Abstract: Splitter apparatus for gas turbine engines are disclosed. An example splitter apparatus may include a splitter including an annular outer wall substantially defining a convex leading edge; an annular splitter support positioned radially within the outer and including a forward end disposed substantially against a splitter inner; and an annular first bulkhead spanning between the outer wall and the splitter support. The outer wall, the splitter support, and the first bulkhead may define a generally annular splitter plenum. The forward end of the splitter support may include spaced apart, radially oriented metering slots. The outer wall may include an inner portion disposed radially inward from the splitter inner surface extending aft and including spaced-apart exit slots. The splitter plenum, the metering slots, and the exit slots may conduct airflow from the plenum, through the metering slots against the splitter inner surface, and through the exit slots.

Abstract: A filtration system and methods of assembly and operation are provided. The filtration system includes an array of perforated tubes in flow communication with a flow of intake air. Each perforated tube comprises a solids inlet and a solids outlet. The system also includes a solids feed system comprising a feed line coupled in flow communication with said solids inlet and configured to channel sorbent material through each perforated tube in said array. The filtration system also includes a monitoring arrangement for monitoring a parameter associated with the intake air, and varying the operation of the system based upon said parameter.

Abstract: A cooled gas turbine engine component comprises a wall which has a plurality of effusion cooling apertures extending there-through from a first surface to a second surface. The apertures are arranged at an angle to the second surface and each aperture has an inlet in the first surface and an outlet in the second surface. Each aperture has a metering portion and a diffusing portion arranged in flow series and each metering portion is elongate and the width is greater than the length of the metering portion. Each diffusing portion increases in dimension in the length from the metering portion to the outlet. Each outlet has a rectangular shape in the second surface of the wall. Each inlet has an elongate shape in the first surface of the wall and the inlet in the wall is arranged substantially diagonally with respect to the outlet in the wall.

Abstract: A mounting arrangement for an electrical harness comprises an elongate tray, the tray having a base and raised sides to define a channel. The electrical harness is mounted within the channel and cooling air is directed into the channel to cool the electrical harness.

Abstract: A system for modulating air flow in a gas turbine engine is provided. The system may include a seal wall comprising an opening, a seal door configured to slideably engage the seal wall, and an actuator configured to move the seal door over the opening. In various embodiments, the system may include a surface forward of the seal door. The seal door may be configured to seal a passage through the surface and the opening of the seal wall. A track may be disposed under the seal door. The track may comprise cobalt. Rollers may be coupled to the seal door with the rollers on the track. The seal door may comprise a nickel-chromium alloy. A sync ring may be coupled to the seal door. The actuator may be coupled through the sync ring to the seal door.

Abstract: The described accessory drive system for a gas turbine engine includes a gearbox driving a plurality of accessories including a cabin air compressor to provide cabin air and an engine starter to start the gas turbine engine. An electrical power supply separate from a main electrical power supply of the gas turbine engine is electrically coupled to the accessories. A clutch selectively engages an output of the gas turbine engine to mechanically couple the output to the gearbox. The clutch operates between an electrical drive state where it disengages from the output and only the electrical power supply provides electrical power to the cabin air compressor and the engine starter, and a mechanical drive state where the clutch engages the output and the gearbox drives at least one of the accessories.

Abstract: A gearbox adapted for use with a gas turbine engine and a method for making the same are disclosed herein. The gearbox comprising a housing made from a magnesium alloy, and an aluminum oxide coating on the magnesium alloy housing. The aluminum oxide coating may inhibit corrosion of the housing, and may have a nano-microcrystalline structure that defines an inner region bonded directly to the housing and an outer region spaced apart from the housing.

Abstract: A geared architecture for a gas turbine comprising an output shaft for connection with a fan, an input shaft and a gearbox connecting the input shaft with the output shaft. The gearbox has a forward planet carrier plate supported by a forward radially fixed bearing structure and a rearward planet carrier plate supported by a rearward radially fixed bearing structure. By supporting the carrier plates on radially fixed bearing structures the planet carriers can rotate about their own axis to lower vibration and mesh forces within the gearbox.

Abstract: A geared architecture for a gas turbine comprising an output shaft for connection with a fan, an input shaft and a gearbox connecting the input shaft with the output shaft. The gearbox has a forward planet carrier plate supported by a forward radially fixed bearing structure and a rearward planet carrier plate supported by a rearward radially fixed bearing structure. By supporting the carrier plates on radially fixed bearing structures the planet carriers can rotate about their own axis to lower vibration and mesh forces within the gearbox.

Abstract: Various systems and methods are provided for controlling the temperature of outlet gasses from a throttle bypass turbine. In one embodiment, a method of operating a throttle bypass turbine comprises controlling a temperature of outlet gas flowing out of the turbine by routing the outlet gas through an exhaust gas recirculation heat exchanger positioned in an exhaust gas recirculation passage, the turbine coupled to an intake passage.

Abstract: An internal combustion engine includes a cylinder block defining a cylinder, a cylinder head, an intake valve, an exhaust valve, and a variable exhaust valve timing mechanism. The engine also includes a turbocharging system configured to pressurize ambient airflow for delivery to the cylinder. The turbocharging system includes a low-flow turbocharger, a high-flow turbocharger, and a flow control device for selectively directing post-combustion gas to the low-flow and high-flow turbochargers. A controller directs the post-combustion gas to the low-flow turbocharger and selects a first predetermined exhaust valve timing when the engine operates below a predetermined speed and above a predetermined load. Alternatively, the controller directs the post-combustion gas to the high-flow turbocharger and selects a second predetermined exhaust valve timing at or above the predetermined engine speed.

Abstract: Methods and systems are provided for reducing idling torque imbalances between cylinders by actuating a common camshaft to which the cylinders are coupled. The camshaft may be adjusted within camshaft limits during each combustion event of each cylinder. In this way, idling NVH issues may be addressed.

Abstract: In a method and a device for operating an internal combustion engine, with at least one cylinder (Z1-Z4) having a combustion chamber (26), fuel is injected into the cylinder and a logic value (LV_FCUT) is set, in particular for stopping the injection of fuel into the cylinder, The method furthermore has the following steps: depending on a course of the highly time-resolved measurement signal of a rotational speed (N_FAST) of the internal combustion engine, a local maximum value (N_FAST_MAX) of the rotational speed is determined, a rotational speed difference (N_FAST_DIF) between the local maximum value (N_FAST_MAX) and a current measured value (N_FAST_MES) of the rotational speed is determined, and, depending on the determined rotational speed difference (N_FAST_DIF), the logic value (LV_FCUT) is set.

Abstract: A method for controlling a cooling system in a vehicle, may include an Exhaust Gas Recirculation (EGR) use determination step of determining whether to use EGR, a first coolant temperature management step of controlling a coolant temperature using a first coolant temperature map based on an output value reflecting engine operating conditions when driving the vehicle using the EGR, and a second coolant temperature management step of controlling the coolant temperature using a second coolant temperature map in which a coolant temperature of the second coolant temperature map may be set to be higher than a coolant temperature of the first coolant temperature map in a same engine operation region when driving the vehicle not using the EGR.

Abstract: An internal combustion engine mounted on a vehicle includes an exhaust passage provided with a catalyst. A controller for the internal combustion engine includes a processor. The processor is configured to perform an auto-stopping process on the engine when the engine is idling, perform an auto-restarting process on the engine when the engine is automatically stopped, correct an amount of fuel injected into the engine so that the fuel injection amount of the engine is increased by a correction amount after the auto-restarting process is started, and change the correction amount in accordance with an amount of oxygen stored in the catalyst at a point of time when the auto-stopping process is started.

Abstract: A method of operating a compression ignition engine uses an engine having a cylinder and a piston moveable in the cylinder. The method includes forming a combustible mixture by mixing generally homogeneously a first fuel and air and introducing this mixture into the at least one cylinder, and compressing the combustible mixture with the piston in a compression stroke. During the compression stroke but before start of combustion, a second fuel is added to the combustible mixture, thus creating a cylinder charge, the second fuel being easier to autoignite than the first fuel. The compression stroke is continued until combustion starts at those locations in the cylinder where concentration of the second fuel and/or temperature of the mixture is highest. A temperature of the cylinder charge and/or the amount of second fuel added to the combustible mixture is chosen such that a desired duration of combustion can be achieved.

Abstract: A controller for a diesel engine has a fuel injector which injects a fuel into a cylinder. The controller has a middle-combustion time computing portion which computes a middle-combustion time period that has elapsed from the fuel is injected until a half of the fuel has combusted, based on a detection value of a cylinder pressure sensor. Further, the controller has a fuel component computing portion which computes a ratio of a carbon quantity relative to a hydrogen quantity contained in the fuel based on the middle-combustion time period.

Abstract: A cylinder liner assembly is disclosed for use with an engine. The cylinder liner assembly may have a liner with a hollow, generally cylindrical body extending from a top end to a bottom end along a longitudinal axis. The cylinder liner assembly may also have a seal disposed around the liner at the top end and an anti-polishing ring disposed within the top end of the liner. The anti-polishing ring may have an annular groove formed on an outer surface to provide an air gap between the anti-polishing ring and the liner. The annular groove may axially overlap at least a portion of the seal.

Abstract: A cylinder head located between a cylinder block and a head cover includes a cam chamber arranged in an upper portion of the cylinder head and opening toward the head cover, a projection projecting from a bottom surface of the cam chamber toward the head cover and including an injector insertion hole, and a seating surface arranged in the bottom surface of the cam chamber and receiving a valve spring. The projection includes a top surface defining an injector seal surface around the injector insertion hole. The projection includes a first portion and a second portion separated from the seating surface by different distances along the bottom surface. The distance of the second portion from the seating surface is longer than that of the first portion. A side surface of the first portion is set to have a smaller draft angle than a side surface of the second portion.

Abstract: A steel piston with an oil gallery, and process for forming a steel piston oil gallery channel, which corresponds to the complex shape of the combustion bowl in the piston crown. The piston crown is made by a cast metal or powder metal forming process. The oil gallery channel is formed to the basic shape that corresponds to the shape of the walls of the combustion bowl. Machine-turning surfaces in the oil gallery channel can be machine-finished as desired. Surfaces in the oil gallery which cannot be machined with conventional turning operations, such as recesses and protrusions into the channel, are left in the original as-formed condition.

Abstract: The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall 2, a gas venting port 10 is formed below and adjacent to a scavenging port 6a. The gas venting port 10 is independent from the scavenging port 6a, and is opened/closed by a piston as each of an air port 4a and the scavenging port 6a is. Upon a piston groove 8 being brought into communication with the gas venting port 10 as a result of the piston moving up (FIG. 1(II)), blown-back gas in a piston groove 8 can move to a crankcase through the gas venting port 10. Along with this, air can enter the piston groove 8 from the air port 4a.

Abstract: The efficiency of charging air to a scavenging channel is enhanced by generating a gas flow in a piston groove simultaneously with the piston groove coming into communication with an air port. A piston groove 8 formed in a peripheral surface of a piston includes a pressure transmission through hole 10, and the pressure transmission through hole 10 consistently communicates with a crankcase. In the course of the piston moving up, upon a pressure in the crankcase becoming negative, the negative pressure in the crankcase affects the piston groove 8through the pressure transmission through hole 10. Consequently, a pressure in the piston groove 8 is released to the crankcase through the pressure transmission through hole 10. Upon the piston moving up and the piston groove 8 being thereby brought into communication with the air port 4a, air enters the piston groove 8 through the air port 4a ((III) of FIG. 1).

Abstract: A turbocharger for an engine is disclosed having a compressor and a turbine mounted remotely from one another on opposite sides of a major structural component of the engine. As one example, an engine system comprises a cylinder block and a turbocharger including a compressor and turbine rotatably coupled via a drive shaft, where the compressor and turbine are positioned on opposite sides of the cylinder block relative to a crankshaft axis. Further, the drive shaft traverses the cylinder block and is rotatably supported at each end by a bearing supported by a part of the cylinder block.

Abstract: An actuation system for a gas turbine engine oriented about a centerline includes a translating ring, at least one hydraulic actuator, and at least one electric actuator. The translating ring is oriented about the centerline and configured to move axially along the centerline. The at least one hydraulic actuator is configured to provide a first mechanical force to move the translating ring along the centerline. The at least one electric actuator is configured to provide a second mechanical force to move the translating ring in the axial direction. The at least one electric actuator is controlled to provide the second mechanical force upon determination of an operating condition.

Abstract: An apparatus and method are provided for a fuel bowl to supply liquid fuel to a carburetor. The fuel bowl comprises a float chamber and a fuel inlet cavity which receives a fuel delivery insert. The fuel delivery insert receives a fuel inlet valve and comprises passages to direct incoming fuel to a bottom portion of the float chamber. A float comprises an elongate member rotatably hinged within a float cavity of the fuel delivery insert, such that the float rises according to a quantity of fuel within the float chamber. The fuel inlet valve supplies liquid fuel to the float chamber by way of the passages according to the operation of the float within the float chamber. A ventilation chamber allows air and fuel vapors to exit as liquid fuel enters the float chamber while preventing liquid fuel from entering into the carburetor.

Abstract: A vehicle includes an internal combustion engine (ICE) to provide motive power to the vehicle. The ICE includes a pressurizable tank defining a tank volume to contain a solution of a natural gas and a liquid fuel. The ICE has a refueling port in fluid communication with the tank volume to selectably interface with a refueling nozzle to receive the solution from the refueling nozzle. A fuel supply tube conveys the solution from the pressurizable tank to the ICE. A fuel injector is in fluid communication with the fuel supply tube and a combustion chamber of the ICE. In response to a level of the solution in the pressurizable tank, the fuel injector is to selectably inject a predetermined quantity of the solution or a predetermined quantity of a gaseous mixture into the ICE for combustion. The gaseous mixture includes a vapor and the natural gas evaporated from the solution.

Abstract: A mixed fuel supply system includes a dimethyl ether (“DME”) tank which stores DME, a DME supply path which supplies the DME and a light oil supply system. The DME supply path is connected to a transfer path between a feed pump and a fuel injection pump. The DME supply path includes a flow regulating valve, in which a supply amount QDME of the DME is approximately 10% of a total supply amount Qfuel of a fuel in weight ratio. The fuel is mixed in the transfer path and transferred to the fuel injection pump, and then injected from injectors.

Abstract: Disclosed is a turbocharged internal combustion piston engine system that includes a waste-heat recovery system. The waste-heat recovery system involves injecting heated water into the cylinders during combustion to increase engine power and efficiency and to reduce emissions. The engine can be a spark or compression ignition type of engine, and can utilize fuels including but not limited to diesel, natural gas, gasoline, and ethanol. The engine also includes a turbocharger that utilizes a turbine in the exhaust gas flow to provide power to a compressor in the intake air flow to pressurize the intake air and provide additional charge flow to the engine to increase engine output.

Abstract: A mechanism may include a housing with an inlet passage and an outlet passage joined to the inlet passage by a valve chamber. The valve chamber may contain a plurality of vanes. The vanes may be arranged to: substantially close flow between the inlet passage and the outlet passage; induce swirl between the inlet passage and the outlet passage in both a first direction and a second direction; and be positioned parallel to flow between the inlet passage and the outlet passage. Closing off flow from the inlet passage may enhance flow from an exhaust gas port to the outlet passage.

Abstract: Embodiments of the present disclosure may suppress conduction between an anode and a cathode caused by condensed water in an oil removal apparatus in which oil particles are collected in a filter disposed between the anode and the cathode. An insulating layer may be sandwiched either between the filter and at least one of the anode and the cathode of the bipolar electrode, or within the filter so as to extend in a flow direction of blow-by gas, and may have an insulating property so as to prevent condensed water generated when moisture in the blow-by gas condenses, from connecting the anode and the cathode of the bipolar electrode.

Abstract: An air filtration system comprises an airflow inverter valve, an internal diffuser and a cylindrical filtration element positioned between the airflow inverter valve and the internal diffuser. A frustoconical external diffuser is joined to the airflow inverter valve so as to at least partly surround the filtration element. If desired, the airflow inverter valve and the external diffuser may be built as a single monolithic member. In one example, the airflow inverter valve, internal diffuser, filtration element and external diffuser each have a central axis of rotation aligned along a common central axis of the air filtration system.

Abstract: An internal combustion engine having an intake air duct with a compressor, a throttle valve, and a crankcase ventilation device with a ventilation duct connected to a crankcase with a crankcase pressure regulating valve, the ventilation duct divided into a first ventilation duct branch connected to the intake air duct upstream from the compressor, and a second ventilation duct branch connected to the intake air duct downstream from the throttle valve. A pressure difference between the pressure in the crankcase or in the ventilation duct upstream from the crankcase pressure regulating valve on the one hand and the pressure in the ventilation duct downstream from the crankcase pressure regulating valve on the other hand is measured by, for example, a sensor, and an evaluation unit evaluates for a correct or incorrect functioning of the crankcase ventilation device and a corresponding item of information can be outputted.

Abstract: Methods and systems are provided for using a crankcase vent tube pressure or flow sensor for diagnosing a location and nature of crankcase system integrity breach. Integrated CVT pressure readings are used to diagnose disconnection of the CVT on the air intake side and distinguish from disconnection on the crankcase side. Use of integrated pressure readings allows for a more reliable and quicker diagnosis even at lower engine airflows.

Abstract: A plurality of cylinders are disposed in parallel in a vehicle width direction, a clutch chamber is disposed in either one of the right and the left in the vehicle width direction, an intake manifold, a fuel injection device, a throttle body, and an intake pipe are disposed between a cylinder assembly and an air cleaner in an upper part of a crankcase assembly. The throttle body is disposed on an opposite side in the vehicle width direction of the clutch chamber.

Abstract: A soundproof cover for a fuel pipe includes a cover body and a clip. The cover body covers a fuel pipe. The clip is coupled to the cover body and configured to hold the fuel pipe. The clip includes a clamp portion and a grip portion. The clamp portion is disposed inside the cover body and configured to hold the fuel pipe. The grip portion is coupled to the clamp portion and exposed to an outside of the cover body.

Abstract: To improve the accuracy of an injection amount by a fuel injection valve, the open/close operation of a valve body needs to be performed promptly. This requires a configuration in which, immediately after starting movement of a movable member, fluid force generated at a seat portion of the valve body is not transmitted. It is also required to suppress a cohesion phenomenon between an end surface of an anchor and an end surface of a fixed core and to prevent sticking. To solve this problem, an electromagnetic fuel injection valve has a configuration in which a valve body includes a second valve body configured to abut against an anchor at valve close, a first valve body that abuts against the anchor at valve open. The second valve abuts against a stroke stopper arranged on an inner periphery of a fixed core at a time of valve-open.

Abstract: An object of the present invention is to improve the exhaust emission for a fuel injection valve having a stepped injection hole constructed so that a small diameter portion and a large diameter portion are communicated with each other with a stepped portion intervening therebetween.

Abstract: Various technologies presented herein relate to enhancing mixing inside a combustion chamber to form one or more locally premixed mixtures comprising fuel and charge-gas with low peak fuel to charge-gas ratios to enable minimal, or no, generation of soot and other undesired emissions during ignition and subsequent combustion of the locally premixed mixtures. To enable sufficient mixing of the fuel and charge-gas, a jet of fuel can be directed to pass through a bore of a duct causing charge-gas to be drawn into the bore creating turbulence to mix the fuel and the drawn charge-gas. The duct can be located proximate to an opening in a tip of a fuel injector. The duct can comprise of one or more holes along its length to enable charge-gas to be drawn into the bore, and further, the duct can cool the fuel and/or charge-gas prior to combustion.

Abstract: In a nozzle plate, a portion of fuel flowing out from a fuel injection port of the fuel injection device is atomized by impinging on an interference body. At the same time, the flow of the portion of fuel is sharply bent and impinges on fuel which straightly advances and passes through a nozzle hole and an orifice thus turning the flow of fuel into a turbulent flow. Further, both end portions of the orifice form non-rounded sharpened corner portions. Hence, a liquid film of fuel injected from the corner portions and areas in the vicinity of the corner portions of the orifice is formed into a thin sharpened and pointed state whereby an end portion of the liquid film of fuel injected from the orifice is easily atomized due to a friction between the end portion of the liquid film of fuel and air.

Abstract: A flow control system for a fuel includes an adjustable speed control valve configured to control a flow of fuel. A variable area orifice is arranged upstream of the speed control valve and is configured to control the flow of the fuel to the speed control valve. A flow control system for a turbine fuel and a method of controlling fuel flow are also disclosed.

Abstract: A mobile compressed natural gas (CNG) pressure reducing choke and heater unit are mounted to a trailer. The trailer is towable to a location that does not have a sales pipeline of CNG. The CNG has already been processed and is stored in a compressed storage station facility. The CNG then flows through an inlet and through a series of valves and then through the choke. The choke on the trailer chokes down the pressure of CNG directly from a compressed tank, usually on a separate semi-tractor. CNG is then heated, and used on site. The CNG input to this system may come from two distinct sources such that the pressure reduction can continuously occur without any readily observable delay by the user. There are outlet ports to connect to a diesel engine converted to run on CNG.

Abstract: A vehicle control apparatus includes an engine configured to drive a vehicle; a starter configured to start the engine; a headlamp configured to radiate light in front of the vehicle; a battery configured to supply driving electric power to the starter and the headlamp; a brightness detection unit configured to detect a physical quantity corresponding to brightness around the vehicle; and a control unit configured to have the engine stop automatically when a predetermined stopping condition is satisfied, and to have the engine start automatically when a predetermined starting condition is satisfied. The control unit inhibits the engine from stopping automatically when the headlamp is lighted, and the physical quantity detected by the brightness detection unit is less than or equal to a predetermined threshold.

Abstract: A starting control device for an internal combustion engine is provided with a hard cranking device and a soft cranking device that are respectively capable of and incapable of cranking the internal combustion engine to a target idle rotation speed. The starting control device includes: a starting mode determination unit determining whether to carry out starting in a non-combustion pressure mode whereby starting is carried out with the hard cranking device, or in a combustion pressure combination mode whereby starting is carried out through cranking with the soft cranking device while using a combustion pressure generated by supplying fuel to the internal combustion engine in combination; and an intake air amount control unit making an amount of intake air during cranking differ between a case where starting is carried out in the non-combustion pressure mode and a case where starting is carried out in the combustion pressure combination mode.

Abstract: A method for energy ignition management of a spark-ignition engine includes receiving, by a controller, at least one ignition energy characteristic to affect control of at least one combustion cylinder. The method further includes controlling the at least one combustion cylinder via the controller. Controlling the at least one combustion cylinder via the controller includes adjusting the at least one ignition energy characteristic in response to at least one operating condition of the engine. The at least one ignition energy characteristic is a magnitude of one of a current or voltage of spark energy.

Abstract: A system, method, and engine control module for energy ignition management of a combustion engine. The method may be performed by the system or the engine control module. The method includes determining operating conditions of the combustion engine, setting ignition energy characteristics for a dedicated EGR cylinder and a non-dedicated EGR cylinder based on the operating conditions. The ignition energy characteristics include at least one of magnitude of energy, current, voltage, and ignition energy duration. At least one characteristic of the ignition energy characteristics for the non-dedicated EGR cylinder is different than a corresponding characteristic for the dedicated EGR cylinder. The method also includes energizing ignition aid plugs based on the ignition energy characteristics.

Abstract: A method for determining a level of spark plug fouling and providing an indication to change the spark plugs of an ignition system is provided. The method includes providing a dwell command on a control wire of an ignition system and generating an indication of a recommendation to change a spark plug of the ignition system based upon a current on the control wire.

Abstract: A system for generating electricity in a moving water environment, including a single point of contact securing mechanism in contact with a floor of the moving water environment, the securing mechanism comprising a weight and a cable, a pump including a bottom section mechanically coupled to the securing mechanism via the cable, the bottom section comprising a water input valve and a bottom water conduit, a top section slidably coupled to the bottom section, the top portion comprising a water output valve and a top water conduit receiving water from the bottom water conduit, a spring mechanism coupled to the bottom section and the top section, and a buoyancy device coupled to the top pump section.

Abstract: A high-torque turbine system receives and converts low to higher speed wind or airflow into mechanical work or electric power; consisting of a number of sail or airfoil blades or blade portions located near the outer periphery having extended moment arms for increased torque, that rotate around an center axis that is parallel to the airflow, wherein the blades receive wind directly, from a center deflector that directs wind received in the center outward to the blades, or from airflow directed externally from man-made, natural or structural sources, wherein the turbine system outputs mechanical work or electrical power.

Abstract: The Windraider process, the Wind Wing, and the Armstrong electrical generator are innovations in converting wind energy into electrical energy which show significant promise in improving the economic and ergonomic utility of wind power.

Abstract: A tower-like wind turbine, that is with vertical axis, comprising a cradle-like supporting structure (2) including and supporting a rotor with vertical axis (3), coaxial thereto, with a central shaft connected to an electric generator, wherein a rotor is provided extending between two horizontal bases (8, 13), the periphery thereof is connected by means of a crown of vertical axes (27) parallel to the central shaft (20), on each one a vertical blade being engaged apt to be rotated by 90° around its own axis; wherein the cradle-like supporting structure is swivelling so as to have the same up-wind and down-wind side, the cradle-like supporting structure comprising: a first device (A) (24) for rotating the blades arranged up-wind, to rotate by 90° the respective blades by changing the orientation thereof from tangential to radial; and a second device (B) (23) for rotating the blades arranged down-wind, to rotate by 90° the respective blades by changing the orientation thereof from radial to tangential; so that