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. 01, 2011
Filed:
Oct. 21, 2008
Mark H. Costin, Bloomfield Township, MI (US);
Timothy J. Hartrey, Brighton, MI (US);
Layne K. Wiggins, Plymouth, MI (US);
Bryan D. Lehman, Fenton, MI (US);
Roberto DE Paula, New Hudson, MI (US);
Joseph M. Stempnik, Warren, MI (US);
Mark H. Costin, Bloomfield Township, MI (US);
Timothy J. Hartrey, Brighton, MI (US);
Layne K. Wiggins, Plymouth, MI (US);
Bryan D. Lehman, Fenton, MI (US);
Roberto De Paula, New Hudson, MI (US);
Joseph M. Stempnik, Warren, MI (US);
Abstract
An air-per-cylinder (APC) security system for a vehicle comprises an APC determination module, an APC threshold determination module, and an APC diagnostic module. The APC determination module determines first and second APC values for first and second cylinders of an engine, respectively, based on mass airflow (MAF) into the engine. The APC threshold determination module determines an APC threshold based on the first APC value and a spark timing for the first cylinder. The APC diagnostic module selectively diagnoses a fault in the APC determination module when the second APC value is greater than a sum of the first APC value and the APC threshold.