Pneumatic direct cylinder fuel injection system

A pneumatic direct cylinder fuel injection system for use in an internal combustion engine of the type having an engine block means with an air induction means for supplying induction air to a plurality of cylinders in the engine block means, with each cylinder having a piston reciprocable therein so as to define a combustion chamber which includes a stratified charge chamber as a portion thereof, said system including a plurality of pneumatic injectors, with each said pneumatic injector being supported by the engine block means in position to discharge an air/fuel mixture into an associate stratified charge chamber, each of said pneumatic injectors including a body means terminating at one end thereof in a nozzle body, a bore means through said body means and said nozzle body, a valve seat encircling said bore means at the outboard free end of said nozzle body, the opposite end of said bore means being connectable to a source of air at a predetermined pressure, a poppet valve operatively positioned in said bore means, said poppet valve including a head movable between an open position and closed position relative to said valve seat and a stem extending from said head and defining with said bore means an air passage, control means operatively associated with said poppet valve to normally maintain said poppet valve in said closed position and being operative to permit movement of said poppet valve to said open position and, an electromagnetic fuel injector operatively positioned in said body means for injecting pressurized fuel into said air passage upstream of said head of said poppet valve in terms of the direction of air flow through said air passage during a compression stroke of the piston in the associate cylinder, the arrangement being such that when the compression pressure reaches a predetermined pressure said poppet valve will be moved to a said valve closed position.