摘要
内燃机供油系统主要包括高压油泵、高压油管、高压喷嘴,三者协调工作有助于燃机工作效率的稳定。为了实现对高压油管压力精确控制,本文从燃油流动的油量守恒和燃油物态特性方程出发,利用流体力学对高压油管的压力变化进行数学建模,确定油管压力变化规律。通过对模型求解,针对稳定压强下的单向阀,得到其开启时长为0.28 ms。同时,针对凸轮运动模型,确定其角速度为25 rad/s。
The oil supply system of internal combustion engine mainly includes high-pressure oilpump,high-pressure oil pipe and high-pressure nozzle.The coordinated work of the three is conducive to the stability of the working efficiency of the engine.In order to realize the accurate control of the pressure of the oil pipe,this paper starts from the oil quantity conservation and the oil state property equation,uses fluid mechanics to conduct mathematical modeling of the pressure change of the oil pipe,and determines the pressure change rules.By solving the model,the opening time of the one-way valve under stable pressure is determined to be 0.28ms,and the angular velocity of the cam motion model is determined to be 25rad/s.
作者
王一
张康新
王阳
陈姿彤
石立强
WANG Yi;ZHANG Kangxin;WANG Yang;CHEN Zitong;SHI Liqiang
出处
《现代机械》
2021年第6期48-52,共5页
Modern Machinery
基金
国家自然科学基金(61564002)
教育部半导体功率器件可靠性研究中心开放项目(ERCMEKFJJ2019-(08))。
关键词
高压油泵
压力控制
数学建模
物态特性方程
high-pressure oilpump
pressure control
mathematical modeling
state property equation
