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:
Jul. 13, 1999
Filed:
May. 08, 1998
Leighton Ira Davis, Jr, Ann Arbor, MI (US);
Charles Stuart Daw, Knoxville, TN (US);
Lee Albert Feldkamp, Plymouth, MI (US);
John William Hoard, Livonia, MI (US);
Fumin Yuan, Canton, MI (US);
Francis Thomas Connolly, Ann Arbor, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Ford Motor Company, Dearborn, MI (US);
Lockheed Martin Energy Research Corp., Oak Ridge, TN (US);
Abstract
Cyclic variation in combustion of a lean burning engine is reduced by detecting an engine combustion event output such as torsional acceleration in a cylinder (i) at a combustion event (k), using the detected acceleration to predict a target acceleration for the cylinder at the next combustion event (k+1), modifying the target output by a correction term that is inversely proportional to the average phase of the combustion event output of cylinder (i) and calculating a control output such as fuel pulse width or spark timing necessary to achieve the target acceleration for cylinder (i) at combustion event (k+1) based on anti-correlation with the detected acceleration and spill-over effects from fueling.