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. 04, 1983
Filed:
Oct. 21, 1981
Kenji Masaki, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In an internal combustion engine having at its intake section a two-barrel type carburetor including a primary fuel supply system having a primary main fuel supply line and a primary slow fuel supply line and a secondary fuel supply system having a secondary main fuel supply line and a secondary step fuel supply line, and at its exhaust section a three-way catalytic converter, there is provided an improved closed loop type air-fuel ratio control system which controls not only the amount of air fed to the primary main and slow fuel supply lines but also the amount of air fed to the secondary main and step fuel supply lines in accordance with the concentration of a selected component of the engine exhaust gas. A switching valve is associated with both the primary slow fuel supply line and the secondary main or step fuel supply line so as to alter the course of the air introduction into the primary slow fuel supply line or into the secondary main or step fuel supply line in accordance with the engine load.