Spark plug as an ionization sensor in engine knock detection

被引：0
|
作者：
Wu, Xiaomin [1 ]
Li, Fuming [1 ]
Jiang, Deming [1 ]
Wang, Ziyan [1 ]
机构：
[1] Xi'an Jiaotong Univ, Xi'an, China
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2000年 / 34卷 / 09期
关键词：
Combustion knock - Ionization - Sensors - Transducers;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A method is presented for monitoring knock in automobile engine. It uses a spark plug as an ionization sensor. By applying bias voltage across the spark plug, an ionic current takes place. Engine knock is detected when the ionic current prevails with different frequencies. Experiments are done on a four-cylinder type DA462-A. Test results show that engine with knock or without knock produces high frequency ionic signals or smooth signals respectively. The fast Fourier transform is used to analyzed the data. The characteristic frequency domain (10-11 kHz) of engine knock is obtained. The use of spark plug as an ionization sensor is an efficient and convenient method for the knock measurement of SI engine.
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页码：25 / 27
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