Common Rail Diesel Engine Electronic fuel injection technology is a new technology, because it integrates a computer-controlled technology, modern sensor detection technology and advanced fuel injection in a structure. The technology is the main characteristics: the application of advanced electronic control devices and switches with high-speed electromagnetic valve; way using common-rail fuel supply; high-speed high-frequency electromagnetic-off valves, control flexible system architecture for transplantation, to a wide range. This is hot technology research and development: high-pressure common rail system to solve the constant high-pressure sealing; solve the high-pressure common rail systems, Common Rail pressure on the tiny fluctuations caused by injection of uneven; solve the high-pressure common rail systems Multi-MAP (3-D control data sheet) optimization problem and solve the structure, frequency electromagnetic-off valve design and manufacturing process of the key technical problems. Common Rail fuel injection technology helps to reduce diesel exhaust emissions, and to improve the noise, fuel consumption, and other aspects of the comprehensive performance in environmental protection is conducive to the Earth at the same time, but will also promote the diesel engine industry, with the auto industry and The development of related industries.