重型国六发动机细颗粒物排放研究  

Research on the Emission of Sub-23nm Particles for China VI Heavy-duty Engines

作　　者：张鸿杰 高磊 陶汉国[1,2] 徐富强 Zhang Hongjie;Gao Lei;Tao Hanguo;Xu Fuqiang

机构地区：[1]中国汽车技术研究中心有限公司,天津市300300 [2]天津索克汽车试验有限公司,天津市300300

出　　处：《时代汽车》2023年第8期4-6,13,共4页Auto Time

摘　　要：随着排放法规的不断升级,对于10nm以上颗粒物排放进行管控的需求持续增强。为探究23nm以上颗粒物数量(PN23)和10nm以上颗粒物数量(PN10)排放特性差异,本文选用一款符合国六标准的重型柴油发动机,在发动机台架上运行重型车实际道路车载法排放试验循环(PEMS),冷热态WHTC循环和WHSC循环,使用颗粒物计数器对试验中PN23和PN10同时进行采样测量。结果表明,PN10和PN23的瞬态排放规律基本一致;各次试验中PN10比排放结果均显著高于PN23,但对于不同测试循环,PN10和PN23排放差异有所不同;虽然PN10比排放结果显著高于PN23,但其结果仍可满足国六排放法规要求,在法规限值不加严的前提下,现有DPF技术可以应对由PN23向PN10的切换。With the continuous upgrading of emission regulations,the demand for controlling the emission of sub-23nm particle continues to increase.In order to explore the diff erences in emission characteristics between particle number with diameter above 23nm(PN23)and particle number with diameter above 10nm(PN10).The actual on-road emission test cycle(PEMS),cold and hot WHTC cycle and WHSC cycle were run on the engine bench based on a heavy-duty diesel engine conforming to China VI,PN23 and PN10 were sampled and measured simultaneously using a particle counter.The results show that the emission of PN10 is signifi cantly higher than that of PN23 in all tests,however,for diff erent test cycles,the emission diff erences of PN10 and PN23 are diff erent.Although the emission result of PN10 is signifi cantly higher than that of PN23,the result can still meet the requirements of China VI emission regulations,the existing DPF technology can cope with the transition from PN23 to PN10 under the premise that the regulatory limit is not tightened.

关 键 词：颗粒物数量 细颗粒物 重型柴油机 PEMS 试验 排放 

分 类 号：U46[机械工程—车辆工程]