仇滔,尹文辉,刘兴华,陆滢,刘永峰.低压油路对电控单体泵循环变动的影响试验[J].农业机械学报,2010,41(2):21-24.
Qiu Tao,Yin Wenhui,Liu Xinghua,Lu Ying,Liu Yongfeng.Effect of Fuel Supply Loop for EUP’s Cyclic Variation Characteristics[J].Transactions of the Chinese Society for Agricultural Machinery,2010,41(2):21-24.
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低压油路对电控单体泵循环变动的影响试验   [下载全文]
Effect of Fuel Supply Loop for EUP’s Cyclic Variation Characteristics   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  柴油机〓电控单体泵〓燃油喷射系统〓循环变动〓供油压力
基金项目:国防“973”资助项目(97361357);北京市自然科学基金资助项目(3102011)
作者单位
仇滔 北京理工大学 
尹文辉 北京理工大学 
刘兴华 北京理工大学 
陆滢 北京理工大学 
刘永峰 北京建筑工程学院 
中文摘要:进行单缸单体泵的油泵台架试验,获得了不同转速下油泵入口端的低压供油压力和高压油管内的高压压力。分析了循环变动时低压和高压对应的压力曲线特点。研究表明:单体泵控制阀打开过程中,供油柱塞下行吸油使得低压油路内压力降低,同时高压油腔内燃油回流到低压油路时形成压力波,这两个因素导致高转速时低压油路的供油压力在部分循环内出现负压,产生单体泵循环变动。试验证明,提高输油压力和增大低压油路的流通面积能够降低单体泵循环变动。
Qiu Tao  Yin Wenhui  Liu Xinghua  Lu Ying  Liu Yongfeng
Beijing Institute of Technology;Beijing Institute of Technology;Beijing Institute of Technology;Beijing Institute of Technology;Beijing University of Civil Engineering and Architecture
Key Words:Diesel  Electronic unit pump  Fuel injection system  Cyclic variation  Fuel supply pressure
Abstract:By experimental studies for the single EUP on test bench, the low fuel supply pressures near the EUP and the high pressures in high pressure fuel pipe at different cam speeds were acquired. The high and low pressure curves of the EUP’s cyclic variation circles were analyzed. Test results showed that when the cam shaft speed is very high, the supply pressure instantaneous decreased as the plunger move downward, and the pressure wave which results from the backward flow of high pressure fuel appears in low fuel supply loop. The above two factors cause the negative pressure at low fuel supply loop, and leads to the cyclic variation. Increase in fuel supply pressure and the fuel supply pipe line’s flow area is advantageous in reduction the cyclic variation of EUP. 

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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