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:
Oct. 20, 1998
Filed:
Apr. 05, 1995
Applicant:
Inventor:
Charles Allen Cockerill, Brighton, MI (US);
Assignee:
Ford Global Technologies, Inc., Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60274 ; 60276 ; 60285 ; 60289 ; 60290 ;
Abstract
A method and system for controlling the amount of secondary air introduced into a vehicle's exhaust gases in order to maintain a desired catalyst air/fuel ratio for a predetermined engine air/fuel ratio. First, a quantity of primary air flow necessary to maintain the predetermined engine air/fuel ratio is determined. Next, a quantity of secondary air flow necessary to maintain the desired catalyst air/fuel ratio is determined. Finally, a controller controls the amount of secondary air introduced into the vehicle's exhaust gases based on the determined quantity of secondary air flow.