1[1]Klimstra,Jacob.Carburetors for Gaseous Fuels-On Air to Fuel Ratio[C].Homogeneity and Flow Restriction.SAE paper 892141,1989.
2[2]Turner Sean H,Weaver Christopher S.Dual-Fuel/ Natural Gas Diesel Engines Technology Performance and Emissions[R].West Bryn Mawr Avenue Chicago:Engine Technolgy Group Gas Research Institute,1994.