Fuel injection device for internal combustion engines

US6196191A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Rembold · Stuttgart, DE
• Andreas Kellner · Birkenau, DE

Key dates

• Filing date: Jun 22, 1999
• Grant date: Mar 6, 2001
• Expiry date: Jun 22, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B49/246
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection system for internal combustion engines, having a high-pressure fuel pump which fills a high-pressure collection chamber with high fuel pressure. Injection lines lead away from the high pressure collection chamber to the individual injection valves. A prefeed pump that feeds fuel from a tank via a low-pressure line system into a work chamber of the high-pressure pump, and at least one control valve controls the high-pressure pumping quantity of the high-pressure pump. Control valves are inserted into the low-pressure line system that adjust the fuel filling flow into the work chamber of the high-pressure pump to the fill volume actually required for operation.