Direction control valve for a windscreen cleaning device in a motor vehicle

摘要

The valve has an adjustable control piston (19) provided in a valve housing and impinged by a spring element (18) in a closed position closing a flow channel (8'). The piston is moved by pressurization of fluid against closing force of the element in an open position in which the channel is opened. Fluid is introduced into a pressure chamber (21) by a cylinder orifice (22) in the housing. A chamber is provided in a front side (20) of the piston. A closing stopper (23) closes an orifice in a closing position of the piston, where the stopper has a smaller surface than a front side surface.