High-pressure common rail technology is the means, pumps, pressure sensors and closed-loop system composed of ECU, will be the selection of injection pressure and injection process in a completely separate their supply, high-pressure pumps from the high-pressure fuel pipeline for conveying to the public, Through the public for the hydraulic tubing to achieve precise control, high-pressure tubing pressure size has nothing to do with the engine speed, engine oil can be drastically reduced pressure with engine speed changes, therefore, you reduce the shortcomings of the traditional diesel engine. ECU control the injector fuel injection quantity, depends on the size of the fuel injector rail (public for tubing) solenoid valve opening pressure and the length of time. Electronically controlled common rail fuel injection common rail technology, directly or indirectly, through the formation of a constant high-pressure fuel delivered to each injector, and the help of integration in each injector switch on the high-speed electromagnetic valve open and closed , time, and quantity control of the injector jet fuel to the engine combustion chamber, thus ensuring the best diesel engine combustion ratio and good atomization, and the best time of the ignition, the ignition enough energy and the least polluting emissions. Common Rail Fuel Injection Device was successfully developed in recent years is that the ideal of a high-pressure fuel injection devices. In a shared track and the pressure of injection, respectively. Injection pressure can be as high as 16 O MPa. Its pressure on memory and distributor of rail Transcatheter to mouth. Use the controller to a pulse signal injection into the solenoid valve caused a jet. Through the nozzle pressure and open storage duration to regulate fuel. Currently, the various devices in the European automotive diesel engine have been widely used, and experts believe that this is a Europe able to meet future ��, Europe V the most potential for improvement of fuel injection devices. At the same time, reducing the nozzle diameter, to increase the number reduced nozzle hole diameter, a few more holes, can improve fuel atomization and uniformity of the distribution, reducing ignition delay, reduce particulate emissions and NO.