Abstract: A steam turbine includes: a rotor shaft including a shaft core and a disk portion fixed to the shaft core and that expands toward a radially outer side in the shaft core; rotor blade rows that are fixed to an outer periphery of the disk portion and arranged in an axial direction in which the shaft core extends; a stator vane row adjacent to an upstream side of the rotor blade row in the axial direction for each of the plurality of rotor blade rows; a gap flow passage that extends toward a radially inner side from a steam main flow passage that extends in the axial direction; and a communication passage including a first end that communicates with the gap flow passage and a second end that communicates with a space where steam with higher pressure than pressure of the steam inside the gap flow passage exists.

Abstract: An engine cooling device includes a heater circulation passage including an exhaust-side channel and a heater channel, the exhaust-side channel extending through an exhaust port-side portion of a cylinder head, the heater channel extending through a heater core; an auxiliary device circulation passage including a main channel and an auxiliary device channel, the main channel extending through a portion of the cylinder head other than the exhaust port-side portion, the auxiliary device channel extending through an auxiliary device; a temperature detecting portion configured to detect a temperature of an engine; and a channel switching valve configured to perform connection between the main channel and the auxiliary device channel and connection between the heater circulation passage and the auxiliary device circulation passage depending on the detected temperature falling within one of three temperature ranges.

Abstract: An apparatus and method of controlling the position of a variable vane in a compressor and a kit for adding such apparatus to the compressor are disclosed. The vane is coupled to a unison ring, a cam is secured to a torque tube, a cam follower is secured to the unison ring. The cam follower is secured such that a wall of the cam follower is in contact with the cam. Rotation of the torque tube causes movement of the cam, and movement of the cam moves the cam follower, thereby moving the unison ring and the variable vane coupled thereto.

Abstract: A lightning current transmission system in a wind turbine between a metal band located at the root of each blade and a metal ring located at the nacelle through a lightning current transmission element comprising a conductive portion, an insulating portion and a supporting unit to be joined to the rotor hub. The metal band and the metal ring are configured with protruding parts extended towards the lightning current transmission element. The conductive portion of the lightning current transmission element comprises first and second receptors mounted on a base plate at different heights and oriented in a direction pointing, respectively, to the protruding parts of the metal band and the metal ring.

Abstract: A fuel injector for an internal combustion engine is disclosed. The fuel injector is installable in a cylinder head bore of a cylinder head of the engine and has a body region arranged to be received within the cylinder head bore, and a head region arranged to extend outside the cylinder head bore to protrude from the cylinder head when the injector is installed in the cylinder head bore. The injector includes a first valve needle arranged to control the injection of a gaseous fuel from a first outlet, a second valve needle arranged to control the injection of a liquid fuel from a second outlet, a gaseous fuel inlet for admitting the gaseous fuel to the injector, and a liquid fuel inlet port for admitting the liquid fuel to the injector. The gaseous fuel inlet is disposed in the body region of the injector, and the liquid fuel inlet port is disposed in the head region of the injector. The injector can also include an internal accumulator volume so that an external fuel rail is not necessary.

Abstract: The present disclosure relates to a piston for a reciprocating-piston internal combustion engine, comprising a piston head and a piston barrel, wherein the piston head has an encircling ring belt with at least one ring groove for a piston ring and has, in the region of the ring belt, an encircling cooling duct. The cooling duct extends from the ring belt as far as a wall of the piston barrel in order to increase an oil film temperature of the oil film in the cylinder liner between the piston barrel and cylinder and to thereby reduce the piston barrel friction.

Abstract: Disclosed herein is an inventive dual propeller assembly that can be manually or automatively assembled and includes a leading propeller, and a trailing propeller which are coaxially aligned and secured with a propeller shaft and a locking nut. Various embodiments are disclosed with and without interior grooves for alignment. In all embodiments, the two propellers are secured and aligned with a propeller shaft and locking nut assembly.

Abstract: A casing including: a first casing section and a second casing section configured to be joined to the first casing section to form the casing; a first hole extending through a portion of the first casing section; a second hole extending through a portion of the second casing section, wherein the first and second holes are configured to be in alignment while the first and second casing sections are joined; a bushing seated in the second hole; a fastener having a shaft configured to extend through the first hole, extend into the second hole, and seat in and engage the bushing, wherein a thermal expansion coefficient of the bushing is greater than a thermal expansion coefficient of the shaft of the fastener, and the thermal expansion coefficient of the fastener is greater than a thermal expansion coefficients for each of the first and second casing sections.

Abstract: A compressor stage of a gas turbine engine is provided. The compressor stage has a circumferential row of static vanes and a radially outer casing. Each vane has a radially outer and forwardly projecting front tenon which on build of the compressor stage is received into a first recess of the casing. Each vane also has a radially outer and rearwardly projecting rear tenon which on build of the compressor stage is received into a second recess of the casing. Each vane further has a baulking tab adjacent one of the front and the rear tenons. The casing has a respective baulking land adjacent the recess into which the other of the front and the rear tenons is received. The baulking tab and the baulking land are configured such that if the vane is attempted to be installed in the stage back-to-front, the baulking tab interferes with the baulking land to prevent completion of the build of the compressor stage.

Abstract: A coolant circuit has an engine cooling circuit in which coolant can be circulated in order to cool an internal combustion engine via a cylinder head cooling circuit and a crankcase cooling circuit separated from the cylinder head cooling circuit. The coolant circuit includes a transmission cooling circuit for cooling a transmission, the transmission cooling circuit branching off from the engine cooling circuit. A valve is arranged in the transmission cooling circuit. A controller is designed to open and close the valve depending on an operating state of the internal combustion engine and/or the transmission. In particular, the transmission cooling circuit branches off from the crankcase cooling circuit to a section along which the crankcase cooling circuit is separated from the cylinder head cooling circuit.

Abstract: A method adapts an energy supply of a vehicle drive system, where values of at least a first energy utilization characteristic variable which represents a first energy utilization process in the vehicle are determined, and values of at least one parameter which represents at least one peripheral condition of the energy utilization during the first energy utilization process are determined. A mathematical relationship is determined between these values, after which a profile data record is made which contains a data record and/or learning data on the basis of the mathematical relationship. As a function of the profile data record, at least one adaptation information item for adapting the energy supply of the drive system of the vehicle for a second energy utilization process is determined, and/or an adaptation information item for adapting the energy supply of the drive system of a second vehicle for an energy utilization process is determined.

Abstract: A rotor disk assembly may include a rotor disk and a retention ring coupled to the rotor disk. Generally, the retention ring is tuned to adjust a modal frequency response of the rotor disk/rotor disk assembly. In various embodiments, dimensions of the retention ring vary circumferentially. In various embodiments, the retention ring includes an axially extending flange and a radially extending flange. A radial thickness of the axially extending flange may vary circumferentially and/or an axial thickness of the radially extending flange may vary circumferentially.

Abstract: A coolant control system of a vehicle includes an opening module configured to determine a coolant valve (CV) opening, a flow control valve (FCV) opening, and a block valve (BV) opening based on at least one of a block temperature difference, a head temperature difference, and a coolant outlet temperature difference. A CV control module is configured to selectively actuate a CV based on the CV opening. The CV regulates coolant flow from the FCV to a radiator and a coolant channel bypassing the radiator. A BV control module is configured to selectively actuate a BV based on the BV opening. The BV regulates coolant flow from the engine block to the FCV. A FCV control module is configured to selectively actuate a FCV based on the FCV opening. The FCV regulates coolant flow from the cylinder head and the BV to the CV.

Abstract: An airfoil with dual wall cooling for a gas turbine engine comprises a spar having pressure and suction side walls that meet at leading and trailing edges of the airfoil, with a tip extending therebetween. An interior of the spar includes a coolant cavity, and each of the pressure and suction side walls includes an arrangement of pedestals on an outer surface thereof and a plurality of cooling holes in fluid communication with the coolant cavity. A pressure side coversheet overlies the pressure side wall and terminates in a radial direction short of the tip of the spar to form a shelf extending along a chordal direction. Flow channels between the pressure side wall and coversheet are configured to direct coolant from the cooling holes to radial flow outlets adjacent to the shelf. A suction side coversheet overlies the suction side wall, and a coolant circuit between the suction side wall and coversheet does not include radial coolant outlets.

Abstract: A current control unit in a fuel injection device controls a magnitude of a current flowing through a coil during single energization. A current Ip1 flows once a signal input to the current control unit is turned ON at time t11. As a result, a movable core and a needle abut against each other with a lift amount increased at time t12, and then the needle is separated from a valve seat and pre-injection is performed. At time t13, which follows the pre-injection, the needle and movable core lift amount becomes a lift amount D1 at a time when the needle and the valve seat abut against each other, and temporary valve closing occurs. At time t14, which follows time t13, currents Ix1 and Im1 larger than the current Ip1 are caused to flow through the coil, and then main injection is performed with the needle and movable core lift amount turned into a lift amount D2 larger than the lift amount D1. Therefore, fuel injection can be performed twice during the single energization.

Abstract: A galleryless piston having a reduced temperature during operation in an engine is provided. The piston includes an upper wall with an exposed undercrown surface. A ring belt and pin bosses depend from the upper wall, and a pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. The piston includes an inner undercrown region and outer pockets extending along the undercrown surface. The inner undercrown region is surrounded by the skirt panels, the struts, and the pin bosses. Each outer pocket is surrounded by one of the pin bosses, a portion of the ring belt, and the struts adjacent the one pin boss. A plurality of holes extend through the pin bosses and/or the struts from the inner undercrown region to one of the outer pockets to convey cooling oil from the inner undercrown region to the outer pockets.

Abstract: A method is provided for controlling a gear change in the case of a non-synchronized dog-shift transmission having at least one shift fork controllable by way of a selector drum, wherein, by way of a position sensor on the selector drum, the rotational position of the selector drum is sensed and is transmitted to an electronic control unit for controlling a drive motor. By use of the sensed rotational position, the control unit detects whether the/a shift fork is in an intermediate position, in which none of the two possible gears associated with the shift fork is engaged. If the shift fork is in the intermediate position, the rotational speed of the drive motor is controlled to a middle value between the target rotational speeds of the two possible gears if in addition the clutch between the drive motor and the dog-shift transmission is open.

Abstract: Provided is an engine with a starter valve arranged in a compact space and with a cylinder head having a cooling water passage and a starter valve feeding compressed air to a combustion chamber. The starter valve is arranged parallel in the axial direction to a cylinder while fitted into a sleeve, and a portion of the cooling water passage is formed by the outer surface of the sleeve fitted into a starter valve insertion hole formed in the cylinder head. A starting air passage orthogonal to the axial direction of the starter valve insertion hole is formed in the cylinder head, and a portion of the wall surface of the starting air passage is formed by the end surface on one side of the sleeve.

Abstract: An oil mist separation mechanism of an internal combustion engine includes an oil mist separation portion being integrally provided with an internal combustion engine main body at an outer surface thereof, the oil mist separation portion for separating an oil mist included in a blow-by gas sent from the internal combustion engine main body, and an oil returning portion being connected to the oil mist separation portion, the oil returning portion returning an oil separated by the oil mist separation portion to an oil stored at a lower portion of the internal combustion engine main body.

Abstract: A gasoline compression ignition engine, a vehicle and a method of operating a gasoline compression ignition engine. An inlet air management system includes a membrane-based separator and an exhaust gas recirculation flowpath that cooperate to deliver a nitrogen enriched air stream to the engine to help reduce exhaust gas emissions. The separator segregates the incoming air into the nitrogen enriched air stream as well as an oxygen enriched air stream such that the latter can be used for various engine load conditions, as well as for supplemental air for a cabin or related passenger compartment within a vehicle that is powered by the engine.