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:
Aug. 03, 2010
Filed:
Feb. 24, 2009
Wajdi B. Hamama, Whitmore Lake, MI (US);
Craig M. Sawdon, Williamston, MI (US);
Robert J. Horner, Dexter, MI (US);
Eric Ferch, Northville, MI (US);
Hamid M. Esfahan, Ann Arbor, MI (US);
Wajdi B. Hamama, Whitmore Lake, MI (US);
Craig M. Sawdon, Williamston, MI (US);
Robert J. Horner, Dexter, MI (US);
Eric Ferch, Northville, MI (US);
Hamid M. Esfahan, Ann Arbor, MI (US);
Abstract
An engine control system includes a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor. An intensity determination module determines an engine knock intensity based on one of a maximum of and an average of the FFT. A status determination module determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft.