Patent ID: 8151965

Claim:
A clutch arrangement responsive to a speed difference for the transmission of torque in a powertrain of a motor vehicle, comprising: an input element and an output element that are rotatable relative to one another; a friction clutch that couples the input element to the output element based on a hydraulic pressure that prevails in a pressure space; a pump with a first pump part that is rotationally fixedly connected to the input element and a second pump part that is rotationally fixedly connected to the output element, wherein the pump is driven by rotation of the input element and the output element relative to one another, a suction side of the pump being connected to a low pressure space, and a pressure side of the pump being connected to the pressure space; and an orifice with a substantially temperature independent leakage characteristic arranged at a leakage line that leads from the pressure space to the low pressure space and extends parallel to the pump, the orifice having a leakage rate that approximately corresponds to a leakage rate of the pump at an operating temperature.