Internal-combustion engines – Charge forming device – Multiple carburetors
Patent
1984-04-09
1985-12-10
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Multiple carburetors
123440, F02B 300
Patent
active
045572429
ABSTRACT:
An air/fuel ratio feedback control system for an internal combustion engine of a vehicle includes means for determining an air/fuel ratio on the basis of an output signal of an oxygen sensor, an auxiliary supply passage for supplying the secondary air or fuel to the engine, a control valve for controlling the amount of the air or fuel flowing through the auxiliary passage, a control means for controlling the opening degree of the control valve in accordance with the determined state of the air/fuel ratio, means for detecting an operational state of the engine or the vehicle in which the feedback control of the air/fuel ratio is to be stopped and producing a detection signal, and means for maintaining the opening degree of the control valve at a middle level upon presence of the detection signal, whereby preventing the generation of over rich mixture during a transient period after the feedback control of the air/fuel ratio is restarted.
REFERENCES:
patent: 4359983 (1982-11-01), Carlson
patent: 4380985 (1983-04-01), Otsuka
patent: 4385602 (1983-05-01), Itou
patent: 4407243 (1983-10-01), Otsuka
patent: 4414950 (1983-11-01), Otsuka
Cox Ronald B.
Honda Giken Kogyo Kabushiki Kaisha
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