拖拉机、汽车的一些装置和部件上都设置了与大气相通的通气孔。其目的是为了防止密闭空间的流体发生变化时产生压差,影响其正常工作性能。各部位的通气孔作用原理基本相同,但其结构、形状却有差异。且使用中,常常被油污尘泥堵塞或覆盖,使通气孔失去作用,甚至导致事故。因此,保养维修中一定要注意检查各部位通气孔是否畅通。现将拖拉机、汽车上常见的通气孔的设置部位及其主要作用介绍如下: Tractors, some of the car’s devices and components are equipped with vents connected to the atmosphere. Its purpose is to prevent confined space fluid changes occur when the pressure differential, affecting its normal working performance. Ventilation in all parts of the role of the same principle, but its structure, shape is different. And in use, often clogged or covered with oily dirt and mud, the vents play a role, and even lead to accidents. Therefore, maintenance and repair must pay attention to check all parts of the vent is smooth. The tractor, the car now common vent settings and its main role as follows: