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Demonstration of High Compression Ratio Combustion Systems for Heavy-Duty Diesel Engine with Improved Efficiency and Lower Emissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 29, 2022 by SAE International in United States
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Advanced diesel combustion systems continue to push the peak cylinder pressure limit of engines upward to allow high-efficiency combustion with high compression ratios (CR). The air-standard Otto and Diesel cycles indicate increased compression ratios lead to higher cycle efficiency. The study presented here describes the development and demonstration of a high-efficiency diesel combustion system. The study used both computational and experimental tools to develop the combustion system fully. Computational fluid dynamics (CFD) simulations were carried out to evaluate combustion with two combustion systems at a compression ratio of 22:1 with a Wave piston design (based on the production Volvo Wave piston). Analysis of combustion performance and emissions were performed to confirm the improvements these piston designs offered relative to the baseline combustion system for the engine. Companion single-cylinder engine (SCE) experiments were performed to validate the simulation results. The combustion profiles showed good agreement between the experimental and computational results. Indicated thermal efficiency was increased by almost one percentage point with the high compression ratio pistons. Further testing on a multi-cylinder engine verified the engine brake thermal efficiency improvement.
- Khanh Cung - Southwest Research Institute
- Daniel Christopher Bitsis - Southwest Research Institute
- Thomas Briggs - Southwest Research Institute
- Jason Miwa - Southwest Research Institute
- Edward Smith - Southwest Research Institute
- Han Zhang - Southwest Research Institute
- Zainal Abidin - Southwest Research Institute
CitationCung, K., Bitsis, D., Briggs, T., Miwa, J. et al., "Demonstration of High Compression Ratio Combustion Systems for Heavy-Duty Diesel Engine with Improved Efficiency and Lower Emissions," SAE Technical Paper 2022-01-0427, 2022, https://doi.org/10.4271/2022-01-0427.
- Eismark , J. , Andersson , M. , Christensen , M. , Karlsson , A. et al. Role of Piston Bowl Shape to Enhance Late-Cycle Soot Oxidation in Low-Swirl Diesel Combustion SAE Int. J. Engines 12 3 2019 233 249 https://doi.org/10.4271/03-12-03-0017
- Cung , K. et al. Gasoline Compression Ignition (GCI) Combustion of Pump-grade Gasoline Fuel under High Compression Ratio Diesel Engine Transportation Engineering 2021 100066
- Moiz , A. , Cung , K. , Briggs , T. , and Bitsis , D. Investigation of Gasoline Compression Ignition in a Heavy-Duty Diesel Engine Using Computational Fluid Dynamics SAE Technical Paper 2021-01-0493 2021 https://doi.org/10.4271/2021-01-0493
- Cung , K. , Bitsis , D. , Miwa , J. , Smith , E. et al. Investigation of Gasoline Compression Ignition (GCI) Combustion in a High Compression-Ratio Heavy-duty Single-Cylinder Diesel Engine SAE Technical Paper 2021-01-0495 2021 https://doi.org/10.4271/2021-01-0495
- Hoag , K.L. et al. A Study Isolating the Effect of Bore-To-Stroke Ratio on Gasoline Engine Combustion Chamber Development SAE International Journal of Engines 9 4 2016 2022 2029
- Richards , K. , Senecal , P. , and Pomraning , E. CONVERGE 2.1. 0 Theory Manual Middleton, WI Convergent Science. Inc. 2013