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:
Jan. 10, 2012
Filed:
May. 27, 2010
Gary C. Fulks, Rochester, MI (US);
Gary C. Fulks, Rochester, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
An engine control system, controller, and method for estimating a bounce back angle of an internal combustion engine. Typical crank sensors do not indicate crank direction, a feature that would be useful to determine if an engine reversal occurs leading to the engine accumulating a bounce back angle. A crank sensor signal is analyzed as the engine coasts to a stop so an engine reversal can be detected. After an engine reversal is detected, the crank sensor signal is analyzed to determine the bounce back angle. Engine reversal is detected by determining that the crank shaft has decelerated by more than a threshold value, or that the crank shaft has decelerated and then subsequently accelerated.