CN110461695A - straddle vehicle - Google Patents

Abstract

The straddle type vehicle has: an internal combustion engine (2); and side covers (24, 25) covering the sides of the vehicle. a traveling wind is taken in; a traveling wind guide passage (39) guides the traveling wind taken in from the traveling wind inlet (32) to an air intake part of the internal combustion engine (2); and an air regulating part (41) is introduced When the air intake portion side in the travel wind guide passage (39) becomes a negative pressure, the travel wind guide passage (39) is additionally fed to the travel wind guide passage (39) with respect to the travel wind intake port (32). into the outside air.

Description

straddle vehicle

technical field

The present invention relates to a straddle type vehicle provided with side covers that cover side portions of a vehicle body.

This application claims priority based on Japanese Patent Application No. 2017-061872 for which it applied on March 27, 2017, and uses the content here.

Background technique

As straddle-type vehicles such as motorcycles, there are known vehicles provided with side covers that cover side portions of the vehicle body in order to reduce running resistance. In a straddle type vehicle equipped with a side cover, the side of the internal combustion engine is covered by the side cover, and therefore, the internal combustion engine that guides running air inside the side cover is required for cooling and air intake.

As a countermeasure against this, a straddle-type vehicle is proposed in which an intake passage for introducing running air from the front of the vehicle body to the direction of the internal combustion engine is provided on the inside of the side cover (for example, refer to Patent Document 1), and a running air guide passage is provided on the side cover itself. straddle-type vehicle (for example, refer to Patent Document 2) and the like.

prior art literature

patent documents

Patent Document 1: Japanese Patent No. 5944457

Patent Document 2: Japanese Patent Laid-Open No. 61-125921

Contents of the invention

The problem to be solved by the invention

However, in the above-mentioned conventional straddle-type vehicles, the running wind is introduced into the internal combustion engine only from the running wind inlet provided at the front portion of the side cover. Therefore, for example, when the driver suddenly opens the throttle valve, etc., There is concern that the flow rate of the introduced air from the running air inlet is insufficient. In addition, if the intake air is insufficient during the opening operation of the throttle valve, a smooth increase in the output of the internal combustion engine is hindered.

In addition, as a countermeasure, it is conceivable to enlarge the cross-sectional area of the intake passage and the travel wind guide passage, but when simply enlarging the cross-sectional area of the intake passage and the travel wind guide passage, the outer side of the intake passage and the travel wind guide passage must be expanded. The main body of the covered side cover is enlarged, which may affect the driver's ride quality and appearance.

The aspect of the present invention provides a straddle type vehicle capable of suppressing an increase in the size of a side cover and achieving a smooth increase in the output of an internal combustion engine in response to an opening operation of a throttle valve.

Solution to the problem

The saddled vehicle of the present invention employs the following structures.

(1) A straddle-type vehicle according to one aspect of the present invention includes: an internal combustion engine; and a side cover that covers the sides of the vehicle. a guide passage that guides the traveling wind taken in from the traveling wind inlet to the intake portion of the internal combustion engine; When the pressure is negative, outside air is taken into the traveling wind guide passage separately from the traveling wind inlet.

With the configuration of (1) above, during normal running in which the throttle valve is operated gently, traveling air is taken in into the air intake portion of the internal combustion engine through the traveling air intake port of the side cover. Also, when the driver suddenly opens the throttle and the air intake portion side of the traveling wind guide passage becomes negative pressure, outside air is also taken in from the intake air adjustment portion to the intake portion of the internal combustion engine. Therefore, when this structure is adopted, without enlarging the size of the side cover, when the intake air is insufficient, it is possible to take in sufficient external air into the intake portion of the internal combustion engine.

(2) In the aspect of (1) above, the intake air adjustment unit may be disposed closer to the air intake of the vehicle provided on the intake side of the internal combustion engine than the travel air inlet. The location of the air intake of the filter.

With the structure of (2) above, when the air intake port of the air cleaner becomes negative pressure due to a sudden throttle opening operation, etc., the intake air adjustment unit provided at a position close to the air intake port performs rapid adjustment. Supply of external gas. Therefore, when this structure is adopted, it is possible to obtain a more rapid increase in the output of the internal combustion engine corresponding to the opening operation of the throttle valve.

(3) In addition to the above (1) or (2), the traveling wind guide passage may have a guide wall disposed on the outer side in the vehicle width direction and guide the traveling wind along the The inner surface of the guide wall flows, and at least a part of the guide wall is provided with a mesh structure portion, and the introduced air adjustment portion is constituted by the mesh structure portion.

With the configuration of (3) above, during normal running of the vehicle, traveling air flows toward the intake portion of the internal combustion engine along the inner surface of the guide wall of the traveling air guide passage. At this time, the flow of the traveling wind along the inner surface of the guide wall suppresses the leakage of the traveling wind passing through the mesh structure to the outside of the guide wall. On the other hand, when the intake portion side of the internal combustion engine becomes negative pressure due to sudden throttle opening operation, external 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 introduction air adjustment unit can be formed with a simple structure.

(4) In the aspect of (3) 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.

According to the configuration of (4) above, when the traveling wind inlet is peeked from the front, it is difficult to see the mesh structure part from the traveling wind inlet. Thereby, the exterior design property of a vehicle improves. In addition, since the mesh structure portion is provided on the bulging portion that bulges outward in the vehicle width direction, it is possible to further suppress leakage of the running wind taken in from the running wind inlet through the mesh structure portion.

(5) In the aspect of (4) above, the mesh structure portion may be provided on an inclined portion of the guide wall, and the inclined portion is directed toward the rear side of the vehicle from the traveling air intake port. An upstream portion of the extended traveling wind guide passage is inclined inward in the vehicle width direction.

According to the structure of (5) above, since the mesh structure portion is provided on the inclined portion of the guide wall inclined inwardly in the vehicle width direction, the traveling wind is not discharged from the mesh structure portion of the guide wall to the outside during normal running of the vehicle, but flows along the The inner surface of the inclined portion smoothly flows toward the intake portion side of the internal combustion engine. Also, when the water flow hits the outer surface of the inclined portion of the guide wall from the rear of the vehicle during car washing, the water flow flows outward in the vehicle width direction along the outer surface of the inclined portion of the guide wall. Therefore, it is difficult for the flow of water to pass through the mesh structure and enter toward the air intake portion inside the vehicle during car washing.

(6) On the basis of any one of the above (1) to (5), the introduction air adjustment unit may be provided on one side of the vehicle and provided on the intake side of the internal combustion engine. The air intake 31 of the air filter 27 of the vehicle is disposed toward the other side of the vehicle.

With the structure of (6) above, even if water droplets enter the travel wind guide passage through the introduction air adjustment part, since the air intake port of the air filter faces the side opposite to the introduction air adjustment part, the water droplets are not easy to flow from the air filter. The air inlet is directly inhaled.

Invention effect

According to the aspect of the present invention, when the air intake portion side of the travel wind guide passage becomes a negative pressure, the introduction air adjustment part that takes in the outside air into the travel wind guide passage separately from the travel wind intake port is provided. When the driver opens the throttle quickly, outside air can be quickly taken in into the air intake of the internal combustion engine through the traveling air intake port and the intake air adjustment unit.

In addition, in the case of the aspect of the present invention, instead of enlarging the cross-sectional area of the traveling wind guide passage itself, the outside air is also taken in from the intake air adjustment part only when the air intake part side of the traveling wind guide passage becomes negative pressure. structure, it is also possible to avoid an increase in the size of the side cover.

Therefore, when the present invention is adopted, it is possible to achieve a smooth increase in the output of the internal combustion engine corresponding to the opening operation of the throttle valve while suppressing the increase in size of the side cover.

Description of drawings

FIG. 1 is a side view of a saddled vehicle according to one embodiment of the present invention.

Fig. 2 is a side view of the saddled vehicle according to the embodiment of the present invention, with side covers removed.

Fig. 3 is a side view of the saddled vehicle according to the embodiment of the present invention, in which a part of the side cover is removed and a part is enlarged.

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

5 is a cross-sectional view of the saddled vehicle according to the embodiment of the present invention along the line V-V in FIG. 4 .

Fig. 6 is a perspective view of a part of a side cover of the saddled vehicle according to the embodiment of the present invention.

7 is a perspective view of a part of the side cover of the saddled vehicle according to the embodiment of the present invention viewed from another angle.

Detailed ways

Hereinafter, an embodiment of the present invention will be described based on the drawings. It should be noted that directions such as front, rear, left, and right in the following description are the same as directions for the vehicle unless otherwise specified. In the figure, 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 a saddled vehicle according to this embodiment viewed from the right side.

The saddled vehicle of the present embodiment is an off-road type motorcycle in which an engine 2 (internal combustion engine) drives a rear wheel Wr. Hereinafter, the straddle-type vehicle of this embodiment is called "the motorcycle 1".

The frame F of the motorcycle 1 includes a head pipe 11 disposed at the front end, a main frame pipe 12 extending obliquely downward rearward from the head pipe 11 , and a position below a connecting portion connected to the main frame pipe 12 on the head pipe 11 . The down tube 13 extending downward, the pair of left and right central tubes 14L, 14R bent downward from the rear area of the main frame tube 12 , and the lower ends of the left and right central tubes 14L, 14R connected to the lower end of the down tube 13 A pair of left and right bottom pipes 15L, 15R connected at the bottom.

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

In addition, among the above-mentioned members, the members (for example, the center pipe 14L) overlapped and hidden in front of the paper are given reference numerals in parentheses for convenience of illustration. In the following description, members overlapping and hidden in the front and back of the paper are treated in the same way.

A steering column (not shown) is pivotally supported on the head pipe 11 in a rotatable manner.

A top bridge 9 and a bottom bridge 10 are fixed to upper and lower ends of the steering column. Left and right front forks 22L, 22R serving as suspension members are supported on the top bridge 9 and the bottom bridge 10 . A front wheel Wf is rotatably pivotally supported on the lower ends of the front forks 22L, 22R. A steering handlebar 4 is installed on the top of the top bridge 9 . In addition, a front fender 18 covering the upper side of the front wheel Wf is attached to the bottom axle 10 .

A fuel tank 50 is attached to the upper portion of the main frame pipe 12 . A seat 51 on which a passenger sits is attached to the seat rails 16L, 16R on the rear side of the fuel tank 50 . Moreover, the rear fender 19 which covers the upper side of the rear wheel Wr from the rear part side of the seat 51 is attached to the rear part of seat rail 16L, 16R.

Below the main frame pipe 12, a power unit PU having the engine 2 and the transmission 3 as main elements is provided in a region surrounded by the down pipe 13, the center pipes 14L, 14R, and the bottom pipes 15L, 15R. The engine 2 of the power unit PU stands up toward the upper part side so that the cylinder part 2a follows the downpipe 13. As shown in FIG. An intake pipe 8 is connected to the vehicle body rear side of the cylinder portion 2 a, and an exhaust pipe 7 is connected to the vehicle body front side of the cylinder portion 2 a.

A throttle section 6 is connected to the intake pipe 8 , and the throttle section 6 has a throttle valve (not shown) built therein.

In addition, the exhaust pipe 7 extends obliquely upward to 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 .

Pivot shafts 35 are attached to lower edge portions of the left and right central pipes 14L, 14R. The front end portion of the swing arm 34 is pivotally supported by the pivot shaft 35 so as to be able to swing up and down. A rear wheel Wr is rotatably pivotally supported on a rear end portion of the swing arm 34 . The axle shaft of the rear wheel Wr is electrically transmissibly connected to an output shaft (not shown) of the power unit PU via a drive chain 38 .

It should be noted that the swing arm 34 is also supported by the body frame F via a buffer unit not shown.

Front side covers 24 made of resin are detachably attached to the left and right side parts of the vehicle body, and the front side covers 24 cover the sides from the upper side area of the down pipe 13 to the side of the fuel tank 50 and the seat. 51 the range of the side lower area near the front.

The front side cover 24 includes a front inner cover 24A arranged on the lower side, and a front outer cover 24B arranged on the upper side while partially overlapping 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 outside in the vehicle width direction. The front inner cover 24A and the front outer cover 24B are fastened to the side of the fuel tank 50 and attached to appropriate positions of the body frame F via unillustrated stays or the like.

In addition, a resin rear side cover 25 is detachably attached to the rear side of the front side cover 24 on the left and right sides of the vehicle body so as to partially overlap the front side cover 24 in the front-rear direction. . The rear side cover 25 includes a rear inner cover 25A arranged to partially overlap the rear edge of the front inner cover 24A, and a rear outer cover 25B covering the rear side lower edge of the rear inner cover 25A from outside in the vehicle width direction.

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

FIG. 2 is a view of the motorcycle 1 from the right side without the front outer cover 24B of the front side cover 24 and the rear side cover 25 . FIG. 3 is a view of a part of the motorcycle 1 viewed from the right side with the rear outer cover 25B of the rear side cover 25 removed. In addition, FIG. 4 is an enlarged view showing a portion corresponding to FIG. 3 in FIG. 1 .

As shown in FIG. 2 , on the rear side of the main frame pipe 12 , in the space surrounded by the central pipes 14L, 14R, seat rails 16L, 16R, and support pipes 17L, 17R, a filter for purifying the air introduced into the engine 2 is arranged. Air filter 27 for outside air. The air filter 27 is connected to the throttle body 6 via the intake passage 26 . The air cleaner 27 is attached to the body 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 diagram showing a cross section of the motorcycle 1 along line V-V in FIG. 4 . As also shown in FIG. 5 , the air cleaner 27 has a front case portion 28 on the clean room side and a rear case portion 29 on the dirty room side, and is sandwiched between the front case portion 28 and the rear case portion 29 . There are filter 30. The intake passage 26 is connected to a front side box portion 28 . In addition, an air intake port 31 is protrudingly provided on the upper surface of the rear side box portion 29 and is bent toward the left side of the vehicle body so that the front end thereof points toward the left side of the vehicle body.

As shown in FIG. 2 , the front inner cover 24A has a main body portion 24Aa that covers the range from the upper side area of the downcomer 13 to the lower side area of the fuel tank 50 , and the rear portion of the main body portion 24Aa. An extension piece 24Ab whose lower end protrudes in a substantially triangular shape toward the lower rear portion of the vehicle body. The extension piece 24Ab protrudes downward toward the rear side of the left and right central pipes 14L, 14R. On the outside in the vehicle width direction of the rear half region of the extension piece 24Ab, as shown in FIGS. 3 and 4 , the front edge portion of the rear inner cover 25A is overlapped from the outside in the vehicle width direction.

6 is a view of the rear inner cover 25A viewed obliquely below the rear portion on the outer side in the vehicle width direction, and FIG. 7 is a view obtained by viewing the rear inner cover 25A from obliquely above the front portion on the inner side in the vehicle width direction.

As also shown in FIGS. 6 and 7 , the rear inner cover 25A has a substantially triangular-shaped main body portion 25Aa that faces downward when viewed from the side of the vehicle, and a lower end of the rear hypotenuse of the main body portion 25Aa that is low in the front and high in the rear. An extension piece 25Ab protruding from the lower part of the rear part of the vehicle body.

When the main body portion 25Aa of the rear inner cover 25A is attached to the vehicle body, most of its outer surface is exposed to the side of the vehicle body. On the other hand, most of the extension piece 25Ab is recessed inward in the vehicle width direction with respect to the main body portion 25Aa, and the outer surface side of the extension piece 25Ab is covered by the rear cover 25B.

Strictly speaking, the downward substantially triangular-shaped upper surface side of the main body portion 25Aa is formed in a substantially V-shaped depression in a side view of the vehicle body. lower surface of the side. The upper front end side of the main body portion 25Aa is inclined obliquely downward toward the front, and this inclined portion is in contact with the rear end portion of the front cover 24B. In addition, the upper rear end side of the main body portion 25Aa extends long toward the vehicle body rear side while shortening the vertical width in a tapered shape.

As shown in FIG. 5 , the main body portion 25Aa of the rear inner cover 25A is partially aligned with the extension piece 24Ab in a vehicle body side view so that the front edge thereof covers the rear edge portion of the extension piece 24Ab of the front inner cover 24A in the vehicle width direction outer side. Attached to the vehicle body in an overlapping state. For the front side cover 24 and the rear side cover 25 on the right side of the vehicle body, in this state, a predetermined separation width is ensured between the front end portion of the main body portion 25Aa and the outer surface of the extension piece 24Ab. This divided portion serves as a traveling wind inlet 32 in order to take in traveling wind from the front of the vehicle.

It should be noted that the lower end of the main body portion 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 protruding from the air cleaner 27 in this state (see figure 2).

Here, as shown in FIGS. 1 and 4 , the rear cover 25B is formed in a substantially rhombic shape in a vehicle side view. The front inclined side 25Bf of the rear outer cover 25B abuts against the rear edge of the steeply 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 against the rear of the main body portion 25Aa of the rear inner cover 25A. The lower edge of the gently sloping portion on the side. The rear outer cover 25B is concave-convexly engaged with the extension piece 25Ab of the rear inner cover 25A at any part of the front area, and the rear area is fastened to the muffler cover 33 attached to the vehicle body with bolts not shown (see FIG. 1 ). .

As shown in FIG. 3 , in a side view of the vehicle body, the front end 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 36 and the main body 25Aa. This opening portion is closed by the rear cover 25B.

As shown in FIG. 5 , the inner surface (the inner surface in the vehicle width direction) of the rear inner cover 25A on the right side of the vehicle body and the inner surface (the inner surface in the vehicle width direction) of the rear outer cover 25B constitute the air intake port 32 for the intake air. The traveling air guide passage 39 guides the incoming traveling air to the air 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 .

In the extension piece 25Ab of the rear inner cover 25A on the right side of the vehicle body, a bulging portion 40 that bulges outward in the vehicle width direction is formed in a rear region of the travel wind guide passage 39 . As shown in FIGS. 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 rear side of the vehicle body, and a front inclined portion 40F extending from the top of the front inclined portion 40F toward the rear side of the vehicle body. And the rear inclined portion 40R (inclined portion) inclined inwardly in the vehicle width direction. The bulging portion 40 is arranged on the vehicle width direction outer side of the traveling wind guide passage 39 and constitutes a part of the guide wall through which the traveling wind guided to the air cleaner 27 flows along the inner surface.

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 on the right side portion of the vehicle body where the intake port 31 of the air cleaner 27 is installed. In addition, as shown in FIG. 5 , a rear shielding wall 37R covering the front of the rear wheel Wr is attached to the left and right support pipes 17L, 17R, and the rear shielding wall 37R is separated from the left side of the air cleaner 27 . The space is closed by the side shielding wall 37S. The intake port 31 of the air cleaner 27 is arranged toward the left side of the vehicle body in the space S surrounded by the rear shielding wall 37R, the side shielding wall 37S, and the air cleaner 27 . The bulged 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 portion S. As shown in FIG.

Here, the mesh structure part 41 in which the several through-hole 41a was formed is provided in the rear inclined part 40R in the bulging part 40 of the rear inner cover 25A. As shown in FIG. 5 , the through-holes 41 a of the mesh structure portion 41 are formed so as to be oriented in a direction along the vehicle width direction in a state of being attached to the vehicle body. The mesh structure portion 41 is configured so that when the air intake side (air cleaner 27 side) of the travel wind guide passage 39 becomes negative pressure, the travel wind intake port 32 on the front end side of the travel wind guide passage 39 is separately removed from the vehicle. The introduction air adjustment part that takes in the outside air from the outside.

The mesh structure portion 41 forming the intake air adjusting portion is arranged closer to the intake port 31 of the air cleaner 27 (the intake portion of the internal combustion engine) than the traveling wind intake port 32 on the front side.

In addition, in the front inclined portion 40F of the bulging portion 40 of the rear inner cover 25A, a plurality (two) of concave-shaped portions 42 are formed on the inner side in the vehicle width direction facing the travel wind guide passage 39 . The surface of the car is concave, and the outer surface in the width direction of the vehicle is convex. The rear wall 42 r on the inner surface side of these concave portions 42 facing the travel wind guide passage 39 is inclined toward the vehicle body rear side and inwardly in the vehicle width direction. Therefore, when the traveling wind flowing in from the front along the traveling wind guide passage 39 hits the rear wall 42 r of the concave portion 42 , its traveling direction is changed to go inward in the vehicle width direction. In the present embodiment, since the concave portion 42 is arranged in front 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, its direction changes to the inside in the vehicle width direction. When the ground flows, the traveling wind is less likely to pass through the mesh structure portion 41 and be discharged to the outside.

The rear outer cover 25B locked to the rear inner cover 25A on the right side of the vehicle body overlaps so as to cover the outside 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 front side of the vehicle body is less likely to be discharged to the rear side from the outer portion of the bulged portion 40 of the rear inner cover 25A. However, the vehicle rear side of the rear cover 25B is opened toward the vehicle rear side. Therefore, the mesh structure part 41 provided in the rear inclined part 40R of the bulging part 40 is electrically connected to the outside through the opening on the rear part side of the rear part cover 25B.

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

During normal running of a vehicle in which the throttle operation is relatively gentle, as shown by the solid line arrow in FIG. 32 flows into the air cleaner 27 through the air cleaner 27 through the air guide passage 39 provided inside the rear side cover 25 . At this time, the traveling wind changes its direction toward the inside in the vehicle width direction from the bulging portion 40 in the rear region of the traveling wind guide passage 39 and is introduced into the space S facing the air intake port 31 of the air cleaner 27 . Then, the running wind introduced into the intake port 31 is cleaned by the air cleaner 27 and flows into the intake portion of the engine 2 .

On the other hand, when the throttle valve is suddenly opened by the driver, insufficient air intake will occur only by relying on the running wind flowing in from the running wind intake port 32, and the intake port 31 of the air cleaner 27 Part becomes negative pressure. Thereby, negative pressure acts on the mesh structure part 41 provided in the rear inclined part 40R of the bulging part 40 from the inside direction of the bulging part 40. As shown in FIG. As a result, as shown by the dashed arrow in FIG. 5 , the external air outside the bulging portion 40 enters the inside of the bulging portion 40 through the through-hole 41a of the mesh structure portion 41, and the external air is sucked into the air cleaner 27. air intake. As a result, a sufficient amount of outside air quickly flows into the intake portion of the engine 2 from the travel wind intake port 32 and the mesh structure portion 41 .

As described above, in the motorcycle 1 of the present embodiment, the mesh structure portion 41 (introduction air adjustment portion) is provided. Since the outside air is additionally taken in from the traveling wind inlet 32, when the driver suddenly opens the throttle, it can be quickly taken into the engine 2 through the traveling wind inlet 32 and the mesh structure portion 41. outside air. Furthermore, the structure adopted in the motorcycle 1 of the present embodiment does not simply enlarge the cross-sectional area of the traveling wind guide passage 39, but only when the air intake portion side of the traveling wind guide passage 39 becomes a negative pressure, the Since the mesh structure part 41 takes in the outside air, it is also possible to avoid the inconvenience that the rear side cover 25 becomes larger than necessary.

Therefore, when the motorcycle 1 according to the present embodiment is adopted, the increase in the output of the engine 2 corresponding to the opening operation of the throttle valve can be achieved while suppressing the increase in size of the rear side cover 25 .

In addition, in the motorcycle 1 according to the present embodiment, the mesh structure portion 41 serving as the intake air regulating portion is arranged at a position closer to the intake port 31 of the air cleaner 27 than the traveling wind intake port 32 . Therefore, when the driver suddenly opens the throttle valve and the vicinity of the air intake port 31 of the air cleaner 27 becomes a negative pressure, the mesh structure portion 41 close to the air intake port 31 can quickly clean the air. Gas supply. Therefore, when this structure is adopted, the output of the engine 2 can be increased more rapidly in response to the opening operation of the throttle valve.

In addition, in the motorcycle 1 according to the present embodiment, the bulging portion 40, which is a guide wall arranged on the outer side in the vehicle width direction and guides the running wind toward the air intake port 31 of the air cleaner 27, is provided in the running wind guide passage. 39, a mesh structure portion 41 that is an introduction air adjustment portion is formed on the bulging portion 40. Therefore, when the vehicle is normally running, the running wind is guided by the inner surface of the bulging portion 40 and easily flows toward the air intake port 31 of the air cleaner 27, and the running wind can be prevented from passing through the mesh structure portion 41 and flowing toward the bulging portion. The outside of the 40 leaks. On the other hand, when the intake port 31 of the air cleaner 27 becomes negative pressure due to the driver's sudden throttle opening operation, the external air can also be supplied from the outside of the bulging portion 40 through the mesh structure portion 41 . gas. Therefore, when this structure is adopted, the introduction air adjustment unit 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 on the front inclined portion 40F of the bulging portion 40, and the mesh structure portion 41 can be formed by the rear wall 42r of the concave portion 42. The direction of the running wind is changed inward in the vehicle width direction on the front side of the vehicle. Therefore, it is possible to more favorably suppress the traveling wind from leaking to the outside of the bulging portion 40 through the mesh structure portion 41 .

In addition, in the motorcycle 1 according to the present embodiment, the mesh structure part 41 is provided in the bulging part 40 formed in the rear region of the travel wind guide passage 39 so as to bulge outward in the vehicle width direction. When a person peeks at the travel wind inlet 32 on the front side, the mesh structure portion 41 cannot be visually recognized through the travel wind inlet 32 . As a result, the exterior design of the motorcycle 1 is improved. In addition, in the case of the present embodiment, since the mesh structure portion 41 is provided on the bulging portion 40 that bulges outward in the vehicle width direction, the traveling wind that goes straight from the traveling wind inlet 32 toward the rear region is less likely to directly hit the mesh. The structure portion 41 can further suppress the leakage of the traveling wind taken in from the traveling wind inlet 32 through the mesh structure portion 41 .

Furthermore, in the motorcycle 1 according to the present embodiment, the mesh structure portion 41 is provided on the rear inclined portion 40R of the bulging portion 40 serving as the guide wall. Therefore, during normal running of the vehicle, the traveling wind passing through the traveling wind guide passage 39 smoothly flows toward the air cleaner 27 along the inner surface of the rear inclined portion 40R, and the passing of the traveling wind through the mesh structure portion 41 can be effectively suppressed. Instead, it leaks to the outside of the bulging portion 40 . Also, even when water enters the rear opening of the rear cover 25B during car washing, the water that hits the outer surface of the rear slope 40R flows outward in the vehicle width direction along the outer surface of the rear slope 40R. Therefore, it is difficult for water flow to enter toward the air inlet 31 of the air cleaner 27 through the mesh structure portion 41 during car washing.

In particular, in the case of the present embodiment, since the through-hole 41a formed in the mesh structure portion 41 of the rear inclined portion 40R is formed along the vehicle width direction, even if the water flow directly touches the mesh structure portion 41 from the rear side of the vehicle body, It is also advantageously suppressed that the water flow enters the inner side of the bulge 40 through the through-hole 41a.

In addition, in the motorcycle 1 according to the present embodiment, the mesh structure portion 41 serving as the introduction air adjustment portion is provided on one side (right side) in the vehicle width direction, and the air intake port 31 of the air cleaner 27 faces the vehicle. The other side (left side) of the width direction is set. Therefore, even if water droplets enter the inside of the bulging portion 40 through the mesh structure portion 41 during car washing, the air intake port 31 of the air cleaner 27 faces the side opposite to the side where the mesh structure portion 41 is arranged, and the water droplets are less likely to flow. Inhaled directly from the air intake 31 of the air cleaner 27 . Therefore, it is possible to more reliably avoid troubles caused by water droplets entering the intake portion of the engine 2 .

In addition, this invention is not limited to the said embodiment, Various design changes are possible in the range which does not deviate from the summary. For example, in the above-mentioned embodiment, the side cover arranged on the right side of the vehicle body is provided with the travel wind inlet 32, the travel wind guide passage 39, the bulging part 40, the mesh structure part 41, etc., but they may also be provided The side cover is arranged on the left side of the vehicle body. In addition, they may be provided on the side covers on the left and right sides of the vehicle body.

In addition, the straddle type vehicle of the present invention is not limited to motorized two-wheel vehicles (including bicycles with prime movers and scooter-type vehicles), but also includes three wheels (in addition to the front and rear two wheels, it also includes the front two wheels) and the rear-wheeled vehicle) or a small four-wheeled vehicle.

Explanation of reference signs:

1...motorized two-wheel vehicle (straddle type vehicle)

2...Engine (internal combustion engine)

24...Front side cover (side cover)

25...Rear side cover (side cover)

27…air filter

31…air inlet

32...Driving air inlet

39...Traveling wind guide passage

40...Protruding part

40R...Rear inclined part (inclined part)

41...Mesh structure part (introduction air adjustment part).

Claims (6)

1. A straddle type vehicle, wherein, The straddle vehicle has: an internal combustion engine (2); and side covers (24, 25), which cover the sides of the vehicle, The side covers (24, 25) have: Travel wind inlet (32), which takes in travel wind from the front of the vehicle; a traveling wind guide passage (39) for guiding traveling wind taken in from the traveling wind inlet (32) to an air intake portion of the internal combustion engine (2); and An introduction air adjustment unit (41) that is additionally directed toward the traveling direction relative to the traveling wind inlet (32) when the air intake portion side in the traveling wind guide passage (39) becomes negative pressure. The wind guide passage (39) takes in external air. 2. The straddle type vehicle according to claim 1, wherein: The intake air adjustment unit (41) is arranged at an intake air of an air cleaner (27) of the vehicle provided on an intake side of the internal combustion engine (2) closer to the travel air inlet (32). The position of the mouth (31). 3. The straddle type vehicle according to claim 1 or 2, wherein: The traveling wind guide passage (39) has a guide wall (40) arranged on the outer side in the vehicle width direction and allows the traveling wind to flow along the inner surface of the guide wall (40), A mesh structure part (41) is provided on at least a part of the guide wall (40), The introduction air adjustment part is composed of the mesh structure part (41). 4. The straddle type vehicle according to claim 3, wherein: The mesh structure portion (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) that is opposite to a portion extending from the traveling wind inlet (32) toward the rear side of the vehicle. The upstream portion of the travel wind guide passage (39) is inclined inward in the vehicle width direction. 6. The saddled vehicle according to any one of claims 1 to 5, wherein: The introduction air adjustment part (41) is arranged on one side of the vehicle, and the air inlet (31) of the air filter (27) of the vehicle arranged on the air intake side of the internal combustion engine (2) faces the vehicle The other side setting.