EFI in diesel and gasoline engines in the main difference is that the gasoline engine is electronically controlled injection system controlled air-fuel ratio (the ratio of air and gasoline), diesel EFI system is by controlling the fuel injection time to adjust the size of output, And diesel fuel injection engine control by the speed and accelerator pedal position (drawbars throttle position) to decide. Therefore, the basic working principle is based on computer speed sensor and throttle position sensor input signal, first calculate the basic fuel injection quantity, and then under the water temperature, into the temperature, air pressure sensors that signal, and again from the set of control Location of the sensors that signal feedback, to determine the optimal amount of fuel injection.

Electronically controlled diesel injection system of sensors, ECU (computer) and the implementing agencies, and other components. Its task is to control the conduct of electronic fuel injection system, and the fuel injector and injection timing of the operation condition of the real-time control. Use of speed, temperature, pressure sensors, real-time detection of parameters simultaneously entered into the computer, and the parameters have been stored value, processed in accordance with the best value for calculating fuel pump, exhaust gas recirculation valve, preheat Cypriots, such as implementing agencies Control, drive fuel injection system, to achieve the best engine operational status.

As the world's urban transport vehicles sharp increase in diesel engine exhaust emissions in the Earth's environment has become the main source of pollution. Countries in the world has begun to find and to take effective measures take the initiative to reduce and control the emission of pollutants. Common Rail Diesel Engine Electronic fuel injection technology is a more successful pollution control emissions from new technologies.