CAJ | 학술논문

通过模拟发动机冷却水废热回收利用的水浴加热法，对流经喷油泵后高压油管的乙醇柴油混合燃料进行预热升温，以探讨不同乙醇柴油配比及其热强化对发动机性能、常规与非常规污染物排放特性的影响。试验结果表明，与常温燃油相比，乙醇柴油热强化有利于降低发动机在低转速和部分负荷工况下的当量燃油消耗率及其HC排放，而其碳烟和NOx排放无明显变化；乙醇柴油热强化还可降低乙醛、丙酮和乙醇等非常规污染物排放，但会使中低转速工况下的甲醛的排放稍有增加。
통과모의발동궤냉각수폐열회수이용적수욕가열법，대류경분유빙후고압유관적을순시유혼합연료진행예열승온，이탐토불동을순시유배비급기열강화대발동궤성능、상규여비상규오염물배방특성적영향。시험결과표명，여상온연유상비，을순시유열강화유리우강저발동궤재저전속화부분부하공황하적당량연유소모솔급기HC배방，이기탄연화NOx배방무명현변화；을순시유열강화환가강저을철、병동화을순등비상규오염물배방，단회사중저전속공황하적갑철적배방초유증가。
The performance and exhaust emission of a DI diesel engine running on ethanol-diesel blends at normal and elevated fuel temperatures were evaluated experimentally. The temperature of the blended fuel was increased by heating the post-pump high pressure fuel pipe. The effects of blended fuel temperature and different blends of ethanol-diesel on engine performance,regulated and unregulated emissions were studied. The results show that increasing the blended fuel temperature was beneficial for the reduction of equivalent fuel consumption and HC emission under part-load and low speed engine operation while brought about no significant changes to smoke and NOx emissions as com-pared with operation at normal fuel temperature. It is also found that increasing the blended fuel temperature resulted in the decrease of acetaldehyde,acetone and ethanol emissions,but the increase of formaldehyde emission at low engine speed.