The constant speed and full-load characteristics tests showed that the system had great potential to improve the engine economic performance and exhaust emissions.
通过对发动机进行的负荷特性和外特性对比试验结果表明，高压共轨电控喷油系统在提高发动机经济性和改善排放方面具有巨大潜力。
During the combustion process of gasoline engine, adding some hydrogen partly has good effect on improvement of gasoline engine performance and reduction of exhaust emissions.
在汽油机的燃烧过程中加入部分的氢气进行燃烧，可对发动机的性能改善和废气排放物的降低起到良好作用。
How to save energy and control the exhaust emissions while improving engine performance are the main topics people caring about.
同时，随着法规的逐渐严格，怎样在降低排放同时提高发动机的性能已经成为现在人们关心的最主要问题之一。
The power performance, fuel economy and exhaust emissions of engine is directly related to its working process, and the research on the working process is one of the main methods of engine research.
内燃机的动力性、经济性及排放性指标与其工作过程进行的好坏直接相关，对工作过程进行研究是内燃机研究的主要方法之一。
The test results showed that with the help of this system, the power performance, fuel economy and exhaust emissions of the engine were improved obviously.
试验结果表明，采用该控制系统后，JL 462 Q汽油机的动力性、经济性及排放指标均得到了明显的改善。
The test results showed that with the help of this system, the power performance, fuel economy and exhaust emissions of the engine were improved obviously.
试验结果表明，采用该控制系统后，JL 462 Q汽油机的动力性、经济性及排放指标均得到了明显的改善。
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