It is the engine of a high-pressure injection system, the maximum pressure can reach 200 ~ 220 MPa. The system is no longer a universal principle of the pulse, but by the time pressure measurement principles. "Common Rail Injection" is the common high-pressure oil tank, and spray electromagnetic valve control to achieve a combination of fuel injection control. This fuel injection system can not guarantee injection pressure with a few changes to the engine, can reduce the particulate emissions, electric control spray, also known as common rail injection pressure of time or third-generation jet, which can be divided into the pressure common rail high-pressure common rail and Two categories. ECU the electrical pulse in order to trigger injector electromagnetic valve to determine each engine fuel injection and the closure of the initial moment, electronically controlled common-rail injection can be used repeatedly spray flexible way to control the rate of fuel injection. U.S., Japan, Germany, Italy and other countries have been mass production of EFI Common Rail system, which will on behalf of the future diesel engine fuel injection system of the mainstream. German Mercedes-Benz C200 sedan, the use of electronically controlled common rail injection system, its power, torque and emissions, and other indicators in the world's leading level. Computer control high-pressure common rail diesel injection system .