Abstract: A fuel system for an internal combustion engine of the piston type vaporizes liquid fuel such as gasoline and delivers the same through inter-communicating control valves, one of which is responsive in operation to inlet manifold pressure in the internal combustion engine and the other responsive in operation to accelerator linkage controlling the internal combusion engine's operation. The system's principal point of novelty is a hot fuel gas generator which combines a heat exchanger preferably electrically energized and a communicating valve which is responsive in operation to inlet manifold pressure. The system includes a device for delivering liquid fuel to the hot fuel gas generator and means establishing communication between the inlet manifold pressure responsive valve, the accelerator linkage actuated control valve, and an adaptor block mounted on the inlet manifold of the internal combustion engine.

Abstract: A fuel system for an internal combustion engine of the piston type vaporizes liquid fuel such as gasoline and delivers the same through a series of intercommunicating control valves, two of which are responsive in operation to inlet manifold pressure in the internal combustion engine and another of which is responsive in operation to accelerator linkage for controlling the internal combustion engine's operation. The system includes a hot fuel gas generator which is preferably electrically energized, a device for delivering liquid fuel to the generator and tubes establishing communication between the generator, the inlet manifold pressure responsive valves, the accelerator linkage mechanical control valve, and an adaptor block mounted on the inlet manifold of the internal combustion engine. A conventional carburetor may be carried on the adaptor block along with a conventional air cleaner as known in the art.