基于发动机ECU电源的抗干扰系统设计  

Anti-interference design of engine ECU power supply system

作　　者：赵海发 李小伟 Zhao Haifa;Li Xiaowei(Department of Electrical Engineering,Jiyuan Vocationaland Technical College, Henan Jiyuan, 459000, China)

机构地区：[1]济源职业技术学院电气工程系,河南济源459000

出　　处：《机械设计与制造工程》2021年第8期41-44,共4页Machine Design and Manufacturing Engineering

摘　　要：对汽车发动机微机控制点火系统、供电系统以及电磁阀、继电器开关等主要干扰源产生的电磁干扰进行了分析,并从辐射干扰和耦合干扰两个方面依据GB/T 21437.2—2008中电源线瞬态抗扰度的要求,对ECU内主微控制器QADC和电源管理芯片L9741的电源系统进行了抗干扰设计。对电源线抗扰度和信号线抗扰度进行了测试实验研究,实验结果满足电磁兼容性能及抗干扰的要求。The electromagnetic interference caused by the microcomputer-controlled ignition system,engine power supply system,electromagnetic valve and relay switch is analyzed.According to the requirement of transient immunity of power line in GB/T 21437.2—2008,the anti-interference design of the ECU NaZhu QADC micro controller and the power system of the power management chip L9741 is carried out from two aspects of radiation interference and coupling interference.The power line immunity and signal line immunity are tested and the results meet the electromagnetic compatibility requirements.

关 键 词：点火系统 电源系统 ECU 抗干扰设计 

分 类 号：U463.6[机械工程—车辆工程]