Abstract: A fuel gasifier for an internal combustion engine having a gasification chamber, a device for injecting fuel into the chamber in droplets of about 30-50 microns or less in diameter, an ambient air inlet to the chamber with a flow control therefor, to admit a controlled amount of ambient air to mix with the fuel, a heater in the chamber to elevate the fuel temperature and convert the fuel to a gaseous state, a fuel and air mixing and transfer impeller in the chamber for increasing turbulence and propelling the mixture from the chamber, an annular venturi flow passage for flow of additional ambient air past the outside of the chamber, and a plurality of radial passages between the chamber and the venturi passage for flow of the turbulent mixture into the venturi passage and entrainment of the fuel and air mixture into the additional ambient air.