电加热金属载体催化剂对汽油机冷起动阶段排放性能的影响

刘旻; 郭冬冬; 曹宏林; 陈婷; 林赫; 湛日景

doi:10.3969/j.issn.1001-2222.2021.03.008

车用发动机 >

2021 , Vol. 0 >Issue 3: 45 - 49

DOI: https://doi.org/10.3969/j.issn.1001-2222.2021.03.008

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电加热金属载体催化剂对汽油机冷起动阶段排放性能的影响

刘旻 ,
郭冬冬 ,
曹宏林 ,
陈婷 ,
林赫 ,
湛日景

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（1.上海交通大学动力机械及工程教育部重点实验室，上海 200240；2.北京市机动车排放管理中心，北京 100176）

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Influence of ElectricallyHeated Metallic Substrate Catalyst on Emission Performance of Gasoline Engine during Cold Start

LIU Min ,
GUO Dongdong ,
CAO Honglin ,
CHEN Ting ,
LIN He ,
ZHAN Rijing

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(1.Key Laboratory of Power Machinery and Engineering,the Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;2.Beijing Vehicle Emissions Management Center，Beijing 100176，China)

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摘要

采用电加热金属载体催化剂（EHC），研究了加热电压、加热时间以及贵金属涂敷量对汽油发动机冷起动排放性能的影响。试验结果表明：EHC载体热容小，升温快，THC、CO和NO_x的转化效率比陶瓷载体高；加热电压越大，EHC加热功率越大，直接影响THC、CO和NO_x的转化效率；EHC加热一定时长后，继续增加加热时间，不一定能达到减排效果；通过EHC的应用，能够减少三元催化器50%的贵金属用量。

关键词： 汽油机; 冷起动; 电加热催化剂; 金属载体; 排放

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刘旻 , 郭冬冬 , 曹宏林 , 陈婷 , 林赫 , 湛日景 . 电加热金属载体催化剂对汽油机冷起动阶段排放性能的影响[J]. 车用发动机, 2021 , 0(3) : 45 -49 . DOI: 10.3969/j.issn.1001-2222.2021.03.008

Abstract

Electricallyheated catalyst (EHC) of metallic substrate was used to study the influence of heating voltage, heating time and noble metal coating on emission performance of gasoline engine during the cold start. The test results showed that EHC substrate had a small heat capacity and a fast temperature rise, and the conversion efficiency of THC, CO and NO_x was higher than that of ceramic substrate. The higher heating power of EHC led by the higher heating voltage, and directly affected the conversion efficiency of THC, CO and NO_x. If the heating time of EHC was enough, continuing to heat would not probably achieve more emission reduction. Accordingly, the application of EHC was able to reduce the noble metal of catalytic converter by 50%.

Key words： gasoline engine; cold start; electricallyheated catalyst; metallic substrate; emission

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