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:
May. 27, 1980
Filed:
Apr. 21, 1978
Toshiro Harada, Okazaki, JP;
Tadayuki Kubo, Toyota, JP;
Kazusato Kasuya, Kariya, JP;
Yukihiro Watanabe, Nagoya, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Aisan Industry Co., Ltd., Obu, JP;
Abstract
Disclosed herein is a comparator circuit used in a system for controlling, in accordance with an air-fuel ratio signal from an O.sub.2 sensor arranged in an exhaust system of an internal combustion engine, the air-fuel ratio of the exhaust gas. The comparator has two inputs, one of which receives a signal having a phase which is the same as a signal from the O.sub.2 sensor, the other of which receives a delayed phase signal. The output of the comparator operates to provide, in accordance with the voltage level difference between the inputs, two deviation signals, one of which indicates that air-fuel ratio has deviated to the rich side of the air-fuel ratio the other of which indicates that the air-fuel ratio has deviated to the lean side of the air-fuel ratio.