These techniques would improve practical measure - control means of automobile emission . consequently , this test system can analyze the actual emissions o f vehicle limited in definite range , which can reach the aim of keeping city atmosphere and environment better 这些技术的应用，必将使本测试系统的实用检测手段得到提高，从而准确分析车辆的实际排放水平，使其限定在被允许的范围内，以达到保持城市空气质量良好，维护生态环境的目的。
The results of the experiments show that the soot emission decreased greatly and the nox emission was improved , while co and hc emission increased but still lowered than gasoline engine , the power output and torque of the engine have not been influenced and the specific energy consumption was improved 试验结果显示，这种新型的燃烧模式不仅改善了发动机的碳烟排放，而且no排放也得到了改善，而hc 、 co排放则较原机严重，但还是低于汽油机的排放水平；发动机的动力性能未受影响，能耗率有所改善。
