Patent · US Expired

Method for setting the nozzle opening pressure for an injection nozzle and arrangement for carrying out the method

US6976389B2 · kind B2 · utility

2Cited by

11References

16Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Andreas Farth · Erlangen, DE
Andreas Voigt · Regensburg, DE
Matthias Spickenreuther · Obertraubling, DE

Key dates

Filing date	Jun 4, 2003
Grant date	Dec 20, 2005
Priority date	—
Expiry date	Dec 1, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M45/04
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In order to set the nozzle opening pressure for an injection nozzle, in particular for a diesel injection nozzle, to an accuracy of around ±1%, the method provides that the injection needle is first pressed against the valve seat with a closing force (Fz), and then when two different test pressures (pU, p1, p2) are applied to the injection nozzle the test forces (Fz, F1, F2) effective on the injector needle are measured, with the pressure stage (A) being determined from the measured test forces and the test pressures applied, and finally using the pressure stage (A) a nozzle valve with a suitable valve spring force (Fv) is selected to correspond to the desired nozzle opening pressure (pD).

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