Driving force distribution control system for four wheel drive v

Details Driving force distribution control system for four wheel drive v Driving force distribution control system for four wheel drive v

1994-12-06

1997-03-18

Boehler, Anne Marie

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

180248, B60K 1735

Patent

active

056114079

ABSTRACT:
It is an object of this invention to make compact a system for controlling the distribution of a driving force and also to simplify its controlling procedure. To achieve this object, a motor 200, 2200 is designed to be electrically controlled, and the rotation of the motor is transformed to the stroke of a plunger 370, 2370 by a hydraulic pressure producing cylinder device 300. By doing this, a hydraulic pressure is produced within a hydraulic pressure chamber 376, 2376 and the hydraulic pressure thus produced is supplied to an operating cylinder 40. The operating cylinder 40 controls a gain of an engagement force of a variable torque clutch device 30. Also, it is another object of the present invention to provide a fail-safe technique for a hydraulic pressure supply device of the motor drive type. In order to achieve this second object, there is further employed a hydraulic pressure compensating device 500, 2500 for supplying, when a failure has occurred disenabling rotation of the motor 200, 2200, a predetermined hydraulic pressure to the operating cylinder 40 in response to the occurrence of the failure and maintain the hydraulic pressure to that level.

REFERENCES:
patent: 4928494 (1990-05-01), Glamm
patent: 5009294 (1991-04-01), Ghoneim
patent: 5011237 (1991-04-01), Matouka et al.
patent: 5127315 (1992-07-01), Gerard et al.
patent: 5184877 (1993-02-01), Miyakawa
patent: 5207488 (1993-05-01), Newton et al.
patent: 5259476 (1993-11-01), Matsuno et al.
patent: 5418725 (1995-05-01), Eto
patent: 5497333 (1996-03-01), Sasaki
European Search Report of counterpart EP 94 30 9262.

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