In-cylinder Ion Sensing Opportunities

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Characteristics of Ion Signal0.40.350.3Location of the peak ionizationsignal from spark commandSignal reflectingthe sparkPeak of the ionization signalThe characteristicsof ion signal:–Peak–Peak location–AreaIon Signal, volts0.250.20.150.10.050Ignition dwellInitial Ionizationassociated withthe flame front1.0950 10 20 30 40TIME (ms)φ =Area covered by the ionization signalIonization under controlledenvironment
Location & Magnitude of Ionization Peaks andIntegration of Ionization - Combustion Bomb ResultIntegration of Ionization, volt. ms400350300250200150100500Integration - Test 1Integration - Test 2Integration - Test 30.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5phiLocation of the Peak Ionization from spark, ms4540353025201510Location of Peak Ionization (ms) - Test 1Location of Peak Ionization (ms) - Test 2Location of Peak Ionization (ms) - Test 30.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5phiPeak Magnitude, volts0.450.400.350.300.250.200.150.100.050.00Peak Ionization - Test 1Peak Ionization - Test 2Peak Ionization - Test 30.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5phi• The timing of the peak ion signal isminimum at slightly rich• The area covered by ion signal peaksat slightly rich, but decays faster onthe lean side• Peak magnitude of ion signal showssimilar trends as area covered by theion signal
Page 1 and 2: Designing Electronic Powertrain Con
Page 3 and 4: What Is Ion Sensing?• Ion Sensing
Page 5 and 6: Mechanism of In-cylinder Ion Sensin
Page 7 and 8: Mechanism of In-cylinder Ion Sensin
Page 9 and 10: Example Hardware ofIn-cylinder Ion
Page 11 and 12: Current EffortsEarly knock detectio
Page 13 and 14: Knock Detection at High SpeedIon si
Page 15 and 16: Further Improvement Needed forQuant
Page 17: Fundamental Research - (Cont.)1.4Ig
Page 21 and 22: Speed Effect on Ion SignalIonizatio
Page 23 and 24: Equivalence Ratio Effects atHigher
Page 25 and 26: Location of Peak Ionization Signal-
Page 27 and 28: Summary• The development of ion s
Page 29 and 30: Summary - (Cont.)• Engine operati

In-cylinder Ion Sensing Opportunities

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