早喷和晚喷对柴油机低温预混合燃烧的影响  

Effect of Early Injection and Late Injection on LTC of Diesel Engine

作　　者：洪建海[1] 缪雪龙[1] 郑金保[1] 张贵阳[2] 徐秀华[1] 王先勇[1] 居钰生[1] 

机构地区：[1]中国一汽无锡油泵油嘴研究所,江苏无锡214063 [2]上海交通大学,上海200240

出　　处：《现代车用动力》2013年第4期9-14,55,共7页Modern Vehicle Power

摘　　要：阐述了柴油机低温预混合燃烧主要评价方法和考察指标,运用试验数据分析了低转速低负荷工况喷油定时对发动机排放、缸内压力、有效热效率、燃烧稳定性、预混合期等低温预混合燃烧参数的影响,综合考虑这些影响因素和收益函数,得到了最优喷油定时。最后,对最优喷油定时工况点进行了三维模拟计算,利用模拟计算结果得到T-φ图对低温预混合燃烧的程度进行了直观的评价分析,为低温预混合燃烧喷油策略优化提供了数据支持。This paper explained evaluation methods and parametersin low temperature premixed combustion. Experimental data were used to analysis the effect of injection timing.on the parameters, such as emission, cylinder pressure, thermal efficiency, combustion stability, premixed duration period, aboutlow temperature premixed combustion at low speed and low load. After these influences and the benefit functionwere weighted, optimalinjection timing was found. Finally, numerical simulation was used to analyselow temperature premixing combustion at optimal injection timing, and T -ψ figures obtained from the results of simulation were used to evaluate intui- tively on low temperature premixed combustion. These results were helpful forthe optimization of injection strategy inlow temperature premixing combustion.

关 键 词：低温燃烧 预混合燃烧 喷油定时 循环变动系数 热效率 

分 类 号：TK423.8[动力工程及工程热物理—动力机械及工程]