The present manuscript discusses the performance and emission benefits due to two diesel injections in diesel-ignited methane dual fuel Low Temperature Combustion (LTC). A Single Cylinder Research Engine (SCRE) adapted for diesel-ignited methane dual fuelling was operated at 1500 rev/min and 5 bar BMEP with 1.5 bar intake manifold pressure. The first injection was fixed at 310 CAD. A 2nd injection sweep timing was performed to determine the best 2nd injection timing (as 375 CAD) at a fixed Percentage Energy Substitution (PES 75%). The motivation to use a second late injection ATDC was to oxidize Unburnt Hydrocarbons (HC) generated from the dual fuel combustion of first injection. Finally, an injection pressure sweep (550-1300 bar) helped achieve simultaneous reduction of HC (56%) and CO (43%) emissions accompanied with increased IFCE (10%) and combustion efficiency (12%) w.r.t. the baseline single injection (at 310 CAD) of dual fuel LTC.
|Advisor:||Srinivasan, Kalyan K., Krishnan, Sundar R.|
|Commitee:||French, William T.|
|School:||Mississippi State University|
|School Location:||United States -- Mississippi|
|Source:||MAI 55/01M(E), Masters Abstracts International|
|Keywords:||Diesel-methane, Dual fueling, Dual injection, Engine performance and emissions, Hc-nox tradeoff, Low temperature combustion|
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