Patent ID: 9109645
Filing Date: 2015-08-18
Classification: F16D

Abstract:
1. A method for controlling a wet clutch, the clutch comprising: a pump for providing a housing with a hydraulic fluid, a piston being movably disposed in the housing, the piston being 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, wherein in the retracted position torque is transmittable through the clutch, a fluid conduit connecting the pump and the housing, the method comprising the steps of prefilling the clutch by applying a prefill pressure on the piston, thereby prefilling the fluid conduit line and the housing with the hydraulic fluid, the prefill pressure being lower than the engagement pressure required to move the piston into the retracted position, and providing a controller for controlling the pressure applied to the piston by taking into account at least one of a temperature of a transmission fluid, a radial pressure distribution of the transmission fluid inside a clutch housing affected by a rotational speed of the clutch, and a time between shifts.