What is the purpose of putting the throttle valve and choke valve in the full open position?

Improve the starting performance of the engine. The function of automobile choke valve is to close some air inlets properly when the engine is cold-started. Throttle can increase the gasoline concentration of the mixture entering the cylinder and improve the starting performance of the engine. The purpose of putting the throttle and choke valve in the full open position is to improve the starting performance of the engine. Choke valve is a part of carburetor of gasoline engine. At the inlet of the carburetor, it is operated by the operating knob installed on the dashboard.