A study on efficiency and emission enhancements in a 4-stroke natural gas lean burn engine
- Korea Advanced Inst. of Science and Technology, Seoul (Korea, Republic of)
Experiments were performed with a 4-stroke, natural gas fueled SI engine to investigate the effects of several parameters on engine performance under lean operating condition. A favorable effect of charge swirl on stable lean burn operation was observed at a conventional compression ratio. There was an optimum EGR rate which gave a substantial reduction in NOx emissions with minor penalties in efficiency and UHC emissions. Marginal improvement was noticed with lean operations in a long spark duration ignition system. The flame jet ignition system displayed noticeable capability in extending the lean limit. In addition, shadowgraph visualization tests were performed for combustion diagnostic purposes.
- OSTI ID:
- 287740
- Report Number(s):
- CONF-960204--; ISBN 1-56091-790-3
- Country of Publication:
- United States
- Language:
- English
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