The research status of air pre-filters for domestic and foreign machinery vehicles was introduced. The principle, structure and characteristics of typical air pre-filters on market were analyzed. The filtration efficiency, advantages and disadvantages of the typical air pre-filter were described. The existing problems and improvement measures of air pre-filters were proposed. The future development trend and research areas on the air pre-filters were discussed.%介绍了国内外机械车辆用空气预滤器的研究现状,分析了典型空气预滤器的原理、结构及特点,叙述了各种类型空气预滤器的过滤效能和优缺点,提出了空气预滤器存在的问题及其改进措施,并展望了其未来的发展趋势和研究方向.
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