How often does the engine throttle change?

The throttle of the engine is replaced every 20,000 kilometers. Throttle is a controllable valve that controls air to enter the engine. There are two types: traditional pull-wire type and electronic throttle valve. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be burned to do work. The air filter is connected with it, and the engine block is connected with it. Engine is not only suitable for power generation device, but also refers to the whole machine (such as gasoline engine and aero-engine) including power device. Its types include internal combustion engines (gasoline engines, etc.). ), external combustion engine (Stirling engine, steam engine, etc. ), gas turbine (racing car), motor, etc.