Real-Time Particulate Filter Soot and Ash Measurements, Optimized Control, and Diagnostics via Radio Frequency Sensing

Alexander  Sappok, Filter Sensing Technologies, Inc.

Real-Time Particulate Filter Soot and Ash Measurements, Optimized Control, and Diagnostics via Radio Frequency Sensing

Radio frequency (RF) techniques provide a direct, non-contact means for monitoring the loading state of particulate filters.  The technique is equally applicable to both diesel particulate filters (DPF) and gasoline particulate filters (GPF).  This presentation compares conventional pressure- and model-based measurement and control systems, which provide only indirect estimates of the filter loading state, with direct measurements of filter loading base on radio frequency resonance techniques.  The presentation covers on-vehicle fleet evaluations, engine dynamometer testing with both light-duty and heavy-duty applications, the use of different filter materials (cordierite and aluminum titanate), and system benchmarking of an RF-based aftertreatment control system relative to the stock controls on a heavy-duty MY 2013 engine platform.  Results demonstrate the direct measurement of soot and ash levels in the particulate filter over the full-useful life, with both new and aged components, as well as fuel efficiency gains and advanced diagnostics enabled through RF sensing and optimized control.

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