2. Modern car engine electronic control system of new technologies

Time control of the diesel engine technology EFI EFI system uses a new generation of the time control, high-speed electromagnetic valve to replace the traditional mechanical spray valve, the digital high-pressure fuel regulation. This is now gradually to the high-pressure injection system of forward, high pressure water jet can atomized very small diesel engine combustion process to be very sound, and speed, while not significantly improve the combustion temperature. Increased pressure direct injection diesel engine, can not only reduce the overall HC, CO, NOx, and carbon particles of smoke emissions, but also significantly reduce fuel consumption.

EFI system in the Common Rail Diesel vehicles, high-speed operation of the diesel injection process only a few seconds per thousand, in the process of spraying high-pressure pipeline pressure around with time and location of the different and changing. As the compressibility of diesel and diesel high-pressure pipeline in the pressure fluctuations, so that the actual state of the fuel injector and fuel pump under the laws of supply plunger a greater difference. Tubing, sometimes the pressure fluctuations in the main jet, high-pressure tubing to the pressure rise again, to make the injector needle to open the pressure, the valve has been closed and reopened the secondary injection phenomenon, As the second injection can not be completely burning, so an increase of smoke and hydrocarbons (HC) emissions and increase fuel consumption. In addition, each spray cycle of high-pressure pipeline, after the residual pressure will be changed, then the jet caused instability, particularly in low-speed region prone to this phenomenon, not only when a serious injection uneven, it will not happen intermittent spray Phenomenon. Diesel fuel to address the shortcomings of the pressure changes, adopted a modern diesel engine called "common rail" technology.