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| 基于道路实测的4类轻型汽油车排放特征 |
| Emission Characteristics of 4 Types of Light duty Gasoline Vehicles Based on On Road Measurements |
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| DOI： |
| 中文关键词: 机动车尾气 排放特征 车载尾气排放测试系统 比功率 轻型汽油车 |
| 英文关键词: Vehicle exhaust Emission characteristics Portable emission measurement system Vehicle specific power Light duty gasoline vehicles |
| 基金项目:国家自然科学基金资助项目（42207138）；广东省环境科学研究院科技创新基金资助项目（HKYKJ-202204）；能源基金会基金资助项目（G-2105-32853） |
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| 中文摘要: |
| 利用车载尾气排放测试系统（PEMS）研究在不同排放标准下货车、商务车（MPV）、运动型多功能车（SUV）和轿车4种轻型汽油车的污染物排放特征。结果表明，轻型汽油车一氧化碳（CO）、总碳氢化合物（THC）、氮氧化物（NOx）、二氧化碳（CO2）和颗粒物数（PN）的排放因子分别为410 mg/km～5 0974 mg/km、03 mg/km～696 mg/km、98 mg/km～1574 mg/km、1479 g/km～2314 g/km和72×108个/km～42×1013个/km，CO和NOx的排放因子更易因累积行驶里程增加而显著升高。CO2排放量与车速显著相关，MPV、SUV和轿车的CO和THC排放速率与加速度基本保持同步上升。CO、THC、NOx和PN的排放速率和油耗速率均随比功率（VSP）增大而增大，低速时进气道喷射（PFI）车辆的燃油经济性和PN排放控制效果优于缸内直喷（GDI）车辆。建议构建本地化排放清单时细化车型分类，并充分考虑在用车辆的实际排放劣化效应。 |
| 英文摘要: |
| A portable emission measurement system（PEMS） was employed to investigate the emission characteristics of pollutants from four types of light duty gasoline vehicles， including trucks， multi purpose vehicles（MPVs）， sport utility vehicles（SUVs）， and sedans under different emission standards. The results showed that the emission factors of carbon monoxide（CO）， total hydrocarbons（THC）， nitrogen oxides（NOx）， carbon dioxide（CO2）， and particle number（PN） for light duty gasoline vehicles ranged from 410 mg/km to 5 0974 mg/km， 03 mg/km to 696 mg/km， 98 mg/km to 1574 mg/km， 1479 g/km to 2314 g/km， and 72×108 particles/km to 42×1013 particles/km， respectively. The emission factors of CO and NOx were more likely to increase significantly with accumulated mileage. CO2 emissions were significantly correlated with vehicle speed， while the emission rates of CO and THC for 〖GK!87mm〗MPVs， SUVs， and sedans rose roughly in step with acceleration. The emission rates of CO， THC， NOx， and PN， as well as the fuel consumption rates， increased with increasing vehicle specific power（VSP）. At low speeds， port fuel injection（PFI） vehicles outperformed gasoline direct injection〖HK〗（GDI） vehicles in both fuel economy and PN emission control. Vehicle classification should be refined in developing localized emission inventories， and the real world emission deterioration of in use vehicles should be fully considered. |
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