Common rail for internal combustion engines comprises a mechanical/hydraulic pressure-reducing valve consisting of two valve units connected via a throttling port

摘要

Common rail for internal combustion engines comprises a mechanical/hydraulic pressure-reducing valve consisting of two valve units (27, 28) connected via a throttling port (33) arranged in between. The throttling port forms a first valve seat (35) for the first valve unit (27) on its end facing toward the first valve unit and a second valve seat (34) for the second valve unit on its other end facing toward the second valve unit. A sealing element (40) of the second valve unit interacting with the second valve seat is impinged upon by the rail pressure when the first valve unit is opened via the throttling port and against the resistance of a spring (42). Preferred Features: The throttling port has a conical expansion on each end forming the two valve seats.