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 cleaning method for a flame detector of a gas turbine activating combustor, comprising branching control air for forcing a spark plug of an ignition system into the gas turbine activating combustor, and blowing the branched control air against the respective inner surfaces of light sensor glasses of a flame detector, thereby blowing off dust or soot from the glass.

Abstract: An internal combustion engine has at least one outlet passage for exhausting the burned gases, terminating at the exterior surface of the engine, and, alternatively, connectable to the afterburning device or to a by-pass line by-passing the afterburning device. A control regulated as a function of temperature is provided to direct the burned gases through the by-pass line at high temperature and through the afterburning device at low temperature.

Abstract: Exhaust gas recycling means by which exhaust gas is recycled and introduced, via a port which is formed in the peripheral wall of a rotary piston engine and which port may also serve for introduction of air or an air-fuel mixture required for low-speed operation of the engine, into a leading zone of an intake chamber. Since the port formed in the peripheral wall is so disposed that the air or air-fuel mixture introduced therethrough tend to be stratified at the leading zone of the intake chamber, the recycled exhaust gas also tends to be stratified at the same leading zone so that the recycled exhaust gas tends to exist in vicinity of the spark plug, whereby less exhaust gas is required to be recycled since a given amount of exhaust gas is more effective in preventing production of nitrogen oxides, and there is correspondingly less engine wear and attendant production of hydrocarbons or similar compounds.

Abstract: A rotary internal combustion engine is disclosed herein and includes two confronting but spaced apart side casings which comprise part of the overall engine housing and a rotor located between the side casings, mounted around a rotatable shaft and extending between the casings. The engine disclosed herein has a number of improved features including improved sealing vanes which cooperate with the rotor and side casings to define various function chambers in the engine. The engine also includes more efficient combustion chambers including improved check valve mechanisms for introducing fuel into the combustion chambers. The engine also provides greater power generation due to an improved angle of combustion onto the lobes of the rotor.

Abstract: A rotary piston engine comprises a housing having a trochoidal peripheral wall and side walls on both sides thereof, a rotor adapted to perform a planetary rotary motion along the inner surface of the peripheral wall, and intake and exhaust ports formed in the housing. The engine performs intake, compression, combustion and exhaust strokes of a working fluid in accordance with the planetary rotary motion of the rotor. An air injection port is formed in the peripheral wall of the housing between the exhaust port and a portion of the minor axis of the trochoidal curve, being adapted to communicate with the intake chamber formed between the peripheral wall and the rotor.

Abstract: A rotary combustion engine is provided with an exhaust gas recirculation system that is responsive to both exhaust gas pressure and inlet vacuum and is operable to connect the working chambers adjacent their trailing end to the intake port through a variable size opening only when the chambers are nearing the end of the exhaust phase so that the differential between the pressure of the exhaust gases and the inlet mixture causes exhaust gases rich in unburned hydrocarbons in the trailing region of the chambers during the exhaust phase to flow at a rate increasing with decreasing inlet vacuum to the inlet port and thereafter be recirculated through the intake, compression and expansion phases.

Abstract: A device heats the fuel-air mixture by means of the exhaust in an internal combustion engine having an intake for the fuel-air mixture and an exhaust gas line, with a portion of the intake and a portion of the exhaust line having a common wall for heat transfer.

Abstract: A housing defining a flow passage therethrough including inlet and outlet ends as well as a central portion intermediate the inlet and outlet ends is provided. Positive displacement gas pump structure in the form of a roots-type compressor is operatively associated with the inlet end of the passage for pumping air under pressure therethrough and into the central portion between the inlet and outlet ends which defines a combustion chamber. The roots-type compressor or pump also defines an obstruction to the reverse flow of gas under pressure from the combustion chamber outwardly of the inlet end of the passage. A positive displacement gas motor in the form of a roots-type fluid motor is operatively associated with the outlet end of the passage for developing rotary torque in response to elevated gas pressures within the combustion chamber and the passage of gas under elevated pressures from the combustion chamber, through the roots-type motor and out the outlet of the passage.

Abstract: A rotary combustion engine having a planetary rotor and a side intake port is provided with an internal exhaust gas recirculation system that is operable to connect the trailing region of the working chambers and the space below the trailing apex seal to the annular space between the side seals and oil seals on one rotor side only when the chambers near the end of the exhaust phase whereby the differential between the pressure of the exhaust gases and the vacuum of the inlet mixture causes the exhaust gases rich in unburned hydrocarbon that are in the trailing regions of the chamber during the exhaust phase to flow through the annular space to the intake port and thereafter be recirculated through the compression and expansion phase.

Abstract: A compound supercharged rotary piston engine device in which a rotary piston compressor is interposed between a pair of rotary piston engines to form a unit. A single shaft extends through the unit and has coaxial eccentrics for the engines and an eccentric displaced 180.degree. therefrom for the compressor. The compressor supplies primary combustion air to the engines and also supplies air thereto for afterburning uncombusted fuel entrained in the exhaust gases of the engines. The air supply from the compressor to the engines takes place in a set of passages in the walls which separate the compressor from the engines and the passages are under the control of the pistons of the device.

Abstract: An internal combustion rotary engine oxidizing fluid injection arrangement having a sheet metal liner that is mounted in the engine's exhaust passage and has injection ports through which oxidizing fluid is injected into the exhaust gas in directions transverse to the flow thereof.

Abstract: A rotary piston engine comprises a housing having a trochoidal peripheral wall and side walls on both sides thereof, a rotor adapted to perform a planetary rotary motion along the inner surface of the peripheral wall and intake and exhaust ports formed in the housing. The engine performs intake, compression, combustion and exhaust of a working fluid by means of the planetary rotary motion of the rotor. An air injection port is formed in the peripheral wall of the housing between the exhaust port and a portion of the peripheral wall through which the minor axis of the trochoidal curve extends.

Abstract: A rotary internal combustion engine comprising in combination rotary air compressor and rotary power sections having cylindrical chambers having rotatably mounted internal to each chamber a movable vane rotor assembly.Each movable vane rotor assembly comprises a hollow cylindrical rotor having a movable vane assembly therein having a plurality of three or more vane pivotably connected to a floating vane shaft, said vanes being in sealable abutment with internal surfaces of said cylindrical chambers exterior to said rotor. Consecutive compartments are defined by adjacent vanes in combination with inner chamber and outer rotor and vane surfaces. Compressor and power rotors are connected to common shafts which extend through cover plates which partially enclose the compressor and power chambers.

Abstract: A clamp arrangement clamping a thermal reactor to a rotary engine comprising a clamp member that is first connected by spherically seating fasteners to the engine so as to pivot to receive the reactor which then makes these fasteners inaccessible and wherein additional fasteners are then employed at readily accessible locations to apply distributed load on the clamp member to tightly clamp the reactor to the engine.

Abstract: A method of programming exhaust gas constituents is disclosed which cooperates with a unique exhaust passage liner construction resulting in an improved self-cleaning technique for internal combustion engines. The liner comprises an apparatus which preferably subdivides the outer peripheral region of the exhaust so that the Reynolds number of the outer flow is below 2300 and therefore indicative of laminar or controlled turbulent flow. The laminar transient film between the passage wall and flow is enhanced by the transient film between subdividing walls and the flow, the composite acting to reduce the heat transfer coefficient between the total flow and wall of the exhaust passage.

Abstract: A rotary piston four-stroke internal combustion engine of trochoid type includes a housing composed of a shell and two parallel end parts together bounding an inner chamber in which a polygonal position is rotatably mounted. Inlet and outlet passages are provided in the housing for supply of air or fresh gas and for ejection of burned gases, respectively. The inlet passage is connected with an intake duct and the outlet passage with an exhaust gas reactor. A line containing a valve leads from the region of the inner chamber in which compression takes place to the exhaust gas reactor.

Abstract: In a rotary piston type engine comprising a rotor housing having exhaust port means, exhaust gas cleaning means comprising an auxiliary exhaust passage in the form of a cutout portion, and a secondary air port opening in a casing at the cutout portion. The cutout portion extends from the exhaust port means into a working chamber which is in the final part of expansion stroke.