Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1983-11-18
1986-07-01
Love, John J.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
180233, 192 36, 192 41S, 192 44, 192 47, B60K 1734
Patent
active
045974675
ABSTRACT:
A four-wheel drive mechanism for a front-wheel drive vehicle includes a final drive mechanism driven from the output shaft of the engine, which transmits power through a differential to the front drive wheels, and through a gear set and an overrunning clutch to the rear axleshafts. The gear ratio of the gear set is established so that the outer race of the clutch is driven slower than the speed of the front drive wheels so that the rear axleshafts in normal driving conditions are not driven. If, however, the front wheels slip relative to the road surface, the clutch will transmit power to the rear axleshafts or to one rear axleshaft that turns slower than the rear axleshaft. A roller cage retains the rollers and is biased by a spring into contact with a drag surface that is selectively connected to and disconnected from the casing of the drive mechanism. A solenoid, engaged whenever the shift mechanism of the transmission is moved to the neutral position, disengages the drag connection between the cage and casing. The cage springs bias the cage to a neutral position where the rollers are moved out of contact with the ramp surfaces of the clutch.
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Dukes Mark C.
Ford Motor Company
Harrington Donald J.
Love John J.
McKenzie Frank G.
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