Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1987-09-22
1989-02-21
Mitchell, David M.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
180 701, 180291, B60K 17348
Patent
active
048057207
ABSTRACT:
A vehicle (10) disclosed incorporates an improved drivetrain (18) for providing full time four wheel driving. The drivetrain (18) includes an engine (20) driving a transmission (22) including multiple gear paths (28) and a differential (30) located within a single oil bath (36) defined by a housing (34) of the transmission. Front and rear outputs (38,40) of the transmission (22) respectively drive front and rear axles (42,44) through associated front and rear differentials (46,48) to provide the full time four wheel driving. In the preferred construction, front and rear driveshafts (50,52) extend between the transmission outputs (33,40) and the front and rear differentials (46,48 ) to provide the driving. It is also possible for the transmission (22) to incorporate a viscous clutch (54) for limiting interaxle differential rotation in order to prevent one axle from spinning when one of its wheels loses traction. Best results are achieved when the front and rear axles (42,44) are supported for rotation about fixed axes with respect to a vehicle frame (56) and used in association with front and rear driving wheel suspensions (62, 64) in order to reduce the unsprung mass of the vehicle and thereby provide improved performance with adverse road conditions.
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Diederiks, Jr. Everett G.
Mitchell David M.
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