Pump nozzle for fuel injection in internal combustion engines

US4092964A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gerald Hofer · Diez, DE
• Franz Eheim
• Odon Kopse · Stuttgart, DE

Key dates

• Filing date: Dec 16, 1976
• Grant date: Jun 6, 1978
• Expiry date: Dec 16, 1996

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M61/205
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to improvements in a fuel injection nozzle for internal combustion engines having a mechanically driven transport piston and a coaxial slave piston slidably arranged in a cylinder, said pistons being arranged to enclose between them an equalizing chamber fed from a line carrying a low pressure fluid and with the line being closed by the boundary edge of the transport piston which faces the equalizing chamber, and more particularly to a structure wherein the fluid in said equalizing chamber as well as that in the pressure line extending to a pressure chamber arranged to receive a needle valve is controllable by means of said slave piston to terminate the fuel injection.