Patent · US Expired

Fuel injection pump

US6413054B1 · kind B1 · utility

4Cited by

8References

21Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Geiger · Plankstadt, DE
Walter Fuchs · Stuttgart, DE
Hubert Greif · Markgröningen, DE
Stephan Jonas · Gerlingen, DE

Key dates

Filing date	Jul 24, 2000
Grant date	Jul 2, 2002
Priority date	—
Expiry date	Jul 24, 2020

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2001/186
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injection pump having a cam drive and an injection adjuster piston, acting on the cam drive and serving the purpose of an injection onset adjustment. The injection adjuster piston on a face end encloses at least one pressure chamber that via a control valve is either made to communicate with a pressure source or a relief line or can be closed entirely. The control valve is actuated by an a proportional electromagnet. As a result, only a little adjusting medium is required, to obtain a high efficiency of the injection onset adjustment, and advantageously the injection adjuster piston is stressed only axially, and frictional forces on the circumference of the injection adjuster piston are thus avoided.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.