Patent ID: 6578685
Filing Date: 2003-06-17
Classification: B60W,F16D

Abstract:
A hydraulic coupling for use in a motor vehicle driveline, comprising:first and second rotary members; a transfer clutch operatively connected between said first and second rotary members; a piston disposed in a piston chamber and actuable to engage said transfer clutch; a pump cover assembly fixed to said second rotary member; a hydraulic pump in fluid communication with a sump containing hydraulic fluid, said hydraulic pump being retained in said pump cover assembly and having a first pump member fixed for rotation with said cover assembly and a second pump member fixed for rotation with said second rotary member such that relative rotation between said first and second pump members generates said pumping action; a flow path for supplying said hydraulic fluid from said hydraulic pump to said piston chamber; a control valve located in fluid communication with said flow path for regulating the pressure of said hydraulic fluid supplied to said piston chamber; a sensor for detecting a physical property of said hydraulic fluid; and a traction control module for controlling actuation of said control valve in response to sensor signals from said sensor.