| 二甲醚燃料喷射过程的试验研究 |
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| 引用本文： | 张光德,黄震,乔信起,周校平.二甲醚燃料喷射过程的试验研究[J].内燃机学报,2002,20(5):395-398. |
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| 作者姓名： | 张光德 黄震 乔信起 周校平 |
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| 作者单位： | 上海交通大学,动力机械与工程教育部重点实验室,上海,200030 |
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| 基金项目： | 国家杰出青年科学基金资助项目 (50 0 2 561 9) |
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| 摘 要： | 系统研究了二甲醚 (DME)燃料的喷射过程 ,测试了不同工况下的油管泵端压力及嘴端压力、喷油器针阀升程和油管中燃料的音速。试验结果表明 :在供油提前角、转速和负荷相同的情况下 ,燃用二甲醚时油管泵端和嘴端压力的上升和下降速度、压力峰值都比燃用柴油时低 ;油管中 DME的音速远低于柴油 ;随着负荷的下降 ,DME的音速下降 ,且下降的速率远比柴油的大。与柴油相比 ,二甲醚的喷射延迟期和喷射持续期长 ,喷射始点的循环变动较大。
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| 关 键 词： | 二甲醚 喷射过程 音速 |
| 文章编号： | 1000-0909(2002)05-0395-04 |
| 修稿时间： | 2002年1月3日 |
An Investigation on Injection Process of Dimethyl Ether |
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| ZHANG Guang-de,HUANG Zhen,QIAO Xin-qi,ZHOU Xiao-ping.An Investigation on Injection Process of Dimethyl Ether[J].Transactions of Csice,2002,20(5):395-398. |
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| Authors: | ZHANG Guang-de HUANG Zhen QIAO Xin-qi ZHOU Xiao-ping |
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| Abstract: | In this work,the line pressure at fuel pump side and at injector side,nozzle needle lift and sound velocity of dimethyl ether (DME) were measured to evaluate DME injection process.The results show that at the same fuel delivery advance angle,engine speed and load,the line peak pressure and rate of pressure increment and decrement of DME are lower than that of diesel fuel.The sound velocity of DME is much lower than that of diesel fuel.With reduction of engine load,sound velocity of DME decreases.The injection delay of DME is longer than that of Diesel fuel.Moreover,relatively large fluctuation of the injection timing for DME was observed. |
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| Keywords: | Dimethyl ether Injection process Sound velocity |
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