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. 26, 2005
Filed:
Sep. 17, 2003
Applicants:
Ronald M. Wozniak, Auburn Hills, MI (US);
John S. Jackson, Troy, MI (US);
Inventors:
Ronald M. Wozniak, Auburn Hills, MI (US);
John S. Jackson, Troy, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P005/00 ;
U.S. Cl.
CPC ...
Abstract
Preignition in an engine is prevented by identifying engine conditions that relate to autoignition. If one or more of the engine conditions exceed a threshold, a controller retards the spark in the engine. The controller detects whether autoignition occurs in the engine due to the retarded spark advance. If autoignition is detected, the controller corrects the one or more engine conditions by at least one of reducing a throttle opening, cutting of fuel to a cylinder, adjusting a camshaft phase, and storing a diagnostic code.