Patent ID: 7628261

Claim:
An apparatus ( 100 ) for operating a hydrodynamic torque converter ( 1 ) end a converter-bypass clutch ( 2 ) of a transmission apparatus, the apparatus comprising: a first line system ( 20 ) having a solenoid valve (WDV) and a variable pressure control valve (WKV), a valve stem assembly (WDV_S) of the solenoid valve (WDV) and a valve stem assembly (WKV_S) of the pressure control valve (WKV) being biased by a controllable pilot pressure (p_VS) counter to a spring arrangement (WDV_F, WKV_F), each of the solenoid valve (WDV) and the pressure control valve (WKV) having a plurality of control lines (L 1 to L 10 ) connected to control apertures (WDV_ 1 to WDV_ 8 and respectively WKV_ 1 to WKV_ 6 ), the control apertures connect to hydraulic lines (HL 3 , HL 4 , HL 6 , HL 8 , HL 9 ) of a hydraulic line system ( 22 ) for subjecting the torque converter ( 1 ) and the converter-bypass clutch ( 2 ) to hydraulic fluid from an area of remote ends of the control apertures (WDV_ 1 to WDV_ 8 WKV_ 1 to WKV_ 6 ) to an inlet and an outlet side of the torque converter ( 1 ) as well as to a piston chamber ( 27 ) of the converter-bypass clutch ( 2 ), the inlet and the outlet sides of the torque converter ( 1 ) only directly communicate with the solenoid valve (WDV), the piston chamber ( 27 ) of the converter by-pass clutch ( 2 ) is separated from a spent flow of the torque converter ( 1 ), and the spent flow of the torque converter ( 1 ) is directly connected to a spent flow control aperture (WDV_ 6 ) of the solenoid valve (WDV) via a hydraulic line system ( 22 ).