Dispositif d'actionnement hydraulique pour l'actionnement de couplages, en particulier dans une boîte de vitesses à plusieurs embrayages pour un véhicule automobile

摘要

The device (10) has two pressure circuits (16,16) that are hydraulically connected with pump (14) and a reservoir (18) from which the hydraulic fluid is conveyed by the pump to the pressure circuit. The pressure circuit comprises a non-return valve (20,20) blocking in the direction of the pump, an electromagnetically actuable proportional throttle valve (22,22). The pump drive and proportional throttle valve are electrically connected with a control unit which co-ordinates the electrical activation of the pump drive and the proportional throttle valves.