DRUCKENTLASTUNGSVENTIL FUER KRAFTSTOFFEINSPRITZPUMPEN

摘要

A pressure relief valve (16) for fuel injection pumps has a relief piston (28) that plunges into a guiding bore (19) of a valve support (21) in order to relieve the pressure in the pressure duct. The valve element (17) has recesses (25) upstream or downstream of the relief piston (28), available to the fuel duct when the valve is open and arranged in a shaft (18) that guides the movable valve element (17) in the guiding bore (19). The lands (27) of the shaft (18) that delimit the recesses (25) merge directly into the relief piston (28), so that the front walls of the recesses (25) form at the same time the front wall of the relief piston (28).