Method and apparatus for prefill of wet clutches
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United States of America Patent
Stats
-
Aug 18, 2015
Grant Date -
Aug 14, 2014
app pub date -
Feb 12, 2014
filing date -
Feb 13, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and an apparatus for controlling a wet clutch are provided. The clutch comprises a pump, a piston, and a fluid conduit. The pump provides a housing with a hydraulic fluid. The piston is movably disposed in the housing and is movable into an extended position by a preloaded spring and into a retracted position by applying an engagement pressure on the piston by the hydraulic fluid. In the retracted position torque is transmittable through the clutch. The fluid conduit connects the pump and the housing. The method comprises the steps of prefilling the clutch by applying a prefill pressure on the piston, prefilling the fluid conduit line and the housing with the hydraulic fluid. The prefill pressure is lower than the engagement pressure required to move the piston into the retracted position.
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