Development of an Integrated Diesel Exhaust Aftertreatment Simulation Tool with Applications in Aftertreatment System Architecture Design 2007-01-1138
As emissions regulations are becoming increasingly stringent worldwide, multiple exhaust aftertreatment devices are considered in order to minimize diesel engine tailpipe emissions. This paper presents the development of an integrated model of an advanced diesel aftertreatment system that consists of a diesel oxidation catalyst (DOC), a Lean NOx Trap (LNT), a diesel particulate filter (DPF), and connecting exhaust pipes. All component models are incorporated into a unified diesel exhaust aftertreatment simulation tool with uniform I/O in MATLAB/Simulink. The platform and approach to incorporate all component models into a single system model are described.
The developed integrated diesel aftertreatment system model has been employed to simulate tailpipe emissions of a light-duty vehicle over the US Federal Test Procedure (FTP) emission certification cycle. The integrated system model was also utilized in the sensitivity study of the diesel aftertreatment system design parameters, including the size, the PGM loading, the catalyst formulation, and the location of each aftertreatment device. Finally, the integrated system model was applied to evaluate various diesel aftertreatment system architecture design concepts.
The integrated diesel exhaust aftertreatment simulation tool provides the capability to efficiently evaluate various aftertreatment system architecture designs (such as the order and positioning of each aftertreatment device), and optimize design parameters of each aftertreatment device (such as the size and PGM loading) in order to minimize tailpipe emissions and cost.