Method for reducing the fuel pressure in a non-return fuel supply system

US6655360B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Joos · Walheim, DE
• Jens Wolber · Gerlingen, DE
• Thomas Frenz · Nördlingen, DE
• Hansjoerg Bochum · Leinfelden, DE
• Markus Amler · Rutesheim, DE

Key dates

• Filing date: Apr 23, 2002
• Grant date: Dec 2, 2003
• Expiry date: May 5, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/3872
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for reducing the fuel pressure in a return-free fuel supply system of an internal combustion engine to a desired pressure value. At least one fuel pump is mounted in the fuel supply system. In order to be able to reduce the fuel pressure in the fuel supply system in a simple manner without additional pressure release valves, the suggestion is made that the fuel supply system and the internal combustion engine be operated in a pressure-reduction mode wherein at least one fuel pump of the fuel supply system is so controlled (open loop and/or closed loop) that the desired pressure value is adjusted in the fuel supply system. The fuel supply system is preferably configured as a common-rail storage injection system for a direct-injecting internal combustion engine.