冷热启动状态下WLTC工况的细小颗粒物排放研究  

Study on fine particulate emissions under WLTC working conditions under hot and cold start-up

作　　者：肖克青 张鹏亮 孙城 黄金秋 曾坤 郭恒 XIAO Keqing;ZHANG Pengliang;SUN Cheng;HUANG Jinqiu;ZENG Kun;GUO Heng(CATARC Automotive Test Center(Changzhou)Co.,Ltd.,Changzhou 213000,Jiangsu,China)

机构地区：[1]中汽研汽车检验中心(常州)有限公司,江苏常州213000

出　　处：《农业装备与车辆工程》2025年第2期44-48,共5页Agricultural Equipment & Vehicle Engineering

基　　金：中汽研汽车检验中心(常州)有限公司2023年度重点项目(CZ23P01)。

摘　　要：为探究不同启动状态下的细小颗粒物排放特性,选取一辆轻型汽油车,开展冷、热启动状态的Ⅰ型试验。采用EPC测量原理的AVL(PN10∕PN23)PEMS设备与CPC测量原理的HORIBA CVS(PN23)设备同时采集细小颗粒物。数据分析结果表明,EPC测量原理下的颗粒物数量要高于CPC测量原理下的颗粒物数量;EPC与CPC测量原理的PN23冷、热启动状态的排放因子表现为冷启动大于热启动,而EPC测量原理的PN10冷、热启动状态的排放因子表现为热启动大于冷启动;10~23 nm易生成于低速段的工况下,PN23与PN10的WLTC工况下瞬时排放的变化规律保持一致,随着车速的提升,PN10与PN23的排放差距在不断增大。In order to explore the emission characteristics of fine particulate matter under different starting conditions,a light gasoline vehicle was selected and carried out in the type I test of cold and hot starting states.The AVL(PN10∕23)PEMS device using the EPC measurement principle and the HORIBA CVS(PN23)device using the CPC measurement principle collected fine particulate matter at the same time,and the data analysis results showed that the number of particles under the EPC measurement principle was higher than that under the CPC measurement principle.The emission factors of PN23 in the cold and hot start states of the EPC and CPC measurement principles were greater than those in the hot start,while the emission factors of PN10 in the cold and hot start states of the EPC measurement principle were greater than those in the cold start.10~23 nm was easy to generate in the low-speed section,and the instantaneous emission change law of PN23 and PN10 was consistent under WLTC working conditions,and the emission gap between PN10 and PN23 was increasing with the increase of vehicle speed.

关 键 词：轻型汽油车 冷热启动 细小颗粒物 颗粒物数量 

分 类 号：U464.171[机械工程—车辆工程] TK421.5[交通运输工程—载运工具运用工程]