JPH0932669A - Air cleaner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To furnish an air cleaner main body with a function to reduce air intake noise without spoiling an original function as an air cleaner device and without enlarging the device and to omit a resonator and to shorten the air intake passage of an engine accordingly. SOLUTION: A diaphragm 7 is arranged on a point inside of an air cleaner case 5 and facing against an element 6 with an interval, a separate room 15 is provided between this diaphragm 7 and an inner surface of the air cleaner case 5 and an air flow part (air flow hole 16) to communicate an outside part of there air cleaner case 5 and the separate room 15 to each other are formed on the air cleaner case 5 in an air cleaner device to supply air introduced in the air cleaner case 5 from an air introduction pipe to an engine from an air delivery pipe by purifying it by passing it through the element 6 built in the air cleaner case 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner device for purifying air introduced from an air introduction pipe into an air cleaner case by passing it through an element incorporated in the air cleaner case and supplying the air to the engine from an air discharge pipe. For example, the present invention relates to an air cleaner device with a sound deadening function, which is used in four-wheeled vehicles and motorcycles.

[0002]

2. Description of the Related Art In the intake system of an automobile engine, an air cleaner is used to remove foreign matter such as fine powder of earth and sand contained in the air and supply purified air to the engine. Is normal.

FIGS. 4 and 5 show a conventional air cleaner device 30 installed in an engine room of an automobile. In FIG. 4, 31 is an air cleaner body, and 32 is an air cleaner body.
Is an air inlet pipe, 33 is an air outlet pipe, and 34 is an acoustic pipe called a resonator. Air cleaner body 31 described above
As shown in FIG. 5, the air cleaner case 35 includes an upper case 35a and a lower case 35b, and a ring-shaped element (filter) 36 incorporated in the air cleaner case 35.

The element 36 is supported in the air cleaner case 35 as follows.
That is, the seal rubber 37 disposed at the mating portion of the upper case 35a and the lower case 35b is attached to the element 3
The projecting piece 38 provided on the side surface of No. 6 is inserted, and under this state, the element 36 is supported at a substantially central portion of the air cleaner case 35.

Further, conventionally, an acoustic pipe 34, which is a member different from the air introducing pipe 32, is attached to an intermediate portion of the air introducing pipe 32 forming the intake passage of the air cleaner device 30, and noise generated by the engine is generated. Is actually reduced by the function of the acoustic tube 34 (the function of attenuating the sound energy at a specific frequency due to the internal air column resonance).

[0006]

However, in the conventional air cleaner device 30 as described above, it is necessary to increase the size of the acoustic tube (resonator) 34 in order to obtain a sufficient silencing effect. Therefore, in reality, it is difficult to secure the installation space for the acoustic tube 34 in the limited engine room. Moreover, since the acoustic tube 34 is often pushed into a narrow gap and arranged, its assembly is troublesome. Further, since the acoustic tube 34 is a large member, it is also disadvantageous in terms of cost.

Further, since it is necessary to dispose the acoustic tube 34, the air intake passage of the air cleaner device 30 becomes complicated, which may cause a problem that the ventilation resistance increases and the output decreases.

The present invention has been made in view of the above circumstances, and an object thereof is to maintain the original function of an air cleaner device, without causing an increase in the size of the air cleaner device. (EN) An air cleaner device having a function of reducing intake noise and capable of omitting a sound tube (resonator) and shortening an intake passage of an engine in accordance therewith. .

[0009]

In order to achieve the above object, in the present invention, the air introduced from the air introducing pipe into the air cleaner case is passed through an element incorporated in the air cleaner case to clean the air. In the air cleaner device that supplies the air from the air outlet pipe to the engine, a vibration plate is provided inside the air cleaner case, at a position facing the element with a space therebetween,
A separate chamber is provided between the vibrating plate and the inner surface of the air cleaner case, and an air circulation portion that connects the outside of the air cleaner case and the separate chamber is formed in the air cleaner case.

Further, according to the present invention, the diaphragm is attached to the air cleaner case via an elastic supporting member.

[0011]

The separate chamber provided between the diaphragm and the inner surface of the air cleaner case is at atmospheric pressure due to the existence of the air circulation portion, and the diaphragm vibrates in response to the vibration (pulsation) of the air generated in the engine. At the same time, the vibration of the diaphragm increases according to the magnitude of the pressure fluctuation of the pulsation. Therefore, sound energy is converted into vibration energy, and the silencing function is exhibited. In addition, since the vibration plate is attached to the air cleaner case via the elastic support member,
Since the vibration transmitted through the diaphragm is absorbed by the elastic support member, a better silencing function is exhibited.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows an air cleaner device 1 of the present invention housed and arranged in the engine room of a four-wheeled vehicle. The air cleaner device 1 includes an air cleaner main body 2 for cleaning air for engine intake. An air introduction pipe (inlet pipe) 3 for taking in external air into the air cleaner main body 2 and an air outlet pipe (outlet pipe) 4 for supplying the air cleaned from the air cleaner main body 2 to the engine.

As shown in FIG. 2, the air cleaner body 2 has an air cleaner case 5 formed by assembling an upper case 5a and a lower case 5b with each other, and a ring shape housed and supported in the air cleaner case 5. Element 6 (filter 6b inside frame 6a
And an oscillating plate 7 disposed inside the air cleaner case 5 at a position facing the element 6 with a space therebetween.

A seal rubber 8 for hermetically sealing the case is arranged between the upper case 5a and the lower case 5b so as to be sandwiched therebetween, and the element 6 is supported via the seal rubber 8. Has been done. More specifically, the projecting piece 9 formed integrally with the outer peripheral portion of the frame 6a of the element 6 is held in the recess 10 of the seal rubber 8 while being fitted over the entire periphery thereof, whereby the element 6 is held. Air cleaner case 5
It is supported at a central location spaced from the inner surface of the.

Thus, the air (outside air) sucked in through the air introducing pipe 3 is introduced into the internal space 11 of the air cleaner case 5 through the suction port (not shown) provided in the peripheral wall portion of the air cleaner case 5. Later frame 6a
Is guided to the filter 6b of the element 6 via the outer peripheral part of the element 6 and then supplied to the engine through the exhaust port 12 of the air cleaner case 5 and the intake passage of the engine in sequence.

Further, as shown in FIG. 2, in the present embodiment, the upper case 5 is provided inside the air cleaner case 5.
A flat vibrating plate 7 made of a metal plate, a rubber film or the like is arranged at a position near the inner surface of a and facing the upper surface of the element 6. The peripheral edge portion 7a of the vibration plate 7 is attached to the upper case 5a in a floating state via a ring-shaped elastic support member 14 made of rubber or the like. Thus, the vibration chamber 7, the upper case 5 a, and the elastic support member 14 provide a separate chamber 15 in a part of the internal space 11 of the air cleaner case 5.

Further, air circulation holes 16 are formed as air circulation portions at a plurality of appropriate places of the upper case 5a, and the outside of the air cleaner case 5 and the separate chamber 15 communicate with each other through these air circulation holes 16. Has been done.

The air cleaner device 1 having such a configuration is
It works as follows. First, when the vibration (pulsation) of air generated in the engine reaches the internal space 11 of the air cleaner case 5 through the intake passage of the engine and acts on the diaphragm 7, the diaphragm 7 vibrates accordingly. At this time, separate room 1
Since the inside of the diaphragm 5 is at atmospheric pressure, the amplitude of the diaphragm 7 becomes large according to the magnitude of the pressure fluctuation of the pulsation. Then, as the vibration of the diaphragm 7 increases and the air in the separate chamber 15 moves in and out through the air circulation hole 16, the separate chamber 1
The air pressure in 5 is attenuated and the vibration of the diaphragm 7 is absorbed,
The pulsation will be attenuated. In addition, the elastic support member 14
The vibration of the diaphragm 7 is also damped by the structural damping of the diaphragm 7 itself supported by, and the pulsation is effectively damped.
Then, the sound energy that becomes the intake noise is converted into the vibration energy by the diaphragm 7, and the intake noise of the engine is generated by the vibration damping effect by the existence of the separate chamber 15 and the vibration absorption effect by the diaphragm 7 and the elastic support member 14. Is prevented and a sufficient silencing function is exhibited.

Therefore, according to this embodiment, since the air cleaner body 2 itself has a sound deadening function, it is not necessary to connect a large-sized acoustic tube, which is a separate member, to the air introduction tube 3 and the acoustic tube can be omitted. This also makes it possible to shorten the intake passage of the engine.

FIG. 3 shows another embodiment of the present invention. In this embodiment, a plurality of air circulation holes 17a and 17 are provided.
The upper plate 18 and the lower plate 19 each having b form an upper case 5a having a double structure, and a first separate chamber 15 is formed between the lower plate 19 and the diaphragm 7, and the upper plate 18 and the lower plate 19 are formed. The second separate chamber 20 is formed between the plate 19 and the plate 19. The above-mentioned air circulation holes 17a and 17b are arranged so that their positions are displaced from each other.

According to this embodiment, the first separate chamber 15 performs the same function as in the above-described embodiment, and the second separate chamber 15 functions as a buffer chamber for air vibration. Therefore, it is possible to obtain an even greater silencing effect.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made based on the technical concept of the present invention. For example, in the above-described embodiment, the air circulation hole 16 is provided as the air circulation portion, but instead of this, the honeycomb shaped portion may be provided as the air circulation portion. Further, even if a member having high rigidity is used as a member for supporting the vibration plate 7 without using a rubber material or the like, it is possible to obtain a sound deadening effect. Separate room 15 is used as lower case 5
It may be provided on the side of b, and the number of air circulation portions including the air circulation holes 16 and the like may be singular.

[0024]

As described above, according to the present invention, the vibrating plate is disposed inside the air cleaner case at a position facing the element with a space, and the vibrating plate is provided between the vibrating plate and the inner surface of the air cleaner case. Since a separate room is provided in the air cleaner case, the air circulation part that connects the outside of the air cleaner case to the separate room is formed in the air cleaner case. You can have it. That is,
When the vibration (pulsation) of air generated by the engine reaches the internal space of the air cleaner case through the intake passage of the engine, the diaphragm starts to vibrate, but it is a separate room provided between the diaphragm and the inner surface of the air cleaner case. Is at atmospheric pressure due to the presence of the air circulation portion, the vibration of the diaphragm increases in accordance with the magnitude of the pressure fluctuation of the pulsation. Therefore,
Due to the large vibration of the diaphragm, sound energy is converted into vibration energy and is sufficiently absorbed. As a result, the intake noise of the engine is effectively reduced and the sound is silenced, so that the air cleaner body can be provided with a sound deadening function. Further, by attaching the diaphragm to the air cleaner case via the elastic supporting member, the vibration transmitted through the diaphragm is sufficiently absorbed by the elastic supporting member.
It is possible to obtain a better muffling effect.

On the other hand, since the volume of the internal space of the air cleaner case is relatively large, even if the sound deadening mechanism consisting of the diaphragm and the separate chamber is built in as described above, the inflow resistance of the intake air to the engine is large. Therefore, according to the configuration of the present invention, it is possible to provide the air cleaner device having the function of reducing intake noise in the air cleaner body without impairing the original function of the air cleaner device.

Further, according to the present invention, the sound deadening mechanism is incorporated in the air cleaner body as described above, and the sound deadening mechanism consisting of the diaphragm and the separate chamber is small and has a simple structure. In addition, the manufacturing cost of the air cleaner device can be reduced. Furthermore, since the sound deadening mechanism is built into the air cleaner body, a separate acoustic tube can be omitted and the length of the intake passage of the engine can be shortened, saving space for the air cleaner device. Can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of an air cleaner device according to the present invention.

FIG. 2 is a cross-sectional view of an air cleaner body of the air cleaner device described above.

FIG. 3 is a sectional view similar to FIG. 2, showing another embodiment of the present invention.

FIG. 4 is a perspective view of a conventional air cleaner device.

FIG. 5 is a cross-sectional view of an air cleaner body of a conventional air cleaner device.

[Explanation of symbols]

 1 Air Cleaner Device 2 Air Cleaner Main Body 3 Air Inlet Pipe 4 Air Outlet Pipe 5 Air Cleaner Case 5a Upper Case 5b Lower Case 6 Element 7 Vibration Plate 8 Seal Rubber 11 Internal Space of Air Cleaner Case 14 Elastic Support Member 15, 20 Separate Chamber 16, 17a, 17b Air Circulation Hole 18 Upper plate 19 Lower plate

Claims (2)

[Claims] 1. An air cleaner device for purifying air introduced into an air cleaner case from an air introducing pipe through an element built in the air cleaner case and supplying the purified air to an engine from an air introducing pipe, the inside of the air cleaner case. A vibration plate is arranged at a position facing the element with a space therebetween, and a separate chamber is provided between the vibration plate and the inner surface of the air cleaner case, and the outside of the air cleaner case and the separate chamber. The air cleaner device is characterized in that an air circulation part communicating with the air cleaner case is formed in the air cleaner case. 2. The air cleaner device according to claim 1, wherein the diaphragm is attached to the air cleaner case via an elastic support member.