CNG/LNG和LPG汽车动力性研究状况

State of Power Performance Research on CNG/LNG and LPG Vehicles

CNG/LNG、LPG等气体燃料具有资源丰富、排放污染物少等特点,是汽车较为理想的替代燃料。但是燃气汽车普遍存在动力性下降的问题,国内外许多机构在这方面开展了广泛地研究工作。研究表明,液态LPG喷射对解决LPG发动机动力性下降问题效果比较显著;CNG缸内直接喷射技术,从根本上解决了预混合方式中,天然气燃料挤占进气空气体积,造成充气效率下降的问题;LNG具有能量密度高、安全、排放低等特点,更具发展潜力。

Such gaseous fuels as CNG/LNG and LPG are preferred to be alternative fuel of cars for their advantages of being abundant in resources and less pollution emissions. But the common problem of the engine power deterioration, existing in gaseous-fuel vehicles, has restricted the development. Therefore, many institutions at home and abroad have done extensive research work on this aspect. Researches show that the technique of liquefied LPG injection have significant effect on increasing engine power performance and CNG direct injection technology has fundamentally solved the problems that engine charge efficiency drops resulted from nature gas occupying the room of entering air in normal pre-mixed form. This technology can effectively enhance the gaseous fuel engine power performance and LNG has such characteristics such as high density of energy, safety and less emissions. So it will become the main development direction of nature gas vehicles in the future.