一、呼吸小孔 油箱盖上的小孔及蓄电池盖上的小孔都属于呼吸小孔。其作用是:当温度升高或充电时电解液电解产生气体,使容器内压力增加,气体通过小孔即排入大气;停车后温度下降或油面降低使容器内压力降低,大气通过小孔即进入容器内,使容器内压力等于大气压力,防止破坏系统正常工作。 First, breathing holes Small holes on the fuel tank cover and battery cover holes are small breathing holes. Its role is: when the temperature rise or charge electrolyte electrolysis produce gas, the pressure in the container increases, the gas is discharged into the atmosphere through the orifice; after stopping the temperature drop or reduce the pressure to reduce the pressure within the container, the atmosphere through the small hole That is, into the container, the pressure inside the container equal to the atmospheric pressure, to prevent damage to the system normal work.