关键词: 消声器；GT-Power；排气系统积水；消声器结冰；消声器冰堵；排水孔

Abstract: Based on the fact that during the after-sale process of a certain vehicle, the vehicle could not start normally due to the freeze-up of the exhaust muffler in winter. In order to avoid such problems affecting user experience in subsequent vehicles, the faulty parts are disassembled, the cause of the problem was muffler freeze by check the fault parts, and the problem was repeated through the winter test to simulate the actual working conditions of the user. Through GT-POWER, the structure optimization was carried out for the muffler and the performance of the scheme was verified, meet the requirements of the vehicle and user service. It provides useful reference for solving the problem of muffler freeze-up, and also provides reference for muffler structure and noise design.

Key words: Muffler; GT-Power; Exhaust system condensed water; Muffler freeze; Muffler freeze-up; Drain hole