液压可变气门系统关键参数对气门型线的影响研究  

Effects of the Key Parameters of hydraulic Variable Valve System On the valve profile

作　　者：韩志强[1] 刘智[1] Han Zhiqiang;Liu Zhi(Vehicle Measurement, Control and Safety Key Laboratory of Sichuan Province, School of Automotive and Transportation, Xihua University, Sichuan Chengdu 610039)

机构地区：[1]西华大学交通与汽车工程学院,测控与安全四川省重点实验室,四川成都610039

出　　处：《汽车实用技术》2017年第5期63-66,共4页Automobile Applied Technology

基　　金：教育部春晖计划项目(Z2014059);测流体及动力机械教育部重点实验室开放课题(szjj2016-006);测控与安全四川省重点实验室开发课题(szjj2013-028)

摘　　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规律。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角。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。An Electro-Hydraulic Variable Valve System Was invented on the basis of DK4A diesel engine.A Variable ValveSystem simulation model was established by a numerical model in order to the influence of the key parameters of theElectro-Hydraulic Variable Valve System on valve profile.Results indicate that increasing the oil pressure,the diameter ofinflow 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 oilpressure and increasing the diameter of inflow hole.

关 键 词：柴油机 进气门延迟关闭 数值模拟 延迟关闭角度 

分 类 号：U462.1[机械工程—车辆工程]