发动机ECU电源系统的电磁兼容设计  

Design of Electromagnetic Compatibility for Power System in Engine ECU

作　　者：许冀阳[1] 文昊 XU Jiyang;WEN Hao(School of Automotive Engineering,Shanxi Polytechnic Institute,Xianyan,Shanxi 712000,China;Shanxi Academy of Metrology,Xi'an,Shanxi 710065,China)

机构地区：[1]陕西工业职业技术学院汽车工程学院,陕西咸阳712000 [2]陕西省计量科学研究院,陕西西安710065

出　　处：《微型电脑应用》2020年第4期47-49,共3页Microcomputer Applications

基　　金：陕西工业职业技术学院院级科研计划项目(ZK18-20)。

摘　　要：汽车电子化、智能化程度不断提高,汽车电磁兼容已成为重要研究课题。发动机ECU电源系统的抗干扰设计对发动机正常稳定工作起着重要作用。本文通过对汽车内部微机控制点火系统、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,依据国家标准GB/T 21437.2-2008的电源线瞬态抗扰度要求,对ECU内主微控制器QADC部分和电源管理芯片L9741的电源系统进行了抗干扰设计,最后进行了电源线抗扰度测试实验研究。The level of automotive electronics and intelligence continues to increase, and automotive electromagnetic compatibility has become an important research topic. The anti-interference design of the engine ECU’s power system plays an important role in the normal and stable operation of the engine. This article analyzed the electromagnetic interference generated by the main interference sources such as the computer-controlled ignition system, solenoid valves and relay switches. According to the transient immunity requirements of the national standard GB/T 21437.2-2008 for power lines, in terms of radiated interference and coupled interference, the anti-interference design of the QADC part of the main microcontroller and the power supply system of the power management chip L9741 in the ECU were implemented,Finally, an experimental study on power line immunity test was conducted.

关 键 词：电磁兼容 电源系统 ECU 抗干扰设计 

分 类 号：TG409[金属学及工艺—焊接]