Fuel injector

US6095118A · 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
• Gerd Loesch · Stuttgart, DE
• Sandro Soccol · Bietigheim-Bissingen, DE

Key dates

• Filing date: Mar 24, 1999
• Grant date: Aug 1, 2000
• Expiry date: Mar 24, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/3809
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection system for internal combustion engines is proposed, in which with the aid of a high-pressure pump fuel is pumped at high pressure into a high-pressure fuel reservoir (6), from which electrically controlled fuel injection valves (9) are supplied. The pressure in the high-pressure fuel reservoir is maintained in such a way that a first pump element (16) pumps fuel into the high-pressure reservoir with a variable pumping quantity, and a second pump element (17) as needed pumps a constant high-pressure fuel quantity into the high-pressure reservoir. A simple, economical system is thus obtained for furnishing high fuel pressure for injection by the fuel injection system (FIG. 2).