Driving force distribution control system for a 4 wheel drive ve

Details Driving force distribution control system for a 4 wheel drive ve Driving force distribution control system for a 4 wheel drive ve

1987-12-02

1989-10-17

Pekar, John A.

Motor vehicles

Having four wheels driven

3644241, B60K 17344

Patent

active

048740560

ABSTRACT:
A control system for controlling a driving torque distribution between front and rear axles of a four wheel drive vehicle includes a transfer clutch capable of continuously varying a torque transmitted to the front axle, front and rear wheel speed sensors for determining a front and rear wheel speed difference, a sensor for directly or indirectly sensing a lateral acceleration of the vehicle and a control unit. The control unit controls the transfer clutch in a characteristic such that the torque transmitted to the front axle is increased continuously and monotonically with an increase of the wheel speed difference at a steep rate when the lateral acceleration is low, and at a gradual rate when the lateral acceleration is high.

REFERENCES:
patent: 4757870 (1988-07-01), Torii
patent: 4773500 (1988-09-01), Naito et al.
patent: 4776424 (1988-11-01), Naito

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