Abstract
Keywords:
soot mass limit, catalyzed DPF, cordierite, physical modeling, DoE
Abstract:
The next generation of diesel particulate filters (DPF) will be optimized with respect to system costs and packaging without decreasing their reliability; promising measures are the usage of alternative substrates and integration of catalysts to the DPF. Its thermal stability will be determined by the maximum soot mass loading. The presented work describes a methodology to assess the maximum soot mass limit by advanced modeling and regeneration control. The methodology comprises the accelerated calibration of a regeneration peak temperature limitation by applying Design of Experiments, its integration into the ECU software and the physical modeling of the DPF. The physical model was experimentally validated and the results showed very good agreement. The combination of the DoE polynomial model and the validated physical DPF model allow the calculation and optimization of the critical soot mass limit for selected boundary conditions on-desk.