Patent ID: 6026769
Filing Date: 2000-02-22
Classification: F02B,F02M

Abstract:
An engine comprising:a two-stroke internal combustion engine having at least one cylinder;a head for the engine cylinder;an engine piston slidably received for linear reciprocation within each engine cylinder and defining a combustion chamber with the cylinder and its head and each engine cylinder and piston also defining in part a crankcase air chamber opposite the combustion chamber side of each engine piston, and a transfer passage in communication with the air chamber and selectively communicated with the combustion chamber to supply additional combustion air to the combustion chamber;a spark plug communicating with each combustion chamber;a crankshaft operably connected with each piston and powered to rotate in one direction by reciprocation of each piston;a compressor having an inlet to receive a rich fuel and air mixture and an outlet to deliver the compressed rich fuel and air mixture under superatmospheric pressure of at least 30 PSI to each cylinder;a carburetor having an outlet in communication with the inlet of the compressor to supply a rich fuel and air mixture to the compressor having a fuel to air ratio in the range of 1:2 to 1:12.5;a valve in the head of each engine cylinder and communicating the outlet of the compressor with the interior of the engine cylinder, a spring yieldably biasing the valve to a closed position and the valve opening against the bias of the spring and in response to a pressure differential across the valve to admit a compressed rich fuel and air mixture into the engine cylinder, said engine cylinder communicating with said compressor outlet only through said valve; anda transmission member operably connecting the compressor with the crankshaft to drive the compressor in timed relation to each engine piston to compress and deliver the rich fuel and air mixture from the carburetor to the combustion chamber of each cylinder where it is ignited by a spark plug to power the engine.