Robert Boschgmbh

Helmut Norberg

Karl Hofmann

Ewald Eblen

Werner Banzhaf

Richard Kinzel

Dieter Liedtke

Rolf J Giersch

Heinrich Faber

Fuel injection nozzle for internal combustion engines

The invention relates to a fuel injection system with a device for controlling the preliminary and principal injections wherein control is effected by intermediate relief of the injection pressure which includes a slide valve for exerting the control which is braked during its reverse movement before interrupting the connection between the pressure chamber of the injection nozzle and the delivery line leading to the injection pump to thereby make possible the relief of the pressure chamber toward the injection pump, i.e. to avoid dribbling.

Device for controlling preliminary injection

A fuel injection nozzle for preliminary and primary fuel injection, wherein the preliminary injection of fuel is effected by temporarily relieving the feed or delivery pressure. Control is accomplished by means of a control slide valve preferably arranged around the valve needle, at least a portion of the preliminary injection quantity being displaced by way of this control slide valve.

Fuel injection nozzle

Growing community of inventors

Stuttgart, Germany

Helmut Norberg