Synergetic DOC-DPF System Optimization Using Advanced Models

Event
Symposium on International Automotive Technology 2017
Authors Abstract
Content
Modern ‘DOC-cDPF’ systems for diesel exhaust are employing Pt-, Pd- as well as Pt/Pd alloy- based coatings to ensure high conversion efficiency of CO, HC even at low temperatures. Depending on the target application, these coatings should be also optimized towards NO2 generation which is involved in low temperature soot oxidation as well as in SCR-based deNOx. Zeolite materials are also frequently used to control cold-start HC emissions. Considering the wide variety of vehicles, engines and emission targets, there is no single optimum coating technology. The main target is therefore to maximize synergies rather than to optimize single components. At the same time, the system designer has nowadays a wide range of technologies to choose from, including PGM alloyed combinations (Pt/Pd), multiple layers and zones applicable to both DOCs and DPFs. This paper attempts to deal with the specific problem of optimizing such complex synergies, using advanced modeling techniques and exploiting a large number of ‘virtual’, rather than ‘real’ experiments. A systematic study of simple (single-PGM, single-layered) coating technologies is the starting point to generate a reaction model database, which is then used to simulate more complex, multi-component, multi-zoned and multi-layered systems.
Meta TagsDetails
DOI
https://doi.org/10.4271/2017-26-0121
Pages
14
Citation
Koltsakis, G., Kandylas, I., and Gulakhe, V., "Synergetic DOC-DPF System Optimization Using Advanced Models," SAE Int. J. Engines 10(1):81-94, 2017, https://doi.org/10.4271/2017-26-0121.
Additional Details
Publisher
Published
Jan 10, 2017
Product Code
2017-26-0121
Content Type
Journal Article
Language
English