The role of the inlet pipe: the high temperature air compressed in the turbocharger is sent into the intercooler. With the improvement of the heat resistance requirements of the turbocharger system, the inlet pipe material of the intercooler is changed from the previous silicone rubber to the fluorine rubber DAI-EL with better heat resistance. In addition, because the oil of the cross cylinder mixture reducing device is reduced to the aspirating side, the oil resistance requirements are also improved.