作　　者： ; ; ; ; ;

机构地区： 无锡油泵油嘴研究所

出　　处： 《内燃机学报》 2014年第2期131-137,共7页

摘　　要： 通过一台V6发动机研究了柴油中掺混正丁醇和异丁醇在不同转速、不同EGR率和喷油时刻下对燃烧与排放性能的影响.结果表明:正丁醇-柴油燃料比异丁醇-柴油混合燃料着火滞燃期短,异丁醇缸内峰值压力和预混放热率比正丁醇高.柴油中掺混正丁醇和异丁醇可以明显降低碳烟排放,使得碳烟随着EGR率变化变得平缓.同时掺混正丁醇对碳烟降低的效果更明显,而且掺混丁醇对NOx排放影响不大,一氧化碳与碳氢排放保持在较低水平.最后柴油机燃用丁醇可以达到同时降低碳烟和NOx的效果. Combustion and emissions of a V6 diesel engine fuelled with n-butanol/diesel and iso- butanol/diesel blends at different engine speeds, EGR rates and injection timings were studied. Results show that n-butanol/diesel blends give shorter ignition delay compared with that of iso-butanol/diesel blends. Iso-butanol has higher peak cylinder pressure and premixed heat release rate than those of n- butanol, n-Butanol and iso-butanol blended in diesel can significantly reduce soot emissions. Soot emission becomes insensitive to the increase of EGR rate. Soot emission decreases more effectively fuelled with n- butanol than that fuelled with iso-butanol. Butanol blending has little effect on NOx emissions. Carbon monoxide and total hydrocarbon emissions keep a low level. Diesel engine fuelled with butanol can simul- taneously reduce smoke and NOx emissions.

关 键 词： 柴油机 正丁醇 柴油 异丁醇 柴油 碳烟 燃烧与排放

领　　域： [动力工程及工程热物理]