2006•Ranshao kexue yu jishuRequires access

Optimal Strategy for HCCI Combustion of Dual-Fuel

Yuan Xing

Abstract

Experimental study on HCCI combustion with EGR and different fuels, including single DME fuel, DME/Metha nol dual-fuel and DME/CNG dual-fuel was carried out. The results indicate that HCCI combustion of single DME is only a chieved in light load area. Maximum load of HCCI combustion with DME/Methanol dual-fuel can be extended as large as the middle load area of the original diesel. EGR can enlarge the controlled range of HCCI combustion with dual-fuel, but have little influence on its load broadening. Stratified charge compression combustion (SCCI) technique possesses potential to extend the load range of dual-fuel engine to large load area. The indicated thermal efficiency of HCCI with DME/Methanol dual-fuel is higher than that of HCCI with DME/CNG dual-fuel. At light load, higher indicated thermal efficiency can be achieved by adopting single DME HCCI combustion with EGR.

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Key concepts: Homogeneous charge compression ignition, Combustion, Automotive engineering, Diesel fuel, Thermal efficiency, Dual (grammatical number), Range (aeronautics), Materials science