1.前言空气滤清器的历史,是和内燃机作为汽车动力使用的历史大体上相一致的。除电气汽车和飞轮汽车以外,其它汽车是将石油系的燃料与空气一起燃烧,利用其能量行驶在道路上。在这种汽车上,由于空气滤清器具有除去对燃烧不必要的,而且又是机械摩擦部大敌的灰尘,以及对于减轻吸入空气时产生的刺耳的噪声而起着消声器的功能,所以它 1. Introduction The history of air filters is largely consistent with the history of internal combustion engines as a vehicle power. In addition to electric cars and flywheel cars, other cars burn petroleum-based fuel with air and use their energy to drive on the road. In this type of automobile, since the air cleaner has the function of removing dust which is not necessary for combustion and is also a major enemy of the mechanical friction portion and functions as a muffler to reduce the noise caused by inhalation of air,