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10.4 爆震爆震是指汽油机发出尖锐的金属敲击声,其剧烈程度可随着节气门开度的增大而增大。查找该故障症状产生原因的步骤如下。 a.检查汽油牌号(如果汽油的辛烷值太低,则汽油的抗爆性能太差,汽油机容易发生爆震)。 b.检查火花塞热值范围是否正常(如果火花塞热值太低,则火花塞温度会很高,汽油机容易发生爆震)。 c.检查冷却系统是否正常(如果冷却液温度过高,则燃烧室温度就高,汽油机容易发生爆震)。 d.检查汽油机机械部分的状况:凸轮、凸轮轴和正时链等零件
10.4 Knocking Knocking refers to the sharp metal beating sound emitted by a gasoline engine. Its severity can increase as the throttle opening increases. The steps to find out why the symptom of the fault occurs are as follows. a. Check the gasoline grade (if the octane number of the gasoline is too low, then the resistance of the gasoline is too poor, and the gasoline engine is prone to knocking). b. Check the spark plug heat value range is normal (if the spark plugs calorific value is too low, the spark plug temperature will be high, the gasoline engine prone to knock). c. Check the cooling system is normal (if the coolant temperature is too high, the combustion chamber temperature is high, the gasoline engine prone to knock). d. Check the condition of the mechanical part of the gasoline engine: cam, camshaft and timing chain and other parts