JP2012107581A - Intake device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake device for a vehicle capable of truly transmitting so called sport sound generated in a sound piece into a cabin regardless of the arrangement of the sound piece.SOLUTION: The intake device for the vehicle has an intake tube path 5 for introducing outside air into the engine 4 of the vehicle, a resonance tube 10 in communication with the intake tube path 5 and amplifying intake sound having a specific frequency of frequency bands of the intake sound generated when the outside air passes through the intake tube path 5, a sound introducing duct 11 comprising a fibrous material and for introducing the intake sound amplified by the resonance tube 10.

Description

  The present invention relates to a vehicle intake device, and in particular, in a vehicle intake device having an intake sound amplifier that amplifies only an intake sound of a specific frequency, the intake sound amplified by the intake sound amplifier is faithfully transmitted to the vehicle interior. The present invention relates to an air supply device for a vehicle that can be used.

  In recent years, there has been an increasing demand for improving the quietness of a passenger compartment when a vehicle is traveling. On the other hand, in a highly sportive vehicle such as a sports car, there is a strong demand not only for quietness in the passenger compartment but also for enjoying driving.

  One of the pleasures of driving a vehicle is a pleasant sound when accelerating the vehicle, but also a so-called sports sound that is a pleasant or powerful intake sound that occurs when the vehicle engine is accelerated. Included in the sound.

  For example, a sound creator (registered trademark) 10 made up of pipe pieces 12 and 13 is connected to a clean side duct of an air intake device of a vehicle as a device for propagating only a sports sound into the vehicle interior while maintaining quietness in the vehicle interior. In the sound creator 10, there is an air intake device in which a bellows-like sound piece 16 and a diaphragm-like sound piece 17 functioning as a sound pressure generating source are arranged in series (Patent Document 1).

  In addition, in the intake pipe 10 including the intake duct 11, the resonator 12, the air cleaner 13, and the air cleaner hose 14, the resonance pipe 15 and the vibration film 16 are provided, and the intake noise generated in the intake duct 11 is reduced by the resonator 12. There is an intake pipe in which only the resonance pipe 15 and the diaphragm 16 are amplified (Patent Document 2).

JP 2010-168902 A JP 2006-207515 A

  In these intake pipes, it is preferable to emit the sports sound generated by the sound piece or the resonance pipe toward the dashboard of the vehicle. However, depending on the structure of the intake pipe, the sound piece or the resonance pipe may be directly connected to the sports sound. In some cases, it may be difficult to arrange to discharge toward the dashboard.

  In such a case, it is conceivable to connect the sound piece or the resonance pipe and the dashboard with a duct, or to connect a duct for releasing the sport sound toward the dashboard to the sound piece or the resonance pipe. .

  However, when the duct is made of a hard material such as resin or metal, the duct causes a pipe resonance according to the duct length or the duct diameter, so that the sports sound generated by the sound piece or the resonance pipe is generated by the duct and the dash. The balance between frequency and sound pressure changes while being transmitted to the passenger compartment via the board, causing a problem that the comfort and the feeling of force of the intake sound are reduced.

  The present invention has been made to solve the above-described problems, and is for a vehicle that can faithfully transmit so-called sports sound generated by a sound piece or a resonance pipe to a vehicle interior regardless of the arrangement of the sound piece or the resonance pipe. The present invention relates to an air supply device.

  According to the first aspect of the present invention, there is an intake pipe that introduces outside air into a vehicle engine and an intake sound that is communicated with the intake pipe and that is generated when the outside air passes through the intake pipe. An intake sound amplifier that amplifies the intake sound having a specific frequency in the frequency band; and a sound guide duct that is formed of a fibrous material and introduces the intake sound amplified by the intake sound amplifier into the passenger compartment. The present invention relates to a vehicle air intake device.

  In the vehicle intake device, the air supplied to the engine passes through the intake pipe and is sucked into the engine from the intake manifold of the engine.

  Since the intake of air into the engine is intermittent, intake pulsation occurs in the intake pipe, thereby generating intake noise.

  Here, since the intake pipe is provided with an intake sound amplifier, the intake sound amplifier amplifies the intake sound having a specific frequency comfortable for the driver's ear, and attenuates the intake sound of other frequencies. A so-called sport sound is generated.

  The generated sports sound is introduced into the vehicle compartment by the sound guide duct with almost no change in the balance between frequency and sound pressure.

  The invention according to claim 2 is the vehicle according to claim 1, wherein the intake pipe has an air cleaner that filters outside air and an air cleaner hose that introduces outside air filtered by the air cleaner into an engine of the vehicle. The present invention relates to an intake device.

  In the vehicle air intake device, intake air pulsation occurs in the air cleaner hose and the air cleaner, thereby generating an intake sound. Here, since the intake sound amplifier communicates with the air cleaner or the air cleaner hose, only a specific frequency component is amplified among intake sounds generated in the air cleaner hose and the air cleaner, and intake sounds of other frequencies are Attenuates and produces a sports sound.

  A third aspect of the present invention relates to the vehicle intake device according to the second aspect, wherein the intake pipe has an intake duct for introducing outside air into an air cleaner.

  In the vehicle intake device, an intake sound is generated in any of the intake duct, the air cleaner, and the air cleaner hose, but an intake sound amplifier that communicates with any of the intake duct, the air cleaner, and the air cleaner hose is provided. Therefore, among the intake sounds generated by the intake duct, the air cleaner, and the air cleaner hose, those having a specific frequency are amplified by the intake sound amplifier to generate a sports sound. The generated sports sound is guided into the vehicle interior by a sound guide duct.

  A fourth aspect of the present invention relates to the vehicle air intake device according to the second or third aspect, wherein the sound guide duct is opened at a dashboard of the vehicle or in the vicinity thereof.

  In the vehicle air intake device, the sound guide duct opens at or near the dashboard of the vehicle, so that the sports sound generated by the intake sound amplifier is directly introduced into the vehicle compartment from the dashboard.

  The invention according to claim 5 relates to the vehicle air intake device according to any one of claims 1 to 4, wherein the sound guide duct is formed of a nonwoven fabric.

  In the vehicle air intake device, since the non-woven fabric is used as the fibrous material forming the sound guide duct, the sound guide duct itself without an auxiliary member is different from the case where a normal woven fabric is used as the fiber material. The shape can be maintained.

  According to a sixth aspect of the present invention, the intake sound amplifier is provided in a resonant tube having one end communicating with the air cleaner hose, and hermetically provided inside or at the other end of the resonant tube, and is generated in the resonant tube. 6. A vibrating body that vibrates in resonance with intake pulsation, wherein one end of the sound guide duct is connected to the other end of the resonance tube of the intake sound amplifier. It relates to the vehicle intake device described in 1.

  In the vehicle intake device, the sports sound generated in the vibrating body is introduced from the other end of the resonance tube into the vehicle interior through the sound guide duct.

  According to a seventh aspect of the present invention, the intake sound amplifier includes a resonance pipe whose one end communicates with a branch pipe branched from the air cleaner hose or the intake duct, and the resonance pipe has an inner diameter larger than that of the branch pipe. A large expansion chamber, and a vibrating body that is provided inside the expansion chamber and vibrates in resonance with the intake pulsation generated in the expansion chamber, and one end portion of the sound guide duct is the intake sound amplifier. The vehicle intake device according to any one of claims 1 to 5, which is connected to the other end of the resonance tube.

  In the vehicle air intake device, the sports sound generated in the vibrating body is introduced from the other end of the extension pipe into the vehicle compartment through the sound guide duct.

  According to the first aspect of the present invention, even if the intake sound amplifier can be installed only at a position where the sports sound generated as it is cannot be introduced into the vehicle interior due to positional constraints, An air supply device for a vehicle that can be faithfully transmitted indoors is provided.

  According to the second aspect of the present invention, there is provided a vehicle air supply device that can faithfully transmit the sports sound generated by the intake sound amplifier to the vehicle interior even when the air cleaner is interposed in the intake pipe line.

  According to the third aspect of the present invention, the sports sound generated by the intake sound amplifier is also generated in the vehicle having the air cleaner in which the intake pipe is interposed and the intake duct provided on the upstream side of the air cleaner. An air supply device for a vehicle that can be faithfully transmitted indoors is provided.

  According to the invention of claim 4, since the sports sound generated by the intake sound amplifier is directly introduced into the vehicle interior from the dashboard, compared with the case where the sports sound is introduced into the vehicle interior through the bulkhead, The change in the balance of frequency and sound pressure when transmitted to the passenger compartment is further suppressed.

  According to the invention of claim 5, since the sound guide duct has sufficient rigidity to maintain the shape without the auxiliary member, the auxiliary member for maintaining the shape of the sound guide duct becomes unnecessary.

  According to the sixth aspect of the present invention, the intake sound amplifier is provided with a resonance pipe having one end communicating with the air cleaner hose, and an intake air generated in the resonance pipe in an airtight manner inside or on the other end of the resonance pipe. There is provided a vehicle air supply device that can faithfully transmit a sports sound to a vehicle interior even if the vehicle air intake device has a vibrating body that vibrates in resonance with pulsation.

  According to the seventh aspect of the present invention, in the vehicle intake device, the resonance tube of the intake sound amplifier includes an expansion chamber communicating with the branch pipe and a vibrating body provided inside the expansion chamber. Even if it exists, the air supply apparatus for vehicles which can transmit a sports sound faithfully to a vehicle interior is provided.

FIG. 1 is a schematic diagram illustrating an overall configuration of an intake device according to the first embodiment. FIG. 2 is a cross-sectional view illustrating the internal structure of the resonance tube included in the intake device according to the first embodiment. FIG. 3 is a cross-sectional view illustrating an internal structure of another example of the resonance tube included in the intake device according to the first embodiment. FIG. 4 is a schematic diagram illustrating an overall configuration of the intake device according to the second embodiment. FIG. 5 is an enlarged view showing the configuration of the resonance tube and the vicinity thereof in the intake device shown in FIG. FIG. 6 shows the sports sound generated in the intake device according to the first embodiment, the sports sound radiated into the vehicle interior through the sound guide duct, and the vehicle interior when the sound guide duct is changed from a non-woven tube to a resin tube. It is a graph which shows the comparison of the frequency distribution of the radiated sport sound.

1. Embodiment 1
Hereinafter, an example of a vehicle intake device of the present invention will be described with reference to the drawings. In FIG. 1 and subsequent drawings, arrows FR, RE, R, and L respectively indicate the front side of the vehicle, the rear side of the vehicle, the right side toward the front of the vehicle, and the left side toward the front of the vehicle.

  As shown in FIG. 1, the engine 4 is arranged inside an engine compartment 5 in which a right side and a left side are defined by a side panel 3 and a rear side is defined by a dash panel 22. An intake device 1 as an example of a vehicle intake device of the present invention is connected to an intake manifold 41 of the engine 4.

  The intake device 1 includes an intake duct 6, an air cleaner 7 that filters outside air introduced by the intake duct 6, and an air cleaner hose 8 that connects the air cleaner 7 and the intake manifold 41.

  A branch pipe 9 branches from the air cleaner hose 8, and one end of a resonance pipe 10 as an example of an intake sound amplifier is connected to the tip of the branch pipe 9. The resonance tube 10 is connected to one end of a sound guide duct 11 made of a nonwoven fabric as an example of a fibrous material at the other end. The other end portion of the sound guide duct 11 is opened in the vicinity of the dash panel 22, and the intake sound radiated from the sound guide duct 11 is radiated into the vehicle interior 20 through the dash panel 22. . A dashboard 21 is attached to the vehicle compartment 20 side of the dash panel 22.

  As shown in FIG. 2, the resin tube 12 having the flange portion 12a and the resin tube 13 having the flange portion 13a are connected by the flange portion 12a and the flange portion 13a to constitute the resonance tube 10. A connection end 10 a on the side connected to the branch pipe 9 in the resonance tube 10 is formed on the resin tube 12, and an open end 10 b on the side connected to the sound guide duct 11 is formed on the resin tube 13. The vicinity of the flange portion 13 a in the resin pipe 13 is a large diameter portion 14, and the portion closer to the open end 10 b than the large diameter portion 14 is a small diameter portion 15 having an outer diameter and an inner diameter smaller than those of the large diameter portion 14.

  A first vibrating body 16 as an example of a vibrating body in the present invention is disposed inside the large diameter portion 14. On the other hand, a second vibrating body 17 as another example of the vibrating body of the present invention is disposed inside the small diameter portion 15 in the resin tube 13.

  The first vibrating body 16 is made of resin, and as shown in FIG. 2, a bellows portion 16b, a flange portion 16a formed at one end of the bellows portion 16b so as to expand radially outward, and a bellows portion 16b. And the vibration surface 16c formed at the other end of the. The bellows portion 16b, the flange portion 16a, and the vibration surface 16c are integrally formed, and the bellows portion 16b and the vibration surface 16c have an outer diameter larger than the inner diameter of the open end 10b of the resonance tube 10. The first vibrating body 16 is held at a predetermined position inside the large diameter portion 14 by sandwiching the flange portion 16 a between the flange portion 12 a of the resin tube 12 and the flange portion 13 a of the resin tube 13.

  The second vibrating body 17 is made of resin or elastomer and has the same outer diameter as the inner diameter of the small diameter portion 15. Therefore, the outer diameter of the second vibrating body 17 is smaller than the outer diameters of the bellows portion 16b and the vibrating surface 16c of the first vibrating body 16. In addition, although the one 2nd vibrating body 7 may be provided as shown in FIG. 2, two or more may be provided in the small diameter part 15 as shown in FIG.

Hereinafter, the operation of the intake device 1 will be described.
When the engine 4 is rotating, air is sucked into the engine 4 from the intake device 1 through the intake manifold 41. Here, since the engine 4 normally has four cycles, air is sucked into the engine through the intake device 1 only when the engine 4 is in the intake process. Therefore, intake pulsation occurs inside the intake device 1.

  Here, since the resonance tube 10 is connected to the air cleaner hose 8 of the intake device 1 via the branch pipe 9, the first vibration inside the resonance tube 10 is caused by the intake pulsation generated inside the intake device 1. The body 16 and the second vibrating body 17 vibrate. Here, the first vibrating body 16 vibrates at a frequency determined by the inner diameters of the large diameter portion 14 and the small diameter portion 15 and the length of the large diameter portion 14 in the resonance tube 10, and the second vibrating body 17 has a small diameter. Resonance occurs at a frequency determined by the inner diameter and length of the portion 15. As a result, a so-called sports sound having a frequency distribution indicated by a broken line in FIG. 6 is generated.

  The sports sound generated in the resonance tube 10 is radiated from the open end 10b through the sound guide duct 11 into the vehicle compartment 20 via the dash panel 22. The frequency distribution of the sports sound radiated into the passenger compartment 20 is shown by a solid line in FIG.

  Since the sound guide duct 11 is formed of a non-woven fabric, resonance does not occur regardless of the length or inner diameter of the sound guide duct 11. Accordingly, since the sports sound can be transmitted without affecting the frequency distribution of the sports sound transmitted through the sound guide duct 11, the sports sound generated in the resonance tube 10 can be transmitted as shown by the solid line and the broken line in FIG. There is almost no difference in frequency distribution with the sports sound transmitted through the sound guide duct 11 and radiated into the passenger compartment 20. Therefore, the sports sound generated in the resonance tube 10 is introduced into the passenger compartment 20 with almost no change in the balance between frequency and sound pressure.

  On the other hand, when a resin pipe is used for the sound guide duct 11, pipe resonance occurs in accordance with the length and inner diameter of the pipe. Therefore, as shown by a two-dot chain line in FIG. The frequency component of the sports sound that is transmitted and radiated into the passenger compartment 20 is significantly different from the frequency distribution of the sports sound generated in the resonance tube 10. Therefore, the sport sound introduced into the passenger compartment 20 differs greatly from the sport sound generated in the resonance tube 10 in the balance of frequency and sound pressure.

  Further, depending on the arrangement of the intake manifold 41, the air cleaner hose 8, the air cleaner 7, and the intake duct 6 in the intake device 1, the open end 10b of the resonance tube 10 may not be directed to the dash panel 22 side. Even in such a case, the sports sound generated by the resonance tube 10 can be introduced into the passenger compartment 20 with high fidelity.

  Further, since the sound guide duct 11 is made of nonwoven fabric and has a certain degree of rigidity, a member for supporting the sound guide duct 11 and maintaining a predetermined shape can be omitted.

  In the first embodiment, the example in which the resonance tube 10 communicates with the air cleaner hose 8 has been described. However, the resonance tube 10 may communicate with the intake duct 6.

2. Embodiment 2
Hereinafter, another example of the vehicle intake device of the present invention will be described with reference to the drawings. 4 and 5, the same reference numerals as those in FIGS. 1 to 3 indicate the same elements as those shown in FIGS. 1 to 3 unless otherwise specified.

  As shown in FIGS. 4 and 5, in the intake device 2 according to the second embodiment, the resonance pipe 18 is branched from the intake duct 6 of the present invention.

  A diaphragm-like vibrating body 19 is provided at the tip of the resonance tube 18. The vibrating body 19 has the same configuration as the second vibrating body 17 in the first embodiment.

  Furthermore, the tip of the resonance tube 18 is inserted into one end of the sound guide duct 11.

  The example in which the resonance pipe 18 is branched from the intake duct 6 has been described above. However, the resonance pipe 18 may be branched from the air cleaner hose 8 or branched from both the intake duct 6 and the air cleaner hose 8. It may be.

  Hereinafter, the operation of the intake device of the second embodiment will be described.

  When the engine 4 is rotating, air is sucked into the engine 4 from the intake device 1 through the intake manifold 41. Here, since the engine 4 normally has four cycles, air is sucked into the engine through the intake device 2 only when the engine 4 is in the intake process. Therefore, intake pulsation occurs inside the intake device 2.

  Here, since the resonance tube 18 branches off from the intake duct 6 of the intake device 2, the vibration body 19 provided in the resonance tube 18 vibrates due to the intake pulsation generated inside the intake device 2. Here, the vibrating body 19 vibrates at a frequency determined by the inner diameter and length of the resonance tube 18. Thereby, a so-called sports sound is generated.

  The sports sound generated in the resonance tube 18 is radiated into the passenger compartment 20 through the sound guide duct 11 and the dash panel 22.

  The intake device 2 of the second embodiment has a feature that the configuration is further simplified in addition to the features of the intake device 1 of the first embodiment. Even when the space between the resonance tube 18 and the vibrating body 19 is not sealed, the outside air flowing in from the resonance tube 18 is filtered by the air cleaner 7 and supplied to the engine 4. However, the outside air is not directly introduced into the engine 4.

DESCRIPTION OF SYMBOLS 1 Intake device 2 Intake device 4 Engine 6 Intake duct 7 Air cleaner 8 Air cleaner hose 9 Branch pipe 10 Resonant pipe 11 Sound guide duct 14 Large diameter part 15 Small diameter part 16 Vibrator 17 Vibrator 18 Resonant pipe 19 Vibrator 20 Car body 21 Dashboard 22 Dash panel

Claims (7)

An intake line for introducing outside air into the vehicle engine;
An intake sound amplifier that communicates with the intake pipe and amplifies an intake sound having a specific frequency out of a frequency band of an intake sound generated when outside air passes through the intake pipe;
A sound guide duct that is made of a fibrous material and introduces the intake sound amplified by the intake sound amplifier into the passenger compartment,
A vehicle air intake device comprising:   2. The vehicle intake device according to claim 1, wherein the intake pipe includes an air cleaner that filters outside air and an air cleaner hose that introduces outside air filtered by the air cleaner into an engine of the vehicle.   The vehicle intake device according to claim 2, wherein the intake pipe has an intake duct for introducing outside air into an air cleaner.   4. The vehicle intake device according to claim 2, wherein the sound guide duct is opened in a dashboard of the vehicle or in the vicinity thereof.   The vehicle intake device according to any one of claims 1 to 4, wherein the sound guide duct is formed of a nonwoven fabric. The intake sound amplifier is
A resonance pipe having one end communicating with the air cleaner hose or the intake duct;
A vibrating body that is airtightly provided inside or at the other end of the resonance tube and vibrates in resonance with an intake pulsation generated in the resonance tube;
Have
The vehicle intake device according to any one of claims 2 to 5, wherein one end portion of the sound guide duct is connected to the other end portion of a resonance tube of the intake sound amplifier. The intake sound amplifier includes a resonance pipe having one end communicating with a branch pipe branching from the air cleaner hose or the intake duct,
The resonance tube has an expansion chamber having an inner diameter larger than that of the branch pipe, and a vibrating body that is provided inside the expansion chamber and vibrates in resonance with an intake pulsation generated in the expansion chamber,
The vehicle intake device according to any one of claims 1 to 5, wherein one end portion of the sound guide duct is connected to the other end portion of a resonance tube of the intake sound amplifier.

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