Fuel supply system for an internal combustion engine

US6840219B2 · kind B2 · 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: Nov 30, 2000
• Grant date: Jan 11, 2005
• Expiry date: Apr 8, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M55/007
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel delivery system for an internal combustion engine, having a fuel feed pump, which delivers fuel which is at pilot pressure to a high-pressure fuel pump that communicates on the high-pressure side with at least one injection valve, in order to deliver fuel at high pressure to the injection valve or valves. To prevent vapor bubble development in the high-pressure fuel pump, which impairs its pumping capacity and pressure generation, a coolant medium flow can be delivered to the high-pressure fuel pump via at least one coolant conduit, in order to keep the temperature (THDP) of the high-pressure fuel pump below a critical operating temperature (Tk1).