What is the function of the intake manifold pressure sensor?

[TeaganLee]

The function of the intake manifold pressure sensor is to measure the amount of air entering the engine and provide this information to the engine control computer as a basis for controlling fuel injection quantity and ignition timing. The working principle of the intake manifold pressure sensor is to determine air density by measuring the absolute pressure in the intake pipe, and then calculate the amount of incoming air in conjunction with the engine speed. The intake manifold is located between the throttle valve and the engine intake valve. It is called a manifold because after air enters the throttle valve, it passes through the manifold buffer system, and the airflow path diverges here, corresponding to the number of engine cylinders. For example, a four-cylinder engine has four paths, and a five-cylinder engine has five paths, directing air into each cylinder respectively.