Patent · US Expired

Pressure booster for a fuel injection system

US6883498B2 · kind B2 · utility

5Cited by

3References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

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

Key dates

Filing date	May 10, 2002
Grant date	Apr 26, 2005
Priority date	—
Expiry date	May 10, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M59/105
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A pressure booster of a fuel injection system includes a displaceable piston unit (30a, 31a), which on one end can be subjected to pressure via a pressure booster chamber on the low-pressure side and on the other end has a pressure booster chamber on the high-pressure side for fuel compression. The piston unit has a further piston cross section, which is reduced compared to the first piston cross section provided for imposing pressure, for embodying a differential chamber that is connectable to a leak fuel line. At least one control conduit connects the pressure booster chamber on the low-pressure side to the differential chamber, whose opening is closed or opened as a function of the motion of at least parts of the piston unit.

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