Fuel pump (10), in particular a high-pressure fuel pump of a common-rail fuel system, with a pump piston (13) guided in a pump cylinder (11), wherein in the region of a recess (12) of the pump cylinder (11), in which the pump piston (13) is guided, an uppe...

The present disclosure refers to a device and method for operating an internal combustion engine. The internal combustion engine may be configured to be operated in an operation mode in which fuel of a specific type injected into at least one combustion ch...

In a fuel supply pump, a fuel relief path relieves a part of fuel, which is supplied through a part of fuel supply path connected between a control valve and a compressing chamber of a pump element, into a slidably contact portion between a plunger of the ...

In an injection pump element 2, a communication route for communicating an injection pipe 3 connected to a fuel liquid outlet 212 and an inner peripheral surface of a plunger barrel 25 is formed by a purge passage 242 formed in a delivery valve seat 24, a ...