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Loading and Regeneration Analysis of a Diesel Particulate Filter with a Radio Frequency-Based Sensor
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 25, 2010 by SAE International in United States
Annotation ability available
Accurate knowledge of diesel particulate filter (DPF) particulate matter (PM) loading is critical for robust and efficient operation of the combined engine-exhaust aftertreatment system. Furthermore, upcoming on-board diagnostics regulations require on-board technologies to evaluate the status of the DPF. This work describes the application of radio frequency (RF) - based sensing techniques to accurately measure DPF particulate matter levels. A 1.9L GM turbo diesel engine and a DPF with an RF-sensor were studied. Direct comparisons between the RF measurement and conventional pressure-based methods were made. Further analysis of the particulate matter loading rates was obtained with a mass-based total PM emission measurement instrument (TEOM) and DPF gravimetric measurements.
Comparison with pressure drop measurements show the RF technique is unaffected by exhaust flow variations and exhibits a high degree of sensitivity to DPF particulate matter loading and good dynamic response over transient operating conditions. Additional computational work further illustrates the potential for spatially-resolved RF measurements. Based on the experimental results, the RF technique shows significant promise for improving DPF control enabling optimization of the combined engine-aftertreatment system for improved fuel economy and extended DPF service life.
CitationSappok, A., Bromberg, L., Parks, J., and Prikhodko, V., "Loading and Regeneration Analysis of a Diesel Particulate Filter with a Radio Frequency-Based Sensor," SAE Technical Paper 2010-01-2126, 2010, https://doi.org/10.4271/2010-01-2126.
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