| 摘要:在一台6缸船用发动机上研究甲醇进气道喷射柴油直喷引燃模式在不同替代率下的燃烧和排放特性。结果表明，在25%~100%负荷双燃料模式均可稳定运行，限制替代率提升的主要因素为爆震和过高的压力升高率。研究工况范围内的最高替代率为60%，发生在75%负荷。随着替代率的提升，燃烧呈现出明显的双峰放热特征，燃烧相位整体前移，但燃烧持续期整体呈延长的趋势，仅在替代率升高到一定程度后有所缩短。 |
| 关键词: 船用发动机 甲醇-柴油双燃料模式 燃烧 排放 |
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| Application of Methanol Port Injection and Diesel Pilot Injection Mode in a Marine Engine |
| MA Yue,LIU Rui,JIANG Yuqi,YI Ran,MENG Yangqian |
| National Key Laboratory of Marine Engine Science and Technology， Shanghai 201108， China;Shanghai Marine Diesel Engine Research Institute， Shanghai 201108， China |
| Abstract:The combustion and emission characteristics of methanol port injection and diesel pilot injection mode were studied on a 6-cylinder marine engine under different substitution rates.The results show that the dual-fuel mode can run stably in the load range of 25% to 100%，and the main factors limiting the increase of substitution rate are knock and high pressure rise rate.The highest substitution rate in this study is 60%，which occurs at 75% load.With the increase of substitution rate，two-peak heat release characteristics gets more and more obvious，the combustion phase moves forward，but the overall combustion duration showed a trend of extension，it decreases only when the substitution rate increases to certain extent. |
| Key words: marine engine methanol-diesel dual fuel mode combustion emission |
