Patent · US Expired

Fuel injection system which uses a pressure step-up unit

US6453875B1 · kind B1 · utility

33Cited by

8References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Bernd Mahr · Plochingen, DE
Martin Kropp · Ditzingen, DE
Hans-Christoph Magel · Pfullingen, DE
Wolfgang Otterbach · Stuttgart, DE

Key dates

Filing date	Feb 21, 2001
Grant date	Sep 24, 2002
Priority date	—
Expiry date	Feb 21, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/21
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injection system has a pressure step-up unit, disposed between a pressure storage chamber and a nozzle chamber, whose pressure chamber communicates with the nozzle chamber via a pressure line. A bypass line connected to the pressure storage chamber is also provided. The bypass line communicates directly with the pressure line. The bypass line can be used for pressure injection and is disposed parallel to the pressure chamber, so that the bypass line is open regardless of the motion and position of a displaceable piston element in the pressure step-up unit. This enhances the flexibility of injection.

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