Abstract: A CAES generator includes a plurality of motors, a plurality of compressors, a pressure accumulator, an expander, a generator, an electric-motor inverter that changes a rotation speed of each of the motors, a feed command receiver that receives input power as a feed command value before feeding the input power, and a controller. The controller includes a compressor number calculation unit that calculates a maximum number of motors that are allowed to be driven at a rating based on the feed command value, and a compressor drive control unit that drives at the rating, the motors, the number of which is the maximum number calculated by the compressor number calculation unit.

Abstract: An analysis method of absolute energy efficiency and relative energy efficiency of the compressed air system. For the compressed air system operating in a form of a single compressor, a gas flow rate and a corresponding operating power of the compressor operating in the single compressor model are measured under a specified flow rate. Meanwhile, influencing factors of the compressor operation are monitored. The absolute energy efficiency of the compressor is defined, and a curve of the absolute energy efficiency of the compressor varying with the operating time versus the above factors are plotted in a same coordinate system. Obtaining absolute energy efficiency data of the compressor in a corresponding state. By analyzing the absolute energy efficiency under corresponding conditions and based on the corresponding chart, the actual unit consumption of a given single compressor and its changing rule under different production and environmental operating conditions can be intuitively analyzed.

Abstract: A piston pump unit for a hydraulic vehicle power braking system including an electric motor, a planetary gear set, a worm gear, and a piston displaceable in a cylinder. As ventilation of an annular gap between the cylinder and the piston and a back side of the piston, the invention provides a radial hole and grooves in the cylinder.

Abstract: A vehicle, a system, and a method for controlling air movement through the vehicle with a fan of the vehicle is provided. The vehicle includes the fan mounted to the vehicle and configured to move air at a fan end of the vehicle, an object detector mounted at the fan end of the vehicle and configured to detect an object within a detection distance from the fan end of the vehicle, and a controller configured to control actuation of the fan based on detection of the object within the detection distance at the fan end of the vehicle.

Abstract: An Oldham coupling includes an engagement arm. At least either a driving-side rotor or an input gear has an engagement portion engaged with the engagement arm and is connected to the Oldham coupling. The engagement arm has a pair of arm flat surface portions perpendicular to a rotational direction of the driving-side rotor. The engagement portion has a pair of engagement flat surface portions that the arm flat surface portions face in a sliding contact manner. Each arm flat surface portion is, within a range where the arm flat surface portion slides against a facing engagement flat surface portion, always in contact with an overlapping portion of the engagement flat surface portion with the arm flat surface portion when viewed from a direction perpendicular to a sliding direction of the Oldham coupling and in which the arm flat surface portion and the engagement flat surface portion overlap each other.

Abstract: A continuously variable valve duration apparatus includes a camshaft, a cam unit on which a cam is formed, a guide bracket including an upper guide boss, an internal wheel configured to transmit rotation of the camshaft to the cam unit, a wheel housing in which the internal wheel is rotatably inserted, wherein a guide thread is formed in a portion of the wheel housing, and of which a guide shaft is formed to be movably inserted into the upper guide boss, a worm wheel to which an internal thread engaging with the guide thread is formed in the worm wheel, and to which an external thread is formed thereon, a control shaft on which a control worm engaged with the external thread is formed, and an upper bushing mounted on a lower portion of the upper guide boss to support the guide shaft.

Abstract: The invention includes a pump having a barrel, a plunger, a seal, a fluid conduit, and a motion drive. The barrel defines an elongated chamber. The plunger includes a tip, which is disposed in the chamber. The seal sealingly engages between the chamber and the plunger, and the motion drive is configured to rotate the chamber with respect to the plunger and to translate the tip within the chamber.

Abstract: A pulsatile fluid pump system for driving a fluid pump assembly includes a reciprocating linear motor having a magnet and a coil, the magnet moving in relation to the coil, the coil having an electrical input. The pulsatile fluid pump system further includes a controller system having an electrical output coupled to the electrical input of the coil, and the controller system is configured to execute a waveform program defining an electrical waveform at the electrical output. The waveform program is configured to control operation of the linear motor by modification of a feature, selected from the group consisting of amplitude, frequency, shape, and combinations thereof, of the electrical waveform at the electrical output. The waveform program is further configured to accept a set of user-specifiable parameters defining the performance of the linear motor and to modify the electrical waveform in response to such parameters.

Abstract: A valve opening and closing timing control device includes a drive-side rotating body that rotates synchronously with a crankshaft of an internal combustion engine, a driven-side rotating body that rotates with a camshaft of the internal combustion engine, an electric motor that controls a relative rotation phase of the drive-side rotating body and the driven-side rotating body, a motor control unit that controls a current supplied to the electric motor, a current sensor that detects the current flowing into the electric motor, a regulation unit that determines a regulation phase in which the relative rotation phase is mechanically limited in an advanced angle direction and in a delayed angle direction, and a regulation phase detection unit that detects the regulation phase based on when the relative rotation phase in which a change is stopped by the regulation unit is reached and a current value detected by the current sensor increases.

Abstract: A fan device used with respect to a computing device. The fan device includes at least two fans that provide airflow for the computing device and a controller that adjusts the fans' speeds in an attempt to avoid harmonic vibrations of the at least two fans. The fan device may include at least one sensor, and the controller may adjust the fans' speeds based at least on information from the sensor(s) in the attempt to avoid the harmonic vibrations. The attempt to avoid the harmonic vibrations may also attempt to mitigate one or more of turbulence, pressure, over-heating, power consumption, or noise in, by, or around the computing device. Reversal of airflow may also be used. A fan bar that enables isolation of ground return noise may also be used. The controller may use sums of primes calculations, phase analysis, common divisor calculations, and the like. Also, associated methods.

Abstract: A compressor includes: a case including a discharge part configured to discharge refrigerant and defining a reservoir space configured to store oil; a drive unit including a stator and a rotor; a rotary shaft coupled to the rotor; a compression unit coupled to the rotary shaft and lubricated with oil, the compression unit being configured to compress refrigerant and discharge compressed refrigerant in a direction away from the discharge part; a muffler coupled to the compression unit and configured to guide refrigerant to the discharge part; a separator coupled to at least one of the rotor or the rotary shaft and configured to separate oil from refrigerant guided to the discharge part; and a coupling unit that fixes the separator to the at least one of the rotor or the rotary shaft.

Abstract: A method of operating a compressor system includes determining an efficiency of a compressor configured to operate at a plurality of output flow settings, including one or more of measuring, calibrating, calculating, or modeling motor efficiency over a range of supply voltage and pulse width modulation duty cycle combinations, each combination including a supply voltage of a plurality of supply voltages and a pulse width modulation duty cycle of a plurality of pulse width modulation duty cycles. The method further includes selecting a supply voltage and a pulse width modulation duty cycle for use at at least one output flow setting of the plurality of output flow settings based on the determined efficiency of the compressor, generating the selected supply voltage by maintaining, reducing, or increasing a nominal supply voltage, and applying the selected pulse width modulation duty cycle.

Abstract: A process includes obtaining a first set of measurements of an electronic pump operating at a parameter, determining a state value based on the first set of measurements, and determining a reference key based on the state value and the parameter. The process also includes obtaining a second measurement using a second sensor, determining a first threshold, and storing the first threshold in association with the reference key. The process further includes obtaining a second set of measurements including a third and fourth measurement acquired by the first and second sensor. The process further includes determining the reference key based on the third measurement using the function, selecting the first threshold by using the reference key when referencing the data structure. The process further includes determining whether the fourth measurement satisfies criteria based on the first threshold and modifying the electronic pump operation.

Abstract: A pressure regulating device cooperates with a semiconductor production system to regulate a pressure in a pipe of a semiconductor production apparatus in the semiconductor production system. The pressure regulating device reduces the pressure in the pipe of the semiconductor apparatus by a suction pump to prevent from liquid leakage when the pipe is broken. In addition, the pressure regulating device can periodically record the pressure change in the pipe to facilitate an operator to judge whether the pipe is damaged and analyze the cause of decrease in production yield.

Abstract: A method for controlling a motor-driven pump in communication with a fluid system is provided. Preferably the method employs a frequency drive system to control the motor-driven pump. The control method is characterized in that the operating frequency of the motor can be adjusted very quickly and it is ensured to be operated in a safe frequency range no more than a rated current.

Abstract: A variable camshaft timing (VCT) assembly includes an independent VCT device that can couple with a first camshaft and change an angular position of the first camshaft relative to the angular position of a crankshaft. The independent VCT device has a stator and an output fixedly coupled with the first camshaft. The VCT assembly also includes a dependent VCT device that angularly adjusts a second camshaft in response to angular adjustment of the first camshaft. The dependent VCT device has a camshaft link coupled with the output of the independent VCT device; the camshaft link has a slot positioned radially outwardly from an axis of camshaft rotation.

Abstract: A driving device includes a voltage regulation circuit, a driving signal generation circuit, a current limiting circuit, and a voltage control circuit. The voltage regulation circuit regulates a power supply voltage and outputs a driving voltage. The driving signal generation circuit generates a driving signal to a piezoelectric element of a piezoelectric pump by using the driving voltage. The current limiting circuit limits a driving current corresponding to the driving voltage to a specified current or less, and generates a current control voltage. The voltage control circuit limits the driving voltage based on the current control voltage.

Abstract: A variable camshaft timing (VCT) assembly for controlling the angular position of concentric camshafts includes an independent VCT device that is configured to couple with a first concentric camshaft and change an angular position of the first concentric camshaft relative to an angular position of a crankshaft; and one or more dependent VCT devices mechanically linking an output of the independent VCT device with a second concentric camshaft, wherein the dependent VCT device(s) change(s) an angular position of the second concentric camshaft relative to the angular position of the first concentric camshaft based on angular movement of the output of the independent VCT device.

Abstract: An air compressor includes a motor, a compression mechanism configured to be driven by the motor to generate compressed air, a tank configured to store the compressed air, a controller configured to control driving of the motor, an air extraction port configured to extract compressed air from the tank, and an extraction pressure sensor configured to measure an extraction pressure that is a pressure of compressed air extracted from the air extraction port. The controller is configured to control the driving of the motor by referring to the extraction pressure.

Abstract: A cooling fan includes: a fan housing; a rotation shaft rotatably supported in the fan housing; a stator fixed to the fan housing; a rotor, which is provided with a magnet that is disposed with a predetermined gap away from the outer circumferential surface of the stator, and which has an impeller connected thereto; and a printed circuit board (PCB) which is installed on a lower side of the stator, and is equipped with a circuit component for controlling the cooling fan and a Hall sensor for sensing the revolutions of the rotor. In order to increase the sensing power of the Hall sensor, the magnet is formed such that the length or the width of the magnet at the lower part thereof that is adjacent to the Hall sensor is larger than that of the other parts of the magnet.