Effect of fuel supply loop for EUP's cyclic variation characteristics

被引：0

作者：

Qiu T. ^{[1
]}

Yin W. ^{[1
]}

Liu X. ^{[1
]}

Lu Y. ^{[1
]}

Liu Y. ^{[2
]}

机构：

[1] School of Mechanical Engineering, Beijing Institute of Technology

[2] School of Mechanical-electronic and Automobile Engineering, Beijing University of Civil Engineering and Architecture

来源：

Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | 2010年 / 41卷 / 02期

关键词：

Cyclic variation; Diesel; Electronic unit pump; Fuel injection system; Fuel supply pressure;

D O I：

10.3969/j.issn.1000-1298.2010.02.005

中图分类号：

学科分类号：

摘要：

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.

引用

页码：21 / 24

页数：3

共 8 条

[1] Wang F., Coupling simulation on fuel injection system for single-unit electronic-control pump, Chinese Journal of Construction Machinery, 6, 2, pp. 214-216, (2008)
[2] Fan L., Development and performance investigation on a new type electronic control diesel fuel injection system, (2008)
[3] Li S., Yu X., Wang C., Design and experiment of electronic injection system for unit pump on diesel engine, Transactions of the Chinese Society for Agricultural Machinery, 39, 1, pp. 30-32, (2008)
[4] Yang S., Yu S., Wu C., Et al., Development of a calibration system for electronic unit pump with multi-stations, Transactions of the Chinese Society for Agricultural Machinery, 38, 2, pp. 164-167, (2007)
[5] Lu J., Luo Y., Lu S., Et al., The study on cycle variation of a vehicle turbocharged diesel engine, Chinesse Internal Combustion Engine Engineering, 11, 2, pp. 1-7, (1990)
[6] Li Z., Luo F., Huang X., Et al., Analysis of cyclic variation and influencing factors on supercharging and inter-cooling diesel engines, Small Internal Combustion Engine and Motorcycle, 36, 3, pp. 11-14, (2007)
[7] Fan L., Zhu Y., Long W., Et al., Quantitative analysis of cycle fuel injection quantity fluctuation of electronic control assembly pump, Transactions of CSICE, 26, 3, pp. 264-271, (2008)
[8] Tang C., Shen Z., Influence of fuel supply pump flow characteristic on PW2000 fuel injection pump and steyr diesel engine performance, Modern Vehicle Power, 1, pp. 45-47, (2004)

← 1 →