LLC循环下重型车N2O，PN10排放研究

刘志伟; 李腾腾; 钟祥麟; 任烁今; 黄鹏程; 孟庆梁

doi:10.3969/j.issn.1001-2222.2024.03.005

车用发动机 ›› 2024, Vol. 0 ›› Issue (3) : 30-35. DOI: 10.3969/j.issn.1001-2222.2024.03.005

栏目

LLC循环下重型车N₂O，PN₁₀排放研究

刘志伟¹，李腾腾^1,2，钟祥麟¹，任烁今¹，黄鹏程¹，孟庆梁¹

作者信息 +

N₂O and PN₁₀Emissions of Heavy-Duty Vehicle under Low Load Cycle

LIU Zhiwei¹,LI Tengteng^1,2,ZHONG Xianglin¹,REN Shuojin¹,HUANG Pengcheng¹,MENG Qingliang¹

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文章历史 +

摘要

面向未来法规需求，基于低负荷循环（low-load cycle,LLC），对重型车不同负载条件下的氧化亚氮（N₂O）、10 nm以上颗粒物数量（PN₁₀）以及23 nm以上颗粒物数量（PN₂₃）的排放特征进行了试验研究，并使用v-VSP分块聚类模型进行了区域排放分析。结果表明：LLC工况下， N₂O排放量随载荷的增大而增加，与排温直接相关；低速区或负VSP区内，N₂O排放与载荷呈正相关关系，但在正VSP &中高速区域，过高的载荷反而降低了N₂O的排放； PN₁₀和PN₂₃排放均随载荷的增大而增加，且载荷越大，10~23 nm粒径粒子占比越高；中高速&VSP绝对值大的区域内， PN₁₀和PN₂₃有较高的浓度，但PN₁₀和PN₂₃的绝对排放量主要存在于VSP为正的区域；随着载荷的增大，低速&高VSP区域有更多比例10~23 nm粒径粒子。

Abstract

For the future legislation requirements, the emission characteristics of nitrous oxide(N₂O), particulate matter quantities above 10 nm(PN₁₀) and above 23 nm(PN₂₃) of heavy-duty vehicle were studied at different loads according to low load cycle(LLC), and regional analysis was conducted using the v-VSP binningreconstruction model. The results show that the total N₂O emissions under LLC increase with the increase of load and are directly related to exhaust temperature. N₂O emissions are positively correlated with load in the area of low speed or negative VSP, but N₂O emissions reduce under the full load in the area of positive VSP and mediumhigh speed. Both PN₁₀ and PN₂₃ increase with the load increase, and the particles with the size of 10-23 nm take a higher proportion with the larger load. PN₁₀ and PN₂₃ have relatively high concentrations of emission in the area of mediumhigh speed and high absolute VSP values, but the absolute emissions of PN₁₀ and PN₂₃ mainly concentrate in the area of positive VSP values. With the increase of load, the particles with the size of 10-23 nm take higher proportion in the area of low-speed and high VSP.

导出引用

刘志伟，李腾腾，钟祥麟，任烁今，黄鹏程，孟庆梁. LLC循环下重型车N₂O，PN₁₀排放研究[J]. 车用发动机. 2024, 0(3): 30-35 https://doi.org/10.3969/j.issn.1001-2222.2024.03.005

LIU Zhiwei,LI Tengteng,ZHONG Xianglin,REN Shuojin,HUANG Pengcheng,MENG Qingliang. N₂O and PN₁₀Emissions of Heavy-Duty Vehicle under Low Load Cycle[J]. Vehicle Engine. 2024, 0(3): 30-35 https://doi.org/10.3969/j.issn.1001-2222.2024.03.005