Electronically controlled high-pressure common-rail fuel injection system is characterized by: injection timing and fuel injection control of mutual independence, injection pressure and duration of fuel injection engine load and speed from the impact of the injection pressure of the tank, fuel injection And the starting point of injection are free to adjust to achieve the injection timing, fuel injection and injection rate of the optimal control; jet spray reliable and high pressure, to achieve a variety of laws, such as fuel injection. These characteristics of the diesel engine to achieve efficient, clean, low noise of the combustion process played a significant role.

Electronically controlled high-pressure common-rail fuel injection system has the advantages of flexible adjustable injection pressure at different load and speed can determine the best injection pressure. At the same time as the injection is achieved, the fuel injector and injection rate of the optimal control, improved as a result of the diesel combustion process and reduce the exhaust particles and NO-X emissions and reduce the combustion noise. Besides its fuel economy improvements are also very obvious. At present, controlled high-pressure common-rail fuel injection system is the development trend of higher jet pressure (200 MPa), a smaller jet-straight 41 (0.11 ~ 0.13 mm), a shorter response time (0.1 ms), lower power Consumption (using piezoelectric crystal injector) and function better software. Electronically controlled high-pressure common-rail fuel injection system is the inadequacy of the system is more complicated; In order to achieve precise control, the accuracy of the sensor higher pressure common-rail with the continuous improvement of the various components of the Common Rail system performance requirements Increasingly harsh. In addition, the power to control common-rail fuel injection system, the need for engine structure corresponding improvement, especially on the cylinder head design. The above decision of the electronically controlled common-rail fuel injection system of relatively high cost.