JP2019173646A - Air cleaner device of saddle-riding type vehicle - Google Patents

Abstract

To provide an air cleaner device of a saddle-riding type vehicle, which can reduce vibration and noise of the walls of an air cleaner cover and an air cleaner case and prevent deterioration of intake efficiency.SOLUTION: An air cleaner device 7 of a saddle-riding type vehicle 1 comprises an air cleaner main body 70 having the inside which is divided into a non-purification chamber 74 and a clean chamber 73 by an air cleaner element 75 interposed between an air cleaner case 71 and an air cleaner cover 72, and an intake duct 80 attached to the air cleaner cover to communicate with the non-purification chamber, in which an air introduction opening 80a is formed in a front part of the intake duct. The air cleaner device is mounted on a swing type power unit 3. The air cleaner cover includes outer projection ribs 77 provided at least on the outer surface of an upper part thereof, and inner projection ribs 78 provided at least on the inner surface of a lower part thereof. At a vehicle height position at which the air introduction opening is formed, only the outer projection ribs between the outer projection ribs and the inner projection ribs are provided.SELECTED DRAWING: Figure 3

Description

  The present invention relates to the structure of an air cleaner device for a saddle-ride type vehicle.

In order to improve the vibration damping performance of the air cleaner device, the air cleaner cover is provided with rib-shaped protrusions on the inner surface, and the protrusions are provided at a substantially right angle to the extending direction of the peaks and valleys formed on the flat surface. Such a structure is shown, for example, in Patent Document 1 below.
In the structure in which the rib-shaped protrusion is provided on the inner surface of the air cleaner cover as shown in the following Patent Document 1, when the intake air sucked from the outside air suction port of the air cleaner cover reaches the element from the unpurified chamber, the air cleaner cover There is a possibility that the rib-like projections formed on the inner surface of the slab may interfere with each other, and there is a risk that the intake efficiency will be reduced.
Therefore, there is a demand for an air cleaner device structure that improves the vibration damping performance of the air cleaner device and does not reduce the intake efficiency.

Japanese Patent Laying-Open No. 2014-058881 (FIGS. 4, 5, 8, and 9)

  The present invention has been made in view of the above-described prior art, and provides an air cleaner device for a straddle-type vehicle that can suppress vibrations of the air cleaner cover and the wall of the air cleaner case, reduce noise, and prevent a reduction in intake efficiency. The issue is to provide.

In order to achieve the above object, the present invention
An air cleaner body that is partitioned into an uncleaned chamber and a clean chamber via an air cleaner element between an air cleaner case and an air cleaner cover, and attached to the air cleaner cover so as to communicate with the uncleaned chamber, and forward In an air cleaner device for a saddle-ride type vehicle equipped with an air intake duct formed with an air inlet and attached to a swing type power unit,
The air cleaner cover has at least an outer protruding rib provided on the outer surface of the upper portion and an inner protruding rib provided at least on the inner surface of the lower portion, and is at a vehicle height position where the air inlet is formed. An air cleaner device for a saddle-ride type vehicle, wherein only the outer protruding rib of the outer protruding rib and the inner protruding rib is provided.

According to the air cleaner device of the straddle-type vehicle having the above configuration,
The air cleaner cover is provided with the outer protrusion rib and the inner protrusion rib, which can suppress the vibration of the vehicle when the vehicle is running or the vibration of the air cleaner cover and the wall of the air cleaner case caused by the intake of outside air and the supply of combustion air. Can be reduced. Further, only the outer protrusion rib is provided at the vehicle height position where the air inlet of the air cleaner cover is provided, so that the inner protrusion rib interferes with the intake air that has passed through the air inlet and flows into the air cleaner cover. This prevents a reduction in intake efficiency.

In the above configuration,
The outer protrusion rib provided on the outer surface of the air cleaner cover may overlap with the vehicle body cover on the outer side in the vehicle width direction and be positioned on the inner side when the vehicle is stopped.
According to its configuration,
Even when the outer protrusion rib is provided on the outer surface of the air cleaner cover, the outer protrusion rib is covered with the vehicle body cover in a side view and is not visually recognized, so that the appearance can be improved.

In the above configuration,
A lower end portion of the outer protrusion rib provided on the outer surface of the air cleaner cover may be formed above the lower end edge of the vehicle body cover on the outer side in the vehicle width direction.
According to its configuration,
Since the lower end portion of the outer protruding rib is formed on the upper side along the lower end edge of the vehicle body cover, the outer protruding rib can be made difficult to view efficiently in a side view.

In the above configuration,
An upper end portion of the inner protrusion rib provided on the inner surface of the air cleaner cover may be formed along a lower end portion of the outer protrusion rib.
According to its configuration,
As the upper end of the inner protrusion rib provided on the inner surface of the air cleaner cover is formed along the lower end of the outer protrusion rib, the entire air cleaner cover can be reinforced for vibration suppression on average. The air introduced from the air inlet can be guided to be guided to the air cleaner element, and the intake efficiency can be improved.

In the above configuration,
The connecting tube and the outside air inlet duct may be disposed above a lower end portion of the outer protrusion rib.
According to the configuration, the intake air flows from the outside air inlet duct to the connecting tube via the air cleaner element along the smooth inner surface of the air cleaner cover above the lower end of the outer protruding rib, that is, above the upper end of the inner protruding rib. Thus, the intake efficiency can be improved.

In the above configuration,
The air cleaner element is located in the first region when the upper portion of the inner protruding rib is the boundary and the unpurified chamber above the first region is the first region, and the lower unpurified chamber is the second region. The area may be larger than the area located in the second region, and the outside air inlet duct may be disposed in the first region.
According to its configuration,
Since the air cleaner element has a larger area in the first region without the inner projection rib above the upper end of the inner projection rib, and the outside air inlet duct is also arranged in the first region without the inner projection rib, There is little interference of the inner protrusion rib with respect to the flow, and the intake efficiency can be improved.

In the above configuration,
The entire outer protrusion rib may be covered with a vehicle body cover on the outer side in the vehicle width direction so as not to be viewed from the outside in a side view in the entire swing range of the swing type power unit.
According to its configuration,
Since the outer protrusion rib is covered with the vehicle body cover in a side view and is not visually recognized in the entire swing range of the swing type power unit, the appearance can be improved.

According to the air cleaner device of the saddle riding type vehicle of the present invention,
The air cleaner cover is provided with the outer protrusion rib and the inner protrusion rib, which can suppress the vibration of the vehicle when the vehicle is running or the vibration of the air cleaner cover and the wall of the air cleaner case caused by the intake of outside air and the supply of combustion air. Can be reduced. Further, only the outer protrusion rib is provided at the vehicle height position where the air inlet of the air cleaner cover is provided, so that the inner protrusion rib interferes with the intake air that has passed through the air inlet and flows into the air cleaner cover. This prevents a reduction in intake efficiency.

1 is a schematic left side view of a motorcycle equipped with an air cleaner device for a saddle riding type vehicle according to the present embodiment in a state where front and rear wheels are grounded and stopped. FIG. It is a top view of the air cleaner apparatus by the II-II arrow in FIG. FIG. 3 is a left side view (outside view) of the air cleaner main body as viewed in the direction of arrows III-III in FIG. 2 in a state where the front and rear wheels are grounded and stopped as shown in FIG. 1, mainly the left side surface (outside surface) of the air cleaner cover. ) Is displayed. FIG. 4 is a right side view (inner view) of the air cleaner cover in the same state as in FIG. 3, as viewed in the direction of arrows IV-IV in FIG. 2. FIG. 5 is a bottom cross-sectional view of an intake duct and an outside air inlet duct of an air cleaner cover, as viewed from arrows VV in FIG. 3.

A straddle-type vehicle air cleaner apparatus according to an embodiment of the present invention will be described with reference to FIGS.
In the description of the present specification and the claims, the directions such as front, rear, left, right, up and down are directions of the vehicle when the power unit 3 including the air cleaner device of the saddle riding type vehicle according to the present embodiment is mounted on the vehicle. Shall be followed. In this embodiment, the vehicle is a straddle-type vehicle, specifically a scooter type motorcycle (hereinafter simply referred to as “motorcycle”).
In the figure, an arrow FR indicates the front of the vehicle, LH indicates the left side of the vehicle, RH indicates the right side of the vehicle, and UP indicates the upper side of the vehicle.

FIG. 1 to FIG. 5 relate to one embodiment of the present invention. FIG. 1 shows an outline of the left side of the motorcycle 1 according to this embodiment when the front and rear wheels 16 and 17 are grounded and stopped. Show.
In the motorcycle (the “saddle-type vehicle” in the present invention) 1 of the present embodiment, the vehicle body front portion 1A and the vehicle body rear portion 1B are connected via a low floor portion 1C, and form a skeleton of the vehicle body. The frame 2 is generally composed of a down tube 21 and a main pipe 22.
That is, the down tube 21 extends downward from the head pipe 20 of the vehicle body front portion 1A, the down tube 21 is bent horizontally at the lower end, extends rearward below the floor portion 1C, and is connected in the vehicle width direction at the rear end. A pair of left and right main pipes 22 are connected via a frame 23. The main pipe 22 forms an inclined part 22a extending obliquely upward and rearward from the connecting part, and the upper part of the inclined part 22a is further bent and substantially horizontally rearward. A horizontal portion 22b extending in the direction is formed.

A storage box 11 and a fuel tank 12 are supported between the pair of main pipes 22 in the front and rear, and an occupant seat 13 is disposed above the storage box 11 and the fuel tank 12.
On the other hand, in the vehicle body front portion 1A, a handle 14 is provided on the upper side of the head pipe 20 and a front fork 15 extends downward, and a front wheel 16 is supported on the lower end thereof.

  In the vehicle body front portion 1A, the head pipe 20 and the down directing portion of the down tube 21 are covered from the front and back by the front cover 1a and the leg shield 1b, and in the floor portion 1C, the front and rear directing portion of the down tube 21 is covered by the floor cover 1c. In the rear part 1B of the vehicle body, the main pipe 22 is covered with the body cover 1d on the left and right and the rear.

The power unit 3 is a single-cylinder four-stroke cycle water-cooled SOHC type internal combustion engine 4 at the front portion, and the cylinder axis of the cylinder is tilted largely forward to a substantially horizontal state. It is supported so that it can swing up and down.
That is, a power unit support bracket 25 projects rearwardly from the inclined portion 22a of the main pipe 22, and a swing type power unit (hereinafter simply referred to as “power unit”) 3 is vertically moved to the power unit support bracket 25 via a link member 26. It is connected and supported so that it can swing. The link member 26 is connected to the vehicle body frame 2 via a pivot shaft 27 that connects the power unit support bracket 25 in the vehicle width direction. The power unit 3 swings around the pivot shaft 27.
That is, the motorcycle 1 of the present embodiment employs an upper link support structure of the power unit 3, and as a result, a space including the catalyst device 9 is obtained below the front portion of the power unit 3.

In the power unit 3, a belt type continuously variable transmission 5 is configured from the internal combustion engine 4 to the rear, and a rear wheel 17 is provided on a rear axle 51 a that is an output shaft of a reduction gear mechanism 51 provided at a rear portion thereof.
A rear cushion 18 is interposed between the rear portion of the power unit 3 having the speed reduction mechanism 51 and the horizontal portion 22b of the rear portion of the main pipe 22.

The internal combustion engine 4 rotatably supports the unit case 30 with the crankshaft 31 oriented in the vehicle width direction, that is, the left-right direction, and a cylinder block 41, a cylinder head 42, and a head cover 43 are sequentially stacked in front of the unit case 30. Thus, the cylinder axis is fastened and tilted forward substantially horizontally.
1 shows a left unit case 30L serving as a transmission case for housing the belt-type continuously variable transmission 5 in the unit case 30, the belt-type continuously variable transmission 5 itself is housed inside the left unit case 30L. And not shown.

In the upper part of the power unit 3, the intake pipe 45 extends from the intake port 44 inlet of the upper part of the cylinder head 42 which is largely inclined forward of the internal combustion engine 4 and curves backward, and the throttle body 46 connected to the intake pipe 45 is a cylinder block. An air cleaner device 7 located above 41 and connected to the throttle body 46 via a connecting tube 47 is disposed above the belt-type continuously variable transmission 5. The intake pipe 45 is provided with an injector 48 that injects fuel toward the intake port 44.
Further, an exhaust pipe extending downward from the outlet of the exhaust port 49 at the bottom of the cylinder head 42 is bent rearward through the catalyst device 9 and biased to the right and extends rearward to connect to a muffler (not shown) on the right side of the rear wheel 17. Is done.

FIG. 2 is a top view of the air cleaner device 7 as viewed in the direction of arrows II-II in FIG.
FIG. 3 is a left side view (outside view) of the air cleaner body 70 as viewed in the direction of arrows III-III in FIG. 2 with the front and rear wheels 16 and 17 in contact with and stopped as shown in FIG. The left side surface (outer surface) of the air cleaner cover 72 is shown in FIG.
4 is a right side view (inner view) of the air cleaner cover 72 in the same state as FIG. 3 as viewed in the direction of arrows IV-IV in FIG.
5 is a cross-sectional view of the lower surface of the intake duct 80 and the outside air inlet duct 76 of the air cleaner cover 72 as viewed in the direction of arrows VV in FIG.

As shown in FIG. 2, the air cleaner device 7 includes an air cleaner body 70 having an air cleaner case 71 on the vehicle center side, an air cleaner cover 72 that is fitted to the air cleaner case 71 from the outside of the vehicle, and a clean chamber 73 that is not sandwiched therebetween. The air cleaner element 75 that defines the purification chamber 74 is fastened to each other.
An intake duct 80 is attached to the front portion of the air cleaner cover 72 and is formed so that the air introduction port 80a opens toward the front left side and communicates with the unpurified chamber 74 (see FIG. 5).

That is, an air cleaner element 75 is provided in the air cleaner body 70, and the inside of the air cleaner body 70 is partitioned by the air cleaner element 75 arranged in a flat plate shape with its surface facing in the left-right direction.
An unpurified chamber 74 is formed inside the air cleaner cover 72 on the left side of the air cleaner element 75, and an outside air inlet duct 76 connected to an intake duct 80 for sucking outside air into the unpurified chamber 74 on the front side of the air cleaner cover 72. Is formed in the front-rear direction. The outlet opening 76a, which is the downstream end of the outside air inlet duct 76, opens backward in the unpurified chamber 74 (see FIGS. 4 and 5).

  A clean chamber 73 is formed inside the air cleaner case 71 on the right side of the air cleaner element 75, and an intake outlet 71a is formed on the front side of the air cleaner case 71 to which the upstream end of the connecting tube 47 connected to the internal combustion engine 4 is connected. A connecting tube 47 for supplying the purified intake air in the clean chamber 73 to the internal combustion engine 4 via the throttle body 46 is attached forward. The downstream end of the connecting tube 47 on the intake downstream side is connected to the throttle body 46 (see FIG. 1).

  As shown in FIG. 5, an air intake duct 80 formed as a separate member is attached to the front of the air cleaner cover 72, so that foreign matter can be prevented from entering and the outside air can be directed to the left without directly flowing in from the front. Air is introduced from the opened air introduction port 80 a and turned rearward, and air is sent as intake air to the rear of the unpurified chamber 74 by the outside air inlet duct 76 formed in the air cleaner cover 72.

  Further, as shown in FIG. 3, the air cleaner element 75 facing the unpurified chamber 74 is provided on a base plate portion 75b sandwiched and held between an air cleaner case 71 and an air cleaner cover 72, and the base plate portion 75b. And a filtering unit 75a loaded in the frame 75c. When the intake air, which is inhaled outside air, passes from the unpurified chamber 74 to the clean chamber 73 in the filtering unit 75a, dust or the like in the intake air Is filtered and the intake air is purified.

  The air cleaner cover 72 has at least an outer protruding rib 77 (see FIG. 3) provided on the outer surface of the upper portion and an inner protruding rib 78 (see FIG. 4) provided at least on the inner surface of the lower portion. As shown in FIGS. 3 and 4, at the vehicle height position where the air inlet 80a of the intake duct 80 is formed, that is, at the height position of the outlet opening 76a of the outside air inlet duct 76, the outer protruding rib 77 and Of the inner protrusion rib 78, only the outer protrusion 77 is provided.

As described above, since the outer protrusion rib 77 and the inner protrusion rib 78 are provided on the air cleaner cover 72, the air cleaner cover 72 generated due to the vibration of the vehicle when the motorcycle 1 travels, or the intake of outside air or the supply of combustion air, The wall vibration of the air cleaner case 71 can be suppressed, and noise can be reduced.
Further, since only the outer protruding rib 77 is provided at the vehicle height position where the air inlet port 80a of the air cleaner cover 72 is provided, the intake air that has flowed into the air cleaner cover 72 through the air inlet port 80a is inward. The projecting ribs 78 do not interfere, and a reduction in intake efficiency is prevented.
Therefore, the air cleaner apparatus has a structure that improves the vibration damping performance of the air cleaner and does not lower the intake efficiency.

Further, as shown in FIG. 1, the outer projecting rib 77 provided on the outer surface of the air cleaner cover 72 has a body cover (a “body cover” in the present invention) 1d on the outer side in the vehicle width direction when the motorcycle 1 is stopped. It overlaps in side view and is located inside it.
Even when the unit swing type power unit 3 swings, the entire outer protruding rib 77 is covered with a body cover 1d on the outer side in the vehicle width direction so that the entire swing range is not visible from the outside in a side view.
As described above, in this embodiment, in order to avoid interference with the intake air, the inner protrusion rib 78 is not provided at the vehicle height position where the air introduction port 80a is provided, and the outer protrusion rib 77 is attached to the air cleaner cover for vibration control. Even when the outer protrusion rib 77 is provided on the outer surface of 72, the outer protrusion rib 77 is covered with the body cover 1d in a side view and is not visually recognized, so that the appearance can be improved without impairing the appearance.
Therefore, the outer protrusion rib 77 is covered with the body cover 1d in a side view and is not visually recognized in the entire swing range of the power unit 3, so that the appearance is improved.

  Further, as shown in FIG. 1, a lower end portion 77a of the outer protrusion rib 77 provided on the outer surface of the air cleaner cover 72 is formed on the upper side along the lower end edge 1da of the body cover 1d on the outer side in the vehicle width direction. Yes. That is, in FIG. 3, the lower end portion 77a of the outer protrusion rib 77 is disposed so that the rear side is inclined upward in the front-rear direction, and the lower end edge 1da of the body cover 1d is at the position indicated by the two-dot chain line in the drawing. The outer projecting rib 77 is disposed so that the rear side thereof is inclined in parallel with the lower end portion 77a of the outer protruding rib 77. Even if the outer protrusion rib 77 is not provided below the position of the lower edge 1da of the body cover 1d, the inner protrusion rib 78 is provided on the inner surface of the air cleaner cover 72. The rib 77 can be made difficult to see in side view.

As shown in FIG. 4, the upper end portion 78 a of the inner protrusion rib 78 provided on the inner surface of the air cleaner cover 72, which is disposed so that the rearwardly rises in the front-rear direction, is formed on the lower end portion 77 a of the outer protrusion rib 77. The air cleaner cover 72 as a whole can be reinforced for vibration suppression on average.
Further, the air flowing from the air inlet 80a of the suction duct 80 through the outside air inlet duct 76 into the inner surface side of the air cleaner cover 72, that is, the unpurified chamber 74 from the outlet opening 76a, has no inner protruding rib 78 in the inflow direction. The air can reach the unpurified chamber 74 without interference and can be guided so as to guide the introduced air to the air cleaner element 75 on average, thereby improving the intake efficiency.

Further, as shown in FIG. 3, the connecting tube 47 and the outside air inlet duct 76 are disposed above the lower end portion 77 a of the outer protruding rib 77.
Therefore, from the outside air inlet duct 76 along the smooth inner surface of the air cleaner cover 72 above the lower end portion 77a of the outer protruding rib 77, that is, above the upper end portion 78a of the inner protruding rib 78, the connecting tube 47 is connected via the air cleaner element 75. As a result, an intake air flow is formed and intake efficiency can be improved.

As shown in FIG. 4, when the upper end portion 78a of the inner protrusion rib 78 is the boundary, the upper unpurified chamber 74 is the first region A, and the lower unpurified chamber 74 is the second region B. The air cleaner element 75 has an area located in the first region A larger than an area located in the second region B, and the outside air inlet duct 76 is disposed in the first region A.
Therefore, the air cleaner element 75 has a larger area in the first region A where the inner protrusion rib 78 is not located above the upper end portion 78 a of the inner protrusion rib 78, and the outside air inlet duct 76 is also the first area without the inner protrusion rib 78. Since it is disposed in the region A, there is little interference of the inner protrusion rib 78 with the flow of intake air, and intake efficiency can be improved.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various other modifications are possible within the scope of the gist of the present invention. For example, the power unit and the internal combustion engine of the present invention are not limited to motorcycles, and may be widely applied to other types of saddle riding type vehicles.
For convenience of explanation, the left-right arrangement of the apparatus has been described along the illustrated embodiment. However, the arrangement is not limited thereto, and the left-right arrangement may be reversed.

DESCRIPTION OF SYMBOLS 1 ... Motorcycle, 1d ... Body cover ("body cover" in this invention), 1da ... Lower end edge, 3 ... Power unit, 4 ... Internal combustion engine, 5 ... Belt type continuously variable transmission, 7 ... Air cleaner apparatus, 30 ... Unit Case, 31 ... Crankshaft, 42 ... Cylinder head, 44 ... Intake port, 45 ... Intake pipe, 46 ... Throttle body, 47 ... Connecting tube, 70 ... Air cleaner body, 71 ... Air cleaner case, 71a ... Intake outlet, 72 ... Air cleaner Cover, 73 ... Clean chamber, 74 ... Unpurified chamber, 75 ... Air cleaner element, 75a ... Filtration part, 75b ... Base plate part, 75c ... Frame part, 76 ... Outside air inlet duct, 76a ... Outlet opening, 77 ... Outer protrusion rib , 77a ... lower end, 78 ... inner projection rib, 78a ... upper end, 80 ... intake duct, 80a ... air inlet

Claims (7)

An air cleaner body (70) whose interior is divided into an unclean chamber (74) and a clean chamber (73) via an air cleaner element (75) between the air cleaner case (71) and the air cleaner cover (72);
The swing type power unit (3) includes an intake duct (80) attached to the air cleaner cover (72) so as to communicate with the unpurified chamber (74) and having an air introduction port (80a) formed in front thereof. In the air cleaner device (7) of the saddle riding type vehicle (1) attached to the
The air cleaner cover (72) has at least an outer protruding rib (77) provided on the outer surface of the upper portion and an inner protruding rib (78) provided on the inner surface of at least the lower portion, and the air inlet ( A saddle riding type characterized in that only the outer protruding rib (77) of the outer protruding rib (77) and the inner protruding rib (78) is provided at the vehicle height position where the 80a) is formed. Vehicle air cleaner device.   The outer protrusion rib (77) provided on the outer surface of the air cleaner cover (72) overlaps with the vehicle body cover (1d) on the outer side in the vehicle width direction and is located on the inner side when the vehicle is stopped. The air cleaner apparatus for a saddle riding type vehicle according to claim 1.   A lower end portion (77a) of the outer protrusion rib (77) provided on the outer surface of the air cleaner cover (72) is above the lower end edge (1da) of the vehicle body cover (1d) on the outer side in the vehicle width direction. The air cleaner device for a saddle riding type vehicle according to claim 2, wherein the air cleaner device is formed.   The upper end portion (78a) of the inner projection rib (78) provided on the inner surface of the air cleaner cover (72) is formed along the lower end portion (77a) of the outer projection rib (77). The air cleaner device for a saddle riding type vehicle according to claim 3.   The air cleaner for a saddle-ride type vehicle according to claim 4, wherein the connecting tube (47) and the outside air inlet duct (76) are disposed above a lower end portion (77a) of the outer protrusion rib (77). apparatus.   With the upper end portion (78a) of the inner protrusion rib (78) as a boundary, the unpurified chamber (74) above the first region (A) and the unpurified chamber (74) below the second region (B) ), The air cleaner element (75) has an area located in the first region (A) larger than an area located in the second region (B), and the outside air inlet duct (76) The air cleaner device for a saddle riding type vehicle according to claim 5, wherein the air cleaner device is disposed in the first region (A).   The entire outer protrusion rib (77) is covered with a vehicle body cover (1d) on the outer side in the vehicle width direction so as not to be viewed from the outside in a side view in the entire swing range of the swing type power unit (3). 6. An air cleaner device for a saddle-ride type vehicle according to any one of claims 2 to 5, wherein:

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