Offset choke introduction
That is, the choke shaft is offset. The choke shaft is connected to the vacuum piston rod and the bimetal torsion spring through the linkage plate. The choke is biased to generate an airflow moment M that causes the choke to open when starting. The higher the engine speed and the greater the vacuum after the throttle, the greater the airflow speed and the greater the degree to which the choke opens, thus avoiding excessive mixing of the mixture after the increase in speed.