The main advantages of plastic intake manifolds are lower cost and lighter weight. In addition, since the thermal conductivity of the PA is lower than that of aluminum, the temperature of the fuel nozzle and the incoming air is low. It can not only improve the hot start performance, but also improve the power and torque of the engine. At the same time, it can avoid the heat loss in the pipe to a certain extent during cold start, accelerate the gas temperature, and the inner wall of the plastic intake manifold is smooth, which can reduce the air flow resistance and improve the engine. Performance.
In terms of cost, the plastic intake manifold and the aluminum intake manifold material cost are basically the same, the plastic intake manifold is formed at one time, and the qualification rate is high; while the aluminum intake manifold blank casting yield is low, and the machining cost is relatively high. Therefore, the production cost of plastic intake manifold can be reduced by 20%-35% compared with aluminum intake manifold.