传统的柴油机喷油器针阀升程测量方式多为接触式。
Traditionally, the way to measure the needle displacement of oil injector is of contact pattern.
汽车经长时间使用后，喷油器针阀表面会形成少量积碳，影响其喷油质量。
After the motor vehicle is used for a long time, a little carbon deposit is formed in the needle valve surface of fuel injector and the fuel injection quality will be affected.
结果表明：节流孔板是电控共轨喷油器的重要构成部分，既控制着唢油嘴针阀的开启速度，义控制着喷油率的形状。
The results show that, as important components of electronic injector used in common rail system, orifices affect on the open rate of nozzle needle and injection rate shapes.
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