CN110461695B - Saddle-ride type vehicle - Google Patents

Abstract

The straddle-type vehicle is provided with: an internal combustion engine (2); and side covers (24, 25) that cover side portions of the vehicle, the side covers (24, 25) including: a traveling wind intake port (32) for taking in traveling wind from the front of the vehicle; a traveling wind guide passage (39) that guides traveling wind taken in from the traveling wind intake port (32) to an intake portion of the internal combustion engine (2); and an intake air adjustment unit (41) that takes in outside air into the traveling wind guide passage (39) separately from the traveling wind intake port (32) when the intake portion side in the traveling wind guide passage (39) has a negative pressure.

Description

Saddle-ride type vehicle

Technical Field

The present invention relates to a saddle-ride type vehicle including a side cover that covers a side portion of a vehicle body.

The present application claims priority based on the Japanese patent application No. 2017-061872, filed on 3/27/2017, the contents of which are incorporated herein by reference.

Background

As a saddle-ride type vehicle such as a motorcycle, a vehicle is known which includes a side cover for covering a side portion of a vehicle body in order to reduce running resistance. In a straddle-type vehicle provided with a side cover, since the side of the internal combustion engine is covered with the side cover, the internal combustion engine needs to introduce traveling wind into the inside of the side cover for cooling and intake.

As a countermeasure for this, a straddle-type vehicle in which an intake duct for introducing traveling wind from the front of the vehicle body to the engine direction is provided inside a side cover (for example, see patent document 1), a straddle-type vehicle in which a traveling wind guide passage is provided in a side cover itself (for example, see patent document 2), and the like have been proposed.

Prior art documents

Patent document

Patent document 1: japanese patent No. 5944457 publication

Patent document 2: japanese patent application laid-open No. 61-125921

Disclosure of Invention

Problems to be solved by the invention

However, in the above-described conventional straddle-type vehicle, since the traveling wind is introduced into the internal combustion engine only from the traveling wind intake port provided at the front portion of the side cover, there is a concern that the flow rate of the introduced air from the traveling wind intake port will be insufficient when, for example, the driver suddenly opens the throttle valve. When the intake air is insufficient during the opening operation of the throttle valve, the output of the internal combustion engine is prevented from rising smoothly.

In addition, as a countermeasure for this, it is conceivable to enlarge the cross-sectional areas of the intake duct and the traveling wind guide passage, but if the cross-sectional areas of the intake duct and the traveling wind guide passage are simply enlarged, the main body portion of the side cover covering the outside of the intake duct and the traveling wind guide passage becomes large, and there is a concern that the ride comfort and the appearance of the driver are affected.

The invention provides a straddle-type vehicle capable of restraining the enlargement of a side cover and realizing the smooth rise of the output of an internal combustion engine according to the opening operation of a throttle valve.

Means for solving the problems

The saddle-ride type vehicle of the present invention adopts the following configuration.

(1) A saddle-ride type vehicle according to an aspect of the present invention includes: an internal combustion engine; and a side cover that covers a side portion of the vehicle, the side cover including: a traveling wind intake port that takes in traveling wind from the front of the vehicle; a traveling wind guide passage for guiding traveling wind taken in from the traveling wind intake port to an intake portion of the internal combustion engine; and an intake air adjusting unit that takes in outside air into the traveling wind guide passage separately from the traveling wind intake port when the intake portion side in the traveling wind guide passage becomes negative pressure.

With the configuration of the above (1), during normal running in which the operation of the throttle valve is gentle, the running wind is taken into the intake portion of the internal combustion engine through the running wind intake port of the side cover. When the throttle valve is suddenly opened by the driver and the intake portion side of the traveling wind guide passage becomes negative pressure, the outside air is taken in from the intake air adjustment portion to the intake portion of the internal combustion engine. Therefore, in the case of this configuration, sufficient outside air can be taken into the intake portion of the internal combustion engine when the intake air is insufficient without enlarging the side cover.

(2) In the aspect (1), the introduced air adjusting portion may be disposed at a position closer to an intake port of an air cleaner of the vehicle, which is provided on an intake side of the internal combustion engine, than the traveling wind intake port.

With the configuration of the above (2), when the intake port of the air cleaner becomes negative pressure due to a sudden throttle opening operation or the like, the introduced air adjusting portion provided at a position close to the intake port performs rapid supply of the outside air. Therefore, with this configuration, a more rapid increase in the output of the internal combustion engine according to the opening operation of the throttle valve can be achieved.

(3) In addition to the aspect (1) or (2), the traveling wind guide passage may include a guide wall that is disposed on an outer side in the vehicle width direction and that causes the traveling wind to flow along an inner surface of the guide wall, a mesh structure portion may be provided at least in part of the guide wall, and the introduced air adjustment portion may be configured by the mesh structure portion.

With the configuration of the above (3), during normal running of the vehicle, the running wind flows in the direction of the intake portion of the internal combustion engine along the inner surface of the guide wall of the running wind guide passage. At this time, the leakage of the traveling wind to the outside of the guide wall through the mesh structure portion is suppressed by the flow of the traveling wind along the inner surface of the guide wall. On the other hand, when the intake portion side of the internal combustion engine becomes negative pressure due to a rapid opening operation of the throttle valve, the outside air is also supplied from the outer surface side of the guide wall through the mesh structure portion. Therefore, when this structure is adopted, the introduced air adjusting portion can be formed with a simple structure.

(4) In the aspect (3) described above, the mesh structure portion may be provided in a rear region of the traveling wind guide passage so as to bulge outward in the vehicle width direction.

With the structure of the above (4), when the traveling wind intake port is viewed from the front, the mesh structure portion is less likely to be observed from the traveling wind intake port. This improves the design of the vehicle. Further, since the mesh structure portion is provided in the bulging portion bulging outward in the vehicle width direction, the traveling wind taken in from the traveling wind intake port can be further suppressed from leaking through the mesh structure portion.

(5) In the aspect of (4) above, the mesh structure portion may be provided at an inclined portion of the guide wall, the inclined portion being inclined inward in the vehicle width direction with respect to an upstream portion of the traveling wind guide passage extending from the traveling wind intake port toward the vehicle rear side.

With the configuration of the above (5), since the mesh structure portion is provided on the inclined portion of the guide wall that is inclined inward in the vehicle width direction, the traveling wind smoothly flows toward the intake portion side of the internal combustion engine along the inner surface of the inclined portion without being discharged from the mesh structure portion of the guide wall to the outside during normal traveling of the vehicle. When the water flow hits the outer surface of the inclined portion of the guide wall from the vehicle rear side during vehicle washing or the like, the water flow flows toward the outside in the vehicle width direction along the outer surface of the inclined portion of the guide wall. Therefore, the water flow is less likely to enter the vehicle interior in the direction of the air intake portion through the mesh structure portion during vehicle washing or the like.

(6) In the aspect (1) to (5) above, the introduced air adjusting portion may be provided on one side of the vehicle, and the intake port 31 of the air cleaner 27 of the vehicle provided on the intake side of the internal combustion engine may be provided toward the other side of the vehicle.

With the configuration of the above (6), even if water droplets enter the traveling wind guide passage through the introduced air regulating portion, the water droplets are not easily directly sucked from the air inlet of the air cleaner because the air inlet of the air cleaner faces the side opposite to the introduced air regulating portion.

Effects of the invention

According to the aspect of the present invention, since the intake air adjusting portion is provided for taking in the outside air into the traveling wind guide passage separately from the traveling wind intake port when the negative pressure is generated on the intake portion side of the traveling wind guide passage, the outside air can be taken in quickly into the intake portion of the internal combustion engine through the traveling wind intake port and the intake air adjusting portion when the throttle valve is rapidly opened by the driver.

In the aspect of the present invention, the cross-sectional area of the traveling wind guide passage itself is not increased, but the outside air is taken in from the intake air adjustment portion only when the intake portion side of the traveling wind guide passage becomes negative pressure.

Therefore, when the present invention is adopted, it is possible to smoothly increase the output of the internal combustion engine in accordance with the opening operation of the throttle valve while suppressing an increase in size of the side cover.

Drawings

Fig. 1 is a side view of a straddle-type vehicle according to an embodiment of the present invention.

Fig. 2 is a side view of the straddle-type vehicle according to the embodiment of the present invention with a side cover removed.

Fig. 3 is a side view of a straddle-type vehicle according to an embodiment of the present invention, in which a portion of a side cover is removed and a portion is enlarged.

Fig. 4 is a side view showing a part of a straddle-type vehicle according to an embodiment of the present invention in an enlarged manner.

Fig. 5 is a sectional view of the straddle-type vehicle according to the embodiment of the present invention taken along line V-V of fig. 4.

Fig. 6 is a perspective view of a part of a side cover of a saddle-ride type vehicle according to an embodiment of the present invention.

Fig. 7 is a perspective view of a portion of a side cover of a saddle-ride type vehicle according to an embodiment of the present invention, viewed from another angle.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, directions such as front, rear, left, and right are the same as those of the vehicle unless otherwise specified. In the drawings, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle.

Fig. 1 is a view of the straddle-type vehicle according to the present embodiment as viewed from the right side.

The saddle-ride type vehicle of the present embodiment is an off-road type motorcycle in which the rear wheel Wr is driven by the engine 2 (internal combustion engine). Hereinafter, the saddle-ride type vehicle according to the present embodiment will be referred to as "motorcycle 1".

The frame F of the motorcycle 1 includes a head pipe 11 disposed at a front end portion, a main frame pipe 12 extending obliquely rearward and downward from the head pipe 11, a down pipe 13 extending downward from a position below a connection portion with the main frame pipe 12 on the head pipe 11, a pair of left and right center pipes 14L, 14R extending in a downward bent manner from a rear region of the main frame pipe 12, and a pair of left and right bottom pipes 15L, 15R connecting lower end portions of the left and right center pipes 14L, 14R and a lower end portion of the down pipe 13.

The frame F further includes a pair of left and right seat rails 16L, 16R extending from the rear portion of the main frame pipe 12 toward the vehicle body rear side, and a pair of left and right support pipes 17L, 17R connecting the center pipes 14L, 14R to the rear regions of the seat rails 16L, 16R.

Of the above-described members, members (for example, the center tube 14L) which are overlapped and hidden in front and rear of the paper surface are indicated by a reference numeral with a closed arc for convenience of illustration. In the following description, a member which is overlapped and hidden in front and rear of the paper is treated in the same manner.

A steering column, not shown, is pivotally supported on the head pipe 11 to be rotatable.

A top bridge 9 and a bottom bridge 10 are fixed to the upper and lower ends of the steering column. The top axle 9 and the bottom axle 10 support left and right front forks 22L, 22R as suspension members. The front wheel Wf is pivotally supported at the lower end of the front forks 22L and 22R so as to be rotatable. A steering handle 4 is mounted on the top of the top bridge 9. Further, a front fender 18 that covers an upper portion of the front wheel Wf is attached to the under axle 10.

A fuel tank 50 is mounted on the upper portion of the main frame pipe 12. A seat 51 for seating a passenger is attached to the seat rails 16L, 16R on the rear side of the fuel tank 50. Further, a rear fender 19 is attached to the rear portion of the seat rails 16L and 16R so as to cover the upper side of the rear wheel Wr from the rear portion side of the seat 51.

A power unit PU having the engine 2 and the transmission 3 as main elements is provided below the main frame pipe 12 in a region surrounded by the down pipe 13, the center pipes 14L and 14R, and the bottom pipes 15L and 15R. The engine 2 of the power unit PU rises upward toward the front so that the cylinder portion 2a extends along the down pipe 13. An intake duct 8 is connected to the rear side of the cylinder portion 2a and an exhaust duct 7 is connected to the front side of the cylinder portion 2 a.

A throttle valve section 6 is connected to the intake pipe 8, and a throttle valve, not shown, is built in the throttle valve section 6.

Further, the exhaust pipe 7 extends obliquely upward toward the rear of the vehicle body after being routed from the front of the cylinder portion 2a to the right side of the vehicle body. A muffler 5 is connected to the rear of the exhaust pipe 7.

A pivot 35 is attached to the lower edge of the left and right center tubes 14L and 14R. The pivot shaft 35 pivotally supports a distal end portion of the swing arm 34 so as to be swingable up and down. A rear wheel Wr is rotatably pivotally supported at a rear end portion of the swing arm 34. The axle of the rear wheel Wr is connected to an output shaft (not shown) of the power unit PU via a drive chain 38 so as to be capable of transmitting electric power.

The swing arm 34 is also supported by the vehicle body frame F via a cushion unit, not shown.

A resin front side cover 24 is detachably attached to the left and right side portions of the vehicle body, and the front side cover 24 covers a range from an upper side region of the down pipe 13 to a side region of the fuel tank 50 and a side portion lower region of the seat 51 near the front portion.

The front side cover 24 includes a front inner cover 24A disposed on the lower side and a front outer cover 24B disposed on the upper side in a state of being partially overlapped with the front inner cover 24A in the vertical direction.

The front outer cover 24B overlaps a part of the front inner cover 24A from the vehicle width direction outer side. The front inner cover 24A and the front outer cover 24B are fastened to the side of the fuel tank 50 and are attached to appropriate positions of the frame F via stays or the like, not shown.

A rear side cover 25 made of resin is detachably attached to a rear side position of the front side cover 24 on the left and right side portions of the vehicle body so as to partially overlap with the front side cover 24 in the front-rear direction. The rear side cover 25 includes a rear inner cover 25A disposed so as to partially overlap a rear edge portion of the front inner cover 24A, and a rear outer cover 25B covering a rear side lower edge of the rear inner cover 25A from the vehicle width direction outer side.

In the present embodiment, the front side cover 24 and the rear side cover 25 constitute a side cover of the motorcycle 1.

Fig. 2 is a right side view of the motorcycle 1 with the front cover 24B of the front side cover 24 and the rear side cover 25 removed. Fig. 3 is a view of a portion of the motorcycle 1 viewed from the right side with the rear cover 25B of the rear side cover 25 removed. Fig. 4 is an enlarged view of a portion of fig. 1 corresponding to fig. 3.

As shown in fig. 2, an air cleaner 27 for purifying outside air introduced into the engine 2 is disposed in a space portion surrounded by the center pipes 14L, 14R, the seat rails 16L, 16R, and the support pipes 17L, 17R on the rear side of the main frame pipe 12. An air cleaner 27 is connected to the throttle region 6 via an intake passage 26. The air cleaner 27 is attached to the frame F via a stay or the like. The rear side cover 25 is attached to the vehicle body so as to cover the left and right sides of the air cleaner 27.

Fig. 5 is a cross-sectional view of the motorcycle 1 taken along line V-V of fig. 4. As shown in fig. 5, the air cleaner 27 includes a front tank 28 on the clean chamber side and a rear tank 29 on the dirty chamber side, and a filter 30 is interposed between the front tank 28 and the rear tank 29. The intake passage 26 is connected to a front side tank portion 28. Further, an intake port 31 bent toward the left side of the vehicle body and having a tip end directed to the left side of the vehicle body is provided projecting from the upper surface of the rear box portion 29.

As shown in fig. 2, the front inner cover 24A includes a main body portion 24Aa that covers a range from an upper side region of the down pipe 13 to a side region near a lower portion of the fuel tank 50, and an extension piece 24Ab that protrudes from a lower end of a rear portion of the main body portion 24Aa in a substantially triangular shape toward a lower portion of the rear portion of the vehicle body. The extension piece 24Ab protrudes downward toward the rear side of the left and right center tubes 14L and 14R. As shown in fig. 3 and 4, the front edge portion of the rear inner cover 25A is superimposed on the vehicle width direction outer side of the rear half region of the extension piece 24 Ab.

Fig. 6 is a view of the rear inner cover 25A viewed obliquely from the rear obliquely downward on the outer side in the vehicle width direction, and fig. 7 is a view of the rear inner cover 25A viewed obliquely from the front obliquely upward on the inner side in the vehicle width direction.

As shown in fig. 6 and 7, the rear inner cover 25A includes a substantially triangular main body 25Aa inclined downward in a vehicle side view, and an extension piece 25Ab protruding downward from a lower end of a rear oblique side of the main body 25Aa, which is low in front and high in rear, toward the rear of the vehicle body.

In the state where the body portion 25Aa of the rear inner cover 25A is attached to the vehicle body, most of the outer surface thereof is exposed to the side of the vehicle body. On the other hand, the extension piece 25Ab is formed to be recessed in a stepped manner inward in the vehicle width direction with respect to the main body portion 25Aa in a large part, and the outer surface side of the extension piece 25Ab is covered with the rear cover 25B.

Strictly speaking, the downward substantially triangular upper surface side of the main body portion 25Aa is recessed in a substantially V-shape in a vehicle body side view, and the main body portion 25Aa is along the lower surface of the side portion of the seat 51 in a state of being attached to the vehicle body. The upper front end side of the main body portion 25Aa is inclined obliquely downward toward the front portion, and this inclined portion abuts against the rear end portion of the front cover 24B. The upper rear end side of the body portion 25Aa is extended long toward the vehicle body rear side while the vertical width is reduced in a tapered shape.

As shown in fig. 5, the main body portion 25Aa of the rear inner cover 25A is attached to the vehicle body in a state of partially overlapping the extension piece 24Ab in the vehicle-body side view so that the front edge portion thereof covers the vehicle-widthwise outer side of the rear edge portion of the extension piece 24Ab of the front inner cover 24A. In this state, a predetermined separation width is secured between the front end portion of the main body portion 25Aa and the outer surface of the extension piece 24Ab with respect to the front side cover 24 and the rear side cover 25 on the right side of the vehicle body. The divided portion becomes the traveling wind intake port 32 in order to take in the traveling wind from the front of the vehicle.

The lower end of the main body 25Aa of the rear inner cover 25A overlaps the lower end of the extension piece 24Ab of the front inner cover 24A, and is fastened to the stay 20 (see fig. 2) protruding from the air cleaner 27 in this state.

Here, the rear cover 25B is formed into a substantially rhombus shape in a vehicle side view, as shown in fig. 1 and 4. The front inclined side 25Bf of the rear outer cover 25B abuts on the rear edge of the steep inclined portion on the rear side of the main body portion 25Aa of the rear inner cover 25A, and the upper side 25Bu of the rear outer cover 25B abuts on the lower edge of the gentle inclined portion on the rear side of the main body portion 25Aa of the rear inner cover 25A. The rear outer cover 25B is engaged in a concave-convex manner with an extension piece 25Ab of the rear inner cover 25A at an arbitrary position in the front region, and the rear region is fastened to a muffler cover 33 (see fig. 1) attached to the vehicle body by a bolt (not shown).

As shown in fig. 3, in a side view of the vehicle body, the front end portion 36 of the extension piece 25Ab of the rear inner cover 25A is inclined toward the rear lower side of the vehicle body, and a substantially triangular opening is formed between the front end portion 36 and the main body portion 25 Aa. The opening portion is closed by the rear cover 25B.

As shown in fig. 5, an inner surface (a surface on the inner side in the vehicle width direction) of the rear inner cover 25A on the right side of the vehicle body and an inner surface (a surface on the inner side in the vehicle width direction) of the rear outer cover 25B constitute a traveling wind guide passage 39 for guiding the traveling wind taken in from the traveling wind intake port 32 to the intake portion of the engine 2. A part of the traveling wind introduced into the traveling wind guide passage 39 flows into the intake port 31 of the air cleaner 27.

A bulging portion 40 bulging outward in the vehicle width direction is formed in a rear region of the traveling wind guide passage 39 in the extension piece 25Ab of the rear inner cover 25A on the right side of the vehicle body. As shown in fig. 6 and 7, the bulging portion 40 has a front inclined portion 40F inclined outward in the vehicle width direction from the front end portion 36 of the extension piece 25Ab toward the vehicle body rear side, and a rear inclined portion 40R (inclined portion) inclined inward in the vehicle width direction from the top of the front inclined portion 40F toward the vehicle body rear side. The bulging portion 40 is disposed on the vehicle width direction outer side of the traveling wind guide passage 39, and constitutes a part of a guide wall along which the traveling wind guided to the air cleaner 27 flows.

As shown in fig. 5, the bulging portion 40 of the rear inner cover 25A on the right side of the vehicle body is disposed at the right side portion of the vehicle body of the installation portion of the air intake port 31 of the air cleaner 27. As shown in fig. 5, a rear shielding wall 37R for covering the front of the rear wheel Wr is attached to the left and right support pipes 17L and 17R, and a space between the rear shielding wall 37R and the left side of the air cleaner 27 is closed by a side shielding wall 37S. The air inlet 31 of the air cleaner 27 is disposed toward the left side of the vehicle body in a space S surrounded by the rear shielding wall 37R, the side shielding wall 37S, and the air cleaner 27. The bulging portion 40 of the rear inner cover 25A on the right side of the vehicle body connects the rear region of the traveling wind guide passage 39 to the space S.

Here, the rear inclined portion 40R of the bulging portion 40 of the rear inner cover 25A is provided with a mesh structure portion 41 in which a plurality of through holes 41a are formed. As shown in fig. 5, the through-holes 41a of the mesh structure portion 41 are formed so as to be directed in the vehicle width direction in a state of being attached to the vehicle body. The mesh structure portion 41 constitutes an introduced air adjusting portion that takes in outside air from the vehicle exterior side separately from the traveling wind intake port 32 on the front end side of the traveling wind guide passage 39 when negative pressure is applied to the intake portion side (the air cleaner 27 side) of the traveling wind guide passage 39.

The mesh structure portion 41 forming the introduced air regulating portion is disposed at a position closer to the intake port 31 of the air cleaner 27 (intake portion of the internal combustion engine) than the traveling wind intake port 32 on the front side.

Further, the front inclined portion 40F of the bulging portion 40 of the rear inner cover 25A is formed with a plurality of (two) concave portions 42, and the vehicle width direction inner side surface of the concave portion 42 facing the traveling wind guide passage 39 is concavely recessed and the vehicle width direction outer side surface is convexly bulged. The rear wall 42r of the concave portion 42 on the inner surface side facing the traveling wind guide passage 39 is inclined inward in the vehicle width direction toward the vehicle body rear side. Therefore, when the traveling wind flowing in from the front along the traveling wind guide passage 39 hits the rear wall 42r of the concave portion 42, the traveling direction thereof is changed to be inward in the vehicle width direction. In the present embodiment, since the concave portion 42 is disposed at a position forward of the mesh structure portion 41, when the traveling wind flowing in from the traveling wind inlet 32 hits the rear wall 42r of the concave portion 42 and flows while changing its orientation inward in the vehicle width direction, the traveling wind is not easily discharged to the outside through the mesh structure portion 41.

The rear outer cover 25B locked to the rear inner cover 25A on the right side of the vehicle body overlaps to cover the outer side of the bulging portion 40 of the rear inner cover 25A. Therefore, the traveling wind flowing in from the traveling wind intake port 32 on the vehicle front side is less likely to be discharged rearward from the outer portion of the bulging portion 40 of the rear inner cover 25A. However, the vehicle rear side of the rear cover 25B is open to the vehicle rear side. Therefore, the mesh structure 41 provided in the rear inclined portion 40R of the bulging portion 40 is electrically connected to the outside through the opening on the rear side of the rear cover 25B.

Next, the flow of traveling wind in the motorcycle 1 according to the present embodiment will be described.

During normal running of the vehicle in which the throttle operation is relatively gentle, as shown by a solid arrow in fig. 5, running wind flows into a running wind intake 32 formed between the front side cover 24 and the rear side cover 25 on the right side of the vehicle body, and the running wind flows into the air cleaner 27 through a running wind guide passage 39 provided inside the rear side cover 25. At this time, the traveling wind is redirected inward in the vehicle width direction by the bulging portion 40 in the rear region of the traveling wind guide passage 39, and is introduced into the space S where the air inlet 31 of the air cleaner 27 faces. Then, the traveling wind introduced into the intake port 31 is purified by the air cleaner 27 and flows into the intake portion of the engine 2.

On the other hand, when the throttle valve is abruptly opened by the driver, an intake shortage occurs only by the traveling wind flowing in from the traveling wind intake port 32, and the intake port 31 portion of the air cleaner 27 becomes a negative pressure. As a result, a negative pressure acts on the mesh structure 41 of the rear inclined portion 40R provided in the bulging portion 40 from the inside direction of the bulging portion 40. As a result, as shown by the broken line arrows in fig. 5, the outside air outside the swelling portion 40 enters the inside of the swelling portion 40 through the through holes 41a of the mesh structure portion 41, and this outside air is sucked into the intake port of the air cleaner 27. As a result, sufficient outside air flows into the intake portion of the engine 2 from the traveling wind intake port 32 and the mesh structure portion 41 quickly.

As described above, the motorcycle 1 of the present embodiment is provided with the mesh structure portion 41 (introduced air adjusting portion) and the mesh structure portion 41 separately takes in the outside air to the traveling wind intake port 32 when the negative pressure is generated on the intake portion side in the traveling wind guide passage 39, so that the outside air can be quickly taken in to the engine 2 through the traveling wind intake port 32 and the mesh structure portion 41 when the throttle is rapidly opened by the driver. Further, the motorcycle 1 of the present embodiment is configured not to simply enlarge the cross-sectional area of the traveling wind guide path 39, but to take in the outside air from the mesh structure 41 only when the negative pressure is generated on the air intake side of the traveling wind guide path 39, so that it is possible to avoid the problem that the rear portion side cover 25 becomes excessively large.

Therefore, in the case of the motorcycle 1 according to the present embodiment, the output of the engine 2 can be smoothly increased in accordance with the opening operation of the throttle valve while suppressing an increase in the size of the rear side cover 25.

In the motorcycle 1 of the present embodiment, the mesh structure portion 41 as the introduced air adjusting portion is disposed at a position closer to the air inlet 31 of the air cleaner 27 than the traveling wind intake port 32. Therefore, when the throttle valve is rapidly opened by the driver and the vicinity of the intake port 31 of the air cleaner 27 becomes negative pressure, the external air can be quickly supplied by the mesh structure 41 close to the intake port 31. Therefore, when this structure is adopted, the output of the engine 2 can be increased more quickly with respect to the opening operation of the throttle valve.

In the motorcycle 1 of the present embodiment, a bulging portion 40, which is a guide wall disposed on the vehicle width direction outer side and guiding the traveling wind in the direction of the air inlet 31 of the air cleaner 27, is provided in a part of the traveling wind guide passage 39, and a mesh structure portion 41, which is an introduced air adjusting portion, is formed in the bulging portion 40. Therefore, during normal running of the vehicle, the running wind is guided by the inner surface of the bulging portion 40 and easily flows in the direction of the air intake port 31 of the air cleaner 27, and leakage of the running wind to the outside of the bulging portion 40 through the mesh structure portion 41 can be suppressed. On the other hand, when the air intake port 31 of the air cleaner 27 becomes negative pressure due to a sudden throttle opening operation by the driver, the outside air can be supplied from the outside of the bulging portion 40 through the mesh structure portion 41. Therefore, when this structure is adopted, the introduced air adjusting portion can be formed with a simple structure.

In particular, in the case of the motorcycle 1 of the present embodiment, the concave portion 42 is provided in the front inclined portion 40F of the bulging portion 40, and the direction of the traveling wind can be changed inward in the vehicle width direction on the front side of the mesh structure portion 41 by the rear wall 42r of the concave portion 42. Therefore, the leakage of the traveling wind to the outside of the bulging portion 40 through the mesh structure portion 41 can be more favorably suppressed.

In the motorcycle 1 of the present embodiment, the expanded portion 40 formed in the rear region of the traveling wind guide passage 39 so as to expand outward in the vehicle width direction is provided with the mesh structure portion 41, and therefore, when the traveling wind intake port 32 on the front side is viewed from the front, the mesh structure portion 41 is not visually recognized through the traveling wind intake port 32. As a result, the design of the appearance of the motorcycle 1 is improved. In the case of the present embodiment, since the mesh structure portion 41 is provided in the bulging portion 40 bulging outward in the vehicle width direction, the traveling wind traveling straight toward the rear region from the traveling wind intake port 32 does not easily directly contact the mesh structure portion 41, and leakage of the traveling wind taken in from the traveling wind intake port 32 through the mesh structure portion 41 can be further suppressed.

In the motorcycle 1 of the present embodiment, the mesh structure portion 41 is provided in the rear inclined portion 40R of the bulging portion 40 as the guide wall. Therefore, during normal running of the vehicle, the running wind passing through the running wind guide passage 39 smoothly flows in the direction of the air cleaner 27 along the inner surface of the rear inclined portion 40R, and leakage of the running wind to the outside of the bulging portion 40 through the mesh structure portion 41 can be effectively suppressed. Even if water flows into the rear opening of the rear cover 25B during vehicle washing or the like, the water flow that hits the outer surface of the rear inclined portion 40R flows outward in the vehicle width direction along the outer surface of the rear inclined portion 40R. Therefore, the water flow is less likely to enter the air cleaner 27 in the direction of the intake port 31 through the mesh structure 41 during vehicle washing or the like.

In particular, in the case of the present embodiment, since the through holes 41a formed in the mesh structure portion 41 of the rear inclined portion 40R are formed along the vehicle width direction, even if the water flow directly hits the mesh structure portion 41 from the rear side of the vehicle body, the water flow can be favorably suppressed from entering in the inner direction of the bulging portion 40 through the through holes 41 a.

In the motorcycle 1 of the present embodiment, the mesh structure portion 41 as the air adjustment portion is provided on one side (right side) in the vehicle width direction, and the air inlet 31 of the air cleaner 27 is provided toward the other side (left side) in the vehicle width direction. Therefore, even if water droplets enter the inside of the swelling portion 40 through the mesh structure portion 41 during washing, the air inlet 31 of the air cleaner 27 faces the side opposite to the side where the mesh structure portion 41 is disposed, and water droplets are not easily directly sucked from the air inlet 31 of the air cleaner 27. Therefore, it is possible to more reliably avoid a problem caused by the entry of water droplets into the intake portion of the engine 2.

The present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the traveling wind intake port 32, the traveling wind guide passage 39, the bulging portion 40, the mesh structure portion 41, and the like are provided in the side cover disposed on the right side of the vehicle body, but they may be provided in the side cover disposed on the left side of the vehicle body. Further, they may be provided on both right and left side covers of the vehicle body.

The straddle-type vehicle according to the present invention is not limited to a motorcycle (including a bicycle with a prime mover and a scooter-type vehicle), but may include a three-wheeled (including a vehicle with front and rear wheels in addition to the front and rear wheels) or a four-wheeled scooter-type vehicle.

Description of reference numerals:

1 … Motor bicycle (straddle type vehicle)

2 … Engine (internal combustion engine)

24 … front side cover (side cover)

25 … rear side cover (side cover)

27 … air cleaner

31 … air inlet

32 … running wind intake

39 … running wind guide path

40 … bulge

Rear inclined part (inclined part) of 40R …

41 … mesh structure part (introduced air adjusting part).

Claims (5)

1. A saddle-ride type vehicle in which, in a saddle-ride type vehicle,

the straddle-type vehicle is provided with:

an internal combustion engine (2); and

side covers (24, 25) that cover the sides of the vehicle,

the side covers (24, 25) are provided with:

a traveling wind intake port (32) for taking in traveling wind from the front of the vehicle;

a traveling wind guide passage (39) that guides traveling wind taken in from the traveling wind intake port (32) to an intake portion of the internal combustion engine (2); and

an intake air adjusting unit (41) that takes in outside air into the traveling wind guide passage (39) separately from the traveling wind intake port (32) when the intake portion side in the traveling wind guide passage (39) has a negative pressure,

a part of the traveling wind guide passage (39) is formed as a concave portion (42) at a position in front of the vehicle body where the air adjusting portion (41) is introduced, the concave portion (42) having a concave inner surface in the vehicle width direction and a convex outer surface in the vehicle width direction,

a rear wall (42r) on the inner surface side of the concave portion (42) is inclined inward in the vehicle width direction toward the vehicle body rear side,

the introduced air adjusting unit (41) is provided on one side of the vehicle, and an intake port (31) of an air cleaner (27) of the vehicle, which is provided on the intake side of the internal combustion engine (2), is provided toward the other side of the vehicle.

2. The straddle-type vehicle according to claim 1, wherein,

the intake air adjustment unit (41) is disposed at a position closer to an intake port (31) of an air cleaner (27) of the vehicle, which is provided on an intake side of the internal combustion engine (2), than the traveling wind intake port (32).

3. The straddle-type vehicle according to claim 1 or 2, wherein,

the traveling wind guide passage (39) has a guide wall (40), the guide wall (40) being disposed on the outer side in the vehicle width direction and causing the traveling wind to flow along the inner surface,

a mesh structure part (41) is provided at least in a part of the guide wall (40),

the introduced air adjusting part is composed of the mesh structure part (41).

4. The straddle-type vehicle according to claim 3, wherein,

the mesh structure part (41) is provided in a rear region of the traveling wind guide passage (39) so as to bulge outward in the vehicle width direction.

5. The straddle-type vehicle according to claim 4, wherein,

the mesh structure portion (41) is provided on an inclined portion (40R) of the guide wall (40), and the inclined portion (40R) is inclined inward in the vehicle width direction with respect to an upstream portion of the traveling wind guide passage (39) extending from the traveling wind intake port (32) toward the vehicle rear side.

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