江苏大学学报（自然科学版）2017，Vol.38Issue(4)：396-402,7.DOI:10.3969/j.issn.1671-7775.2017.04.005
附加升程曲线对柴油机进气状态的影响
Effects of additional lift curve on intake state of diesel engine with variable valve
摘要
Abstract
Based on the independently developed variable valve system of DK4A diesel engine,the effects of additional valve lift,duration of additional valve lift and intervals between additional valve lift peak and original valve lift peak on intake air state parameters were investigated by simulation and experiment.The results show that there is critical value of intervals between additional valve lift peak and original valve lift peak.If the interval is less than the critical value,the interval has no effect on incylinder air state parameters of engine.When the interval is larger than the critical value,the closing timing of intake valve is retarded with the increasing of interval,and the intake manifold air flow,the incylinder temperature and the in-cylinder pressure at the top dead center are decreased.Under the condition that the additional valve lift does not influence the closing timing,the change rate of in-cylinder air state parameters is increased with the increasing of additional valve lift.Under the condition that the additional valve lift has effect on the closing timing,the intake valve closing timing is retarded,and the intake air flow,the temperature and pressure at top dead center are decreased with the increasing of additional valve lift duration.关键词
柴油机/可变气门系统/附加升程/进气状态参数/数值模拟Key words
diesel engine/variable valve lift system/additional lift/intake air state parameters/numerical simulation分类
能源科技引用本文复制引用
田维,何文潇,韩志强,韩伟强,郭明强,夏琦..附加升程曲线对柴油机进气状态的影响[J].江苏大学学报（自然科学版）,2017,38(4):396-402,7.基金项目
国家自然科学基金资助项目(51406137) （51406137）
教育部春晖计划项目(Z2014059) （Z2014059）
教育部重点实验室开放课题项目(szjj2016006) （szjj2016006）
