Modeling of Diesel Particulate Regeneration for Transient Driving Schedules

Particulate matter emissions from diesel vehicles are regulated by state and federal governments. Despite engine improvements, aftertreatment remains necessary to meet the emissions criteria. This necessitates the development of a real time control system for diesel particulate trap (DPF) regeneration. As a step towards this goal, we compare two DPF models: a full one-dimensional transient model of gas and solid temperatures and deposit thickness and an averaged model that solves for the cross-sectional average temperature to predict the regeneration location in the DPF. In this work, we apply the models to transient driving conditions that lead to variable engine-out temperature, flowrate, and emissions concentration and compare their performance.