Modeling of diesel particulate filter (DPF)
Typ
Examensarbete för masterexamen
Program
Automotive engineering (MPAUT), MSc
Publicerad
2022
Författare
Obadah, Almasri
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Diesel engines using are still expected, especially for inland and sea transport. Recently,
legislation in the European Union has been tightened to reduce emissions from diesel engines
and increase fuel efficiency. To meet these needs, an exhaust system must be developed. The
diesel particulate filter (DPF) is the part responsible in the exhaust system for purifying most
of the soot particles harmful to humans and the environment.
This project aims to study the effect of pressure drop on soot loading, where the pressure drop
rises with the steadily increasing amount of soot. Therefore, the attempt to influence the
pressure drop helps improve the efficiency of soot filtration inside the DPF. The software used
was Axisuite, a commercial program developed by Exothermia to study the exhaust system of
diesel engines, where the model was created entirely identical in terms of dimensions and the
type of materials with what was used in the experiment.
The engine Volvo HD D13 was used during the experiment to collect data. The experiment
data was collected during custom-made test cycle to understand soot formation and its effect
on pressure drop under different engine working conditions. The main parameters that have
been checked for influence on the pressure drop are wall permeability, diffusion mechanism
correction factor, interception mechanism correction factor, and soot reaction speed inside the
diesel particle filter to better agree with the experimental data. The results from the model show
that the pressure drop is significantly improved with the experimental data and thus its effect
on soot loading. The model also allows comparing sure reduction when using the same
porosity-permeability wall and a different permeability.
Beskrivning
Ämne/nyckelord
Diesel particulate filter, Axisuite, Parameter estimation, Diesel oxidation catalyst.