发动机工作时因点火时间提前、发动机负荷大、温度高及燃料的质量差等影响,会引起发动机爆震。发生爆震时,由于气体燃烧在活塞运动到上止点之前,轻者产生噪音及降蚊动机的功率,重者会损坏发动机的机械部件。为了防止爆震的产生,爆震传感器是不可缺少的部件,它通过电子控制系统调整点火提前时间. Engine work due to early ignition time, the engine load, high temperature and poor fuel quality, will cause the engine knock. In the event of a knock, the lighter will cause noise and power of falling mosquitoes before the piston reaches the top dead center due to the combustion of the gas, which may damage the mechanical parts of the engine. In order to prevent the knocking, knock sensor is an indispensable part, which adjust the ignition advance time through the electronic control system.