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

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

doi:10.3969/j.issn.1001-2222.2021.03.008

Vehicle Engine ›› 2021, Vol. 0 ›› Issue (3) : 45-49. DOI: 10.3969/j.issn.1001-2222.2021.03.008

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

LIU Min¹，GUO Dongdong²，CAO Honglin²，CHEN Ting¹，LIN He¹，ZHAN Rijing¹

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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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LIU Min，GUO Dongdong，CAO Honglin，CHEN Ting，LIN He，ZHAN Rijing. Influence of ElectricallyHeated Metallic Substrate Catalyst on Emission Performance of Gasoline Engine during Cold Start[J]. Vehicle Engine. 2021, 0(3): 45-49 https://doi.org/10.3969/j.issn.1001-2222.2021.03.008