JPH09236057A - Air cleaner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner device which can reduce an intake noise without accompanying the reconstruction of an engine room, and can retain excellent engine output characteristics regardless of suction of snow and water. SOLUTION: An extended part 6b communicated with the base 6a of an intake nose 6 is arranged on the nose 6, the extended part 6b is inserted in an air cleaner case 2, and a tip side opening 6d on the tip side of the extended part 6a is arranged to be slantly faced to the bottom 4a of a lower case 4 so as to be separated from a filter 5. The intake nose 6 is set longer, therefore, silencing performance is improved, and an intake noise can be favorably reduced. The extension of the intake nose 6 is so executed that it is stored in the air cleaner case 2 so that increase in cost can be suppressed to a minimum without the necessity of the reconstruction of the inside of an engine room. The tip side opening 6d is slantly faced to the bottom 4a, thereby, snow is suppressed to be guided in the filter 5, and the clogging of the filter 5 can be prevented.

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 used in a vehicle.

[0002]

2. Description of the Related Art An example of a conventional air cleaner device is shown in FIGS. In the figure, an air cleaner case 2 arranged in an engine room 1 is roughly composed of an upper case 3 and a lower case 4 integrally connected to the upper case 3. A filter 5 is provided in the air cleaner case 2 so as to be fitted to a connecting portion of the upper case 3 and the lower case 4. A cylindrical intake nose 6 is communicated with the lower case 4 to guide the air A from the intake port 7 to the air cleaner case 2 side. A discharge side pipe 9 connected to a surge tank 8 on the engine side (not shown) communicates with the upper case 3. The intake nose 6
Is connected to the resonator 10 via a pipe 11,
The intake sound (sound generated with intake pulsation) is reduced.

[0003]

By the way, it is desired to increase the length of the intake nose 6 in order to further reduce the intake noise. However, in the above-described conventional technique, the space inside the engine room 1 is limited, and the actual situation is that there is no space left to accommodate the extension of the intake nose 6. For this reason, if the extension of the intake nose 6 is to be housed, the engine room 1, peripheral members and the like need to be modified.

Further, in the prior art, it is possible that the snow S or water may be sucked in through the intake port 7. In this case, the snow S and water may be sucked into the lower case 4 as shown in FIG. 6 and then adhere to the filter 5 to cause clogging. As a measure for preventing such clogging of snow S and water, the labyrinth is provided upstream of the filter 5 so as to increase the contact area with the snow S and water and reduce the amount of snow S and water adhering to the filter 5. It is conceivable to provide a structure (not shown), but in this case, the intake resistance increases and the engine output characteristics may deteriorate.

The present invention has been made in view of the above circumstances. It is possible to reduce intake noise without modifying the engine room, and to obtain good engine output characteristics regardless of whether snow or water is taken in. An object of the present invention is to provide an air cleaner device that can maintain the above.

[0006]

In order to achieve the above object, the present invention is an air cleaner device for communicating a cylindrical intake nose with an air cleaner case, wherein the intake nose is extended into the air cleaner case and the intake nose is The end of the air cleaner case is opened in a direction away from the filter in the air cleaner.
In this case, a plurality of small holes may be formed in a portion of the intake nose inside the air cleaner case.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An air cleaner device according to an embodiment of the present invention will be described below with reference to FIGS.
The same members and portions as those shown in FIGS. 5 and 6 will not be illustrated or described as appropriate.

1 to 3, the intake nose 6 is shown.
Is composed of a tubular base portion 6a and a tubular extension portion 6b extending from the base portion 6a, and only the extension portion 6b is longer than the intake nose 6 of FIG. And extension 6
b is inserted into the air cleaner case 2 along the bottom portion 4a of the lower case 4. A curved portion 6c is formed on the distal end side of the extension portion 6a of the intake nose 6, and a distal end side opening 6d is formed by obliquely cutting the curved portion 6c. The tip side opening 6d is obliquely directed to the bottom portion 4a of the lower case 4 so as to be separated from the filter 5. A plurality of small holes 12 are formed in the vicinity of the front end side opening 6d of the intake nose 6.

In the air cleaner device constructed as described above, since the intake nose 6 is extended and set longer than the intake nose 6 of the prior art shown in FIG. 5, the muffling performance is improved,
The intake noise can be satisfactorily reduced. Since the extension of the intake nose 6 is carried out so as to be housed in the air cleaner case 2, it is not necessary to remodel the engine room 1, and the cost increase can be suppressed to the necessary minimum. Further, even if there is no space for extending the intake nose 6 in the engine room 1, the intake nose 6 can be extended.

Since the front end side opening 6d of the intake nose 6 is provided obliquely toward the bottom portion 4a of the lower case 4 so as to be separated from the filter 5, when snow S or water is sucked in as shown in FIG. S and water will be guided toward the bottom 4a of the lower case 4, that is, in the direction away from the filter 5. Therefore, it is possible to prevent the snow S and water from being guided to the filter 5, prevent clogging of the filter 5, and eventually maintain good engine output characteristics.

Snow S that has entered the air cleaner case 2
The water and water are naturally evaporated by the heat in the engine room 1 (see FIG. 5). A discharge passage for discharging the snow S or water may be provided. In this case, it is necessary to take measures such as making the opening smaller so as not to suck in snow, and the discharge passage is not blocked so that the discharged water does not remain in the discharge passage and refreeze. It is necessary to take measures (for example, do not provide a diaphragm or a bent portion).

Further, a part of the air A from the intake port 7 is
The water leaks from the small holes 12, and along with this, the snow S and water are easily attracted by the flow of the air A and easily adhere to the inner wall of the intake nose 6. Therefore, the movement of snow S or water to the filter 5 side is further suppressed, and the clogging of the filter 5 can be prevented by the amount corresponding to this.

Further, by forming the small hole 12, it is possible to adjust the substantial length of the intake nose 6 in terms of sound deadening, and thus the intake resistance, and the intake resistance is adjusted to secure desired output characteristics. In addition, the intake noise can be reduced satisfactorily.

[0014]

EXAMPLE When the applicant of the present invention measured the exterior noise value by the ISO (International Organization for Standardization) method for the air cleaner device of FIGS. 5 and 6 and the air cleaner device of FIGS. 74 dB (A) and 72.5d, respectively
It was confirmed that the noise value of B (A) was obtained, and the noise value outside the vehicle could be reduced by 1.5 dB (A) by the product of the present invention.

[0015]

According to the present invention, since the intake nose is lengthened and lengthened, the silencing performance is improved and the intake noise can be satisfactorily reduced. Since the extension of the intake nose is performed by storing it in the air cleaner case, it is not necessary to modify the engine room, and the cost increase can be minimized.

Since the end of the intake nose is opened in the direction away from the filter in the air cleaner case, even if snow or water is sucked in, the snow or water will not be guided to the filter. As a result, clogging of the filter can be prevented and good engine output characteristics can be maintained.

Since the snow and water are easily attracted to the inner wall of the intake nose by being drawn by the air flow leaking from the small holes, the movement of the snow and water to the filter side is suppressed and the filter is prevented from being clogged. it can. By forming a small hole, it is possible to adjust the substantial length of the intake nose in terms of sound deadening, and in turn the intake resistance, and adjust the intake resistance to ensure the desired output characteristics and to improve the intake sound. It can be reduced.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an air cleaner device according to an embodiment of the present invention.

FIG. 2 is a front view showing the air cleaner device.

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a schematic diagram showing an operation of the air cleaner device of FIGS. 1 to 3.

FIG. 5 is a partially cut plan view showing an example of a conventional air cleaner device.

FIG. 6 is a schematic view showing an operation of the air cleaner device.

[Explanation of symbols]

 2 Air cleaner case 4 Lower case 4a Bottom of lower case 6 Intake nose 6a Base 6b Extension 6d Tip side opening

Claims (2)

[Claims] 1. An air cleaner device for communicating a cylindrical intake nose with an air cleaner case, wherein the intake nose is extended into the air cleaner case, and an end of the intake nose in the air cleaner case is separated from a filter in the air cleaner. An air cleaner device characterized in that it is opened in the. 2. A plurality of small holes are formed in a portion of the intake nose inside the air cleaner case.
Air cleaner device described.