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1D model of a three-way catalyst in MATLAB/Simulink for assessing pollutant reduction in the NEDC emission test
1
Instytut Techniki, Akademia Nauk Stosowanych, Poland
2
Aftremarket Emission Control Engineering, DRiV Poland Sp. z o.o. (Tenneco division), Poland
Submission date: 2025-11-30
Final revision date: 2026-02-08
Acceptance date: 2026-02-14
Online publication date: 2026-02-20
Corresponding author
Damian Kurzydym
Instytut Techniki, Akademia Nauk Stosowanych, Akademicka 1, 47-400, Racibórz, Poland
Instytut Techniki, Akademia Nauk Stosowanych, Akademicka 1, 47-400, Racibórz, Poland
KEYWORDS
TOPICS
ABSTRACT
A one-dimensional model of a three-way catalyst (TWC) was developed in MATLAB/Simulink, consisting of a monolith pressure-drop module and a reaction block for CO/HC/NOx. The model was validated against a reference GT-SUITE solution, with agreement in levels and trends. Kinetic parameters were tuned and verified using emission tests in the NEDC cycle. The model reproduces pressure drop, instantaneous profiles, and cumulative emissions upstream and downstream of the catalyst. Satisfactory agreement between predicted reductions and NEDC measurements confirms the model’s suitability for assessing TWC effectiveness and for calibration under test conditions. The approach is computationally lightweight and ready to be extended to other driving cycles, additional physical effects, and exhaust aftertreatment systems such as a GPF.
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