车用燃油改液化天然气（LNG）的应用研究

本文对两台北奔牵引车柴油发动机改为液化天然气（LNG）发动机进行研究，对改装后的LT^TC汽车进行调试、检验、道路试验及现场拉运，通过对三个多月的现场拉运试验数据统计分析，结果表明在保持原车动力性基本不变的情况下，整车运行成本比用柴油降低43．6％，整车尾气排放达到国Ⅳ标准，用两年左右的时间就可收回全部投资。

Two diesel engines （BEIBEN Truck）were changed by Liquefied Natural Gas（LNG） engines and the performance had been tested for more than three months. The results show that ,in the condition d keeping the performance o~ the truck,operating cost d the two modified trucks is 43. 6% lower than that using the diesel engines and the exhaust emissions meet the national standard IV. h will take two years to recoup the investment.