Patent · US Expired

Dosing device for fluids, especially a motor vehicle injection valve

US7309032B2 · kind B2 · utility

13Cited by

11References

20Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Bernhard Fischer · Wien, AT
Bernhard Gottlieb · Munich, DE
Andreas Kappel · Höhenkirchen-Siegertsbrunn, DE
Enrico Ulivieri · Birkenfeld, DE

Key dates

Filing date	Oct 18, 2004
Grant date	Dec 18, 2007
Priority date	—
Expiry date	May 16, 2025

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/16
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An actuator (4) is connected, on one side, to a valve needle (3), and on the opposite side, to a hydraulic piston (6) pertaining to a hydraulic length compensator. A working chamber (5) is divided by a tight separating membrane (9), into an actuator chamber (10) containing the actuator (4) and a fluid chamber (11) which can be filled with the fluid to be dosed in a pressurized manner while the actuator chamber (10) and the hydraulic chamber (7) are filled with a hydraulic fluid. A base pressure can be produced in the hydraulic fluid by means of the pressure of the fluid to be dosed, which is transmitted through the separating membrane (9).

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