Injection system for internal combustion engines with improved starting properties

US6772738B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Rembold · Stuttgart, DE
• Klaus Joos · Walheim, DE
• Jens Wolber · Gerlingen, DE
• Thomas Frenz · Nördlingen, DE
• Markus Amler · Rutesheim, DE
• Hansjoerg Bochum · Leinfelden, DE
• Hans-Peter Harnisch · Cadolzburg, DE
• Peter Ropertz · Oberriexingen, DE
• Klaus Lang · Munster, DE
• Wolfgang Saatmann · Bengaluru, IN

Key dates

• Filing date: Sep 9, 2002
• Grant date: Aug 10, 2004
• Expiry date: Sep 15, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/60
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An injection system for internal combustion engines is proposed, in which once the engine has been turned off, a pressure equalization is established between the intake side and the pressure side of the high-pressure fuel pump. This prevents uncombusted fuel from reaching the combustion chambers of the engine. The pressure prevailing on the pressure side and the intake side when the engine is off furthermore assures that vapor bubbles cannot form, and this makes starting the engine easier.