Fuel injection system for internal combustion engines

US5839414A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Horst Klinger · Ludwigsburg, DE
• Uwe Kuhn · Riederich, DE
• Bernd Rosenau · Asperg, DE
• Peter Traub · Stuttgart, DE
• Thomas Goettel · Schwaikheim, DE
• Gerd Loesch · Stuttgart, DE
• Sandro Soccol · Bietigheim-Bissingen, DE
• Regis Blanc · Montbrison, FR
• Andre Fromentoux · Mions, FR
• Francois Rossignol · Montréal, CA

Key dates

• Filing date: Jul 25, 1997
• Grant date: Nov 24, 1998
• Expiry date: Jul 25, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7838
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection system for internal combustion engines, having a high-pressure pump, whose pump work chamber can be made to communicate on the intake side with a fuel tank via a supply line and on the compression side with a common rail via a high-pressure line, from which common rail a plurality of injection lines lead away to the individual injection valves, and having one pressure valve each in the supply line and the high-pressure line, by way of which a return flow of fuel out of the pump work chamber into the supply line and out of the high-pressure line into the pump work chamber is prevented. The pressure valve of the supply line and the pressure valve of the high-pressure line are disposed in a common valve combination.