Internal-combustion engines – Charge forming device – Multiple carburetors
Patent
1986-01-14
1987-09-01
Wolfe, Jr., Willis R.
Internal-combustion engines
Charge forming device
Multiple carburetors
123587, 123588, 123440, F02M 2306, F02M 2308, F02M 2310
Patent
active
046901213
ABSTRACT:
An air intake side secondary air supply system for an internal combustion engine having an air intake side secondary air supply passage and an O.sub.2 sensor controls a duty ratio of opening and closing of an open/close valve disposed in the air intake side secondary air supply passage in accordance with a detected air-fuel ratio of mixture by means of an output signal of the O.sub.2 sensor. The system sets a base valve open period of the open/close valve every predetermined period and decreases the base valve open period by a first predetermined correction amount when the detected air-fuel ratio is leaner than a target air-fuel ratio, and increases the base valve open period by a second predetermined correction amount when the detected air-fuel ratio is richer than the target air-fuel ratio.
REFERENCES:
patent: 4136651 (1979-01-01), Hattori et al.
patent: 4478191 (1984-10-01), Kinoshita et al.
patent: 4478192 (1984-10-01), Kinoshita et al.
patent: 4566419 (1986-01-01), Ninomiya et al.
Asakura Masahiko
Kawanabe Tomohiko
Matsumoto Yukihiro
Muroya Minoru
Shiina Takanori
Honda Giken Kogyo Kabushiki Kaisha
Wolfe, Jr. Willis R.
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