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:
Mar. 19, 2002
Filed:
May. 18, 2000
Kenneth P DeGroot, Macomb Township, MI (US);
Yi Cheng, Jackson, MI (US);
Edward M Vuylsteke, Ann Arbor, MI (US);
Timothy A Coatesworth, Lake Orion, MI (US);
Jonathan F Rose, Westland, MI (US);
Bruce H Teague, Grosse Pointe Park, MI (US);
Michael J Reale, Royal Oak, MI (US);
DaimlerChrysler Corporation, Auburn Hills, MI (US);
Abstract
A method of determining a goal voltage for a fuel/air sensor of an engine electronic fuel injection system includes the steps of determining a goal fuel/air sensor voltage, superimposing a wave form forcing function to the fuel/air sensor voltage for providing a goal fuel/air sensor voltage having a wave form pattern and controlling the engine to operate according to the goal fuel/air sensor voltage. The wave form forcing function provides the required fuel/air perturbations that are required to retain proper oxygen storage of the catalyst to maintain high three-way conversion efficiency.