Patent · US Expired

Seat/slide valve with pressure-equalizing pin

US6837451B2 · kind B2 · utility

6Cited by

9References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Nestor Rodriguez-Amaya · Stuttgart, DE
Achim Brenk · Remchingen, DE
Wolfgang Klenk · Besigheim, DE
Uwe Gordon · Markgröningen, DE
Manfred Mack · Riedlingen, DE
Hubert Greif · Markgröningen, DE

Key dates

Filing date	Mar 12, 2002
Grant date	Jan 4, 2005
Priority date	—
Expiry date	Mar 12, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86686
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and having a second switching position, in which the injection nozzle is in communication with a high-pressure fuel reservoir. To improve the function and quality of the injection, the 3/2-way valve includes a force-balanced control piston, and the control edge of the control piston is pressure-equalized by means of a blind bore.

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