Abstract: A method of combusting fuel, e.g. heavy fuel, in a rotary engine, including injecting a main quantity of fuel directly into a combustion chamber to form a first fuel-air mixture having a first air-fuel equivalence ratio ? higher than 1, injecting a pilot quantity of fuel into a pilot subchamber to form a second fuel-air mixture having a second air-fuel equivalence ratio ? smaller than the first air-fuel equivalence ratio, igniting the second fuel-air mixture within the pilot subchamber, using the ignited second fuel-air mixture from the pilot subchamber to ignite the first fuel-air mixture, and injecting a supplemental quantity of fuel directly into the combustion chamber after igniting the first fuel-air mixture, upstream of an exhaust port of the rotary engine with respect to a direction of rotation of the rotor. A rotary engine with interburner fuel injector is also discussed.

Abstract: A fuel injection system for an aircraft engine has: a first fuel injector having a first actuation inlet, a first fuel inlet connected to a fuel source, and a first fuel outlet connected to the at least one combustion chamber, the first fuel injector defining a first pressure ratio; a second fuel injector having a second actuation inlet, a second fuel inlet connected to the fuel source, and a second fuel outlet connected to the at least one combustion chamber, the second fuel injector defining a second pressure ratio; and an actuation fluid system having a circuit connected to the first actuation inlet and to the second actuation inlet, the first outlet pressure different than the second outlet pressure by having one or both of the first pressure ratio different than the second pressure ratio and a first actuation pressure different than a second actuation pressure.

Abstract: An internal combustion engine including an igniter disposed at least partially within an aperture defined in a housing of the engine, the igniter having a body including a tip supporting portion and having a tip extending from the tip supporting portion. A cooling sleeve is disposed around the tip supporting portion, and the cooling sleeve defines a path of heat transfer between the tip supporting portion and the housing. The engine may be a rotary engine. A method for cooling an igniter of an internal combustion engine is also discussed.

Abstract: There is described a system and method for controlling a temperature in the subchamber of a rotary engine. At least one first measurement of at least one engine operating parameter and a second measurement indicative of a present temperature in the subchamber are received. A setpoint for the temperature in the subchamber is computed from the at least one first measurement. In response to the second measurement, at least one control signal indicative of a request to adjust the present temperature towards the setpoint is generated and sent to the engine.

Abstract: A Wankel engine having an insert in the peripheral wall of the stator body, the insert being made of a material having a greater heat resistance than that of the peripheral wall, having a subchamber defined therein and having an inner surface bordering the cavity, the subchamber communicating with the cavity through at least one opening defined in the inner surface and having a shape forming a reduced cross-section adjacent the opening, a pilot fuel injector having a tip received in the subchamber, an ignition element having a tip received in the subchamber, and a main fuel injector extending through the housing and having a tip communicating with the cavity at a location spaced apart from the insert.

Abstract: An internal combustion engine including a pilot subchamber, a pilot fuel injector having a tip in communication with the pilot subchamber, an ignition element positioned to ignite fuel within the pilot subchamber, and a main fuel injector spaced apart from the pilot fuel injector. The engine includes a common rail in fluid communication with the main fuel injector and with the pilot fuel injector and a pressure regulating mechanism in fluid communication with the common rail for regulating a fuel pressure therein. A method of combusting fuel in an internal combustion engine is also provided.

Abstract: An internal combustion engine with at least two rotatable bodies each defining at least one combustion chamber of variable volume and, for each rotatable body: a pilot subchamber, a pilot fuel injector having a tip in communication with the pilot subchamber, an ignition element positioned to ignite fuel within the pilot subchamber, and a main fuel injector spaced apart from the pilot fuel injector. The engine includes a common first fuel conduit in fluid communication with each main fuel injector, and a common second fuel conduit in fluid communication with each pilot fuel injector. First and second pressure regulating mechanisms which are settable at different pressure values from one another respectively regulate a fuel pressure in the first and second conduits. A method of combusting fuel in an internal combustion engine is also provided.

Abstract: A fuel pump has a pump chamber accommodating a rotor member. The rotor member is rotatable to supply fuel to from a tank to an exterior of the tank. A case is supported in the tank. The case accommodates a part of the fuel pump. A pump bracket is located in the tank. The pump bracket is in a tubular bottomed shape having a sidewall portion in which a remaining portion of the fuel pump is inserted such that the sidewall portion surrounds a radially outside of the pump chamber of the remaining portion. The pump bracket is joined with the case to define a gap therebetween in a radial direction of the rotor member such that the pump bracket is movable relative to the case.

Abstract: A Wankel engine system having an insert in the peripheral wall of the rotor body, the insert being made of a material having a greater heat resistance than that of the peripheral wall, having a subchamber defined therein and having an inner surface bordering the cavity, the subchamber communicating with the cavity through at least one opening defined in the inner surface and having a shape forming a reduced cross-section adjacent the opening, a pilot fuel injector having a tip received in the subchamber, an ignition element having a tip received in the subchamber, and a main fuel injector extending through the housing and having a tip communicating with the cavity at a location spaced apart from the insert.

Abstract: An internal combustion engine having at least one working chamber limited by a piston and means for fuel injection, wherein said fuel injection means are arranged in a separate ignition chamber communicating with said working chamber, and means for tuning said ignition chamber and fuel injected by said fuel injection means such that substantially only burnt, expanding combustion gas enters 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 invention relates to a spark-ignition engine with a highly structural compression ratio greater than 15:1, throttle regulation, externally supplied ignition and with direct fuel injection into a precombustion chamber, which is connected to the main combustion chamber via an overflow channel. The fuel is injected into the precombustion chamber during the compression stroke and is ignited by a spark plug located in a manner that is as central as possible. The invention relates to a spark-ignition engine with a highly structural compression ratio greater than 15:1, throttle regulation, externally supplied ignition and with direct fuel injection into a precombustion chamber, which is connected to the main combustion chamber via an overflow channel. The fuel is injected into the precombustion chamber during the compression stroke and is ignited by a spark plug located in a manner that is as central as possible.

Abstract: The present invention provides an internal combustion engine and a method of manufacturing the internal combustion engine. The internal combustion engine comprises a housing, a first rotor, first and second impellers and a compression cam. In a preferred embodiment, the housing has a first inner surface defining a first cavity therein, the first rotor is journalled for rotation within the first cavity and is situated to define compression and exhaust cavities on opposing sides therein, first and second impellers located in, and slidable with respect to, first and second opposing radial apertures in the first rotor, and the compression cam is fixedly coupled to the housing. The compression cam has a working surface portion that corresponds to a profile of the inner surface to force the first and second impellers to contact the inner surface and a dead surface portion that departs from the profile to allow the first and second impellers to withdraw from the inner surface.

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 having an outer rotor on outer rotor bearings and an inner rotor within the outer rotor mounted on inner rotor bearings, the outer rotor axis being offset relative to the inner rotor axis, a housing enclosing the inner and outer rotors, generally radial arms formed on the inner rotor, and recesses defined between them, inwardly projecting lobes defined by the outer rotor, spaced apart, and defining outer rotor chambers, the inner rotor arms extending into the outer rotor chambers, at least around a portion of the rotational path of the rotors, a fresh air intake port for inducting fresh air into the outer rotor chambers in sequence at a predetermined point in the rotational path of the outer rotor, a fuel/air intake port for inducting burning fuel/air into the outer rotor chambers in sequence at a second predetermined point, and an exhaust port for exhausting gases from the outer rotor chambers in sequence at a third predetermined point.

Abstract: A fuel vaporizer chamber that is interconnected with a conventional combustion chamber through a valve. The valve allows hot combustion products to enter the chamber during the expansion stroke and is closed to trap the products therein. Fuel is then injected into the chamber and vaporized. The valve is opened to release the vaporized fuel mixture into the combustion chamber during the subsequent compression stroke. The charge is then ignited and the cycle is repeated.

Abstract: An apparatus and method for improving the combustion process of an internal combustion engine is disclosed. A prechamber containing a combustible mixture is designed to generate a torch emanating therefrom upon ignition; the torch is controlled to extend and penetrate deeply into the main combustion at a predetermined orientation without contact with the chamber walls. The swirling flame front of the sustained torch produces superior mixing with the unburned combustible mixture in the main combustion, particularly of a rotary engine. The prechamber is located outside the epitrochoid chamber of the rotary engine; in a nonstratified charge mode of this invention, the prechamber serves to receive a portion of the main chamber inducted charge during the compression cycle, which may be lean and difficult to ignite in the main chamber. In the prechamber, concentrated hot walls and a localized spark facilitate ready ignition, which in turn permits generation of a torch therefrom.

Abstract: An apparatus and method for improving the combustion process of an internal combustion engine is disclosed. A prechamber containing a combustible mixture is designed to generate a torch eminating therefrom upon ignition; the torch is controlled to extend and penetrate deeply into the main combustion at a predetermined orientation without contact with the chamber walls. The swirling flame front of the sustained torch produces superior mixing with the unburned combustible mixture in the main combustion, particularly of a rotary engine. The prechamber is located outside the epitrochoid chamber of the rotary engine; in a nonstratified charge mode of this invention, the prechamber serves to receive a portion of the main chamber inducted charge during the compression cycle, which may lean and difficult to ignite in the main chamber. In the prechamber, concentrated hot walls and a localized spark facilitate ready ignition, which in turn permits generation of a torch therefrom.

Abstract: A rotary piston internal combustion engine of the Wankel type for reducing unburned detrimental components such as NOx, HC, CO, etc. in exhaust gas without decrease of engine performance which comprises a first combustion chamber communicating by means of a passage means with a second combustion chamber formed between a trochoidal inner peripheral surface of a housing and a side surface of a rotary piston, said first combustion chamber being formed radially outside of said trochoidal inner peripheral surface, the volume of said first combustion chamber being 35 to 65% of the sum of both said combustion chambers at the top dead center (T.D.C.) of the engine, a fuel injection nozzle and an ignition plug provided in said first combustion chamber, said passage means opening onto said trochoidal inner peripheral surface in the range of 15.degree. before the junction of the two arcuate portions of said trochoidal inner surface to 30.degree.

Abstract: An internal combustion engine including a housing defining a combustion chamber, a piston movable within the housing, a port in the housing opening into the combustion chamber, a tube within the port having a free end terminating within the port closely adjacent the combustion chamber and an insulator on the exterior of the tube whereby heat flow from the tube to the housing is minimized to preclude thermal distortion thereof in the vicinity of the port.

Abstract: An apparatus and method for improving the combustion process of an internal combustion engine is disclosed. A prechamber containing a combustible mixture is designed to generate a torch eminating therefrom upon ignition; the torch is controlled to extend and penetrate deeply into the main combustion at a predetermined orientation without contact with the chamber walls. The swirling flame front of the sustained torch produces superior mixing with the unburned combustible mixture in the main combustion, particularly of a rotary engine. The prechamber is located outside the epitrochoid chamber of the rotary engine; in a nonstratified charge mode of this invention, the prechamber serves to receive a portion of the main chamber inducted charge during the compression cycle, which may lean and difficult to ignite in the main chamber. In the prechamber, concentrated hot walls and a localized spark facilitate ready ignition, which in turn permits generation of a torch therefrom.