High-pressure fuel pump with a pressure relief valve
AssigneeRobert Bosch GmbH
InventorsHelmut Rembold, Peter Ropertz, Victorio Toscano
Life of this patent
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Abstract
A high-pressure fuel pump with a pressure relief valve which has improved hydraulic properties and a reduced number of high-pressure sealing points.
Claims17
A high-pressure fuel pump (30) having a delivery chamber (60) delimited on one side by a piston (62) of the high-pressure fuel pump (30), the delivery chamber (60) being connected on the intake side via an intake valve (34) to a low-pressure fuel line (22) and on the pressure side via a high-pressure connection (63) to a high-pressure fuel line (42), wherein a check valve (44) and a pressure relief valve (56), connected parallel to the check valve (44), are provided between the delivery chamber (60) that is contained in a housing (58) and the high-pressure connection (63) that is connected to the housing (58) in a fluid-tight manner, both the check valve (44) and the pressure relief valve (56) having a center line disposed at approximately 90° to a center line of the piston (62), wherein the pressure relief valve (56) is contained in a blind hole bore (69) of the housing (58), and wherein the blind hole bore (69) starts from a chamber (68) delimited by the high-pressure connection (63) and the housing (58).
Dependencies are inferred from the claim text.