Robert Boschgmbh

Gunter Bofinger

Heinz Nothdurft

Claus Maier

Gerald Hofer

Karl Konrath

Werner Faupel

Karl-Friedrich Russeler

Helmut Simon

Josef Hain

Mohammad-Ali Khosrawi

Manfred Narr-Hess

Gerhard Reichan

Hubertus Zedler

Remy Schmitt

Fuel injection pump

Fuel injection pump for internal combustion engines

An rpm governor for internal combustion engines having two cooperating levers pivotable about a shaft and engaged at one end by at least one governor spring and, counter to this force, by at least one rpm signal transducer is proposed. An idling spring engages one of the two levers, and its other end is adjustably disposed in the governor housing. As a result, a very fine idling adjustment is attainable, independently of the conventional governor springs, and so a 'hole' in the engine torque during a transition from overrunning to loaded operation is avoided.

RPM governor for fuel injection pumps

A fuel injection pump for an internal combustion engine is proposed having an adjustment piston for the adjustment of the onset of the injection, on which an rpm-proportional fuel pressure determined by a pressure control valve and a pressure valve placed behind it and controllable in dependence on temperature acts. An adjustment device controls a full load stop for the limitation of the full-load fuel maximally injected by the fuel injection pump. The adjustment device has a movable piston for this purpose disposed movably in a work bore. The circumference of the piston is formed as a cam and is scanned by a scanner determining the position of the full load stop. The movable piston is acted on one side by the fuel pressure in the suction chamber and on the other side by a spring and by the fuel pressure between the pressure control valve and the pressure valve. This results in a compensation of the fuel pressure force at the movable piston, which is caused by the pressure valve.

The pump piston in a fuel injection pump is provided with longitudinal grooves which provide communication between the pressure chamber and the fuel supply chamber. An annular groove on the pump piston connects the longitudinal grooves so that communication between the pressure chamber and the fuel supply chamber is interrupted only after onset of the axial pressure stroke regardless of prior piston rotation.

Fuel injection pump for an internal combustion engine

Growing community of inventors

Vaihinger, Germany

Gunter Bofinger