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1·It is found that there are optimum swirl ratio and spray Angle for better evaporation and combustion.

喷雾锥角对发动机蒸发和燃烧过程有显著的影响，存在一个最佳的喷雾锥角使上述过程达到最优。

2·How to select the induction Swirl ratio for improving the performance of DI engine is investigated and tested.

通过试验研究，阐述了如何合理选取进气涡流强度，以改善柴油机的性能。

3·The swirl ratio and flow coefficient can be obtained through the traditional steady flow test in diesel helical intake port.

对某柴油机螺旋进气道进行传统的气道稳流试验，得到了涡流比和流量系数。

4·The characteristic of helical inlet port including swirl ratio and flow coefficient has an important effect on the performance of diesel engine.

螺旋进气道特性(涡流比、流量系数)对柴油机性能有重要影响。

5·The design of port is depended on steady flow test to obtain swirl ratio and flow coefficient and use them to evaluate the performance of intake port.

长期以来进气道的设计主要是依靠气道稳流试验测量其涡流比和流量系数来评定气道的性能。

6·The effects of different intake swirl ratio on the performances and exhaust emissions of diesel engine were investigated based on the experiment data.

试验结果表明，发动机在高、低速区的最佳进气涡流强度是不同的。

7·In addition, the effects of the swirl ratio and the diameter of the nozzle hole on the combustion process and the NOX emissions also were investigated.

此外，研究了涡流强度和喷孔直径对柴油机燃烧过程以及NOX排放的影响。

8·Experiment results show that the rotating valve has a guide role and has a broader adjusting range to the intake swirl ratio than the vertical valve has.

试验结果证明，转阀具有导向作用，采用转阀对进气涡流进行调节比用挡板具有更大的调节范围。

9·The method can be used for combustion Chambers with any shape to match the fuel injection pressure, nozzle construction, injector position and intake swirl ratio with chamber shape.

该方法可适于任意形状的燃烧室，能反映出喷油压力、喷油嘴结构及安装位置、进气涡流比等参数与燃烧室形状的匹配关系。

10·The results show that at any Angle between axes of inclined swirl control valve and crank shift, flow coefficient and inclined swirl ratio increase gradually with increase of valve opening.

研究结果表明，在任意可变斜轴涡流控制阀轴线与曲轴轴线夹角情况下，流通系数和无因次斜轴涡流比随着阀片开度的增大而逐渐减小。