Abstract: A method for operating an exhaust-gas aftertreatment system arrangement is provided. The method includes in a first operating state, flowing a substantial majority of an exhaust-gas stream from the internal combustion engine through a first NOx storage catalytic converter positioned in a main exhaust branch of an exhaust aftertreatment system arrangement and in a second operating state, flowing a substantial majority of the exhaust-gas stream through a first bypass branch branching off from the main exhaust branch upstream of the first NOx storage catalytic converter and which opens into the main exhaust branch downstream of the first NOx storage catalytic converter and regenerating the first NOx storage catalytic converter.

Abstract: Disclosed is a power system having a turbocharger, a VG turbocompound turbine, and a controller. The turbocharger has a turbine coupled to a compressor, and the VG turbocompound turbine positioned downstream of the turbine relative to a direction of a flow of an exhaust gas flowing through the turbine and the VG turbocompound turbine. The controller sends a signal to adjust a geometry of the VG turbocompound turbine so as to adjust a boost level being provided by the turbocharger.

Abstract: An external combustion engine is disclosed. The external combustion engine includes a working fluid and a burner element, at least one heater head defining a working space, at least one piston cylinder containing a piston, a cooler, a crankcase including a crankshaft for producing an engine output, a rocking beam, a piston rod connected to the piston, a rocking beam driven by the piston rod, and a connecting rod connected at a first end to the rocking beam and at a second end to a crankshaft to convert rotary motion of the rocking beam to rotary motion of the crankshaft. The external combustion engine also includes an airlock space separating the crankcase and the working space for maintaining a pressure differential between the crankcase housing and the working space housing and an airlock pressure regulator connected between the crankcase and one of the airlock space and working space.

Abstract: In a compressor (11) of a turbocharger (1), a compressor wheel (14) is provided in a housing (12) to be capable of rotating. When the wheel (14) rotates, air suctioned through an inlet of the housing (12) is compressed and then discharged through an outlet of the housing (12). Further, an abradable seal layer (16) formed on an inner surface of the housing (12) is abraded by a vane (13) of the rotating wheel (14) such that a tip clearance between the vane (13) and a part of the inner surface of the housing (12) that opposes the vane (13) is adjusted. A corner portion (13a) of the vane (13) on the outlet side of the housing (12) is shaped to move gradually further away from a shroud curve (Lc) of the seal layer (16) toward an end portion of the vane (13) on the outlet side of the housing (12).

Abstract: Provided is a power generating apparatus including an evaporator configured to evaporate a working medium with a heating medium supplied from the outside of a working medium flow path, an expander to which a driven machine is connected and which is configured to convert expansion force of the evaporated working medium into rotational force to drive the driven machine, a condensing mechanism configured to condense the working medium discharged from the expander with a cooling medium supplied from the outside of the working medium flow path, the condensing mechanism having at least one heat exchanger pipe through which the working medium flows, a cooling water sprayer configured to spray cooling water as the cooling medium over the surface of one or a plurality of heat exchanger pipes of the at least one heat exchanger pipe, and a cooling fan configured to blow ambient air over the one or a plurality of heat exchanger pipes to evaporate cooling water attached to the surface of the one or a plurality of heat exc

Abstract: A system for cooling an angelwing coupled to a rotor blade in a gas turbine engine is provided. An angelwing coupled to a shank of a rotor blade includes at least one cooling passage extending from at least one inlet opening coupled in flow communication with a gas turbine engine inner wheelspace to at least one outlet opening coupled in flow communication with a gas turbine engine outer rotor/stator cavity. The at least one outlet opening is located in an upper surface of the angelwing. The at least one cooling passage receives pressurized cooling air channeled from the inner wheelspace, such that the pressurized cooling air is channeled into the at least one inlet opening and discharged from the at least one outlet opening.

Abstract: An aftertreatment system comprises a first passageway to receive a first portion and a second passageway to receive a second portion of the exhaust gas from the engine. The first and second passageways can have the same length. A first selective catalytic reduction system is fluidly coupled to the first passageway to receive and treat the first portion. A second selective catalytic reduction system is fluidly coupled to the second passageway to receive and treat the second portion. A plurality of sensors are disposed on the first passageway and/or the first selective catalytic reduction system to sense operational parameters of the first portion of the exhaust gas. A controller is in electronic communication with the plurality of sensors to determine the operational parameters of the first portion and to determine operational parameters of the second portion of the exhaust gas based upon the first operational parameters.

Abstract: A motor-vehicle engine system comprises a first DOC configured to receive exhaust from an engine and an SCR device coupled downstream of the first DOC in a flow direction of the exhaust. The system further comprises a second DOC coupled downstream of the SCR device. The system takes advantage of hydrocarbon sorption in the SCR catalyst that is a function of temperature to enable reduced hydrocarbon emissions via oxidation at the second DOC.

Abstract: Methods and systems are provided for reducing turbo lag in a boosted engine. A boost reservoir coupled to the engine may be charged with compressed intake air and/or combusted exhaust gas. The pressurized charge may then be discharged during a tip-in to either the intake or the exhaust manifold.

Abstract: A wave energy transformation device including an array of members connected together to form a structure having a substantially hexagonal geometry, the array has link members, nodes and absorbers and the relative motion of at least some of the members of the array, as caused by the energy of wave motion in a medium to which the array is coupled is convertible to another form of energy. The device is suitable for generating electrical energy from sea waves.

Abstract: A rotary machine with a deformable rhomb, includes a housing defining a stator for receiving a rotor which is a deformable rhomb in contact, with or without clearance, with the internal surface of the housing, the deformable rhomb including several pistons connected one after the other by a pivotal hinge having an axis parallel to the longitudinal axis of the housing and thus defining a closed chain; the internal surface of the housing of the machine defining an external cavity, with the exterior of the deformable rhomb, and with the lateral closure flanges of the housing, and an inner cavity being formed in the interior of the rotor with the lateral closure flanges of the housing; at least one of the external cavities and/or at least one of the inner cavities being connected, directly or indirectly, to the inlet of a fluid circuit external to the machine.

Abstract: Energy storage systems and methods use medium voltage (MV) electrical heat exchangers to increase the efficiency of the energy storage system and/or reduce emission of pollutants. MV electrical heat exchangers use medium range voltages to heat a fluid, such as a gas or liquid. The heated fluid is used in the energy storage system to either drive a turbine generator directly or indirectly, such as by generating steam to drive the turbine generator. The electricity used to power the MV electrical heat exchangers can be from renewable energy sources, such as solar or wind-powered sources, further increasing efficiency of the energy storage system.

Abstract: A control method for a turbocharger system may include a first intake line supplying outdoor air to an intake manifold, a turbocharger, a second intake line supplying fresh air to the compressor; a third intake line connecting the compressor and the first intake line; a throttle valve controlling a flow of air supplied from the first intake line and the third intake line; an intake bypass valve controlling a flow of air that flows in the first intake line; a first exhaust line; a second exhaust line; an exhaust bypass valve controlling a flow of the exhaust gas discharged from the first exhaust line; and a controller controlling opening levels of the intake bypass valve, the exhaust bypass valve, and the throttle valve according to a driving condition of a vehicle.

Abstract: The invention provides a method and system of detecting ice or other foreign matter on a wind turbine blade or damage to a wind turbine blade. The method in one aspect comprises: measuring twisting torque on the blade about its longitudinal axis to provide a detected torque signal; comparing a value based on the detected torque signal with a comparison value, the comparison value derived from one or more measured parameters having a predetermined relationship with the twisting torque about the longitudinal axis of the blade when the blade is operating under normal operating conditions; and determining that ice or other foreign matter is on the blade or that the blade is damaged if the value based on the detected torque signal differs from the comparison value by more than a predetermined amount. Wind turbine blades are designed such that any change in the shape of the blade reduces twisting torque on the blades significantly.

Abstract: A marine propulsion device has an internal combustion engine that discharges exhaust gases, a driveshaft housing that is located vertically below the engine, and a catalyst that is sandwiched between opposing castings of the device that face each other at a split-line. The exhaust gases flow through the catalyst parallel to the split-line.

Abstract: A gas turbine engine variable bleed apparatus includes a variable bleed valve door disposed in a bleed inlet in a transition duct, rotatable about two or more separate pivot points, operable to open and close an aft bleed slot extending outwardly from transition duct, and operable to open and close a forward bleed slot extending inwardly into transition duct. Door is operable to transition between a first position with aft bleed slot open and forward bleed slot closed to a second position with aft bleed slot closed and forward bleed slot open without fully closing door. Door is rotatable about an axis translatable between the two or more separate pivot points. Transition duct having a transition duct conical angle at least about 10 degrees greater than a booster conical angle of a booster outer shroud upstream of transition duct.

Abstract: An exhaust gas aftertreatment device provided to an upper portion of an engine includes a right and left pair of first and second aftertreatment units, into which exhaust gas from the engine dividedly flows, each including a first exhaust gas emission control system on an upstream side, a second exhaust gas emission control system on a downstream side and a communication pipe through which the first and second systems are in communication with each other, the first and second systems, while being arranged side by side in a right-and-left direction, being oriented so that a flow direction of the exhaust gas flowing therein is parallel with a front-and-rear direction. When the device is seen in the front-and-rear direction, an outer linear envelope tangent to the first system and the communication pipe of each of the units extends upward while tilting toward a right-and-left center of the engine.

Abstract: Systems, methods and techniques for exhaust gas recirculation are provided. The system includes controlling the mixing of exhaust flow from at least one cylinder of an engine with air in an air intake system prior to combustion in response to an EGR fraction deviation condition. The exhaust flow from the at least one cylinder is accumulated prior to mixing and distributed into the intake air system in a controlled manner to mitigate or prevent the EGR flow from deviating from an expected EGR fraction.

Abstract: An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passageway, a reduction catalyst, a reductant injector, and a controller. The controller may have a NOX/reductant relationship map, and be configured to receive a first input relating to an amount of NOX within the exhaust passageway upstream of the reduction catalyst, and reference the NOX/reductant relationship map to determine an initial amount of reductant that should be directed into the exhaust passageway based on the first input. The controller may also be configured to receive a second input relating to performance of the reduction catalyst, determine an adjustment to the initial amount of reductant based on the second input, and regulate operation of the reductant injector to direct an adjusted amount of reductant into the exhaust passageway. The controller may further be configured to update the NOX/reductant relationship map based on the determined adjustment.

Abstract: A variable displacement pump includes an urging mechanism to urge a cam ring in an eccentric direction and to increase the urging force when an eccentricity is decreased, a first control chamber to apply a force to the cam ring in a direction decreasing the eccentricity, and a second control chamber to apply a force, to the cam ring, in a direction increasing the eccentricity. The variable displacement pump further includes a thermosensitive mechanism to control the supply and drain of a discharge pressure supplied into the second control chamber, and a control valve to be operated by the discharge pressure and to decrease the pressure in the second control chamber when the discharge pressure increases.