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:
Dec. 11, 2018
Filed:
Aug. 24, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
Chaitanya Sankavaram, Sterling Heights, MI (US);
Shiming Duan, Ann Arbor, MI (US);
Layne Wiggins, Dexter, MI (US);
Stephen Levijoki, Swartz Creek, MI (US);
Dean Sorrell, Rochester Hills, MI (US);
Todar Kuzmanov, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of conducting prognosis for an airflow management system for a combustion engine includes adjusting a throttle body valve position control signal in response to a detected airflow variation and monitoring an airflow variation compensation (AVC) value corresponding to a degree of adjustment of the control signal. The method also includes generating a throttle body coking severity metric based on at least a plurality of residual error values and the AVC value, and executing at least one response action based on the throttle body coking severity metric exceeding a predetermined threshold.