缸内直喷汽油机高压油泵控制系统的设计  

Design of High Pressure Fuel Pump Control System for GDI Engine

作　　者：刘冠麟[1,2] 苗元元 龚金科[1] LIU Guanlin;MIAO Yuanyuan;GONG Jinke(College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China;Mechanical Engineering Academy,Hunan International Economics University,Changsha 410205,China)

机构地区：[1]湖南大学机械与运载工程学院,湖南长沙410082 [2]湖南涉外经济学院机械工程学院,湖南长沙410205

出　　处：《湖南大学学报（自然科学版）》2018年第4期57-63,共7页Journal of Hunan University:Natural Sciences

基　　金：湖南省科技重大专项项目(2014FJ1013)~~

摘　　要：针对缸内直喷汽油机高压油泵工作噪声较大和高压油轨压力动态响应较慢的问题,通过对高压油泵溢流阀驱动电流的优化和泵油量控制策略的设计,使高压油泵工作噪声降低,动态响应时间缩短,当节气门开度由20%增大至50%、目标轨压由6.5 MPa阶跃至9.3 MPa时的动态响应时间仅为4s,表明该方法可行,对整个发动机燃油喷射控制系统的优化具有参考价值.Aiming at the problems remaining in the gasoline direct injection(GDI)engines such as high pressure fuel pump noise and low dynamic response in high pressure fuel rail,the driving current in the pump spill valve is optimized and a control strategy of pump fuel quantity is designed to reduce the work noise of high pressure oil pump and also to shorten the dynamic response time in high pressure fuel rail.When the throttle opening increases from 20%to 50%and target fuel rail pressure from 6.5 MPa to 9.3 MPa,the dynamic response time is only 4 s.Therefore,it is concluded that the method is feasible,and it provides the reference value for optimization of engine fuel injection control system.

关 键 词：缸内直喷汽油机 高压油泵 溢流阀 控制策略 台架试验 

分 类 号：TK411.8[动力工程及工程热物理—动力机械及工程]