VECOM Low Temperature Combustion

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Comparison of HCCI Ringing Parameters Experimental setup to compare HCCI ringing metrics: • Single cylinder research engine • Hydraulic valve actuation for NVOcontrolled HCCI • Bore / stroke = 86.0 mm / 94.6 mm • CR = 12.5 • Direct injection, side-mounted injector • 91 RON gasoline VECOM Workshop 46 Prague, March 14-15 2012
HCCI Ringing Limits Comparison of three commonly used ringing metrics using an HCCI single cylinder research engine 1 . HCCI SACI SI Different methods do not always show the same trends for different combustion modes. 1 Vavra, J., Bohac, S. V., Manofsky, L., Lavoie, G., Assanis, D., 2011, “Knock in Various Combustion Modes in a Gasoline-Fueled Automotive Engine,” Proceedings of the ASME 2011 Internal Combustion Engine Division Fall Technical Conference, ICEF2011-60124. VECOM Workshop 47 Prague, March 14-15 2012
Page 1 and 2: Low Temperature Combustion Stanisla
Page 3 and 4: My research interests: Using thermo
Page 5 and 6: Outline • Why consider low temper
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: HCCI Ringing Limit 3) Combustion No
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
Page 57 and 58: Emissions from HCCI NO x Emissions
Page 59 and 60: PM (mg/m3) PM Emissions from HCCI 4
Page 61 and 62: Summary • Significant efficiency
Page 63 and 64: Future challenges 1. Optimization o
Page 65 and 66: Outline • Why consider low temper
Page 67 and 68: Conventional Diesel Combustion Good
Page 69 and 70: Reducing emissions with diesel LTC
Page 71 and 72: Phi - T Diagram Soot 1600-2400K Ide
Page 73 and 74: Diesel LTC Concept Reduce PM and NO
Page 75 and 76: Experimental Setup Engine Manufactu
Page 77 and 78: Implementation of LTC on a diesel e
Page 79 and 80: Implementation of LTC on a Diesel E
Page 89 and 90: Operating Conditions Lean Conv. Lea
Page 91 and 92: Engine-Out HC Composition by Carbon
Page 93 and 94: Late-Forming Species (Engine-Out) R
Page 95 and 96: 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
Page 101 and 102:
Summary VECOM Workshop 101 Prague,
Page 103 and 104:
Future challenges VECOM Workshop 10
Page 105 and 106:
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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