JP7061033B2 - Intake device - Google Patents

Description

The present invention relates to an intake device that supplies intake air to an engine.

Some intake devices that supply intake air to an engine are provided with a resonator to reduce the sound pressure level (for example, Patent Document 1). In Patent Document 1, an expansion portion is provided in an intake duct that introduces air into the air cleaner, and a resonator is formed in this expansion portion.

Japanese Patent No. 5222006

However, in Patent Document 1, the intake device including an air cleaner, an intake duct, and a resonator becomes large. Therefore, it is difficult to mount such an intake device on a vehicle having a limited arrangement space such as a motorcycle, for example.

An object of the present invention is to provide an intake device having a compact structure and capable of reducing intake noise.

In order to achieve the above object, the intake device of the present invention includes a box-shaped cleaner case, an element arranged inside the cleaner case to filter air, and an intake duct for introducing outside air into the inside of the cleaner case. And a resonator that communicates with the intake duct. The intake duct is arranged on the first surface of the cleaner case and extends in a first direction parallel to the first surface. The resonator is arranged on the first surface adjacent to the intake duct in a second direction parallel to the first surface and orthogonal to the first direction. The intake duct and the resonator have a long shape having a longitudinal direction in the first direction.

According to this configuration, since the resonator communicating with the intake duct is provided, the sound pressure level of the intake air can be reduced. Further, the intake duct and the resonator are elongated in a first direction parallel to the first surface of the cleaner case and have a longitudinal direction, and are parallel to the first surface and orthogonal to each other in the second direction. It is adjacently arranged on the first surface. Therefore, the intake duct and the resonator can be easily accommodated within the width of the cleaner case in the second direction, and the intake duct and the resonator can be suppressed from the amount of protrusion of the cleaner case from the cleaner case in the direction orthogonal to the first surface. .. As a result, an intake device including an air cleaner, an intake duct, and a resonator can be compactly configured. As a result, the capacity of the air cleaner can be easily increased, and the air cleaner can be easily mounted on a saddle-mounted vehicle such as a motorcycle.

In the present invention, the cross section of the intake duct and the resonator may be a rectangle having a length direction in the second direction. According to this configuration, the intake duct and the resonator can be compactly configured while ensuring the required passage area of the intake duct and the capacity of the resonator.

In the present invention, the communication pipe that communicates the intake duct and the resonator may extend orthogonally to the first direction. According to this configuration, the sound pressure level of the intake air can be effectively reduced by providing the communication passage in the direction orthogonal to the first direction which is the flow direction of the intake air. In this case, a plurality of the communication pipes may be provided apart from each other in the first direction. According to this configuration, the resonator can be supported at a plurality of locations in the longitudinal direction, so that the support of the resonator is stable.

In the present invention, the cleaner case has a first case half body and a second case half body divided into two in the first direction, and is between the first case half body and the second case half body. The element may be arranged, the intake duct may be connected to the first case half body, and a cleaner outlet portion may be formed in the second case half body. According to this configuration, the intake passage can be easily formed long from the intake duct to the first case half body and the second case half body. This increases the effect of reducing the intake noise.

In the present invention, the intake duct has an upstream portion extending in the first direction and exposed to the outside, and a downstream portion extending in a dirty chamber in the cleaner case in a third direction orthogonal to the first plane. However, the downstream portion may extend longer than the intermediate portion in the third direction of the dirty chamber. According to this configuration, the intake duct can be formed long without increasing the size of the entire intake device. This increases the effect of reducing the intake noise.

In the present invention, the cleaner outlet may be composed of a funnel, the outlet of the intake duct may be arranged on one side in the second direction, and the inlet of the funnel may be arranged on the other side in the second direction. According to this configuration, the passage inside the cleaner case can be long, and the volume of the air cleaner can be easily increased.

The motorcycle of the present invention includes the intake device of the present invention, the cleaner case is arranged behind the cylinder head of the engine, the intake duct and the resonator are arranged on the rear surface of the cleaner case, and the intake duct and the said. The resonator extends in the vertical direction, outside air is introduced into the intake duct from below, and the resonator is arranged adjacent to the side of the intake duct in the vehicle width direction. According to this configuration, since the intake device is compactly configured, it is possible to prevent the intake device from interfering with other parts in a motorcycle in which the arrangement space is limited.

According to the intake device of the present invention, the sound pressure level of the intake can be reduced and the intake device can be compactly configured.

It is a side view which shows the motorcycle which provided the intake device of the engine which concerns on 1st Embodiment of this invention. It is a side view which shows the cylinder of the same intake device and the same engine. It is a perspective view which shows the intake device. It is a rear view of the intake system as seen from the rear of the vehicle body. It is a top view which shows the state which the cover body of the intake device is removed.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a motorcycle provided with an intake device according to the first embodiment of the present invention. In the present specification, "right" and "left" mean "right" and "left" as seen by the driver in the vehicle. Further, the forward direction of the vehicle is "forward" and the backward direction is "rear". Further, "upstream" and "downstream" mean "upstream" and "downstream" in the flow direction of intake air.

The body frame FR of the motorcycle of the present embodiment has a main frame 1 constituting the front half portion and a rear frame 2 constituting the rear half portion. The rear frame 2 is joined to the rear portion of the main frame 1. The main frame 1 extends from the head pipe 4 at the front end so as to be inclined downward toward the rear. The main frame 1 of the present embodiment has an upper frame 1a and a lower frame 1b. The upper frame 1a extends downward from the upper part of the head pipe 4 toward the rear. The lower frame 1b extends downwardly inclined downward from the lower part of the head pipe 4 toward the rear.

A pair of left and right front forks 6 are rotatably supported by a head pipe 4 at the front end of the main frame 1 via a steering shaft (not shown). The front wheel 8 is supported at the lower end of the front fork 6. A handle 10 is attached to the upper end of the front fork 6.

A swing arm bracket 12 is provided at the lower part of the rear end of the main frame 1. The swing arm 14 is swingably supported by the swing arm bracket 12, and the rear wheel 16 is supported by the swing arm 14.

The rear frame 2 of the present embodiment has an upper seat rail 2a and a lower reinforcing rail 2b. The seat rail 2a extends from the rear portion of the upper frame 2a so as to be inclined upward toward the rear. The reinforcing rail 2b extends rearwardly and inclined upward from the swing arm bracket 12 and is connected to the rear portion of the seat rail 2a.

In this embodiment, a pair of left and right main frames 1 and rear frames 2 are provided. Specifically, a pair of left and right upper frames 1a, lower frames 1b, seat rails 2a, and reinforcing rails 2b are provided. That is, a space for arranging the parts is formed between the left and right main frames 1 and 1 and the left and right rear frames 2 and 2.

The rider seat 18 and the passenger seat 20 are supported on the seat rail 2a. The fuel tank 22 is arranged in front of the rider seat 18 and behind the head pipe 4. The engine E is supported in the lower center of the main frame 1. The rear wheel 16 is driven by the engine E.

The engine E of the present embodiment is a single cylinder engine. However, the type of the engine E is not limited to this, and a multi-cylinder engine may be used. The engine E has a crankcase 26 that supports the crankshaft 24, a cylinder 28 that projects diagonally forward and upward from the front portion of the crankcase 26, and a cylinder head 30 above the cylinder 28.

An intake port 30a into which intake air is introduced is formed on the rear surface of the cylinder head 30. An exhaust port 30b from which exhaust gas is led out is formed on the front surface of the cylinder head 30. The exhaust pipe 32 is connected to the exhaust port 30b. The exhaust of the engine E is guided to the rear by the exhaust pipe 32 and is discharged to the outside through a muffler (not shown).

The throttle body 34 is connected to the intake port 30a. The throttle body 34 has a throttle valve (not shown) inside the throttle body 34, and adjusts the amount of intake air supplied to the engine E. An air cleaner 35 is arranged behind the cylinder head 30 and is connected to the throttle body 34. As shown in FIG. 2, the air cleaner 35 has a box-shaped cleaner case 36 and an element 38 arranged inside the cleaner case 36, and filters the air supplied to the engine E.

The intake duct 40 is arranged on the rear surface 36r, which is the first surface of the cleaner case 36. The intake duct 40 introduces outside air into the cleaner case 36. The intake duct 40 extends in the vertical direction along the rear surface (first surface) 36r of the cleaner case 36. That is, the intake duct 40 has a long shape having a longitudinal direction in the vertical direction. The intake duct 40 of this embodiment is made of nitrile rubber. However, the material of the intake duct 40 is not limited to this. The details of the structure of the intake duct 40 will be described later.

In the present specification, the surface of the cleaner case 36 on which the intake duct 40 is arranged is referred to as a first surface. The direction in which the intake duct 40 extends parallel to the first surface is defined as the first direction D1. Further, the direction parallel to the first surface and orthogonal to the first direction D1 is defined as the second direction D2. Further, the direction orthogonal to the first plane, that is, the direction orthogonal to both the first direction D1 and the second direction D2 is referred to as the third direction D3.

In the present embodiment, the rear surface 36r of the cleaner case 36 constitutes the first surface. The first direction D1 faces in the vertical direction. Here, the vertical direction generally means a direction within ± 30 ° in the vertical direction. The second direction D2 faces the vehicle width direction (left-right direction). Here, the left-right direction generally means a direction within ± 30 ° in the left-right direction. The third direction D3 faces the front-back direction. Here, the front-back direction generally means a direction within ± 30 ° in the front-back direction.

The air cleaner 35 shown in FIG. 1 is arranged above the crankcase 24 and the swing arm bracket and below the rider seat 18 with respect to the vertical direction D1 which is the first direction. Further, the air cleaner 35 is arranged between the left and right rear frames 2 and 2 in the left-right direction D2 which is the second direction. A battery 42 is arranged behind the air cleaner 35. The battery 42 supplies power to the electrical components of the motorcycle. The battery 42 is also arranged below the rider seat 18 between the left and right rear frames 2 and 2. That is, the air cleaner 35 is arranged in front of the battery 42, behind the cylinder head 30 and the throttle body 34, with respect to the front-rear direction D3, which is the third direction.

As shown in FIG. 3, the cleaner case 36 has an upper first case half body 44 and a lower second case half body 46 divided into two in the vertical direction (first direction) D1. Both case halves 44 and 46 are connected by a plurality of screw bodies 45, and the element 38 is arranged between the first case halves 44 and the second case halves 46. The cleaner case 36 is made of a resin such as polypropylene, for example. The element 38 is, for example, a polyurethane sponge. However, the materials of the cleaner case 36 and the element 38 are not limited to this.

The intake duct 40 is connected to the first case half body 44, and the cleaner outlet portion 48 is formed in the second case half body 46. As shown in FIG. 2, the cleaner outlet portion 48 of the present embodiment is composed of a funnel 48 penetrating the front wall 46f of the second case half body 46 of the air cleaner 35.

That is, the first case half body 44 constitutes the dirty chamber 50 on the upstream side of the element 38, and the second case half body 46 constitutes the clean chamber 52 on the downstream side of the element 38. The volume of the clean chamber 52 is preferably large. Also in this embodiment, the volume of the clean chamber 52 is formed larger than that of the dirty chamber 50. In other words, the second case half body 46 constitutes the case body of the cleaner case 36, and the first case half body 44 constitutes the cover body of the cleaner case 36.

As shown in FIG. 5, a mounting piece 54 projecting forward is formed on the front surface of the second case half body 46. Two mounting pieces 54 are provided side by side in the vehicle width direction. Each mounting piece 54 is formed with a bolt insertion hole 54a facing upward. The entrance 48a of the funnel 48 is open in the clean chamber 52. Specifically, the entrance 48a of the funnel 48 is arranged on the right side in the vehicle width direction in the clean chamber 52.

As shown in FIG. 2, the intake duct 40 arranged on the rear surface 36r of the cleaner case 36 has an inlet end that opens downward on the outer side of the cleaner case 36 and curves forward in the middle portion thereof to form the air cleaner 36. It is inserted and the outlet end is open in the cleaner case 36. In other words, the intake duct 40 has an upstream portion 56 exposed to the outside of the cleaner case 36 and a downstream portion 58 inside the cleaner case 36. The upstream portion 56 extends in the vertical direction D1 along the rear surface 36r of the cleaner case 36. The downstream portion 58 extends in the dirty chamber 50 in the cleaner case 36 in the front-rear direction D3.

Since the intake duct 40 is provided on the rear surface 36r of the cleaner case 36, the traveling wind does not directly hit the intake duct 40. Therefore, it is difficult for water to enter the intake duct 40. Further, since the inlet 40a is formed at the lower end of the intake duct 40 and the outside air is introduced into the intake duct 40 from below, the intrusion of water into the intake duct 40 can be further suppressed.

In the present embodiment, the downstream portion 58 extends forward longer than the intermediate portion in the front-rear direction D3 of the dirty chamber 50. Specifically, the downstream portion 58 extends from the rear end of the dirty chamber 50 to the vicinity of the front portion, and the outlet 40b of the intake duct 40 opens toward the front portion of the dirty chamber 50. By forming the intake duct 40 long in this way, the intake noise can be suppressed. However, if the intake duct 40 is too long, the intake resistance may increase and the engine performance may deteriorate.

As shown in FIG. 5, the outlet 40b of the intake duct 40 is arranged on the left side side of the cleaner case 36 in the left-right direction (vehicle width direction) D2. That is, in the present embodiment, the outlet 40b of the intake duct 40 and the inlet 48a of the funnel 48 are arranged on opposite sides in the vehicle width direction.

A resonator 60 is arranged on the rear surface 36r of the cleaner case 36. The resonator 60 communicates with the intake duct 40 to reduce the sound pressure level of the intake air. The resonator 60 of the present embodiment is made of a resin such as polyethylene and is formed by blow molding. However, the material and manufacturing method of the resonator 60 are not limited to this. The air cleaner 35, the intake duct 40, and the resonator 60 form an intake device IS that supplies intake air to the engine E.

The resonator 60 is arranged on the rear surface 36r of the cleaner case 36 adjacent to the intake duct 40 and the left-right direction (vehicle width direction) D2. In the present embodiment, the resonator 60 is arranged on the right side of the intake duct 40 in the vehicle width direction D2. The resonator 60 extends in the vertical direction D1 along the rear surface 36r of the cleaner case 36. Like the intake duct 40, the resonator 60 has a long shape having a longitudinal direction in the vertical direction D1. That is, the resonator 60 of the present embodiment has a rectangular parallelepiped shape having a longitudinal direction in the vertical direction D1.

As shown in FIG. 4, the intake duct 40 and the resonator 60 are arranged inside the cleaner case 36 in the vertical direction (first direction) D1 and the horizontal direction (second direction) D2. That is, the intake duct 40 and the resonator 60 do not protrude from the cleaner case 36 in the vertical direction D1 and the horizontal direction D2.

As shown in FIG. 3, the cross section S1 of the intake duct 40 and the cross section S2 of the resonator 60 are rectangles long in the vehicle width direction D2. Therefore, as shown in FIG. 2, the intake duct 40 and the resonator 60 do not greatly protrude from the cleaner case 36 also in the front-rear direction (third direction) D3.

The resonator 60 reduces the noise level of the intake air at the time of negative pressure. Specifically, the resonator 60 lowers a specific frequency of the intake sound. The resonator 60 also has the effect of acclimatizing the inspiratory pulsation. This improves the rider's feel.

The larger the volume of the resonator 60, the greater the effect of reducing the intake noise. Further, the resonator 60 has an ideal spherical shape. However, due to the problem of the arrangement space, in the present embodiment, the shape of the resonator 60 is a rectangular parallelepiped, and the volume is formed as large as the space allows. For example, in this embodiment, the resonator 60 is arranged along the shape of the cleaner case 36. Further, the resonator 60 has a large space having no partition inside. As a result, it is possible to obtain a large effect of reducing the intake noise, and it can be expected that the shortage of the intake amount is compensated by the air from the resonator 60 at the time of high-speed rotation of the engine E.

As shown in FIG. 4, the intake duct 40 and the resonator 60 are communicated with each other by a communication pipe 62. The communication pipe 62 extends orthogonally to the vertical direction D1. Specifically, the communication pipe 62 extends in the vehicle width direction D2. In this embodiment, two communication pipes 62 are provided so as to be spaced apart from each other in the vertical direction D1. However, the number of communication pipes 62 is not limited to this, and may be one or three or more. Further, in the present embodiment, the two communication pipes 62 have the same size, but may be different.

The communication pipe 62 has a cylindrical shape and is integrally formed with the resonator 60 in the present embodiment. Specifically, the communication pipe 62 is formed on the left side surface 60s of the resonator 60 in the vehicle width direction. The communication pipe 62 forms a communication passage 65 that connects the intake passage 66 inside the intake duct 40 and the resonator chamber 68 inside the resonator 60.

A pipe insertion hole 64 is formed on the right side surface 40s of the intake duct 40 in the vehicle width direction. Two pipe insertion holes 64 are provided so as to correspond to the communication pipe 62 and are spaced apart from each other in the vertical direction D1. By fitting the communication pipe 62 of the resonator 60 inside the pipe insertion hole 64 of the intake duct 40, the intake passage 66 inside the intake duct 40 and the resonator chamber 68 inside the resonator 60 are communicated with each other.

The communication passage 65 preferably extends in a direction orthogonal to the flow direction of the intake air. The communication passage 65 of the present embodiment extends in the vehicle width direction D2 orthogonal to the intake flow direction (vertical direction D1). Further, it is preferable to provide the communication passage 65 at a place in the intake duct 40 where the flow velocity is large. In the present embodiment, the communication passage 65 is provided in a straight portion of the intake duct 40 having a large flow velocity.

The communication passage 65 is preferably provided in a portion of the intake duct 40 having a small width. In the present embodiment, the communication passage 65 is provided on the side surface 40s in which the width (dimension of D3 in the front-rear direction) of the intake duct 40 is small. As a result, it is possible to obtain a larger intake noise reducing effect than that provided on the rear surface 40r of the intake duct 40 having a large width (dimension in the vehicle width direction D2).

The cross-sectional shape of the communication passage 65 is preferably circular. Further, the diameter and length of the communication passage 65 are determined by the frequency to be reduced. The reason why there are two communication passages 65 in this embodiment is that it is dimensionally difficult to have one communication passage 65 when the communication holes 65 are provided on the narrow side surface 40s as described above. Further, if the diameter of the communication passage 65 is too large, the air flow in the intake duct 40 may be obstructed. Therefore, by providing two communication passages 65, it is possible to secure a necessary opening area and prevent each communication passage 65 from becoming too large.

From the viewpoint of ensuring sufficient intake air, the passage area (outer shape) of the intake duct 40 should be large. However, if the outer shape of the intake duct 40 is large, the intake noise becomes loud. If the outer shape of the intake duct 40 is made smaller, the intake noise becomes smaller, but the intake resistance becomes larger, the engine performance deteriorates, and it becomes difficult to secure the required intake amount. Therefore, in the present invention, the resonator 60 is provided in a space secured by reducing the outer shape of the intake duct 40. As a result, it is possible to reduce the intake noise while ensuring the required engine performance and intake air.

If the resonator 60 shown in FIG. 2 is provided behind the intake duct 40, it may interfere with peripheral parts such as the battery 42. If the resonator 60 is provided in front of the intake duct 40, it may interfere with the clean chamber 52 of the air cleaner 35, and the capacity of the clean chamber 52 may be reduced. Therefore, in the present invention, the resonator 60 is arranged on the rear surface 36r of the cleaner case 36 on the outer side (right side) of the intake duct 40 in the vehicle width direction.

Next, the support structure of the intake device IS of the present embodiment will be described. A duct insertion hole 69 is formed on the rear surface of the first case half body 44 of the air cleaner 35 shown in FIG. The downstream portion 58 of the intake duct 40 is inserted into the duct insertion hole 69 from the rear and is joined to the first case half body 44 by a fixing means such as an adhesive. Further, the communication pipe 62 of the resonator 60 is fitted inside the pipe insertion hole 64 on the side surface 40s of the intake duct 40, and is joined to the intake duct 40 by a fixing means such as an adhesive. As a result, the air cleaner 35, the intake duct 40, and the resonator 60 are made into subunits to form the intake device IS. As described above, by separating the air cleaner 35, the intake duct 40, and the resonator 60, the production of the intake device IS becomes easy.

This subunitized intake device IS is attached to the vehicle body. As shown in FIG. 2, the cleaner outlet portion 48 of the air cleaner 35 is connected to the throttle body 34. As a result, the lower portion of the air cleaner 35 is supported by the engine E via the throttle body 34. In the present embodiment, the cleaner outlet portion 48 and the throttle body 34 are connected by a connecting member 72 such as a clamp. However, the means for connecting the cleaner outlet portion 48 and the throttle body 34 is not limited to this.

Further, the bolt 70 is inserted from above into the bolt insertion hole 54a (FIG. 5) of the mounting piece 54 of the cleaner case 36, and is fastened to the screw hole (not shown) provided in the vehicle body frame FR. That is, the upper portion of the air cleaner 35 is fixed to the vehicle body frame FR with bolts 70 via the mounting piece 54. As described above, the intake device IS is detachably attached to the vehicle body.

Next, the flow of the intake air of the intake device IS of the present embodiment will be described. When the engine E is started, the outside air (intake) A is introduced from the inlet 40a at the lower end of the intake duct 40. The intake air A flows from the upstream portion 56 of the intake duct 40 to the downstream portion 58, and is led out from the outlet 40b into the dirty chamber 50 of the air cleaner 35. The intake air A flows into the clean chamber 52 after being filtered by the element 38. The intake air A in the clean chamber 52 is supplied to the engine E from the cleaner outlet portion 48 via the throttle body 34.

At this time, as shown in FIG. 4, a part of the intake air A flowing through the upstream portion 56 of the intake duct 40 flows into the resonator chamber 68 through the communication passage 65. The intake air A resonates in the resonator chamber 68, and the intake air noise is reduced.

According to the above configuration, since the resonator 60 communicating with the intake duct 40 is provided, the sound pressure level of the intake air can be reduced. As shown in FIG. 3, the intake duct 40 and the resonator 60 have a long shape having a longitudinal direction in the vertical direction D1 and are adjacent to each other in the vehicle width direction D2 on the rear surface 36r which is the first surface of the cleaner case 36. Have been placed. Therefore, the intake duct 40 and the resonator 60 can be easily accommodated within the width of the cleaner case 36 in the vehicle width direction D2. Moreover, the amount of protrusion of the intake duct 40 and the resonator 60 rearward from the cleaner case 36 can be suppressed. As a result, the intake device IS including the air cleaner 35, the intake duct 40, and the resonator 60 can be compactly configured. As a result, the capacity of the air cleaner 35 can be easily increased, and the air cleaner 35 can be easily mounted on a motorcycle having a limited arrangement space.

The cross section S1 of the intake duct 40 and the cross section S2 of the resonator 60 are rectangles having a length direction in the vehicle width direction D2. As a result, the intake duct 40 and the resonator 60 can be compactly configured while ensuring the necessary passage area of the intake duct 40 and the volume of the resonator 60.

Since the communication pipe 62 extends in the vehicle width direction D2 orthogonal to the flow direction (vertical direction D1) of the intake air A, the sound pressure level of the intake air A can be effectively reduced. Further, since the two communication pipes 62 are provided apart from each other in the longitudinal direction (vertical direction D1), the resonator 60 can be supported at two locations in the longitudinal direction. Therefore, the support of the resonator 60 is stable.

The intake duct 40 is connected to the upper first case half body 44 shown in FIG. 2, and the cleaner outlet portion 48 is formed in the lower second case half body 46. As a result, the intake passage can be easily formed long from the intake duct 40 to the first case half body 44 and the second case half body 46. As a result, the effect of reducing the intake noise is increased.

The downstream portion 58 of the intake duct 40 extends to the front portion of the dirty chamber 50 of the air cleaner 35. As a result, the intake duct 40 can be formed long without increasing the size of the entire intake device IS. Therefore, the effect of reducing the intake noise is increased.

As shown in FIG. 5, the outlet 40b of the intake duct 40 is arranged on the left side of the vehicle width direction D2 in the air cleaner 35, and the inlet 48a of the funnel 48 is arranged on the right side of the vehicle width direction D2. As a result, the passage inside the cleaner case 36 from the outlet 40b of the intake duct 40 to the inlet 48a of the funnel 48 can be long. Therefore, the volume of the air cleaner 35 can be easily increased.

As described above, since the intake device IS is compactly configured, even if the intake device IS is arranged in a motorcycle having a limited arrangement space, for example, the intake device IS shown in FIG. 1 interferes with the battery 42. Can be prevented.

In the above embodiment, the first surface on which the intake duct 40 and the resonator 60 shown in FIG. 3 are arranged is the rear surface 36r of the cleaner case 36, and the first direction D1 extending the intake duct 40 and the resonator 60 is in the vertical direction. The second direction D2 in which the intake duct 40 and the resonator 60 are adjacent to each other is set in the left-right direction (vehicle width direction). However, the first surface, the first and the second directions D1 and D2 are not limited to this. For example, the intake duct 40 and the resonator 60 are arranged on the side surface (first surface) of the cleaner case 36, the intake duct 40 and the resonator 60 extend in the vertical direction (first direction D1), and the intake duct 40 and the resonator 60 extend. May be set so as to be adjacent to the front-rear direction (second direction D2).

The present invention is not limited to the above embodiments, and various additions, changes, or deletions can be made without departing from the gist of the present invention. For example, in the above embodiment, an example in which the intake device of the present invention is applied to a motorcycle has been described, but the intake device of the present invention can also be applied to vehicles such as vehicles and ships other than motorcycles. Further, the intake device of the present invention can be applied to an engine other than a vehicle. Therefore, such things are also included within the scope of the present invention.

35 Air cleaner 36 Cleaner case 36r Rear surface of cleaner case (first surface)
38 Element 40 Intake duct 40b Intake duct outlet 44 First case half body (cover body)
46 Second case half body (case body)
48 Cleaner exit (funnel)
48a Funnel inlet 50 Dirty chamber 52 Clean chamber 56 Upstream part of intake duct 58 Downstream part of intake duct 60 Resonator 62 Communication pipe D1 1st direction (vertical direction)
D2 2nd direction (horizontal direction, vehicle width direction)
D3 3rd direction (front-back direction)
E engine IS intake system

Claims (7)

An intake device having a box-shaped cleaner case, an element arranged inside the cleaner case to filter air, an intake duct for introducing outside air into the inside of the cleaner case, and a resonator communicating with the intake duct. It ’s a motorcycle equipped with
The intake duct is located on the first surface of the cleaner case and extends in a first direction parallel to the first surface.
The resonator is arranged on the first surface adjacent to the intake duct in a second direction parallel to the first surface and orthogonal to the first direction.
The intake duct and the resonator have a long shape having a longitudinal direction in the first direction.
The cleaner case is located behind the cylinder head of the engine.
The intake duct and the resonator are arranged on the rear surface of the cleaner case.
The intake duct and the resonator extend in the vertical direction, and outside air is introduced into the intake duct from below.
A motorcycle in which the resonator is arranged adjacent to the side of the intake duct in the vehicle width direction . The motorcycle according to claim 1, wherein the cross section of the intake duct and the resonator is a rectangle having a length direction in the second direction. The motorcycle according to claim 1 or 2, wherein the communication pipe connecting the intake duct and the resonator extends orthogonally to the first direction. The motorcycle according to claim 3, wherein a plurality of communication pipes are provided apart from each other in the first direction. In the motorcycle according to any one of claims 1 to 4, the cleaner case has a first case half body and a second case half body divided into two in the first direction.
The element is arranged between the first case half body and the second case half body.
A motorcycle in which the intake duct is connected to the first case half body and a cleaner outlet portion is formed in the second case half body. In the motorcycle according to any one of claims 1 to 5, the intake duct extends in the first direction and is exposed to the outside, and the dirty chamber in the cleaner case is the first plane. Has a downstream portion extending in a third direction orthogonal to
A motorcycle in which the downstream portion extends longer than the intermediate portion in the third direction of the dirty chamber. In the motorcycle according to any one of claims 1 to 6, the cleaner outlet is composed of a funnel.
A motorcycle in which the outlet of the intake duct is arranged on one side in the second direction and the inlet of the funnel is arranged on the other side in the second direction.

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