【摘要】 改造制成了如下的柴油机系统:将乙醇通过安装在柴油机排气管上的小型高效换热器,在没有外部加热的情况下吸收尾气余热,部分热解后混合气体由进气道通入柴油机燃烧室改善燃烧。前面的研究表明,该系统可以有效节油。为了研究该系统对柴油机碳烟和NOx排放的影响,在该系统上进行了定功率-不同转速和额定转速以及不同功率下的实验研究。研究结果表明,该系统在小功率-低转速工况下碳烟排放降低不明显,其它工况可实现碳烟排放的有效降低,最高可降低35.7%;在全工况条件下可实现NOx排放的有效降低,最高可降低64.7%。功率和转速越高,碳烟和NOx排放量随着增加,污染物排放降低效果越好。对污染物排放降低的原理进行了分析。更多还原

【Abstract】 The following diesel system was formed through a reconstruction:through a small-sized high efficiency heat exchanger installed on the exhaust gas pipe of a diesel,the ethanol absorbed the waste heat of the exhaust gas under the condition of having no heat from the outside world and after partially pyrolyzed,the mixed gas was fed into the combustion chamber of the diesel to improve the combustion via the gas inlet passage.The research results show that the system under discussion can effectively save oil.To study the influence of the system on the soot and NOx emissions of the diesel,an experimental study was performed of the system at constant power-various speeds and rated speed-various powers.It has been found that the reduction of soot emissions of the system under a small power-low speed operating condition is not conspicuous,capable of being lowered by 64.7% to the maximum extent.The higher the power and rotating speed,the greater the soot and NOx emissions and the better the effectiveness of the reduction of the pollutant emissions.The principle for reducing the pollutant emissions was analyzed.更多还原