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95.为什么摩托车发动机会发生过热? 摩托车发动机过热是指发动机的工作温度过高的现象。当摩托车按一般正常规律行驶后,气缸体和气缸盖外表面的油污被炙烤得冒烟;在关闭电源开关后,发动机仍不熄火,此时用手触摸曲轴箱感到手无法在上面停留,说明发动机过热。发动机过热往往还伴有发动机工作无力的症状。造成摩托车发动机过热的原因一般有以下一些因素:发动机散热不良,在气缸体和气缸盖的散热片上有泥灰、油污及一些其它不该有的遮挡物等,或水冷发动机的冷却水量不足;摩托车长时间处于低车速高负荷状态下运转;使用低辛烷值汽油,或长时期存放的变质汽油及发动机燃烧室严重积炭而引起不正常燃烧使工作温度升高;还有可燃混合气的浓度过稀或过浓,点火时间过迟,发动机的润滑冷却油道不畅等,均会使发动机过热。
95. Why motorcycle engine overheating? Motorcycle engine overheating is the phenomenon of the engine operating temperature is too high. When the motorbike travels normally, the oil on the outer surface of the cylinder block and cylinder head is smoked. When the power switch is turned off, the engine still does not turn off. At this moment, the crankcase is touched by hand, and the hand can not stay on it , Indicating the engine overheating. Overheating of the engine is often accompanied by symptoms of inability of the engine to work. Motorcycle engine overheating caused by the following general factors: poor engine cooling, the cylinder block and the cylinder head of the heat sink on the ash, oil and some other should not have shelter, etc., or lack of cooling water cooling engine; The motorcycles operate at low speed and high load for a long time. The use of low-octane gasoline, or long-term storage of metamorphic gasoline and the engine combustion chamber caused by improper combustion caused by improper combustion of the working temperature; there are combustible mixture The concentration of too thin or too thick, too late to fire, the engine lubrication and cooling oil poor, etc., will make the engine overheating.