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Abstract：
The purpose of this study was to empirically evaluate the performance of fibrous materials that meet the criteria for inlet air filtration in internal combustion engines. The characteristics of filtration efficiency and accuracy, as well as the characteristics of flow resistance, were determined based on the mass of dust accumulated in the filter bed during the filtration process. Single-layer filter materials tested included cellulose, polyester, and glass microfiber. Multilayer filter media such as cellulose-polyester-nanofibers and cellulose-polyester were also examined. A new composite filter bed-consisting of polyester, glass microfiber, and cellulose-and its filtration characteristics were evaluated. Utilizing specific air filtration quality factors, it was demonstrated that the composite is characterized by high pre-filtration efficiency (99.98%), a short pre-filtration period (qs = 4.21%), high accuracy (dpmax = 1.5-3 µm) for the entire lifespan of the filter, and a 60-250% higher dust absorption coefficient compared to the other tested materials. A filtration composite bed constructed from a group of materials with different filtration parameters can be, due to its high filtration efficiency, accuracy, and dust absorption, an excellent filter material for engine intake air. The composite\'s filtration parameters will depend on the type of filter layers and their order relative to the aerosol flow. This paper presents a methodology for the selection and testing of various filter materials.
摘要：
这项研究的目的是根据经验评估符合内燃机进气过滤标准的纤维材料的性能。过滤效率和准确性的特点，以及流动阻力的特性，是根据过滤过程中积聚在滤床中的粉尘质量确定的。测试的单层过滤材料包括纤维素，聚酯,和玻璃微纤维。还检查了多层过滤介质如纤维素-聚酯-纳米纤维和纤维素-聚酯。一种由聚酯组成的新型复合滤床，玻璃超细纤维，和纤维素及其过滤特性进行了评估。利用特定的空气过滤质量因素，结果表明，该复合材料具有高的预过滤效率(99.98%)，过滤前时间短(qs=4.21%)，高精度（dpmax=1.5-3µm）过滤器的整个寿命，与其他测试材料相比，吸尘系数高60-250％。由一组具有不同过滤参数的材料构成的过滤复合床可以是，由于其高过滤效率，准确度,和吸尘，发动机进气的优良过滤材料。复合材料的过滤参数将取决于过滤层的类型及其相对于气溶胶流的顺序。本文介绍了各种过滤材料的选择和测试方法。
