Abstract: The described embodiments relate to improving efficiency of a low-profile cooling fan. In one embodiment, an impeller of the cooling fan includes a shroud which covers a central portion of the impeller, thereby allowing a central inlet portion of the blades to have an increased fan blade height when compared to a cooling fan constrained by minimum part tolerances between the fan blades and a portion of the fan housing. In some embodiments, the impeller includes splitter blades that can improve performance of the low-profile cooling fan.

Abstract: A piston crown is provided for a piston in an internal combustion engine arrangement that includes a cylinder, the piston crown having a piston bowl surface adapted for facing a combustion chamber in the cylinder, wherein the piston bowl surface including a circumferential rim portion, a floor portion connected to and surrounded by the circumferential rim portion, a plurality of circumferentially spaced protrusions in the circumferential rim portion, at least one spray impingement portion, located between two adjacent protrusions. The spray impingement portion includes a reflection surface, being defined by that each possible normal to the reflection surface is directed towards a central axis of the piston, and forming an angle being within a range of a constant angle ±10° with the central axis, wherein the constant angle is at least 50°.

Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.

Abstract: Methods and systems for supplying fuel to a diesel engine during a cycle of a cylinder are described. In one example, a cylinder is supplied fuel via two fuel injectors having different fuel flow rates. The two fuel injectors may be operated to provide pilot, main, and post combustion fuel injections during a cycle of a cylinder.

Abstract: A method for controlling activation of an ISG system is provided. The method includes obtaining a current vehicle location and determining whether the current vehicle location is within an ISG inhibition area. When the current location of the vehicle is within the ISG inhibition area, an ISG mode is automatically inhibited to prevent the engine from being turned off.

Abstract: Methods and systems are provided for drying a wet-fouled spark plug during engine flooding conditions. In one example, a method may include, reverse rotating the engine unfueled and activating a heating element of an exhaust catalyst to flow heated ambient air through the combustion chamber to dry the wet-fouled spark plug.

Abstract: Gas turbine engine components are provided which utilize an insert to provide cooling air along a cooled surface of an engine component. The insert provides cooling holes or apertures which face the cool side surface of the engine component and direct cooling air onto that cool side surface. The apertures may be formed in arrays and directed at an oblique or a non-orthogonal angle to the surface of the insert and may be at an angle to the surface of the engine component being cooled. An engine component assembly is provided with counterflow impingement cooling, comprising an engine component cooling surface having a cooling fluid flow path on one side and a second component adjacent to the first component. The second component may have a plurality of openings forming an array wherein the openings extend through the second component at a non-orthogonal angle to the surface of the second component.

Abstract: The present invention discloses a wind turbine yaw control method and system, the method comprising the following steps: establishing a reference model, giving the optimal yaw reference model different wind speeds for wind shift angles; using model reference adaptive control; getting the adaptive control input so that the difference between the actual yaw angle deviation of the wind and the optimal wind yaw angle deviation is at a minimum. The wind turbine yaw control method and system of the present invention can adaptively track the wind speed in different sections of the optimum wind yaw deviation, improve operating performance under the influence of factors such as wind direction measurement and bias of the yaw system in order to achieve maximum efficiency absorption of wind energy, as well as optimize wind turbine power generation to improve economic efficiency and the operation of the entire wind farm.

Abstract: A blockage determination portion 174 of a blockage detection system 30 determines that no blockage has occurred in a purge line 90, if a flow rate V of an inner fluid Fi exceeds a flow rate threshold THv while an internal pressure Pi of the purge line 90 is reduced from a first pressure value P1 to a second pressure value P2, for example. The blockage determination portion 174 determines that a blockage has occurred in the purge line 90, if the flow rate V of the inner fluid Fi falls below the flow rate threshold THv after the internal pressure Pi is reduced from the first pressure value P1 to the second pressure value P2.

Abstract: An ceiling fan comprising a motor system. The motor system is mounted around a motor shaft. The motor shaft couples to a downrod for suspending the ceiling fan from a structure. The motor shaft and motor are encased by a motor housing. The motor housing comprises hub arms for mounting a plurality of blade holders. The blade holders coupled to a plurality of blades rotatable about the motor during operation. The downrod comprises a wire disk mounting guy wiring to the downrod. A retention rod is utilized internal of the motor and downrod as a secondary retention method. An electrical connector is internal of the motor shaft and electrically couples to the stator to power the motor.

Abstract: An automatic shutoff system for a motor vehicle, the automatic shutoff system including a front suspension system disposed at a front portion of the motor vehicle, the front suspension system comprising at least one spring wrapped around at least one arm, at least one sensor disposed on the at least one arm to sense when the at least one spring has been jarred at a predetermined intensity, a curb jump detection system to receive at least one signal from the at least one sensor when the at least one spring has been jarred at the predetermined intensity, and to process the at least one signal to determine whether a curb has been jumped by the front suspension system, and a computer system to receive a signal from the curb jump detection system when the curb jump detection system determines that the curb has been jumped by the front suspension system, and to control a motor to shut off.

Abstract: Methods and systems are provided for adjust spark timing based on ambient humidity and transient tip-in parameters. In one example, a method may include, during a tip-in, retarding spark timing based on each of ambient humidity, peak air charge, and rate of change of air charge. As such, the spark timing retard may be higher at lower humidity levels, and the spark timing retard may be lower at higher humidity levels.

Abstract: A wind turbine blade includes a first blade segment and a second blade segment extending in opposite directions from a chord-wise joint. Each of the blade segments having a pressure side shell member, a suction side shell member. The blade further including a coupling component extending spanwise and structurally connecting the first blade segment and the second blade segment. A thermal actuation component is coupled to the coupling component and passively actuated in response to a change in thermal conditions so as to provide for aeroelastic tailoring and pitch control to the wind turbine blade.

Abstract: A fuel injector for an internal combustion engine is disclosed. The fuel injector includes a body defining an orifice. The orifice is configured to provide passage to a fuel into a combustion chamber of the internal combustion engine. The orifice includes an inlet port having a first oval shape and an outlet port having a second oval shape. The second al shape is orthogonal to the first oval shape. Moreover, a transition from the first oval shape to the second oval shape defines a stagnation plane, facilitating an exit of the fuel as a fan spray from the outlet port.

Abstract: A proprotor system for tiltrotor aircraft having a helicopter mode and an airplane mode. The proprotor system includes a hub and a plurality of proprotor blades coupled to the hub such that each proprotor blade is operable to independently flap relative to the hub and independently change pitch. In the airplane mode, the proprotor blades have a first in-plane frequency greater than 2.0/rev.

Abstract: An inner shroud segment may include an inner housing and an outer housing. The inner housing may have a radial curve centered relative to an axis with a radial wall and a bottom wall that define a first channel. The outer housing may have a first axial wall, a first circumferential wall, and a second axial wall that define a second channel. The outer housing may also be disposed within the first channel with the radial wall of the inner housing contacting the first axial wall, the first circumferential wall, and/or the second axial wall. A compliant material may be disposed within the second channel and coupled to the radial wall and the first axial wall, the first circumferential wall, and/or the second axial wall.

Abstract: A method of controlling a fuel injection quantity using a lambda sensor may include performing a lambda deviation learning mode by controlling a lambda deviation, due to a difference between a lambda model value and a lambda sensor measurement value, by a controller during engine combustion in which an engine RPM and a fuel injection quantity are detected, wherein, in the lambda deviation learning mode, a learning map is learned and is then updated by setting a fuel correction quantity depending on the lambda deviation as a learning value, and a fuel injection quantity is determined, in consideration of the fuel correction quantity depending on an RPM and a fuel quantity based on the updated learning map, and is output as an output value, so that the output value is applied to feedback control for a next fuel injection quantity.

Abstract: An internal combustion engine includes first and second power cylinders and an expander cylinder, and is configured to operate in an expander mode and a bypass mode by selectively fluidly coupling exhaust flow from the first and second power cylinders to the expander cylinder. Operation includes commanding a transition from the bypass mode to the expander mode, including retarding openings of intake valves of the first and second power cylinders to a LIVC position. Exhaust valves of the power cylinders are controlled to effect fluid flow to the expander cylinder, and opening of an outlet valve of the expander cylinder is controlled to a maximum advanced state. The openings of the intake valves of the first and second power cylinders are controlled to desired positions associated with engine operation in the expander mode.

Abstract: An apparatus for controlling the temperature of an oil cooler in a motor vehicle may include a temperature control arrangement. The temperature control arrangement may have a cold thermostat with a limit operating temperature and a warm thermostat with a lower limit operating temperature, the warm thermostat being connected in a fluid-connecting manner to the cold thermostat. The temperature control arrangement may also include a cold inlet for a coolant at a first temperature and a warm inlet for a coolant at a second temperature, the first temperature being lower than the second temperature. The temperature control arrangement may further include a coolant outlet fixable in a fluid-conducting manner to a coolant inlet of the oil cooler.

Abstract: A turbomachine having a stator with at least one stator component and a rotor with at least one rotatable rotor component. The stator component defines at least one wall of a cooling cavity with a high pressure area of the turbomachine and the stator and the rotor defining a working media fluid path, the working media fluid path being in a low pressure area of the turbomachine, whereby a pressure of the low pressure area is lower than a pressure of the high pressure area and the low pressure area and the high pressure area are separated by a sealing ring, the sealing ring being an annular ring with a diaphragm at an inner end of the annular ring.