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Investigation of Gasoline Compression Ignition in a Heavy-duty Diesel Engine using Computational Fluid Dynamics
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 06, 2021 by SAE International in United States
Event: SAE WCX Digital Summit
A computational fluid dynamics (CFD) model was developed to explore gasoline compression ignition (GCI) combustion. Results were validated with single-cylinder engine (SCE) experiment. It was shown that CFD model captured experimentally observed combustion performance. Moreover, estimation of energy breakdown and emissions from CFD model were also used to analyze the performance of GCI combustion under current heavy-duty diesel engine platform. The current paper also provide detailed analysis on in-cylinder combustion and emissions using CFD results. This helps identifying future work that can further optimize the combustion system for GCI. For example, it was found that utilization of injection strategy and injector nozzle configuration can deliver desirable fuel stratification profile that benefits both engine and emissions performance. Finally, paper provides comparison between diesel and GCI combustion under the same operating condition as well as using similar engine hardware. Emphasis on these different combustion concepts show that simultaneous optimization of engine and fuel property could really overcome the efficiency and emissions trade-off that conventional diesel combustion performance has been known for.