国内外燃气汽车发动机研究动向

通过对燃气汽车发动机供气方式的试验研究以及对国内外在燃气发动机领域研究成果的分析,阐述了影响燃气汽车动力性的因素,指出进气道液态LPG喷射较好地解决了充气效率下降的问题,缸内液态LPG直接喷射效果更佳,是解决LPG发动机动力性下降的有效途径之一。CNG缸内直喷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造成充气效率下降的问题,可有效提高CNG发动机的动力性。LNG纯度高、存储体积小、安全可靠,续驶里程长,比CNG更具发展潜力。

Research Tendency of Alternative Fuel Vehicle Engine at Home and Abroad

Through the experiment researches on gaseous fuel supplying methods of an alternative fuel vehicle engine,and bying achievement analyses in the field of alternative fuel vehicle engine research at home and abroad,this article points out the facts which influence the power performance of alternative fuel vehicle.Liquefied LPG injection at intake port solves the problem of charge efficiency decrease well.Liquefied LPG direct injection has more efficiency than that injection at intake port and is one of efficiency ways to solve the problem of LPG engine power drop.CNG direct injection technology fundamentally solves the problems which nature gas occupies the room of entering air and engine charge efficiency drops in normal pre-mixed form.The technology can effectively enhance CNG engine power performance.LNG vehicle has development potentiality even more continuously because of its higher purity,smaller deposit tank,more secure and reliable,longer sailing mileages.