Investigation of the Effect of Pre-Chamber Specifications on Pre-Chamber Jet Combustion Characteristics Using an Optically Accessible Engine

2023-01-1801

10/24/2023

Features
Event
Small Powertrains and Energy Systems Technology Conference
Authors Abstract
Content
This study focused on a lean-burn regime using a pre-chamber for improving the efficiency of internal combustion engines. Combustion images were visualized using a two-stroke, single-cylinder, optically accessible engine fitted with a cylindrical pre-chamber. The L/D ratio of the pre-chamber length (L) to its diameter (D) and the diameter of the pre-chamber orifice were varied as parameters. Combustion characteristics were analyzed based on the visualized jet flow configuration and combustion chamber pressure measurements. The results revealed that the combustion duration tended to be longer with a smaller L/D ratio and that the coefficient of variation (COV) of the indicated mean effective pressure (IMEP) was smaller and more stable. With a smaller orifice diameter, the jet velocity was faster, and the flame development duration was shorter, but the combustion duration was longer; IMEP tended to be lower, but the COV of IMEP was smaller.
Meta TagsDetails
DOI
https://doi.org/10.4271/2023-01-1801
Pages
8
Citation
Chiba, T., UGAJIN, T., Shinozaki, K., Tahara, R. et al., "Investigation of the Effect of Pre-Chamber Specifications on Pre-Chamber Jet Combustion Characteristics Using an Optically Accessible Engine," SAE Technical Paper 2023-01-1801, 2023, https://doi.org/10.4271/2023-01-1801.
Additional Details
Publisher
Published
Oct 24, 2023
Product Code
2023-01-1801
Content Type
Technical Paper
Language
English