Abstract: The present teachings include a power generation system for recovering waste heat energy from a power plant having a coolant circuit that extends through the power plant. The coolant circuit may also include a radiator and a coolant pump configured to circulate the coolant between the internal combustion engine and the radiator. The power generation system may also include a waste heat recovery circuit including a Roots-type fluid expander configured to generate power at an output shaft by expanding a portion of the coolant and being configured to deliver the power back to the internal combustion engine crankshaft via the output shaft. The waste heat recovery circuit may further include a circulation pump configured to circulate coolant between the Roots-type expander and the coolant circuit. A condenser may also be provided to condense the coolant leaving the Roots-type fluid expander at least down to a saturated liquid.

Abstract: A waste heat recovery system and control system and method of controlling a waste heat recovery system and control system is provided. The waste heat recovery system and control system comprises a pump, a heat exchanger, an expansion device, a condenser, a plurality of sensors, and a controller. The heat exchanger is in thermal communication with an exhaust of the internal combustion engine. The condenser is in thermal communication with the expansion device and the pump. The plurality of sensors is in communication with the waste heat recovery system. The controller is in communication with the plurality of sensors. In response to information obtained from the plurality of sensors, the controller calculates an efficiency of the waste heat recovery system based on models of the waste heat recovery system and implements a set of control inputs to implement the calculated efficiency on the waste heat recovery system.

Abstract: A waste heat recovery system for use with a cooling system of an internal combustion engine is provided. The waste heat recovery system comprises a condenser, a pump, a fluid reservoir, a heat exchanger, an expansion device, and an auxiliary cooling device. The condenser is in thermal communication with the cooling system of the internal combustion engine. The heat exchanger is in fluid communication with the pump and thermal communication with an exhaust of the internal combustion engine. The expansion device is in fluid communication with the heat exchanger and the condenser. The auxiliary cooling device is in fluid communication with at least one of the condenser, the expansion device, and the fluid reservoir. In response to an effectiveness of the condenser in dissipating heat from the waste heat recovery system to the cooling system of the internal combustion engine, the auxiliary cooling device is selectively actuated.

Abstract: The present invention relates to a passive low temperature heat energy organic working fluid power generation method and system, Comprising: organic working fluid in a first evaporator and a second evaporator are heated to evaporate; when a pressure of the organic working fluid reaches a setting pressure, a self-operating pressure control valve at an outlet of the evaporator is triggered opening by a working pressure, and steam of the organic working fluid flows into a turbine, pushes the turbine to work, and drives a generator to output electric energy; after work is completed, the steam flows into a condenser to be condensed, and working steam is output in turn through the first evaporator and the second evaporator, and thus the turbine is driven continuously to work and output electric energy. Compared with the prior technology, the present invention has reliable performance, and is operated by heating and evaporating of the working fluid in a closed space to achieve increased pressure.

Abstract: An anti-rotation guide for a lifter in an overhead valve valvetrain. The anti-rotation guide includes a plug having two lobes connected through a neck region. A first lobe of the plug is held within a bore in the lifter. The bore forms an opening at the edge of the lifter through which the neck of the plug emerges. The bore in the lifter accommodates a first lobe of the plug that is wider than the opening in the edge of the lifter, whereby the plug is shaped to prevent its slipping from the lifter through the opening. The lifter reciprocates in a first bore in the cylinder head. The second lobe of the plug extends outward from the lifter into a second bore formed in the cylinder head and adjoining the first bore. The second lobe reciprocates in the second bore and limits rotation of the lifter.

Abstract: A valve timing controller includes: an outer rotor; an inner rotor relatively rotating inside of the outer rotor; a torsion coil spring having a fixed end connected with the inner rotor, and a free end connected with the outer rotor; and a bush rotor coaxially projected from the outer rotor or the inner rotor to support the torsion coil spring in a radial direction. The torsion coil spring biases the inner rotor while being connected with the outer rotor by being torsionally deformed according to a relative rotation of the inner rotor to the outer rotor. A load acting from a first turn of the torsion coil spring adjacent to the free end is smaller than a load acting from a wound part of the torsion coil spring between the first turn and the fixed end.

Abstract: A hydraulic camshaft adjuster, including a two-part rotor connected at least to a camshaft in a rotationally fixed manner. The at least two-part rotor can be rotated about an axis and comprises a first rotor element and a second rotor element. The first rotor element and the second rotor element are axially preloaded against the camshaft in a frictionally locked manner exclusively by means of a threaded connection.

Abstract: A switching rocker arm assembly constructed in accordance to one example of the present disclosure can include an outer arm, an inner arm, a pivot axle, a bearing axle, a first torsional bearing axle spring and a second torsional bearing axle spring. The outer arm can have a first outer side arm and a second outer side arm. The outer arm can further include first and second torsional spring mounts. The inner arm can be disposed between the first and second outer side arms. The pivot axle can support the inner and outer arm for relative pivotal movement therearound. The bearing axle can support a bearing. The first torsional bearing axle spring can be mounted around the first torsional spring mount and have a first end engaged to the bearing axle and a second end engaged to the outer arm. The first end extends inboard relative to the second end.

Abstract: A continuously variable valve lift apparatus may include a camshaft, a cam portion of which a cam is formed thereto and the camshaft is inserted into therein, a slider housing of which the cam portion is rotatably inserted therein, of which a position with respect to the camshaft is movable and of which a guide slot is formed thereto, a control portion selectively changing the position of the slider housing, a guide shaft disposed parallel to the camshaft and inserted into the guide slot for guiding movement of the slider housing, an output portion rotatable around a pivot shaft and of which a valve shoe is formed thereto and a valve unit driven by the valve shoe.

Abstract: A vehicle includes an electric machine configured to recharge a battery through regenerative braking, an electric heater configured to heat a powertrain lubricating oil, and a controller. The controller, in response to a temperature of the powertrain lubricating oil being less than a threshold, directs regenerative braking power to the electric heater.

Abstract: A method for operating an oil circuit for a vehicle, the oil circuit being configured to supply oil to an internal combustion engine, wherein the oil circuit includes an oil cooler, and wherein at least one temperature sensor measures the temperature of the oil flowing through the oil circuit, downstream of the oil cooler and upstream of the internal combustion engine, the temperature sensor being connected for signaling purposes to a regulating and/or control device, includes: controlling and/or regulating, by the regulating and/or control device, the temperature of the oil flowing through the oil circuit, such that the temperature measured by the temperature sensor has a defined target temperature value; and setting and/or adjusting, by the regulating and/or control device, as a function of a drive power of the internal combustion engine, the defined target temperature value so as to reduce fuel consumption of the internal combustion engine.

Abstract: An exhaust system for an internal combustion engine, configured to enhance a silencing effect while being miniaturized. The exhaust system includes a muffler body configured in such a manner that a first expansion chamber and a second expansion chamber separated from each other are partitioned therein. A plurality of exhaust pipes extend from an internal combustion engine and are connected to the first expansion chamber. A communication pipe is configured to be connected to the first expansion chamber and the second expansion chamber, to merge exhaust gas from the plurality of exhaust pipes, and to introduce the merged exhaust gas into the second expansion chamber.

Abstract: An exhaust gas muffler of an internal combustion engine, including a muffler housing having an exhaust gas inlet and an exhaust gas outlet and including a first Helmholtz resonator made of a first housing portion that delimits a first Helmholtz volume and includes a first coupling pipe. At least one second Helmholtz resonator is provided made of a second housing portion that delimits a second Helmholtz volume and includes a second coupling pipe via which the second Helmholtz volume can be coupled to an exhaust gas flow A of the exhaust gas inlet. The second coupling pipe is arranged at least partly within the first coupling pipe, and both coupling pipes delimit an annular gap R via which the first Helmholtz volume can be coupled to the exhaust gas flow A.

Abstract: A connection pipe (7), for the fluidic connection of a muffler housing (5) of an active muffler (4) with an exhaust gas-carrying pipe (3) of an exhaust line (2) of an exhaust system (1) for an internal combustion engine, of a motor vehicle, has a pipe wall (8), which envelopes a connection space (9) leading from the muffler housing to the exhaust pipe. A cooling pipe (14), through which a coolant can flow, has an inlet section (15) and an outlet section (16) and is arranged in the connection space. The inlet section (15) passes through the pipe wall (8), whereby a coolant inlet (17), through which coolant can enter the cooling air pipe, is arranged outside the connection pipe (7). The outlet section passes through the pipe wall, whereby a coolant outlet (19), through which coolant can escape from the cooling pipe, is arranged outside the connection pipe (7).

Abstract: An adaptive valve assembly includes a pipe defining a passageway for conducting engine exhaust gases, a pivot shaft supported by the pipe, and a valve body coupled to the pivot shaft. The valve body is moveable between an open position where exhaust gas flow through the passageway is increased and a closed position where exhaust gas flow through the passageway is reduced. A spring biases the valve body toward the closed position. The spring includes a plurality of coils that have torsional displacement relative to each other as the valve body moves between the open and closed positions. A torsional damper feature is associated with at least one coil of the plurality of coils to provide torsional spring damping.

Abstract: Insulation system for thermoacoustic insulation of a component to be insulated, such as an exhaust gas component, comprising a fiber molded part having a surface facing away from the component to be insulated, where the surface facing away is at least in part jacketed with a cladding, and having an insulation surface facing the component to be insulated, where the fiber molded part is applied to the component to be insulated such that at least one cavity is formed between a portion of the insulation surface of the fiber molded part and the component to be insulated.

Abstract: A method of operating an aftertreatment system of an internal combustion engine having a lean nitrogen-oxides trap and a reductant storage device placed downstream of the lean nitrogen-oxides trap is disclosed. A regeneration of the lean nitrogen-oxides trap is performed. During the regeneration, a reductant concentration between the lean nitrogen-oxides trap and the reductant storage device is measured. An amount of reductant produced by the nitrogen-oxides trap is calculated on the basis of the measured concentration. The amount of reductant produced may be used to stop regeneration of the LNT if this amount reaches the maximum available storage capacity, or to trigger a test of the proper functioning of the reductant storage device if there is at least a minimum amount of reductant available, or to switch to another operation mode of the reductant storage device and/or the LNT, in particular if this amount is larger than a threshold value.

Abstract: A method for controlling an emission amount in an exhaust gas stream emitted from a power generation system is presented. The method includes determining a pre-catalyst emission level using a combustion engine model. The method further includes determining a post-catalyst emission level using a three-way catalyst model based on the pre-catalyst emission level. Furthermore, the method includes determining an adjusted post-catalyst emission level based on the post-catalyst emission level. Moreover, the method includes determining a difference between the post-catalyst emission level and the adjusted post-catalyst emission level and comparing the difference with a threshold value. Additionally, the method includes determining whether to adjust an actual value of an engine operating parameter based on the comparison such that the emission amount in the exhaust gas stream is maintained below an emission regulatory limit. An engine controller and a power generation system employing the method are also presented.

Abstract: An exhaust treatment system is provided for treatment of an exhaust stream, where the system comprises a first dosage device, arranged to supply a first additive into said exhaust stream and a first reduction catalyst device, arranged downstream for reduction of nitrogen oxides in said exhaust stream through the use of said first additive, and for the generation of heat through at least one exothermal reaction with said exhaust stream. A particulate filter arranged downstream of said first reduction catalyst device to catch soot particles. A second dosage device arranged downstream of said particulate filter to supply a second additive into said exhaust stream and a second reduction catalyst device, arranged downstream of said second dosage device for reduction of nitrogen oxides in said exhaust stream through the use of at least one of said first and said second additive.

Abstract: A mixing device for an exhaust gas conduit comprises a first, inner sleeve having an upstream end, a downstream end and an inner passage extending therethrough having a diameter “D”. A deflector fin is formed in the first, inner sleeve and extends into the inner passage. A second, outer air-gap shell has an upstream end, a downstream end and a central portion having a diameter “D1” that is larger than the diameter D of the first, inner sleeve. The inner sleeve is disposed in the second, outer air-gap shell and the upstream and downstream ends are sealingly fixed to the first, inner sleeve to define an air-gap about the portion of the first, inner sleeve in which the deflector fin is formed.

Abstract: One form of the present application is an apparatus including an internal combustion engine structured to produce an exhaust flow, an exhaust system structured to receive the exhaust flow, and a reductant injector structured to inject reductant into a primary passage of the exhaust system upstream of a catalyst. The apparatus further includes an injector passage structured to receive a portion of exhaust upstream of the injector and further structured to flow the exhaust into the primary passage around the injector in a manner such that deposit formation is reduced.

Abstract: A heat recovery component for an exhaust gas system comprises: an inlet; an outlet; a first branch conduit comprising a first inlet, a first inlet axis, a first outlet, and a heat exchanger; a second branch conduit parallel to the first branch conduit, separate and thermally separated from the first branch conduit and comprising a second inlet, a second inlet axis, and a second outlet; and a valve arranged at the first inlet and the second inlet. The valve comprises separate first and second valve flaps fixedly arranged on a shaft and extending in a plane defined by the first and second inlet axes and perpendicular to the first and second inlet axes. The first valve flap is arranged at an axial location on the shaft corresponding to the location of the first inlet, and the second valve flap is arranged at an axial location corresponding to the second inlet. The valve flaps are arranged angularly rotated relative to one another about the shaft.

Abstract: In an exhaust gas purification apparatus for an internal combustion engine in which a filter for trapping PM, and a deflector for deflecting exhaust gas flowing into the filter, are arranged in an exhaust passage, in cases where a state continues in which the flow rate of the exhaust gas does not change relatively, regeneration processing of the filter is carried out so that a local excessive temperature rise resulting from non-uniform deposition of PM does not occur.

Abstract: There is provided an exhaust purification apparatus for an internal combustion engine in which a catalyst capable of adsorbing and oxidizing hydrocarbon is provided in an exhaust pipe, the exhaust purification apparatus including temperature detection means for detecting a temperature of the catalyst, estimation means for accumulating a time during which the temperature of the catalyst detected by the temperature detection means is equal to or less than a predetermined temperature, and estimating an amount of hydrocarbon adsorbed on the catalyst from the accumulated time, and control means for controlling fuel ejection of the internal combustion engine in a first ejection mode in which the temperature of the catalyst is increased to a temperature where hydrocarbons adsorbed on the catalyst are oxidized, in a case in which the amount of hydrocarbons estimated by the estimation means exceeds a predetermined upper limit.

Abstract: A mixing system for an exhaust sampling system is disclosed. In one example, the mixing system includes a mixing passage, an exhaust pipe, and a mixer. The mixing passage has a dilution gas inlet configured to receive a dilution gas. The exhaust pipe provides exhaust gas to the mixing passage. The mixer is disposed within the mixing passage and is configured to mix the dilution gas and the exhaust gas. The mixer has an inlet and an outlet, where the mixer inlet is configured to receive the exhaust gas, and the mixer outlet is disposed downstream of the mixer inlet. The mixer includes a plurality of radially extending lobes that are circumferentially disposed about a longitudinal axis of the mixer.

Abstract: A method for determining the aging of an oxidation catalyst in an exhaust gas aftertreatment system of an internal combustion engine, having the following steps: ascertaining a soot burn rate of a particle filter of the exhaust gas aftertreatment system; adapting a function having at least one adaptation parameter to the soot burn rate dependent on at least one variable, a value of the adaptation parameter depending on an aging of the oxidation catalyst; and determining the aging of the oxidation catalyst using the adaptation parameter value ascertained by adapting the function.

Abstract: A preheating control for controlling an energization of a heater is executed so that a sensor element of an exhaust gas sensor is preheated within a temperature range in which no element crack caused by water occurs until a predetermined preheating period elapses after an engine starts. In performing the preheating control, first, an energization duty of the heater is set to a preheating promotion energization duty to promptly raise a temperature of the sensor element until it is determined that the temperature of the sensor element reaches a predetermined upper limit temperature. After it is determined that the temperature of the sensor element reaches the upper limit temperature, the energization duty of the heater is set so that the temperature of the sensor element is maintained at the upper limit temperature to sufficiently raise the temperature of the overall sensor element during the preheating control.

Abstract: Systems and methods are described for sensing particulate matter in an exhaust system of a vehicle. An example system comprises a particulate matter sensor and a guiding plate spaced away from each other in a tube capable of receiving a portion of exhaust gas in an exhaust passage.

Abstract: A thermal management system for an aftertreatment system includes an air pump and a compressed air rail. The compressed air rail is fluidly connected with the air pump. The thermal management system further includes a first valve located between the compressed air rail and an exhaust outlet pathway. The first valve is configured to selective supply air to the aftertreatment system of the engine. The thermal management system further includes a heater located between the compressed air rail and the first valve. The heater is configured to heat the air before supplying air to the aftertreatment system of the engine.

Abstract: An exhaust pipe mounting unit for a vehicle is provided. The exhaust pipe mounting unit includes a main body that has an operation aperture formed at the center thereof and a connection aperture that is formed at a first side in a length direction of the main body to couple a connection load of a bracket mounted in a lower portion of a vehicle body. A mounting aperture is formed at a second side in a length direction of the main body to connect a hanger rod disposed in an exhaust pipe. A chamber is formed in a lower portion of the interior of the main body to be connected to an internal circumferential surface of the mounting aperture and a lubricant is filled therein. Further a piston within the chamber selectively supplies a lubricant filled in the chamber to an internal circumferential surface of the mounting aperture, upon translation of the exhaust pipe.

Abstract: A device and method for cooling an air cooled motorcycle engine. A fan and a cover acting as a duct directs engine heat forward away from a rider when the motorcycle engine is hot and the motorcycle is stopped. When the motorcycle is in motion the fan is switched off and the passing air takes a reversed path and flows rearward over the engine fins cooling the engine.

Abstract: A cooling system of an engine may include a cylinder liner formed in a hollow cylindrical shape and pressed against an inside of a cylinder of the engine, a block coolant jacket positioned in an outer side of the cylinder liner in a radial direction to cool a cylinder block, the cylinder block provided with the cylinder liner and the block coolant jacket therein, and a cylinder head engaged on the cylinder block, including an exhaust port and an intake port fluidically-communicated with a combustion chamber and respectively formed at an exhaust side and an intake side, and provided with a head coolant jacket inside, in which the block coolant jacket includes an upper coolant jacket and a lower coolant jacket and a division wall is disposed between the upper coolant jacket and the lower coolant jacket to block fluid flow therebetween.

Abstract: A cooling device for an engine includes a radiator route passing through a radiator, that are merged together after being branched on the downstream side from the inside of the engine in a coolant circuit configured to allow a coolant to flow from a pump through the inside of the engine and return to the pump. An at-stop control section provided in the cooling device controls a multiway valve that has three discharge ports, including a radiator port connected to the radiator route, so as to close the radiator port and open at least one of the other discharge ports when an ignition switch is turned off.

Abstract: An engine cooling system includes a coolant circuit, a multi-way valve, a relief route and a relief valve. The coolant circuit includes a first route and a second route into which the coolant circuit is branched off at a branched position. The first route passes through a radiator. The multi-way valve is provided at the branched position. The relief route sets a relief source to a portion downstream of a pump and upstream of the multi-way valve in the coolant circuit, sets a relief destination to a portion downstream of the radiator in the first route, and causes coolant to flow from the relief source to the relief destination so as to bypass the multi-way valve. The relief valve interrupts circulation of coolant through the relief route when the relief valve is closed, and permits circulation of coolant through the relief route when the relief valve is open.

Abstract: A thermostat valve has a cylindrical valve housing formed as a single integrated unit out of synthetic resin material, having an annular body and a frame attached to one end of the annular body by a plurality of legs, a disk-shaped valve stem disposed in another end of the valve housing and movable along an axial direction, a spring seat that holds an opposite end of spring means away from the valve stem and locked and held in place by hooks at tips of locking arms extending from the valve housing, and a thermo-element fixedly mounted to an element guide provided in the frame of the valve housing that moves the valve stem in a valve opening direction in response to fluid temperature. An annular step having a top portion of predetermined width is formed adjacent to the rim of the opening in the one end of the valve housing.

Abstract: A condensed water discharge apparatus in an engine of a vehicle provided with a water cooling type intercooler installed integrally with an intake manifold includes a body provided on the intake manifold and having a designated receipt space formed therein to store condensed water generated by the intercooler and a discharge hole formed in the receipt space to discharge the condensed water stored in the receipt space to the outside through the discharge hole; a discharge valve configured to open and close the discharge hole; and an operating unit connected to the discharge valve to operate the discharge valve.

Abstract: A system includes a turbocharger, a wastegate, and one or more thermoelectric generators. The turbocharger includes a turbine and a compressor, and is configured to be coupled to an internal combustion engine. The wastegate is coupled to the turbine, and is disposed within a wastegate enclosure. The one or more thermoelectric generators generate energy from engine exhaust flowing through the wastegate. Each of the thermoelectric generators comprising includes a hot side coupled to the wastegate enclosure, a cold side coupled to a coolant supply, and one or more thermoelectric materials disposed between the hot side and the cold side.

Abstract: A turbocharger includes a waste gate valve, a compressor, a turbine, a turbine housing which houses the turbine, a bypass channel which bypasses the turbine, a bypass channel section arranged in the turbine housing, an actuator housing which has a separate coolant channel, an electric motor arranged in the actuator housing, a transmission which has an output shaft, a control body coupled to the output shaft, and an actuator cover. The transmission is arranged in the actuator housing. The actuator housing is detachably secured to the turbine housing. The control body controls an opening cross-section of the bypass channel. The separate coolant channel of the actuator housing surrounds a circumference of the transmission and is closed axially by the actuator cover.

Abstract: A forced induction apparatus for an engine includes a first forced induction device including a first bearing and a first oil passage that passes by the first bearing and a second forced induction device including a second bearing, a second oil passage that passes by the second bearing, and a drain passage that is in communication with the first oil passage. The second forced induction device is located below the first forced induction device, and the drain passage receives oil from the first oil passage and discharges the oil out of the second forced induction device.

Abstract: A method of controlling an air intake flow in a rotary engine having primary and secondary inlet ports, including positioning the secondary inlet port rearwardly of the primary inlet port and forwardly of the exhaust port along a direction of a revolution of the rotor, and controlling air intake flows communicating between an air source and the primary and secondary inlet ports. During engine start-up, a primary valve is closed to prevent the intake air flow between the primary inlet port and the air source and a secondary valve is opened to allow the intake air flow between the secondary inlet port and the air source. A rotary engine defining different compression ratios through actuation of a valve is also discussed.

Abstract: In a package-storage type engine generator, a package (2) is partitioned into an upper section and a lower section. An engine (11) and a generator (12) are disposed in the lower section, and a radiator (42) and a radiator fan (43) are disposed in the upper section. An upper/lower partition member (32) partitions the package (2) into the upper section and the lower section. A portion of the upper/lower partition member (32), which faces the radiator fan (43), is formed in a downward inclined shape from a center portion to an outer edge portion of the package.

Abstract: A combined-cycle combustion control type three-cylinder engine includes: a cylinder block; and cylinders arranged in a row in the cylinder block and consisting of first, second, and third cylinders so that four-cycle combustion is performed in two of the first, second, and third cylinders and two-cycle combustion is performed in the remaining cylinder. A crankshaft is provided in first, second, and third pistons and converting reciprocating motions of the respective first, second, and third cylinders into rotational motions.

Abstract: Provided is a system and a method which allow hydrogen to be produced both efficiently and in a stable manner when using exhaust gas produced by power generation as a heat source for the dehydrogenation reaction, controlling the temperature of the dehydrogenation reaction within an appropriate range.

Abstract: A waste heat recovery device includes: a low-boiling-point medium Rankine cycle in which a low-boiling-point medium circulates while the low-boiling-point medium is repeatedly condensed and evaporated; a heated water line that guides liquid water, which is heated here, to the low-boiling-point medium Rankine cycle from a waste heat recovery boiler; and a water recovery line that returns the water, which has passed through the low-boiling-point medium Rankine cycle, to the waste heat recovery boiler. The low-boiling-point medium Rankine cycle includes a heater that heats the low-boiling-point medium by exchanging heat between the low-boiling-point medium, which is a liquid, and liquid water, which has passed through the heated water line.

Abstract: A turbofan engine according to an exemplary aspect of the present disclosure includes, among other things, a fan having a plurality of blades, and a transmission is configured to drive the fan. The fan blades have a peak tip radius RT. The fan blades have an inboard leading edge radius RH at an inboard boundary of the flowpath. A ratio of RH to RT is less than about 0.40.

Abstract: A system is disclosed one form of which is an aircraft that includes a pod capable of housing a work providing device. The pod can also include a thermal conditioning system and a power generation device that can be powered from the work providing device. The pod can provide thermal conditioning services and power services to a payload aboard the aircraft. In one non-limiting form the payload is a directed energy member that can be cooled using the thermal conditioning system and powered using the power generation device.

Abstract: A precooler system having a symmetrical precooler core that is optimized to be integrally mounted to the turbofan engine, regardless of the turbofan engine size, is provided. The provided precooler system optimizes available space between a turbofan engine and the nacelle, and does not substantially increase weight and cost. The provided precooler system may be flexibly implemented as either a right handed precooler system or a left handed precooler system.

Abstract: A start inverter for an electric engine start scheme includes an inverter phase leg with solid-state switches and a pulse width modulator operatively connected to the solid-state switches of the inverter phase leg. The pulse width modulator provides command signals to the solid-state switches of the inverter phase leg to invert direct current into alternating current with less ripple than a start inverter with two solid-state switches per phase leg.

Abstract: A multi-body gas turbine engine, especially an aircraft engine, comprising at least one low-pressure rotating body , a high-pressure rotating body, and a starter to rotate the high-pressure body in order to start the engine, wherein the starter is coupled to the low-pressure body and the engine comprises a first disengageable coupling device disposed between the low-pressure body and the high-pressure body , for rotatably connecting the high-pressure body to the low-pressure body so as to allow the starting of the engine by means of the starter.

Abstract: A seal for sealing a combustor heat shield against an interior surface of a combustor shell, the seal comprising: a first sealing surface on the interior surface of the combustor shell; and a second sealing surface on a rail on an edge of a heat shield, wherein each of the first and second sealing surfaces include first and second projections defining a non-linear leakage path between the projections.