In-cylinder Ion Sensing Opportunities

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Further Improvement Needed forQuantitative ApplicationHardware Development:– High speed sampling for cycleresolved ion signal– ECU throughput improvement forcycle resolved data processing– Current coil design tends to low-pass filter ion signal• Coil redesign required
Further Improvement Needed forQuantitative Application - (Cont.)<strong>Ion</strong> signals are also affected by:– Engine operating conditions– Fuel additives– Spark plug conditionMust quantify these effects byadditional fundamental research
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: Knock Detection at High SpeedIon si
Page 17 and 18: Fundamental Research - (Cont.)1.4Ig
Page 19 and 20: Location & Magnitude of Ionization
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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