关键词: 车门漏水；密封条；淋雨试验；车门密封系统

Abstract: The door sealing system is the key to the sealing of the whole vehicle. Once the door leaks, it will have a very serious impact on customers and car manufacturers. This article introduces the water leakage fault of a heavy-duty vehicle door system, explains in detail the various causes of door water leakage and rectification measures, and analyzes the process of door water leakage, the route of door water entry, and the failure cause of door sealing system. It is determined that the door sealing system is not only related to the structure of the weather strip, but also to the coordination of the side panel sheet metal parts. The control of the gap between the door and the side panel sheet metal directly affects the compression area of the sealing strip and the change of the compression load. The case study provides a powerful reference for the later design of the door sealing system.

Key words: Door water leakage; Sealing strip; Rain test; Door sealing system