JPH09268954A - Air cleaner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a resonator chamber, a communicating passage, and a cleaner chamber by lower and upper cases of an air cleaner and reduce the number of part items by constituting the air cleaner case by the lower and upper cases, and arranging lower side and upper side ducts and lower side and upper side partitioning walls thereon. SOLUTION: The air cleaner case 4 of an air cleaner 2 is formed as the upper and lower two separating structure of a lower case 6 and an upper case 8, and a lower side partitioning wall 36 is arranged in a lower side outer wall 10 so as to form a resonator chamber 30, a communicating passage 32, and a cleaner chamber 34. A lower side duct 42 communicated with the cleaner chamber 34 is arranged on the lower part of the lower case 6. An upper side partitioning wall is arranged on the upper side outer wall 12 of the upper case 8 so as to form a resonator chamber, a communicating passage, and a cleaner chamber, and also an upper side duct 54 communicated with the cleaner chamber is arranged on the upper part of the upper case 8. A cleaner element 62 is interposed between upper and lower cleaner chambers.

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, and more particularly to an air cleaner device having a simple structure and capable of increasing the degree of freedom in volume and passage length of a resonator.

[0002]

2. Description of the Related Art In an engine, an air cleaner device provided with an air cleaner is provided in order to remove dust in the intake air.

Further, the air cleaner is provided with a resonator (resonator) for reducing the intake noise of the intake air. This resonator is generally attached to an opening portion provided in the intake passage before and after the air cleaner.

An air cleaner provided with a resonator is disclosed, for example, in Japanese Patent Laid-Open No. 19644/1990. The thing described in this publication, the air cleaner, by providing a resonance chamber volume control means for controlling the volume of the resonance chamber communicating with the intake space on the upstream side of the filter element, by controlling the pressure difference before and after the filter element passage, Even if the resonance chamber volume control means is downsized, a large urging force for controlling the resonance chamber volume is obtained.

[0005]

However, in the conventional air cleaner device, in order to provide the resonator,
It requires a large number of parts, increases the number of assembly steps, and has a low degree of freedom in the volume and passage length of the resonator.
There is a problem that a space for separately providing a resonator is required, resulting in an increase in size and an increase in cost.

[0006]

In order to eliminate the above-mentioned disadvantages, the present invention provides an air cleaner device having an air cleaner for removing dust in the air sucked into an internal combustion engine. A lower case and an upper case, the lower case is provided with a lower duct, the upper case is provided with an upper duct, and the lower case is provided with a lower resonator chamber, a lower communication passage, and a lower cleaner chamber. The lower side partition wall is provided so as to correspond to the lower side resonator chamber, the lower side communication passage, and the lower side cleaner chamber in the upper case, and the upper side resonator chamber, the upper side communication passage, and the upper side cleaner. An upper partition wall is provided so as to form a chamber, and between the lower cleaner chamber and the upper cleaner chamber. Characterized in that a Lina element.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Since the present invention only forms the resonator chamber, the communication passage, and the cleaner chamber by the lower case and the upper case, the degree of freedom of the volume and passage length of the resonator is increased with a simple structure. Further, the number of parts can be reduced, the number of assembling steps can be reduced, the weight and the size can be reduced, the appearance can be improved, and the cost can be reduced.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 4 show a first embodiment of the present invention. 1 and 2, reference numeral 2 is an air cleaner of the air cleaner device.

The air cleaner case 4 of the air cleaner 2 is composed of a lower case 6 and an upper case 8 which are vertically divided into two parts.

The lower case 6 has a lower side outer wall 10. Further, the upper case has an outer wall 12 on the upper side.

The lower case 6 and the upper case 8 are
The lower side flange 14 continuously provided on the lower side outer wall 10 and the upper side flange 16 continuously provided on the upper side outer wall 12 are joined and integrally connected by a plurality of connecting means 18.

The connecting means 18 is a clamp support portion 20 provided on the lower outer wall 10, and a clamp 24 which is swingable by a support pin 22 on the clamp support portion 20 and which is locked / disengaged from the upper side flange 16. Consists of.

As shown in FIG. 4, the lower case 6 is provided with a mounting portion 28 having a mounting hole 26 formed in the lower flange 14 so as to project therefrom.

In the lower side outer wall 10 of the lower case 6, as shown in FIG. 4, a lower side partition wall is formed so as to form a lower side resonator chamber 30, a lower side communication passage 32, and a lower side cleaner chamber 34. 36 is provided. The lower side partition wall 36 includes the lower side resonator chamber 30 and the lower side cleaner chamber 3.
2, a first lower side partition wall 36-1 oriented in the width direction, and a lower side communication passage 32 and a lower side cleaner chamber 34 that are connected to the first lower side partition wall 36-1. Second lower side partition wall 36-2 oriented in the longitudinal direction so as to form
Consists of

Further, as shown in FIG. 2, the lower outer wall 10 has a recessed portion 3 in which the portion of the lower communication passage 32 is recessed into a predetermined shape.
8 are formed. Therefore, in the lower case 6, the lower side communication passage 32 having the depth D1 is formed.

Further, a lower duct 42 having a lower duct hole 40 communicating with the lower cleaner chamber 34 and communicating with the lower outer wall 10 is provided at a lower portion of the lower case 6.

On the other hand, the upper side outer wall 12 of the upper case 8
As shown in FIG. 3, the lower side resonator chamber 30, the lower side communication passage 32, and the lower side cleaner chamber 34 correspond to the upper side resonator chamber 44, the upper side communication passage 46, and the upper side cleaner chamber 48, respectively. Upper partition wall 50 is provided so as to form and. This upper side partition wall 50 is
The first upper side partition wall 5 oriented in the width direction so as to form the upper side resonator chamber 44 and the lower side cleaner chamber 46.
0-1 and the second upper partition wall 50 which is oriented in the longitudinal direction so as to be connected to the first upper partition wall 50-1 to form the upper communication passage 46 and the upper cleaner chamber 48.
-2 and.

Further, the upper duct 5 having an upper duct hole 52 communicating with the upper cleaner chamber 48 and communicating with the upper outer wall 12 is provided in an upper portion of the upper case 8.
4 are provided.

The upper duct hole 52 has a communication passage 56 formed by the lower communication passage 32 and the upper communication passage 46.
And to the upper-side cleaner chamber 48.

The air cleaner 2 has a lower case 6
When the upper case 8 and the upper case 8 are coupled, the lower side communication passage 3
2 and the upper side communication passage 46 cooperate with each other to form a resonator opening 60 that opens to a resonator chamber 58 formed by the lower side resonator chamber 30 and the upper side resonator chamber 44.

Further, when the lower case 6 and the upper case 8 are connected, the lower partition wall 36 and the lower flange 1 are provided between the lower cleaner chamber 34 and the upper cleaner chamber 48.
A cleaner element 62 is provided between the upper portion 4 and the upper partition wall 50 / upper side flange 16. Therefore, the cleaner element 62 is arranged at a substantially intermediate portion of the cleaner chamber 64 formed by the lower cleaner chamber 34 and the upper cleaner chamber 48.

Next, the operation of the first embodiment will be described.

The air reaches the upper cleaner chamber 48 from the upper duct hole 52, reaches the lower cleaner chamber 34 via the cleaner element 62, and then flows out from the lower duct hole 40 to the engine side.

The intake sound propagates through the communication passage 56 formed by the lower communication passage 32 and the upper communication passage 46, and is reduced in the resonator chamber 58.

By the way, in the first embodiment, only the lower partition wall 36 and the upper partition wall 50 form the resonator chamber 58, the communication passage 56, and the cleaner chamber 64 in the air cleaner case 4. The number of parts can be reduced, the number of assembling steps can be reduced, and the price can be reduced.

Further, by changing the shapes of the lower partition wall 36 and the upper partition wall 50, the volume of the resonator chamber 58 and the passage length of the communication passage 56 can be easily changed.
The degree of freedom can be increased.

Furthermore, since the number of parts is small, the structure is simple, the weight and the size are reduced, and the resonator chamber 58 is provided in the air cleaner case 4.
The appearance can be improved.

5 to 11 show a second embodiment of the present invention.

In the second embodiment, the parts having the same functions as those in the first embodiment will be designated by the same reference numerals.

The feature of this second embodiment is that, as shown in FIGS. 5 and 6, the recess 38 of the lower outer wall 10 is made slightly smaller and the depth of the lower communication passage 32 is made smaller than that of the first embodiment. Depth D1
By making the depth D2 larger than the above, the length of the communication passage 56 is increased without changing the cross-sectional area of the communication passage 56, and the frequency bandwidth having a greater silencing effect than in the first embodiment. Is not changed much, and the frequency band is moved to the lower side.

As shown in FIG. 9, the frequency bandwidth becomes wider as the capacity of the resonator chamber 58 increases.
Further, in FIG. 9, the point P is determined by the ratio between the capacity of the resonator chamber 58 and the cross-sectional area of the communication passage 56. When the capacity of the resonator chamber 58 is halved, if the cross-sectional area of the communication passage 56 is halved, the desired frequency can be attenuated by the desired amount. However,
In this case, the attenuation of the frequencies around it will be less.

Further, as shown in FIGS. 6 and 7, the upper duct 54 of the upper duct 54 is provided with a threshold 102 so that the mounting position of the resonator with respect to the intake pipe can be changed, and the inlet opening is provided. The part 104 is formed.

Regarding the position of the inlet opening 104,
As shown in FIGS. 10 and 11, when the upper duct 54 is extended, by extending the threshold body 102 to the upper duct hole 52, air column vibration in the extended upper duct hole 52 is reduced. The inlet opening 104 is arranged at a close position (see FIG. 11). This is because the muffling effect is greater when the inlet opening 104 is closer to the hara of vibration of the air column.

In the second embodiment, even if the inlet opening 104 is arranged in this way, it can be realized without significantly changing the outer shape, and it can be made advantageous in terms of space. .

[0035]

As is apparent from the above detailed description, according to the present invention, the air cleaner case of the air cleaner is composed of the lower case and the upper case, the lower case is provided with the lower duct, and the upper case is provided with the upper duct. The lower case is provided with a lower side partition wall so as to form the lower side resonator chamber, the lower side communication passage, and the lower side cleaner chamber, and the upper case is provided with the lower side resonator chamber, the lower side communication passage, and the lower side cleaner chamber. The upper side partition wall is provided so as to form the upper side resonator chamber, the upper side communication passage, and the upper side cleaner chamber, and the cleaner element is provided between the lower side cleaner chamber and the upper side cleaner chamber. Since the lower case and the upper case only form the resonator chamber, the communication passage and the cleaner chamber,・ The degree of freedom in passage length is increased, the number of parts is reduced, the number of assembly steps is reduced, the structure is simple, the weight and size are reduced, the appearance is improved, and the price is low. You can

[Brief description of drawings]

FIG. 1 is a front view of an air cleaner.

FIG. 2 is a right side view of the air cleaner.

FIG. 3 is a plan view of an air cleaner.

FIG. 4 is a plan view of a lower case provided with a cleaner element taken along line 〓-〓 of FIG.

FIG. 5 is a front view of an air cleaner according to a second embodiment.

FIG. 6 is a right side view of the air cleaner according to the second embodiment.

FIG. 7 is a plan view of an air cleaner according to a second embodiment.

8 is a plan view of a lower case provided with a cleaner element taken along line 〓-〓 of FIG.

FIG. 9 is a diagram illustrating a frequency bandwidth.

FIG. 10 is a diagram showing a state in which the inlet opening is located away from the air column vibration hara.

FIG. 11 is a diagram showing a state in which the inlet opening is located near the hara of air column vibration.

[Explanation of symbols]

 2 Air Cleaner 4 Air Cleaner Case 6 Lower Case 8 Upper Case 30 Lower Side Resonator Chamber 32 Lower Side Communication Passage 34 Lower Side Cleaner Chamber 36 Lower Side Partition Wall 40 Lower Side Duct 44 Upper Side Resonator Chamber 46 Upper Side Communication Passage 48 Upper Side Cleaner Chamber 50 Upper side partition wall 54 Upper side duct 56 Communication passage 58 Resonator chamber 62 Cleaner element 64 Cleaner chamber

Claims (2)

[Claims] 1. An air cleaner device having an air cleaner for removing dust in air drawn into an internal combustion engine, wherein an air cleaner case of the air cleaner comprises a lower case and an upper case, and the lower case is provided with a lower duct. The upper case is provided with an upper duct, the lower case is provided with a lower partition wall so as to form a lower resonator chamber, a lower communication passage, and a lower cleaner chamber, and the upper case is provided with the lower resonator. Chamber, the lower-side communication passage, and the lower-side cleaner chamber, the upper-side partition wall is provided so as to form the upper-side resonator chamber, the upper-side communication passage, and the upper-side cleaner chamber, and the lower-side cleaner chamber. An air cleaner device comprising a cleaner element between the upper side cleaner chamber and the upper side cleaner chamber. 2. The air cleaner device according to claim 1, wherein a divider is provided in the upper duct so that a mounting position of the resonator with respect to the intake pipe can be changed.