What's the name of the accelerator in the teaching process? The term chemical piping fittings is also called

What is the name of the throttle of the car during the teaching process? The term of chemical pipe fittings is also called throttling. Refers to the control device that controls the power and thrust of the engine. On the piston aero-engine, the throttle valve controls the opening of the carburetor to control the filling amount of the cylinder, thus determining the output power of the engine.