Internal combustion engine with dual-chamber cylinder

A single chamber cylinder engine comprising:

• a housing having a first cylindrical cavity for at least one piston;
• at least one head on top of said at least one cylindrical chamber for enclosing a top of said at least one cylindrical chamber;
• said at least one piston has a piston rod extending perpendicular from a bottom of said at least one piston;
• a low friction seal located on the bottom of said first cylindrical cavity to allow sealed constrained linear movement of said piston rod;
• said piston rod is secured to an elliptical shaft to convert reciprocating rectilinear motion into rotary motion;
• an exhaust valve that is operable from an exhaust lobe located on an output shaft, and
• an intake valve that is operable from an intake lobe located on said output shaft.

An elliptical shaft operable engine comprising:

• an internal combustion engine having at least one cylinder and at least one piston;
• said at least one piston has a piston rod extending perpendicular from a bottom of said piston and extending through a low friction seal in the bottom of said at least one cylinder;
• said piston operably slides with reciprocating rectilinear motion inside said at least one cylinder;
• said separate piston rod is secured to an elliptical, or similar configuration, shaft to convert reciprocating rectilinear motion into rotary motion between a bottom dead center location and a top dead center location;
• said piston rod is secured to an elliptical shaft to convert reciprocating rectilinear motion into rotary motion of an engine shaft;
• a distance between said bottom dead center and said top dead center is equal to half of the distance of a major axis and a minor axis of said elliptical shaft and each piston stroke will turn said internal combustion engine at 90 degrees;
• said elliptical, or similar configuration, shaft has an inside wall that pushes said at least one piston into said at least one cylinder and an outside wall that pulls said at least one piston out of said at least one cylinder;
• said ellirtical shaft further having a lobe for orerating an exhaust valve and a lobe for orerating an intake valve, and
• said at least one piston rod has bearings that engage said at least one piston rod on said elliptical shaft.