发动机起动后如不及时断开起动开关,起动机将继续工作,使单向离合器长时间超越运行而损坏;此外,发动机起动后若误将起动开关接通,将使驱动齿轮与高速旋转的飞轮齿环相碰击,把齿轮打坏。为了防止这两种错误操作所造成的危害,在许多汽车上装有起动继电器以保护起动机和飞轮齿环。但老 If the engine is not started promptly disconnect the start switch, the starter will continue to work, so that the one-way clutch for a long time beyond the operation of the damage; In addition, the engine start if the wrong start switch connected, the drive gear and high-speed rotating flywheel Ring gear hit the gear broken. In order to prevent the harm caused by these two erroneous operations, many vehicles are equipped with a starter relay to protect the starter and the flywheel ring. But old