Why is the intake hose of Geely GX7 18 different from that of 20 14? There is an additional resonance box in model 15. What is this for?

The resonance box of engine intake pipe mainly plays the role of reserve, harmonic and voltage stabilization. The harmonic action is to let the free radical air flow into the resonance box with special shape, give the free radical air flow a buffer zone, and reduce the instantaneous pressure and friction sound of the air flow. The purpose of reserve is to solve the problem that when the throttle valve is instantly opened (large), the air flow can't overcome the air intake shortage caused by air filter resistance, which plays the role of instantaneous supplement and of course also plays the role of stabilizing pressure.