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1.前言近年来,在强调汽车的高性能化中,不仅要求发动机节省资源、降低油耗,而且对高功率化的要求也越来越高。为了达到高功率化的要求,目前汽车发动机正向涡轮增压、四气门、双顶置凸轮轴、增加排量方面迅速发展。由于这些高功率发动机放热量增加,对发动机冷却系统的要求更严了。另外,由于在最近的高性能汽车上增加了各种辅助装置,发动机室内富裕空间的减少以及降低汽车空气阻力的车头流线型化对冷却系
1. Introduction In recent years, emphasizing the high performance of vehicles, not only requires the engine to save resources and reduce fuel consumption, but also higher and higher requirements of the higher and higher. In order to meet the high power requirements, the current car engine turbo positive, four-valve, double overhead camshaft, increasing the rapid development of displacement. Due to the increased heat generation of these high-power engines, the requirements on the engine cooling system are more stringent. In addition, due to the addition of various auxiliary devices to the recent high-performance vehicles, the reduction of rich space in the engine room and streamlining the front of the car to reduce the air resistance of the cooling system