Technology is high-pressure common rail pumps, pressure sensors and closed-loop system consisting of ECU, the pressure will spray and spray a completely separate from each other during a fuel supply, high-pressure pumps from the high-pressure fuel delivery to the public for the pipeline, Through the public for the oil pipeline to achieve precise control, high-pressure tubing pressure size has nothing to do with the engine speed, engine oil can greatly reduce the pressure on the engine speed changes, thereby reducing the shortcomings of the traditional diesel engine. ECU fuel injection control of the injector, depending on the size of the fuel injector rail (public for the pipeline) pressure and electromagnetic valve opened the length of time. Common Rail electronically controlled common-rail fuel injection technology, directly or indirectly, through the formation of the constant high-pressure fuel distribution to each injector and the help of integration in each injector on the high-speed electromagnetic switch the valve open and closed , Regular, quantitative control injector jet fuel to the engine combustion chamber, thus ensuring optimal combustion engine and good than the atomized, and the best time of the ignition, enough for at least the ignition energy and pollution emissions. Common Rail fuel injection devices are successfully developed in recent years and was considered to be the most ideal of a high-pressure fuel injection devices. In a shared orbit were generated pressure and spray. Injection pressure can be as high as 16 O MPa. Its pressure on memory and the rail splitter of the catheter to mouth. Controllers use the spray on a pulse of electromagnetic signals into valve caused a jet. Through the nozzle and open the storage pressure to regulate the duration of oil. At present, the various devices in the European automotive diesel engine has 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-diameter nozzle, increasing number of holes, can improve fuel atomization and distribution uniformity and reduce fire lagged behind, and reduce particle emissions NO.