发动机高温大约占发动机总故障的20％左右,一般多发生在夏季。夏季环境温度高,发动机散热困难,所以,分析发动机高温故障原因,找出有效的维修保养办法,可确保夏季矿山生产作业的顺利进行。 1 冷却系的工作原理 矿用汽车一般采用强制闭式水冷发动机,由水泵、节温器、水箱散热器、风扇、水套、膨胀水箱及暖风系统等组成。 当发动机工作时,曲轴皮带轮通过风扇皮带带动风扇及 Engine high temperature accounts for about 20% of the total engine failure, usually occurs in the summer. Summer high ambient temperature, the engine cooling difficult, therefore, analysis of high temperature engine failure reasons to find an effective maintenance methods to ensure the smooth progress of mining operations in summer. 1 cooling system works Mine commonly used compulsory closed water-cooled engine, from the pump, thermostat, water radiator, fan, water jacket, expansion tank and heating system and other components. When the engine is working, the crankshaft pulley drives the fan through the fan belt