Patent · US Expired

Pressure control valve, especially for high pressure diesel pumps of injection devices of motor vehicles

US7013877B2 · kind B2 · utility

0Cited by

10References

7Claims

0Family size

Assignee

Hydraulik-Ring GmbH · DE

Inventors

Alfred Trzmiel · Gräfenberg, DE
Rolf Neuhaus · Lohr, DE
Friedrich Zapf · Karlstadt, DE

Key dates

Filing date	Apr 8, 2003
Grant date	Mar 21, 2006
Priority date	—
Expiry date	Apr 8, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16K31/004
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A pressure control valve for a high-pressure diesel pump of an injection device of a motor vehicle has a valve body and a piezo drive with a tappet securing the valve body in a closed position. The valve body in the closed position closes off a bore, containing a medium under pressure, relative to a pressure-relief bore. The piezo drive has at least one piezo element connected to the tappet. The piezo drive is mounted in a pump housing of the high-pressure diesel pump. A screw element receives the piezo drive and is used to screw the piezo drive into the mounting chamber of the pump housing.

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