不同负荷CNG/汽油两用燃料电控发动机排放物对环境影响研究

CNG/汽油两用燃料发动机的开发是交通运输领域解决能源危机和环境污染的问题最为便捷和有效的途径.基于一台4RB2电控汽油机加装顺序喷射天然气系统,在完成动力性标定的基础上,开展了发动机在不同负荷CNG/汽油两种燃烧模式下,能量消耗和NOx、HC、CO等有害排放物对环境影响研究.结果发现,各测试负荷工况下,发动机燃用CNG的能耗比燃用汽油的低,NOx、HC、CO三种有害排放物亦优于汽油燃烧模式,说明了CNG作为点燃式发动机燃料对保护环境的优越性.

Study on Environment Impact of Emissions from Electronically ControlledCNG/gasoline Flexible-fuel Engine under Different Loads

The development of CNG/Gasoline flexible-fuel engines is an effective and efficient way to solve energy crisis and air pollution problems in the transportation sector.The study on environment impact of energy consumption and engine-out emissions (NOx, HC, CO) between CNG and gasoline under different loads was carried out on an electronically controlled engine, 4RB2, after the calibration based on power performance.It is found that when the engine is fueled with CNG, the energy consumption and all three harmful emissions are significant lower than those fueled with gasoline under all tested conditions.It shows the advantages of CNG as fuel for spark-ignition engines to protect the environment.