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:
Jun. 12, 2001
Filed:
May. 19, 1999
David George Farmer, Plymouth, MI (US);
Gopichandra Surnilla, Westland, MI (US);
Jerry Dean Robichaux, Riverview, MI (US);
Salomone Castro, Oak Park, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A nitrous oxide trap temperature control system for desulfating the trap uses and engine with some cylinders operating with lean combustion and some cylinders operating with rich combustion. The lean and rich combustion gases are combined to form an mixture which is fed to the trap to provide an exothermic reaction. The desired lean and rich air/fuel ratios of the respective lean and rich cylinders are determined based in part on the difference between the trap temperature and a desired trap temperature. The desired lean and rich air/fuel ratios of the respective lean and rich cylinders are also determined from the desired mixture air/fuel ratio entering the trap.