Abstract: Embodiments of the invention relate to incorporating one or more antennas or inductor coils into a semi-conductor package. A heat spreader or metal sheet is embedded in the package and stamped or otherwise patterned into a spiral or serpentine form. The pattern enables the spreader to function as an inductor or antenna when connected to a semiconductor chip in communication with a printed circuit board.

Abstract: An assembly configuration between a wind turbine rotor blade and a rotor hub includes a rotor hub having one or more pitch bearings, with each pitch bearing having an outer diameter race and an inner diameter race. Rotor blades are affixed to the respective pitch bearing rings, with the rotor blades having a root end with an outer diameter. An adaptor is configured between the root end and the pitch bearing, with the adaptor affixed to the inner diameter race and the root end affixed to the adaptor. The adaptor defines a mounting surface for the root end radially inward of the pitch bearing such that the root end outer diameter is less than the diameter of the inner diameter race.

Abstract: The present subject matter is directed to a rotor blade assembly and/or a joint assembly for a wind turbine blade. In one embodiment, the rotor blade assembly includes at least first and second blade segments connected together at a chord-wise extending joint, one or more shear-loaded pins configured through the chord-wise extending joint, and an anti-rotation locking feature. As such, the rotor blade assembly includes a maintenance-free bolted joint. The first blade segment has a body shell defining a generally aerodynamic profile. The body shell includes a suction side surface and a pressure side surface. The shear-loaded pin may extend in a generally flap-wise direction (i.e. from the suction side surface to the pressure side surface of the body shell) or in a generally chord-wise direction (i.e. from the pressure side to the suction side of the body shell).

Abstract: Embodiments of the invention relate to incorporating one or more antennas or inductor coils into a semi-conductor package. A heat spreader or metal sheet is embedded in the package and stamped or otherwise patterned into a spiral or serpentine form. The pattern enables the spreader to function as an inductor or antenna when connected to a semiconductor chip in communication with a printed circuit board.

Abstract: An assembly configuration between a wind turbine rotor blade and a rotor hub includes a rotor hub having one or more pitch bearings, with each pitch bearing having an outer diameter race and an inner diameter race. Rotor blades are affixed to the respective pitch bearing rings, with the rotor blades having a root end with an outer diameter. An adaptor is configured between the root end and the pitch bearing, with the adaptor affixed to the inner diameter race and the root end affixed to the adaptor. The adaptor defines a mounting surface for the root end radially inward of the pitch bearing such that the root end outer diameter is less than the diameter of the inner diameter race.

Abstract: A flange connection for two tower sections of a wind energy system is described. The wind energy system includes a first flange including a first portion and a second portion, and a second flange including a first portion and a second portion. The wind energy system further includes a first connecting element having substantially the shape of at least a segment of a ring and a second connecting element having substantially the shape of at least a segment of a ring. The first connecting element and the second connecting element are adapted for being connected to each other and are adapted for connecting the first portion of the first flange with the first portion of the second flange.

Abstract: A fluid dynamic polymer-based contact sensor measures ambient pressure based on the resistivity changes across the sensor under different ambient pressures. The pressure sensor may applied to airfoil structures such as wind turbine blades without impacting the blade structure and fluid dynamic characteristics. The sensor may also be applied to fluid measurements. The pressure measurements are used to measure blade performance with high fidelity. The pressure measurements are transmitted to processing to determine blade characteristics and environment including flow separation, stagnation point, angle of attack, lift and drag and wind speed. Further processing of the pressure distribution may identify wind shear, up-flow and yaw error.

Abstract: A fluid dynamic polymer-based contact sensor measures ambient pressure based on the resistivity changes across the sensor under different ambient pressures. The pressure sensor may applied to airfoil structures such as wind turbine blades without impacting the blade structure and fluid dynamic characteristics. The sensor may also be applied to fluid measurements. The pressure measurements are used to measure blade performance with high fidelity. The pressure measurements are transmitted to processing to determine blade characteristics and environment including flow separation, stagnation point, angle of attack, lift and drag and wind speed. Further processing of the pressure distribution may identify wind shear, up-flow and yaw error.

Abstract: An electric power generation system is disclosed, which includes a back-up electric power generator driven by a four-cycle internal combustion engine. The engine includes a plurality of reciprocating cylinders each rotatably coupled to a crankshaft, which drives the electric power generator. The engine also includes a compressor along an intake pathway to deliver pressurized air to the cylinders and a turbine along an exhaust pathway to power the compressor when driven by exhaust discharged from the cylinders. The engine is prepared to accept a generator load by increasing boost pressure provided by the compressor. This increase is accomplished by skip-firing the cylinders in a selected pattern, retarding ignition timing for the cylinders, or a combination of these techniques. A unique skip-fueling control pattern is also disclosed.

Abstract: A unitary combustion deck for an internal combustion engine includes a main body portion having a cylinder-facing surface and a coolant-side facing surface. The combustion deck further includes a plurality of bolt bosses which are integrally cast as part of the coolant-side surface and each bolt boss defines a bolt-receiving aperture which extends through the main body portion and which is designed to receive a mounting bolt for securing the combustion deck to a cylinder block for sealing against the leakage of combustion gases. Further included as part of the combustion deck is a load distribution rib which is constructed and arranged to extend in a ring-like form around the at least one cylinder while integrally connecting with each bolt boss of the plurality of bolt bosses.

Abstract: A unitary cylinder head casting for an engine includes a plurality of valve guide bore casting portions, each valve guide bore casting portion defining a valve guide bore and a plurality of head bolt bore casting portions, each head bolt bore casting portion defining a head bolt bore. The cylinder head casting is constructed and arranged such that there is at least one head bolt bore corresponding to each valve guide bore. The cylinder head casting also defines an upper water jacket and a lower water jacket. In order to eliminate fillets in the area of the upper water jacket which represent likely locations for fatigue cracks to initiate, gusset ribs are included as part of the cylinder head casting. There is at least one gusset rib extending between at least one combination of one head bolt bore casting portion and its corresponding valve guide bore casting portion.

Abstract: An assembly including an engine component, such as a fuel injector, seated against a seating surface of a cylinder head is provided with a positive seal contact an uppermost point of contact between an injector sleeve and a seating surface of the cylinder head. The positive seal contact prevents coolant from the water jacket from travelling below the uppermost point of contact, thereby avoiding cavitation damage which might otherwise occur by the entrapment of liquid between the cylinder head seating surface and the injector sleeve. In an embodiment, a raised annular ridge is formed in the seating surface of the cylinder head at the location of the uppermost point of contact. This ridge becomes embedded in the injector sleeve. Also, in an embodiment, the cylinder head includes a circular recess upwardly from the uppermost point of contact.

Abstract: A process is provided for simultaneously attaching surface-mount (SM) integrated circuit (IC) devices (12) and chip-on-board (COB) IC devices (22) to a circuit board (10) using a combined solder reflow and adhesive cure thermal cycle. The process generally entails placing SM and COB devices (12, 22) on the circuit board (10), such that a suitable solder composition (14) and adhesive (24) are present between the circuit board (10) and the SM and COB devices (12, 22), respectively. The circuit board (10) and devices (12, 22) are then heated so as to simultaneously cure the adhesive (24) and reflow the solder composition (14). A preferred heating step entails at least one thermal cycle that attains a peak temperature well above the cure temperature of the adhesive (24), as well as above the melting or liquidus temperature of the solder composition (14). Accordingly, the thermal cycle is employed to cure the adhesive (24) well outside its conventional cure limits.

Abstract: A process for depositing an encapsulating material (16) on and around a COB die (10) and other wire-bonded device, without producing voids that encourage premature fatigue fracturing of the material (16) and wires (14) that electrically connect the device (10) to a circuit board (12). The process generally entails mounting and wire bonding a die (10) to a circuit board (12) with multiple bond wires (14). The encapsulation material (16) is then deposited along a first edge (18) of the die, and sequentially along the remaining edges (20, 22, 24) of the die (10), each successive edge being contiguous with the preceding edge, until the entire perimeter of the die (10) is surrounded and contacted with the material (16). The encapsulation material (16) encapsulates only those portions of the wires (14) immediately adjacent the die (10), with the remainder of the wires (14) remaining exposed.

Abstract: An engine oil capacitor which allows a larger volume of oil to be used in an internal combustion engine without reducing fuel economy or increasing engine package size. Oil flow through the normal oil drainback holes is partially restricted, resulting in a substantial quantity of oil being temporarily stored in an engine compartment, such as the camshaft compartment, during engine operation.

Abstract: A system which receives a pseudonoise sequence signal quantizes the signal during a fixed interval of time and passes the quantized signal to a plurality of correlation channels. Each of the correlation channels rotates the incoming phase modulation at a different fixed rate to cancel out a corresponding component of offset frequency. The outputs of the correlation channels are examined to determine whether acceptable correlation has been attained and, if so, which channel provides the best frequency compensation.