JPH0932667A - Air cleaner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To furnish an air cleaner main body with a function to reduce an intake sound 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: Diaphragms 7a, 7b on which through holes 14, 15 for air flow are formed are arranged in an 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 an 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 an air intake system for 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. It is normal.

FIGS. 10 and 11 show a conventional air cleaner device 30 installed in an engine room of an automobile. In FIG. 10, 31 is an air cleaner body.
Reference numeral 32 is an air introduction tube, 33 is an air outlet tube, and 34 is an acoustic tube called a resonator. Air cleaner body 3 described above
As shown in FIG. 11, 1 includes an air cleaner case 35 including 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 held 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 held 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 an air cleaner device that supplies air from an air outlet pipe to an engine, a diaphragm having through holes for air circulation is arranged in the air cleaner case.

Further, according to the present invention, the diaphragm is attached to the element or the air cleaner case through an elastic member.

In the present invention, a weight member is attached to the diaphragm.

Further, according to the present invention, a cylindrical bent portion having a through hole is formed by bending on the diaphragm so that the cylindrical bent portion functions as an acoustic tube for resonance.

[0013]

[Function] The vibration (pulsation) of the air generated in the engine is converted from the sound energy to the vibration energy by the diaphragm so that the sound deadening effect is exhibited. Further, since the diaphragm has a plurality of through-holes formed, when the flow of air into and out of these through-holes becomes violent, the vibration of the diaphragm is absorbed by the turbulence of the air flow, and this effect provides a silencing function. It will be exhibited more effectively. Further, by attaching the diaphragm to the element or the air cleaner case via the elastic member, or by attaching the weight member to the element, the natural frequency related to the vibration of the element is lowered, and the vibration of the element at a certain frequency is reduced. As the amplitude increases, a better silencing function is exhibited.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 shows an air cleaner device 1 of the present invention which is housed and arranged in the engine room of a four-wheeled vehicle. The air cleaner device 1 includes an air cleaner body 2 for cleaning air for intake of an engine. 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 a pair of upper and lower vibrating plates 7a and 7b disposed inside the air cleaner case 5 and facing the upper and lower surfaces of the filter 6b with a space therebetween. Each has.

At the joint between the upper case 5a and the lower case 5b, a case-sealing seal rubber 8 is arranged in a sandwiched state between the upper case 5a and the lower case 5b, and the element 6 is interposed via the seal rubber 8. Is supported. 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, and accordingly, 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, in this example, the element 6 is provided in a portion of the outer peripheral portion of the frame 6a of the element 6.
Vibration plates 7a and 7b having through holes 14 and 15 for air circulation are attached to the upper and lower sides of the plate. The vibrating plates 7a and 7b of this example are members made of a flat metal plate, a rubber film, or the like and having a plurality of through holes 14 and 15 for air circulation formed at appropriate intervals. The filters 6b are arranged so as to face each other substantially parallel to each other at upper and lower portions of the filter 6b. Therefore,
These vibrating plates 7a and 7b are integrally incorporated as a part of the element 6, and the filter 6b is housed and arranged in a region surrounded by the frame 6a and the pair of vibrating plates 7a and 7b. Thus, the air cleaner case 5
The pair of vibrating plates 7a and 7b are also arranged at predetermined positions in the air cleaner case 5 as the element 6 is accommodated therein.

The air cleaner device 1 having such a configuration is
It works as follows. First, when the vibration (pulsation) of the 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 diaphragms 7a, 7b, the diaphragms 7a, 7b correspondingly generate the elements. 6 vibrates in both upper and lower parts. At this time, vibration of the air, that is, sound energy is converted into vibration energy. Since the vibrating plates 7a and 7b are provided with the through holes 14 and 15, respectively, as described above, when air comes in and out through these through holes 14 and 15 violently, the vibrating plates are disturbed by the turbulence of the air flow. 7a,
The vibration of 7b is absorbed, and the pulsation of air is attenuated. Further, there is also structural damping of the vibration plates 7a and 7b themselves,
Vibrations of a and 7b are suppressed. Therefore, the vibration energy is reduced, the intake noise of the engine is attenuated, and a sufficient silencing action is achieved.

Therefore, according to this embodiment, since the air cleaner body 2 itself has a sound deadening function, it is possible to omit connecting a large-sized acoustic tube as a separate member to the air introduction tube 3, and at the same time, the engine can be omitted. It is also possible to shorten the intake passage.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, the element rubber 6 of the air cleaner device 1 is provided with mount rubbers 19 and 20 in which the vibrating plates 7a and 7b are elastic members. It is attached via
Weight members 21 and 22 are integrally attached to these diaphragms 7a and 7b, respectively. More specifically, ring-shaped mount rubbers 19 and 20 are fixed to the frame 6a of the element 6 at the upper and lower edges of the outer periphery thereof, and the leg portions 7c are formed at the peripheral ends of the diaphragms 7a and 7b by bending. , 7d are fixed to the outer peripheral surfaces of the mount rubbers 19 and 20, respectively. Therefore, the pair of upper and lower vibrating plates 7a and 7b are supported by the element 6 in a floating state via the mount rubbers 19 and 20. Further, a weight member 21 is integrally assembled to the upper vibration plate 7a at substantially the center of the upper surface thereof, and a weight member 22 is integrally assembled to the lower vibration plate 7b at the substantially center of the lower surface thereof. There is.

In the case of such a construction, the sound deadening effect on the intake noise is basically the same as that of the above-mentioned embodiment, but according to this embodiment, the vibration is caused by the presence of the weight members 21 and 22. The natural frequencies of the plates 7a and 7b are lowered, and the amplitude of vibration of the plates 7a and 7b is increased at a certain specific frequency, so that a better silencing effect is exhibited. That is,
By arranging the weight members 21 and 22, the frequency characteristic of the muffling changes, and the pulsation of low-frequency air is reduced to muffle the noise. On the other hand, since the vibrating plates 7a and 7b are elastically supported by the mount rubbers 19 and 20 in a floating state as described above, the vibrating plates 7a and 7b are effectively vibrated by the mount rubbers 19 and 20. Is absorbed by. That is, the sound energy that causes intake noise is
Since the vibration is converted into a vibration energy by a and 7b and then absorbed by the mount rubbers 19 and 20, intake noise is prevented from being generated and a sufficient silencing function is exhibited. It should be noted that the degree of this sound deadening effect depends on the degree of elasticity of the matte rubbers 19 and 20, and is further increased by making them softer.

FIG. 4 shows a third embodiment of the present invention, in which the leg portions 7c and 7d of the diaphragms 7a and 7b are shown.
As shown in FIG. 4 and FIG. 4, in a state in which the tip bent portions 23 and 24 are bent and formed to have an L-shaped cross section and are respectively arranged on the upper and lower portions of the projecting piece 9 of the element 6, these are collectively recessed in the seal rubber 8. It is configured so as to be inserted and held in the device 10. Even when such a configuration is adopted, it is possible to exert the same silencing function as that of the above-described embodiment.

As shown in FIG. 5, the protruding piece 9 and the bent end portions 23 and 24 are individually fitted into the three recessed portions 10, 25 and 26 of the seal rubber 8 to form the element 6 and the diaphragm 7a. , 7b may be supported, or, as shown in FIG. 6, the protruding piece 9 is fitted into the recess 10 of the seal rubber 8 and the tip bent portion 23 is formed.
Between the seal rubber 8 and the upper case 5a, and the tip bent portion 24 between the seal rubber 8 and the lower case 5b.
You may make it support a and 7b.

FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, cylindrical bent portions 52 and 53 having central through holes 50 and 51 are bent and formed on diaphragms 7a and 7b, respectively. The tubular bent portions 52 and 53 are made to function as a resonance acoustic tube. If such a configuration is adopted, since the diaphragms 7a and 7b function as an acoustic tube, the air cleaner body 2 itself has a muffling function.

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, a pair of upper and lower vibrating plates 7
Although a and 7b are used, the vibrating plate 7b may be arranged only below the element 6 as shown in FIG. 7. Further, although not shown, the vibrating plate 7a is provided only above the element 6. May be provided.

Further, as shown in FIG. 8, a vibration plate 28 having one through hole 28a for relatively large air flow is arranged below the element 6, and the through hole 28a of this vibration plate 28 is used as an air cleaner. It may be arranged so as to correspond to the outlet 12 of the case 5. Further, in this case, the ring-shaped weight member 29 having the central through hole 29a is placed on the vibration plate 28 at a position corresponding to the through hole 28a, so that the pulsation of a specific frequency is attenuated with emphasis. It is also possible to let.

[0029]

As described above, according to the present invention, the vibrating plate having the through holes for air circulation is arranged in the air cleaner case. Therefore, the vibration of the air generated in the engine ( (Pulsation) reaches the internal space of the air cleaner case through the intake passage of the engine, the vibrating plate vibrates and the sound energy is converted into vibration energy, and the air flows in and out through the through holes for air circulation. The vibration of the diaphragm is damped by the turbulence of the air flow caused by the above. 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.

On the other hand, since the volume of the internal space of the air cleaner case is relatively large, the intake air to the engine can be absorbed even if the sound deadening mechanism including the diaphragm having the through holes for air circulation as described above is incorporated. Since the inflow resistance of the air cleaner does not increase, the air cleaner main body can be provided with a function of reducing intake noise (silence function) without impairing the original function of the air cleaner device. Therefore, according to the present invention, since the sound deadening mechanism is built in the air cleaner main body, the separate acoustic tube (resonator) can be omitted and the length of the intake passage of the engine can be shortened. The space for disposing the device can be reduced. Moreover, since the above-described sound deadening mechanism has a small size and a simple structure, the air cleaner device can be easily manufactured, and the manufacturing cost of the air cleaner device can be reduced.

Further, in the case of the present invention, since the element can be easily removed, it is compatible with conventional general-purpose models and is also advantageous in that respect.

Further, by attaching the diaphragm to the element or the air cleaner case through the elastic member, or by attaching the weight member to the diaphragm, the natural frequency relating to the vibration of the element is lowered, and at a certain frequency. Since the amplitude of the vibration of the element becomes large, it is possible to exhibit a better silencing effect.

[Brief description of drawings]

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

FIG. 2 is a sectional view of the air cleaner body showing the first embodiment of the present invention.

FIG. 3 is a sectional view of an air cleaner body showing a second embodiment of the present invention.

FIG. 4 is a sectional view of an air cleaner body showing a third embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view showing a modified example of the support portion of the diaphragm.

FIG. 6 is an enlarged cross-sectional view showing a modified example of another support portion of the diaphragm.

FIG. 7 is a cross-sectional view of an air cleaner body showing a modified example of the present invention.

FIG. 8 is a cross-sectional view of an air cleaner body showing another modification of the present invention.

FIG. 9 is a sectional view of an air cleaner body showing a fourth embodiment of the present invention.

FIG. 10 is a perspective view of a conventional air cleaner device.

FIG. 11 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 Elements 7a, 7b, 28 Vibration Plate 8 Seal Rubber 11 Internal Space of Air Cleaner Case 12 Discharge Ports 14, 15, 28a For Air Circulation Through hole 19,20 mount rubber 21,22,29 weight member 50,51 central through hole 52,53 tubular bent portion

Claims (4)

[Claims] 1. An air cleaner device, which cleans air introduced from an air introduction pipe into an air cleaner case by passing it through an element contained in the air cleaner case, and supplies the purified air to an engine from an air discharge pipe, a through hole for air circulation. An air cleaner device characterized in that a diaphragm having holes formed therein is arranged in the air cleaner case. 2. The air cleaner device according to claim 1, wherein the diaphragm is attached to the element or the air cleaner case through an elastic member. 3. The air cleaner device according to claim 1, wherein a weight member is attached to the diaphragm. 4. The cylindrical bent portion having a through hole is bent and formed on the diaphragm so that the cylindrical bent portion functions as an acoustic tube for resonance. Air cleaner device.