Abstract: An engine with an output shaft extending through the engine block and generally parallel to the piston, the engine includes a boost piston cylinder integral to the cylinder, and a boost piston for producing compressed air so as to supercharge the engine. The engine further includes an energy translation mechanism translating linear movement into rotary movement, an energy translation mechanism for reducing the side force that the piston exerts against the inner wall of the combustion chamber, an energy transforming member working in concert with an engine torque absorbing/motion control torque reaction device to eliminate the lemniscate motion from being translated to the piston and to absorb all engine torque to case ground through a rolling element bearing, and a port time control system having a shaft phaser to adjust the phase of the pistons or the position of the air control valve.

Abstract: An internal combustion engine including a working chamber assembly housing, intake and exhaust ports, a pair of piston assemblies each of which assemblies includes at least one pair of diametrically opposed pistons within the working chamber assembly housing rotatable about a rotational axis of said piston assemblies, means for interconnecting said first and second piston assemblies for variable speed rotation in the same direction during recurrent periods of rotation, wherein the piston having a piston head and a piston vessel, the piston head of one piston assembly received by the piston vessel of the other piton assembly to form a working chamber. The connecting means includes a pair of internal gears, a plurality of planetary gears and means for transmitting variable speed rotation, a main transmission gear set, and a pair of auxiliary means that is connected to the piston assemblies.

Abstract: The problems of prior compressor structures relying upon conventional check valves are obviated by using, instead, flow control passages which operate to control flow while avoiding mechanical moving elements which may become problematical.

Abstract: A rotary apparatus with an enclosure formed by a hollow curved housing along with two sleeves, with two vanes within the enclosure, where one vane is fitted on each sleeve and the space within the enclosure is partitioned into two segregated volumes by the vanes which can rotate along with the sleeve that the individual vane is fitted on, by use of the timing devices, couplings, brakes and shaft, resulting in a sequence of alternate, independent or simultaneous rotation and stopping of vanes that leads to increase and decrease of volume of the segregated spaces, in a fashion that results in a thermodynamic gas cycles with Variable Compression ratio.

Abstract: Provided is a cat-and-mouse type internal combustion engine of concentric two-rotor/six-piston type, which has a cooling chamber in its cylinder housing and which needs neither any lubricating oil nor any valve mechanism so that its structure is simple and compact and can be easily manufactured. Further provided are a variable correlation type crank for a constant-pressure burning (CPB) engine of a variable compression ratio, and an inertial correlation type crank for a premixed compression ignition (HCCI), thereby to realize an internal combustion engine, which matches fuels of various kinds and which has a high energy efficiency and a clean exhaust gas.

Abstract: Disclosed herein is a housing wheel engine that has a wheel shaped combustion housing, the housing wheel engine can hold several pistons which both sides working inside the combustion housing. The housing wheel engine transfers its rotating movement directly to the driveshaft by the planetary gearsets. A four-stroke time mechanism provided by the planetary gearsets.

Abstract: In a revolving piston device that is used to make a four stroke internal combustion engine, revolving piston pairs (22, 23, 24, 25) are made to complete two cycles of one compression phase and one expansion phase each. The openings (2-7, 10-17, 34-36) on components of revolving piston device are made in such a way that an opening can be used for multiple flow passages to reduce unutilised space within controlled active volume that reduces unutilised expansion of gases or air within controlled active volume during respective power stroke. This also reduces loss of fresh gases trapped within the openings to exhaust manifold. This invention describes how to use same opening on various components of a revolving piston device for multiple flow passages to reduce overall losses.

Abstract: A rotary machine is provided having rotating forward and rearward work members having cyclic non-constant angle motion there between, the machine includes a rotating shaft and a first gear eccentrically mounted with the rotating shaft. A reaction gear in mesh with the first gear causes the first gear to rotate with respect to the rotating shaft. First and second connecting rods are pivotally connected with the first gear. First and second crank arms are pivotally connected with the respective first and second connecting rods. First and second coaxial shafts are connected with the respective first and second first crank arms. The first shaft is connected with at least one forward work member. The second shaft is connected with at least one rearward work member.

Abstract: The rotary nasal annular engine with noses on the annular with internal combustion operates on the principle of a pair of the first rotor (1) and the second rotor (2), as well as with usage of a block (3), where the rotors are placed and rotate synchronously. The block (3), together with the circumference surface (1.9), nose (1.2), (1.3) of the rotor (1) and the rotor (2) determinates the engine's combustion chamber (4.1), (4.2) in the shape of a torus, inside of which the rotor (1) is rotating with at least one nose (1.2). The rotor (2), contains, on its outer circumference surface (2.9), slots (2.7, 2.8), preferably, on its outer circumference surface, for the transition of the nose (1.2). During the nose's (1.2) transition through the slot (2.7), of the rotor (2), the compressed medium (7) is transferred through the storage system (2.5) of the rotor (2) through its intake opening (2.4) of the rotor (2) and through the outgoing opening (2.6) of the rotor (2) into the engine's combustion chamber (4.

Abstract: An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part.

Abstract: An oscillating piston machine comprises a housing in which a first and at least a second piston are arranged, which pistons can rotate together in the housing about a rotational axis which is fixed to the housing and which pistons, as they rotate about the rotational axis, carry out reciprocating oscillating movements in opposite directions to one another about an oscillation axis which extends perpendicularly to the rotational axis and through the center of the housing, wherein the first piston has a first end face and the at least second piston has a second end face which faces the first end face, wherein the end faces bound a working chamber. The pistons are arranged in such a way that the rotational axis extends through the working chamber.

Abstract: In a revolving piston device the revolving assemblies are made to complete one or more revolutions for every revolution of the elliptical gears. Port operating ring is used to open the intake passage for the travel of piston pair from TDC to BDC in one revolution of the elliptical gears and to open exhaust passage for the travel of piston pair from BDC to TDC during the next revolution of the elliptical gears. Lower speed of the revolving components induces less vibrations thus gives quite operation. Lower speeds of the elliptical gears allow higher speed of operation for revolving piston device. These types of engines can be used in automobiles, aero industries, marine ships, battlefield tanks, power generation and many other applications. The same concept can also be used to develop a revolving piston compressor or a revolving piston steam engine or a revolving piston two stroke internal combustion engine.

Abstract: A two-stroke opposite radial rotary-piston engine is proposed, comprising a block including sleeves, pairs of pistons disposed within the sleeves and oppositely movable, a power takeoff shaft, two parallel positioned rotors mounted thereon having an inner surface formed by a closed curved line. The rotors have concaved surface portions. Cross-like traverses are mounted, pair-wise spanning the pistons. The traverses are associated with engagement means, cooperating with the concaved portions. The engine comprises support bearings, coupled to the traverses. Support bearings include an external bushing, rolling over the rotor's inner surface, thereby impelling the rotor. The engagement means are mounted in the region of contact of the support bearings and rotors, thereby eliminating lateral force moment, extending the lifespan of the engine.

Abstract: A two-stroke opposite radial rotary-piston engine is proposed, comprising a block including sleeves, pairs of pistons disposed within the sleeves and oppositely movable, guiding bearings, a power takeoff shaft, rotors mounted thereon having an inner surface formed by a closed curved line, the rotors' transverse axes are predeterminedly disposed. On the frontal part, the rotors have concaved surface portions along the curved line. T-like traverses are mounted, pair-wise spanning the pistons. The traverses include convex protrusions, cooperating with the concaved portions during the start of the engine. A clearance between the concaved and convex portions is provided after the start. The engine comprises support bearings, coupled to traverses. Support bearings include an external bushing, rolling over the inner surface of the rotor associated with the traverse, thereby impelling the rotor.

Abstract: The orbital engine or pump comprising of drive train, having several elliptical gears each rotating around focal point with focal distance defined as function of minimum vanes opening, and toroidal cylinders each having inside two impellers with radial vanes continuously rotating with oscillation through a series of identical elliptical gears with one gear on each impeller shaft and second gears in mesh located on input/output shaft out of phase allowing synchronization of cycles performed in each chamber inside toroidal cylinders positioned planetary to input/output shaft. Some of the chambers could be selectively allocated to perform suction, compression, vacuum and combustion with air, gas, steam and liquid media through efficient internal rotary valves attached to impellers or housing and in most cases, eliminating the need for external valving.

Abstract: The invention discloses a rotary internal combustion engine that includes a cylinder with circular section, containing two identical cylinder blocks with semi-circular sections. Two identical rotors are installed within the cylinder block and are provided with four pistons with piston rings similar to the reciprocation engine. Two identical rotor shafts are vertically fixed on the two rotors respectively. Two non-circular gears are installed on the two rotor shafts separately, which engage with two eccentric gears respectively attached to one output shaft respectively. The rotors work four times every revolution, equivalent to the work done by a 4 cylinder 4 stroke internal combustion engine for every two revolutions of the crankshaft. The engine may include multi spark plugs or injectors, multi intake ports and multi exhaust ports. The engine may also combine multi cylinder blocks to provide larger output power.

Abstract: The rotary piston type internal combustion engine (E1) comprises an output shaft (1), a rotor (2), a housing (4), an annular operation chamber (5) formed by the rotor and housing on at least one side of the rotor in the axial direction of the output shaft for constituting an intake operation chamber, a compression operation chamber, a combustion operation chamber, and an exhaust operation chamber, a pressuring/pressured member (6) provided to the rotor for partitioning the annular operation chamber, two operation chamber partitions (7, 8) provided to the housing for partitioning the annular operation chamber, biasing mechanisms for biasing the operation chamber partitions toward their respective advanced positions, an intake port (11), an exhaust port (12), and a fuel injector (14), wherein the pressuring/pressured member (6) is constituted by an arc-shaped partition having first and second inclined surfaces and the operation chamber partitions (7, 8) are each constituted by a reciprocating partition reciproc

Abstract: A revolving piston engine incorporating revolving pistons for improving fuel efficiency, increasing power output, easy cooling and reduced vibration. One or more of revolving piston pairs, each consisting of one piston and one cylinder head, revolve within a ring cylinder, around a common axis in a same direction, but with different velocities. A revolving piston compressor is also disclosed, incorporating appropriately designed and relocated ports/valves for both of associated intake and outlet components.

Abstract: The invention relates to an oscillating piston engine comprising a housing that contains a first and at least a second piston, both of which can rotate about a fixed rotational axis in the housing and which when rotating about said axis execute counter-rotating displacements back and forth about a pivoting axis that runs perpendicular to the rotational axis through the centre of the housing. A working chamber is situated between opposing end faces of the first and at least second piston. The housing is provided with at least one gas exchange opening for admitting or discharging a gas into or from the working chamber. The pistons are arranged in such a way that the rotational axis runs through the working chamber. The pistons are mounted to slide in a piston cage, which is located in the housing, is concentric with the rotational axis, and rotates together with the pistons about said axis. The gas exchange opening is arranged eccentrically in relation to the rotational axis, on one end face of the housing.

Abstract: A gear set is disclosed having a guide, such as a cam, engaging the output shaft of the gear shaft and being indexed thereby. The guide drives one or more followers which in turn drive one or more interfaces of a differential gear set. The output shaft may be driven by a third interface of the differential gear set. The followers may likewise engage piston assemblies in order to control the piston assemblies during execution of a process such as a four stroke combustion process, or other process involving compression or expansion of a gas. The piston assemblies are enclosed within a housing defining an annular chamber, such as a toroid. Apertures formed in the housing allow exhaust gases to leave and air to be taken in. In one embodiment, a hyper expansion port is formed in the housing to release a portion of the air during the compression stroke in order to decrease the pressure of combustion gases.

Abstract: A rotary-piston engine includes at least two rotary pistons, which are located in an essentially spherical housing and which rotate in common about a rotational axis running through the center of the housing, each of the rotary pistons comprising two pistons that are interconnected in a fixed manner, lie diametrically opposite the center of the housing and execute pivoting displacements back and forth in opposite directions about a pivoting axis running perpendicular to the rotational axis, during their rotation. To control the pivoting displacements, the engine is provided with loose spherical or ellipsoidal rotational bodies, which are rotatably mounted in the sliding surfaces of the pistons in respective guide sockets that are hemispherical or ellipsoidal and which engage in at least one guide groove that is configured in the housing. The groove has an essentially hemispherical or ellipsoidal profile.

Abstract: A reciprocating/rotary piston engine is described comprising a housing containing a pivotable rotor as well as a series of openings in which pistons move up and down. According to the invention, the rotor is made up of a rotary piston (25) presenting a series of active surfaces between its vertices (two, four, six . . . n active surfaces) corresponding to the number of rotary pistons and with corresponding active surfaces of the reciprocating pistons with alternately linkable chambers with a fuel supply, a carburation and an exhaust gas outlet.

Abstract: A powertrain for driving a motor vehicle includes an internal combustion engine including first and second rotors supported for rotation about an axis, a first epicyclic gear unit including a first component fixed against rotation, a first driving component, and a first driven component, a first power path alternately producing a first drive connection between the driven component and the first rotor, and opening said first drive connection, and a second power path producing a second drive connection between the driven component and the second rotor, and opening said second drive connection.

Abstract: This rotary internal combustion engine has two rotatable vane type pistons mounted for axial rotation in a sealed casing. In an exemplary cycle, one piston is released to rotate at or prior to initiating combustion in the combustion space between the two pistons, while the other remains fixed. As the free piston rotates around to the position where the fixed piston is located, it drives exhaust from a prior cycle out of an exhaust outlet and then compresses air towards the combustion space. The roles of the pistons are reversed on the next cycle. Two units may be operated in tandem so that the power stroke of one unit provides power to help finalize the cycle of the other. Hydrogen is used as a preferred fuel, and water preferably serves as a lubricant.

Abstract: A rotary apparatus with an enclosure formed by a hollow curved housing along with two sleeves, with two vanes within the enclosure, where one vane is fitted on each sleeve and the space within the enclosure is partitioned into two segregated volumes by the vanes which can rotate along with the sleeve that the individual vane is fitted on, by use of the timing devices, couplings, brakes and shaft, resulting in a sequence of alternate, independent or simultaneous rotation and stopping of vanes that leads to increase and decrease of volume of the segregated spaces, in a fashion that results in a thermodynamic gas cycles with Variable Compression ratio.

Abstract: An internal-combustion engine comprises an engine housing having a first wall delimiting a first combustion chamber, a first piston also delimiting said first combustion chamber and with a first piston head, a first crankshaft, a second piston also delimiting said first combustion chamber and with a second piston head, a second crankshaft, and a second connecting rod connected between said second piston and said second crankshaft, said first wail defining at least a section of a torus, said pistons being guided along a curved path defined by said section of a torus.

Abstract: A powertrain for driving a motor vehicle includes an internal combustion engine including first and second rotors supported for rotation about an axis, a first epicyclic gear unit including a first component fixed against rotation, a first driving component, and a first driven component, a first power path alternately producing a first drive connection between the driven component and the first rotor, and opening said first drive connection, and a second power path producing a second drive connection between the driven component and the second rotor, and opening said second drive connection.

Abstract: This invention provides a heat engine based on the well-developed structure of internal combustion engines. The heat engine comprises at least a piston and cylinder assembly and at least two heating chambers associated with said piston and cylinder assembly to provide a significantly increased time period for heat transfer from a heat source to the gaseous working of the engine without increasing the number of strokes per power stroke in a cycle. Each said heating chamber has therewithin a heat exchanger unit that facilitates heat transfer from the heating source to the working fluid, such as air, substantially under a constant volume, a port leading to said cylinder space, and a heating-chamber valve, said valve opening or closing the port to establish or block communication between said heating chamber and cylinder space.

Abstract: The invention concerns an internal-combustion engine, the engine comprising an engine housing having a combustion chamber and a piston travelling within the combustion chamber along a path of movement delimited between an upper dead center position and a lower dead center position. The engine housing comprises a first housing part and a second housing part, the first housing part and the second housing part delimiting portions of the combustion chamber, abutting each other, and defining a parting plane, the parting plane being arranged parallel to the path of movement of the piston.

Abstract: A circular column-shaped flywheel rotor 4 that rotates inside a rotor housing 1 in which a cylindrical-shaped hollow section is formed; a piston head 34 that is located on the flywheel rotor 4 so that it can come in sliding contact with the inner peripheral wall of the rotor housing 1 or be released from sliding contact; an intake valve 10 and airtight-sealing valve 21 that are constructed so that they are capable of partitioning and dividing a combustion chamber or opening up the combustion chamber; a spark plug 16; and an exhaust valve 28 that is located so that it is capable of connecting or disconnecting the combustion chamber with the outside; and whereby linking these components with the rotating movement of the piston head 34, performs air intake, compression, combustion expansion (explosion) and exhaust, to obtain rotational power output from the output shaft 6 that supports the flywheel rotor 4.

Abstract: An oscillating-piston machine comprises a housing, in which a first and at least a second piston are arranged, which pistons can together revolve in the housing about an axis of rotation that is fixed with respect to the housing, and which pistons, as they revolve about the axis of rotation, execute oppositely directed reciprocating pivoting movements about a pivot axis running perpendicular to the axis of rotation and through the centre of the housing, the first piston having a first end face, and the at least second piston having a second end face facing the first end face, the end faces delimiting a working chamber, characterized in that the pistons are arranged in such a way that the axis of rotation runs through the working chamber.

Abstract: The invention can be used for transport means, sports cars and power plants. The inventive engine comprises a hollow toroidal working cylinder provided with a continuous circular slot embodied along the small diameter thereof, a nozzle or a spark plug and arc-wise extended input and output orifices embodied in the wall thereof for admitting air or air-fuel mixture and exhausting combustion gases. The transmission gear is provided with four eccentrics whose crankshaft necks are fixed to the axial holes of the pinions and arranged in the four bores of a fly wheel, whose axes are circumferentially disposed at an even pitch. The crankshaft necks are connected to the bearing elements through connecting rods each of which is arranged by the ends thereof in such a way that they are rotatable about the crankshaft neck and an axis disposed in the wall of one of the bearing elements.

Abstract: A rotatably alternating air or water cooled two-stroke internal combustion engine comprising a cylindrical casing, and a rotor comprising two radially extending vanes affixed to a shaft rotatably mounted within the casing upon two end plates. Two longitudinally extending walls affixed to the casing. Sealing strips provided between said walls, the shaft, the vanes, the casing and the end plates respectively. The casing and/or the end plates equipped with plurality of ports which communicate with interior chambers formed between the vanes and the walls, allowing for intake of combustible air-fuel mixture and exhaust thereafter. Ignition means delivering a spark at the end of each working cycle. An extendable and adjustable connecting rod assembly converting the oscillating bi-directional rotary motion of the output shaft into a continuous unidirectional motion of the main shaft. A self lubricating mechanism incorporated into the engine.

Abstract: An internal combustion rotary engine includes a housing having an inlet and an outlet and a rotatable rotor centrally mounted within the housing. The rotor includes a plurality of pockets located about its circumference, the rotor further being connected to a rotor shaft. A rotatable elliptical body is disposed in each of the plurality of pockets. Each rotatable elliptical body is coupled to respective planet gears and each respective planet gear is meshed with a centrally disposed fixed sun gear. An ignition source is disposed in each of the plurality of pockets for igniting a fuel/air mixture. During operation of the internal combustion rotary engine, for each 360° rotation of the rotor, each elliptical body rotates through 720°.

Abstract: The rotary piston power system includes a housing having a drum and a cover rotatably mounted on the drum. The drum has high pressure and low pressure ports defined in its peripheral wall and a central separator wall having arcuate end faces and a pair of semicylindrical recesses defined in opposing sidewalls. A pair of pistons are rotatably mounted on axles on opposite sides of the separator wall and fit closely between the separator wall and the peripheral wall. Each piston has a plurality of radially disposed cylindrical recesses defining slots in the piston's peripheral wall. The cover has a plurality of radially disposed vanes extending into the drum defining a number of cylinders or chambers double the number of recesses defined in a single piston. An input/output shaft extends from the opposite side of the cover for coupling to a prime mover or to a load.

Abstract: A rotary internal combustion engine comprising at least one but preferably a plurality of two operating chambers each having a toroidal path of travel on an interior thereof and an interactive piston assembly comprising a pair of first or driven pistons connected to a power take-off and a pair of second or driving pistons concurrently movable along the toroidal path of travel relative to said pair of first pistons. In each chamber, the pair of second pistons is periodically positionable, during each revolution, in driving relation to the pair of first pistons and is cooperatively structured therewith to accomplish the various phases of an engine cycle during forced travel of the pair of first pistons along the toroidal path of travel, thereby causing forced rotation or driving of the power take-off.

Abstract: A balanced rotary cycling machine suitable for use as an internal combustion engine, compressed gas or steam engine, compressor or pump is disclosed herein. The rotor assembly consists of four articulating pistons where the opposite pistons are inter-linked with each other by pivoted rods comprising a parallelogram mechanism and therefore eliminating a need for pivots between pistons. The rotor assembly rotates inside or outside of a circular or non-circular stator depending on the configuration chosen. A variety of mechanisms for shape deformation of four piston assembly during its rotating cycle is also disclosed herein, as well as detailed descriptions of preferred embodiments, including a four cycle internal combustion engine with circular stator, marine engine with polymer parts and a four cycle automobile rotary engine with conventional oil pan. In addition, a method of operation of external rotary combustion engine, employing a high-pressure compressor and an external combustion chamber, is disclosed.

Abstract: The aim of the invention is to dispense with the disadvantages of previous engines either fully or partially. This is achieved by two cylindrical parts which rotate into each other, respectively possessing a wing and which can rotate about an axis of different speeds. Similar to a four-stroke engine, the following occurs: induction of an air-fuel mixture, compression until self-ignition, creation of a working stroke and discharge of combustion gases. The variable inlet and outlet opening times are controlled according to a control bushing and a special stepper motor. The rotating wings are controlled by freewheeling and by unilaterally acting hydrodynamic brakes or secured against reversed rotation. In relation to the cylinder core, two functional variable work chambers arise for each disk discharge elements, which were not possible with the previously rigid engine structure.

Abstract: A modular revolving cylinder engine including at least two interdependent flywheels driven in rotation by a driving device (1) that rotates them in synchronization and in opposite directions. Each flywheel includes a plurality of equally spaced hollow pushrods that are reciprocally movable along stroke lines that are parallel and offset with respect to the central axis of rotation thereof and through which combustion gases from associated combustion chambers pass outwardly of the flywheels. End portions of the opposing pushrods engage during each rotation of the opposing flywheels during which time the oppositely directed combustion gases passing through the pushrods impinge on the outer end portion of the opposite pushrod to thereby provide thrust to drive the opposing flywheel in rotation in opposite directions.

Abstract: An expansible chamber device includes a braking system with a set of cam surfaces on the piston assemblies and a set of movable members adapted to alternately engage first and second sets of cam surfaces to stop the rotation of first piston assembly while permitting second piston assembly to rotate freely. A pair of elongate pivotable members engage the piston assemblies on one end and engage a slidable member having an adjustable length on the other end. The slidable member and the pivotable members alternate between first and second positions in response to engagement with ramp and stop surfaces provided on the piston assemblies. The rotating piston synchronizing system includes a set of biasing springs to urge the pivotable members into a suitable position to permit the device to be started from an at rest condition. The adjustable length slidable member enables a variable compression ratio.

Abstract: An engine including a housing formed with a pair of side-by-side intersecting substantially cylindrical cavities, and a pair of counter-rotating power rotors rotatably mounted within the cavities. The pair of power rotors include intermeshing lobes that each define open ended combustion chambers.

Abstract: A computer controlled rotary piston engine includes a blower housing containing a rotatable impeller assembly, for pushing ambient air into the housing, and forcing the air to pass through a normally open valve mechanism into a combustion chamber. A plurality of fuel injectors are selectively operable for injecting fuel into the combustion chamber, followed by selective operation of at least one spark plug for igniting the fuel/air mixture, thereby causing the valve mechanism to close, and the combustion gases to pass through a plurality of spaced apart intake manifolds into always open input ports of a piston chamber for rotating a vaned or bladed rotary piston therein, followed by spent combustion gases being forced out of a plurality of spaced always open exhaust ports into an exhaust manifold. The distance the piston travels during a power cycle is adjustable, and inversely proportional to the frequency of combustion or number of combustion cycles within a given period of time.

Abstract: Two-cycle, single vane impeller, hinged hub rotary engines are simple embodiments of a new class of engines. The 2-cycle, hinged hub rotary engines have dependently rotating impellers with, interdigitated, alternating hub sections, a hinge like rotation joint. These 2-cycle engines have expansion and exhaust cycles. The intake and compression cycles are performed by a synergistic air compressor (fan or piston type). Fuel and oxidizer (e.g. compressed air, from a synergistic air compressor,) are injected, to create combustion mixtures, and spontaneously ignited to start the expansion cycle in the minimized expansion sector(s).

Abstract: Four-cycle rotary engines, with an even number of hinged-hub impeller vanes, utilize dependently rotating, joined, hinged-hub impellers, with interdigitated, alternating hub sections, on a shared, power output shaft, and electromagnetic fields, and timing of impeller release and capture, to provide real time compression ratio control, and to control the momentum of the rotating impellers, and mechanical clutches to transfer the rotation to the power shaft.

Abstract: A rotary engine assembly having a three dimensional and substantially cylindrical shaped outer casing. A plurality of pistons are mounted in circumferentially traversable fashion within the casing, each including a male feature extending from one end and a recess defined within an opposing piston end and within which the male feature seats at selected stages during a rotary combustion cycle associated with the pistons. A valve is operable with each of the pistons and in order to communicate, to the associated piston, at least one air intake port and exhaust port extending through the casings and communicable with the pistons during discrete stages of the combustion cycle. A plurality of ratchet plates are operably engaged to the pistons and traversable therewith, the ratchet plates engaging and actuating in rotary fashion a central crankshaft.

Abstract: A rotary vane motor uses a gear train arrangement for controlling the position of the vanes as well as the compression ratio of the motor. The motor includes a first pair of vanes namely a leading and trailing vane defining a working chamber therebetween and an opposed second pair of vanes namely a leading and trailing vane defining therebetween a second working chamber. Preferably the motor uses a pair of second order elliptical gears for controlling movement of the vanes to define an intake stage, a compression stage, an expansion stage, and an exhaust stage. In a preferred structure of the motor both the intake port and the exhaust port are movable to change or alter the intake stage and the exhaust stage respectively.

Abstract: Toroidal internal combustion engine comprising two concentric engine rings. Intake valves are assembled in two faces of one set of pistons and exhaust valves in two faces of the second set of pistons. The intake-valve pistons are fixedly attached to one of the engine rings and the exhaust-valve pistons to the other engine ring. The face of one intake-valve piston and the face of one adjacent exhaust-valve piston form boundaries of an engine chamber. Combustion forces on the piston faces force the two concentric engine rings to counter-rotate. The intake-valve piston and the adjacent exhaust-valve piston sweep the same chamber volume at different strokes of the engine cycle. The engine is constructed of CRC material and mounted on a central shaft, with the intake manifold and the exhaust manifold mounted on each side of the engine, providing a lightweight, self-lubricating, highly fuel efficient, and dynamically balanced engine.

Abstract: Two-cycle, single vane impeller, hinged hub rotary engines are simple embodiments of a new class of engines. The 2-cycle, hinged hub rotary engines have dependently rotating impellers with, interdigitated, alternating hub sections, a hinge like rotation joint. These 2-cycle engines have expansion and exhaust cycles. The intake and compression cycles are performed by a synergistic air compressor (fan or piston type). Fuel and oxidizer (e.g. compressed air, from a synergistic air compressor,) are injected, to create combustion mixtures, and spontaneously ignited to start the expansion cycle in the minimized expansion sector(s).

Abstract: Internal combustion engine and method in which pistons on different rotors move relative to each other to form chambers of variable volume in a toroidal cylinder. The pistons move in stepwise fashion, with the pistons on one rotor travelling a predetermined distance while the pistons on the other rotor remain substantially stationary. Fuel is drawn into a chamber as one of the pistons defining the chamber moves away from the other, and then compressed as the second piston moves toward the first. Combustion of the fuel drives the first piston away from the second, and the spent gases are then expelled from the chamber by the second piston moving again toward the first. An output shaft is connected to the rotors in such manner that the shaft rotates continuously while the rotors and pistons move in their stepwise fashion.

Abstract: A rotary engine is powered by pressure from gas or fluids. At least two pistons are positioned within a stator having an annular chamber. Pressure is provided between the pistons, which provides a force to push one piston relative to the other piston. One or more dogs control the travel of the pistons. Power is harvested from the pistons.