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:
Dec. 27, 2011
Filed:
Dec. 02, 2009
Christopher E. Whitney, Highland, MI (US);
Poh Fong Chin, Novi, MI (US);
William L. Aldrich, Iii, Davisburg, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Jeffrey M. Kaiser, Highland, MI (US);
Jun LU, Novi, MI (US);
Christopher E. Whitney, Highland, MI (US);
Poh Fong Chin, Novi, MI (US);
William L. Aldrich, III, Davisburg, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Jeffrey M. Kaiser, Highland, MI (US);
Jun Lu, Novi, MI (US);
Abstract
An engine control system comprises a base air per cylinder (APC) module, a catalyst temperature adjustment module, an ambient temperature adjustment module, and an APC adjustment module. The base APC module determines a base APC to reduce first engine pumping losses during a first deceleration fuel cutoff (DFCO) event relative to second engine pumping losses during a second DFCO event. The catalyst temperature adjustment module determines a catalyst temperature adjustment based on a catalyst temperature during the first DFCO event. The ambient temperature adjustment module determines an ambient temperature adjustment based on an ambient air temperature during the first DFCO event. The APC adjustment module selectively adjusts the base APC based on the catalyst temperature adjustment and the ambient temperature adjustment and controls at least one of the engine airflow actuators based on the adjusted base APC during the first DFCO event.