108results about How to "Low noise operation" patented technology

A vehicle comprises electric motor, generator of simulated engine sounds, decider of whether or not to generate simulated engine sounds and controller of the level of simulated engine sounds. The controller smoothly increases level of simulated engine sounds upon decision of sound generation on detection of pedestrian, crosswalk, narrow road, or road with no sidewalk. The decider is responsive to vehicle navigation system, or ETC, or camera of EDR. EDR records the decision as circumstantial evidence. The decision may be optionally possible, but is forcibly made upon necessity. Simulated engine sounds can be greater than, or equal to, or less than real engine sounds. The controller makes a soft peak of simulated engine sound upon brake or accelerator operated. Balance of simulated engine sounds among front, rear, right and left of vehicle is changeable in response to shift lever or blinker lever operation. The decision is visually indicated inside vehicle.

A device for measuring an angle and / or the torque acting on a rotatable body is proposed according to the invention, whereby the rotational angle is detected by means of magnetic or optical sensors. In particular, in a preferred exemplary embodiment, two devices (7, 8) are proposed, each of which comprises two optically readable code tracks. The two code tracks (1a, 1b or 2a, 2b) on one device (7 or 8) are similar in design and are offset in relation to each other, so that associated sensors (4) output a digital signal. The rotational angle is calculated based on the lag between the two digital signals. In a further embodiment it is provided that a torsion element (5) having a known torsional stiffness is situated between the two devices (7, 8). Torque transferred by the rotatable body (3) can also be calculated therefore from the angular difference of the two devices 7, 8. The device is used preferably in the steering axle of a motor vehicle.

An air compressor includes: a tank portion for reserving compressed air used in a pneumatic tool; a compressed air generation portion for generating compressed air and supplying the compressed air to the tank portion; a drive portion including a motor for driving the compressed air generation portion; a control circuit portion for controlling the drive portion; and a pressure sensor for detecting pressure of the compressed air reserved in the tank portion. The control circuit portion includes a unit for controlling the rotational speed of the motor multistageously on the basis of a detection signal output from the pressure sensor.

An aircraft provides hovercraft power via fabric fans that produce lift for supporting the craft above an underlying support surface. Fabric fans are specially configured for maximum efficiency. In one embodiment, a helicopter utilizes the fan as part of a tail rotor assembly.

A fuel cell includes a ceramic component and a sealing component. The sealing component includes a first glass-ceramic layer over the ceramic component and a second glass-ceramic layer over the first glass-ceramic layer, each of the first and the second glass-ceramic layers independently including between about 0.5% and about 50% glass phase content by volume. The first glass-ceramic layer includes a higher glass phase content than the second glass-ceramic layer, and between about 0.5% and about 10% glass stabilizer component by weight. In a method of sealing a ceramic component of a fuel cell, a first coat is applied over a first ceramic component of the fuel cell, the first coat including SiO2, and further including between about 0.5% and about 10% glass stabilizer component by weight. A second coat is applied over the first coat, the second coat including SiO2. The first and second coats are heated to form a sealing component, to thereby seal the ceramic component with the sealing component. Features of the sealing component are as described above.

A rectangular wave or a waveform similar to the rectangular wave is output with an conductive angle no less than 120° but no more than 150° during low-speed operation, but output a rectangular wave, a sine wave or a waveform similar to them with an conductive angle no less than 130° but under 180° by changing the frequency only while maintaining the PWM duty constant at high-speed operation, making it possible to realize high-efficiency and low-noise operation at low-speed operation, secure stable high speed, and prevent peak current of effective current because the current waveform also comes closer to sine wave.

A check valve for a fuel pump of a vehicle includes a valve housing adapted to be disposed in an outlet member of the fuel pump. The check valve also includes a valve guide disposed within the valve housing and a valve seat disposed within the valve housing and spaced from the valve guide. The check valve further includes a valve member having an aerodynamic shape disposed within the valve housing and having a closed position to engage the valve seat to prevent fuel from flowing through the outlet member and an open position to cooperate with the valve guide to allow fuel to flow through the outlet member.

In an internal combustion engine comprising a mechanical charger in the form of a positive displacement compressor connected to the engine intake duct for supplying compressed air to the engine and a turbo-compound including an exhaust gas turbine connected to the engine exhaust duct for converting energy remaining in the exhaust gas to power, the exhaust gas turbine being connected to the engine via a reduction gear drive, the mechanical charger and the turbo-compound are coupled to the engine by a common belt drive including a first belt pulley mounted on the crankshaft of the engine, a second belt pulley mounted on the shaft of the reduction gear drive, and a third belt pulley mounted on the shaft of the mechanical charger.

A pixel and a pixel array of an image sensor device of the present invention have small pixel sizes by resetting sensed charge using a diode built vertically above a substrate. The pixel and the pixel array also have low noise performance by using a JFET as a source follower transistor for sensing charge. The pixel includes a floating diffusion node configured to sense photo-generated charge, a reset diode configured to reset the floating diffusion node in response to a reset signal, and a junction field effect transistor configured to output a signal having an output voltage level corresponding to a charge level of the floating diffusion node.

The invention relates to the field of increasing the amount of a gas component in a gas mixture, especially of enriching air with oxygen. According to the invention, the gas concentration arrangement comprises: a discharge chamber (1) including an input side and an output side, —a gas discharge device (2) for generating a gas discharge inside the discharge chamber (1) for generating a pressure gradient on the output side and / or the input side of the discharge chamber (1), and a gas selection device (3), which is arranged on the input side or the output side of the chamber (1) and which is exposable to a gas flow generated by the pressure gradient.

A cooling air intake structure of a desk-top computer having a housing containing a mother board with a processor, includes one of a passage frame extending from one side to the other side of the housing, defining a passage penetrating through the housing and having a predetermining cross-sectional area, and a recess portion, on each of the sides of the housing, having a predetermined cross-sectional area. The passage frame and the recess portion have a plurality of air intake vents in the wall thereof.

A solid oxide fuel cell includes an anode layer, an electrolyte layer over a surface of the anode layer, and a cathode layer over a surface of the electrolyte layer. The cathode layer includes a cathode bulk layer, a porous cathode functional layer at an electrolyte, an intermediate cathode layer partitioning the cathode bulk layer and the porous cathode functional layer, the porous intermediate cathode layer having a porosity greater than that of the cathode bulk layer. The solid oxide fuel cells can be combined to form subassemblies that are bonded together to form solid oxide fuel cell assemblies.

A thrust device, in particular for a roller cam mechanism in a steering system, includes a first mechanism member which is held on a frame in engagement with a second mechanism member. The thrust device comprises a pressure piece which is mounted on the frame so as to be displaceable along an axis and is acted on by a spring element for pressing the first and second mechanism members against one another. In order to construct the thrust device for compensating for wear and thermal expansion of the engagement of the mechanism members and to configure it to be inexpensive and quiet during operation, there is provision for the spring element to be formed from rolling bodies which are spring loaded approximately transversely with respect to the axis of the pressure piece, the rolling bodies being supported on oblique surfaces between the pressure piece and a frame part which is configured as a setting screw or cover. The pressure piece can additionally be spring loaded axially by a compression spring.

This invention relates to the stabilization of a laser source used in optoelectronics, specifically a source comprising a semiconductor laser diode (1). Such laser sources are often used as so-called pump lasers for fiber amplifiers in the field of optical communication, erbium-doped fiber amplifiers being a prominent example. Such lasers are usually designed to provide a narrow bandwidth optical radiation with a stable power output in a given frequency band. The present invention now concerns such a laser source using external reflector means, preferably consisting of one or more appropriately designed fiber Bragg gratings (9), providing very high relative feedback with an extremely narrow bandwidth, combined with a very long external cavity encompassing about 100 modes or more and an extremely low front facet (2) reflectivity of the laser diode. This stabilizes the laser source extremely well in its operation, without the need for an active temperature stabilizing element.

A multi-tip nano-probe apparatus and a method for probing a sample while using the multi-tip nano-probe apparatus each employ located over a substrate: (1) an immovable probe tip with respect to the substrate; (2) a movable probe tip with respect to the substrate; and (3) a motion sensor that is coupled with the movable probe tip. The multi-tip nano-probe apparatus and related method provide for improved sample probing due to close coupling of the motion sensor with the movable probe tip, and also retractability of the movable probe tip with respect to the immovable probe tip.

A heat dissipating fan assembly includes a frame provided with multiple ventilation holes, a sleeve on top of a bottom face defining the receiving space and having a connection hole and two opposed retainers formed on a top peripheral edge of the sleeve, a bearing, a stator securely mounted around the sleeve and having a coil set mounted on a circuit board and a rotor having a hollow casing, multiple blades formed on an outer periphery of the hollow casing and a bearing shaft hole defined in a bottom face of the hollow casing to securely receive therein the bearing shaft, the bearing shaft hole having a mediate portion provided with a diameter larger than that of the bearing shaft such that extension of the bearing shaft into the bearing shaft hole reduces possibility of damage to the bearing shaft.

A detector panel having therein an X-ray detector, a signal processing circuit for interface, and a battery for power supply, the detector panel includes a first signal processing circuit for processing the detection signals from the X-ray detector, a second signal processing circuit for processing the output signal from the first signal processing circuit, a first power supply circuit for adjusting the output voltage of the battery by means of switching regulation, to supply the output to the second signal processing circuit, a second power supply circuit for adjusting the output voltage of the first power supply circuit by means of switching regulation, to supply the output to the X-ray detector and the first signal processing circuit, and a switching circuit for switching the configuration of the second power supply circuit between a single connection of one linear regulator and a series connection of two linear regulator.

A solid oxide fuel cell (SOFC) includes a plurality of subassemblies. Each subassembly includes at least one subcell of a first electrode, a second electrode and an electrolyte between the first and second electrodes. A first bonding layer is at the second electrode and an interconnect layer is at the first bonding layer distal to the electrolyte. A second bonding layer that is compositionally distinct from the first bonding layer is at the interconnect layer, whereby the interconnect partitions the first and second bonding layers. A method of fabricating a fuel cell assembly includes co-firing at least two subassemblies using a third bonding layer that is microstructurally or compositionally distinct from the second bonding layer.

An air compressor includes: a tank portion for reserving compressed air used in a pneumatic tool; a compressed air generation portion for generating compressed air and supplying the compressed air to the tank portion; a drive portion including a motor for driving the compressed air generation portion; a control circuit portion for controlling the drive portion; and a pressure sensor for detecting pressure of the compressed air reserved in the tank portion. The control circuit portion includes a unit for controlling the rotational speed of the motor multistageously based on a detection signal output from the pressure sensor.

A motor vehicle door lock, comprising a locking mechanism (1, 2), and a closing / opening device (3 to 7) having a drive, wherein the closing / opening device (3 to 7) acts on the locking mechanism (1, 2), and wherein-the closing / opening device (3 to 7) contains an interposed damping element (16).

A transmission, for a motor vehicle with an auxiliary drive (EM), having a first housing part (2a), a second housing part, a transmission shaft (GW), an auxiliary drive shaft which can be driven by the auxiliary drive (EM), a lay shaft (VW) that is positioned axially parallel to the transmission shaft (GW) and coaxial to the auxiliary drive shaft. The lay shaft (VW) is connected, via a spur wheel stage (Z22, Z23) with the transmission shaft (GW), and the lay shaft (VW) is connected in a rotationally fixed manner with the auxiliary drive shaft and is supported on both sides of the spur wheel stage (Z22, Z23) in a bearing device (9).

In a chain transmission in which a roller chain transmits power from a driving sprocket to one or more driven sprockets, the sprocket teeth are shaped so that at a location radially outward from the sprocket pitch circle, the distance between the front surface of each sprocket tooth to a radial reference line from the sprocket center through the center of the tooth root, is at least as great as the distance from the centerline to the front tooth surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, the sprocket root diameter is smaller than the root diameter according to ISO standards, and the radius of the arcuate tooth gap bottom is greater than the radius of the chain roller.

The invention relates to a switching device, in particular to an electronic eye intelligent and environment-friendly rain control door and window which can automatically probe wind and rain, as well as a control method. The electronic eye intelligent and environment-friendly rain control door and window comprises a window frame and a window sash, wherein roller wheels are arranged at the bottom of the window sash, racks are arranged at the top of the window sash and engaged with a driving gear at the upper part, and the driving gear is arranged on an output shaft of a motor; the motor is connected with a controller, and the controller receives a signal from an outdoor sensor and controls the action of the motor. The electronic eye intelligent and environment-friendly rain control door and window has the advantage of advancement, security, product reliability, energy saving and environment protection as well as low-noise operation and relieves worries for the working.

The present invention relates a tool head for a personal care appliance, including a plurality of tool rotors rotatably supported about rotor axes and a drive train for rotatably driving said tooling rotors from a motor, wherein such drive train includes: an input crank element having connection means for connecting to a drive shaft, a transmitter element configured to be driven by said input crank element, and output crank elements configured to be driven by said transmitter element to rotate about said rotor axis.

In order to make a small space requirement, a low energy requirement and therefore an increased weaving frequency possible in a shedding apparatus, a spring drive is proposed which is connected to magnetically acting holding means. The holding means are capable of holding the heddle frame in an upper shed position and in a lower shed position counter to the spring force. Furthermore, the heddle frame is connected to a linear motor. A heddle movement can be initiated by said linear motor. According to the invention, the spring drive is configured as a tension / compression spring which is designed in such a way that, during operation of the heddle frame at the resonant frequency of the spring drive the greater part of the kinetic energy can be obtained from the spring drive.

The invention relates to a vane cell pump comprising an electrical pump unit that has a pump chamber into and out of which a fluid can flow and also a rotor with a number of vanes to compress the fluid before flowing out from the pump chamber. The vane cell pump also comprises a sound-damping mechanism into which the fluid can flow after flowing through the pump chamber and that has a sound-damping cover attached to a part of the pump chamber and defining a sound-damping volume. A preliminary sound-damping mechanism with at least one preliminary sound-damping outlet from which the fluid can flow may be arranged within the sound-damping volume, wherein the preliminary sound-damping outlet has a cross-sectional profile tapering in the direction of fluid outflow.

Low voltage swing pad driver and receiver. A transmitter portion and a receiver portion are implemented within various devices that communicate using low voltage swing pads communicatively coupled via a trace. The transmitter portion of one device generates a current signal that is pushed / pulled to a low voltage swing pad and is then passed across the trace to another low voltage swing pad. The transmitter portion includes a current driver that outputs the current signal to the low voltage swing pads, and the receiver portion includes a trans-impedance amplifier that transforms the received current signal into a voltage signal. The low voltage swing pad driver and receiver generates a relatively low voltage swing when compared to CMOS full-scale voltage swings thereby significantly reducing the possibility of introducing any noise and / or distortion of data that is communicated via the interface.