Patent · US Expired

Fuel injection device for an internal combustion engine

US7850435B2 · kind B2 · utility

0Cited by

6References

21Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Peter Boehland · Erbach, DE
Godehard Nentwig · Stuttgart, DE
Michael Bauer · Unterföhring, DE

Key dates

Filing date	Oct 13, 2003
Grant date	Dec 14, 2010
Priority date	—
Expiry date	Nov 26, 2025

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M63/0225
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injection apparatus has a high-pressure pump and a fuel-supply pump that delivers fuel from a fuel tank to the high-pressure pump. The high-pressure pump has a housing with an internal chamber that contains a drive unit for at least one pump element having a pump piston driven by the drive unit and delimiting a pump working chamber into which fuel is supplied via an inlet during an intake stroke and from which fuel is displaced via an outlet into the reservoir during a delivery stroke of the pump piston. The fuel-supply pump delivers fuel into the internal chamber via a connection that contains a check valve which opens toward the internal chamber of the housing and the inlet of the pump working chamber is connected to the internal chamber.

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