Device for controlling preliminary injection

US4289098A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Norberg · Stuttgart, DE
• Richard Kinzel · Stuttgart, DE

Key dates

• Filing date: Jul 31, 1979
• Grant date: Sep 15, 1981
• Expiry date: Jul 31, 1999

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M45/04
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

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.