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:
Oct. 22, 1985
Filed:
Jun. 21, 1984
Applicant:
Inventors:
Masakazu Ninomiya, Kariya, JP;
Masaya Fujimoto, Ohbu, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123440 ; 123489 ;
Abstract
An air-fuel ratio control system for an internal combustion engine in which the air-fuel ratio of the engine is controlled by feedback using an air-fuel ratio sensor of a critical current type. When the air-fuel ratio is not controlled by such feedback, the voltage applied to the air-fuel ratio sensor is reduced or cut off to reduce physical deterioration thereof.