Robert Boschgmbh

Matthias Schmidl

Robert Reitsam

Thomas Lettner

Bernhard Rettenbacher

A fuel injection system having a fuel reservoir, a high-pressure fuel pump by which fuel is pumped into the fuel reservoir as a function of engine operating parameters, a prefeed pump by which fuel is pumped from a fuel tank to the intake side of the high-pressure fuel pump, a fuel metering device for adjusting the fuel quantity pumped into the fuel reservoir by the high-pressure fuel pump, and at least one injector, communicating with the fuel reservoir, for fuel injection to the engine. The metering device is disposed between the fuel tank and the intake side of the prefeed pump. The high-pressure fuel pump has a drive region, which for the sake of its lubrication can be made to communicate with the outlet of the prefeed pump, via a pressure valve that opens towards the drive region.

Fuel injection system for an internal combustion engine

An internal gear pump has a housing, a toothed ring provided with inner teeth, a bearing ring supporting the toothed ring in the housing rotatably about a rotary axis, a toothed gear provided with outer teeth and engaging with the toothed ring, the toothed gear being rotatable in the housing about a rotary axis, the toothed gear or the toothed ring being rotatably driven, the rotary axis of the toothed ring being offset relative to the rotary axis of the toothed gear, and an adjusting device associated with the bearing ring for moving the bearing ring in a radial direction relative to the rotary axis of the toothed ring in the housing for an adjustment and for blocking it in an adjusted position.

Growing community of inventors

Gries, Austria

Matthias Schmidl