Abstract: The invention relates to a high-pressure fuel pump (10) having a housing (12) in which a pressure-limiting valve (38) is arranged in a bore (36), wherein the bore (36) leads into an inflow volume (30) of a low-pressure inflow (22).

Abstract: A valve arrangement for a fuel injection system includes a first valve unit (42) having a first flow cross section (Q1) and a second valve unit (44) having a second flow cross-section Q2). The second valve unit includes at least two single valves (48), each of which has a single valve flow cross-section QE). The second flow cross-section (Q2) is formed by a sum of the single valve flow cross-sections (QE). A fuel injection system (10) incorporates such a valve arrangement (22).

Abstract: Various embodiments include a high-pressure port for a high-pressure fuel pump of a fuel injection system comprising: an outlet valve with an outlet valve element opening in a first direction and cooperating with an outlet valve seat to close the outlet valve; and a pressure-limiting valve with a pressure-limiting valve element opening in a second direction opposite the first direction and cooperating with a pressure-limiting valve seat to close the pressure-limiting valve. The outlet valve element comprises the pressure-limiting valve seat.

Abstract: Various embodiments may include a fuel pump for applying pressure to a fuel in a fuel injection system comprising: a housing with a pressure chamber; a fluid port for conducting fuel to and/or from the pressure chamber; a port receiving bore in the housing for receiving the fluid port; and a screw drive arranged in the internal bore of the fluid port, via which the fluid port can be acted on in order to be screwed into the port receiving bore. The fluid port has an internal bore fluidically connected to the pressure chamber. The fluid port is fastened in the port receiving bore with a screw connection.

Abstract: The present disclosure relates to internal combustion engines. Various embodiments may include a fuel injection system for an internal combustion engine comprising: a high-pressure fuel pump with a pressure chamber and a pump piston; a high-pressure region downstream of the pump piston; and a valve arrangement connecting the pressure chamber to the high-pressure region. The valve arrangement includes an outlet valve and a pressure-limiting valve. The outlet valve and the pressure-limiting valve are mounted in two separate receptacle bores in a common valve housing. The receptacle bores extend along a longitudinal axis of the valve housing. The valve housing defines a central flow bore. The receptacle bores are each fluidly connected to the central flow bore by a bore intersection.

Abstract: The invention relates to a high-pressure fuel pump (10) having a housing (12) in which a pressure-limiting valve (38) is arranged in a bore (36), wherein the bore (36) leads into an inflow volume (30) of a low-pressure inflow (22).