基于WLTC和NEDC循环的轻型车氨排放特性研究

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英文篇名：A Research on Ammonia Emission Characteristics of Light-dutyVehicles Based on WLTC and NEDC Cycles 作者：罗佳鑫 ; 崔健超 ; 谭建伟 ; 杨正军 ; 朱庆功 英文作者：Luo Jiaxin;Cui Jianchao;Tan Jianwei;Yang Zhengjun;Zhu Qinggong;China Automotive Technology and Research Center;FAW Toyota Research & Development Co.,Ltd.;School of Mechanical Engineering,Beijing Institute of Technology; 关键词：氨排放特性 ; WLTC循环 ; NEDC循环 ; 三元催化器 英文关键词：ammonia emission characteristics;;WLTC cycle;;NEDC cycle;;three-way catalytic converter 中文刊名：QCGC 英文刊名：Automotive Engineering 机构：中国汽车技术研究中心;一汽丰田技术开发有限公司;北京理工大学机械与车辆学院; 出版日期：2019-05-25 出版单位：汽车工程 年：2019 期：v.41;No.298 基金：国家自然科学基金(51676017)资助 语种：中文; 页：QCGC201905004 页数：6 CN：05 ISSN：11-2221/U 分类号：17-22

摘要

选择3辆轻型汽油车进行了基于WLTC和NEDC循环下的排放试验,对其常规污染物和氨的排放特性进行了分析。结果表明:氨是发动机原始排气进入三元催化器后发生氧化还原反应的副产物;持续时间较长的加速工况是氨生成的主要工况,此时原排气中较高浓度的CO在三元催化器内提供了较强的还原环境,而导致氨的生成;随着行驶里程的增加,氨排放呈上升趋势;低温环境下更容易产生较高的CO与氨排放。
        Three light-duty gasoline vehicles are selected to conduct the emission tests based on WLTC and NEDC cycles to analyze the emission characteristics of regular pollutants and ammonia. The results show that ammonia is a byproduct of oxidation-reduction reactions, which occur when the initial exhaust of engine enters into three-way catalytic converter(TWC). The main condition for ammonia formation is long-duration acceleration, when relatively high concentration of CO provides a relatively strong reduction environment in TWC, leading to the forming of ammonia. The ammonia emission shows a rising trend as the mileage increases and high CO and ammonia emissions are more likely to occur under low temperature environment.

引文

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