In order to get the correct fuel supply, the invalid injection time must be included, that is to say, after the fuel supply is calculated, the invalid injection time must be added to inject the same amount of fuel as desired. Therefore, the ineffective injection time can also be regarded as an item of compensation injection. Of course, the ECU is not static. Another function of the memory is like the “black box” of an airplane, which can record the data of the car driving. Usually, many ECUs have the ability to “learn”. Under normal circumstances, the memory will keep recording your driving data. , become the learning program of ECU, to provide the best control state to adapt to your driving habits, this program is also called adaptive program. But because it is stored in the memory, just like the error code, once the battery is removed and the power supply is lost, all the data will be lost. The ECU can continuously learn the driver’s driving style from the data recorded in the memory, making it more humane. Of course, once a failure occurs, the information can also be read from the memory, so as to provide support for maintenance. After completing the “thinking”, the next step that the ECU needs to do is to “command”. The fuel injector is controlled by the ECU, which is responsible for adjusting the fuel injection volume and fuel injection timing, and the gasoline pump is responsible for supplying fuel to it; how the ignition controller and the ignition coil perform ignition are all controlled by the ECU.