拖拉机夏季使用五预防一、预防发动机功率下降。夏季天气气温高，空气密度小，致使发动机气缸的充气系数降低，新鲜空气量减少，燃油与空气的混合浓度增高，造成燃气燃烧不良，积炭严重，热值不能充分发挥出来，发动机功率下降。应正确调整供油量和供油时间，保证喷油质量... Tractor summer use five prevention First, to prevent the decline in engine power. In summer, the weather temperature is high and the density of air is small, resulting in the decrease of the air-charge coefficient of the engine cylinder, the decrease of the amount of fresh air, and the increase of the mixture concentration of fuel and air, resulting in poor combustion of the gas, serious coke deposition, insufficient heat value, and decreased engine power. Should be the correct adjustment of fuel supply and fuel supply time to ensure that the fuel injection quality ...