機車點火系統電磁輻射干擾之模擬與分析

Analysis of Radiated EMI from Ignition Systems of Motor Vehicles

林明星(Ming-Shing Lin) ； 林怡誠(Yi-Chan Lin) ； 林慶祥(Chen-Shang Lin)

《大葉學報》 11卷1期 (2002/06) Pp. 81-89

https://doi.org/10.7119/JDYU.200206.0081

摘要

隨著人類對機車操作性能提昇的要求，機車中電裝或電控裝置愈來愈多，例如防滑煞車系統與電子點火系統，然而若不做好電磁相容的設計，其產生之電磁干擾問題，可能降低系統功能，並且可能危害到人體的生命安全；因此機車與其零阻件之EMC設計與EMI對策已成為機車研發設計之一重要的研究課題。本研究針對機車的主要電磁輻射來源“點火系統”，進行理論模擬與量測分析，有關機車點火系統電磁輻射與電磁干擾對策分析之數學模型，以及量測系統在本文中有詳細的說明。同時在本文中亦針對機車點火系統之電磁干擾對策的效果，包括濾波元件、電阻點火線、屏蔽套管、有阻值火星塞接頭，做理論模擬與量測分析，其結果有助於機車點火系統之電磁相容設計。

關鍵字

點火系統 ； 電磁輻射 ； 電磁相容 ； 電磁干擾對策

並列摘要

Electronically controlled devices such as ABS and ignition systems are increasingly used to enhance the performance of motor vehicles. However, electromagnetic noise from vehicles may degrade the performance of electronic devices and cause a human safety problem if the EMC designs are not appropriately implemented. Therefore, EMC design and EMI fix techniques have become an important task in the design of motor vehicles and their devices. In this study, radiated emissions from the major noise source of a vehicle and its ignition system are analyzed by theoretical simulation and measurement. First, the theoretical models and measurement system are proposed for analyzing the problem. In addition, the effects of EMI fix techniques including filter devices, resistive ignition wires, shielding tubes, and resistive spark plugs used to reduce the radiated emission from an ignition system are investigated. The results of the theoretical simulation and measurement are helpful in the EMC design of ignition systems in motor vehicles.

並列關鍵字

ignition system ； radiated emission ； electromagnetic compatibility ； EMC ； EMI fix techniques