Continuously variable V-belt transmission including hydrodynamic transmission unit with lock-up means
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United States of America Patent
Stats
-
Apr 16, 1985
Grant Date -
N/A
app pub date -
Mar 26, 1982
filing date -
Mar 28, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A continuously variable V-belt transmission comprises a hydrodynamic transmission unit including a lock-up means. A switch valve is provided which is responsive to fluid pressure in a cylinder chamber of a drive pulley, which fluid pressure being indicative of the reduction ratio of a continuously variable V-belt transmission unit. The lock-up means is engaged in response to the state of the switch valve to lock the hydrodynamic transmission unit when the reduction ratio is small. The switch valve may be responsive to stator reaction of a stator of the hydrodynamic transmission unit so that the lock-up means is released as long as the hydrodynamic transmission unit multiply torque.
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