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设计了一种简单的阀片式变涡流控制系统。在螺旋气道中安装一适当形状的阀片，可在较大范围内连续调节涡流比。在充气效率不受影响的情况下，本涡流控制系统可使涡流比在０．３５～１．６８之间变化。通过在稳流吹风试验台上的大量试验，对阀片形状，包括阀片外形和逆流弯角进行了优化。将本系统应用在汽油机直接喷射分层燃烧系统中，发动机的综合性能，尤其是低负荷下的排放性能有了较大的改善。试验表明，当涡流比在１．０～１．５之间变化时，所研究的直接喷式汽油机在低负荷工况下ＣＯ、ＨＣ和ＮＯｘ的排放水平较低。
A simple valve vortex control system is designed. In the spiral airway to install a suitable shape of the valve, the vortex ratio can be continuously adjusted in a wide range. In the case of inflatable efficiency is not affected, the eddy current control system can make eddy current ratio between 0.35 ~ 1.68 change. Through a large number of tests on a steady flow blower, the valve shape, including the profile of the valve and the countercurrent bend, were optimized. The system is applied to the direct injection stratified combustion system of gasoline engine, and the comprehensive performance of the engine, especially the discharge performance under the low load, has been greatly improved. Experiments show that when the eddy current ratio varies from 1.0 to 1.5, the direct injection gasoline engine under study has low CO, HC and NOx emissions under low load conditions.