Numerical Prediction of Fluid Flow and Diesel Combustion in a Pre-chamber and Main Chamber

Document Type

Conference Proceeding

Publication Date


Publication Title

Internal Combustion Engine Division Fall Technical Conference

Conference Name

ASME 2005 Internal Combustion Engine Division Fall Technical Conference


In this study computational fluid dynamics (CFD) was used to model fluid flow and diesel combustion in an IC engine that uses a pre-chamber and a main-chamber. The pre-chamber is located in the cylinder head and a bowl in the piston serves as the main chamber. The study considers the effect of diesel combustion in the pre-chamber on turbulence generation and hence fuel-air mixing and combustion in the piston-bowl. Diesel fuel was injected directly into the pre-chamber and the piston bowl at different times. In order to better determine the effect of pre-chamber combustion on the main chamber combustion, various pre-chamber injection timings were considered. The results show that pre-chamber combustion caused the average cylinder pressure to increase by up to 20% in some cases.



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© 2005 by ASME