Patent ID: 9476431
Filing Date: 2016-10-25
CPC Classification: F15B,F16H

Claim Text:
1. An actuating device for hydraulic actuation of one or more setting elements in a motor vehicle transmission, comprising a pump, which has an electric pump drive and the pumping direction of which is reversible, at least one double-acting piston-cylinder arrangement, which is hydraulically connected with the pump and the piston of which is operatively connected with the setting element, and a reservoir for hydraulic fluid, from which the hydraulic fluid can be conveyed by the pump to the piston-cylinder arrangement in order to hydraulically load the piston thereof on one effective surface side or other effective surface side of the piston for movement of the setting element depending of the respective pumping direction, characterized in that the or each piston-cylinder arrangement is functionally associated with a detent device with a blocking element, which is spring-biased into a blocking position preventing movement of the setting element and which is movable by an electrically activatable actuator against the spring bias from the blocking position to a release position permitting movement of the setting element, wherein the pump drive and the actuator are electrically connected with a control unit which co-ordinates the electrical activation of pump drive and actuator, wherein said control unit activates said actuator before said control unit activates said electric pump drive to hydraulically load the piston of the piston-cylinder arrangement for permitting and providing movement of the setting element, and the detent device is mounted at the piston-cylinder arrangement, wherein the blocking element co-operates with blocking sections at the piston.