液压可变气门系统关键参数对气门型线的影响研究.pdf

10.16638/j.cnki.1671-7988.2017.05.021 液压可变气门系统关键参数对气门型线的影响研究 韩志强，刘智 测控与安全四川省重点实验室，西华大学交通与汽车工程学 ，四川 成都 610039 ） 要：基于DK4 柴油机设计了一套电控液压驱动可变气门系统。通过数值模拟建立可变气门系统模型，研究可变 气门系统关键参数对气门型线的影响 律。结果表明，增大可变气门系统的供油压力，增加进油孔直径以及增长供 油持续期均能增加气门的延迟关闭 。同时减小转子截面积，提高供油压力、增大进油孔直径是有效提高气门响应 速度的有效途径。 关键词：柴油机；进气门延迟关闭；数值模拟；延迟关闭角度 中图分类号：U462.1 文献标识码：A 文章编号：1671-7988 (2017)05-63-04 Effects of the Key Parameters of hydraulic Variable Valve System On the valve profile Han Zhiqiang, Liu Zhi Vehicle Measurement, Control and Safety Key Laboratory of Sichuan Province, School of Automotive and Transportation, Xihua University, Sichuan Chengdu 610039 ） Abstract: An Electro—Hydraulic Variable Valve System Was invented on the basis of DK4A diesel engine .A Variable Valve System simulation model was established by a numerical model in order to the influence of the key parameters of the Electro—Hydraulic Variable Valve System on valve profile. Results indicate that increasing the oil pressure ,the diameter of inflow hole and the duration of suppling oil of the variable valve system can all increase the valve closing delay angle. Meanwhile it is an effective approch to improve vavle response through decreasing rotor cross - sectional area,increasing oil pressure and increasing the diameter of inflow hole. Keywords: diesel; late intake vavle closing; numerical model; late closing angle CLC NO.: U462.1 Document Code: A Article ID: 1671-7988 (2017)05-63-04 [2-5] 匹配是该技术的核心 。 前言 国内外学者针对可变气门系统关键结构参数和控制参数