车用发动机机油泵变排量控制方法的试验-《内燃机学报》

文章信息/Info

Title:: Experiment of Variable Displacement Control of Oil Pump in Vehicle Engines

作者:: 刘忠民; 步晨嘉; 陆文舒; 程梁柱; 陈庆华; 1. 杭州电子科技大学机械工程学院，浙江杭州 310018；2. 东风汽车集团有限公司，湖北武汉 430056；3. 浙江三田滤清器有限公司，浙江丽水 323700

Author(s):: Liu Zhongmin; Bu Chenjia; Lu Wenshu; Cheng Liangzhu; Chen Qinghua; 1. School of Mechanical Engineering，Hangzhou Dianzi University，Hangzhou 310018，China；2. Dongfeng Motor Corporation，Wuhan 430056，China；3. Zhejiang Santian Filter Limited Company，Lishui 323700，China

Keywords:: vehicle engine; oil pump; variable displacement control; lubrication flow

摘要:: 针对车用发动机润滑系统与机油泵动态匹配问题，在瞬态工况下建立硬件在环(HIL)的发动机与机油泵匹配试验系统．根据新欧洲驾驶循环(NEDC)工况，提出车用发动机润滑系统瞬态加减速循环，研究3种机油泵变排量控制方法对发动机润滑系统动态匹配状态和驱动能量消耗的影响．结果表明：在润滑油温度为100℃、角加速度为40rad/s2条件下，机油泵采用定排量控制方法，泄压阀开启造成的液压功率损失是影响瞬态工况总效率的关键因素；与定排量相比，机油泵采用一阶与二阶变排量控制方法能分别降低机械驱动功30.8%和40.0%；车用发动机机油泵采用变排量控制方法降低机械驱动功率，在瞬态加减速过程中会形成润滑油流量和压力安全裕量低谷．

Abstract:: A hardware in loop(HIL) test system of a vehicle engine was built to study the matching states between the oil pump and the engine under transient operating conditions. A set of accelerating and decelerating cycles for lubrication system of vehicle engine were brought forward according to the new European driving cycle(NEDC)，and then three kinds of displacement control methods of oil pump were analyzed with lubrication safety margin and considering of transient driving power. The result shows that the hydraulic power loss caused by relief valve opening is the main factor of low efficiency of the oil pump under lubricating oil temperature of 100℃ and angular acceleration of 40rad/s2 with constant volume control. The accumulated driving energies by 1-stage and 2-stage variable control are 30.8% and 40.0% lower than the constant volume control，respectively. There are low periods of lubrication flow and pressure safe margins in accelerating and decelerating cycles，resulting in engine insufficient lubrication in transient driving conditions.