It is the engine of a high-pressure injection system, the maximum pressure of 200 to 220 MPa. The system is no longer the pulse of a universal principle, but instead used the time pressure measurement principle. "Common Rail Injection" is the common high-pressure cylinder oil, and jet solenoid valve control to achieve a combination of fuel injection control. This injection system can guarantee that with the injection pressure not to the number of engine changes, which reduces particulate emissions, electronically controlled common rail injection pressure of time is also known as the third-generation jet or jet, which can be divided into pressure in the common rail and High Pressure Common Rail two categories. ECU electrical pulse generated sequentially trigger injector solenoid valve to determine each injection engine and the closure of the initial moment, electronically controlled common rail injection can be used repeatedly spray approach to the flexible control of fuel injection rate. The United States, Japan, Germany, Italy, and other countries have large-volume production of EFI common rail system, which will on behalf of the future of the diesel engine fuel injection system mainstream. Germany Mercedes-Benz C200 sedan, a Common Rail EFI system, its power, torque and emissions, and other indicators in the world leading level. Computer Control of High Pressure Common Rail Diesel injection system shown in figure