Patent · US Expired

Throttle valve especially for high-pressure diesel pumps of injection devices of motor vehicles

US6910465B2 · kind B2 · utility

1Cited by

6References

20Claims

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	Jun 28, 2005
Priority date	—
Expiry date	May 28, 2023

Classification

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

Abstract

A throttle valve for a high-pressure diesel pump of an injection device of a motor vehicle has at least one piston movable by a medium under pressure against a counter force and has at least one throttle location. A prestage valve in the form of a pressure control valve having a valve body is provided. The pressure control valve comprises a piezo drive. The piezo drive has at least one piezo element. A tappet is connected to the at least one piezo element. The tappet secures the valve body in a closing position. A bushing is provided in which the piston is slidably guided. The bushing has at least one annular groove into which at least one control bore opens.

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