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:
Mar. 06, 2007
Filed:
Oct. 27, 2005
Gregory F. O'daniel, Davisburg, MI (US);
David S. Mathews, Howell, MI (US);
Douglas J. Moening, Farmington, MI (US);
Tameem K. Assaf, Milford, MI (US);
Gregory F. O'Daniel, Davisburg, MI (US);
David S. Mathews, Howell, MI (US);
Douglas J. Moening, Farmington, MI (US);
Tameem K. Assaf, Milford, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A cylinder misfire control system for a displacement on demand (DOD) engine that is operable in an activated mode and a deactivated mode includes a sensor that is responsive to rotation of a crankshaft of the engine and a first module that calculates a time derivative based on a first time period associated with a first deactivated cylinder and a second time period associated with a second deactivated cylinder. The first and second time periods are based on the rotation of the crankshaft. A second module detects a misfire occurrence in an activated cylinder based on the time period derivative.