What is throttle and choke, what is its function and where is it controlled?

Throttling is throttling, and throttling is throttling. The choke valve is a valve plate with a spring. When the engine is started after shutdown, it will automatically open under the suction of the cylinder, but it has certain elasticity and the suction will be too large, so that more oil and gas can be sucked from the oil pool of the carburetor. Its function is to add concentrated mixed steam to help ignition, which is often used at startup or in cold weather.

The throttle is what we usually call the throttle, and the throttle size is controlled by the oil throttle. At different times, the gasoline engine controls the engine speed by controlling the intake air. We just call it the throttle size, which is the so-called diesel engine. The diesel engine controls the engine speed by controlling the oil intake.