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:
Jul. 02, 2013
Filed:
Oct. 06, 2010
Wajdi B. Hamama, Whitmore Lake, MI (US);
Craig M. Sawdon, Williamston, MI (US);
Eric B. Ferch, Northville, MI (US);
Matthew David Defever, Farmington Hills, MI (US);
Hillary L. Broadus, Commerce Township, MI (US);
Wajdi B. Hamama, Whitmore Lake, MI (US);
Craig M. Sawdon, Williamston, MI (US);
Eric B. Ferch, Northville, MI (US);
Matthew David Defever, Farmington Hills, MI (US);
Hillary L. Broadus, Commerce Township, MI (US);
Abstract
A knock detection system for an engine includes an intensity module, a knock threshold module, and a detection module. The intensity module determines an engine vibration intensity during a first period of engine operation. The knock threshold module determines a knock threshold based on an ethanol concentration in a fuel supplied to the engine. The detection module determines whether engine knock has occurred during the first period by comparing the knock threshold and the engine vibration intensity.