Development of a Catalyzed Diesel Particulate Filter Multi-zone Model for Simulation of Axial and Radial Substrate Temperature and Particulate Matter Distribution

• Published in: Emission control science and technology (Online) Vol. 1; no. 2; pp. 183 - 202
• Main Authors: Mahadevan, Boopathi S., Johnson, John H., Shahbakhti, Mahdi
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-05-2015; Springer Nature B.V
• Subjects: Boundary layers; Computer simulation; Earth and Environmental Science; Earth Sciences; Electronic control; Emission standards; Environmental Science and Engineering; Fluid filters; Heat transfer; Heat transfer coefficients; Industrial Chemistry/Chemical Engineering; Inlet temperature; Multizone models; Nitrogen dioxide; Oxidation; Particulate emissions; Particulate matter; Reaction kinetics; Regeneration; Stress concentration; Substrates; Subsystems; Surfaces and Interfaces; Temperature distribution; Thin Films; Diesel particulate filter model; Diesel exhaust emission control; Temperature distribution; Particulate loading distribution; ECU based particulate filter model
• ISSN: 2199-3629; 2199-3637
• DOI: 10.1007/s40825-015-0015-x

The catalyzed particulate filter (CPF) is an important exhaust aftertreatment subsystem that is managed by the electronic control unit (ECU) of an engine. CPFs need periodic regeneration to avoid temperature exotherms and excess engine back pressure. To this end, a multi-zone particulate filter (MPF) model was developed in this research to serve as a simulation tool to provide on-board diagnostics (OBD) data for managing CPF active regeneration (AR). The MPF model runs in real time within the ECU to provide feedback on temperature and particulate matter (PM) loading distribution within each axial and radial zone of the filter substrate. The MPF model accounts for the internal and external heat transfer mechanisms, inlet temperature distribution using the fully developed boundary layer concept, and PM oxidation by thermal (O
2
)- and NO
2
-assisted oxidation mechanisms. A calibration procedure was developed to calibrate the PM kinetics and heat transfer coefficients of the MPF model. The model shows the good capability to predict temperature and PM loading distribution within the filter.