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. 06, 1984
Filed:
Aug. 12, 1982
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An air/fuel ratio feedback control system for internal combustion engines, which includes: a fail safe device comprising at least one of a first failure detecting means for detecting whether no inversion occurs in the output level of the O.sub.2 sensor over a predetermined period of time during air/fuel ratio feedback control dependent upon the O.sub.2 sensor output when the O.sub.2 sensor is activated, and a second failure detecting means for detecting whether no activation of the O.sub.2 sensor occurs over a second predetermined period of time after the engine temperature has risen above a predetermined value during the above feedback control; and means for rendering the fail safe device inoperative when a detected value of ambient atmospheric pressure is lower than a predetermined value.