Power transmitting system for a four-wheel drive vehicle

Details Power transmitting system for a four-wheel drive vehicle Power transmitting system for a four-wheel drive vehicle

1988-02-10

1989-10-24

Hill, Mitchell J.

Motor vehicles

Having four wheels driven

74711, 180247, 180249, 192 58B, 36442405, B60K 1734

Patent

active

048756989

ABSTRACT:
A viscous coupling is provided in a power transmitting system for transmitting power of an engine to auxiliary driving wheels, and a lock device is provided for locking the viscous coupling so as to directly transmit the power to the auxiliary driving wheels. Driving torque of the engine is detected and compared with a predetermined driving torque and an output signal is produced when the detected driving torque exceeds the predetermined driving torque. An actuator responds to the output signal for operating the lock device to lock the viscous coupling.

REFERENCES:
patent: 3845671 (1974-11-01), Sharp
patent: 4031780 (1977-06-01), Dolan
patent: 4562897 (1986-01-01), Renneker
patent: 4723624 (1988-02-01), Kawasaki

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