“电喷”实际上是“电子控制汽油喷射系统”的简称，电子控制汽油喷射系统由控制单元中的信号微处理器计算发动机在不同工况下的最佳燃烧比，实现燃油和点火的集中控制。目前电子控制汽油喷射系统的主要控制功能除控制汽油喷射外，还控制点火（点火时刻、闭合角、爆震的防止） “EFI” is actually the abbreviation of “electronically controlled gasoline injection system”. The electronically controlled gasoline injection system calculates the optimal combustion ratio of the engine under different operating conditions by the signal microprocessor in the control unit to achieve the concentration of fuel and ignition control. At present, the main control functions of the electronically controlled gasoline injection system include not only controlling the injection of gasoline but also controlling the ignition (ignition timing, closing angle and prevention of knocking)