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Aftertreatment device NOx conversion efficiency diagnostics using on board adaptive diagnostic algorithm
Aftertreatment device NOx conversion efficiency diagnostics using on board adaptive diagnostic algorithm
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机译:使用机载自适应诊断算法进行后处理装置NOx转化效率诊断
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摘要
A powertrain includes an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to convert NOx. A method for indicating a malfunctioning catalyst includes monitoring an actual NOx content exiting the aftertreatment system, monitoring factors affecting conversion efficiency of the aftertreatment device, determining a predicted threshold NOx content exiting the aftertreatment system for an exemplary malfunctioning catalyst based upon the factors affecting conversion efficiency, comparing the actual NOx content exiting the aftertreatment system to the predicted threshold NOx content exiting the aftertreatment system, and indicating a malfunctioning catalyst based upon the comparing.
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