VECOM Low Temperature Combustion

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Part 1: Gasoline Low Temperature Combustion VECOM Workshop, Prague, March 14-15, 2012
Outline • Why consider low temperature combustion (LTC) for gasoline engines • Tools used to study LTC • Improving efficiency with LTC – Naturally aspirated LTC – Boosted LTC • Ignition and combustion constraints of LTC and the need for three combustion modes: HCCI, SACI, SI • Combustion phasing • Ringing and misfire limits • Emissions • Summary • Future challenges VECOM Workshop 5 Prague, March 14-15 2012
Page 1 and 2: Low Temperature Combustion Stanisla
Page 3: My research interests: Using thermo
Page 7 and 8: Normal (High) Temperature Combustio
Page 9 and 10: Tools for studying LTC VECOM Worksh
Page 11 and 12: Improving efficiency with LTC VECOM
Page 13 and 14: Carnot Cycle Efficiency For a gasol
Page 15 and 16: Otto Cycle Efficiency 1 1 CR ( 1)
Page 17 and 18: Increasing Compression Ratio - Real
Page 19 and 20: Otto Efficiency (%) 1 1 CR Increa
Page 21 and 22: Increasing Ratio of Specific Heats
Page 23 and 24: Real Engine Effects Real engines do
Page 25 and 26: Engine Model - Operating Conditions
Page 27 and 28: Effect of Phi on Naturally Aspirate
Page 29 and 30: Effect of Phi on Boosted Engine Eff
Page 31 and 32: Ignition and combustion constraints
Page 33 and 34: Ignition and Combustion with LTC Co
Page 35 and 36: Ignition and Combustion with Natura
Page 37 and 38: Combustion Phasing The simulations
Page 39 and 40: Ringing and misfire limits VECOM Wo
Page 41 and 42: HCCI Ringing Limit HCCI and SACI ca
Page 43 and 44: HCCI Ringing Limit Three commonly u
Page 45 and 46: HCCI Ringing Limit 3) Combustion No
Page 47 and 48: HCCI Ringing Limits Comparison of t
Page 49 and 50: IMEP g [kPa] Combining HCCI Ringing
Page 51 and 52: Emissions from HCCI VECOM Workshop
Page 53 and 54: Emissions from HCCI We’ll conside
Page 55 and 56:
Emissions from HCCI Smoke Meter PM
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Emissions from HCCI NO x Emissions
Page 59 and 60:
PM (mg/m3) PM Emissions from HCCI 4
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Summary • Significant efficiency
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Future challenges 1. Optimization o
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Outline • Why consider low temper
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Conventional Diesel Combustion Good
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Reducing emissions with diesel LTC
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Phi - T Diagram Soot 1600-2400K Ide
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Diesel LTC Concept Reduce PM and NO
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Experimental Setup Engine Manufactu
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Implementation of LTC on a diesel e
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Implementation of LTC on a Diesel E
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Operating Conditions Lean Conv. Lea
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Engine-Out HC Composition by Carbon
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Late-Forming Species (Engine-Out) R
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DOC Conversion Efficiency VECOM Wor
Page 97 and 98:
Why Does the DOC Perform Poorly wit
Page 99 and 100:
Why Does the DOC Perform Poorly wit
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Summary VECOM Workshop 101 Prague,
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Future challenges VECOM Workshop 10
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Thank you for your attention! E-mai
Page 107 and 108:
Acknowledgements - Projects • Mar
Page 109:
Selected Diesel LTC References Nort
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VECOM Low Temperature Combustion

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