面向点火系统电磁兼容预测的火花塞动态电路模型

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摘要点火系统火花塞放电产生的高压脉冲是汽车电磁干扰的主要来源, 为预测点火系统的电磁兼容性, 需建立准确的火花塞模型。首先利用有限元方法提取了火花塞静态寄生电容;然后通过对火花塞在不同工作状态下的放电过程和机理分析, 将火花塞气隙处理成非线性电阻模型;最后建立了包含火花塞静态寄生电容和气隙非线性电阻的火花塞动态电路模型。一次线圈电流、电压及火花塞端电压的仿真与测量结果表明, 本文提出的火花塞动态电路模型是可行的。

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	郑亚利
	俞集辉
	汪泉弟
	贾晋
	刘青松
	李旭

关键词 ：火花塞, 点火系统, 电磁干扰, 有限元方法, 寄生电容, 动态电路模型

Abstract：The high voltage pulse generated by the spark plug discharge in ignition system on an automotive is a main source of EMI. In order to predicate the electromagnetic compatibility (EMC) of the ignition system, the accurate model of the spark plug is needed. This paper extracts the parasitic parameter of the spark plug by finite element method (FEM) approach at first; then through analyzing discharge characteristics and mechanism of the spark plug discharge, the air-gap of the spark plug is treated as non-linear resistance model; finally the dynamic circuit model of the spark plug which includes the static parasitic capacitance and the non-linear resistance is established. The model is verified by measurement and simulation results.

Key words： Spark plug ignition system electromagnetic interference (EMI) finite element method (FEM) parasitic capacitance dynamic circuit model

收稿日期: 2009-08-25 出版日期: 2014-03-07

PACS:	U463.64
	TM151
	TM13

基金资助:国家自然科学基金(50877081)和重庆大学“211工程”三期创新人才培养计划建设(S-09111)资助项目

作者简介: 郑亚利女, 1982年生, 博士研究生, 研究方向为电磁场数值计算、电磁兼容技术。俞集辉男, 1944年生, 教授, 博士生导师, 研究方向为电磁场理论及应用、电磁场数值计算及电磁兼容技术等。

引用本文:

郑亚利, 俞集辉, 汪泉弟, 贾晋, 刘青松, 李旭. 面向点火系统电磁兼容预测的火花塞动态电路模型[J]. 电工技术学报, 2011, 26(2): 8-13. Zheng Yali, Yu Jihui, Wang Quandi, Jia Jin, Liu Qingsong, Li Xu. Dynamic Circuit Model of the Spark Plug for EMCPrediction of Ignition System. Transactions of China Electrotechnical Society, 2011, 26(2): 8-13.

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http://dgjsxb.ces-transaction.com/CN/Y2011/V26/I2/8

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