With emissions regulations and fuel economy requirements continue to increase, the requirements for diesel engines have become more sophisticated, the first is the common rail nozzle injection technology.
First,Bosch common rail nozzle in order to reduce combustion noise, requiring pre-spray; in order to make fuel combustion from the cylinder to reduce emissions and make particulate matter trap regenerated, be required to make up after the main jet spray. Well for fuel atomization, it is necessary to increase the number of fuel injection holes, the hole injection reduced diameter, but this will lead to a decline in the rate of injection. To ensure adequate injection rate, it is necessary to improve the fuel injection pressure. In order to achieve the multiple injection, it is necessary to improve the response characteristics of the fuel injection system. These requirements determine the direction of development of common rail fuel injection technology.
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