An engine includes side plates and inner plates, cylinders installed inside the side plates and the inner plates, having a piston compression chamber, and having an inverted triangular shape and an equilateral triangular shape, an integrated crankshaft rotatably installed to pass through central regions of the inner plates and having crank-eccentric shafts eccentrically formed at both ends thereof, eccentric cams installed in the crank-eccentric shafts as eccentric driving holes and positioned in the piston compression chamber, elliptical rotor pistons rotatably installed on outer peripheral surfaces of the eccentric cams as eccentric cam bearings and eccentrically rotated in opposite directions, and eccentric cam eccentric shafts integrally formed at both ends of the eccentric cams and rotatably connected to an eccentric shaft bearing of a rear eccentric shaft and an eccentric bearing of an output shaft.

The present invention relates to a multi-cylinder rotary engine having triangular cylinders. The present invention only applies to a multiple-type rotary engine having triangular cylinders and an elliptical rotor piston, from among rotary engines having various structures. Therefore, by applying a serial type of the present invention, whereas a parallel type has to be used in a multi-cylinder type engine according to the prior art, effects of addressing a rotation error during operation and improving durability are achieved because an integrated-type crank shaft, rather than a separated assembly type which is complicated and weak at a crank shaft portion, can be used. Also, in the serial-type structure, as the number of components such as parallel shafts, gears, etc. is greatly reduced, the size of the engine is also reduced to improve economic efficiency, and moreover, noise and a failure rate are lowered, which ultimately contributes to the extension of the lifespan of the engine and miniaturization of the engine. In addition, although ignition and explosion locations of the cylinders are different from each other, deformation at one side (ignition, explosion, and opposite position), which is one of the problems of rotary engines, is reduced, and thus, an effect of contributing to the extension of the lifespan of the engine is provided.

A rotary roller motor is disclosed herein. The rotary roller motor is a four-stroke internal combustion engine, wherein the rotor “rolls” around the inside of the engine block. The rotor is a two-part rotor having an inner part with a shaft and an offset circular lobe, and an outer rotor fit around the lobe. Two barriers are provided around the rotor chamber, a compression/power barrier and an exhaust/intake barrier. The combustion chamber has a non-reversing compression barrier and a compression hold barrier regulating the combustion of gas.

A rotary internal combustion engine including a rotor assembly where at least a first and a second of the combustion chambers have unequal theoretical volumetric ratios. Also, a rotary internal combustion engine including first and second rotor assemblies where at least one of the combustion chambers of the first rotor assembly and at least one of the combustion chambers of the second rotor assembly have unequal effective volumetric compression ratios and/or unequal effective volumetric expansion ratios.

A compound engine assembly including an air conduit having an inlet in fluid communication with ambient air around the compound engine assembly, a compressor having an inlet in fluid communication with the air conduit, an engine core including at least one rotary internal combustion engine and having an inlet in fluid communication with an outlet of the compressor, a turbine section having an inlet in fluid communication with an outlet of the engine core and configured to compound power with the engine core; and at least one heat exchanger in fluid communication with the air conduit, each heat exchanger configured to circulate a fluid of the engine assembly in heat exchange relationship with an airflow from the air conduit circulating therethrough. A method of supplying air to a compound engine assembly is also discussed.

The invention relates to a modular construction system for a piston machine (100), comprising at least two separate housing parts capable of being joined together into a housing (1) of the piston machine (100), a piston (15) which is configured as a swivel element, is pivotable and is able to be arranged in the housing (1), and a housing cover (7) for covering the housing (1). The piston machine (100) is in particular configured as a modular construction system, the components of which are formed by multiple segments and joined together in a horizontal and a vertical direction in each case. The invention further relates to a piston machine (100) produced using the modular construction system and to a method for producing a piston machine (100).

A cylinder is installed within a case, and an output shaft and an arm that is integrated thereto and extends in a radial direction are installed within the cylinder. A piston extending in an arc slides and is displaced in a circumferential direction of the cylinder within the cylinder. One end portion of the piston is rotatably connected to the arm. The cylinder is internally provided with a first pressure chamber in which the arm is housed and a second pressure chamber in which the other end portion of the arm is slidably installed. A pressure medium is fed into one of the first and second pressure chambers and discharged from the other, and the output shaft pivots in a rotational direction.

A rotary motor with a geared transmission which contains a stator which is procured with triangular cavities which are procured with rounded peaks from which into each is led in at least one canal for entry and exit of compressible medium where in each cavity is embedded a rotary piston with an elliptical crosscut in the way that its lengthwise axis which is parallel with an axis of a rotary element is displaced regarding to a lengthwise axis of the inner cavity of the stator to reach a planetary movement of the rotary piston where the mutual coupling of the rotary pistons with a driven mechanism is achieved by led out of following pins of the rotary pistons out of the cavities of the stator where they are procured with rotary cog wheels which are mutually coupled with the geared elliptical rotary element which is connected with the driven mechanism.

A pneumatic engine includes a plurality of pneumatic motors and an engine drive shaft. Each motor has a motor gas inlet, a motor gas outlet, and a rotor driven by gas flow between the motor gas inlet and the motor gas outlet. The engine drive shaft is drivingly coupled to the motor drive shaft of each of the pneumatic motors.

A compound engine assembly with at least one rotary internal combustion engine, an impulse turbine, and an exhaust pipe for each internal combustion engine providing fluid communication between the exhaust port of the respective internal combustion engine and the flow path of the turbine. Each exhaust pipe terminates in a nozzle. For each exhaust pipe, a ratio Vp/Vd between the pipe volume Vp and the displacement volume Vd of the respective internal combustion engine is at most 1.5. A minimum value of a cross-sectional area of each exhaust pipe is defined at the nozzle. In one embodiment, a ratio An/Ae between the minimum cross-sectional area An and the cross-sectional area Ae of the exhaust port of the respective internal combustion engine is at least 0.2. A method of compounding at least one rotary engine is also discussed.