The Rotary Roller Motor (RRM) is a four cycle rotary internal combustion engine that uniquely overcomes many of the drawbacks of other rotary type engines, by having the Rotor roll around the inside of the engine block, rather than scraping it. This is accomplished with a two part rotor. The inner part of the rotor is composed of a Rotor Shaft (RS-12) with an Offset Circular Lobe (OCL-11) rigidly attached to it. The Outer Rotor (OR-9) fits symmetrically around the Offset Circular Lobe, with Inter Rotor Bearings (IRB-10) between the two to allow free movement. The four cycles are separated by two barriers; the Compression/Power Barrier (CPB-13), and the Exhaust/Intake Barrier (EIB-6). Compression is controlled by two non-reversing barriers, the Non-reversing Compression Barrier (NCB-3) and the Compression Hold Barrier (CHB-14), on either side of the Combustion Chamber (CC-2).

A control system for a compression ignition engine configured to start compression ignition combustion by igniting mixture gas formed by injecting fuel into combustion chambers is provided, which includes combustion chambers each defined in respective cylinders so that displacements of the combustion chambers change by respective pistons reciprocating, a throttle valve, ignition plugs, injectors, a sensor having measuring parts including an atmospheric-pressure detector configured to detect an atmospheric pressure, and configured to measure parameters related to operation of the engine, and a controller. The controller executes a lean compression ignition combustion control in which compression ignition combustion is performed at a given lean air-fuel ratio higher than a stoichiometric air-fuel ratio. The controller restricts the execution of the lean compression ignition combustion control when the controller determines that the atmospheric pressure is lower than a given threshold based on a signal outputted from the atmospheric-pressure detector.

A control system for a compression ignition engine configured to start compression ignition combustion by igniting mixture gas formed by injecting fuel into combustion chambers is provided, which includes combustion chambers each defined in respective cylinders so that displacements of the combustion chambers change by respective pistons reciprocating, a throttle valve, ignition plugs, injectors, a sensor having measuring parts including an atmospheric-pressure detector configured to detect an atmospheric pressure, and configured to measure parameters related to operation of the engine, and a controller. The controller executes a lean compression ignition combustion control in which compression ignition combustion is performed at a given lean air-fuel ratio higher than a stoichiometric air-fuel ratio. The controller restricts the execution of the lean compression ignition combustion control when the controller determines that the atmospheric pressure is lower than a given threshold based on a signal outputted from the atmospheric-pressure detector.

Engine for producing mechanical energy by internal combustion of a fuel includes a shaft and a crank arm attached to the shaft. The engine further includes a casing, where the interior of the casing forms a hollow cavity dimensioned to allow the crank arm to rotate within the hollow cavity and the crank arm is capable of making a seal with the interior surface of the casing to block fluid passage. The interior of the casing also includes a bypass area that allows fluid passage around the crank arm. A first valve is positioned adjacent to the bypass area and a second valve is positioned adjacent to the bypass area opposite from the first valve. The first valve and the second valve are configured to block fluid passage when closed.

A rotary engine with axially directly connected compression and power cylinders is disclosed, which includes a compression cylinder, a power cylinder, an intermediate cylinder wall located between the compression and the power cylinder to serve as a common inner-end wall of the two cylinders, and a combustion chamber unit fixed to a circumferential surface of the intermediate cylinder wall, so that the rotary engine has axially directly connected compression and power cylinders. A compression-side and a power-side rotational valve are separately fitted in two recessed end surfaces of the intermediate cylinder wall. The compression-side and the power-side rotational valve are provided with three L-shaped first and second openings, respectively. Compressed air-fuel mixture in the compression cylinder flows through the L-shaped first openings into the combustion chamber, and high temperature high pressure gas generated after explosion in the combustion chamber unit flows through the L-shaped second openings into the power cylinder.

A rotary engine with axially directly connected compression and power cylinders is disclosed, which includes a compression cylinder, a power cylinder, an intermediate cylinder wall located between the compression and the power cylinder to serve as a common inner-end wall of the two cylinders, and a combustion chamber unit fixed to a circumferential surface of the intermediate cylinder wall, so that the rotary engine has axially directly connected compression and power cylinders. A compression-side and a power-side rotational valve are separately fitted in two recessed end surfaces of the intermediate cylinder wall. The compression-side and the power-side rotational valve are provided with three L-shaped first and second openings, respectively. Compressed air-fuel mixture in the compression cylinder flows through the L-shaped first openings into the combustion chamber, and high temperature high pressure gas generated after explosion in the combustion chamber unit flows through the L-shaped second openings into the power cylinder.

A continuously variable turbine includes a case assembly with a case body defining a chamber, a rotor assembly positioned in the chamber, and a pair of valve assemblies. The rotor assembly includes a ring piston and a rotor body positioned within the ring piston. The rotor body is connected to a shaft, and the rotor body rotates concentrically about an axis extending through the shaft while the ring piston rotates eccentrically about the axis. Each valve assembly is positioned outside of the ring piston relative to the rotor assembly and includes a valve body and a seal component attached to the valve body. Each seal component has a surface with a curvature that matches the outer curvature of the ring piston to form a continuous surface seal between the seal component and the ring piston as the ring piston rotates eccentrically about the axis. The position of the continuous surface seals in the chamber defining a first sub-chamber and a second sub-chamber between the surface seals. The case body includes an intake port and an exhaust port for each sub-chamber.

A continuously variable turbine includes a case assembly with a case body defining a chamber, a rotor assembly positioned in the chamber, and a pair of valve assemblies. The rotor assembly includes a ring piston and a rotor body positioned within the ring piston. The rotor body is connected to a shaft, and the rotor body rotates concentrically about an axis extending through the shaft while the ring piston rotates eccentrically about the axis. Each valve assembly is positioned outside of the ring piston relative to the rotor assembly and includes a valve body and a seal component attached to the valve body. Each seal component has a surface with a curvature that matches the outer curvature of the ring piston to form a continuous surface seal between the seal component and the ring piston as the ring piston rotates eccentrically about the axis. The position of the continuous surface seals in the chamber defining a first sub-chamber and a second sub-chamber between the surface seals. The case body includes an intake port and an exhaust port for each sub-chamber.

A rotary engine with axially directly connected compression and power cylinders is disclosed, which includes a compression cylinder, a power cylinder, an intermediate cylinder wall located between the compression and the power cylinder to serve as a common inner-end wall of the two cylinders, and a combustion chamber unit fixed to a circumferential surface of the intermediate cylinder wall, so that the rotary engine has axially directly connected compression and power cylinders. A compression-side and a power-side rotational valve are separately fitted in two recessed end surfaces of the intermediate cylinder wall. The compression-side and the power-side rotational valve are provided with three L-shaped first and second openings, respectively. Compressed air-fuel mixture in the compression cylinder flows through the L-shaped first openings into the combustion chamber, and high temperature high pressure gas generated after explosion in the combustion chamber unit flows through the L-shaped second openings into the power cylinder.

An engine includes a housing and a combustion assembly. The combustion assembly includes an annular bore and a combustion piston assembly disposed within the annular bore. The combustion piston assembly includes a set of pistons, a first sealing ring connected to each piston and a second sealing ring connected to each piston. The second sealing ring is configured to provide selective access between the annular bore and at least one fluid conduit carried by the engine. The engine includes at least one valve configured to move between a first position within the annular bore to allow the combustion piston assembly to travel within the annular bore from a first location proximate to the at least one valve to a second location distal to the at least one valve and a second position within the annular bore to define a combustion chamber.