【摘要】 应用自行开发的柴油机过渡工况控制系统及排气采集装置,模拟柴油机实际工作时的增负荷状态,对HC排放特性进行了试验研究。利用气相色谱仪对HC排放成分进行分析。研究结果表明,增负荷工况中HC排放量急剧增加,其中碳数在8以下的低沸点成分占有很大的比例,对于总的HC排放特别是增负荷开始后的HC排放起着主导作用。在低沸点的HC排放成分中,乙烯和丙烯所占的比例最大,乙烯在各个循环中约占40%。更多还原

【Abstract】 A transient operation control system and an exhaust collection system at transient operation were developed, and HC emission behavior from single-cylinder DI diesel engine simulating practical sudden load-up condition has been investigated experimentally. Components in HC emission were analyzed by gas chromatography. Experiment results showed that HC emissions increased sharply at the beginning of sudden load-up. Volatile components below C₈ were main components that played predominant role in overall HC emission and especially at the beginning of sudden load-up. Among these volatile ingredients, ethylene C₂H₄ and propylene C₃H₆ were major components, and C₂H₄ component for about 40% of total.更多还原