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Diluted and Stoichiometric Combustion of Dual Fuel



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Lean Combustion 2004 Tomar Diluted and Stoichiometric Combustion of Dual Fuel Methane and Gas Oil Engine with HCCI Concept Okayama University Japan Eiji Tomita Nobuyuki Kawahara Background Increasing thermal efficiency reducing CO2 Reducing pollutant emissions HCCI low NOx no smoke Lean Slow speed low temperature combustion EGR Diluted stoichiometric Three way catalyst Time Homogeneous charge spark ignition Stratified charge spark ignition Flame propagation Dual fuel normal injection Dual Fuel Early injection PREDIC PCCI SCCI HCCI Auto ignition Experimental method Dual fuel engine methane diesel fuel high octane number high cetane number using a DI diesel engine Early injection 40 50 BTDC HCCI concept low NOx no smoke but rapid combustion with high NOx in high load EGR N2 dilution achieving mild combustion in high load Stoichiometric combustion ROHR and Exhaust emissions Single cylinder 4 stroke cycle Direct injection diesel fuel induction from intake port methane n 1000rpm inj TDC 50 BTDC Pilot injection t 0 4 1 1 0 37 5 Bore x stroke 92 x 96 mm Displacement 638 cm3 Compression ratio 17 7 1 Injector 4 holes 0 26mm Spray angle 150 Combustion chamber Deep dish Engine specifications and combustion chamber Flow meter Flow meter Light oil Injection pump Injection Pump Injection pump N2 gas Heater HeaterSurge Surge Heater tank tank Vaporizer Surge tank Vaporizer Methane gas Gas fuel Methane Gas Thermo meter Timing Timingbelt belt Flow meter Timing belt Surge Surge tank tank meter Flowmeter Flow Data recorder Mixer Water Oil Mix air Intake Flow meter Exhaust Intake Gap sensor Pressure Crank angle TDC Mixer Mixer Air Gas fuel Air Data Data recorder recorder Dynamometer Dynamometer N2 gas LightLight oil oil Thermo meter Thermo meter Experimental apparatus and method NOx NO meter X NOx meter HC HC meter HC meter Smoke meter Smoke meter Smoke meter Exhaust Exhaust Exhaust gas Normal injection timing Early injection timing Low temperature reaction due to diesel fuel One peak



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