二冲程点燃式直喷重油发动机小负荷试验

魏民祥; 刘锐; 杨海青; 贝太学; 季昊成; 常诚

doi:10.13224/j.cnki.jasp.2017.12.014

二冲程点燃式直喷重油发动机小负荷试验

doi: 10.13224/j.cnki.jasp.2017.12.014

南京航空航天大学能源与动力学院，南京 210016

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出版历程
- 收稿日期: 2016-04-18
- 刊出日期: 2017-12-28

Partial load tests on a twostroke spark ignition direct injection heavy fuel engine

摘要

摘要: 利用燃用轻柴油的二冲程点燃式空气辅助缸内直喷发动机，进行了转速为3000r/min、节气门开度为10%与20%下的小负荷试验，研究了点火及喷油参数对发动机性能的影响。试验结果表明:当节气门开度较小时，采用上止点前30°~40°点火提前角，饱和点火能量，稀混合气（过量空气系数大于1.1）及适度提前混合物喷射结束时刻的策略能够充分改善发动机动力性和经济性。随着负荷增大，点火能量影响程度减小，采用适度推迟点火提前角，偏浓混合气（过量空气系数小于1.0）及提前喷射结束时刻策略，增加燃油蒸发时间来充分发挥发动机动力性能，而采用饱和点火能量，偏稀混合气（过量空气系数大于1.15）能够大幅度改善发动机经济性及HC/CO排放。
- 小负荷 /
- 二冲程 /
- 重油发动机 /
- 火花点火 /
- 空气辅助直接喷射
Abstract: The partial load tests at the engine speed of 3000r/min and 10%,20% throttle open positions were carried out on a twostroke spark ignition dieselfuelled engine with airassisted direct injection, and the effects of ignition and injection parameters on the engine performance were investigated. The tests results indicated that, at the small throttle open position, applying the strategies of the ignition timing at 30°-40° crank angle before top dead center, the saturated ignition energy, the partial lean mixture (excessairratio above 11) and the suitable injection timing can fully improve the engine power output and fuel economy. With the increase of engine load, the effects of the ignition energy reduced. Applying the strategies of the moderate delayed ignition timing, the partial rich mixture (excessairratio below 10) and advancing the end of injection timing to increase the fuel evaporation time resulted in a remarkable engine power output. Furthermore, the fuel economy and HC/CO emissions of the engine improved greatly by the use of the saturated ignition energy and the partial lean mixture (excessairratio above 1.15).
- partial load /
- twostroke /
- heavy fuel engine /
- spark ignition /
- airassisted direct injection

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参考文献(18)

[1]	MORIKAWA K,TAKIMOTO H,KANEKO T,et al.A study of exhaust emission control for direct fuel injection twostroke engine［R］.SAE Technical Paper 1999-01-3287,1999.
[2]	HOUSTON R,BELL G,AHERN S.High specific power output direct injection 2stroke engine applications［R］.SAE Technical Paper 2005-32-0066,2005.
[3]	王春丰,魏民祥.航空活塞发动机燃烧煤油冷起控制研究［J］.航空动力学报,2012,27(7):1619-1624.WANG Chunfeng,WEI Minxiang.Research on cold start fuel flow control of aeropiston engine burning kerosene［J］.Journal of Aerospace Power,2012,27(7):1619-1624.(in Chinese)
[4]	PATRICK J，LAWRENCE W,JULIE E,et al.The feasibility of a kerosene fueled spark ignited twostroke engine［R］.SAE Paper 911846,1991.
[5]	SANCHEZ T F.Experimental study of a kerosene fuelled internal combustion engine［D］.Lausanne,Switzerland:Industrial Energy Systems Laboratory of the Federal Institute of Technology in Lausanne,2008.
[6]	CATHCART G,DICKSON G,AHERN S.The application of airassist direct injection for sparkignited heavy fuel 2stroke and 4stroke engines［R］.SAE Technical Paper 2005-32-0065,2005.
[7]	PADALA S,BANSAL A,RAMESH A.Studies on an air assisted gasoline direct injection system for a twostroke engine［R］.SAE Technical Paper 2008-28-0048,2008.
[8]	GROENEWEGEN J R,LITKE P,WILSON C,et al.The performance and emissions effects of utilizing heavy fuels and biodiesel in a small spark ignition internal combustion engine［C］∥Proceedings of the 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit.Orlando,Florida:American Institute of Aeronautics and Astronautics,2011:5807-5818.
[9]	GROENEWEGEN J R J,SIDHU S S,HOKE J L,et al.The performance and emissions effects of utilizing heavy fuels and algae based biodiesel in a portfuelinjected small spark ignition internal combustion engine［C］∥Proceedings of the 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition.San Diego,California:American Institute of Aeronautics and Astronautics,2011:695-704.
[10]	FALKOWSKI D,ABATA D,CHO P.The performance of a sparkignited stratifiedcharge two stroke engine operating on a kerosene based aviation fuel［R］.SAE Technical Paper 972737,1997.
[11]	陈昌巨,严志勇,周芳.采用电控夹气喷射方法降低内燃机排放研究［J］.华中科技大学学报(自然科学版),2003,31(4):45-47.CHEN Changju,YAN Zhiyong,ZHOU Fang.Reducing pollutant emission by electronic airforced fuel injection system［J］.Journal of Huazhong University of Science and Technology (Natural Science Edition),2003,31(4):45-47.(in Chinese)
[12]	蔡晓林.FAI二冲程缸内直喷汽油机的研究［D］.天津：天津大学，2005.CAI Xiaolin.Study on FAI twostroke DISI engine［D］.Tianjin：Tianjin University，2005.(in Chinese)
[13]	莫胜钧.小型航空点燃式重油活塞发动机点火及火焰传播特性的模拟研究［D］.北京：北京交通大学，2012.MO Shengjun.Study on the ignition and flame propagation property of lightweight spark ignition heavy oil aeroengine［D］.Beijing:Beijing Jiaotong University,2012.(in Chinese)
[14]	莫胜钧.重油预混层流点火特性的仿真分析［J］.内燃机与动力装置,2012,6(3):30-33.MO Shengjun.Simulation analysis on the premixed laminar ignition properties of heavy oil［J］.Internal Combustion Engine and Power Plant,2012,6(3):30-33.(in Chinese)
[15]	石允.小型点燃式二冲程活塞重油发动机混合气形成的模拟研究［D］.北京：北京交通大学，2012.SHI Yun.Study on heavyfuel mixture formation of lightweight sparkignition twostroke engine［D］.Beijing:Beijing Jiaotong University,2012.(in Chinese)
[16]	李长胜.小型高速航空重油活塞发动机混合气形成及燃烧特性的研究［D］.北京：北京交通大学，2014.LI Changsheng.Study on the mixture formation and combustion of lightweight,highspeed,heavy oil aeroengine［D］.Beijing:Beijing Jiaotong University,2014.(in Chinese)
[17]	李苏琪.点燃式重油发动机混合气形成与燃烧过程的研究［D］.北京：北京交通大学,2015.LI Suqi.Study on mixture formation and combustion process of sparkignition,heavy oil engine［D］.Beijing:Beijing Jiaotong University,2015.(in Chinese)
[18]	王永伟,魏民祥,杨海青,等.空气辅助缸内直喷发动机正时控制策略［J］.航空动力学报,2014,29(12):2942-2947.WANG Yongwei,WEI Mingxiang,YANG Haiqing,et al.Timing control strategies of airassisted direct injection engine［J］.Journal of Aerospace Power,2014,29(12):2942-2947.(in Chinese)