Patent ID: 6527670
Filing Date: 2003-03-04
Classification: F16H,Y10S,Y10T

Abstract:
An electronic hydraulic control device of an automatic automobile transmission with frictional clutches or brakes (A, B, C, D, E) that can be hydraulically engaged and released to shift individual gears, whose actuators have clutch valves (24, 25) associated with them, with an electronic control device (32) by which a plurality of electrically actuated solenoid valves (11, 12, 15, 16) controlling the actuators can be adjusted depending on operating parameters of the automobile transmission and of a drive motor as well as of a selector lever device, and with a parking mechanism connected with a spring(19) which disengages hydraulically through the control device or manually and which can be locked by the spring(19), wherein by manually unlocking the parking mechanism a parking mechanism valve (17) is hydraulically actuated thereby selecting and engaging a forward gear, wherein the parking mechanism valve (17) is connected to a manual unlocking device (36) and is held in a zero pressure state by the spring (19) so that pressure applied to the parking mechanism valve (17) is not passed on to a hydraulic drive control.