Study of Pre-chamber Jet Combustion Behavior using a Small Two-stroke Optically Accessible Engine
A small 2-stroke engine can be an effective power source for an electric generator mounted on a series hybrid electric vehicle. In recent years, a technology referred to as pre-chamber jet combustion has attracted attention as a means of enhancing thermal efficiency by improving mixture ignitability. In this study, experiments were conducted to investigate differences in combustion behavior between the application of spark-ignited (SI) combustion and pre-chamber jet combustion to a small, two-stroke engine. The experimental equipment used was a two-stroke, single-cylinder, optically accessible engine with a displacement of 63.3 cm3. Differences between conventional SI combustion and pre-chamber jet combustion were examined by means of in-cylinder pressure analysis, in-cylinder combustion visualization and image processing software. The diameter of the connecting orifice of the pre-chamber was varied between two types. The results revealed that the combustion time and indicated mean effective pressure obtained with pre-chamber jet combustion were more stable compared with conventional combustion. It was also found that a linear jet combustion flow was formed with a smaller connecting orifice diameter and the combustion time was shortened, but combustion was not stable. In addition, it was found that the maximum pressure decreased with a higher jet flow velocity.
- Record URL:
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- DEUSHI, Takato
- NAKA, Takuma
- TSUJIGUCHI, Tatsuya
- Iijima, Akira
- YAMAGUCHI, Shiro
- KUROIWA, Minoru
- Eto, Kuniyoshi
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Conference:
- The 26th Small Powertrains and Energy Systems Technology Conference
- Location: Himeji , Japan
- Date: 2022-10-31 to 2022-11-3
- Publication Date: 2022-1-9
Language
- English
Media Info
- Media Type: Web
- Features: References;
Subject/Index Terms
- TRT Terms: Combustion; Engines; Hybrid vehicles; Spark ignition engines; Two stroke cycle engines; Visualization
- Subject Areas: Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01870503
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 2022-32-0076
- Files: TRIS, SAE
- Created Date: Jan 23 2023 4:23PM