柴油机进气门晚关系统关键参数对进气性能的影响研究

摘要/Abstract

摘要：

针对DK4A柴油机电液进气门晚关机构,建立了柴油机的数值模型，分析最大升程限位下进气迟闭角对柴油机进气质量流量的影响，研究了附加升程限位与进气迟闭角对进气状态参数的影响。研究表明，最大附加升程限位对进气质量流量影响很小，相同进气迟闭角度下的进气流量变化率均小于3％，且随着进气迟闭角度的增大，进气流量减小；进气迟闭角增大有利于增长滞燃期，降低压缩终了的压力和温度，而最大附加升程限位对压缩终了温度和压力影响很小，在相同进气迟闭角下的温度和压力的变化率均小于5％。

关键词: 柴油机, 进气门晚关, 迟闭角度, 最大附加升程限位

Abstract:

A numerical model of DK4A diesel engine was established on the basis of its electric hydraulic mechanism.The effects of intake valve closing angle on the intake flow rate of the diesel engine were analyzed under a certain maximum lift limit.The effects of the additional lift limit and intake valve closing angle on the intake state parameter were studied. Results indicate that the maximum additional lift limit has a little effects on the intake flow rate,and the change rate of intake flow rate is less than 3％ in the same late closing angle, and the intake flow reduces with the late closing angle increasing.The increase of late closing angle is benefit for reducing the pressure and temperature at the end of compression.The ignition delay period becomes larger when the late closing angle increases, but the maximum additional lift limit has little effects on TDC temperature and pressure.The change rates of TDC pressure and temperature are less than 5％ in the same closing angle.

Key words: diesel;late intake valve closing(LIVC);late , closing angle;maximum additional lift limit

中图分类号:

TK413.4

潘锁柱, 彭义增, 韩伟强, 韩志强, 田维, 尹胧. 柴油机进气门晚关系统关键参数对进气性能的影响研究[J]. 中国机械工程, 2015, 26(24): 3312-3317.

Pan Suozhu, Peng Yizeng, Han Weiqiang, Han Zhiqiang, Tian Wei, Yin Long. Effects of Key Parameters of Diesel Late Intake Valve System on Intake Performance[J]. China Mechanical Engineering, 2015, 26(24): 3312-3317.

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http://www.cmemo.org.cn/CN/Y2015/V26/I24/3312

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