Four wheel drive system

Details Four wheel drive system Four wheel drive system

1990-12-06

1992-06-09

Marmor, Charles A.

Motor vehicles

Having four wheels driven

Including separate mechanical assemblies for transmitting...

180247, 180249, B60K 17354, B60K 2308

Patent

active

051199009

ABSTRACT:
A four wheel drive system for a vehicle includes comprising a power plant for producing a driving force, a front wheel driving mechanism for transmitting the driving force to drive right and left front wheels, a rear wheel driving mechanism for transmitting the driving force to drive right and left rear wheels, and right and left wheel clutches provided in one of the driving mechanisms for controlling the amount of the driving force transmitted to the wheels. A cut-off clutch is provided for controlling the driving force transmitted to the wheels of the one of the driving mechanisms, and a control device causes the cut-off clutch to engage before the wheel clutch is engaged. The driving force is transmitted sequentially rather than instantly from the cut-off clutch, the wheel clutches and to the wheels so as to suppress the torque shock creative in connection with a change in the drive condition.

REFERENCES:
patent: 3916625 (1975-11-01), Holtkamp
patent: 4681180 (1987-07-01), Oyama et al.
patent: 4723624 (1988-02-01), Kawasaki et al.
patent: 4770266 (1988-09-01), Yamaguchi et al.
patent: 4776424 (1988-10-01), Naito
patent: 4921065 (1990-05-01), Hamada et al.
patent: 4936406 (1990-06-01), Tezuka et al.
patent: 4949265 (1990-08-01), Eguchi et al.
patent: 5014809 (1991-05-01), Matsuda

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