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:
Apr. 18, 1995
Filed:
Oct. 15, 1993
Tsuyoshi Takizawa, Wako, JP;
Hiroshi Ito, Wako, JP;
Yoichi Iwata, Wako, JP;
Toshihiko Sato, Wako, JP;
Naoki Iida, Wako, JP;
Takayoshi Nakayama, Wako, JP;
Honda Giken Kogyo K.K., Tokyo, JP;
Abstract
An air-fuel ratio control system for an internal combustion engine having a catalytic converter arranged in the exhaust system, and an air-fuel ratio sensor arranged upstream of the catalytic converter calculates an air-fuel ratio correction amount by means of proportional control and integral control based on an output from the air-fuel ratio sensor, and controls an air-fuel ratio of a mixture supplied to the engine, based on the air-fuel ratio correction amount. A control frequency at which the air-fuel ratio control is carried out is increased when deterioration of the catalytic converter is detected.