文章基本信息

标题：Primary Study on the Transient EGR Control of GDI Turbocharged Engine by Ion Sensing Technology
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作者：Denghao Zhu ; Zhilin Chen ; Yuedong Chao 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2018
卷号：51
期号：31
页码：146-153
DOI：10.1016/j.ifacol.2018.10.027
语种：English
出版社：Elsevier
摘要：AbstractBased on a 1.0 L turbocharged GDI engine and product-level ion current detection system, the potential of using ion sensing technology for transient EGR control is studied. Firstly, ion sensing performance under steady-state EGR condition is studied. The result shows that the correlation coefficient between mean value of Imax, Isum and IMEP is over 0.96 under steady-state condition, but the cyclic variation of ion current signal is too high for control. Thus, the moving average method is used to effectively reduce the cyclic variation of ion current signal to the same level as cylinder pressure signal. Based on that, ion sensing and UEGO sensor performance under transient EGR condition is compared. The weighted moving average method is proposed optimized from the moving average method to shorten the response delay of ion current signal. The response delay could be reduced by 30% in the case study. Finally, the applicability of ion current signal under different operating conditions is studied. The result shows that ion current signal could be used for transient EGR control. However, if the variation of ion current signal is within the cyclic variation range of ion current signal, the variation of EGR is hard to be distinguished.
关键词：Keywordsion sensingtransient EGR controlsignal processing method