The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2005
Filed:
Jun. 04, 2003
Andreas Farth, Erlangen, DE;
Andreas Voigt, Regensburg, DE;
Matthias Spickenreuther, Obertraubling, DE;
Andreas Farth, Erlangen, DE;
Andreas Voigt, Regensburg, DE;
Matthias Spickenreuther, Obertraubling, DE;
Siemens Aktiengesellschaft, Munich, DE;
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, p, p) are applied to the injection nozzle the test forces (Fz, F, F) 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).