Evaporative emission control system for an internal combustion e

Details Evaporative emission control system for an internal combustion e Evaporative emission control system for an internal combustion e

1979-09-28

1982-01-05

Lazarus, Ronald H.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123519, F02M 5900

Patent

active

043088422

ABSTRACT:
An evaporative emission control system for an internal combustion engine, in which fuel vapors generated in a fuel reservoir are stored in a fuel vapor storage canister when the engine is stopped so that the fuel vapors may be used when the engine is in operation. A purge control valve is disposed on a discharge port of the canister. The purge control valve is designed so that it is not opened unless a temperature of the engine exceeds a level above a predetermined threshold even when the engine is in operation. When the engine is operated at a low temperature, the stored fuel vapors in the canister are not released for stabilization in the air-fuel ratio of a mixture fed to the engine, and when the engine is operated at a high temperature, the stored fuel vapors are released into the engine to effectively consume the fuel.

REFERENCES:
patent: 3001519 (1961-09-01), Dietrich
patent: 3680318 (1972-08-01), Nakajima
patent: 3913545 (1975-10-01), Haase
patent: 4176639 (1979-12-01), Shinoda

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