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Closed-loop individual cylinder air-fuel ratio control via UEGO signal spectral analysis

机译:通过UEGO信号频谱分析进行闭环单缸空燃比控制

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The paper presents the development and real time application of an original closed-loop individual cylinder AFR control system, based on a spectral analysis of the lambda sensor signal. The observation that any type of AFR disparity between the various cylinders is reflected in a specific harmonic content of the AFR signal spectrum, represents the starting point of the project. The results observed on a 4 cylinder Spark Ignition engine are encouraging, since in the investigated engine operating conditions the controller is able to reduce AFR inequality below 0.01 lambda. The paper also shows how the proposed controller can be applied to other engine configurations.
机译:本文基于λ传感器信号的频谱分析,介绍了原始的闭环独立气缸AFR控制系统的开发和实时应用。在AFR信号频谱的特定谐波含量中反映出各个气缸之间的任何类型的AFR差异的观察结果,代表了该项目的起点。在4缸火花点火发动机上观察到的结果令人鼓舞,因为在研究的发动机工况下,控制器能够将AFR不等式降低至0.01λ以下。本文还显示了如何将建议的控制器应用于其他发动机配置。

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