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:
Feb. 25, 2014
Filed:
Mar. 23, 2011
Philippe S. Farah, Maisons-Laffitte, FR;
Ronald J. Krefta, Noblesville, IN (US);
Brent J. Wahba, Victor, NY (US);
Eugene A. Kobos, Henrietta, NY (US);
Kevin R. Keegan, Hilton, NY (US);
Philippe S. Farah, Maisons-Laffitte, FR;
Ronald J. Krefta, Noblesville, IN (US);
Brent J. Wahba, Victor, NY (US);
Eugene A. Kobos, Henrietta, NY (US);
Kevin R. Keegan, Hilton, NY (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A system and method for controlling an injection time of a fuel injector. The system includes a drive circuit configured to output a drive signal having a pulse width, wherein the injection time is influenced by the pulse width and a closing electrical decay of the fuel injector. A controller is configured to determine the closing electrical decay of the fuel injector and adapt the pulse width based on the closing electrical decay to control the injection time. The closing electrical decay includes a closing response. The controller determines the closing response based on an injector signal, such as a coil voltage of the fuel injector. By determining the closing response, the pulse width can be adjusted to compensate for fuel injector part-to-part variability, fuel injector wear, variations in fuel pressure received by the fuel injector, dirt in the fuel injector, and the like.