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:
May. 15, 2007
Filed:
Jan. 26, 2006
Roger C Sager, Munith, MI (US);
David P Ploucha, Ann Arbor, MI (US);
Thomas Stephens, Pinckney, MI (US);
Craig Keighron, Oak Park, MI (US);
Roger C Sager, Munith, MI (US);
David P Ploucha, Ann Arbor, MI (US);
Thomas Stephens, Pinckney, MI (US);
Craig Keighron, Oak Park, MI (US);
DaimlerChrysler Corporation, Auburn Hills, MI (US);
Abstract
A method of diagnosing an operating condition of a short runner valve in an intake manifold of an internal combustion engine using an exhaust sensor in an exhaust manifold of the internal combustion engine. The short runner valve is commanded to an open position for a test period, it is resolved whether the test period has elapsed, and it is determined whether a sensed exhaust gas parameter has exceeded a threshold during the test period. A pass signal is issued if the sensed exhaust gas parameter has exceeded the threshold within the test period. Otherwise, a fail signal is issued if the sensed exhaust gas parameter has not exceeded the threshold within the test period.