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7331 |
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Wednesday, May 04, 2022, Hall D 2:20 PM Automotive Industry |
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Coatings for increased efficiency in compression ignition engines – updates and coatings beyond thermal barriers |
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John Saputo / Stony Brook University, United States of America Carl Schmidt / Center for Thermal Spray Research, Stony Brook University, United States Sanjay Sampath*/ Stony Brook University, United States Felipe Caliari/ Center for Thermal Spray Research, Stony Brook University, United States Michael Tess/ US Army CCDC-GVSC, United States Eric Gingrich/ US Army CCDC-GVSC, United States |
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The use of thermal barrier coatings (TBCs) in reciprocating engines has been pursued for more than 40 years. While their introduction can be traced to reducing cooling in military vehicles, contemporary research focuses on improving fuel economy, reducing emissions, and enabling alternative fuels. Despite these potential benefits TBCs have seen little implementation due to the lack of consensus taken in the literature regarding their efficacy. Coating developments previously reported from this collaborative study between Stony Brook University and the US Army CCDC-GVSC have revealed little improvement in engine efficiency for a direct comparison of coated and uncoated pistons for a comprehensive collection of coating materials. As an alternative, recent work has focused on the use of coatings to enable various systemic benefits in these systems. The potential to extend the window of viable engine operating conditions and reduce various parasitic losses are discussed with coating development and engine tests results discussed in detail. |