Four wheel drive vehicle

Details Four wheel drive vehicle Four wheel drive vehicle

1988-06-08

1989-12-12

Pekar, John A.

Motor vehicles

Having four wheels driven

3644241, B60K 1734

Patent

active

048861413

ABSTRACT:
In a multi-axle drive vehicle having a first axle which is directly coupled to a power source, and a second axle which is coupled to the power source by way of a coupling such as a viscous coupling which is adapted to transmit torque as a mathematical function of a difference in rotational speed between its input end and output end, to the end of eliminating the problems arising from transmission of braking force between the wheels of difference axles, the vehicle is further provided with a clutch for selectively interrupting transmission of power from the power source to the second axle, a brake sensor for detecting activation of a brake system of the vehicle, and a control unit for activating the clutch when the brake sensor has detected activation of the brake system. The conditions for activating the clutch may further include that the vehicle is running at a high speed which may be detected either directly or from a shift position of the power transmission system of the vehicle.

REFERENCES:
patent: 4723624 (1988-02-01), Kawasaki et al.
patent: 4744435 (1988-05-01), Schnurer

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