Overflow valve, in particular for use in a fuel injection system, high-pressure pump and fuel injection system

摘要

The invention relates to an overflow valve (7), in particular for use in a fuel injection system, comprising a piston housing (11) displaceably arranged in a valve housing (10) provided with inlet port (6) and return port (9) and longitudinally displaceable within a cylinder space (21) as a valve element with the return port (9) cooperates, and the rear of at least one in a spring chamber (13) of the valve housing (10) accommodated valve spring (12) is acted upon to generate the switching pressure, wherein the inlet port (6) with a filter element (14 ) is provided, wherein in addition to the through a channel (6, 21, 9) and the filter element (14) extending main volume path (H) a parallel thereto by a bypass (15, 17, 21) extending Bypassvolumenpfad (B) is provided which Seen in the flow direction in front of the filter element (14) from the channel (6, 21, 9) of the main volume path (H) branches off and after the filter element (14) but before the Kolbenein unit (11) again in the channel (6, 21, 9) of the main volume path (H) opens.