摘要
分析了26辆国六轻型汽油车在NEDC、WLTC循环工况与RDE工况下的排放试验结果。结果表明:在不同工况下,国六轻型车CO与THC的符合性因子基本低于0.6;NOx排放在RDE工况下的符合性因子可适当降低;RDE工况下的PN排放成为目前国六轻型车需要关注的重点,其中直喷汽油车PN排放较高;直喷汽油车在实际道路行驶工况下的PN排放与车速、加速度存在较强的相关性,PN排放主要集中于车速高于50 km/h且加速度大于0.5 m/s^2的加速工况内;RDE工况下冷起动过程中车辆的CO与PN排放较高,是否包含冷起动过程,对RDE试验结果产生的影响较大。
The emission test results of 26 China Ⅵ lightduty gasoline vehicles were compared based on the NEDC cycle,WLTC cycle and RDE test.The results show that the conformity factors of CO and THC emissions under different test conditions are generally lower than 0.6 and that of NOx emissions under RDE condition can be appropriately decreased.The PN emission of RDE condition becomes the main focus of China Ⅵ light-duty vehicles,in which the PN emission for the direct-injection gasoline vehicles is relatively high.The PN emission of the direct injection gasoline vehicle under the RDE condition has a strong correlation with the vehicle speed and acceleration and the PN emission mainly concentrates under the conditions with the vehicle speed higher than 50 km/h and the acceleration greater than 0.5 m/s^2.The CO and PN emissions during the cold start under RDE condition are relatively high and whether the cold start process is included will have a great impact on the RDE test results.
作者
罗佳鑫
温溢
杨正军
朱庆功
潘朋
LUO Jiaxin;WEN Yi;YANG Zhengjun;ZHU Qinggong;PAN Peng(China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300,China)
出处
《车用发动机》
北大核心
2019年第6期64-70,共7页
Vehicle Engine
基金
中国汽车技术研究中心有限公司2018年度重点项目(18190213)
