国五国六工况下轻型车排放特性研究

发布时间：2018-04-30 23:10

本文选题：WLTC + NEDC　；参考：《环境科学与技术》2016年S2期

【摘要】：在全流稀释排放测试系统上,对一辆满足国五排放标准的汽油车,分别在WLTC和NEDC工况下进行了车辆常规污染物排放特性的研究,同时使用Silver scan tool对发动机性能进行了测试。结果表明,车辆在WLTC工况的前3个阶段与NEDC工况下发动机性能及排放特性都比较相近。在WLTC超高速工况下发动机转速、机油温度、进气量、负荷值、CO排放都明显上升。对比分析排放特性可知,WLTC工况下THC和NOx的最终测试结果要低于NEDC工况,但CO_2在2种工况下的结果相差不大。另外,由于CO在超高速工况下的排放量急剧增长,WLTC工况下CO排放结果远大于NEDC工况。因此,超高速工况应该成为今后国六标准中研究的重点。
[Abstract]:Based on the full-flow dilution emission test system, the emission characteristics of a gasoline vehicle satisfying the national five emission standards were studied under the WLTC and NEDC conditions, and the engine performance was tested by Silver scan tool. The results show that the engine performance and emission characteristics in the first three stages of WLTC are similar to those under NEDC. The engine speed, engine oil temperature, air intake and CO emission increased obviously under the WLTC superhigh speed working condition. By comparing and analyzing the emission characteristics, it can be seen that the final test results of THC and NOx are lower than those of NEDC, but the results of CO_2 under the two conditions are not different. In addition, due to the rapid increase of CO emissions under ultra-high speed operating conditions, the results of CO emissions under WLTC conditions are much larger than those under NEDC conditions. Therefore, the ultra-high-speed working condition should become the focus of the six national standards in the future.
【作者单位】：中国汽车技术研究中心;中国环境科学研究院;北京市机动车排放管理中心;
【分类号】：X734.2

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