Abstract: Methods and systems are provided for a prechamber. In one example, a system includes a plurality of openings angularly arranged in a prechamber wall. The plurality of openings is oriented to receive and expel fluids in clockwise or counterclockwise directions.

Abstract: A rotary fluid machine has an inner rotor and an outer shell held by a stationary support structure, arranged so that sealing points on the inside of the shell interact in a sealing arrangement with the outer surface of the rotor to define working chambers, such that in use the relative motion of the rotor to the shell causes fluid to be moved through ducts in the rotor and rotor shaft, between the working chambers and a point where the rotor shaft interacts with the support structure.

Abstract: Embodiments include an electronic device, which contains circuitry configured to acquire charging parameters corresponding to a rechargeable battery of the electronic device. The circuitry is also configured to identify an operation state of one or more signal processing components of the electronic device, and estimate a first temperature profile for the electronic device based on an operation state of the one or more signal processing components. The circuitry is also configured to adjust, in multiple stages, a charging current of the rechargeable battery in response to the estimated first temperature profile and a threshold temperature for the electronic device.

Abstract: There is provided an apparatus for regulating a compression ratio of an HCCI rotary engine. The engine has a rotor piston rotatable in an operating direction. The stator has one or more combustion chamber throughways, each having at least first and second interior walls. The apparatus comprises, within each combustion chamber throughway, an expansion gate slidably received within the throughway and slidably engaged with and adjacent to the first interior wall, a combustion gate slidably engaged with and adjacent to the expansion gate in the operating direction, and a compression gate slidably engaged with and adjacent to both the combustion gate and the second interior wall, and disposed adjacent the combustion gate in the operating direction. Each gate is slidable longitudinally within the combustion chamber throughway. Rotation of the rotor piston, to a position where a lobe end of the piston aligns with a combustion gate, forms a combustion chamber.

Abstract: A rotary engine includes a casing having a first circular boring and a second circular boring smaller than the first circular boring. The first circular boring interconnects with the second circular boring. A piston rotor can move in a rotating manner within the first circular boring in the casing. A power head, ported to pass exhaust gases through a hollow center shaft, can move in a rotating manner within the second circular boring in the casing. The piston rotor and the power head can be coupled via a gear system to properly rotate during operation, with the piston rotor rotating counterclockwise and the power head rotating clockwise, or vice versa.

Abstract: The present invention relates to a heat engine having a housing. A generally triangular shaped rotor can drive an offset crank as it eccentrically rotates within the housing. Two inlets with valves and two exhausts are provided. The volume between each face of the rotor and the housing defines three expansion chambers. Six power cycles are provided (one by each expansion chamber times two inlets) per revolution of the rotor. Each valve controls the length of time that high pressure gas is allowed to enter each expansion chamber. The valves are controlled by a processor and close when enough pressure is supplied so that the pressures inside and outside the expansion chamber are equal when the chamber is fully expanded just prior to exhaust. Gates can provide a mechanical advantage to the rotor by reducing the amount of pressure applied to the back side of the fulcrum.

Abstract: An engine comprises a rotor disposed within a housing having a side wall, a top portion, and a bottom portion. The housing includes at least one energy burst ignition chamber and electrical device that introduces an electric charge into at least one energy burst ignition chamber. The rotor is constructed and arranged to spin within the housing by action of a force. At least one energy burst ignition chamber is constructed and arranged to electrically react with the gas disposed in at least one chamber such that the gas expands and drives the rotor. A control system is used for introducing electric charges into at least one energy burst ignition chamber at a controlled time interval.

Abstract: This invention is to provide a rotary internal combustion engine, which comprises a stationary cylinder connected with a shell, a plurality of piston claw clamps being movably provided on said stationary cylinder, a rotatable power output shaft pivotally provided on said shell, and an arc plate being fixed on said power output shaft within said shell, and a plurality of piston claw clamps being movably provided on a movable cylinder; wherein three pistons are rotating circumferentially in said movable cylinder and are clamped and released in turn cyclically by said piston claw clamps upon running, respectively, so as to switch working modes sequentially; and a plurality of spring cups are provided outside of said movable cylinder and each has a spring with a push rod provided therein such that said piston claw clamps can be controlled by said arc plate through said spring cups and said push rods.

Abstract: A rotary engine includes: a frame; a flywheel rotor having an axle rotatably mounted on the frame; a plurality of erectable pistons respectively mounted in an annular trough concentrically recessed in a rim of the flywheel rotor; and a cylinder block fastened on a housing secured to the frame and cooperatively forming an engine cylinder with the annular trough of the flywheel rotor, whereby each erectable piston is operatively erected beyond a cylinder head of the engine cylinder to dynamically define an instant combustion chamber among the cylinder head, the cylinder block, the piston and the annular trough of the rotor; and whereby upon combustion and explosion in the combustion chamber, the explosion gases will force and drive the erectable piston to rotate the flywheel rotor for outputting mechanical energy.

Abstract: A rotary engine an insert in one of the walls of the outer body having a pilot subchamber defined therein communicating with the internal cavity of the engine. An ignition element extends in an element cavity defined through the insert adjacent the subchamber. A portion of the element is in communication with the subchamber through a communication opening defined in the insert between the element cavity and the subchamber. The communication opening has a cross-section smaller than a corresponding cross-section of the portion of the element. An outer body for a rotary engine and a method of combusting fuel in a rotary engine are also provided.

Abstract: In one aspect, described is a rotary engine having a purge port located rearwardly of the inlet port and forwardly of the exhaust port along a direction of the revolutions of the rotor, the purge port being in communication with the exhaust port through each of the chambers along a respective portion of each revolution, and the inlet and outlet ports being relatively located such that a volumetric compression ratio of the engine is lower than a volumetric expansion ratio of the engine.

Abstract: A rotary piston engine is disclosed. In one aspect, the engine includes a rotary piston rotating in a housing. The engine also includes a piston flank wall extending at least between two apex edges adjacent on the circumferential wall of the piston. The engine further includes a combustion chamber formed between the piston flank wall, an inner circumferential wall of the housing, and inner side walls of the housing, wherein the spark plug is connected to the combustion chamber by at least one spark plug channel. The spark plug channel has a substantially circular, elliptical or slot-like formed cross-section and the spark plug is arranged in a spark plug cavity having a larger diameter than the spark plug channel. The volume of the spark plug cavity is arranged relatively to thee spark plug channel substantially at the rear side, seen in the direction of rotation.

Abstract: A split-cycle variable capacity rotary spark ignition engine system having at least a first rotary configuration (C1) including repetitively volume variable working chambers [60, 61, 62] for carrying out the combustion-expansion and exhaust phases and at least a second rotary configuration (C2) including repetitively volume variable working chambers (70, 71, 72) for carrying out the intake and compression phases of a four phase engine cycle. Dividing seal means (73, 74 of C1, 75, 76 of C2) for periodically dividing each of successive working chambers into a volume enlarging leading portion and a volume contracting trailing portion. Discharge valve means for varying compression chamber capacity through discharging fraction of trapped intake gas from compression chambers. A first phase altering arrangement is provided for varying the phase relation between the first rotary configuration (C1) and the second rotary configuration (C2).

Abstract: A rotary internal combustion diesel engine (46) comprising: a posterior plate (78), an intermediate plate (80), and an anterior plate (82); a rotor-housing unit (46) on each side of the intermediate plate (80), each containing a yousroid chamber (48), and a 2-apex rotor (56) containing an aperture (58). The chamber (48) wall contains an intake valve (68), an exhaust valve (70), and a fuel supply device (72); in gasoline embodiments, an ignition device (76) is added; compressed air/gas and hydraulic embodiments, require an input port (74) and an output port (70a). A shaft (52) rotatably mounted, extends through the housing, having essentially rectangular segments (54) within the chambers (48). There are seals (not shown) on the rotor apices (60, 62) and on the anterior (82) intermediate (80), and posterior plate (78).

Abstract: An internal combustion engine comprising a rotor comprising a block (2), a drive shaft (5) and at least one piston set (1), all of them jointly rotating, wherein said piston set (1) is radially located with respect to the drive shaft (5); and a stator comprising a carcass (21), a first and second rotating support means (18, 19), and a first and second attachment means (17, 23); wherein the carcass (21) has guides (6) on its internal surface, which delimit the trajectory of each piston set; and wherein the inner end of the piston set (1) comprises a piston head (15) located inside the block (2), delimiting a combustion chamber, while at its outer end said piston set (1) contacts the guides (6).

Abstract: An internal combustion engine having combustion chambers that rotate about a main shaft axis in a step-wise manner. A first and second rotors each have elongate pistons that are interdigitated so that when one rotor rotates with respect to the other rotor, some chambers between the interdigitated pistons are reduced in volume and other chambers are increased in volume. Respective one-way bearings connect the first and second rotors to the main shaft to incrementally rotate it. Fuel mixture and exhaust apparatus is connected to one end of the engine to feed a fuel mixture to the increasing-volume chambers and extract the exhaust from other decreasing-volume chambers. At the same time, yet other chambers are experiencing compression and ignition cycles. An oil pump is driven by the first and second rotors for circulating a lubricant from a reservoir, through the engine parts to be lubricated and then back to the reservoir to cool the lubricant.

Abstract: A combustible fluid-operated orbital engine having sets of cooperating cylinder and piston members with respective parallel axes of rotation. Respective cylinder and piston carrier wheels with respective axes of rotation parallel to the piston/cylinder axes of rotation carrying the pistons/cylinders circularly and orbitally and at all times in opposed relation on a common longitudinal axis along intersecting counter paths. Respective gearing structures or belts/sprockets supported by the cylinder and piston carrier wheels rotate the pistons/cylinders counter to their circular motion direction to maintain their opposed relation for their periodic interfittment when their respective paths intersect. A combustible fluid supply is provided to the cylinder member for combustion coincident with the periodic interfittment in engine operating relation. The pistons/cylinders may include ceramic material. The compression sealing system is located in the entry of each cylinder rather than being connected to the piston.

Abstract: A rotary internal combustion engine includes an outer housing and an inner housing and an enclosure defined therebetween. At least one of the outer and inner housings is rotatable relative to the other and at least two barriers are disposed in the enclosure and divide the enclosure into a combustion chamber and an exhaust chamber. At least one barrier is rotatable relative to at least one other barrier and at least one barrier comprises a retractable barrier mounted along a pivot axis and is pivotable between an extended position and a retracted position. An intake port, exhaust port, and ignition source are also provided. A method of combusting a fuel comprises rotating a drive member to expand a combustion chamber and substantially isolate the combustion chamber from an exhaust chamber, and introducing and combusting a combustion fluid and a fuel in the combustion chamber as the combustion chamber is expanding.

Abstract: A rotary engine for automobile, locomotive, airplanes, ships, vehicle or motorcycle is provided. The rotary engine comprises a rotor and at least one supporting member. The rotor rotates around an axis and has at least one chamber with a door selectively close the chamber; the supporting member approaches the rotor and has a first fuel inlet, a spark plug and a groove disposed sequentially along with the rotated direction of the rotor. The groove has an outlet connecting to exterior of the supporting member. Wherein the first fuel inlet allows fuel entering and approaching the chamber, and then the spark plug ignites the fuel of the chamber when the chamber and the groove are connected.

Abstract: A rotary engine includes a casing having a large circular boring, a small circular boring, whereby the small circular boring interconnects with the large circular boring. A piston rotor is carried in a rotating manner within the large circular boring in the casing. A power head, ported to pass exhaust gases thru it's hollow center shaft, is carried in a rotating manner within the small circular boring in the casing. The piston rotor and the power head are meshed together to properly rotate during operation, with the piston rotor rotating counterclockwise and the power head rotating clockwise. A second powerhead can also be used.

Abstract: The present invention relates to an improved rotary engine having one positive motion stroke, the rotary engine comprising at least one of a piston having at least one piston vane. At least one of a unidirectional bearing is operationally coupled to the piston, wherein the piston is configured to allow the piston vane to rotate and the unidirectional bearing prevents the piston vane from rotating during a combustive force or a thrust force injection. A peddle block is positioned in the pathway of the piston vane, wherein as the piston vane approaches the peddle block a secondary exhaust pressure increases against the piston vane surface, the secondary exhaust pressure, in part, causes the piston vane to rotate and self-align for a subsequent cycle. Other exemplary embodiments allow for a secondary exhaust pressure to rotate a piston vane causing the piston vane to self-aligning for the next cycle.

Abstract: A motor according to the invention includes a combustion chamber; a central rotor disposed within the combustion chamber; a shaft, which engages the rotor longitudinally and extends from the combustion chamber in opposite directions; and a proximal rotor and a distal rotor, which are coupled to the shaft in symmetrically opposite positions and have passages defined thereon to receive at least some of the exhaust gas exiting the combustion chamber and impart a vertical motion to that exhaust gas. After exiting the proximal and distal rotors, the exhaust gas is directed to an interspace between the shaft and a housing of the motor and forms pneumatic bearings between the shaft and the housing, which maintain the shaft in a frictionless suspended position during operation of the motor. In one embodiment, some of the exhaust gas energizes batteries disposed around the motor.

Abstract: A Revolving piston rotary annular cylinder rotary valve continuous flow and combustion expansible chamber devices, engine machine systems with an outer annular cylinder housing assembly having a central axis, having one or a plurality of balanced pistons attached to a rotor within of the outer housing whereby, a plurality of relatively air tight compartments are formed between the interior surface of the outer housing, the outer surface of the rotor and piston assembly with the volume of said compartment varying as a function of the rotative position of the inner cylinder and rotor piston assembly in relation to the rotary isolating valve connected at one end to the housing upstream before the intake port, another end of valve being in rotary contact with outer peripheral surface of piston and said rotor assembly having an inlet for receiving any fluid and an outlet for providing said fluid.

Abstract: A lightweight rotary engine is provided that comprises a structurally efficient, lightweight rotor housing. Disposed in the wall of the rotor housing is a combustion zone thermal barrier insert. The thermal barrier insert is comprised of a material with low thermal conductivity. The use of the insert allows the rotor housing to be constructed from higher strength material such as steel or titanium.

Abstract: The combination of a piston with an integrated spark plug to be used in an internal combustion engine is disclosed. The plug-in-piston configuration allows for maximum combustion and fuel efficiency as well as increased power output. Further, the configuration minimizes the release of unburned fuel and pollutants into the atmosphere. A method is also disclosed by which electrical energy is communicated to a spark plug.

Abstract: Engines and methods execute a high efficiency hybrid cycle, which is implemented in a volume within an engine. The cycle includes isochoric heat addition and over-expansion of the volume within the engine, wherein the volume is reduced in a compression portion of the cycle from a first quantity to a second quantity, the volume is held substantially constant at the second quantity during a heat addition portion of the cycle, and the volume is increased in an expansion portion of the cycle to a third quantity, the third quantity being larger than the first quantity.

Abstract: A rotary piston machine has a housing in which are arranged at least two pistons which are able to revolve together in the housing about an axis of rotation which is fixed with respect to the housing, the pistons being mounted slidingly in a piston cage which is mounted in the housing and revolves together with the pistons about the axis of rotation, the two pistons executing mutually opposing reciprocating motions while revolving about the axis of rotation in order alternately to increase and decrease the volume of a working chamber defined by end faces oriented towards one another of the two pistons and by the piston cage, the axis of rotation passing through the working chamber and the piston cage having a gas exchange opening for admitting and discharging gas to and from the working chamber.

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: The subject of the invention is a variable-volume rotary device with a housing (1) comprising an inner spherical cavity, inlet and exhaust ports and a bypass flow path. Within the housing (1) a rotary displacement member with spherical outer configurations capable of revolving around the center point of the spherical inner surface of the housing is mounted. Said rotary displacement member is equipped with a centrally disposed, disc-shaped partition (6) that forms a mutually isolated division in the spherical inner cavity of the housing (1) and has two pivot vanes (7, 8), splitting the housing cavity further into four isolated quadrants, the volume of which vary during gyration. Vanes (7, 8) are similar in shape to orange segments. Vanes (7, 8) are connected to opposing sides of and along the diameters of the central disc (6), and extend in mutually perpendicular planes, allowing for rotary movement.

Abstract: An engine is disclosed including at least one piston which is positioned within a toroidal piston chamber. A method of operating an engine is disclosed wherein a piston is advanced in a toroidal piston chamber past a first valve and the first valve is closed to form a first ignition chamber area located within the piston chamber between the first valve and the rear side of the piston. A second valve is closed ahead of the piston to form a first exhaust removal chamber area located within the piston chamber between the second valve and the front side of the piston, the exhaust removal chamber including exhaust gases from a preceding ignition which occurred in the first ignition chamber area. A fuel mixture is introduced into the first ignition chamber area and ignited thereby advancing the piston further along the toroidal piston chamber.

Abstract: A plastic case surrounds a primary winding of a multicharge ignition system, and has a rib in which the high voltage end is routed back to the low voltage end, so that the low and high voltage ends can be closely juxtaposed with each other while advantageously permitting the primary winding to have one and only one winding layer to reduce resistance and size. The rib of the case extends into the slot of the magnetic shields of the winding.

Abstract: An improvement structure of the rotary engine mainly includes three parts. One is that at least a combustion chamber and an outlet are set on the perimeter of a steam wheel/flywheel. Under the optimum condition, a propelling chamber is set additionally in the front of combustion; chamber, and a platform is elongated in the rear for lasting the thrust force then driving out the exhaust gas. There is an explosion per rotation, and it also can be designed to be multiple explosions per rotation. And, an explosion chamber is set on the slide block in the outer side of steam wheel/flywheel and supported on the frame through screws. Besides it is able to adjust the advanced sparking time of inletting, the rest strokes except of aforementioned combustion chamber are all set with protruding faces on top to block the inlet to prevent the entering of flammable gas.

Abstract: An internal combustion engine comprising at least one cylinder provided with at least one glow plug adapted to heat a variable volume combustion chamber within the cylinder, and an electronic control unit which in turn comprises an estimation module adapted to estimate the temperature of the glow plug within the combustion chamber and a control module which is adapted to drive the glow plug as a function of the estimated temperature.

Abstract: An internal combustion engine comprising a support structure, including a tube and a hollow stator core, supported by and rigidly affixed to the tube. Additionally, a rotor assembly is eccentrically and rotatably mounted about the stator core and having a pair of partial sidewalls, each of which defines a circular opening. A pair of shaft seals, in which each shaft seal is set into one of the circular openings and are rotatably mounted about the tube. The stator core, rotor and shaft seals together define multiple, separate sealed chambers that change volume as the rotor moves. Finally, ignition, intake and exhaust mechanisms are mounted internal to the hollow stator core.

Abstract: An internal combustion engine comprising a support structure, including a tube and a hollow stator core, supported by and rigidly affixed to the tube. Additionally, a rotor assembly is eccentrically and rotatably mounted about the stator core and having a pair of partial sidewalls, each of which defines a circular opening. A pair of shaft seals, in which each shaft seal is set into one of the circular openings and are rotatably mounted about the tube. The stator core, rotor and shaft seals together define multiple, separate sealed chambers that change volume as the rotor moves. Finally, ignition, intake and exhaust mechanisms are mounted internal to the hollow stator core.

Abstract: A fuel injection, ignition, and combustion system for use in a rotary internal combustion engine of the diesel type and method of power extraction is provided. The fuel combustion system includes a rotary engine with a prechamber disposed in a top center position of the engine housing. The prechamber includes means within the prechamber for maintaining a surface in the prechamber at a temperature sufficient to cause ignition of the fuel. In operation, unthrottled air is introduced into the housing and compressed in the top center position of the engine housing. Fuel is introduced into the prechamber via a fuel injector disposed within the prechamber which ignites due to the hot surface and initiates combustion. The engine continues to operate by retaining the surface of the prechamber at a high temperature which initiates subsequent combustion cycles.

Abstract: A rotary engine in which two rotors having interleaving radial vanes move with cyclic rotary motion superposed on uniform rotary motion inside a cylindrical cavity in a cooled engine housing. The rotor vanes divide the cylindrical cavity into four compartments in which intake, compression, explosion and exhaustion occur. The rotor motion is obtained by a gear and linkage system made up of an internal gear which rolls on a fixed external gear. The internal gear, having a pitch diameter of 3/2 the pitch diameter of the external gear, is contained in a moving housing that has crank pins that move in epicycloidal curves. Each crank pin is coupled to a crank on one of the rotors. Ignition timing is done by sensing the motion of the internal gear housing using magnetic means or optical means.

Abstract: An engine block mounts one or more rotors 16 within cylindrical rotor bores that are partially overlapped by cylindrical gate valve bores. A rotary gate valve is mounted within the gate valve bore and partially overlaps the rotating rotor. Angularly spaced lobes on the rotor are interspersed with angularly spaced flanges on the rotary gate valve. The lobes rotate within a groove that is closed off by movement of the flanges, thereby forming an expandable "combustion chamber" to propel the rotor about its axis. Incoming gases can be provided through and combusted within hollow portions of the rotor.

Abstract: In the concentric rotary pressure fluid machine which can either be an engine, motor, pump or compressor, the four identical elliptical gears (54, 54, 100, 100) actuate the relative rotary motions of two identical and coaxial rotors (60, 60') characterized by varying angular accelerations with respect to time equal in magnitude but opposite in direction. Consequently, the four arcuate variable-volume-chambers ( 1, 2, 3, 4) bounded by the arcuate rotor vanes (70, 70, 70', 70') analogous to opposed pistons of the piston-cylinder machine, and the rotor cylinders (80'), axial spacer (110), hollow cylindrical shell (20) and two transverse end plates (32, 32), functioning as cylinder block symmetrically and alternately enlarge and shrink in volumes in the prescribed manner as they revolve around their common axis.

Abstract: A vibration detecting apparatus including a vibration detector for detecting engine vibrations in a multi-rotor rotary piston engine. The vibration detector is disposed on an intermediate housing, on both sides of which working chambers of the multi-rotor piston engine are formed. The vibration detector is located so that it has a sensitivity to vibration in the direction substantially perpendicular to the side surface of the intermediate housing, and parallel to the axial direction of the eccentric shaft which carries the rotors. By the above arrangement of the vibration detector, the vibrations are precisely detected. In response to the detected vibrations, it is possible, for example, to control engine knocking.

Abstract: Ignition plug for a rotary piston engine comprises a central electrode, an insulator disposed around the central electrode and having an end surface which defines a creeping discharge surface, and an outer electrode provided on an outer conductor. The outer electrode is radially inwardly projecting with respect to the radially inner surface of the conductor and has an axially and radially inward edge which is spaced apart from the insulator to provide an air gap for spark discharge and located flush with or axially outwardly of the end surface of the insulator.

Abstract: An ignition plug is housed in a plug channel the cross-section of which reduces towards the end of the channel remote from the plug, and which terminates in an opening which is narrower in the direction of engine rotation. Burning efficiency is thereby enhanced, with effective constraint of harmful exhaust gas production.

Abstract: An ignition device for a rotary piston engine includes a glow plug which is mounted at an ignition port formed in an engine housing to communicate with a combustion and operation chamber and which, when electrically powered, is heated to red hot to ignite an air-fuel mixture in the combustion and operation chamber. The glow plug ignites the air-fuel mixture through a communicating port which is formed to face the combustion and operation chamber and which has a smaller aperture area than the cross-section area of the ignition port.

Abstract: An ignition device for rotary piston engines. The device has an ignition plug disposed in a bore formed in an inner wall surface of a casing of the engine. The plug is of the surface gap and air gap discharge type and has a discharge end constituted by inner and outer electrodes spaced apart from each other through a surface gap discharge distance defined by a surface of an insulative sleeve encircling the inner electrode and an air gap discharge distance defined between the insulative sleeve and the outer electrode. The surface gap discharge distance is not less than 0.6 mm and not greater than 1.3 mm. The air gap discharge distance is not less than 0.7 mm and not greater than 1.4 mm. The surface gap discharge distance is not greater than the air gap discharge distance. The outer electrode has a tip end axially retreated with respect to the surface of the insulative sleeve by a distance between 0.3-1.0 mm.

Abstract: An ignition system for rotary piston engine wherein a glow plug mounted in the epitrochoidal housing of the engine is supplied with electric power to maintain the surface temperature of the glow plug within a range from 900.degree. to 1100.degree. C. A control unit for controlling the supply of electric power to the glow plug produces an output pulse signal the pulse width thereof being varied depending on engine operating conditions such as the amount of fuel supply and engine rotational speeds. A power circuit receives the pulse signal from the control unit and on-off controls the supply of electric power to the plug from a battery.

Abstract: A method for manufacturing a housing casing for a rotary piston internal combustion engine, especially of trochoidal construction, as well as the housing casing made according to this method, whereby the housing casing consists of light metal whose internal running surface for the piston consists of a coating of hard material; the method thereby involves leaving during the machining of the inner wall of the housing casing a material island of such light metal about the discharge opening of the already bored or still to be bored spark-plug-firing channel, whose height corresponds at least to the thickness of the coating to be subsequently provided along the inner contour of the housing casing in the finish-machined condition; as a result thereof the area of the discharge opening of the firing channel is constituted exclusively of such light metal.

Abstract: A rotary engine having a pair of fuel injection nozzles disposed adjacent to and on opposite sides of a lobe junction of the rotor housing in the combustion region and a spark plug is disposed adjacent to the fuel nozzle which is disposed on the downstream side of said junction.

Abstract: A rotary piston engine whose two pistons each have one or more sectors of greater radial dimensions sealingly engaging inner walls of two cylindrical, intersecting cavities respectively receiving the pistons, and one or more sectors of smaller radial dimensions which engage the larger sectors in all angular positions of the piston and radially bound working chambers with the inner casing wall. The pistons are coupled for simultaneous rotation of equal angular velocity, and the working chambers expand and contract cyclically because they are circumferentially bounded by the larger piston sectors and by a sealing arrangement connecting the engaged piston portions. A compressor drivingly connected to one of the rotary pistons supplies compressed fluid to the working chamber when it is at its minimum volume, and explosion of the fluid expands the chamber and turns the piston.