Torque transfer device and engageable, shiftable clutch in an all-wheel drive arrangement for a motor vehicle
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United States of America Patent
Stats
-
Oct 20, 1987
Grant Date -
N/A
app pub date -
Apr 18, 1986
filing date -
Apr 25, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multiple-disk visco-clutch is arranged in the drive line of the front axle and the rear axle of a four wheel-drive motor vehicle. In order to prevent an overheating of the multiple-disk visco-clutch, such as when the vehicle is being towed, the visco-clutch is separable from the drive line by means of a shiftable toothed clutch. The lubricating-oil pressure, the intake pipe vacuum or other characteristic quantities of the motor vehicle may be used for actuating the toothed clutch when the internal-combustion engine is stopped, thereby automatically causing the separating of the multiple disk visco-clutch from the drive line.
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