国六缸内直喷轻型汽油车污染物劣化特性  

Emission Deterioration Characteristics of Gaseous Pollutants from China Ⅵ In-Cylinder Direct Injection Light Gasoline Vehicle

作　　者：尹黛霖 杨超[1] 温溢[1] 赵笑春 李贺 YIN Dailin;YANG Chao;WEN Yi;ZHAO Xiaochun;LI He(China Automotive Technology&Research Center Co.,Ltd.,Tianjin,300300,China;Beijing Benz Automotive Co.,Ltd.)

机构地区：[1]中国汽车技术研究中心有限公司,天津300300 [2]北京奔驰汽车有限公司

出　　处：《小型内燃机与车辆技术》2024年第5期63-68,共6页Small Internal Combustion Engine and Vehicle Technique

摘　　要：为了更加准确地了解轻型汽油车的排放劣化特征,选取了6辆缸内直喷轻型汽油车,进行160 000 km里程累积,分析气态污染物CO、THC、NO_(x)的排放随行驶里程的劣化规律。结果表明,CO、THC、NO_(x)三种污染物的平均劣化系数分别为2.1、1.9和1.3,CO、THC、NO_(x)三种污染物的平均劣化修正值分别为121.8、9.4、3.3。自然吸气车辆污染物和里程的线性关系较涡轮增压车辆更加明显,R^(2)都高于0.5;涡轮增压车辆除了THC的线性拟合较好,CO、NO_(x)与里程的线性关系都较差,出现了明显的波动。有利于准确估算轻型汽油车的尾气排放量,进一步加严机动车污染排放限值,促进空气质量改善。In order to more accurately analyze the emission deterioration characteristics of light gasoline vehicles,six direct-injection light gasoline vehicles were selected for 160000 km mileage accumulation to analyze the deterioration of gaseous pollutants CO,THC,and NO_(x) emissions with driving mileage.The results show that the average deterioration coefficients of CO,THC and NO_(x) are 2.1,1.9 and 1.3 respectively,and the average deterioration correction values of CO,THC and NO_(x) are 121.8,9.4 and 3.3 respectively.The linear relationship between pollutants and mileage of normally aspirated vehicles is more obvious than that of turbocharged vehicles,R~2is higher than 0.5;In addition to the good linear fitting of THC,the linear relationship between CO,NO_(x) and mileage of turbocharged vehicles is poor,with obvious fluctuations.This study is conducive to accurately estimate the exhaust emissions of light gasoline vehicles,further tighten the vehicle pollution emission limit,and promote the improvement of air quality.

关 键 词：轻型汽油车 劣化系数 修正值 线性关系 

分 类 号：U467.19[机械工程—车辆工程]