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:
Feb. 09, 2010
Filed:
Jun. 07, 2007
Kenneth P. Degroot, Macomb Township, MI (US);
Jeffrey P. Wuttke, Sterling Heights, MI (US);
Gerald Lee Kennie, Marysvlle, MI (US);
Dennis W. Fett, Clinton Township, MI (US);
Kenneth P. DeGroot, Macomb Township, MI (US);
Jeffrey P. Wuttke, Sterling Heights, MI (US);
Gerald Lee Kennie, Marysvlle, MI (US);
Dennis W. Fett, Clinton Township, MI (US);
Chrysler Group LLC, Auburn Hills, MI (US);
Abstract
Ignition timing for a combustion engine may be controlled by determining the roughness of current engine operation, comparing the determined roughness with a control roughness to determine if the determined roughness is within a threshold limit of the control roughness, and changing the ignition timing in a subsequent fuel delivery event as a function of the difference between the determined roughness and the control roughness. Preferably, the ignition timing is changed at least when the determined roughness is not within the threshold limit, although other factors may be taken into account when changing the ignition timing.