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. 12, 2002
Filed:
Jan. 20, 2000
Kenneth John Behr, Farmington Hills, MI (US);
Brent Edward Sealy, Dearborn, MI (US);
Richard Andrew Booth, Canton, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A method and system for adjusting a fuel injection amount in one of two groups of cylinders in an internal combustion engine using feedback signals generated by oxygen sensors coupled to both groups of cylinders. The claimed invention includes first and second groups of engine cylinders coupled to first and second exhaust banks respectively. The first exhaust bank includes a catalyst and at least a pre-catalyst EGO sensor for generating a first feedback signal. The second exhaust bank includes a catalyst and a post-catalyst EGO sensor for generating a second feedback signal. A controller calculates desired air/fuel ratio values for the first group of cylinders based on the first feedback signal. The controller also calculates desired air/fuel ratio values for the second group of cylinders based on the first feedback signal and the second feedback signal. The controller adjusts the level of liquid fuel injected into the groups of cylinders based on the calculated air/fuel ratio values.