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:
Dec. 12, 1989
Filed:
Feb. 15, 1989
Applicant:
Inventors:
Masanobu Uchinami, Hyogo, JP;
Toshihisa Takahashi, Hyogo, JP;
Hiroyoshi Suzuki, Hyogo, JP;
Ryoji Nishiyama, Hyogo, JP;
Shinichi Nishida, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02D / ; F02D / ;
U.S. Cl.
CPC ...
123479 ; 123489 ;
Abstract
An air-fuel ratio control apparatus for an internal combustion engine comprises feedback control of the air-fuel ratio control, wherein a pump-driving voltage for flowing a pump-driving current is lowered to a predetermined value, and feedback control is suspended when the pump-driving current becomes lower than a predetermined value.