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Porous thermal barrier coatings for enhancing the efficiency of internal combustion engines
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-6619-8799
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-4201-668x
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-9578-4076
Scania CV AB, Sodertalje (SWE).
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2022 (English)In: International Journal of Engine Research, ISSN 1468-0874, E-ISSN 2041-3149Article in journal (Refereed) Published
Abstract [en]

Internal combustion engines have a key role in the social and economic advancement of modern society but also a significant contribution to greenhouse gas emissions. For these engines, to preserve their role, a higher efficiency, that dramatically reduces the environmental impact, is necessary. To achieve increased engine efficiency, a technical solution is to lower the heat losses in the combustion chamber. Among them, the heat losses to the pistons are the preferential route, due to their extensive impact on fuel consumption. In this paper, porous thermal barrier coatings with large pores were applied to the pistons of diesel engines to improve engine efficiency. Atmospheric Plasma Spray (APS) process and porosity former TBC feedstock were employed to obtain high porosity coatings with large pores. Scanning Electron Microscopy (SEM) was utilized to investigate the microstructure of the coating in coupons and pistons. The optical properties of the coatings were explored with two methods: the spectral normal hemispherical reflectivity at room temperature (SNHRRT) and spectral normal emissivity at high temperature (SNEHT). The coatings’ behavior under thermal cyclic conditions was assessed by Flame Rig Test. Microstructure analysis was also performed before and after the test to identify the failure mechanisms. The engine efficiency was evaluated by measuring the Indicated Specific Fuel Consumption (ISFC) in a single-cylinder engine test. The results showed that porous coating with large pores combined with a higher emissivity can withstand the engine environment well and have the potential to provide enhancements in engine efficiency.

Place, publisher, year, edition, pages
2022.
Keywords [en]
Engines, environmental impact
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-18318DOI: 10.1177/14680874221093143ISI: 000787321700001Scopus ID: 2-s2.0-85129632322OAI: oai:DiVA.org:hv-18318DiVA, id: diva2:1698499
Available from: 2022-09-23 Created: 2022-09-23 Last updated: 2022-09-26Bibliographically approved

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Uczak de Goes, WellingtonGupta, Mohit KumarMarkocsan, Nicolaie

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