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. 01, 1991
Filed:
Jun. 11, 1990
Applicant:
Inventors:
Assignee:
Honda Giken Kogyo K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123489 ; 73 2332 ; 731182 ;
Abstract
Deterioration of an exhaust gas concentration sensor for an internal combustion engine is detected by integrating a difference between an output from the exhaust gas concentration sensor and a predetermined reference value which is outside a range of the output which can be assumed during normal operation of the exhaust gas concentration sensor, comparing a thus obtained integral value with a predetermined deterioration-determining value, and determining from the result of the comparision whether the exhaust gas concentration sensor is deteriorated.