What is the large black pipe on the engine?

[McAngelo]

Engine intake pipe. Extended information is as follows: 1. Introduction: The internal combustion engine intake pipe refers to the pipe that directs the gas required for combustion into the engine. 2. Requirements: The intake pipe must ensure sufficient flow area, avoid bends and sudden changes in cross-section, improve the smoothness of the pipe surface, etc., to reduce resistance. To this end, high-performance gasoline engines adopt a straight-line intake system. While straightening, it is also necessary to reasonably design the throttle and intake pipe length, and arrange an appropriate volume of the pressure stabilizing chamber to achieve high-speed and high-power purposes. 3. Structural parameters: Among the structural parameters of the intake manifold, the main structural parameter that determines the effect of fluctuation on intake is the length of the intake manifold. To ensure the utilization of fluctuation effects, it is necessary to ensure as large a volume of the pressure stabilizing chamber as possible.