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. 01, 2015
Filed:
Mar. 08, 2012
Method for determining the force conditions at the nozzle needle of a directly driven piezo injector
Applicants:
Michael Katzenberger, Regensburg, DE;
Robert Hoffmann, Ruhstorf/Rott, DE;
Simon Ruscheinski, Rain, DE;
Inventors:
Michael Katzenberger, Regensburg, DE;
Robert Hoffmann, Ruhstorf/Rott, DE;
Simon Ruscheinski, Rain, DE;
Assignee:
CONTINENTAL AUTOMOTIVE GMBH, Hannover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L 5/00 (2006.01); F02M 65/00 (2006.01); F02D 41/20 (2006.01);
U.S. Cl.
CPC ...
F02M 65/001 (2013.01); F02D 41/2096 (2013.01); F02D 2041/2051 (2013.01); F02D 2200/063 (2013.01);
Abstract
A method is disclosed for determining the force acting on the nozzle needle of a directly driven piezo injector, in which an electrical voltage is built on the piezo actuator which drives the nozzle needle by means of a charging process. After the charging process has ended, the voltage at the piezo actuator is measured again. A voltage gradient is determined from consecutive voltage values. Conclusions of the force acting on the nozzle needle are drawn from the voltage gradients.