Fuel injection system for direct injection internal combustion engine

US6971587B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Boehland · Erbach, DE
• Sebastian Kanne · Stuttgart, DE

Key dates

• Filing date: Sep 6, 2002
• Grant date: Dec 6, 2005
• Expiry date: Feb 14, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/00
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection system for an internal combustion engine with direct injection includes a fuel injection device which can inject the fuel directly into a combustion chamber of the engine has a valve element bordering on a work chamber, and the position of the valve element depends on the pressure in the work chamber. A pressure booster piston borders on a control chamber on one side and on a high-pressure chamber on the other. A fuel supply can subject the control chamber to various pressures. The pressure booster piston is integrated with the fuel injection device and that the high-pressure chamber is integrated with the work chamber.