摘要
在AMESim环境下建立了双阀系统的仿真模型,与试验数据对比证明仿真模型能够准确预测双阀系统的喷油特性。利用仿真模型分析了全工况平面内不同控制模式下柱塞直径、凸轮型线速率、柱塞配合间隙、溢流阀(spill valve.SV)升程、针阀控制阀(needle controlvalve,NCV)升程、针阀升程、喷孔直径和预主喷间隔变化对主喷油量的影响,揭示各特性参数变化所引起的主喷油量波动随转速及主喷脉宽的变化规律。并通过量化分析得到影响主喷油量波动的4个关键特性参数及其对主喷油量波动影响的百分比量化指标。在全工况平面内,SV控制模式下柱塞直径影响所占百分比为25.83%～43.32%,凸轮型线速率为7.21%～21.66%,喷孔直径为15.08%～28.68%,预主喷间隔为8.71%～42.28%;NCV控制模式下柱塞直径影响所占百分比为22.03%～32.11%,凸轮型线速率为6.99%～13.55%,喷孔直径27.55%～37.30%,预主喷间隔为18.60%～28.34%。并且2种控制模式下影响主喷油量波动的各特性参数所占百分比随着转速及脉宽变化表现出复杂的变化规律。
Established a double valve system simulation model in AMESim environment, by comparison with experiment results, it was proved to be able to accurately predict injection characteristics of the double valve system. The influence of parameters such as plunger diameter, velocity of cam profile, plunger clearance, spill valve （SV） lift, needle control valve （NCV） lift, nozzle needle valve lift, spray hole diameter and dwell time between pre and main injections on fuel delivery fluctuation was analyzed in detail using the simulation model for whole operation conditions and different control mode, to reveal the change rule of main injection delivery fluctuation with speed and main injection pulse width resulted from variation of these parameters. Finally, through quantitative analysis, four key characteristic parameters influencing main injection delivery fluctuation and their contribution rate were achieved. In SV control mode, the influence percentageof plunger diameter is from 25.83% to 43.32%, velocity of cam profile from 7.21% to 21.66%, spray hole diameter from 15. 08% to 28. 68%, dwell time from 8. 71% to 42. 28%; In NCV control mode, the influence percentage of plunger diameter is from 22.03% to 32. 11%, velocity of profile from 6. 99% to 13. 55%, spray hole diameter from 27. 55%0 to 37.30%, dwell time from 18.60% to 28. 34%. And with speed and injection pulse width variation the influence percentage of these parameters on main injection delivery fluctuation exhibits complicated state
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2013年第2期74-82,共9页
Chinese Internal Combustion Engine Engineering
基金
国家自然科学基金项目(50909024)
广东省教育部产学研结合项目(2009A090100050)
中央高校基本科研业务费专项资金项目(HEUCF110301)
新世纪优秀人才支持计划资助项目
关键词
内燃机
电控双阀喷油系统
喷油量
量化分析
AMESIM
IC engine
eleetron
controlled double valve fuel injection system
injection delivery
quantitative analysis~ AMESim
