In-cycle combustion feedback control for abnormal combustion based on digital ion current signal

For better stability of ion current employed for in-cycle combustion diagnosis and feedback control, this research develops a digital post-processing unit for in-cylinder ion current signals. Based on the processed digital ion current signal, abnormal combustion in gasoline direct injection engine is successfully detected, and the in-cycle remedy feedback control is achieved as well. Both re-ignition and re-injection are utilized for misfiring remedy, and only re-injection is employed for knocking inhibition. The accuracy of misfiring diagnosis is achieved no less than 94%, and the re-injection combined with re-ignition operation is shown to be feasible for misfiring remedy as well. The accuracy of knocking diagnosis is around 85% (knocking rate = 20%). The re-injection under the pre-knocking condition is shown to be effective for knocking inhibition.

[1]  T. Johnson.  Review of Vehicular Emissions Trends , 2015 .

[2]  Eiji Tomita,et al.  Ion current measurement in a homogeneous charge compression ignition engine , 2005 .

[3]  Zuo-hua Huang,et al.  The interdependency between the maximal pressure and ion current in a spark-ignition engine , 2013 .

[4]  Guy A. Dumont,et al.  Towards an Improved Knock Detection and Quantification using Wavelets and Entropy-based Noise Compensation , 2005 .

[6]  Giorgio Rizzoni,et al.  IMPROVED KNOCK DETECTION BY ADVANCED SIGNAL PROCESSING , 1995 .

[7]  Robert W. Dibble,et al.  Combustion Timing in HCCI Engines Determined by Ion-Sensor: Experimental and Kinetic Modeling , 2005 .

[8]  Nick Collings,et al.  Knock Detection by Means of the Spark Plug , 1986 .

[9]  Jun Deng,et al.  Effect of Stratification on Ion Distribution in HCCI Combustion Using 3D-CFD with Detailed Chemistry , 2013 .

[10]  S. Pischinger,et al.  Optical Investigation on the Origin of Pre-Ignition in a Highly Boosted SI Engine Using Bio-Fuels , 2013 .

[11]  Jun Deng,et al.  Cycle Resolved Combustion and Pre-Ignition Diagnostic Employing Ion Current in a PFI Boosted SI Engine , 2015 .

[12]  Haifeng Lu,et al.  Misfire detection and re-ignition control by ion current signal feedback during cold start in two-stage direct-injection engines , 2014 .

[14]  J. Eng.  The Effect of Spark Retard on Engine-out Hydrocarbon Emissions , 2005 .

[15]  Jun Deng,et al.  In-Cycle Knocking Detection and Feedback Control Based on In-Cylinder Pressure and Ion Current Signal in a GDI Engine , 2016 .

[16]  Joseph Micallef,et al.  Ion current combustion technology for controlled auto-ignition gasoline engines , 2007 .

[17]  Fuquan Zhao,et al.  Automotive Gasoline Direct-Injection Engines , 2002 .

[18]  M. Taveniku,et al.  Estimating pressure peak position and air-fuel ratio using the ionization current and artificial neural networks , 1997, Proceedings of Conference on Intelligent Transportation Systems.