Electronic diesel injection system consists of sensors, ECU (computer) and the implementing agencies composed of three parts. Its mission is to electronically controlled fuel injection system, fuel injection volume, and the realization of the injection timing with the operating status of the real-time control. Using speed, temperature, pressure sensors, real-time detection parameters will be entered into the computer simultaneously, and had been stored values of the parameters of comparison, has been treated in accordance with the calculation of the best value on the fuel pump, exhaust gas recirculation valve, such as preheating Cypriot implementing agencies control, driven fuel injection system to achieve the best diesel engine operating status. What is the common rail technology, why should adopt common rail technology?

In the automotive diesel engine, high-speed operation of the diesel injection process only time per 1,000 seconds, experimental shows that in the process of high-pressure injection tubing pressure throughout with time and location of the different change. As diesel compressibility and high pressure tubing pressure fluctuations in diesel, the actual fuel pump and injector status under the law of supply plunger greater difference. Tubing, sometimes the pressure fluctuations in the main jet, so that the pressure within the high-pressure pipeline rose again, reaching the injector pressure to open the valve, the valve has been closed and reopened the secondary injection phenomenon, Because it is impossible to burn the second injection, so an increase of smoke and hydrocarbons (HC) emissions, fuel consumption increases. In addition, each spray cycle of the high-pressure pipeline residual pressure will change the ensuing instability arising from the jet, especially in the low-speed region prone to this phenomenon, not only serious injection uneven, but will not spray in intermittent phenomenon. In order to resolve this diesel engine fuel pressure changes shortcomings, the modern use of a diesel engine known as the "Common Rail" technology.