The EFI diesel engine adopts sensors such as speed, accelerator pedal position, injection time, intake temperature, intake pressure, fuel temperature and cooling water temperature. At the same time, the real-time detected parameters are input into the computer (ECU), compared with the stored set parameter values or parameter MAP maps, and the instructions are sent to the actuator according to the optimal value or the calculated target value after processing and calculation.

The actuator controls the fuel injection quantity (the position of the fuel supply rack or the closing duration of the solenoid valve) and the fuel injection timing (the starting point of the opening and closing of the timing control valve or the closing of the solenoid valve) according to the instruction of the ECU, and controls the actuators such as the exhaust gas recirculation valve and the glow plug to make the diesel engine reach the best running state.

Extended data

Use and maintenance of EFI diesel engine: EFI system has been widely used in vehicles at home and abroad. The system uses the parameter signals detected by various sensors to represent the working conditions of the engine, which is calculated, analyzed and compared by the electronic control unit (ECU), and the fuel injection quantity is controlled according to the needs of various working conditions of the engine, thus ensuring that the engine has good power, economy and emission.

The electronically controlled fuel injection engine is complex in structure, improper in use and maintenance, prone to failure, and even lead to system damage. Therefore, when using and maintaining the electronically controlled fuel injection engine, we should master some common sense knowledge.

Baidu encyclopedia-EFI engine

Baidu encyclopedia-EFI diesel engine