A combustion engine having a combustion chamber with a side port in a sidewall thereof interconnecting the combustion chamber with a side manifold. The side port is positioned between about 25% and about 75% of the stroke length from the bottom dead center position of the pistons. The engine includes a fluid injection system which provides an alcohol-water mixture to the side manifold to maintain the manifold at an elevated pressure. The pressure manifold is heated to provide for expansion of the fluids provided thereto and is readily removable to allow for normal functioning of the engine.
A gasoline internal combustion engine, including an engine block having a cylinder, fuel intake port and exhaust port therein. A piston is mounted in the cylinder for two-cycle, reciprocating movement therein, and includes an annular piston head and a cylindrical piston skirt, a connecting rod rotatably-mounted by a top end thereof to a piston roller bearing carried on a piston pin of the piston, and by a bottom end of the connecting rod to a crankshaft for outputting power from the reciprocating piston, the crankshaft mounted on a pair of spaced-apart crankshaft roller bearing assemblies, and an array of holes extending through the piston skirt for drawing gasoline from an opposing fuel intake side of the piston to the exhaust side of the piston on the downstroke of the piston to lubricate the exhaust side of the piston and cylinder without the mixture of engine oil with the gasoline.
