Gear shift actuator for shifting gears of a transmission

摘要

The gear ratio selector for a motor vehicle transmission has a first working piston (11) with two working surfaces (2,4), an auxiliary piston (6) and a pressure regulating valve (7). The pressure regulating valve adjusts the pressure for the second piston working face. The first piston working surface, and the pressure regulating valve are connectable to the system pressure by a closure valve (8).