Hydraulic transmission actuator

摘要

A hydraulic transmission actuator has a piston/cylinder unit in which an actuating piston longitudinally displaceably arranged in the cylinder housing divides the cylinder chamber into at least two pressure chambers which can be acted upon by hydraulic oil by way of control conduits. A piston rod is connected with the actuating piston, and a sealing element is arranged on the actuating piston. The sealing element seals off the two pressure chambers from one another. The diameter of the cylinder housing is locally reduced for increasing the radial contact pressure force of the sealing element with respect to the interior cylinder wall.