发明授权
- 专利标题: Process for accelerating the response of an exhaust gas catalyst, and apparatus and electrically heatable carrier bodies for performing the method
- 专利标题(中): 用于加速排气催化剂的反应的方法,以及用于实施该方法的装置和电热载体体
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申请号: US604060申请日: 1990-10-25
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公开(公告)号: US5146743A公开(公告)日: 1992-09-15
- 发明人: Wolfgang Maus , Helmut Swars , Hans-Jurgen Breuer , Theodor Cyron
- 申请人: Wolfgang Maus , Helmut Swars , Hans-Jurgen Breuer , Theodor Cyron
- 申请人地址: DEX Lohmar
- 专利权人: Emitec Gesellschaft fur Emissionstechnologie mbH
- 当前专利权人: Emitec Gesellschaft fur Emissionstechnologie mbH
- 当前专利权人地址: DEX Lohmar
- 优先权: DEX3813928 19880425
- 主分类号: B01D53/86
- IPC分类号: B01D53/86 ; B01J31/00 ; B01J35/02 ; B01J35/04 ; F01N3/20 ; F01N3/28
摘要:
A method of accelerating the response of an exhaust gas catalyst downstream of an internal combustion engine, the exhaust gas catalyst having at least one metal catalyst carrier body coated with ceramic and catalytically active material having a given response temperature, and the carrier body having at least one subzone, the method includes supplying electric power to the metal catalyst carrier body for direct heating at least in subzones thereof, switching on the current for a period of time at least as early as immediately after the onset of engine operation, and dimensioning the current such that at least subzones of the metal carrier body are heated to the given response temperature at least as early as the exhaust gas reaches the given response temperature. The apparatus for performing the above method includes a main catalyst and an electrically heatable precatalyst disposed upstream of the main catalyst as seen in the flow direction of the exhaust gas. The electrically heated precatalyst carrier body comprises layered metal sheets forming a stack with a plurality of channels through which a fluid can flow, the metal sheets having a thickness of substantially 0.03 to 0.06 mm, insulators for electrically subdividing the catalyst carrier body for forming at least one electric current path through the metal sheets, the current path having an electric resistance of substantially between 0.2 and 2.OMEGA..
公开/授权文献
- USPP5803P Cherry rootstock-GM G1/1 cultivar 公开/授权日:1986-11-18
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