Abstract: An assembly of at least two members. One of the members supports the other member, the assembly defining an axial direction, a radial direction, and a circumferential direction, an inner member of the at least two members being received radially inside an outer member of the at least two members, wherein the inner member and the outer member am attached to each other by a support arrangement, the support arrangement including at least one floating support assembly as a displaceable coupling between an inner member support point provided at the inner member and an outer member support point provided at the outer member. A displacement of support points in a radial direction results in an interrelated relative displacement of the support points in an axial direction end vice versa.

Abstract: A system includes a turbine housing, a turbine mount disposed in the turbine housing, and a turbine moving machine disposed at least partially within the turbine housing. The turbine moving machine includes a turbine support configured to couple to a turbine and a first translational portion coupled to the turbine support. The turbine moving machine is configured to move the turbine lengthwise along the first translational portion between a first turbine position within the turbine housing and a second turbine position outside of the turbine housing. The turbine moving machine includes a vertical adjustment assembly configured to raise and lower the turbine.

Abstract: Three-way valve with a valve housing and a closing body arranged in a longitudinally movable manner in the valve housing. An inlet channel, a first outlet channel and a second outlet channel are formed in the valve housing. The closing body interacts by longitudinal movement with a first valve seat formed in the valve housing and thereby opens and closes a first hydraulic connection between the inlet channel and the first outlet channel. Furthermore, the closing body interacts by longitudinal movement with a second valve seat formed in the valve housing and thereby opens and closes a second hydraulic connection between the inlet channel and the second outlet channel. A throttle is formed in the second hydraulic connection.

Abstract: The present invention concerns a method of utilising the waste heat contained in the exhaust gas of an internal combustion engine, comprising a turbine (20). To provide an apparatus and a method of operating same which directly supplies additional drive energy which otherwise would be lost as waste heat, it is proposed according to the invention that the turbine is an inverse turbine connected downstream of the exhaust gas outlet of the internal combustion engine and comprising at the inlet side an expansion stage (23) and at the outlet side a subsequent compressor (21), wherein the expansion stage and the compressor of the inverse turbine are so designed that the downstream-disposed compressor of the inverse turbine generates at the outlet of the expansion stage (23) a reduced pressure (p1) below the ambient pressure (p0), wherein the outlet (2b) of the compressor (21) is at the level of the ambient pressure and the compressor of the inverse turbine is driven by the turbine.

Abstract: A heat recovery system for an engine having an exhaust nozzle whereby exhaust gas is expelled, the heat recovery system comprising a steam generator that supplies hot vaporized coolant to a turbine generator which creates electrical energy. The electrical energy is used to power air compressors that supply clean outside air to the passenger compartment of the aircraft.

Abstract: A rocker arm includes a roller, a support shaft coaxially mounted in the roller and having a first end portion and a second end portion, walls including at least a first wall and a second wall arranged along the rotation axis and opposite each other with having the roller therebetween, the first wall having a first through hole through which the first end portion is inserted and the second wall having a second through hole through which the second end portion is inserted, and plate portions including at least a first plate portion and a second plate portion arranged opposite each other with having the first wall, the second wall and the support shaft therebetween. The first plate portion is in contact with a first end surface of the first end portion and the second plate portion is in contact with a second end surface of the second end portion.

Abstract: A rocker arm includes a roller, a support shaft coaxially mounted in the roller, walls arranged along a rotation axis and having the roller therebetween and having through holes, respectively, through which end portions of the support shaft are inserted, and each of the walls having an inner surface opposite the roller, and holding members mounted in the respective walls. The holding member includes a tubular portion mounted in each through hole and disposed between an inner peripheral surface of the through hole and an outer surface of an end portion of the support shaft, a first stopper portion included at a first end of the tubular portion to be in contact with the inner surface of one of the walls, and a second stopper portion included at a second end of the tubular portion to be in contact with an end surface of one of the end portions.

Abstract: In a hydraulically-operated vane rotor equipped variable valve timing control device for an internal combustion engine, a fluid-communication control mechanism is configured to switch, after having started the engine, a communication hole from a communicated state to a fluid-communication restricted state prior to switching operation of a lock mechanism from a lock state in which rotary motion of a vane rotor relative to a housing is restricted to an unlock state in which rotary motion of the vane rotor relative to the housing is enabled. As a result of this configuration, it becomes possible to apply, after having started the engine, an appropriately controlled hydraulic pressure to all of vanes, with hydraulic pressure supplied to either all phase-retard chambers or all phase-advance chambers, thereby ensuring a good control responsiveness of the vane rotor.

Abstract: A variable valve mechanism includes a first cam and a second cam, a main arm that drives a valve when swinging, a first sub arm that swings when pressed by the first cam, a second sub arm that swings when pressed by the second cam, and a switch device. The switch device includes a first switch pin that moves between a first coupled position between the main arm and the first sub arm and a first uncoupled position, and a second switch pin that moves between a second coupled position between the main arm and the second sub arm and a second uncoupled position. Both switch pins are arranged so as to be displaced from each other in positions where these switch pins do not overlap at least during a base circle phase in which base circles of both cams act.

Abstract: A camshaft has a decompression device for an internal combustion engine, wherein a valve lifter is rotatably supported in a base circle of a cam, which can be brought into operative connection with a gas exchange valve via rotation. The valve lifter is operatively connected to a centrifugal fly weight, which is arranged coaxially to the camshaft and which is rotatably supported, in such a way that the valve lifter forms a contour of the base circle in the region of action with the gas exchange valve from a certain rotational speed of the camshaft. The camshaft has a cavity in the region of the centrifugal fly weight, to which cavity lubricant pressure can be applied. A radial first bore from the cavity to the centrifugal fly weight is arranged in the camshaft. A slideable element that can be displaced by the lubricant pressure is arranged in the first bore. By way of the design of the camshaft, an unstable centrifugal fly weight is stabilized and thus acoustics are improved.

Abstract: An exchangeable filter of a treatment device has a housing with a housing pot and a housing cover connected to the open side of the housing pot. The exchangeable filter is connectable to a connecting head of the treatment device with a bayonet-type connecting device. The connecting device has a housing connecting part on the housing interacting with a head connecting part of the connecting head for connecting the connecting device. The housing has an inlet for a fluid to be treated connectable to a supply conduit of the treatment head and an outlet for the treated fluid connectable to a discharge conduit of the treatment head. The housing pot has a rim at the open side of the housing pot. The rim radially outwardly surrounds the housing connecting part and axially projects past the housing connecting part in a direction away from the housing bottom.

Abstract: A system for protecting an engine from damage due to vibration while the engine is not operating is provided. The system includes an engine having a crankshaft, at least one piston, at least one bearing, a lubricating fluid source, and a fluid pump associated therewith and a controller operationally connected to and configured to control the fluid pump. When the system is in a first mode, the controller is configured to control the fluid pump in a duty cycle to maintain a predetermined minimum fluid pressure of the lubricating fluid such that a lubricating fluid film is present between the at least one bearing and the crankshaft while the engine is not operating.

Abstract: A disclosed microwave heating apparatus includes a casing part configured to accommodate an object to be heated; a microwave generator configured to generate a microwave; an electromagnetic wave generator configured to generate an electromagnetic wave whose frequency is different from that of the microwave; an electromagnetic wave sensor configured to measure power of the electromagnetic wave, the power of the electromagnetic wave being measured after the electromagnetic wave incident on the casing part from the electromagnetic wave generator has passed through the object to be heated; and a controller configured to control, based on the power measured in the electromagnetic wave sensor, the microwave generator to generate the microwave.

Abstract: A two-stage venturi cooler comprises a first tubular conduit having a longitudinal axis, the first elongate tubular conduit having an exhaust gas inlet at one end, a mixed gas outlet at an opposing end, and a cooling gas inlet, wherein structures inside the first stage define a venturi that forms a column of mixed gas, wherein the column of mixed gas comprises a ring of exhaust gas surrounding a core of cooling gas; and a second tubular conduit that is coaxial with the first tubular conduit, wherein the second tubular conduit has a mixed gas inlet at one end and a mixed gas outlet at an opposing end, and wherein the mixed gas inlet is to receive the column of mixed gas and to surround the column of mixed gas with an entrained column of ambient air.

Abstract: An emission control system for an engine is described herein. The emission control system includes a reductant injector extending into an exhaust conduit upstream of a catalyst, the reductant injector including a reductant passage receiving reductant from a reductant reservoir and a first exhaust gas inlet receiving exhaust gas from the exhaust conduit, a boundary of the first exhaust gas inlet at least partially delineated by an inlet wall extending into an interior exhaust passage from an outer housing surface, the interior exhaust passage adjacent to the reductant passage and receiving exhaust gas from the first exhaust gas inlet and fluidly separated from the reductant passage.

Abstract: During execution of a first purification process of fluctuating a hydrocarbon concentration in exhaust gas flowing into a first catalyst with an amplitude within a prescribed range at a time interval within a prescribed range, when a switch request to a second purification process of purifying NOx in a second catalyst by adding urea water into the exhaust gas is generated, the switch to the second purification process is prohibited on the condition that a current NOx purification rate (a first purification rate R1) is higher than a purification rate (a second purification rate R2) on the assumption that the second purification process is executed, and an HC poisoning recovery stand-by process of reducing an additive amount of hydrocarbon per once in the first purification process is executed so as to reduce a slip amount of hydrocarbon into the downstream of the first catalyst.

Abstract: A system includes a gas turbine engine that may combust a fuel to generate power and an exhaust gas, an exhaust gas path in fluid communication with the gas turbine engine and that may receive the exhaust gas from the gas turbine engine, and a reductant skid fluidly coupled to the exhaust gas path. The reductant skid includes an injection system that may supply a reductant to the exhaust gas path. The system also includes a flow path separate from the exhaust gas path and fluidly coupling the gas turbine engine and the reductant skid. The first flow path may supply a first heated fluid to the reductant skid to aid in vaporization of the reductant.

Abstract: A fluid delivery system for an exhaust aftertreatment system may include an outer housing, a pump, a filter assembly, an electric heating blanket, and a heater retention plate. The heater retention plate is shaped to correspond to the shapes of the pump and filter assembly. A lid of the outer housing contacts the heater retention plate and clamps the heating blanket between the heater retention plate and the pump and filter assembly so that the heating blanket takes the shapes of portions of the pump and filter assembly. The outer housing includes mounting flanges and reinforcement members extending from corresponding mounting flanges to corresponding sidewalls of the outer housing and forming a hollow space therebetween. The filter assembly includes compensation elements that contract in response to expansion of fluid within a pump housing due to freezing and expand in response to thawing of the fluid.

Abstract: The present disclosure relates to an exhaust purification apparatus and a method of controlling the apparatus. The exhaust purification apparatus includes: an injector for injecting urea solution into an exhaust pipe; a driving unit to provide driving force for adjusting an injection angle of the injector; and a control unit to determine the injection angle of the injector based on values of a spatial velocity, flow rate, pressure and temperature of exhaust gas and to drive the driving unit so as to control the injection angle of the injector. In particular, the injection angle of the injector is adjusted by pivotal movement of the injector.

Abstract: An object of the present disclosure is to provide an exhaust gas purification catalyst demonstrating superior storage of NOx contained in exhaust gas. The exhaust gas purification catalyst of the present disclosure has a substrate, a first catalyst layer containing a catalytic metal for NOx reduction and a NOx storage material and formed on the substrate, and a second catalyst layer containing a catalytic metal for NOx oxidation and formed on the first catalyst layer. In the exhaust gas purification catalyst of the present disclosure, the value obtained by dividing the volume of all large pores having a pore volume of 1000 ?m3 or more by the total volume of all medium pores of having a pore volume of 10 ?m3 to 1000 ?m3 in the second catalyst layer is 2.44 or less.

Abstract: A pump for delivering a fluid includes: a pump housing having an inlet and an outlet, and having an inner circumferential face; a drive shaft; an eccentric inside the pump housing, the eccentric being eccentrically movable relative to the pump housing; a deformable element arranged in a pump gap between the inner circumferential face and an outer surface of the eccentric, the deformable element and the inner circumferential face defining a delivery channel. The deformable element is forced against the pump housing by the outer surface of the eccentric along at least a portion of the delivery channel such to form a sliding sealing of the delivery channel that can be slid along the delivery channel from the inlet to the outlet to deliver fluid by movement of the eccentric. A reinforcing ring has a coefficient of thermal expansion smaller than a coefficient of thermal expansion of the pump housing.

Abstract: An exhaust heat recovery device includes: a first pipe through which exhaust gas from an engine flows; a second pipe that communicates with the first pipe and bypasses the first pipe; a heat recovery unit that is disposed at an interior of the second pipe, and that exchanges heat between the exhaust gas and cooling water that circulates at an interior of the heat recovery unit, and that recovers heat of the exhaust gas; and a heat transfer suppressing mechanism that is provided at a portion connecting the first pipe with the second pipe, and that suppresses transfer of heat from the first pipe to the second pipe.

Abstract: An exhaust system for a diesel engine is provided. The exhaust system includes a component body with a surface, and a surface treatment disposed on some of the surface or all of the surface. The surface treatment is disposed so as to receive Diesel Exhaust Fluid (DEF) injected into the exhaust system during operation of the diesel engine. The surface treatment facilitates increased heat transfer to the received DEF to promote water evaporation and urea thermolysis of the received DEF.

Abstract: Methods and systems are provided for exhaust gas heat recovery at an exhaust gas heat exchanger. Exhaust gas may flow in both directions through an exhaust bypass passage and the heat exchanger coupled to the bypass passage. Hot or cold EGR may be delivered from the exhaust passage to the engine intake manifold and heat from the exhaust gas may be recovered at the heat exchanger.

Abstract: An engine diagnostic tool includes a diagnostic engine calibration module structured to include a plurality of diagnostic processes for operating an internal combustion engine system of an immobilized vehicle. One or more of the plurality of diagnostic processes are structured to be an intrusive diagnostic process for the internal combustion engine system, wherein the intrusive diagnostic process causes the internal combustion engine system to operate outside of one or more calibration parameters. The diagnostic engine module is further structured to control the order and timing of each diagnostic process in the plurality of diagnostic processes.

Abstract: A control system of an exhaust sensor controlling an exhaust sensor comprises a heater control part controlling a heater and a temperature estimating part estimating a temperature of an exhaust pipe around the exhaust sensor. The heater control part sets the target temperature to a first target temperature after startup of the internal combustion engine and until the estimated temperature of the exhaust pipe reaches a first exhaust pipe temperature, sets the target temperature to a second target temperature from when the estimated temperature of the exhaust pipe reaches the first exhaust pipe temperature to when it reaches a second exhaust pipe temperature, and sets the target temperature to an operating temperature of the electrochemical cell when the estimated temperature of the exhaust pipe reaches the second exhaust pipe temperature.

Abstract: A sealing device for an exhaust manifold includes a main pipe having a connection portion including a mounting groove formed at an interior circumferential surface; a sub pipe having a protruding portion at one end portion, the sub pipe being coupled to the main pipe in a state in which the protruding portion is inserted into the connection portion; a valve mounted at the mounting groove within the connection portion; and a gasket interposed between the protruding portion and the valve within the connection portion.

Abstract: The present invention relates to a cooling control apparatus which performs control for cooling an internal combustion engine by causing an electric pump to circulate cooling water and causing an electric fan to supply cooling air to a radiator. The cooling control apparatus comprises an electric pump for circulating a coolant through a coolant passage formed in the internal combustion engine, and a radiator and a radiator fan which are for cooling the coolant. When the internal combustion engine stops after completion of warming-up, the radiator fan and the electric pump are driven to cool the internal combustion engine, and when a temperature of the coolant decreases to less than a temperature at a time of engine stop, the radiator fan is stopped in a state in which the electric pump is operated.

Abstract: A diesel engine of the present invention includes a turbocharger including: a turbine provided on an exhaust passage; a compressor provided on an intake passage; and a plurality of nozzle vanes provided around the turbine to control a flow velocity of an exhaust gas colliding with the turbine, angles of the nozzle vanes being changeable. In a case where a ratio of a volume of a combustion chamber when the intake valve is closed to a volume of the combustion chamber when a piston is located at a top dead center is denoted by an effective compression ratio ?e, and a total displacement of the engine is denoted by V (L), the effective compression ratio ?e is set to satisfy Formula (1) “?0.67×V+15.2??e?14.8.

Abstract: The present invention relates to a control apparatus and method for an internal combustion engine including two fuel injection valves in the intake port of each cylinder. In the present invention, fuel injection from a first fuel injection valve is activated while fuel injection from a second fuel injection valve is temporarily stopped at the resumption of fuel injection from the deceleration fuel cut-off state in response to a decrease in the engine rotation speed. The amount of minimum fuel injection to each cylinder that ensures the accuracy of fuel measurement can be reduced, and fuel is injected from the first fuel injection valve in an amount equal to or greater than the amount of minimum fuel injection. Thus, fuel injection can be resumed at a lower engine speed than when fuel injection is resumed from the two fuel injection valves.

Abstract: An air boost system for a two-cycle engine, such as an EMD engine, which operates with a gear-driven turbo-supercharger. The turbo-supercharger is undersized for the engine, such that it is insufficient to provide air flow for a target air-fuel ratio above a pre-determined mid-load threshold. An additional turbocharger is installed in parallel with the turbo-supercharger, such that the intake manifold may receive air intake from only the turbo-supercharger or from both the turbo-supercharger and the turbocharger. In operation, the turbocharger is active only at loads above the predetermined load threshold.

Abstract: A supercharged internal combustion engine has cylinder groups with plural cylinders and plural exhaust gas turbochargers. Exhaust gas can be fed to at least one first exhaust gas turbocharger from first outlet valves of the cylinders of the first and second cylinder groups via at least one first exhaust manifold. Exhaust gas can be fed to at least one second exhaust gas turbocharger from second outlet valves of cylinders of the first and second cylinder groups via a second exhaust manifold. At low rotational speeds and/or in part load and/or non-steady state operation, exhaust gas can be fed via the first exhaust manifolds that are connected to the first outlet valves per cylinder group to a turbine of the first exhaust gas turbocharger in flows that can be divided in the inflow region of the turbine, while the second exhaust gas turbocharger is inactive.

Abstract: The present disclosure provides a boosting control method of an engine for cylinder de-activation (CDA). The method includes: a CDA operable area confirming step of determining, by a controller based on a driving state of the engine, whether the CDA is in an operable area after the engine starts; an actual boosting deriving step of deriving a total target boosting from the controller and calculating the desired actual boosting; a supercharger operable area confirming step of determining, by the controller, whether the supercharger is in the operable area; a supercharger target rotation speed deriving step of deriving, by the controller, a target rotation speed of the supercharger; and a supercharger passage opening step of closing a bypass valve to open a supercharger passage.

Abstract: The present disclosure provides a device for variably controlling a flow rate of intake air of a turbocharger compressor including a housing, a compressor wheel, a sliding insert disposed in a straight tube in the housing coaxially with the straight tube, wherein the sliding insert variably adjusts an intake air recirculation passageway while moving closer to or farther from the straight tube in an axial direction, and a drive unit which provides power for moving the sliding insert, such that efficiency of the compressor may be improved because a flow rate of intake air is increased as the intake air is recirculated, and performance of an engine may be improved by improving performance of a turbocharger because an air amount required for the engine may be controlled by means of a variable slit structure.

Abstract: Rotary internal combustion engine includes a body made of four parts, each of which is an L-shaped fragment, and, when connected, forming two mutually perpendicular ring-shaped walls in plan view with ribs on the outer surface and an annular groove inside, which form two passages, each of which contain a torus-shaped rotor, which can move along the groove. Each torus-shaped rotor has longitudinal notches located outside or inside the rotor forming cavities between the rotor and groove surface, connected to chambers located outside the walls. The intake and exhaust windows are made in the walls communicating with the cavities between the rotor and groove surface. The rotors are interconnected by the kinematic chain of rotation synchronization made of successively engaged gears, one of which is engaged with one torus-shaped rotor, and the last of the gears is engaged with the output shaft, rigidly connected with another torus-shaped rotor.

Abstract: A round internal combustion engine (10) comprising: a stationary toroidal combustion chamber (44); a first (24A) and a second (24B) shaft member, each for connecting thereof to at least one piston (26A1, 26A2, 26B1, 26B2) disposed within the stationary toroidal combustion chamber (44); and a positioning mechanism (60), for changing angular positioning and velocity between the first (24A) and second (24B) shaft members, for increasing and decreasing a distance between the pistons (26A1, 26A2, 26B1, 26B2) of the shaft members (24A, 24B), the positioning mechanism (60) comprising: at least one rotatable wheel (28i, 28ii, 28iii) disposed eccentrically (58) within the first shaft member (24A); and at least one rotatable connecting-rod (56i, 56ii, 56iii) disposed between the first (24A) and second (24B) shaft members, for directly connecting an eccentric anchor (36A) of the at least one rotatable wheel (28i, 28ii) to an eccentric anchor (36B) of the second shaft member (24B).

Abstract: A variable compression ratio engine (1) is provided with a multi-link mechanism (101) between a piston (102) and a crankshaft (103). The multi-link mechanism (101) includes an upper link (104), a lower link (105) and a control link (106). An anti-vibration device (6) for vehicles is attached between the upper part of the engine (1) and a vehicle body to which the engine (1) is mounted. The anti-vibration device (6) includes a rod body (63) having a first elastic connecting part (61) at one end and a second elastic connecting part (62) at another end. The first elastic connecting part (61) is connected to the engine (1). The second elastic connecting part (62) is connected to the vehicle body.

Abstract: A component of an internal combustion engine with anti-fouling (e.g., anti-coking) properties, said component comprising a metal surface; a plasma deposition formed layer comprising silicon, oxygen, and hydrogen on at least a portion of said metal surface; and an anti-fouling coating, of an at least partially fluorinated composition comprising at least one silane group, on at least a portion of a surface of said layer.

Abstract: An on-board Flex-Fuel H2 reforming apparatus provides devices and the methods of operating these devices to produce H2 and CO from hydrocarbons and bio-fuels. One or more parallel autothermal reformers are used to convert the fuels into H2 over the Pt group metal catalysts without external heat and power. The produced reformate is then cooled and the dry gas is compressed and stored in vessels at a pressure between 1 to 100 atmospheres. For this system, the pressure of the storage vessels and the flow control curves are used directly to control the amount of the reformers' reformate output. To improve thermal efficiency of a mobile vehicle or a distributed power generator, portion of the reformate from the storage vessels is used to mix with the primary fuels and air as part of a lean burn fuel mixture for the engine/gas turbine.

Abstract: A propulsion system includes a gas turbine engine, an electric motor system having a motor drive electrically connected to the electric machine and an electric motor electrically connected to the motor drive where the electric motor drives a propulsion unit, an electric machine rotatably attached to the gas turbine engine and electrically connected to the electric motor system, an energy storage system having bi-directional electrical connections with the electric motor system and the electric machine, and an Rankine cycle system in communication with the gas turbine engine for recovering waste heat from the gas turbine engine.

Abstract: A system includes a foreign object damage (FOD) screen configured to be disposed upstream of an air intake of a gas turbine engine and to keep debris from entering the air intake. The FOD screen is configured to extend across a fluid flow path extending through the air intake into the gas turbine engine. The FOD screen includes a flexible, woven fabric made of a non-metal material and configured to absorb and dissipate energy from the debris, and the flexible, woven fabric includes a tensile strength ranging between 2700 megapascals (mPa) and 3700 mPa.

Abstract: An apparatus and method of biasing a service tube within a turbine rear frame of a gas turbine engine. The engine includes an engine core having a service fitting. A service tube is mounted to the service fitting and at least one support mount secures the service tube to the engine core. A spring element on the support mount can provide a biasing force to the service tube.

Abstract: A (micro) gas turbine arrangement includes a gas turbine device having a combustor system, a turbine driven by an exhaust gas stream of the combustor system, and a compressor for supplying the combustor system with a compressed oxidant stream, as well as a recuperator for transferring at least a portion of the thermal power of the exhaust gas stream of the turbine to the compressed oxidant stream. At least one bypass diverts at least a portion of the oxidant stream or the exhaust gas stream around at least one heat exchanger of the recuperator, and at least one control element for adjusting the flow through the at least one bypass, to be able to adapt the quantity of heat emitted by the gas turbine arrangement at the design point, and thus to be able to improve the efficiency of a power-heat cogeneration system having such a gas turbine arrangement.

Abstract: A fuel system for an aircraft includes a main pump, a servo pump, a servo minimum pressure valve, and a servo pump bypass connection element. The main pump receives fuel from a source. The servo pump also receives fuel from the source. The servo minimum pressure valve receives fuel from the main pump supplied through a first line and the valve receives fuel from the servo pump supplied through a second line. The servo pump bypass connection element connects the first line and the second line.

Abstract: A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration; and attenuating the component to a desired frequency by forming a plurality of openings in the external metallic shell.

Abstract: An acoustic attenuation panel for a turbojet engine nacelle is provided by the present disclosure. The panel includes at least one alveolar core disposed between at least one internal skin and at least one external skin. In one form, the alveolar core includes a plurality of alveoli having a helical-shaped cavity along an axis in a direction normal to at least one internal skin and at least one external skin.

Abstract: A gear system for a gas turbine engine includes a carrier that includes a first axial face. A plurality of gears are located in the carrier. An opening in the first axial face of the carrier is aligned with one of the plurality of gears. A housing includes a central cavity and is attached to the first axial face of the carrier. The housing includes an energy dissipating member.

Abstract: An air bypass system for a gas turbine engine includes a nozzle for a gas turbine engine. The air bypass system includes the nozzle having an inner band, an outer band, and an airfoil extending between the inner band and the outer band. The airfoil defines an internal passage. A diaphragm includes an inner wall, a first rail, and a second rail, which collectively define a diaphragm cavity. The first rail defines a first rail aperture. A manifold is positioned in the diaphragm cavity. The manifold and the diaphragm collectively define a manifold chamber in fluid communication with the first rail aperture. A tube extends through the internal passage defined by the airfoil and into the diaphragm cavity. The tube is in fluid communication with the manifold chamber. Compressed air flows through the tube into the manifold chamber and exits the chamber through the first rail aperture.

Abstract: An inlet system for a gas turbine includes an integrated inlet bleed heat system, wherein the inlet bleed design is integrated in, e.g., a silencer or inlet.

Abstract: According to an aspect, a correction factor for a fuel flow of a fuel system of an engine is determined. A nominal fuel flow is determined based on a metering valve stroke. The correction factor is applied to the nominal fuel flow to produce an estimated fuel flow to control combustion in the engine.