Patent ID: 9371872
Filing Date: 2016-06-21
CPC Classification: F16D

Claim Text:
1. A method for calibrating 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 proportional valve disposed between the pump and the housing for regulating a pressure of the hydraulic fluid in the housing, a controller controlling the proportional valve, a pressure sensor for measuring a pressure of the hydraulic fluid in the housing, the method comprising the steps of closing the clutch by sending a pressure profile with fill parameters from the controller to the proportional valve, recording a pressure signal of the hydraulic fluid, comparing the pressure profile with the pressure signal, determining whether at least one defined feature is in the pressure signal that is indicative of errors in the fill parameters, and, if said feature is determined in the pressure signal, modification of the pressure profile by changing at least one of the fill parameters.