发明申请
- 专利标题: METHOD FOR VERIFYING THE AGING CONDITION OF A CATALYTIC CONVERTER ON BOARD A VEHICLE
- 专利标题(中): 汽车车载催化转化器老化条件的方法
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申请号: US12675341申请日: 2008-08-29
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公开(公告)号: US20110056280A1公开(公告)日: 2011-03-10
- 发明人: Martin Votsmeier , Juergen Gieshoff , Thomas Kreuzer
- 申请人: Martin Votsmeier , Juergen Gieshoff , Thomas Kreuzer
- 申请人地址: DE Hanau- Wolfgang
- 专利权人: UMICORE AG & CO.KG
- 当前专利权人: UMICORE AG & CO.KG
- 当前专利权人地址: DE Hanau- Wolfgang
- 优先权: EP07115470.2 20070831
- 国际申请: PCT/EP08/61392 WO 20080829
- 主分类号: G01M15/10
- IPC分类号: G01M15/10
摘要:
The invention describes a method for determining the light-off temperature of a catalytic converter on board a vehicle. The aging condition of the catalytic converter is determined by means of the method. To test the catalytic converter, the latter is loaded for example with a CO/HC test pulse. During the combustion of the additional CO and HC on the catalytic converter, an axial temperature profile is generated. The position of the maximum of said temperature profile along the catalytic converter is dependent on the current light-off temperature. The temperature profile travels through the catalytic converter and can be measured at the outlet of the catalytic converter as a time-dependent profile. The original axial temperature profile can be inferred from the time-dependent profile. Using a calculation program, the current light-off temperature of the catalytic converter on the vehicle can be determined. The method has the advantage that the test can take place at exhaust-gas temperatures considerably higher than the light-off temperature. In this way, it is ensured that the test pulse does not lead to increased pollutant emissions.