Sensing Technology Using Narrow Band Microwave for PM Accumulation Amount in Diesel Particulate Filter

Abstract

We developed a real-time measurement technique for the amount of PM accumulated on DPF using a narrow-band microwave of 2.4 to 2.5 GHz. We modeled the PM accumulation amount, the temperature values measured inlet and outlet of the DPF and microwave absorption in a transient test using the actual device. When the PM accumulation amount was estimated in the other transient test, it was confirmed that the amount of the PM accumulated on DPF can be estimated with a high accuracy. The output of the model followed the PM amount in real time by the difference of 0.5g/L or less.