113results about How to "Reduce intake noise" patented technology

A vehicle seat with a backrest (16) that has a backrest cushion (18) and a rear backrest cover (20), and an air-handling device that is associated with the backrest (16) and is connected to an air distribution device (30, 32) in the seat. The rear backrest cover (20) is at least partially air permeable, and covers at least one passage (27) of the air-handling device (23). The air exchanged between the environment and the air-handling device (23) passes for the most part through the air-permeable regions of the backrest cover (20).

An air intake sound control structure comprises a sound guiding pipe, a sound producing body, and a silencing means. The sound guiding pipe is branched off from a branch portion formed on a part of an air intake flow passage of an automobile, communicating with the air intake flow passage. The sound producing body is held by the sound guiding pipe at the position spaced apart from the branch portion, thereby sealing the sound guiding pipe, and producing a sound at a frequency which corresponds to its own natural vibration frequency by its vibration. The silencing means is disposed on the side of the branch portion of the sound guiding pipe and canceling a sound at a target frequency for suppression out of the air intake sound. The sound generated by the vibration of the sound producing body is transmitted into a vehicle interior.

The invention discloses an electronic vacuum pump for a new energy vehicle brake vacuum booster. The electronic vacuum pump comprises a motor assembly, a supporting base, a pump chamber lower cover, a driving sleeve, a pump rotor, blades, a pump chamber, a pump chamber upper cover, a pump body cover and fixing pins, wherein a left side air feeding slot of the pump chamber lower cover, a left side air feeding through hole of the pump chamber and a left side air feeding slot of the pump chamber upper cover are communicated with one another to form an air passageway; a right side air feeding slot of the pump chamber lower cover, a right side air feeding through hole of the pump chamber and a right side air feeding slot of the pump chamber upper cover are communicated with one another to form an air passageway; a flow guide slot of the pump chamber lower cover is communicated with an inner cavity of the pump chamber; an air discharging slot of the pump chamber upper cover is communicated with the inner cavity of the pump chamber; the flow guide slot of the pump chamber lower cover and the air discharging slot of the pump chamber upper cover are symmetric. When the vacuum pump works, an air path with four air inlets and two air outlets is formed; therefore, the air feeding resistance is greatly reduced, and the air feeding amount of the pump chamber is increased; under the equal energy consumption, the vacuumizing efficiency of the vacuum pump provided by the invention is higher.

The purpose of the intake system, which is disposed in a limited space above the engine, is to improve engine performance by preventing increase in both temperature and resistance of intake air, and also to reduce noise of the intake air. In the intake system, a rear wall extending downwardly is formed in a lower half body that is joined to a rear end of an engine cover, and a mounting frame section for attaching an element is formed in a rear wall section. An upstream-side casing is formed forward of the rear wall section. An intake duct has a downstream end connected to a front surface of the upstream-side casing adjacent to a transmission. Further, the intake duct extends widthwise of the vehicle and has an upstream end opened to the side edge of the engine cover adjacent to the transmission. A resonance chamber casing is joined to the side departing from the transmission through a communication pipe forward of the upstream-side casing. The resonance chamber casing is formed to extend along the full width of the engine cover so as to cover the front of the intake duct.

The invention discloses a low-noise automobile electronic vacuum pump. The low-noise automobile electronic vacuum pump comprises a motor assembly, a supporting base, a pump chamber lower cover, a driving sleeve, a pump rotor, blades, a pump chamber, a pump chamber upper cover, a silencing part, a pump body cover and a fixing pin. Multiple air chambers evenly distributed in the circumferential direction of the cylinder wall of the silencing sleeve and a converging cavity located in the center are formed in the silencing part. The air chambers include the air inlet air chamber, the buffering air chamber and the air outlet air chamber according to functions. According to the above structure, air flow enters the silencing part from two exhaust ports in the pump chamber upper cover, air flow flowing out from each exhaust port and entering the silencing part sequentially passes through the buffering air chamber and the air outlet air chamber and is converged at the converging cavity after flowing out of the air outlet air chamber, the air flow flows out of an outlet of the converging cavity and flows out after being further buffered through the space between the silencing sleeve and the pump body cover, and finally, the air flow flows out of the silencing part and is exhausted from an air outlet pipe. By means of the structure of the air chambers and the converging cavity, an air way is lengthened, the air flow is buffered, and the effect of effectively lowering noise is achieved.

A multi-cylinder rotary type compressor designed to reduce intake loss and noise. The multi-cylinder compressor includes first and second compressing compartments partitioned from each other; first and second intake ports communicated with the first and second compressing compartments, respectively; and a communication hole located adjacent to the first and second intake ports to communicate the first compressing compartment with the second compressing compartment.

An apparatus for conditioning a volume of air is provided. The apparatus includes a housing having an electric heating element; a high-pressure variable-speed centrifugal blower for providing constant velocity air flow. The apparatus also includes a controller adaptable to control the electric heating element and the high pressure variable speed blower to raise the temperature within the zone by substantially 15 degrees, or more, in substantially 7 minutes or less. The apparatus also includes an air output flange for disposition between the zone and an air duct disposed between the housing and the air output flange.

The invention belongs to the technical field of compressors, in particular to a piston valve air suction non-lubricated air compressor which comprises a cylinder, a cylinder cover, a crank case, a piston and a connecting rod, wherein the piston is fastened and connected with the connecting rod or is made together with the connecting rod, the piston is provided with a sealing ring and is arranged in the cylinder, and the peripheral surface of the sealing ring and the inner hole wall surface of the cylinder form an air suction channel of the compressor by adopting an offset cylinder or oblique piston or simultaneously adopting the offset cylinder and the oblique piston when in air suction so as to achieve the effect of controlling the air suction by the piston valve. Because an air inlet one-way valve of the traditional compressor is discarded, the structure is simplified, quick-wear parts are reduced, the working reliability is improved, the mechanical noise source and the clearance volume of the compressor are reduced and the volumetric efficiency is improved. In addition, the crank case is used as an air inlet anechoic room, the piston is provided with a guide member and a buffer member which can release the knock strength of the piston to the cylinder, therefore, the noise of the compressor can be effectively lowered.

The invention relates to the technical field of air compressors, and discloses an oil-free piston type air compressor for a new energy vehicle. The oil-free piston type air compressor for the new energy vehicle comprises a crank case, a cylinder body and a cylinder head assembly, wherein a piston cylinder is arranged in the cylinder body; the cylinder body is arranged above the crank case and is connected with the crank case; the cylinder head assembly is arranged above the cylinder body and is connected with the cylinder body; a low-pressure heat exchanger connected with the crank case is arranged on the front side of the cylinder body; a manifold block connected with the cylinder body is arranged at the right end of the cylinder body and is connected with the low-pressure heat exchangerthrough a first water inlet pipe; a first water outlet is formed in the left end of the low-pressure heat exchanger and is connected with the cylinder head assembly through a first drainage pipe; a high-pressure heat exchanger connected with the crank case is arranged on the back side of the cylinder body; the manifold block and the high-pressure heat exchanger are connected through a second waterinlet pipe; and a second water outlet is formed in the left end of the high-pressure heat exchanger and is connected with the cylinder head assembly through a second drainage pipe. The oil-free piston type air compressor for the new energy vehicle provided by the invention adopts water-cooling and air-cooling double-acting cooling manners so as to be sufficient in cooling and better in effect.

An apparatus for improving cooling performance of an engine room in a vehicle, may include an air duct connected to an air cleaner to serve as a moving guide of fresh air; a duct flap installed to open and close some section of the air duct and operated to supply all the fresh air introduced into the air duct when the air duct is in a closed state to the air cleaner and discharge some of the fresh air introduced into the air duct when the air duct is in an opened state to a space of a high temperature part of the engine room; and an actuator supplying power to the duct flap to perform an opening and closing operation of the duct flap.

An air intake device includes an inner pipe member having a substantially cylindrical shape and defining therein an air intake passage by a wall portion of the inner pipe member, and an outer pipe member which surrounds a periphery side of the inner pipe member to define therebetween a space. The air intake passage communicates a surge tank with an atmosphere intake port through which air is introduced into the surge tank. The wall portion of the inner pipe member has at least one sound transmission portion through which sound is more readily transferred than other portions of the wall portion. The space has one end which is opening and positioned at a side of the atmosphere intake port, and the other end which is closed and positioned at a side of the surge tank.

The invention provides an air intake device for an internal combustion engine, and air intake noise produced by open of a throttle valve is effectively prevented. Through rotation of a throttle valve's valve rod disposed in an air intake path of the combustion engine, when an end of a platelike valve body moves towards an upstream side of the air intake path and the other end moves towards a downstream side of the air intake path, a main stream at high flow velocity passing through a gap between an end of the valve body and a wall of the air intake path mixes with side flows of downstream of the valve body, and form a vortex so the air intake noise is formed. However, two ends of a first partition plate is disposed approximately parallel to a flow direction of intake air and includes opposite ends connected to a first inner wall surface of the air intake path closer to the first end than the second end. The first partition plate has a substantially curved convex shape protruding radially inward of the air intake path, so the main stream is surrounded from the wall of the air intake path and the first partition plate and the main stream does not mix with the side flows, thereby restraining generation of the vortex and effectively reducing the air intake noise.

The invention discloses an air feeding structure for an automobile. The air feeding structure for the automobile is arranged between an air feeding grid of the automobile and a corrugated tube. The air feeding structure is that an upper part and a lower part are combined to form a cavity; a main air inlet and a tubular body are formed in the cavity; a downwards-inclined flow guide plate is arranged at the main air inlet; a strip-shaped opening is formed in the wall of the tubular body of the flow guide plate; a main air inlet is formed in the lower side edge of the flow guide plate and communicated with the inner part of the tubular body through the strip-shaped opening; a space is formed between the lower side of the flow guide plate and the lower part of the tubular body and is divided into a main cavity and a secondary cavity through a separating plate, wherein the main cavity is communicated with the secondary cavity; a plurality of secondary air inlets are formed in the wall of the tubular body, close to the secondary cavity and used for communicating the secondary cavity with the tubular body. The invention further discloses an air feeding system for the automobile and the corresponding automobile. With the adoption of the air feeding structure, clean air at proper temperature can be provided to an engine.

An intake noise reduction device includes an air cleaner, an intake funnel and a resonator, and is connected to an engine via a throttle body. The resonator is provided inside of the air cleaner. The resonator includes a chamber portion and a pipe portion. The pipe portion is formed to extend downward from the chamber portion, and has an opening end at a lower end. The intake funnel is provided at a lower end of the air cleaner. An opening end of the resonator is inserted into the intake funnel. A cross sectional area of an intake passage between the intake funnel and the pipe portion is set to not less than an opening area of an intake passage of the throttle body opened to a maximum throttle opening.