수소 대형 엔진에서 고부하 운전과 조기점화 억제를 고려한 공기과잉률 제어 전략
This study suggested strategies of controlling excess air ratio in hydrogen heavy-duty engines for high engine load operation and preignition suppression. Backfire occurred excess air ratios less than 1.9 under high-load conditions. When the hydrogen engine was operated at excess air ratios that sup...
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Published in | 한국분무공학회지 Vol. 29; no. 4; pp. 202 - 208 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | Korean |
Published |
한국분무공학회
31.12.2024
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Subjects | |
Online Access | Get full text |
ISSN | 1226-2277 2288-9051 |
DOI | 10.15435/JILASSKR.2024.29.4.202 |
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Summary: | This study suggested strategies of controlling excess air ratio in hydrogen heavy-duty engines for high engine load operation and preignition suppression. Backfire occurred excess air ratios less than 1.9 under high-load conditions. When the hydrogen engine was operated at excess air ratios that suppressed backfire, preignition occurred. Considering the timing of preignition occurrences and their impacts on engine performance, two type of preignition were determined. While late preignition did not significantly affected engine performance, early preignition with a significantly advanced combustion phasing increased engine load loss. Although it was possible to increase the engine power output by reducing the excess air ratio, the engine operation with an excess air ratio of 2.0 was limited due to the occurrence of preignition and knocking. An excess air ratio of 2.2 was suitable for suppressing the preignition. |
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Bibliography: | Institute for Liquid Atomization and Spray Systems-Korea KISTI1.1003/JNL.JAKO202405657420341 |
ISSN: | 1226-2277 2288-9051 |
DOI: | 10.15435/JILASSKR.2024.29.4.202 |