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Development of Spark Plug for Ion Current Misfire Detection System

Journal Article
2012-01-1253
ISSN: 1946-3936, e-ISSN: 1946-3944
Published April 16, 2012 by SAE International in United States
Development of Spark Plug for Ion Current Misfire Detection System
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Citation: Doi, K., Nakamura, Y., Hanashi, K., and Hashizume, K., "Development of Spark Plug for Ion Current Misfire Detection System," SAE Int. J. Engines 5(3):1387-1393, 2012, https://doi.org/10.4271/2012-01-1253.
Language: English

Abstract:

In this paper, the authors introduce the spark plug for misfire detection system by ion current. In order to realize high accuracy misfire detection, the signal of ion current must be larger than that of noise. For maintaining ion signal in all designed lifetime, the configuration and initial condition of spark position are derived by an experiment and consideration about degradation in use. Additionally, the cause of noise is determined by an observation and a theoretical study, and we indicate the method to inhibit noise efficiently. Finally, effect of the methods found by these two approaches is confirmed with an engine, and we propose specifications of spark plug satisfying the condition that realize high accuracy detection by ion current.