| 摘要 |
<p>The invention relates to a clutch system for producing and interrupting a force flow between an engine and transmission of a motor vehicle, having a clutch (2) which, in the non-actuated state, is situated in a disengaged operating state, but can be moved into an engaged operating state by means of at least one clutch actuator (i) which can be pressurized pneumatically or hydraulically, and having one or more valves which are arranged in a pressure line system of a control valve arrangement (18) and regulate the volume flow rate of the pressure medium, which valves can be electrically activated by an electronic control and regulating unit (5). In order, in the event of a failure of the voltage supply, to ensure firstly the transmission of the full clutch torque or of a defined part thereof while travelling and while no shift takes place (gear engaged), and secondly to prevent the automatic engagement or closure of the clutch when the motor vehicle is stationary, the engine is running and the transmission gear is engaged, it is provided that the valves (3a, 3a', 3b; 4a, 4a', 4b; 9) or the valve (10) are embodied such that, in the event of a failure of the voltage supply, and accordingly a failure of the activation of the valves (3a, 3b; 4a, 4b; 9) or of the valve (10) by means of the electronic control and regulating unit (5), the presently set operating state of the clutch (2), that is to say the disengaged or engaged operating state, is maintained.</p> |
