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:
Nov. 21, 2006
Filed:
Sep. 30, 2004
Applicant:
Koichi Satoya, Toyota, JP;
Inventor:
Koichi Satoya, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/05 (2006.01);
U.S. Cl.
CPC ...
Abstract
An engine ECU executes a program including the steps of: detecting an air intake; subtracting an air fuel ratio detected by an upstream air fuel ratio sensor from that detected by a downstream air fuel ratio sensor; using the calculated air fuel ratio difference to determine a range for a lower GA range; determining a range for a higher GA range; and determining from the combination of the determined ranges of the lower and higher GA ranges whether a section A's exhaust system operates normally or has abnormality.