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:
Nov. 03, 2020
Filed:
Nov. 05, 2019
GM Global Technology Operations Llc, Detroit, MI (US);
J. Michael Gwidt, Brighton, MI (US);
Daniel P. Himes, West Bloomfield, MI (US);
Andrew M. Shaw, Fenton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of operating a fuel injector includes determining a fuel pressure and a total fuel mass Mto be injected per combustion cycle, defining first and second pulse widths PWand PWcorresponding to first and second commanded fuel masses CMand CMwherein CM+CM=M, actuating the injector for the first and second pulse widths, detecting an opening delay for the injector, and storing the opening delay. The method may further include increasing PWand decreasing PWby a predetermined amount, repeating selected steps until PWis less than or equal to a predetermined minimum pulse width, changing the fuel pressure by a predetermined pressure amount, cycling through selected steps until the fuel pressure reaches a predetermined target fuel pressure, and commanding the injector to open earlier than a normally commanded opening time by a lead time based on stored opening delay data.