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. 10, 2002
Filed:
Jun. 19, 2001
David George Farmer, Plymouth, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Michael John Cullen, Northville, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A method and system for controlling the operation of an internal combustion engine, wherein exhaust gas generated by the engine is directed through an emission control device, includes determining instantaneous rates of storage for a constituent of the exhaust gas, such as NO , as well as the capacity reduction of the device to store the exhaust gas constituent as a function of a calculated value representing an amount of SO which has accumulated in the device since a prior device-regeneration (desulfation) event. The calculated accumulated SO value is also preferably used to schedule a device-regeneration event, as when the calculated accumulated SO value exceeds a predetermined threshold value.