JP2009167975A - Intake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intake device increasing an installation flexibility in mounting of an acoustic means. <P>SOLUTION: The intake device is installed near a dash panel 4 separating an engine room 2 and a cabin 5 in which occupants get of an automobile 1 and is provided with a surge tank 13 supplying intake air sucked form an intake pipe 10 into a cylinder of the engine 6 via an intake manifold 14, The surge tank 13 is provided with an acoustic member 20 generating sound with using pulsation of intake air. The acoustic member 20 comprises: a resonance pipe 21 of which one end part is connected to the surge tank 13 and of which another end part opens toward the dash panel 4 and a cowl 4a; and an oscillation body 22 provided in the resonance pipe 21 and oscillated by intake air pulsation. Acoustic wave in a predetermined frequency band out of acoustic wave generated by oscillation of the oscillation body 22 is amplified. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an intake device, and more particularly to an intake device provided with acoustic means for increasing intake sound.

  Conventionally, sound resulting from the operation of an engine as an internal combustion engine mounted on a vehicle such as an automobile has been required to have a sound quality that suits the user's preference as a so-called engine sound. In particular, in SUV (Sport Utility Vehicles) cars, powerful engine sound is required, and in order to obtain powerful engine sound, there is an explosion n-order component (n = 1, 2,...) Some of them increase the frequency component sound.

This type of conventional intake system is equipped with a sound generator as acoustic means provided in the intake pipe between the air cleaner and the throttle valve upstream of the surge tank, and this sound generator transmits intake pulsation in the intake system. A transmission tube, a vibration body that is provided at one end of the transmission pipe portion, vibrates due to intake pulsation, and is connected to the transmission pipe via the vibration body. There has been known one constituted by a resonance tube that amplifies a sound wave in a predetermined frequency band corresponding to an explosion n-order component sound (for example, see Patent Document 1).
JP 2007-170228 A

  However, in such a conventional intake device, since the sound generator is provided in the intake pipe between the air cleaner and the throttle valve, it is difficult to secure a space for installing the sound generator.

  That is, in general, in an engine room of an automobile, various devices such as an engine, an intake / exhaust device, a radiator, and a battery are mounted in the engine room. In particular, since the intake pipe has a flexible configuration, it is installed in the engine room by bending or the like in order to effectively use the space in the engine room.

  In other words, the intake pipe is often installed in a narrow space in the engine room, and in the conventional intake device, the sound generator is further installed in the narrow space where the intake pipe is installed. The degree of freedom of installation has become very low.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide an intake device that can increase the degree of freedom of mounting acoustic means.

  In order to achieve the object, the intake device according to the present invention is (1) installed in the vicinity of a dash panel that separates an engine room of a vehicle from a passenger compartment, and takes in intake air sucked from an intake pipe. In an intake device having a surge tank supplied to a cylinder of an internal combustion engine via a manifold, the surge tank is provided with acoustic means for generating sound by using pulsation of intake air, and the acoustic means has one end. Is connected to the surge tank, and has a resonance tube whose other end is open toward the passenger compartment, and a vibration body that is provided inside the resonance tube and vibrates due to intake pulsation. Among the sound waves generated by vibration, a sound wave in a predetermined frequency band is amplified by the resonance tube.

  With this configuration, since the acoustic means is provided in the surge tank provided in the vicinity of the dash panel, the acoustic means can be installed by utilizing the space between the surge tank and the dash panel, and the acoustic means can be freely installed. The degree can be improved.

  In addition, since the acoustic means is installed in the vicinity of the dash panel with high acoustic sensitivity, the sound output from the acoustic means is resonated by the dash panel, thereby further enhancing the radiation of the intake sound into the passenger compartment. A certain sound can be obtained.

  (1) In the intake device of (1), (2) the acoustic means is provided in a space between a cowl provided above the dash panel and the surge tank, and the other end of the resonance tube is the cowl. It is comprised from what is opening toward.

  With this configuration, since the acoustic means can be installed in the vicinity of the cowl having high acoustic sensitivity, the sound emitted from the acoustic means is resonated by the cowl, thereby further enhancing the emission of the intake sound into the vehicle interior. Powerful sound can be obtained.

In the intake device of (1), (3) the other end portion of the resonance tube is configured to be exposed to the vehicle interior through the dash panel.
With this configuration, the intake sound output from the acoustic means can be directly introduced into the passenger compartment, so that powerful sound can be obtained.

  In the intake device of any one of the above (1) to (3), (4) a part of the resonance tube is housed inside the surge tank so that the vibrating body is located inside the surge tank It is composed of

  With this configuration, since the acoustic means is built in the surge tank, the installation space for the acoustic means in the engine room can be further reduced, and the degree of freedom of installation of the acoustic means can be further improved.

  ADVANTAGE OF THE INVENTION According to this invention, the intake device which can increase the freedom degree of mounting of an acoustic means can be provided.

Hereinafter, an embodiment of an intake device according to the present invention will be described with reference to the drawings.
(First embodiment)
FIGS. 1-9 is a figure which shows 1st Embodiment of the intake device which concerns on this invention.

First, the configuration will be described.
FIG. 1 is a schematic view of an engine room 2 of an automobile as viewed from above the automobile 1 constituting the vehicle, and the front side shows the front of the automobile 1. In FIG. 1, the engine room 2 is defined by a side panel 3 and a dash panel 4, and the dash panel 4 separates the engine room 2 and a passenger compartment 5 on which a passenger is boarded.

  The engine room 2 accommodates a 6-cylinder engine 6 as an internal combustion engine. The automobile 1 according to the present embodiment includes an FF (front engine engine) in which the extension direction of the axle is parallel to the extension direction of the crankshaft. Front drive) type.

  The engine 6 includes an intake system 7 for supplying air to the engine 6, and the intake system 7 includes an air cleaner 8, a throttle valve 9, an intake pipe 10, and a dust side duct 12. In the intake system 7, an intake port 11 for taking in air is opened on the front side of the automobile 1, and this intake port 11 communicates with an air cleaner 8 that purifies the intake air taken in through a dust side duct 12. Yes.

  The air cleaner 8 purifies the intake air by removing dust in the intake air by a filter element provided inside, and introduces the purified intake air into the intake pipe 10.

  The throttle valve 9 is adapted to vary the opening area of the intake pipe 10 in conjunction with an accelerator pedal (not shown), and adjusts the amount of intake air introduced into the cylinder of the engine 6.

  The intake air introduced into the intake pipe 10 from the air cleaner 8 is introduced into the surge tank 13 after the intake air amount is adjusted by the throttle valve 9. The surge tank 13 is provided in the vicinity of the dash panel 4 and has six intake manifolds 14 as shown in FIG.

The intake manifold 14 communicates with the combustion chamber in each cylinder of the engine 6, and the intake air branched from the surge tank 13 to the intake manifold 14 is guided into the combustion chamber by the intake negative pressure of the engine 6. The intake air pulsation is generated inside the intake system 7 by the operation of transmitting the intake air to the engine 6 and the reciprocating motion of a piston (not shown) provided in the cylinder and an intake valve (not shown) provided in the cylinder head. Yes.
In the present embodiment, a sound wave in a predetermined frequency band is amplified by the acoustic member 20 as acoustic means using the intake pulsation as an excitation source.

  As shown in FIGS. 3 and 4, the acoustic member 20 is provided in the surge tank 13. The acoustic member 20 has one end connected to the surge tank 13 and an opening 21 a at the other end. A cylindrical resonance tube 21 and a vibrating body 22 provided inside the resonance tube 21 and vibrating by intake pulsation are provided, and a sound wave in a predetermined frequency band among the sound waves generated by the vibration of the vibrating body 22 is resonated. Amplification is performed by the tube 21.

  The vibrating body 22 is made of rubber, resin, cone paper, or the like that vibrates due to intake pulsation. In addition, a spring 23 is provided in the resonance tube 21, and this spring 23 presses the vibrating body 22 toward the surge tank 13 to prevent the vibrating body 22 from being slackened. It has become.

  The acoustic member 20 is installed in a space between the cowl 4a provided above the dash panel 4 and the surge tank 13, and the opening 21a opens toward the cowl 4a. That is, the opening 21a of the resonance tube 21 opens toward the vehicle compartment 5 via the dash panel 4 and the cowl 4a.

  In the acoustic member 20 having such a configuration, the vibrating body 22 vibrates using the intake air pulsation generated inside the intake system 7 as an excitation source. The sound wave in the frequency band is amplified by the resonance tube 21 by air column resonance.

FIG. 5 is a diagram showing the sound pressure level of the intake sound when intake air is sucked into the intake port 11, where the vertical axis shows the engine speed (rpm) and the horizontal axis shows the frequency (Hz). Yes.
In FIG. 5, in the 6-cylinder engine 6, when the rotational speed of the engine 6 increases, the frequency band in which the sound pressure level (the dense portion) becomes high is the rotation tertiary component (explosion primary component) and rotation It differs depending on the 6th order component (explosion secondary component) and the 9th rotation component (explosion tertiary component). When the engine 6 reaches 5000 rpm or more, the sound of the rotation 3rd order component and the rotation 6th order component It can be seen that the pressure level is increasing.

  Further, the air sucked into the intake system 7 from the intake port 11 becomes the intake pulsation of the intake system 7, and the sound pressure level of the intake sound when introduced into the inlet of the resonance tube 21 of the acoustic member 20 is shown in FIG. As shown. In FIG. 6, the frequencies of the rotation third-order component and the rotation sixth-order component having a high sound pressure level when the rotation speed of the engine 6 is 5000 rpm or higher are 280 Hz, 530 Hz, and 730 Hz, respectively.

  Therefore, in the present embodiment, by adjusting the length, volume, and diameter of the opening 21a of the resonance tube 21, the vibrating body 22 is vibrated using the intake pulsation generated in the intake system 7 as an excitation source, Among the sound waves generated by the vibration of the vibrating body 22, sound waves having the frequency of the rotation third-order component or the rotation sixth-order component are amplified by the resonance tube 21 by air column resonance, and the sound output from the resonance tube 21 is further displayed on the dash panel. 4 and the cowl 4a are propagated into the passenger compartment 5. At this time, as shown in FIG. 7, the sound pressure level of the intake sound in the passenger compartment 5 is the sound pressure level of the intake sound having the frequency of the tertiary rotation component or the rotation sixth component when the rotational speed of the engine 6 is 5000 rpm or more. Increased significantly.

  Further, as shown in FIG. 8, when the acoustic member 20 is not provided in the intake system 7, the sound pressure level of the intake sound of the intake system 7 is substantially the same as when the intake air is sucked into the intake port 11. As a matter of course, the intake sound level does not increase.

  Thus, in this embodiment, since the acoustic member 20 is provided in the surge tank 13 provided in the vicinity of the dash panel 4, the acoustic member 20 is installed using the space between the surge tank 13 and the dash panel 4. The degree of freedom of installation of the acoustic member 20 can be improved.

  In addition, since the opening 21a of the resonance tube 21 is opened toward the cowl 4a, the sound output from the acoustic member 20 is resonated by the dash panel 4 and the cowl 4a having high acoustic sensitivity, so that the cabin 5 of the intake sound is obtained. A powerful sound can be obtained by further emphasizing the inward radiation.

  In the present embodiment, the opening 21a is opened toward the cowl 4a. However, as shown in FIG. 9, the opening 21a of the resonance tube 21 is exposed in the vehicle compartment 5 through the dash panel 4. You may do it. In this way, since the intake sound output from the acoustic member 20 can be directly introduced into the passenger compartment 5, powerful sound can be obtained.

  In this embodiment, the acoustic member 20 is provided outside the surge tank 13, but a part of the resonance tube 21 is disposed so that the vibrating body 22 is located inside the surge tank 13 as shown in FIG. 10. May be stored inside the surge tank 13.

In this way, since the acoustic member 20 can be built in the surge tank 13, the installation space of the acoustic member 20 in the engine room 2 can be reduced, and the degree of freedom of installation of the acoustic member 20 can be further increased. This can be further improved.
Further, in the present embodiment, the spring 23 in which the vibration body 22 is loosened is provided, but the spring 23 may not be provided.

(Second Embodiment)
FIGS. 11-15 is a figure which shows 2nd Embodiment of the intake device which concerns on this invention, and attaches | subjects the same number to the structure similar to 1st Embodiment, and abbreviate | omits description.
In FIG. 11, a six-cylinder engine 32 is housed in the engine room 2 as an internal combustion engine. In the automobile 31 of the present embodiment, the extension direction of the axle is perpendicular to the extension direction of the crankshaft. It is an extended FR (front engine / rear drive) type.

The engine 32 includes an intake system 33 for supplying air to the engine 32, and the intake system 33 includes an air cleaner 8, a throttle valve 9, and intake pipes 34 and 35.
The intake pipe 35 is branched from the intake pipe 34 and connected to a pair of surge tanks 36 and 37. The intake air introduced from the air cleaner 8 into the intake pipes 34 and 35 is adjusted by the throttle valve 9. After that, the surge tanks 36 and 37 are introduced.

  The surge tanks 36 and 37 are provided in the vicinity of the dash panel 4 and above the engine 32, and have three intake manifolds 38 and 39, respectively, as shown in FIG.

The intake manifolds 38 and 39 communicate with combustion chambers in the respective cylinders of the engine 32, and intake air branched from the surge tanks 36 and 37 to the intake manifolds 38 and 39 is caused by intake negative pressure of the engine 32. Guided into the combustion chamber. The intake air pulsation is generated inside the intake system 33 by the operation of transmitting the intake air to the engine 32 and the reciprocating motion of an unillustrated piston provided in the cylinder and an unillustrated intake valve provided in the cylinder head. Yes.
In the present embodiment, sound waves in a predetermined frequency band are amplified by the acoustic members 40 and 41 using the above-described intake pulsation as an excitation source.

  As shown in FIGS. 13 and 14, the acoustic members 40 and 41 are provided in the surge tanks 36 and 37, and the acoustic members 40 and 41 are connected to the surge tanks 36 and 37 at one end, Among the sound waves generated by the vibration of the vibrating body 43, a cylindrical resonant tube 42 having an opening 42 a at the other end and a vibrating body 43 provided inside the resonant pipe 42 and vibrating by intake pulsation are provided. A sound wave in a predetermined frequency band is amplified by the resonance tube 42.

  The vibrating body 43 is made of rubber, resin, cone paper, or the like that vibrates due to intake pulsation. Further, a spring 44 is provided in the resonance tube 42, and the spring 44 prevents the slackening of the vibrating body 43 by pressing the vibrating body 43 toward the surge tanks 36 and 37. It is like that.

  The acoustic members 40 and 41 are installed in a space between the cowl 4a provided above the dash panel 4 and the surge tanks 36 and 37, and the opening 42a opens toward the cowl 4a. . That is, the opening 42a of the resonance tube 42 opens toward the vehicle compartment 5 via the dash panel 4 and the cowl 4a.

  Even in the acoustic members 40 and 41 according to the present embodiment, the vibrating body 43 vibrates using the intake pulsation generated inside the intake system 33 as an excitation source, similarly to the acoustic member 20 according to the first embodiment. Therefore, among the sound waves generated by the vibration of the vibrating body 43, a sound wave in a predetermined frequency band is amplified by the resonance tube 42 by air column resonance, and the cowl 4a and the dash panel 4 are resonated, thereby The radiation to can be emphasized more, and powerful sound can be obtained. Note that the sound pressure level of the intake sound in the passenger compartment 5 is substantially the same as in FIG.

  Further, in the present embodiment, the opening 42a is opened toward the cowl 4a. However, as in the first embodiment, the opening 42a of the resonance tube 42 is passed through the dash panel 4 in the vehicle compartment 5. You may make it expose to. In this way, the intake sound output from the acoustic members 40 and 41 can be directly introduced into the passenger compartment 5 as in the first embodiment, so that powerful sound can be obtained.

  In the present embodiment, the acoustic members 40 and 41 are provided outside the surge tanks 36 and 37. However, as shown in FIG. 15, the vibrating body 43 is positioned inside the surge tanks 36 and 37. A part of the resonance tube 42 may be accommodated in the surge tanks 36 and 37.

In this way, since the acoustic members 40 and 41 can be built in the surge tanks 36 and 37, the installation space for the acoustic members 40 and 41 in the engine room 2 can be further reduced. The degree of freedom of installation of 41 can be further improved.
Further, in the present embodiment, the spring 44 that causes slack in the vibrating body 43 is provided, but the spring 44 may be omitted.

  The embodiment disclosed this time is illustrative in all respects and is not limited to this embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  As described above, the intake device according to the present invention has an effect that the degree of freedom of mounting the acoustic means can be increased, and is useful as an intake device including an acoustic member that increases intake sound.

It is a figure showing a 1st embodiment of an air intake device concerning the present invention, and is a schematic structure figure of an engine room of a car seen from the upper part of a car. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is a top view of a surge tank. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is a schematic side view of the surge tank in an engine room seen from the side of the motor vehicle. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is sectional drawing of a surge tank. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is a figure which shows the sound pressure level of intake sound when intake air is attracted | sucked by an inlet port. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is a figure which shows the sound pressure level of the intake sound of the inlet_port | entrance of the resonance pipe of an acoustic member. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is a figure which shows the sound pressure level of the intake sound propagated from a sound member to a vehicle interior. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is a figure which shows the sound pressure level of the intake sound in a vehicle interior when there is no acoustic member. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is a schematic side view of the surge tank of the other structure in the engine room seen from the side of the motor vehicle. It is a figure which shows 1st Embodiment of the intake device which concerns on this invention, and is sectional drawing of the surge tank of another shape. It is a figure which shows 2nd Embodiment of the intake device which concerns on this invention, and is a schematic block diagram of the engine room of the motor vehicle seen from the upper direction of the motor vehicle. It is a figure which shows 2nd Embodiment of the intake device which concerns on this invention, and is a top view of a surge tank. It is a figure which shows 2nd Embodiment of the intake device which concerns on this invention, and is a schematic side view of the surge tank in an engine room seen from the side of the motor vehicle. It is a figure which shows 2nd Embodiment of the intake device which concerns on this invention, and is sectional drawing of a surge tank. It is a figure which shows 2nd Embodiment of the intake device which concerns on this invention, and is sectional drawing of the surge tank of another shape.

Explanation of symbols

1,31 Car (vehicle)
2 Engine room 4 Dash panel 4a Cowl 5 Car compartment 6, 32 Engine (internal combustion engine)
10, 34, 35 Intake pipe 13, 36, 37 Surge tank 14, 38, 39 Intake manifold 20, 40, 41 Acoustic member (acoustic means)
21, 42 Resonant tube 21a, 42a Opening 22, 43 Vibrating body

Claims (4)

A surge tank is installed in the vicinity of the dash panel that separates the engine room of the vehicle from the passenger compartment in which the occupant is boarded, and supplies the intake air drawn from the intake pipe into the cylinder of the internal combustion engine through the intake manifold. In the intake system,
The surge tank is provided with acoustic means for generating sound using the pulsation of intake air,
The acoustic means includes a resonance tube having one end connected to the surge tank and the other end opened toward the vehicle compartment, and a vibrating body provided inside the resonance tube and vibrating due to intake pulsation. And amplifying sound waves in a predetermined frequency band among sound waves generated by vibration of the vibrating body with the resonance tube. The acoustic means is provided in a space between a cowl provided above the dash panel and the surge tank, and the other end of the resonance tube is open toward the cowl. The intake device according to claim 1. The intake device according to claim 1, wherein the other end portion of the resonance tube is exposed to the vehicle interior through the dash panel. The claim according to any one of claims 1 to 3, wherein a part of the resonance tube is housed inside the surge tank so that the vibrating body is located inside the surge tank. The inhaler described.

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