Patent ID: 7611002
Filing Date: 2009-11-03
Classification: F16H

Abstract:
1. An apparatus ( 100 ) for operating a hydrodynamic torque converter ( 1 ) and a corresponding converter-bypass clutch ( 2 ) of a transmission, the apparatus comprising: a solenoid valve (WDV) having a valve stem assembly (WDV_S) with a surface which reacts to a pilot pressure (p_VS), the solenoid valve (WDV) being controlled by the pilot pressure (p_VS) which biases a spring arrangement (WDV_F); a variable pressure control valve (WKV) having a valve stem assembly (WKV_S) with a surface which reacts to the pilot pressure (p_VS), the variable pressure control valve (WKV) being controlled by the pilot pressure (p_VS) which biases spring arrangement (WKV_F), the solenoid valve (WDV) and the pressure control valve (WKV) being operably connected; at least one of the one or more of the control lines (L a second supply aperture (WDV_ a surface between a control space ( a flow return side of the torque converter ( a fourth supply aperture (WKV_ the third pilot pressure aperture (WKV_