Fuel injection system

Claim 1

A fuel injection system for an internal combustion engine having at least one cylinder with an intake opening and an exhaust opening and an exhaust opening comprising: a. a fuel injector comprising a closed reservoir of a size at least as great as the volume of the maximum amount of fuel to be injected into the cylinder in any intake phase, said reservoir being in communication with the inside of the cylinder through a duct terminating in an atomizer; b. a fuel source; c. pumping means including automatic control means in communication with said reservoir and said fuel source and adapted to supply fuel continuously from said source to said reservoir at a selectively variable rate responsive to engine speed and to the pressure in said intake opening, said pumping means delivering fuel at such a rate that there will be collected in the reservoir substantially between one intake phase and the next one only the quantity of fuel necessary to provide a predetermined air/fuel ratio when combined with each air charge supplied to the cylinder during the intake phase; d. a source of gas under pressure in communication with said reservoir for intermittently supplying a gas flow into said reservoir; and e. means for controlling the supply of such gas so that it will be fed in Phase with the opening of the engine intake valve and at a pressure adapted to force and atomize the metered quantity of fuel which has been collected in the reservoir during the interval between one intake phase and the next one into the air charge being supplied to such cylinder.