专利名称：METHOD FOR VERIFYING THE AGING
CONDITION OF A CATALYTIC CONVERTERON BOARD A VEHICLE
发明人：Martin Votsmeier,Juergen Gieshoff,Thomas
Kreuzer
申请号：US12675341申请日：20080829
公开号：US20110056280A1公开日：20110310
专利附图：
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 isdetermined by means of the method. To test the catalytic converter, the latter is loadedfor example with a CO/HC test pulse. During the combustion of the additional CO and HCon the catalytic converter, an axial temperature profile is generated. The position of themaximum of said temperature profile along the catalytic converter is dependent on thecurrent light-off temperature. The temperature profile travels through the catalyticconverter 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 thecatalytic converter on the vehicle can be determined. The method has the advantage thatthe 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 increasedpollutant emissions.
申请人：Martin Votsmeier,Juergen Gieshoff,Thomas Kreuzer
地址：Lueztelsachsen DE,Gelnhausen DE,Karben DE
国籍：DE,DE,DE
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容