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:
Apr. 20, 2021
Filed:
Oct. 08, 2018
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Yongjie Zhu, Troy, MI (US);
Jun-mo Kang, Ann Arbor, MI (US);
Chen-fang Chang, Bloomfield Hills, MI (US);
David J. Brooks, Troy, MI (US);
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/11 (2006.01); F02D 41/00 (2006.01); F02D 41/22 (2006.01); F02D 35/02 (2006.01);
U.S. Cl.
CPC ...
G01M 15/11 (2013.01); F02D 35/023 (2013.01); F02D 41/0097 (2013.01); F02D 41/222 (2013.01); F02D 2200/1015 (2013.01);
Abstract
A method of detecting misfire in a combustion engine of a motor vehicle engine includes measuring a speed of a crankshaft, calculating a modal coefficient for each cylinder of the combustion engine, and indicating a misfire for at least one of the cylinders based on the calculation of the modal coefficients.