-wheel drive vehicle |
DE3418520A1 (en) * | 1984-05-18 | 1985-11-21 | Teves Gmbh Alfred | SLIP-CONTROLLED BRAKE SYSTEM FOR ROAD VEHICLES WITH ALL-WHEEL DRIVE |
DE3538351C2 (en) * | 1985-10-29 | 1994-04-28 | Teves Gmbh Alfred | Brake system with anti-lock control for a motor vehicle with all-wheel drive |
-
1986
- 1986-07-02 AT AT0178086A patent/AT394686B/en not_active IP Right Cessation
-
1987
- 1987-06-30 JP JP62161419A patent/JPS6325134A/en active Pending
- 1987-06-30 DE DE19873721626 patent/DE3721626A1/en active Granted
- 1987-07-01 IT IT21148/87A patent/IT1221929B/en active
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19502426A1 (en) * | 1994-01-26 | 1995-07-27 | Honda Motor Co Ltd | Anti-lock braking system for motor vehicle that can be driven in two or four-wheel drive mode |
US5612880A (en) * | 1994-01-26 | 1997-03-18 | Honda Giken Kogyo Kabushiki Kaisha | Process for controlling travel state during braking in vehicle |
DE19502426C2 (en) * | 1994-01-26 | 2001-10-18 | Honda Motor Co Ltd | Method for controlling the drive state of a vehicle with connectable four-wheel drive and an anti-lock control system during braking of the vehicle |
US5732379A (en) | 1994-11-25 | 1998-03-24 | Itt Automotive Europe Gmbh | Brake system for a motor vehicle with yaw moment control |
US5732378A (en) | 1994-11-25 | 1998-03-24 | Itt Automotive Europe Gmbh | Method for determining a wheel brake pressure |
US5711023A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | System for determining side slip angle |
US5711024A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | System for controlling yaw moment based on an estimated coefficient of friction |
US5710705A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | Method for determining an additional yawing moment based on side slip angle velocity |
US5710704A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | System for driving stability control during travel through a curve |
US5711025A (en) | 1994-11-25 | 1998-01-20 | Itt Automotive Europe Gmbh | Driving stability control system with selective brake actuation |
US5694321A (en) | 1994-11-25 | 1997-12-02 | Itt Automotive Europe Gmbh | System for integrated driving stability control |
US5732377A (en) | 1994-11-25 | 1998-03-24 | Itt Automotive Europe Gmbh | Process for controlling driving stability with a yaw rate sensor equipped with two lateral acceleration meters |
US5701248A (en) | 1994-11-25 | 1997-12-23 | Itt Automotive Europe Gmbh | Process for controlling the driving stability with the king pin inclination difference as the controlled variable |
US5742507A (en) | 1994-11-25 | 1998-04-21 | Itt Automotive Europe Gmbh | Driving stability control circuit with speed-dependent change of the vehicle model |
US5774821A (en) | 1994-11-25 | 1998-06-30 | Itt Automotive Europe Gmbh | System for driving stability control |
US5862503A (en) | 1994-11-25 | 1999-01-19 | Itt Automotive Europe Gmbh | System for driving stability control |
EP0799740A2 (en) * | 1996-04-06 | 1997-10-08 | Volkswagen Aktiengesellschaft | Method for controlling a controllable clutch of a four-wheel drive vehicle |
EP0799740B1 (en) * | 1996-04-06 | 2005-02-16 | Volkswagen Aktiengesellschaft | Method for controlling a controllable clutch of a four-wheel drive vehicle |
DE19712973B4 (en) * | 1996-04-06 | 2008-11-13 | Volkswagen Ag | Method for controlling a controllable clutch in the drive train between a front axle and a rear axle of a motor vehicle with four-wheel drive |
DE10260196A1 (en) * | 2002-12-20 | 2004-07-01 | Bayerische Motoren Werke Ag | Method for controlling a switchable clutch in a drive train of a four-wheel drive motor vehicle |
WO2004058532A1 (en) | 2002-12-20 | 2004-07-15 | Bayerische Motoren Werke Aktiengesellschaft | Method for controlling a shiftable clutch in the drive train of a 4-wheel drive motor vehicle |
US7143855B2 (en) | 2002-12-20 | 2006-12-05 | Bayerische Motoren Werke Aktiengesellschaft | Method for controlling a shiftable clutch in the drive train of a 4-wheel drive motor vehicle |
DE102013217484A1 (en) | 2012-09-05 | 2014-05-15 | Magna Powertrain Ag & Co. Kg | Control for an all-wheel drive |
Also Published As
Publication number | Publication date |
---|---|
IT8721148A0 (en) | 1987-07-01 |
ATA178086A (en) | 1991-11-15 |
DE3721626A1 (en) | 1988-01-07 |
JPS6325134A (en) | 1988-02-02 |
AT394686B (en) | 1992-05-25 |
IT1221929B (en) | 1990-08-31 |
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Free format text: DERZEIT KEIN VERTRETER BESTELLT |
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