缸内直喷混合燃料发动机的性能研究

采用了一套定压配比燃料供给系统，通过向缸内直接喷射混合气，经电控系统精确控制喷射量，对天然气掺氢的发动机性能进行分析研究。结果表明，发动机燃用天然气掺氢燃料通过定压配比直喷技术，可以提高充气效率，与纯天然气发动机相比能够提高发动机动力和排放性能。

The Research on the Performance of a Direct Injection Engine Fueled with Natural Gas-Hydrogen Blends

An admixture fuel CNG engine with in-cylinder direct injection technology was transformed from a gasoline. The electronic controlled system controls exactly the ignition timing injection quantity and timing to research the performance of the engine. Dynamometer tests show that, compared to the CNG engine, the engine mentioned above can not only keeps its index of dynamic response but also decreases CO and HC emissions, and increases NOx emission at the same time.