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:
Sep. 19, 2006
Filed:
Aug. 20, 2004
Jürgen Fritsch, Regensburg, DE;
Rainer Hirn, Neutraubling, DE;
Diego Valero-bertrand, Regensburg, DE;
Michael Wirkowski, Regensburg, DE;
Jürgen Fritsch, Regensburg, DE;
Rainer Hirn, Neutraubling, DE;
Diego Valero-Bertrand, Regensburg, DE;
Michael Wirkowski, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In fuel reservoir injection systems also known as common rail fuel-injection systems () for motor vehicles the problem exists that for a defined quantity of fuel that is about to be injected it is necessary to take into account not only the predominant pressure of the fuel but also its temperature. It is difficult to install and use a temperature sensor to detect the fuel temperature. The invention therefore proposes a method and a device for determining the temperature (T) from the pressure (P) measured by the pressure sensor () and the sound-propagation velocity (V) of a shock wave triggered at the moment of injection.