Air-fuel ratio adjusting system

摘要

In an air-fuel ratio adjusting system for internal combustion engine equipped with a carburetor having a bypass air passage for controlling an air-fuel ratio of an air-fuel mixture to be supplied to the engine, a bypass valve disposed in the bypass passage is so arranged as to be restored to its preset position, at which the air-fuel mixture with a proper air-fuel ratio is produced, whenever the engine is stopped, to thereby ensure a smooth starting of the engine even under the low temperature condition.