Abstract: A fuel vaporization device is provided wherein atomized liquid fuel is injected in timed sequence directly into the vacuum chambers of a rolling piston vacuum pump. Optionally, minute amounts of air are bled into the vacuum chamber as the liquid fuel droplets are injected resulting in substantially complete and immediate vaporization of the fuel which is fed as gaseous fuel from the vacuum pump to the intake manifold of an internal combustion engine. A water jacket surrounds the pump for circulating heated liquid coolant from the engine in heat exchange relationship with the fuel in the vacuum pump.

Abstract: A device for vaporizing liquid fuel for increasing burn efficiency within an internal combustion engine has been provided. Fuel is injected by means of a fuel injector (I) in timed sequence without the presence of air into a closed vacuum chamber (C) wherein the droplets of fuel are immediately changed to gaseous form. A pressurized oil lubrication system lubricates the piston walls and provides a vapor barrier within a rolling piston vacuum pump (P). Heat exchange means (H,H') are provided to maintain the temperature of the gaseous fuel substantially constant and at a lower vapor point to minimize recondensation as it is supplied to the intake manifold of the internal combustion engine. Control means (U) are provided to adjust both the frequency and duration of the injection liquid fuel droplets into the vacuum chamber (C).