Hydraulically controlled dosing valve for high pressure fuel pump of internal combustion engine of motor vehicle, has closing element removed from valve seat during decrease in pressure in control space

摘要

The valve (1) has a hollow cylinder for receiving a control piston (2) that is movable by pressure obtained in a control space (3) and force of a pressure spring (9). A pressure relief line (4) is guided through the control space that exits through an outlet opening of a hollow cylinder. A retaining throttle (11) is formed by the outlet opening, and a valve seat (10.2) of an exhaust valve (10) is turned towards the piston. A closing element (10.1) is removed from the valve seat during decrease in pressure in the control space.