Does the throttle control the throttle or the fuel injection quantity?

Throttle control throttle. With the air intake, the engine computer will decide how much gasoline to inject according to the air intake, which means that how much fuel to inject is controlled by the engine computer. Then why control the air intake when stepping on the accelerator instead of directly controlling the fuel injection? This is related to the combustion characteristics of the engine. There are two reasons: first, the best air-fuel ratio can be achieved through the throttle valve, so that gasoline can burn completely; Second, the energy generated by combustion can be used to generate electricity to the maximum extent.

A gasoline engine will not burn until it is ignited by a spark plug. Air and gasoline form a mixture and enter the cylinder. When the piston runs near the top dead center, the spark plug ignites and burns, and the flame spreads around the spark plug until it burns completely. This is a process that takes some time.

If the throttle valve controls the fuel injection quantity instead of the intake air quantity, then the intake air quantity will remain at the maximum state and will not change at first, only the fuel injection quantity will be changed. Small throttle will make more air and less gasoline, which will lead to diluted mixture, slower combustion speed, longer piston pushing time, reduced thrust, and even some gasoline has entered the exhaust cycle before it can burn, leading to a decline in power, so gasoline engines.

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