Patent application number | Description | Published |
20090107223 | METHOD AND APPARATUS FOR TURBINE ENGINE DYANMIC CHARACTERIZATION - A method and apparatus for conducting dynamic characterization of a gas turbine engine which involves generating exciting pressure pulses and measuring responses in the engine, and, in one aspect then analyzing the measured response for engine dynamic characteristics. | 04-30-2009 |
20110188995 | AXIAL LOAD DAMPING SYSTEM FOR ROTOR SHAFT - A damping system for a gas turbine engine comprises a bearing mounted to a rotor shaft and a support connected to an outer race of the bearing. The support has a wall secured to a casing of the gas turbine engine at a connection portion. The wall has a first surface positioned against a surface of the casing with the first surface being in a non-parallel relation with the rotational axis of the rotor shaft. A cavity is defined in the first surface by a narrowing of a thickness of the wall. The cavity contains a damping fluid to dampen elastic deformation of the wall at the cavity resulting from axial oscillations of the rotor shaft. An abutment is provided to limit an amplitude of the elastic deformation of the wall. | 08-04-2011 |
20130025565 | MULTI-ROTOR ROTARY ENGINE ARCHITECTURE - A multi-rotor internal combustion engine has a plurality of rotary internal combustion units axially distributed along an engine axis. Each unit has a rotor mounted on an eccentric portion of the shaft inside a housing. The housings of adjacent rotary internal combustion units have different angular positions about the engine axis so as to angularly offset the housing from adjacent housings, which may provide for a more uniform temperature distribution around the housings and may also or instead allow optimising of the balancing of pressure induced side loads on the shaft of the rotors. | 01-31-2013 |
20130025566 | ROTARY INTERNAL COMBUSTION ENGINE WITH VARIABLE VOLUMETRIC COMPRESSION RATIO - A method and apparatus for controlling an air input in a rotary engine, including selectively controlling inlet ports communicating with an internal combustion cavity of the engine, the ports located serially downstream of the exhaust port. The inlet ports are controlled to alter air intake at various engine operational stages, such as start up, idle, etc., to allow for varying operational requirements to be met. For example: when a power demand on the engine is lower than a predetermined threshold, control may be effected by opening a primary inlet port and closing a secondary inlet port; and, when the power demand exceeds the predetermined threshold, control may be effected by opening the primary inlet port and opening the secondary inlet port, the secondary inlet port being in communication with the exhaust port throughout portions of the engine revolution to purge exhaust gases. | 01-31-2013 |
20130028768 | ROTARY INTERNAL COMBUSTION ENGINE WITH EXHAUST PURGE - 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. | 01-31-2013 |
20130028769 | APEX SEAL FOR ROTARY INTERNAL COMBUSTION ENGINE - In one aspect, there is described a rotor of a Wankel engine including a plurality of apex seal members each biased by a respective spring, each spring including an axial action portion and a radial action portion, the axial action portion including at least two radially extending band sections with adjacent ones of the band sections being connected by a fold, one of the band sections contacting a radially extending surface of the apex seal member and another of the band sections contacting a radially extending element of the rotor body, and the radial action portion forming a major part of a length of the spring, contacting an axially extending surface of the apex seal member in two spaced apart locations, and contacting the rotor body between the two spaced apart locations. | 01-31-2013 |
20130028775 | APEX SEAL ARRANGEMENT FOR ROTARY INTERNAL COMBUSTION ENGINE - In one aspect, described is a rotor for a Wankel engine comprising two circumferentially spaced apart apex seals at each of the apex portions with each apex seal protruding axially from both end faces, and each apex seal having a first biasing member biasing the apex seal radially outwardly away from the peripheral face of the body, and a second biasing member biasing the apex seal axially outwardly away from a respective one of the end faces, the two apex seals of a same one of the apex portions being biased by the respective second biasing member in opposite axial directions from one another. | 01-31-2013 |
20130028776 | APEX AND FACE SEALS WITH ROTARY INTERNAL COMBUSTION ENGINE - In one aspect, described is a rotor for a rotary internal combustion engine where a first face seal biased axially outwardly away from the first end face has opposed curled ends abutting a first seal element of a respective one of the adjacent apex seal assemblies, and a second face seal biased axially outwardly away from the second end face has opposed curled ends abutting a second seal element of a respective one of the adjacent apex seal assemblies. | 01-31-2013 |
20130028777 | GAS SEAL ARRANGEMENT FOR ROTARY INTERNAL COMBUSTION ENGINE - A rotor of a rotary internal combustion engine, with each of the end faces having at each of the apex portions a recess defined therein in communication with the at least one apex groove, an end seal received in the recess in sealing engagement with the apex seal of each of the at least one apex groove, a first seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a first one of the adjacent apex portions, and a second seal member in sealing engagement with the end seal and with the face seal of the face groove defined between the apex portion and a second one of the adjacent apex portions. | 01-31-2013 |
20130247866 | PORT FOR ROTARY INTERNAL COMBUSTION ENGINE - A Wankel engine with a peripheral wall of the stator body including a non-circular opening formed therethrough and defining at least part of a port. The opening has a perimeter defined by a first edge and remaining edges, with the remaining edges being located downstream of the first edge with respect to a direction of rotation of the rotor. The remaining edges extend non parallel to a longitudinal axis of the apex seals. | 09-26-2013 |
20140020380 | COMPOUND CYCLE ENGINE - A compound cycle engine having at least one rotary unit defining an internal combustion engine, a velocity turbine in proximity of each unit, and a turbocharger is discussed. The exhaust port of each rotary unit is in fluid communication with the flowpath of the velocity turbine upstream of its rotor. The rotors of the velocity turbine and of each rotary unit drive a common load. The outlet of the compressor of the turbocharger is in fluid communication with the inlet port of each rotary unit, and the inlet of the pressure turbine of the turbocharger is in fluid communication with the flowpath of the velocity turbine downstream of its rotor. A method of compounding at least one rotary engine is also discussed. | 01-23-2014 |
20140020381 | COMPOUND CYCLE ENGINE - A compound cycle engine having an output shaft; at least two rotary units each defining an internal combustion engine, a velocity turbine, and a turbocharger is discussed. The velocity turbine includes a rotor in driving engagement with the output shaft between two of the rotary units. The exhaust port of each rotary unit is in fluid communication with the flowpath of the velocity turbine upstream of its rotor. The outlet of the compressor of the turbocharger is in fluid communication with the inlet port of each rotary unit. The inlet of the pressure turbine of the turbocharger is in fluid communication with the flowpath of the velocity turbine downstream of its rotor. A method of compounding at least two rotary engines is also discussed. | 01-23-2014 |
20140245988 | ROTARY INTERNAL COMBUSTION ENGINE WITH PILOT SUBCHAMBER - A rotary engine with an outer body having an insert located in the peripheral offset from the rotor cavity such that a portion of the peripheral wall extends between the insert and the cavity. The insert has a pilot subchamber defined therein and the portion of the peripheral wall has at least one opening defined therethrough in communication with the at least one outlet opening of the insert and with the cavity. A method of combusting fuel into a rotary engine is also discussed. | 09-04-2014 |
20140251258 | SYSTEM FOR PILOT SUBCHAMBER TEMPERATURE CONTROL - 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. | 09-11-2014 |
20140261292 | INTERNAL COMBUSTION ENGINE WITH PORT COMMUNICATION - An internal combustion engine with rotatable bodies each received in a respective internal cavity. The engine includes at least one inlet port for each internal cavity in fluid communication with the combustion chamber(s) thereof at least during their intake phase and a beginning of their compression phase. The bodies are angularly offset with the beginning of the compression phase of the combustion chamber(s) defined by each body being simultaneous with at least a beginning of the intake phase of the combustion chamber(s) defined by a different one of the bodies. A respective conduit provides a fluid communication between an inlet port for each body and an inlet port for the different one of the bodies, with each conduit being in fluid communication with a plenum for receiving pressurized air. A method of feeding air to an internal combustion engine is also provided. | 09-18-2014 |
20140261293 | INTERNAL COMBUSTION ENGINE WITH PILOT AND MAIN INJECTION - 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. | 09-18-2014 |
20140261294 | INTERNAL COMBUSTION ENGINE WITH COMMON RAIL PILOT AND MAIN INJECTION - 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. | 09-18-2014 |
20150040855 | Rotary Internal Combustion Engine with Static Oil Seal - A stator for a rotary internal combustion engine, with a body having an internal cavity. Each end wall has a scavenging cavity defined therein in fluid communication with the internal cavity through a respective scavenging opening extending through the inner surface thereof, and at least one annular oil seal groove defined in the inner surface thereof concentric with the central bore and located radially outwardly of the scavenging opening. At least one annular oil seal is received in each groove and protrudes from the end wall into the internal cavity for sealing engagement with a surface of a rotor of the engine, each seal being biased axially away from the end wall. A rotary internal combustion engine and a method of limiting radially outwardly directed oil leaks in a rotary engine are also disclosed. | 02-12-2015 |
20150075483 | ROTARY INTERNAL COMBUSTION ENGINE WITH EXHAUST PURGE - 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. | 03-19-2015 |