A compound engine system including a Wankel engine having a recess defined in the peripheral wall of the rotor in each of the three rotating chambers, the recess having a volume of more than 5% of the displacement volume of the chambers. The expansion in the turbine section compensates for the relatively low expansion ratio of the rotary engine.

A device wherein rolling motion is obtained by energy obtained as a result of combustion of solid, liquid or gas fuel oil. The device has an elliptic disc installed onto a symmetric ball on a ball shaft in a body. A fuel oil injector inlet channel and ignition bobbin inlet channels are provided in the body. A rolling wall is installed onto the body and an exhaust outlet pipe. The rolling wall separates a symmetric body chamber into a suction chamber and combustion chamber. In one cycle rolling of elliptic disk, fuel-oil taken into the suction chamber is transferred to combustion chamber. Fuel oil taking and fuel-oil compressing and explosion thereof by ignition is conducted simultaneously and continuously and not interrupted.

A device wherein rolling motion is obtained by energy obtained as a result of combustion of solid, liquid or gas fuel oil. The device has an elliptic disc installed onto a symmetric ball on a ball shaft in a body. A fuel oil injector inlet channel and ignition bobbin inlet channels are provided in the body. A rolling wall is installed onto the body and an exhaust outlet pipe. The rolling wall separates a symmetric body chamber into a suction chamber and combustion chamber. In one cycle rolling of elliptic disk, fuel-oil taken into the suction chamber is transferred to combustion chamber. Fuel oil taking and fuel-oil compressing and explosion thereof by ignition is conducted simultaneously and continuously and not interrupted.

A rotary engine includes a shroud surrounding a rotor. The rotor carries at least one combustion chamber spaced from an axis of rotation of the rotor. A pressure activated valve, such as a relief valve, is located between the combustion chamber and obliquely arranged exhaust nozzles. A drive shaft is engaged to the rotor for mutual rotation. An ECU controls the combustion cycle of the engine based on a signal from a pressure sensor in the combustion chamber. A fuel control valve delivers fuel into the combustion chamber. An air control valve delivers pressurized air into the combustion chamber. The electronic control responds to the pressure signal from the pressure sensor to open the fuel control valve, to fire a spark plug and cause combustion of the fuel within the combustion chamber, and to thereafter open the air control valve to purge the combustion chamber of exhaust gasses. A method of operating the controls is also disclosed.

Rotary vane internal combustion engine comprises of two rotors, nested in each other, placed in a cylindrical housing, wherein each rotor has at least two radial vanes rigidly attached to the rotor that form chambers for intake, compression, combustion, and exhaust. Each rotor, alternately engages with a shaft by overrunning one-way clutches and held from turning back, through the cushioning mechanisms, mounted on flywheels, which are rigidly attached on the shaft, wherein the assembled rotors from the outside are rigidly closed by flanges on each of which is mounted at least one blade, which are placed into formed cavity between rotors and caps of the housing thereby forming two cooling chambers through which coolant circulates around rotors through openings in the housing and through longitudinal grooves in the shaft. On the vanes mounted cylindrical and conical seals that exclude the need for lubrication.

Rotary vane internal combustion engine comprises of two rotors, nested in each other, placed in a cylindrical housing, wherein each rotor has at least two radial vanes rigidly attached to the rotor that form chambers for intake, compression, combustion, and exhaust. Each rotor, alternately engages with a shaft by overrunning one-way clutches and held from turning back, through the cushioning mechanisms, mounted on flywheels, which are rigidly attached on the shaft, wherein the assembled rotors from the outside are rigidly closed by flanges on each of which is mounted at least one blade, which are placed into formed cavity between rotors and caps of the housing thereby forming two cooling chambers through which coolant circulates around rotors through openings in the housing and through longitudinal grooves in the shaft. On the vanes mounted cylindrical and conical seals that exclude the need for lubrication.

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.

The invention relates to a six-stroke rotary-vane internal combustion engine with hermetically sealed working space comprising a stator with at least one inlet and at least one outlet, a respective hole for at least one spark plug, and working chambers comprising of an air-fuel intake and compression, and of expansion and exhaust of combustion products working chamber; a cylindrical rotor rigidly fastened to a shaft with combustion chambers alternating with vane grooves made in the cylindrical surface and vanes fitted in the vane grooves; side walls; front and rear bearing shields. The whole working space of the engine is bound by parts rigidly and hermetically fastened to the stator. Composite prismatic pieces are placed into end grooves on both sides of the rotor, while the ends of said composite prismatic pieces are pushed by a first spring against the adjacent vanes and one of the longer sides of the composite prismatic pieces is pushed by a second spring against the side walls.

The invention relates to a six-stroke rotary-vane internal combustion engine with hermetically sealed working space comprising a stator with at least one inlet and at least one outlet, a respective hole for at least one spark plug, and working chambers comprising of an air-fuel intake and compression, and of expansion and exhaust of combustion products working chamber; a cylindrical rotor rigidly fastened to a shaft with combustion chambers alternating with vane grooves made in the cylindrical surface and vanes fitted in the vane grooves; side walls; front and rear bearing shields. The whole working space of the engine is bound by parts rigidly and hermetically fastened to the stator. Composite prismatic pieces are placed into end grooves on both sides of the rotor, while the ends of said composite prismatic pieces are pushed by a first spring against the adjacent vanes and one of the longer sides of the composite prismatic pieces is pushed by a second spring against the side walls.

A rotary-piston engine comprises a housing (4), a cylinder (5), a combustion chamber (10), a piston (11) with a device (12) for the reciprocating movement of the piston, and a rotor (1) connected to an output shaft (9). The rotor (1) is mounted on hinges (2), and sealing partitions (3) are provided both around the edge of the perimeter and on the sides, inside the housing (4). The cylinder (5) is provided with intake, exhaust and scavenging ports (6, 7, 8). Working combustion chambers (10) are provided on the outer surface of the rotor (1) in the form of recesses. Said recesses are configured to admit the entrance of truncated heads of pistons (11). The pistons (11) are arranged in a circle around the rotor (1) and move reciprocally in the cylinders (5) in a two- or four-stroke internal combustion engine working mode by means of device (12), which is connected to the working shaft (9).