Intake pipe is one of the different structural parts between electronic fuel injection engine carburetor engine.

The influence of the main parameters of the intake pipe on the intake performance of the engine is summarized as follows:

(1) The diameter of the intake pipe determines the total intake air volume, which is determined by the diameter of the throttle. 

(2) the intake manifold diameter determines the intake volume of each cylinder the intake diameter of the intake port. 

(3) the length of intake manifold will affect the dynamic effect. In the optimization calculation of intake pipe, it is used as the target parameter to optimize. 

(4) the volume of pressure stabilizing cavity will affect the effect of fluctuation (resonance). The appropriate volume of the surge chamber can only use the fluctuation effect to improve the inflation efficiency, but also make the pressure environment in the surge chamber relatively stable, which provides a good condition for the use of dynamic effect eliminates the interference. The intake of each cylinder improves the uniformity of intake.

(5) the direction of the air inlet will affect the uniformity of the air inlet. Through the analysis of various factors, it is determined that the optimal target parameters for the optimal calculation of intake manifold are the length of intake manifold the equivalent diameter of pressure stabilizing chamber.