RESEARCH PAPER
Equilibrium temperature in diesel particulate filter passive regeneration
1
Motor Transport Institute, Poland
Submission date: 2025-01-27
Final revision date: 2025-03-13
Acceptance date: 2025-04-22
Online publication date: 2025-04-29
Publication date: 2025-04-29
Corresponding author
HIGHLIGHTS
- This paper describes a modified DECSE method for determining the equilibrium temperature of a Diesel Particulate Filter (DPF), incorporating seven engine load steps.
- This study presents an investigation into the catalytic properties of a platinum catalyst within a DOC/OC-DPF system, focusing on the oxidation of nitric oxide (NO) to nitrogen dioxide (NO2) during soot regeneration.
- This work addresses the crucial role of equilibrium temperature in the context of passive DPF regeneration and its impact on fuel consumption reduction.
- This research outlines the experimental methodology, including a seven-phase DECSE test utilizing polynomial approximation of pressure variations for precise determination of the equilibrium temperature.
KEYWORDS
Diesel Particulate Filter (DPF)Equilibrium TemperaturePassive RegenerationNitrogen Dioxide (NO2)DECSE Method
TOPICS
Monitoring and diagnostics for maintenance of technical systemsOperation and maintenance processes for technical items
ABSTRACT
Experimental investigations of a CI engine's DOC/OC-DPF system analyzed soot oxidation by NO2 on platinum catalysts under oxidizing conditions, considering exhaust gas temperature influence. The soot/NO2 equilibrium temperature, crucial for passive filter regeneration and backpressure minimization, was precisely determined using engine dynamometer tests at high NO to NO2 conversion and constant engine speed. Standardized initial conditions (filter loading, pre-test thermal regeneration) ensured result comparability and minimized experimental error. The developed method simplifies DOC/OC-DPF equilibrium temperature determination, providing a tool for comprehensive filter evaluation regarding dimensions, catalytic composition (precious metals/metal oxides ratio), exhaust system placement, and fuel contaminant (e.g., sulfur compounds) impact on catalyst activity. This method facilitates preliminary assessment of regeneration energy consumption and enables potential reduction in costly emission testing (WLTP/RDE), contributing to efficient research and development.
| eISSN: | 2956-3860 |
| ISSN: | 1507-2711 |
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