当汽油机的火花塞点燃混合气后,火焰便以火花塞为中心向前推进,使末端未燃气体受到压缩和热辐射,温度逐渐升高。如果在火焰前锋尚未到达前,未燃混合气发生自燃,由于其物理化学准备时间较长而产生了大量活泼的中间产物,使燃烧速度变得极快,压缩骤然上升,强烈的爆震波冲击燃烧室,引起发动机剧烈 When the spark plug of the gasoline engine ignites the mixture, the flame is propelled forward with the spark plug as the center, so that the unburned gas at the end is compressed and radiated and the temperature gradually rises. If the flame front has not yet arrived before the spontaneous combustion of unburned gas, due to its physical and chemical preparation for a long time and produce a large number of lively intermediate products, so that the burning rate becomes very fast, the compression suddenly rose, a strong blast shock wave combustion Room, causing the engine fierce