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. 08, 1988
Filed:
Mar. 31, 1986
Applicant:
Inventors:
Nobuaki Kayanuma, Gotenba, JP;
Toshinari Nagai, Susono, JP;
Takatoshi Masui, Mishima, JP;
Yoshiki Chujo, Mishima, JP;
Hironori Bessho, Susono, JP;
Yasushi Sato, Mishima, JP;
Toshiyasu Katsuno, Susono, JP;
Toshio Tanahashi, Susono, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
60274 ; 60276 ; 60285 ; 123489 ;
Abstract
In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, a delay operation is performed upon the output of the downstream-side air-fuel ratio sensor, so that the actual air-fuel ratio is adjusted in accordance with the output of the upstream-side air-fuel ratio sensor and the delayed output of the downstream-side air-fuel ratio sensor.