Abstract: A hot gas path component may include a body, and a passage for delivering a coolant extending through at least a part of the body to an exit area of the body. A metering structure may be in fluid communication with the passage and disposed upstream of the exit area. The metering structure may include a converging passage portion followed by a diverging passage portion.

Abstract: A rotor blade for a turbine of a gas turbine includes an airfoil. The airfoil may have a leading edge, a trailing edge, an outboard, and an inboard end that attaches to a root configured to couple the rotor blade to a rotor disc. The airfoil may have a cooling configuration that includes elongated cooling channels for receiving and directing a coolant through the airfoil. The rotor blade may further include: a tip shroud connected to the airfoil; outlet ports formed through an outboard face of the tip shroud that fluidly communicate with the cooling channels; and flow directing structure formed on the outboard surface of the tip shroud. The flow directing structure may be positioned relative to the outlet ports and configured for directing the flow of coolant discharged from the outlet ports. The rotor blade may be useful to reduce local tip shroud temperature as well as improved stage aerodynamic efficiency by reducing the coolant supply needed to maintain the component at desired temperature levels.

Abstract: A turbine blade comprises a leading edge, a trailing edge, a squealer tip floor, and one or more walls arranged to form a cooling circuit within the turbine blade, the one or more walls forming an impingement shelf having one or more impingement holes through which coolant is expelled to cool the turbine blade.

Abstract: Turn caps for airfoils of gas turbine engines including cavity sidewalls, a first turn cap divider extending between the cavity sidewalls and defining a turning cavity between the first turn cap divider and the cavity sidewalls, and a second turn cap divider disposed radially inward within the turning cavity. A first turning path is defined between the first turn cap divider and the second turn cap divider and a second turning path is defined radially inward of the second turn cap divider and a merging chamber is formed in the turn cap wherein fluid flows through the first turning path and the second turning path are merged, the merging chamber, the first turning path, and the second turning path forming the turning cavity.

Abstract: A blade includes a blade body extending from a blade root to an opposed blade tip surface along a longitudinal axis. The blade body defines a pressure side and a suction side. The blade body includes a cutting edge defined where the tip surface of the blade body meets the pressure side of the blade body. The cutting edge is configured to abrade a seal section of an engine case. A method for manufacturing a blade includes forming an airfoil with a root and an opposed tip surface along a longitudinal axis, wherein the airfoil defines a pressure side and a suction side. The method also includes forming a cutting edge where the tip surface of the airfoil meets the pressure side of the airfoil.

Abstract: A method is disclosed for manufacturing a blade tip coating. The blade tip coating (152) comprising an abrasive (156) and a matrix (154). The method comprises forming a mixture comprising the abrasive, a precursor of the matrix, and an additional particulate (158). The mixture is pressed, the additional particulate acting as a stop to limit thickness reduction of the mixture.

Abstract: A turbine casing includes: a shroud of a cylindrical shape defining an operational flow path between the shroud and a hub of a turbine rotor; a scroll outer peripheral wall continuing from an end side of the shroud and extending along a circumferential direction of the shroud; and a partition wall disposed inside the scroll outer peripheral wall and dividing an inside of the scroll outer peripheral wall into a first scroll flow path and a second scroll flow path disposed adjacent to each other in an axial direction of the shroud. The shroud, the scroll outer peripheral wall, and the partition wall are formed integrally by casting. The partition wall has a widening section which partially increases a communication area between at least two of the first scroll flow path, the second scroll flow path, and the operational flow path, in the circumferential direction of the shroud.

Abstract: A nozzle assembly is disclosed, including a CMC nozzle shell, a nozzle spar, and an endwall. The CMC nozzle shell includes a CMC composition and an interior cavity. The nozzle spar is partially disposed within the interior cavity and includes a metallic composition, a cross-sectional conformation, a plurality of spacers protruding from the cross-sectional conformation, the plurality of spacers contacting the CMC nozzle shell, and a spar cap. The endwall includes at least one surface in lateral contact with the spar cap and maintains a lateral orientation of the CMC nozzle shell and the nozzle spar relative to the endwall. The lateral orientation maintains a predetermined throat area of the nozzle assembly. A method for forming the nozzle assembly includes inserting the nozzle spar into the interior cavity, rotating the CMC nozzle shell and the nozzle spar laterally relative to the endwall, and maintaining the lateral orientation.

Abstract: An apparatus for a shroud assembly for a turbine engine and a method of manufacturing such can include the shroud assembly having one or more shroud segments having an inner face in a circumferential organization around a rotating blade assembly. A near wall cooling passage can be provided in the shroud assembly to cool the inner face of the shroud. The near wall cooling passage can exhaust to a purge cavity, a split line, or at the inner face.

Abstract: A multiwall tubing assembly for fluid delivery to a bearing system may comprise a first tube defining an inner fluid passage configured to carry a first fluid. A second tube may be disposed around the first tube and may define an outer fluid passage between the first tube and the second tube. The outer fluid passage may be configured to carry a second fluid. A fitting may be coupled to the first tube and the second tube. The fitting may comprise an inner portion fluidly coupled to the inner fluid passage and configured to carry the first fluid. An outer portion may be disposed around the inner portion and fluidly coupled to the outer fluid passage. The outer portion may be configured to carry the second fluid. The fitting may be configured to fluidly isolate the first fluid from the second fluid.

Abstract: A turbine arrangement including a rotor and a stator surrounding the rotor and comprising guide vane segments, each guide vane segment comprising an airfoil and a radially inner vane platform. A seal arrangement includes a static seal inward from the inner vane platforms and having a radially extending face plate, first and second cylindrical seal walls extending from outer and inner ends of the annular face plate, an annular seal plate extending radially from the second cylindrical seal wall, and an angel wing extending between the first cylindrical seal wall and the annular seal plate to define a first annular cavity and a second annular cavity. Circumferentially spaced cut-outs define passages through the annular seal plate between the first and second annular cavities and are aligned with fasteners that attach the annular face plate to a support ring for supporting the inner vane platform.

Abstract: Disclosed is an active tip clearance control system (ATCCS) for a gas turbine engine, having an electronically controlled regulating valve directing cooling airflow to a turbine case, and an engine electronic control (EEC), controlling the electronically controlled regulating valve, wherein the EEC controls the electronically controlled regulating valve to regulate cooling airflow according to a selected target blade tip clearance schedule, and wherein the selected target blade tip clearance schedule is selected before or after an engine cycle, from of a plurality of target blade tip clearance schedules, each correlating to one of a plurality of thrust rating applications for the engine.

Abstract: The invention relates to a system for controlling variable-setting blades (14) for a turbine engine, which includes at least one control ring (36) mounted rotatably mobile about an annular casing (16) with axis of revolution A, at least one annular row of variable-setting blades (14) extending substantially radially relative to said axis A and connected to said at least one control ring so that a rotation of the ring about the casing rotates the blades about substantially radial axes B, and means (40) for actuating said at least one ring in order to rotate same about the casing, characterised in that said actuation means are connected to said at least one ring by linking means comprising a shaft (52) extending along an axis C which is substantially radial relative to said axis A and mounted rotatably mobile about said axis C on the housing.

Abstract: A gas turbine is provided with an exhaust diffuser 5 in which an exhaust flow path Pe for circulating exhaust gas from a turbine is formed, and a cooling device 6 for cooling a structure facing the exhaust flow path Pe in the exhaust diffuser 5. The cooling device 6 has a guide part 7 in which a guide flow path Pg for circulating a cooling medium is formed and which guides the cooling medium to the structure, and a switching part 8 able to switch between a first state where a flow rate of the cooling medium flowing through the guide flow path Pg is a first flow rate corresponding to a flow rate during a rated operation and a second state where the flow rate of the cooling medium is a second flow rate higher than the first flow rate.

Abstract: A gas turbine ring segment for a gas turbine. The gas turbine ring segment includes an impingement target wall having an impingement target surface formed in one side, in a direction of a main cavity, and a hot side surface formed on the other side, in which the main cavity is located in a central portion in an axial direction. Cooling holes allowing an inside to communicate with an outside are arranged along the outer circumferential surface at predetermined distances from each other, each of the cooling holes having a straight structure communicating with the main cavity located in the central portion in the axial direction. This configuration consequently omits the structure comprised of a plurality of cooling holes, which has been necessary in the related art, such that the ceramic core that has been necessarily used during machining is unnecessary, thereby significantly reducing machining time and costs.

Abstract: A gas turbine ring segment for a gas turbine. The gas turbine includes a rotor rotating about an axis, a housing containing the rotor to be rotatable, and a stationary wing ring disposed on an inner circumferential portion of the housing to be annular about the axis. A plurality of the gas turbine ring segments is disposed on the gas turbine to be dividable in a circumferential direction. Each of the cooling holes includes a first cooling hole and a second cooling hole having different diameters, the first cooling hole and the second cooling hole being connected serially to each other. This structure controls the flow rate of refrigerant flowing through the cooling holes while maximizing heat transfer efficiency.

Abstract: An apparatus is disclosed, including a first article, a second article, at least one interface structure, and a thermal break directly adjacent to the at least one interface structure. The first article includes a first material composition having a first thermal tolerance. The second article includes a second material composition having a second thermal tolerance greater than the first thermal tolerance. The first article and the second article are in contact with one another through the interface structure. The thermal break interrupts a thermal conduction path from the second article to the first article.

Abstract: A gas turbine engine includes a fan, a compressor section, a combustor, and a turbine section. The engine also includes a rotating element and at least one bearing compartment including a bearing for supporting the rotating element, a seal for resisting leakage of lubricant outwardly of the bearing compartment and for allowing pressurized air to flow from a chamber adjacent the seal into the bearing compartment. A method and section for a gas turbine engine are also disclosed.

Abstract: A gas turbine engine and a flange are disclosed. The gas turbine engine includes a case, and a flange coupled to the case, the flange including a flange body, a fastener hole formed through the flange body, the fastener hole configured to receive a fastener, a radial slot formed through the flange body, wherein the radial slot is adjacent to the fastener hole, the radial slot defines a first portion of the flange body and a second portion of the flange body, and the radial slot prevents transfer of a hoop stress between the first portion and the second portion.

Abstract: A clamp for connecting a first component end to a second component end is provided. The clamp includes a web extending between a first end and a second end, each end being provided with a connecting device for connecting said web ends to each other so that the clamp encloses the component ends. The clamp further includes an alignment structure, which alignment structure is configured to fit with corresponding engagement structures provided at the first component end and the second component end for circumferentially positioning the clamp relative to the component ends.

Abstract: A turbine exhaust assembly for a gas turbine engine according to an example of the present disclosure includes, among other things, a turbine exhaust case comprised of CMC material and attachable to a turbine case, a tail cone comprised of CMC material that has a leading edge and a trailing edge, and an exhaust mixer comprised of CMC material and coupled to the turbine exhaust case. The exhaust mixer has a plurality of lobes arranged about the tail cone to define an exhaust flow path. A plurality of struts extend from the tail cone to support the exhaust mixer at a location aft of the leading edge of the tail cone. A method of assembling a propulsion system is also disclosed.

Abstract: Methods of replacing flex seals in exhaust frames of turbine systems are disclosed. The method may include removing a section of an outer casing of an exhaust frame to form an opening within the outer casing. The section may be formed within a flow path of the exhaust frame. The method may also include removing the flex seal from the exhaust frame via the opening formed within the outer casing, inserting a distinct flex seal within the exhaust frame via the opening formed within the outer casing, and covering the opening formed within the outer casing of the exhaust frame.

Abstract: In some aspects, a steam turbine system includes a high-pressure turbine section; a low-pressure turbine section; a high-pressure control valve operable to provide an adjustable flow of steam into the high-pressure turbine section; a low-pressure control valve operable to provide an adjustable flow of steam into the low-pressure turbine section; a controller associated with the high-pressure control valve and the low-pressure control valve. The controller is operable to: receive measurements of three or more different operating points of the steam turbine system, the measurements of each of the three or more different operating points including a position of the high-pressure control valve, a position of the low-pressure control valve, and two of process variables of the steam turbine system; calculate coefficients of a steam performance map of the steam turbine system based on the measurements; and generate the steam performance map based on the coefficients.

Abstract: This cooling equipment comprises: a refrigerant supply line (81) supplying, to a condenser (6), a condenser refrigerant which cools steam (Sb) that has driven a steam turbine (5), to return the steam (Sb) to water (W); and a cooling part (80) which is disposed on the refrigerant supply line (81), and performs heat exchange between liquefied gas used as fuel for a gas turbine (2) and the condenser refrigerant to heat and vaporize the liquefied gas and to cool the condenser refrigerant at the same time.

Abstract: A method includes determining, via a processor, a commanded temperature rate for a component of a steam turbine system. The method further includes determining, via the processor, a measured temperature rate for the component of the steam turbine system. The method additionally includes determining, via the processor, a variable multiplier based at least in part on the commanded temperature rate and the measured temperature rate. The method also includes deriving, via the processor, a multiplied temperature rate command by applying the variable multiplier to the commanded temperature rate.

Abstract: Provided is a thermal energy recovery device in which poor lubrication of a bearing can be inhibited when an expander is driven. The thermal energy recovery device includes an evaporator (10), an expander (20), a power recovery machine (30), a condenser (40), a pump (50), a circulation flow path (60), a cooling flow path (70) for supplying working fluid from the pump (50) partially to the power recovery machine (30), an on-off valve (V1) provided in the cooling flow path (70), and a control unit (80), in which the expander (20) has a rotor (21), a bearing (22), and a primary casing (23), and in which the power recovery machine (30) has a power recovery unit (31) and a secondary casing (35), and in which upon reception of a stop signal for stopping power recovery by the power recovery machine (30), the control unit (80) closes the on-off valve (V1).

Abstract: The present invention relates to a gas-steam combined cycle centralized heat supply device and a heat supply method. The gas-steam combined cycle centralized heat supply device comprises a gas-steam combined cycle system connected with a thermal station through a heating network return water heating system; the gas-steam combined cycle system comprises a gas turbine connected with a direct contact type flue gas condensation heat exchanger and a steam turbine via a waste heat boiler; the thermal station comprises a hot water type absorption heat pump and a water-water heat exchanger; the heating network return water heating system comprises a steam type absorption heat pump for recovering flue gas waste heat and a steam-water heat exchanger. The present invention can be widely applied to the industry of power plant waste heat recovery.

Abstract: Provided is a thermal energy recovery device in which a site of a circulation flow path between an evaporated portion and an expander can be avoided having too high temperature upon stoppage of power recovery by a power recovery machine. The thermal energy recovery device includes an evaporator (10), an expander (12), a power recovery machine (14), a condenser (16), a pump (18), a circulation flow path (20), a cooling flow path (30) for supplying working medium of liquid phase flowing out of the pump (18) partially to a site of the circulation flow path (20) between the evaporator (10) and the expander (12), an on-off valve (V1) provided in the cooling flow path (30), and a control unit (40), in which upon reception of a stop signal for stopping power recovery by the power recovery machine (14), the control unit (40) opens the on-off valve (V1).

Abstract: A replaceable hydraulic lash adjuster and method for assembling such are disclosed. The replaceable hydraulic lash adjuster includes a body, a piston, a check valve and a spring. The body configured to be received in and released from a compartment of a rocker arm. The body including a sidewall surrounding a floor. The floor including a passage that extends between an upper cavity and a lower cavity of the body. The piston disposed in the lower cavity. The piston defining a pocket. A check valve is disposed inside the lower cavity and a spring is disposed inside the pocket. The replacable hydraulic lash adjuster is configured to be slidingly removeable from the rocker arm.

Abstract: A spark-ignited gas engine system comprises a combustion chamber defined by a piston, a head with a spark plug mechanism, and a cylinder having an associated intake valve and an associated exhaust valve, into which a mixture of combustible gas and air is entered via an intake manifold of the engine to drive a crankshaft. The system further comprises at least one turbocharger to compress the mixture. The system further comprises at least one camshaft, driven by the crankshaft via a gear assembly connected to the crankshaft, that comprises at least one cam that actuates the intake valve and the exhaust valve, at least one camphaser, coupled to the crankshaft via the gear assembly, and a controller to adjust a cam angle operation of the intake valve and the exhaust valve by adjusting the camphaser to a desired phase position to meet a target rotational phase of the camshaft.

Abstract: A high efficiency uniflow steam engine having automatic inlet and exhaust valves rather than camshaft operated valves includes an electromagnet and cooperating armature that actuates a cutoff control valve for closing a steam inlet valve at any time selected to cut off the flow of steam to the cylinder. Approaching the end of the exhaust stroke, e.g., about 0.12 inch before TDC the cylinder can be sealed to thereby compressing the remaining residual steam down to a minute clearance approaching zero, for example, 0.020 inch raising cylinder steam pressure enough to open the steam inlet valve without physical contact between the piston and the steam inlet valve eliminating tappet noise, shock and wear.

Abstract: A variable valve-operating device for an internal combustion engine has a cam carrier with cam lobes formed therearound to act on an engine valve and with a speed increasing side lead groove and a speed decreasing side lead groove formed therearound to be engaged with a speed increasing side switching pin and a speed decreasing side switching pin, respectively, to axially shift the cam carrier, to selectively make one of the cam lobes to be operative. A speed increasing side entry lead groove portion of the speed increasing side lead groove is formed in a position axially overlapping a low speed steady position lead groove portion of the speed decreasing side lead groove. A speed decreasing side entry lead groove portion of the speed decreasing side entry lead groove is formed in a position axially overlapping a high speed steady position lead groove portion of the speed increasing side lead groove. The variable valve-operating device can thus be miniaturized by reducing the axial width of the cam carrier.

Abstract: A variable valve actuation mechanism is provided for an internal combustion engine including at least one valve for control of gas admission to a cylinder of the engine and/or gas exhaust from the cylinder. The mechanism includes two concentrically arranged camshafts, a cam set comprising two cams, each fixed to a respective of the camshafts, whereby the camshafts are arranged to be turned in relation to each other, so as to change the combined profile of the cams, and a cam follower adapted to follow the combined profile of the cams and to actuate at least one of the at least one valve in dependence on the combined profile of the cams, wherein the cam follower includes two rollers, each roller being adapted to follow a respective one of the cams.

Abstract: A lubrication structure for an internal combustion engine includes a crankcase, an oil pump, and a relief valve. The crankcase is configured by connecting an upper crankcase on a mating surface of a lower crankcase, and has an oil pan. The oil pump and the relief valve are installed in the lower crankcase. The oil pump sucks oil in the oil pan through a suction passage, and discharges the oil into a discharge passage. The relief valve performs a valve-opening operation according to pressure of oil in the discharge passage to return surplus oil in the discharge passage to the suction passage through a surplus passage. These passages are formed in the lower crankcase. A relief valve housing section housing the relief valve, and the surplus passage allowing the relief valve housing section and the suction passage to communicate with each other, are provided to communicate with the mating surface.

Abstract: An engine housing component is provided, the housing component defining two or more drain channels configured to receive oil separated from a crankcase ventilation system and to drain said oil through the housing component, wherein the engine housing component comprises two or more drain features, each of the drain features corresponding to one of the drain channels, wherein each of the drain features is configured to allow an oil drain pipe to be coupled to the drain feature such that the oil drain pipe is in fluid communication with the corresponding drain channel, wherein a first drain feature differs from the or each of the other drain features, such that a particular oil drain pipe configured to couple to the first drain feature is not couplable to the other drain features. An engine housing assembly and kit of oil drain pipes is also provided.

Abstract: An internal combustion engine includes: a cylinder having a combustion chamber formed at an upper side thereof and accommodating a piston to be reciprocally movable; a crankcase provided below the cylinder and accommodates a crankshaft; and a blow-by gas passageway recirculating blow-by gas, which leaks into the crankcase from the combustion chamber, to the combustion chamber through an intake system, in which an inner surface portion of the crankcase is provided with a blow-by gas intake part, and the blow-by gas intake part includes a protruding portion protruding in a direction in which the crankshaft extends, and the intake port opened in the protruding direction is formed at a tip end portion of the protruding portion.

Abstract: A system for controlling exhaust noise in a vehicle includes a variable exhaust valve for an exhaust system, and an exhaust valve controller operatively connectable to the variable exhaust valve. The exhaust valve controller is configured to retrieve two or more control conditions, and determine an operational intent based on the two or more control conditions. The exhaust valve controller is configured to generate a control signal based on the operational intent and the two or more control conditions, and transmit the control signal to the variable exhaust valve. The control signal changes an exhaust valve position of the variable exhaust valve. The exhaust valve position is configured to create an exhaust noise response associated with the operational intent.

Abstract: A fuel supply device (2), in particular for use in a motor vehicle comprising an internal combustion engine (20), has a fuel supply pump (4) which is designed to remove fuel (28) from a fuel tank (6) and to release said fuel under increased pressure through an outlet; a first fluid connection (7) which is provided for connecting an exhaust line metering device (8) and; a second fluid connection (10) which is provided for connecting an engine injection device (12). The first fluid connection (7) is directly connected to the outlet of the fuel supply pump (4). A fluid choke (16) is arranged between the outlet of the fuel supply pump (4) and the second fluid connection (10). The invention enables an exhaust line metering device (8) and an engine injection device (12) to be operated reliably on a common fuel supply device (2).

Abstract: Disclosed is a reactive filter, that is a selective catalytic reduction filter or an oxidative reaction filter, including a porous substrate including internal pores having their inner surface, totally or partially, directly coated with a catalytic zeolite material resulting from an in situ hydrothermal synthesis. Also disclosed is a process for preparing such a reactive filter and the use thereof in an engine exhaust depolluting system.

Abstract: A vehicle includes a NOx storage converter to receive exhaust gases from a diesel engine, store at least a minimum amount of the NOx at a temperature below a storage threshold, release the NOx at a temperature above a releasing threshold, oxidize hydrocarbon, and oxidize carbon monoxide. An input temperature sensor at an entrance to the NOx storage converter determines an input temperature of the exhaust gases. An output temperature sensor is at an output of the NOx storage converter to determine an output temperature of the exhaust gases. A control module receives the input temperature and the output temperature, determines a magnitude of an exotherm in the NOx storage converter, and stores an electronic fault code in a computer memory in response to the magnitude of the exotherm being below a minimum temperature. The fault code indicates a reduction in a NOx storage capacity of the NOx storage converter.

Abstract: The invention describes a method for adjusting the pressure in a pumping system (10) of a motor vehicle with an internal combustion engine. The pumping system (10) comprises one or more pumps, wherein each pump is provided with a respective driving motor, and at least one programmable electronic control unit (12). The method comprises the steps of adjusting or mapping the programmable electronic control unit (12) of the pumping system (10), carried out by setting a set of predefined operating parameters of each pump in the programmable electronic control unit (12) of the pumping system (10), and of controlling the operation of the pumping system (10), wherein such control is an open-loop control and wherein the control action is independent from the values of the output parameters of the pumping system (10).

Abstract: A device for catalytic conversion of NOx to 8 and/or of CO to CO2, including: a ceramic support including at least a plurality of channels; a thermal barrier made of thermal insulating material covering at least one part of the internal surface of the channels; porous SiC at least partially covering the thermal barrier such that the SiC is separated from the support by the thermal barrier; one or more conversion catalysts at least on the SiC.

Abstract: The object of the invention is a heater of a corrosive fluid comprising at least one heat diffuser having at least a first portion intended to be immersed in a corrosive fluid, and at least a second portion intended to be arranged out of the corrosive fluid, at least one heating block comprising at least one heating member configured to heat the corrosive fluid, said heat diffuser comprising at least one housing in which the at least one heating block is housed at least partially, at least the first portion of the heat diffuser being made of anodized aluminum or of anodized aluminum alloy and is configured to be in direct contact with the corrosive fluid. The object of the invention is also a corrosive fluid tank comprising a heater according to the invention and a method for manufacturing a heat diffuser of the heater according to the invention.

Abstract: A method is disclosed for determining a current temperature of a heating element with a PTC thermistor property (PTC) with which a urea-water solution for cleaning the exhaust gas in an internal combustion engine of nitrogen oxides can be heated. According to the invention there is provision that a correction factor is formed from the quotient of a minimum resistance of the heating element and of a minimum resistance of a reference heating element, in that a resistance which is determined at a current temperature of the heating element is multiplied by the correction factor, and in that the current temperature of the heating element is determined from the corrected resistance value and a temperature dependence of the resistance of the reference heating element. The method according to the invention permits more precise determination and regulation of the temperature of the heating element.

Abstract: A thermally insulative, flexible, durable reflective exhaust pipe sleeve and method of construction thereof is provided. The sleeve includes a knit, heat-resistant inner layer, a reflective metallic outer layer and an intermediate layer sandwiched between the inner and outer layers. The inner layer is constructed having an inner surface exposed to an inner cavity of the sleeve and the outer layer is constructed having an outer reflective surface exposed to the surrounding environment. The intermediate layer is constructed of a woven material and is sandwiched in abutment with the inner and outer layers. The outer and intermediate layers are convoluted, while the inner layer is cylindrically tubular.

Abstract: A two-piece, stamped muffler having an integrally-attached aerodynamic shield having a flat bottom shape is disclosed. The muffler may be formed with a substantially flat lower surface. The aerodynamically-improved muffler set forth herein is provided as an aerodynamic shield that is incorporated into an extended flange provided in the shell blank, as a deflector that is attached to a muffler lower shell body and the clamshell flange such as by welding, that is separately attached to the clamshell flange only such as by welding, or that is separately attached to the lower shell only, again possibly by welding. For dual stamped mufflers, the shield may be used jointly with an incremental shield separate from, or integrated into, the spare tire well to connect the twin dual muffler shields to achieve vehicle aerodynamic requirements. A muffler having the aerodynamic shield deflects underbody air flow outside of the rear fascia cavity.

Abstract: A housing for an aftertreatment system is disclosed. The housing includes a wall that defines an interior cavity. The interior cavity is configured to enclose at least one aftertreatment component. Moreover, the wall has at least one corrugated panel having alternating grooves and ridges.

Abstract: The disclosure relates to a gas-carrying exhaust gas housing of an internal combustion engine comprising: a manifold section, having a central axis and multiple manifold pipe connectors, for securing on a flange plate for connecting to a cylinder of an internal combustion engine; a catalyst housing section having a central axis; and an exhaust pipe connector section provided downstream of the catalyst housing section, for connecting to an onward-conveying exhaust system. In addition, together with catalyst housing section and exhaust pipe connector section, the manifold section forms a two-shell exhaust housing having a first half shell and a second half shell, wherein the two half shells have a separation plane (T) running parallel to the central axis at least in sections, wherein the manifold section has multiple integral manifold pipe connectors which can be attached directly to a flange plate.

Abstract: In an internal combustion engine, a thermostat valve for changing over between coolant circulation through a radiator-routing passage to coolant circulation through a bypass passage, is provided with a first valve for opening and closing the radiator-routing passage, and a second valve for opening and closing the bypass passage. The first and second valves and are operable concurrently. A cylinder coolant jacket around cylinder bores of a cylinder portion is partitioned into two in a cylinder axis direction to thereby form a main cylinder coolant jacket on a side of a cylinder head portion and a sub-cylinder coolant jacket on a side of a crankcase portion. The bypass passage is formed partly by the sub-cylinder coolant jacket. The above arrangement expedites warming-up during the engine start and achieves favorable appearance by a simplified structure.

Abstract: Intake assemblies for an engine are provided. In one aspect, an air intake assembly includes a screen defining a plurality of air passage holes therein, a fan, a flywheel, a crankshaft, and a screen support member coupled to the screen. The fan, the flywheel and the screen support member are coupled to the crankshaft with a single fastener, and the screen, the fan, the flywheel, the crankshaft and the screen support member all rotate together. In one aspect, the screen support member supports the screen a distance away from the fan such that the screen is completely spaced-apart from and does not engage the fan. In one aspect, a screen support member includes a base near one end of the screen support member and a plurality of coupling locations near a second end. The screen couples to the screen support member at the plurality of coupling locations.