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. 13, 2004
Filed:
Jun. 13, 2003
Applicant:
Inventors:
Ian G. Stahl, Royal Oak, MI (US);
Alfred E. Spitza, Jr., Brighton, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P 5/152 ;
U.S. Cl.
CPC ...
F02P 5/152 ;
Abstract
False spark knock detection is minimized for a displacement on demand engine having activated and deactivated modes. The engine is operated in the activated mode. Knock detection is performed on all cylinders of the engine during the activated mode. The engine is operated in the deactivated mode. Knock detection is performed on activated cylinders during the deactivated mode. Knock detection is disabled for deactivated cylinders during the deactivated mode.