41results about How to "Reduce harshness" patented technology

The present invention discloses a sound wave filtering structure. The sound wave filtering structure comprises a cavity wall, a cavity cover and a slit. The cavity cover is mounted on the cavity wall. The cavity wall and the cavity cover are combined to form an inner cavity. The slit is formed on the cavity wall and/or the cavity cover. The cavity wall and the cavity cover seal the inner cavity. A space in the inner cavity is communicated with the outside only through the slit. On the other hand, the present invention further provides a side sound generating speaker module. The side sound generating speaker module at least comprises a side sound generating cavity and the above-described sound wave filtering structure. The side sound generating cavity is configured to guide sound waves to be transmitted from a side surface of a single speaker body. The sound wave filtering structure is arranged on the side sound generating cavity. The slit faces the interior of the side sound generating cavity. The sound wave filtering structure provided by the present invention can adjust and filter high-frequency sound waves. Especially, in the side sound generating speaker module, the sound wave filtering structure can significantly improve the sound quality of the high-frequency sound waves.

Systems and methods for reducing noise and vibration that may be associated with engine braking are presented. In one example, intake and exhaust valve timings are adjusted to reduce engine noise and vibration at lower engine braking request levels. The engine intake and exhaust valve timings increase compression engine braking and decrease engine expansion braking for higher engine braking request levels.

A roof bow reduces noise and vibration of a motorized vehicle and includes a body having a length and two ends spaced apart from each other. The body also includes a metal and has thickness from about 0.25 mm to about 2 mm substantially along the length. Moreover, the body defines a base and first and second edges extending from the base. Each of the base and the first and second edges extend substantially along the length between the ends of the body. The first and second edges are each disposed transverse to the base and laterally spaced apart from each other substantially along the length. The roof bow also includes a plurality of ribs. The plurality of ribs have a thickness from about 0.5 mm to about 5 mm and include a polymer. The plurality of ribs is disposed between the first and second edges and coupled to the body.

An internal combustion engine with a centrifugal pendulum device having a pendulum mass carrier, a moveable coupling element rotatably coupled to the pendulum mass carrier via a first bearing element, the coupling element forming a continuous piece of material, and two pendulum masses spaced away from one another and rotatably coupled to the coupling element via a second bearing element and a third bearing element.

The invention relates to an electric dust cleaner with high adsorb property and sound adsorb property, which comprises: an electric fan for generating adsorb wind with an exhaust outlet; an electric fan room that at least partly covering said electric fan; and a main body exhaust outlet for discharging the discharge wind from the electric fan room to the air; on the box, an outlet is arranged to discharge the discharge wind of electric fan outside the box, and a bypass wall is arranged to bypass the discharge wind of said outlet. The inventive electric dust cleaner can realize high adsorb efficiency, reduce noise and adsorb noise.

A sound output device for masking an operation sound generated by equipment, having: a sound reproducing unit that starts reproducing a masking sound before the operation sound is generated; and a sound output unit that outputs the masking sound reproduced by the sound reproducing unit.

The invention discloses corn dumpling flour which is characterized in that: the corn dumpling flour is prepared by mixing pure corn flour, frozen corn flour, cured corn flour, puffed corn flour, puffed soybean flour, glutelin flour and sodium carboxymethylcellulose at a mass ratio of (35-45): (5-15): (5-15): (5-15): (15-25): (5-15): (0.03-0.05). The dumpling wrapper prepared from the dumpling flour has delicate mouthfeel and golden color, and is not broken after long-term boiling while the soup is clear; and moreover, if the flour is kneaded in the processing process, the dumplings can be made without needing fermentation.

The invention mainly relates to the technical field of food, and discloses hangover-alleviating liver-protecting tea. The tea is made from the following raw materials: Chinese wolfberry fruits, cassia seeds, stigma maydis, chili leaves, tribute chrysanthemum, cattail pollen, garden burnet roots, agastache rugosa, lactic acid bacteria, Angel saccharomyces cerevisiae, hericium erinaceus polysaccharide and tremella polysaccharide. The tea is strong in flavor, tastes slightly bitter at first and then is slightly sweet in after taste. The tea can improve resistibility, promotes metabolism, speeds up decomposition and excretion of alcohol, makes the hangover-alleviating time of a drinker shortened by 1/3, protects the liver and stomach and resists and prevents cancer. The tea is fermented by lactic acid bacteria, tastes slightly sour, is reduced in raw astringency and improved in fragrance and nutrition, is easy to be absorbed, and speeds up hangover alleviation. Through fermentation by Angel saccharomyces cerevisiae, the effective components are further promoted to be extracted, small molecule nutrition is produced, and the soaking time during drinking is shortened. The type and function of tea in the market become abundant, and the economic income is increased by 13.6%. The tea is convenient to drink, and the soaking time of the tea is shortened by 1/2 when compared with that of common tea.

A fuel control system and fuel control method of gasoline direct injection engine can improve noise vibration harshness (NVH) by preventing fuel from flowing backward into a low pressure pump by determining whether the ignition of the engine is turned off and maintaining the operation of an inlet valve of a high pressure pump for a predetermined time when the ignition of the engine is determined to be turned off.

An integrated power electronics component configured for mitigating noise, vibration, and harshness includes a case formed from metal and configured to dampen a sound wave having a first frequency and a first amplitude and propagatable in a first direction. The case has a first surface and a second surface spaced apart from the first surface, a first stiffness, and a first strength, and the first and second surfaces include a structure defining a plurality of recessions therein. The component includes a cured polymer formed from a composition disposed on at least one of the first and second surfaces in each of the recessions to thereby dampen the sound wave in the first direction and in a second direction that is perpendicular to the first direction to a second frequency that is less than the first frequency and a second amplitude that is less than the first amplitude.

The invention discloses a preparation method for a continuous fiber-reinforced thermoplastic composite seat base plate front end part, which includes the following steps: step 1, cutting a continuousfiber-reinforced thermoplastic composite sheet; step 2, feeding the cut continuous fiber-reinforced thermoplastic composite sheet to a drying oven for heating and softening; step 3, conveying the softened continuous fiber-reinforced thermoplastic composite sheet to a fixed die of a mould pressing injection mold, wherein a moving die of the mould pressing injection mold is provided with a pluralityof top blocks to sequentially compacting parts of the continuous fiber-reinforced thermoplastic composite sheet to the fixed die; step 4, performing die assembly to the moving die and the fixed die of the mould pressing injection mold for injection molding and pressure maintaining, and opening the mould to obtain the continuous fiber-reinforced thermoplastic composite seat base plate front end part. The method provided by the invention can solve the lacking of sheets near to an elongation hole or lacking of outer side edge sheets of the seat base plate front end part, and the fact that the sheet completely covers the seat base plate front end part is guaranteed.

A vehicle having a hidden storage compartment with a user notification system and method of using the same is provided. The vehicle includes a storage container securely fixed onto an interior surface of a vehicle floor panel in the footwell area. A floor covering is disposed over the footwell area covering the storage container and includes a flap having a living hinge configured to selectively cover and uncover the lid of the storage container. The storage container includes a biometric scanner, a mass sensor, and a lid sensor in communication with a notification controller. The notification controller analyzes the information received from the biometric scanner, lid sensor, and mass sensor, and determines the state of the storage container based on a logic table. The notification controller then selectively transmit a predetermined message to the user based on the state of the storage container.

The invention relates to a tubular wind wheel capable of being used for air conditioner and fan products such as a split-type air conditioner indoor unit, a movable air conditioner, an air freshener, a dehumidifier, a low static pressure blast pipe machine, a tower fan, a window type air conditioner and so on. The tubular wind wheel comprises a rotating shaft (27) and blades which are arranged on the rotating shaft (27), and is characterized in that the blades which are arranged on the rotating shaft (27) comprise large blades (24) and small blades (26); the diameters of the large blades (24) and the small blades (26) are unequal, and the large-diameter blades (24) and the small-diameter blades (26) are distributed in the staggered form; and the mounting intervals along the circumferential direction between the large blades (24) and the small blades (26) are unequal intervals. The tubular wind wheel has the advantages of good sound quality, low noise, large air quantity, high production efficiency, easy change of the shape of the blades and the length of the wind wheel, high reliability and so on.

The invention belongs to the technical field of engine torque control, and discloses a torque control method and a torque control system of a non-uniform acting engine, comprising the following steps: S1, acquiring engine torque control information; s2, according to the engine torque control information, the corrected engine target indication torque is calculated; s3, according to the engine torque control information and the corrected engine target indication torque, the sum of the fuel injection quantity of each cycle when all the air cylinders work is calculated; s4, according to the engine torque control information and the total fuel injection quantity of each cycle, the total fuel injection quantity of each cylinder in a single cycle is calculated; and S5, according to the engine torque control information and the single-cycle total fuel injection quantity, the injection sequence of each cylinder, the fuel injection advance angle and the fuel injection quantity of each time, the single-cycle target air inlet flow and the target rail pressure are calculated. According to the torque control method of the non-uniform acting engine, the influence of the non-uniform acting working condition on the output torque is considered, and the sound vibration roughness is effectively reduced.

The invention discloses an outdoor fan protection device applied on rainstorm days, and relates to the technical field of fan protection. The outdoor fan protection device applied on the rainstorm days comprises a base, wherein a carrying plate is arranged above the base, and damping mechanisms are arranged between the base and the carrying plate. According to the device, through cooperative use of a protection box, a motor, a first rotating rod, a first gear, a second rotating rod, a second gear, a rotating disc, a transmission rod, sliding blocks, a sliding rod, swing sliding blocks and swing rods, leaves and snow falling into a solar energy absorption plate are swept, and shielding objects are reduced to enable the solar energy absorption plate to absorb solar energy; and through cooperative use of a first fixed rod, a second fixed rod, a connecting plate and an electric push rod, the angle of the solar energy absorption plate is adjusted, the absorption of the solar energy by the solar energy absorption plate is increased, and exposure of a fan in the sun and corrosion of the fan by rainwater are reduced.

The invention discloses a manageable double-layer sickbed which comprises a bed body and a bed plate arranged in the bed body. Mounting plates are fixed onto opposite inner side walls of the bed body, sliding grooves are formed in opposite side walls of the two mounting plates, fixed plates are fixedly arranged on two sides of the lower end of the bed plate, sliding rails are fixedly arranged on the outermost sides of the two fixed plates, and one side of each sliding rail is provided with a plurality of mounting grooves. The invention further discloses a manageable double-layer sickbed system and a double-layer sickbed management method. The problem of difficulty in managing double-layer sickbeds in hospitals can be solved, the sickbed is monitored and controlled, the lower bed plate is used within the stipulated time, management of the accompanying bed plate is facilitated, arbitrary use of the accompanying bed plate by accompanying personnel is avoided, cleanliness of a ward and the working efficiency of doctors are improved, a lower rest area is large, pulling noise is low, and the influence of the lower bed plate on patients and medical staff is reduced.

The invention discloses a catalyst for pollutant degradation under natural light, a preparation method of the catalyst and a method for degrading and adsorbing malachite green by photodriving under the natural light. The catalyst is biochar-ZnO nanoparticles taking biochar as a carrier and taking zinc oxide as an active component. According to the catalyst, spartina alterniflora filtrate is takenas a reducing agent and a dispersing agent; zinc oxide nanoparticles are uniformly mixed into spartina alterniflora powder by an ultrasonic method; the specific surface area of the catalyst is increased by a carbon aerogel technology, and therefore, reaction operation is simple, the catalyst is safe, pollution-free, high in catalytic efficiency and high in industrial utilization rate; and the catalyst has a certain application value in the aspect of degrading pollutants under the natural light.

The invention discloses an automatic parking method and system thereof. The method comprises the following steps: detecting a vehicle speed and acquiring the vehicle running speed; detecting a braking movement, applying the braking movement to generate a braking order; comparing the vehicle running speed with the preset speed to generate a comparison result indicating whether the parking operation shall be initiated; wherein based on the braking order and the comparison result, controlling the working condition of a gear shifting bar, a first parking system and a second parking system, and based on the vehicle running speed and the braking order, controlling the working condition of the gear shifting bar, the first parking system and the second parking system. Compared with the prior art of the automatic parking method and system provided by the present invention can effectively reduce the noise, vibration and harshness, improve the driving comfort. The determination of parking operation availability based on the speed can effectively protect the transmission parts of the gear box and enhance the parking efficiency.