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。
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%.
作者
刘旻
郭冬冬
曹宏林
陈婷
林赫
湛日景
LIU Min;GUO Dongdong;CAO Honglin;CHEN Ting;LIN He;ZHAN Rijing(Key Laboratory of Power Machinery and Engineering,the Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;Beijing Vehicle Emissions Management Center,Beijing 100176,China)
出处
《车用发动机》
北大核心
2021年第3期45-49,共5页
Vehicle Engine
关键词
汽油机
冷起动
电加热催化剂
金属载体
排放
gasoline engine
cold start
electrically-heated catalyst
metallic substrate
emission
