Two cycle stratified charge gasoline engine

A method for operating a stratified charge two cycle engine of the type comprising:

• a cylinder having an upper and a lower end with a head at said upper end and fuel and air intake ports at said lower end;
• at least one spark plug mounted in said head;
• a sleeve in said cylinder having an upper end and a lower end;
• said cylinder having exhaust ports at said upper end which are covered and uncovered by an upper end of said sleeve;
• a piston in said sleeve and connected to a crank shaft;
• a first exhaust manifold at one side of said cylinder at said upper end thereof opposite said exhaust ports in said cylinder and having first exhaust gas throttle valve means associated therewith;
• at least a first and a second fuel and air intake manifolds at one side of said cylinder and at said other side of said cylinder in communication with first and second fuel and air intake ports in said cylinder;
• throttle valve means in each intake manifold;
• a reed cage assembly in each intake manifold adjacent the associated intake port for injecting a fuel and air mixture into said cylinder;
• control means for controlling the injection of fuel and air mixture into said cylinder so that fuel and air mixture is injected into said cylinder through only one intake port when the engine is operating from zero to one half full load;
• and
• an operating connection between said crank shaft and said sleeve for causing reciprocation of said sleeve relative to movement of said piston to open and close said exhaust ports and said air and fuel intake ports in said cylinder,
• the method comprising the steps of:
• first supplying, when the engine is operating at partial load, air to the cylinder after combustion in a cycle of the piston;
• then, supplying, also when the engine is operating at partial load, fuel under pressure to only one of said reed cages;
• also supplying throttled air under pressure to said one reed cage to cause a reed in the cage to move slightly to aspirate fuel into the flowing air to create a mist-like mixture of fuel and air which is expressed into said cylinder on one side only while pressurized air is entering the cylinder through other air intake ports in said cylinder, while exhaust gases are exiting said cylinder at the top of said cylinder such that the fuel and air mixture enters said cylinder above the piston travels radially inwardly and then upwardly in a generally L-shaped path toward the cylinder head and along the other side of the cylinder;
• closing the exhaust ports with the sleeve;
• and,
• causing combustion of the fuel and air mixture in the cylinder.