【摘要】 在车用压缩天然气中,甲烷的平均含量在87%左右,还含有数量不等的乙烷、丙烷、丁烷和少量的二氧化碳、氢等。这些甲烷以外数量不等的成分对天然气的性能影响很大。根据GB184047-2000,虽属同类气体,但沃泊指数W和燃烧速度指数CP变化很大,因此引起发动机的性能和排放发生变化。其中丁烷对沃泊指数W影响最大;乙烷对燃烧速度指数CP影响最大。更多还原

【Abstract】 CNG used on automobiles contains about 87% CH4,and some C2H6,C3H8,C4H10 and little CO2 and H2 also.Except CH4, these compositions greatly affect the performance of natural gas.According to GB 184047-2000,these kinds of nature gas change in Ober number and number of combustion velocity greatly,thus the engine power and emission change obviously.C4H10 affects Ober number the most,and C2H6 affects the number of combustion velocity the most.更多还原