魏民祥

个人信息Personal Information

教授 博士生导师

招生学科专业:
机械工程 -- 【招收博士、硕士研究生】 -- 能源与动力学院
动力工程及工程热物理 -- 【招收博士、硕士研究生】 -- 能源与动力学院
机械 -- 【招收博士、硕士研究生】 -- 能源与动力学院
能源动力 -- 【招收博士、硕士研究生】 -- 能源与动力学院

性别:男

毕业院校:西安交通大学

学历:西安交通大学

学位:工学博士学位

所在单位:能源与动力学院

办公地点:A10-522

联系方式:wmxnuaa@126.com

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Cold start control strategy of a two-stroke direct injection spark-ignited kerosene engine

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所属单位:能源与动力学院

发表刊物:Hangkong Dongli Xuebao

摘要:The cold start control strategy was designed for a two-stroke spark-ignited kerosene engine with air-assisted direct injection. With the use of self-developed electronic control unit, bench tests were carried out to verify the accuracy of the control strategy under 4℃ ambient temperature, and the effects of the key control parameters on cold start performance were researched under about 14℃ ambient temperature. The experimental results showed that, the ignition advance angle had effects on late stage of starting process; after the successful starting, ignition advance angle with 40° before top dead center was most beneficial to accelerate the warm-up process. When applying the saturated ignition energy strategy, the cold start performance was the best, the average engine speed of warm-up process raised to the maximum level, and the related engine speed fluctuation reached to the minimum value. The fuel enrichment factor bigger than 2.5 improved the dynamic performance of starting process, whose speed raising rate was increased, but the variations of cold start process were almost consistent when continuing to increase the fuel enrichment factor from 2.5 to 4.5. The air injection timing angle from 40° to 60° before top dead center was helpful to successful cold start; moderately advancing air injection timing angle at warm-up condition can accelerate the warm-up process. The fuel to air injection delay had direct influence on the fuel air mixture process, which may affect the motor dragging and starting process, and rapidly realize the best successful cold start when the fuel to air injection delay was about 6ms. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.

ISSN号:1000-8055

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发表时间:2017-01-01

合写作者:Liu, Rui,杨海青,Wang, Yong-Wei,Bei, Tai-Xue

通讯作者:Liu, Rui,魏民祥