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:
Jun. 21, 1983
Filed:
Jul. 07, 1981
Toshiro Kurihara, Koganei, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A system for controlling the air-fuel ratio for a carburetor for an internal combustion engine having an intake passage, an exhaust passage, a throttle valve, a detector for detecting the concentration of a constituent of the exhaust gases, an on-off type electromagnetic valve for correcting the air-fuel ratio of the air-fuel mixture supplied by an air-fuel mixture supplier and an electronic controller. The electronic controller comprises a judging circuit for comparing the output signal of the detector with a stoichiometric reference signal, for driving the on-off electromagnetic valve for controlling the air-fuel ratio to a value approximating the stoichiometric air-fuel ratio. A load sensor and an engine temperature sensor are provided respectively. A correcting circuit renders the electronic controller non-responsive to the detector, when the engine temperature sensor actuates in the cold engine operation and responsive to the output of the load sensor, whereby the on-off electromagnetic valve operates in accordance with the output of the sensor.