Power transmission apparatus for a vehicle

Details Power transmission apparatus for a vehicle Power transmission apparatus for a vehicle

1988-05-17

1989-07-25

Pekar, John A.

Motor vehicles

Having four wheels driven

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

192 58A, B60K 17348, F16D 3106

Patent

active

048504475

ABSTRACT:
A power transmission apparatus for a vehicle which is used for a four-wheel drive vehicle driving both the front and rear wheels by a driving force from an engine, in which a discharge amount of a hydraulic pump provided between a front wheel drive shaft and a rear wheel drive shaft to generate hydraulic pressure by a rotation speed difference between the two rotary shafts is desirably adjusted by a remote-controllable variable throttle valve provided on the way of a discharge oil passage extending from the hydraulic pump, so that a simple hydraulic circuit is used to make the coupling of two rotary shafts freely adjustable from loose condition to tight condition.

REFERENCES:
patent: 2397140 (1946-03-01), Hickman
patent: 3298489 (1967-01-01), Brand
patent: 3577803 (1971-05-01), Mueller
patent: 3773130 (1971-11-01), Mueller
patent: 4676336 (1987-06-01), Hiramatsu

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