P4.1 - Microwave-Based Diesel Particulate Filter Monitoring – Soot Load Determination and Influencing Parameters

M. Feulner, A. Müller, G. Hagen, D. Brüggemann & R. Moos
Diesel particulate filters (DPF) are essential for diesel exhaust gas aftertreatment in the automotive sector. For soot load determination, a novel approach using microwaves emerged recently. Based on the electrical conductivity of soot particles, the soot load of the DPF can be measured directly and in a contactless way by this method. Microwaves are impressed into the filter housing and the reflection and transmission is measured. In this study, in-operation dynamometer measurements are presented. Tests...