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:
May. 13, 2008
Filed:
Oct. 25, 2006
Nils Sandmann, Gruenstadt, DE;
Noboru Takahashi, Frankfurt am Main, DE;
Douglas E. Trombley, Eppstein-Bremthal, DE;
Jeffrey J. Allen, Bloomfield Hills, MI (US);
Dietmar Mueller, Riedstadt, DE;
Thomas Wagner, Trebur, DE;
Toshio Ichimasa, Zama, JP;
Yoshiki Torii, Sagamihara, JP;
Nils Sandmann, Gruenstadt, DE;
Noboru Takahashi, Frankfurt am Main, DE;
Douglas E. Trombley, Eppstein-Bremthal, DE;
Jeffrey J. Allen, Bloomfield Hills, MI (US);
Dietmar Mueller, Riedstadt, DE;
Thomas Wagner, Trebur, DE;
Toshio Ichimasa, Zama, JP;
Yoshiki Torii, Sagamihara, JP;
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A method of diagnosing a fuel injector of an engine system as contaminated is provided. The method comprises: recording a first fuel injection quantity; commanding a fuel rail pressure high; recording a second fuel injection quantity while the fuel rail pressure is high; and diagnosing the fuel injector as contaminated if the first fuel injection quantity is greater than the second fuel injection quantity.