Abstract: Provided is a two-stroke internal combustion engine, including: a fuel injection valve configured to supply a fuel into a crank chamber; an intake passage configured to allow only air to be sucked thereinto under a negative pressure generated when a piston is actuated; and a scavenging passage that allows communication between the crank chamber and a combustion chamber. Further, air passing through the intake passage is introduced into the scavenging passage, and air stagnant in the scavenging passage at end of air suction contributes to scavenging.

Abstract: An oil sump housing for an outboard motor of a marine vessel is provided. The oil sump housing includes an upper mounting flange including multiple upper mounting holes, a lower mounting flange including multiple lower mounting holes, and an inner housing wall and an outer housing wall extending between the upper mounting flange and the lower mounting flange. The inner housing wall defines a transmission mounting cavity, and the inner housing wall and the outer housing wall define an oil containment cavity that at least partially surrounds the transmission mounting cavity.

Abstract: A cantilever fan including a blade and a blade permanent magnet. The blade is clamped at one end to a base and has a distal end which is free to oscillate with distal end having the largest swept displacement of any portion of the blade. The blade extends from the clamped end to the distal end. The blade permanent magnet is attached only to the blade at a point along the blade's length and is free to move with the blade. The fan includes a stationary permanent magnet attached only to the base. The respective locations and relative orientation of the blade permanent magnet and stationary magnet result in a repulsive magnetic force between the blade permanent magnet and stationary magnet. The fan is configured so that the repulsive force increases as the blade's deflection brings the blade permanent magnet closer to the stationary magnet.

Abstract: The present invention relates generally to facilities and systems capable of initiating and maintaining vertical flow, upward, within an extended-length water column by inducing changes in density throughout the column. Specifically, the induced (vertical) flow of water within an extended water column that is the present invention is accomplished through fluid aeration, with ambient air, which is directed toward producing ascending water flow rates sufficient to generate hydraulic pressure and hydraulic powered energy, through generated radial force in hydraulic turbines. It is another goal of this invention to utilize air infused water, derived from high-density and low depths, to create said vertical flow and induce turbine actuation through said unaltered, recyclable mediums—air and water—resulting in electrical power generation and desalination.

Abstract: Disclosed is a fan frame. The fan frame includes a frame body, a PIN body embedded in the frame body, and an outlet body connected to one end of the PIN body; and an accommodation cavity is provided in the frame body, the PIN body is embedded in the accommodation cavity, and the other end of the PIN body is connected to a circuit board. By designing the fan frame, automatic assembly on the circuit board is facilitated, connection to a test fixture is convenient, manually connecting the wires one by one for tests is avoided, and automatic tests, and simple, convenient and quick operation are achieved.

Abstract: An engine for a vehicle. The engine includes a cast engine block having a hybrid insert disposed in a fastener bore having rolled internal threads. The hybrid insert includes an internal surface having cut inner diameter (ID) threads and an external surface having rolled outer diameter (OD) threads. The rolled OD threads of the hybrid insert are received in the rolled internal threads of the fastener bore. The hybrid threaded insert may include a bi-metal in which the ID threads are formed of one metal alloy and the OD threads are formed of another metal alloy. Alternatively, the external surface of the hybrid insert may define locking features and the engine block is cast onto these locking features, thereby locking the hybrid insert to the engine block.

Abstract: An internal combustion engine includes an engine block, a piston, a cylinder head, and a valve train. The engine block includes a cylinder block including a cylinder bore and a crankcase defining a crankcase chamber with a crankshaft positioned within the crankcase chamber. The piston is coupled to the crankshaft and configured to reciprocate within the cylinder bore. The cylinder head is coupled to the cylinder block. The valve train includes a camshaft, a first and second pushrod, a first and second rocker arm, an exhaust valve housed, and an intake valve. The first rocker arm, the second rocker arm, the exhaust valve, and the intake valve each include at least a layer of a low friction material. The first and second pushrod each pass through a pushrod seal to prevent fluid from reaching the rocker chamber to fluidly isolate the rocker chamber from the crankcase chamber.

Abstract: A centrifugal fan sucks in air from one side in an axial direction and blows out air outward in a radial direction. A blade leading edge is connected to a cylinder inner surface of a side plate. The blade leading edge has: a tip end extended linearly by an apex of a convex surface and connected to the cylinder inner surface; and a convex surface end indicating a boundary between the convex surface and a side surface of the blade. When the cylinder inner surface has: a diameter ?a at a first position, which is an end position of the upstream tubular portion of the side plate on one side in the axial direction, a diameter ?b at a second position where the blade leading edge is connected; and a diameter ?c at a third position where the convex surface end is connected, a relationship of ?a??b??c is satisfied.

Abstract: Disclosed are a compressor, which is a cantilever type that is easy to manufacture and assemble, and is capable of minimizing the vane tip clearance as the elastic member absorbs the impact and is compressed when the vane collides with the shroud segment due to expansion of the vane, and a gas turbine including the same.

Abstract: A turbomachinery includes a casing, a rotor shaft rotatably attached to the casing, a first blade row fixed to either one of the rotor shaft or the casing, and a second blade row fixed to either one of the rotor shaft or the casing and arranged adjacent to the upstream side or downstream side of the first blade row, wherein the turbomachinery sets the number of first blades and the number of second blades in a manner that the interblade phase angle difference of the second blade row is ±180°.

Abstract: An vertical transportation elevator, escalator, dumbwaiter and lift systems monitoring, maintenance, repair, inspection, testing and modernization system and method is provided. The system and method may provide real-time information to a technician, buildings, property managers, facility managers, owners of building, building engineers, regarding the current state of the equipment, status of inspections, status of testing, repairs, modernization history of maintenance real time maintenance performed on equipment and characteristics of the equipment, and future requirements of the elevator.

Abstract: A hydrogen storage system includes: a first hydrogen tank provided in a fuel cell electric vehicle; a second hydrogen tank provided in the fuel cell electric vehicle and configured to store hydrogen independently of the first hydrogen tank; a manifold provided in the fuel cell electric vehicle and connected to the first hydrogen tank and the second hydrogen tank; a hydrogen supply line configured to connect the manifold and a fuel cell stack provided in the fuel cell electric vehicle; and a flow rate adjusting valve configured to adjust a flow rate of the hydrogen to be supplied to the manifold from at least one of the first hydrogen tank or the second hydrogen tank in accordance with a difference in pressure between the first hydrogen tank and the second hydrogen tank, so as to minimize a difference in pressure between the hydrogen tanks to improve safety and reliability.

Abstract: A filter assembly including: a first filter medium that is bent so that high-point portions and low-point portions defined based on a vertical plane with respect to a first direction are alternately and repeatedly formed in a second direction perpendicular to the first direction; a first filter frame configured to accommodate the first filter medium and to fix an edge side of the first filter medium; a second filter medium that is bent so that the low-point portions and the high-point portions based on the vertical plane with respect to the first direction are alternately and repeatedly formed in the second direction; and a second filter frame configured to accommodate the second filter medium and to fix an edge side of the second filter medium, wherein at least a portion of the high-point portions repeatedly formed in the first filter medium have different heights from those of the other high-point portions, and at least a portion of the low-point portions repeatedly formed in the second filter medium have d

Abstract: A cylinder head [20, 120] mountable onto a cylinder block [16] of an engine [10] is disclosed. The cylinder head [20, 120] includes at least one fastener boss [28, 128] configured for receiving a fastener [24], and the cylinder head [20, 120] is securely fastened onto the cylinder block [16] of the engine [10] by the fastener [24]. A boss cutout [30, 130] is formed on a lower portion of the at least one fastener boss [28, 128] that abuts the cylinder block [16] such that a contact pressure balance of sealing pressures around the cylinder block [16] is evenly distributed.

Abstract: A centrifugal fan includes a housing configured to accommodate an impeller. The impeller rotates relative to the housing. A flow channel that cooperates with the impeller is disposed in the housing. The flow channel includes a pressurization area, in which a static pressure and a flow velocity of an air flow are gradually increased along a rotation direction of the impeller. However, an air inlet is disposed on the housing, and there is a specific gap between the impeller and the air inlet. As a result, when air flows through the pressurization area, there is a specific amount of leakage through the gap. Therefore, an air baffle ring is disposed in the centrifugal fan provided in this application.

Abstract: A motor assembly comprises a stator, a rotor configured to be rotated about a shaft by electromagnetically interacting with the stator, an impeller configured to be rotated with the rotor about the shaft by being coupled to the rotor and configured to suction air in response to a rotation, a housing configured to cover between the impeller and the stator by being coupled to the stator, a cover comprising an inlet through which air sucked by the impeller is introduced, and configured to cover the impeller, a guide member configured to guide the air discharged from the impeller and configured to be coupled to the housing, and a plurality of first vanes protruding from one of the cover and the guide member to an axial direction and coupled to the other of the cover and the guide member.

Abstract: The present disclosure relates to a piston for an internal combustion engine. The piston comprises a cover which at least partially covers a piston basehead of the piston. A heat-isolating air gap is formed between the cover and the piston basehead, which is fluidically connected to a combustion chamber and/or an upper side of the cover facing away from the heat-isolating air gap. The fluidic connection permits a fluid exchange to take place between the heat-isolating air gap and the combustion chamber. In this way, a pressure gradient can be reduced between the combustion chamber and the heat-isolating air gap. As a result, the cover is/can be kept thin without being deformed during combustion.

Abstract: An engine is provided with a cylinder liner that extends beyond the surface of the crankcase surrounding the cylinder. When the engine is oriented in an inverted V-block configuration, the extension of the cylinder liner provides a barrier to oil that can pool on the crankcase surface and otherwise enter the interior of the cylinder, absent such a barrier.

Abstract: A dust filter is configured to filter air drawn into a vehicle canister. The dust filter includes a first portion including a first engaging portion and a second portion including a second engaging portion. The second portion is attached to the first portion by engagement of the second engaging portion with the first engaging portion. The first portion includes a filtration member and a case. The case includes an inner chamber within which the filtration member is disposed. The case includes a drainage port configured to drain liquid that has infiltrated the inner chamber. The second portion is attached to the first portion to form a cover that covers the drainage port together with the first portion. The cover has an outlet that opens to the outside at a position lower than the drainage port.

Abstract: Linear generators with a piston having a valve are described herein. The linear generator includes a combustion module and at least one linear motor. The linear motor includes at least one piston having: a piston head with an opening therein; a piston skirt opposed to the piston head; a piston side wall extending between the piston head and the piston skirt, the piston side wall having at least one port therein. The piston also includes a valve mechanism movable relative to each of the piston head, the piston seat and the piston side wall. The valve mechanism includes a valve stem extending through the piston skirt and the interior piston volume into a mover shaft of the motor, and a valve head coupled to the valve stem and configured to cover the opening of the piston head.