Document Type and Number:
Japanese Patent JPS6318023
Kind Code:
B2
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.
Inventors:
KURIHARA TOSHIRO
Application Number:
JP9735980A
Publication Date:
April 15, 1988
Filing Date:
July 16, 1980
Export Citation:
Assignee:
FUJI JUKOGYO KK
NITSUSAN JIDOSHA KK
NITSUSAN JIDOSHA KK
International Classes:
F02D41/14; F02M7/24
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