How normal is the static pressure of the automobile intake pipe?

The normal value of engine intake manifold vacuum is between 64-7 1 kPa.

If a cylinder is not working properly, it can be diagnosed by single cylinder flameout. After the single cylinder is turned off, the greater the drop value of Px, the better. This is an index to judge the quality of each cylinder (ignition, fuel injection and sealing). Quickly open and close the throttle.

Located in the engine room, it is connected with the intake manifold through a vacuum tube or directly installed on the intake manifold behind the throttle. It measures the absolute pressure of the intake manifold behind the throttle and detects the change of the absolute pressure in the manifold according to the engine speed and load.

Main advantages:

The inlet diameter of the intake pipe determines the total air intake, which is determined according to the throttle diameter. The diameter of the intake manifold determines the intake volume of each cylinder, and the intake volume is determined according to the intake diameter of the intake port.

The length of the intake manifold affects the dynamic effect. In the optimization calculation of intake pipe, it is optimized as a target parameter. The volume of the voltage stabilizing cavity affects the wave (resonance) effect.