JP4367879B2 - Air cleaner for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a vehicle air cleaner.
[0002]
[Prior art]
As a vehicle air cleaner, for example, Japanese Utility Model Publication No. 56-111263 “Motorcycle Air Cleaner” is known.
According to FIG. 1 and FIG. 2 of the publication, the cleaner element 2 is housed in the cleaner box 2, and the dirty side air chamber before the air is purified by the cleaner element 4 and the air after the air is purified. An air cleaner divided into clean side air chambers, wherein an interference chamber 10 for reducing intake noise is formed below the clean side air chamber so as to protrude toward the seat 9, and an outlet 6 for connecting the carburetor 8 is provided as a fuel tank. It is formed toward one side.
[0003]
[Problems to be solved by the invention]
However, in the air cleaner, since the interference chamber 10 that reduces the intake noise is protruded toward the seat 9 below the clean side air chamber, the interference chamber 10 may interfere with other structural components. , A restriction may be imposed on the degree of freedom of layout around the vaporizer 8.
For example, when the air cleaner is disposed immediately above the engine, the air cleaner element and the like are also affected by the thermal effect of the engine.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle air cleaner that does not impose restrictions on the layout around the carburetor and can reduce the thermal influence even when it is disposed directly above the engine.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 is a vehicle air cleaner of a type in which an air cleaner element is housed in a case and the air cleaner element is divided into a dirty side air chamber and a clean side air chamber, and the air cleaner is provided on the ceiling of the dirty side air chamber. mounting elements, together with arranging the clean side air chamber above and behind the dirty side air chamber, the auxiliary air chamber arranged below the dirty side air chamber communicates with the auxiliary air chamber clean side air chamber, clean A cylindrical member for supplying air to the carburetor is provided in the side air chamber and in the rear portion of the dirty side air chamber. The lower portion of the cylindrical member protrudes downward from the lower surface of the case, and the auxiliary air chamber The lower part of the cylindrical member is arranged so as to be lined up and down on the lower surface of the case .
[0006]
In order to increase the capacity of the clean side air chamber, an auxiliary air chamber is disposed under the dirty side air chamber, and the auxiliary air chamber is communicated with the clean side air chamber. By connecting the auxiliary air chamber to the clean side air chamber, a substantial capacity of the clean side air chamber can be gained. The intake noise can be reduced by increasing the capacity of the clean side air chamber. In addition, when the rapid opening response that makes the engine response a problem is improved, that is, when a large amount of air is required in a short time, the air in the auxiliary air chamber can be used.
Furthermore, since the auxiliary air chamber is formed under the dirty side air chamber, for example, a large projecting portion is not formed, so that the degree of freedom of layout around the vaporizer can be increased.
[0007]
According to a second aspect of the present invention, the vehicle engine is tilted forward in the vehicle longitudinal direction, the carburetor is attached to the rear upper side of the forward tilted engine and along the axial direction of the tubular member, and the air cleaner is mounted in the vehicle longitudinal direction. It is characterized in that it is rearwardly tilted and placed directly above the engine.
Even when the air cleaner is disposed directly above the engine, the auxiliary air chamber can function as an effective heat insulating layer, so that the air cleaner element that is thermally weakest among the components of the air cleaner can be protected.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. “Front”, “Rear”, “Left”, “Right”, “Up”, “Down” follow the direction seen from the driver, Fr is front, Rr is rear, L is left, R is right Indicates. The drawings are to be viewed in the direction of the reference numerals.
[0009]
FIG. 1 is a side view of a motorcycle equipped with a vehicle air cleaner according to the present invention. The motorcycle 10 includes a body frame 11, a front fork 13 attached to a head pipe 12 of the body frame 11, and the front fork 13. A front wheel 14 attached to the front fork 13, a handle 15 connected to the front fork 13, a fuel tank 16 attached so as to straddle an upper front portion of the vehicle body frame 11, a seat 18 attached to an upper rear portion of the vehicle body frame 11, and a vehicle body frame 11, a power unit 19 (a combination structure of a front engine 21 and a rear transmission 22), a swing arm 23 attached to a lower rear portion of the body frame 11, and a body frame in the middle of the swing arm 23. 11 is attached to the rear suspension 24 suspended from 11 and the rear end of the swing arm 23. Consisting of wheel 25. Reference numerals 26 and 26 (26 on the back side are not shown) are main pipes of the body frame 11.
[0010]
The motorcycle 10 includes a front cowl 27 that covers the front upper part of the body frame 11, a wind screen 28 that is attached to the upper part of the front cowl 27, a side cowl 29 that covers the side part of the body frame 11, and a body frame. 11 is a full cowling type two-wheeled vehicle including a seat cowl 31 covering a lower portion of a seat 18 at a rear portion of the vehicle 11, a front fender 32 covering an upper portion of the front wheel 14, and a rear fender 33 covering a rear upper portion of the rear wheel 25.
[0011]
Here, 34L and 34R are left and right intake ducts, 35 is a cowling stay, 36 is a carburetor, 36 is an exhaust pipe, 37 is a collecting pipe, 38 is a muffler, 41 is a headlamp, 42 is a mirror, and 43 is a radiator. 44 and 44 are seat rails, 47 is a drive chain, 48 is a main stand, and 50 is a vehicle air cleaner (hereinafter abbreviated as “air cleaner 50”).
[0012]
FIG. 2 is a side view showing the arrangement of components around the vehicle air cleaner according to the present invention. The intake system of the motorcycle 10 uses left and right intake ducts 34L, 34R (not on the rear side 34R) using traveling wind. The air is taken in from (shown), this air is supplied to the air cleaner 50, the air is purified by this air cleaner 50, and clean air is supplied to the vaporizer 36.
[0013]
FIG. 3 is a perspective view showing the arrangement of parts around the vehicle air cleaner according to the present invention. The left intake duct 34L has a front duct 34a protruding from an opening 27a of the front cowl 27 (see FIG. 2) in order to suck in air. And an intermediate duct 34b for circulating air by connecting to the front duct 34a, and a rear duct 34c for supplying air to the air cleaner 50 by connecting to the intermediate duct 34b. The duct body 34b is supported on the cowling stay 35 (see FIG. 2), and the rear duct 34c is connected to the air cleaner 50. Note that the right intake duct 34R is a duct symmetrical to the intake duct 34L in plan view, and a detailed description thereof will be omitted.
The carburetor 36 is a component for vaporizing gasoline (not shown) in the float chamber 36a in a spray state and supplying it to the engine.
[0014]
FIG. 4 is an exploded perspective view of the vehicle air cleaner according to the present invention. The air cleaner 50 includes a cleaner case 51 as a case and an air cleaner element 52 housed in the cleaner case 51.
The cleaner case 51 includes a case main body 53, an upper case 54 that covers the case main body 53 from the upper surface, and a lower case 55 that covers the case main body 53 from the lower surface. 56 (... indicates a plurality, and only one is shown in the figure. The same applies hereinafter) is a set screw for fixing the upper case to the case body 53, and 57 ... is the lower case 55 attached to the case body 53. It is a set screw.
The air cleaner element 52 includes an element body 52a and a frame body 52b that supports the element body 52a.
[0015]
The case body 53 includes a first recess 53a that forms the dirty side air chamber 61, a second recess 53b that forms part of the clean side air chamber 62, and a partition that partitions the first and second recesses 53a and 53b. The first recess 53a is formed with intake ports 53d and 53d for connecting the intake ducts 34L and 34R (see FIG. 3), and the second recess 53b is formed in the carburetor 36 (see FIG. 3). A through-hole 53e (... indicates a plurality; the same applies hereinafter) of a cylindrical member 58 for supplying air, and a communication hole 53f that communicates with the lower case 55 is formed. It is.
[0016]
In addition, 53g ... is an attachment hole for attaching the upper case 54, and 53h is an attachment boss for attaching the lower case 55. Reference numeral 59 denotes a portion on which the cleaner element 52 is placed, and shows the ceiling of the dirty side air chamber 61.
[0017]
The upper case 54 is formed with an upper case recess 54a that forms a part of the clean side air chamber 62 and through holes 54b that pass through the set screws 56.
The lower case 55 is formed with a lower case recess 55a that forms the auxiliary air chamber 63 and through holes 55b of set screws 57.
[0018]
FIG. 5 is a side cross-sectional view of the vehicle air cleaner according to the present invention. By mounting the air cleaner element 52 on the ceiling 59 and attaching the upper case 54 to the case body 53, the dirty side air chamber 61, the clean side air chamber 62, It is shown that the auxiliary air chamber 63 is formed by attaching the lower case 55 to the lower surface of the case main body 53. In addition, the clean side air chamber 62 and the auxiliary air chamber 63 are communicated with each other through the communication hole 53f.
[0019]
The air cleaner 50 is a vehicular air cleaner in which an air cleaner element 52 is housed in a cleaner case 51 and is divided into a dirty side air chamber 61 and a clean side air chamber 61 by the air cleaner element 52, and the air cleaner 50 is formed on the ceiling 59 of the dirty side air chamber 61. The element 52 is attached, the clean side air chamber 62 is disposed above and behind the dirty side air chamber 61, and the auxiliary air chamber 63 is disposed below the dirty side air chamber 61. It can be said that it communicates with the chamber 62.
[0020]
That is, in order to increase the capacity of the clean side air chamber 62, an auxiliary air chamber 63 is formed under the dirty side air chamber 61, and the auxiliary air chamber 63 is communicated with the clean side air chamber 62. By making the auxiliary air chamber 63 communicate with the clean side air chamber 62, the substantial capacity of the clean side air chamber 62 can be gained. By increasing the capacity of the clean side air chamber 62, intake noise can be reduced. The air in the auxiliary air chamber 63 can be used when the response is improved due to rapid opening that makes the engine response a problem, that is, when a large amount of air is required in a short time.
Further, since the auxiliary air chamber 63 is formed under the dirty side air chamber 61, for example, a large protrusion is not formed, so that the degree of freedom of layout around the vaporizer 36 (see FIG. 3) can be increased. Can be planned.
[0021]
Next, the operation of the vehicle air cleaner 50 described above will be described.
6 (a) and 6 (b) are explanatory views of the operation of the vehicle air cleaner according to the present invention. FIG. 6 (a) shows a vehicle air cleaner 100 of a comparative example, and FIG. 6 (b) shows a vehicle air cleaner 50 of the embodiment. Show.
In (a), an air cleaner 100 has an air cleaner element 103 attached to a ceiling 102 of a dirty side air chamber 101, and a clean side air chamber 104 disposed above and behind the dirty side air chamber 101. In the case where the air cleaner 100 is disposed, the air cleaner 100 is greatly affected by heat.
[0022]
In (b), the air cleaner 50 has an air cleaner element 52 attached to the ceiling 59 of the dirty side air chamber 61, a clean side air chamber 62 is disposed above and behind the dirty side air chamber 61, and the dirty side air chamber 61 An auxiliary air chamber 63 is disposed below, and the auxiliary air chamber 63 communicates with the clean side air chamber 62.
Therefore, even when the air cleaner 50 is disposed directly above the engine 21, the auxiliary air chamber 63 can function as an effective heat insulating layer, so that the air cleaner element 52 that is the thermally weakest among the components of the air cleaner 50 is provided. Can be protected.
[0023]
FIG. 7 is a side sectional view of a vehicle air cleaner according to another embodiment of the present invention, and shows a side sectional view of a vehicle air cleaner 70 (hereinafter abbreviated as “air cleaner 70”). The same parts as those of the air cleaner 50 (see FIG. 5) are denoted by the same reference numerals, and detailed description thereof is omitted.
In the figure, 52 is an air cleaner element, 53 is a case body, 55 is a lower case, 56... 57 are set screws, 61 is a dirty side air chamber, and 63 is an auxiliary air chamber.
In the air cleaner 70, an upper partition wall 74a is provided in the upper case 74, an opening 74b is provided in the upper partition wall 74a, and an inner duct 75 is attached to the opening 74b, whereby the clean side air chamber 72 is changed to the first clean side air chamber 72A. And the second clean side air chamber 72B.
[0024]
That is, the air cleaner 70 divides the clean side air chamber 72 into a first clean side air chamber 72A and a second clean side air chamber 72B, and an inner duct 75 is provided between the first and second clean side air chambers 72A and 72B. Since they are connected, the intake noise can be reduced.
[0025]
FIG. 8 is a front sectional view of a vehicle air cleaner according to still another embodiment of the present invention, and shows a side sectional view of a vehicle air cleaner 80 (hereinafter abbreviated as “air cleaner 80”). The same parts as those of the air cleaner 50 (see FIG. 5) and the air cleaner 70 (see FIG. 7) are denoted by the same reference numerals, and detailed description thereof is omitted.
In the figure, 52 is an air cleaner element, 56... Is a set screw, 61 is a dirty side air chamber, 74 is an upper case, 74 a is an upper partition wall, 74 b is an opening 74 b, 75 is an inner duct, and 83 is a case body.
The air cleaner 80 divides the clean side air chamber 82 into a first clean side air chamber 82A and a second clean side air chamber 82B, and connects the first and second clean side air chambers 82A and 82B with an inner duct 75. In this way, the intake noise is reduced.
[0026]
In the embodiment, as shown in FIG. 2, the vehicle cleaner 50 is mounted on the motorcycle 10. However, the present invention is not limited to this, and the vehicle cleaner is a tricycle or a four-wheel vehicle. Also good.
[0027]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
Claim 1 attaches an air cleaner element to the ceiling of the dirty side air chamber, arranges the clean side air chamber above and behind the dirty side air chamber, and arranges the auxiliary air chamber below the dirty side air chamber, Since the auxiliary air chamber communicates with the clean side air chamber, a substantial capacity of the clean side air chamber can be gained. As a result, the intake noise can be reduced by increasing the capacity of the clean side air chamber. Further, when the response is improved by the rapid opening that makes the engine response a problem, that is, when a large amount of air is required in a short time, the air in the auxiliary air chamber can be used.
Furthermore, by forming the auxiliary air chamber below the dirty side air chamber, for example, a large projecting portion is not formed, so that the degree of freedom of layout around the vaporizer can be increased.
[0028]
According to the second aspect of the present invention, even when the air cleaner is disposed directly above the engine, the auxiliary air chamber can function as an effective heat insulating layer, so that the air cleaner element that is thermally weakest among the components of the air cleaner is protected. be able to.
[Brief description of the drawings]
FIG. 1 is a side view of a motorcycle equipped with a vehicle air cleaner according to the present invention. FIG. 2 is a side view showing the arrangement of parts around the vehicle air cleaner according to the present invention. FIG. 4 is an exploded perspective view of the vehicle air cleaner according to the present invention. FIG. 5 is a side sectional view of the vehicle air cleaner according to the present invention. FIG. 6 is an operation of the vehicle air cleaner according to the present invention. FIG. 7 is a side sectional view of a vehicle air cleaner according to another embodiment of the present invention. FIG. 8 is a side sectional view of a vehicle air cleaner according to still another embodiment of the present invention.
DESCRIPTION OF SYMBOLS 21 ... Engine, 50 ... Air cleaner for vehicles, 51 ... Case (air cleaner case), 52 ... Air cleaner element, 59 ... Ceiling, 61 ... Dirty side air chamber, 62 ... Clean side air chamber, 63 ... Auxiliary air chamber

Claims (2)

In a vehicle air cleaner of a type in which an air cleaner element is housed in a case and this air cleaner element is divided into a dirty side air chamber and a clean side air chamber,
An air cleaner element is attached to the ceiling of the dirty side air chamber, a clean side air chamber is disposed above and behind the dirty side air chamber, and an auxiliary air chamber is disposed below the dirty side air chamber. A chamber communicating with the clean side air chamber ;
A cylindrical member for supplying air to the vaporizer is provided in the clean side air chamber and in the rear part of the dirty side air chamber,
The lower part of this cylindrical member protrudes downward from the lower surface of the case,
An air cleaner for a vehicle, wherein the auxiliary air chamber and a lower portion of the cylindrical member are arranged so as to be lined up and down on the lower surface of the case . The engine of the vehicle tilts forward in the vehicle front-rear direction, and the carburetor is attached to the rear upper side of the forward tilted engine and along the axial direction of the cylindrical member,
The vehicle air cleaner according to claim 1, wherein the air cleaner is tilted rearward in the vehicle front-rear direction and disposed immediately above the engine.

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