An internal combustion engine featuring a radial array of cylinders and pistons; the pistons having rods including cam followers engaging the surface of a cam drive to transfer reciprocating linear motion into rotary motion; wherein between the piston rods and the engine housing are disposed arrays of toothed rollers to provide a rolling interface.

A two cycle-opposed piston, two cycle, homogenous charge compression ignition engine with cylinder sets, each cylinder set having a first cylinder with an intake port; a second cylinder coaxially aligned with the first cylinder and having an exhaust port; a first piston engaged within the first cylinder; a second piston engaged within the second cylinder; a combustion chamber formed between the first piston and the second piston; a first cam mechanically engaged with the first piston; a mechanical device to convert reciprocating motion to rotational motion connected to the second piston; and a charge pump connected to the intake port by an intake passage.

A two cycle-opposed piston, two cycle, homogenous charge compression ignition engine with cylinder sets, each cylinder set having a first cylinder with an intake port; a second cylinder coaxially aligned with the first cylinder and having an exhaust port; a first piston engaged within the first cylinder; a second piston engaged within the second cylinder; a combustion chamber formed between the first piston and the second piston; a first cam mechanically engaged with the first piston; a mechanical device to convert reciprocating motion to rotational motion connected to the second piston; and a charge pump connected to the intake port by an intake passage.

A piston drive device includes: a motor; an eccentric body provided at an eccentric position with respect to a rotation axis of the motor and revolving about the rotation axis in conjunction with rotation of the motor; a piston holder swinging about the rotation axis in conjunction with revolving of the eccentric body; and pistons held by the piston holder in such a manner as to be positioned radially about an eccentric axis of the eccentric body, wherein the pistons are arranged in a same plane perpendicular to the eccentric axis.

A piston drive device includes: a motor; an eccentric body provided at an eccentric position with respect to a rotation axis of the motor and revolving about the rotation axis in conjunction with rotation of the motor; a piston holder swinging about the rotation axis in conjunction with revolving of the eccentric body; and pistons held by the piston holder in such a manner as to be positioned radially about an eccentric axis of the eccentric body, wherein the pistons are arranged in a same plane perpendicular to the eccentric axis.

The present invention provides a system for the reversible transformation of a reciprocating motion in a rotary motion, which comprises one or more actuating devices (11) adapted to cooperate on at least one interaction surface of a spiral profiled rotor (3), the system it is characterized in that each actuating device of said plurality of actuating devices (11) comprises hydraulic or internal combustion cylinders; the arrangement being such that each actuating device (11) urges a tubular slidable rod coupled to a respective cylinder, said tubular rod being associated with a slider (5), the slider (5) being adapted to transmit the thrust of said tubular rod (6) on said at least one interaction surface of the spiral profiled rotor (3) creating a torque on said rotor (3).

An engine compressor unit including at least one rotary engine; and at least one rotary compressor for compressing at least one gaseous fluid; the rotary engine including an engine housing including at least one engine ring that is rotatably supported in the engine housing about an engine axis, at least one engine cylinder that is arranged in the engine ring, wherein an engine piston is arranged in the at least one engine cylinder so that the engine piston defines a combustion chamber of the at least one engine cylinder together with a wall of the at least one engine cylinder, wherein the engine piston is supported in the at least one engine cylinder by an engine connecting rod so that the engine piston is movable in the at least one engine cylinder in a linear manner.

An engine compressor unit including at least one rotary engine; and at least one rotary compressor for compressing at least one gaseous fluid; the rotary engine including an engine housing including at least one engine ring that is rotatably supported in the engine housing about an engine axis, at least one engine cylinder that is arranged in the engine ring, wherein an engine piston is arranged in the at least one engine cylinder so that the engine piston defines a combustion chamber of the at least one engine cylinder together with a wall of the at least one engine cylinder, wherein the engine piston is supported in the at least one engine cylinder by an engine connecting rod so that the engine piston is movable in the at least one engine cylinder in a linear manner.

System for the reversible transformation of a reciprocating motion in a rotary motion, which may include one or more actuating devices adapted to cooperate with a rotor which has a spiral shaped section, and has at least one interaction surface for interacting with said one or more actuating devices. Each actuating device of said plurality of actuating devices is an internal combustion cylinder and piston device. Each actuating device is associated with a rod which incorporates a slider with a follower which engages with said at least one interaction surface of said rotor.

Disclosed is an offset rotational internal combustion engine in which an outer ring rotates on a one axis and an inner disk rotates on a second offset axis. Pistons are connected to the outer ring, while cylinders and other devices for operating the engine are mounted within an inner disk that rotates on a second axis that is offset from the axis of the outer ring. The inner disk and outer ring rotate together, such that the pistons create conditions of compression and explosive expansion within the cylinders without vibrating reciprocal piston motion. A unique fuel injection system is also disclosed that provides a variable fuel pressure that is created by centrifugal forces on the fuel. Because of the rotating inner disk and outer ring, advantages are taken of centrifugal force and gravity to distribute fuel, air, oil, high-voltage current, and cooling air in the engine.