Air pollution preventing device for internal combustion engine

Details Air pollution preventing device for internal combustion engine Air pollution preventing device for internal combustion engine

1985-09-12

1987-03-03

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123489, F02M 2508, F02D 4114

Patent

active

046467025

ABSTRACT:
An air pollution preventing device having a canister for preventing fuel vapor formed in the fuel tank from escaping into the atmosphere is provided with a feedback control detecting circuit which detects whether the feedback control of the air-fuel ratio of intake mixture is effected, a temperature sensor which detects the fuel temperature and a purge control valve control circuit which receives outputs of the feedback control detecting circuit and the temperature sensor and controls the purge control valve so that the purge control valve is opened to permit introduction of the fuel vapor trapped in the canister only when the feedback control is effected when the fuel temperature is lower than a preset value and is opened irrespective of whether or not the feedback control is effected when the fuel temperature is not lower than the preset value.

REFERENCES:
patent: 4467769 (1984-08-01), Matsumura

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