JP5460376B2 - Saddle riding vehicle - Google Patents

Description

  The present invention relates to a straddle-type vehicle including a muffler covered with a protector.

Conventionally, a straddle-type vehicle such as a motorcycle in which a muffler that silences exhaust from an engine is disposed on a side portion of the rear of the vehicle is known. The muffler is often covered with a protector that protects the muffler and suppresses contact between the muffler and an occupant.
A straddle-type vehicle is known in which ventilation holes for securing ventilation to a muffler are provided on the side surface and upper surface of such a protector (see, for example, Patent Document 1).
The vent of the protector described in Patent Document 1 is arranged behind the legs of the occupant (rider).

JP 2009-162093 A

However, the vent of the protector described in Patent Document 1 is located at a place where the traveling wind is disturbed by the leg of the rider.
Therefore, it is difficult to ensure ventilation to the muffler, and it is difficult to improve the cooling performance of the muffler.
Moreover, when expanding a ventilation port in order to ensure the ventilation to a muffler, it is necessary to improve the rigidity of a protector. As a result, the weight of the protector may increase.

  An object of the present invention is to provide a straddle-type vehicle that can achieve both improvement in cooling performance of a muffler and weight reduction of a protector.

  According to the first aspect of the present invention, there is provided a muffler that is disposed on a rear side of the vehicle and silences exhaust from the engine, a protector that covers the muffler, and a ventilation that is formed in the protector and guides the traveling wind to the muffler. A straddle-type vehicle comprising: an opening for use; and a step for placing a leg portion in a state where an occupant is in the riding state, wherein the opening for ventilation is disposed below the step and faces downward It is provided on the lower surface of the protector as described above.

  The invention according to claim 2 is characterized in that, in addition to the configuration according to claim 1, the protector is open to the inside of the muffler in the vehicle width direction.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the front surface of the muffler is inclined downward toward the rear of the vehicle in a side view, and the ventilation opening is The muffler is arranged to face the front surface of the muffler.

  According to a fourth aspect of the present invention, in addition to the configuration according to any one of the first to third aspects, an under cowl that is disposed in front of the protector and covers a lower part of the vehicle is provided. The lower surface thereof is arranged to be higher than the lower surface of the protector, and the ventilation opening is arranged on the outer side in the vehicle width direction with respect to the under cowl in front view.

  According to a fifth aspect of the present invention, in addition to the configuration according to any one of the first to fourth aspects, the muffler includes a first muffler disposed on the outer side in the vehicle width direction, and the first muffler. A second muffler that is also arranged on the exhaust upstream side and that is arranged on the inner side in the vehicle width direction with respect to the step, and a muffler connecting portion that includes a tubular member that connects the first muffler and the second muffler so as to communicate with each other. The protector covers a side surface of the first muffler, the second muffler, and the muffler connecting portion on the outer side in the vehicle width direction.

  According to a sixth aspect of the present invention, in addition to the structure according to any one of the first to fifth aspects, the protector includes a first surface formed below and forward of the ventilating opening. A first surface formed by the first surface and the road surface in a cross-section in the vehicle width direction at a position where the ventilation opening is provided. Is larger than a second angle formed by the second surface and the road surface.

  In the invention described in claim 7, in addition to the configuration described in claim 6, the ventilation opening has a long shape having a longitudinal direction in a direction substantially parallel to the longitudinal direction of the vehicle. Features.

  According to an eighth aspect of the invention, in addition to the configuration of the sixth or seventh aspect, the first surface is an inclined surface that extends outward in the vehicle width direction toward the rear of the vehicle.

  According to invention of Claim 1, the opening part for ventilation is arrange | positioned below a step, and is provided in the lower surface of a protector so that the downward direction may be faced. Therefore, it is possible to locate the opening for ventilation in places where turbulent flow due to the occupant's legs is unlikely to occur, and the running wind flowing between the saddle-ride type vehicle and the road surface is efficiently introduced into the muffler from this ventilation opening. can do. This eliminates the need to increase the size of the ventilation opening and eliminates the need to increase the rigidity of the protector. Therefore, it is possible to achieve both improvement of the cooling performance of the muffler and weight reduction of the protector.

  According to the second aspect of the present invention, the traveling wind introduced from the ventilation opening of the protector is discharged from the inner side in the vehicle width direction of the muffler without being blocked by the protector after the muffler is cooled. The Therefore, the cooling efficiency of the muffler can be improved.

  According to the third aspect of the present invention, the traveling wind introduced from the ventilation opening of the protector hits the front surface of the muffler and is cooled, and then flows toward the rear of the vehicle along the inclination of the front surface. Therefore, the traveling wind is smoothly guided toward the rear of the vehicle by the protector without hindering the flow in the front-rear direction. Therefore, the cooling efficiency of the muffler can be improved.

  According to the fourth aspect of the present invention, the traveling wind can be rectified by the under cowl and guided to the lower surface of the protector. Therefore, the motor performance of the motorcycle can be improved by this rectifying effect. Moreover, the opening part for ventilation of a protector is arrange | positioned in the position which does not inhibit introduction | transduction of the running wind by an under cowl. Therefore, the cooling efficiency of the muffler can be improved.

  According to the invention described in claim 5, a plurality of mufflers (first muffler and second muffler) can be covered with the same protector. Therefore, the number of parts of the protector can be reduced. Further, by connecting a plurality of mufflers (first muffler and second muffler) with a muffler connecting portion, the weight can be reduced, and the entire muffler can be covered with the same protector. Therefore, a sense of unity of the muffler structure can be created and the appearance can be improved.

  According to the sixth aspect of the present invention, in the cross section in the vehicle width direction of the ventilation opening, the first angle formed by the first surface and the road surface is greater than the second angle formed by the second surface and the road surface. Is also big. Therefore, traveling resistance of traveling wind flowing on the surface of the first surface can be reduced, and traveling wind can be introduced into the ventilation opening on the second surface.

  According to the invention described in claim 7, the ventilation opening has a long shape having a longitudinal direction in a direction substantially parallel to the vehicle longitudinal direction. Therefore, it can reduce that the opening part for ventilation is exposed to a passenger | crew side, and can improve external appearance property.

  According to the invention described in claim 8, the first surface is an inclined surface that extends outward in the vehicle width direction as it goes rearward of the vehicle. Therefore, the flow of the traveling wind can be controlled from the center side in the vehicle width direction of the vehicle to the outside by the first surface, and the traveling wind whose flow is controlled is efficiently passed through the second surface to the ventilation opening. Can be guided.

1 is a right side view showing a motorcycle according to an embodiment of the present invention. 1 is a front view showing a motorcycle according to an embodiment of the present invention. Fig. 2 is a rear view showing the motorcycle according to the embodiment of the present invention. Fig. 3 is a right side view showing a rear part of the motorcycle according to the embodiment of the present invention. Fig. 2 is a bottom view showing the rear part of the motorcycle according to the embodiment of the present invention. It is a front view which shows the muffler and protector of embodiment of this invention. It is a right view which shows the protector of embodiment of this invention. It is a top view which shows the protector of embodiment of this invention. It is sectional drawing which shows the cross section of the vehicle width direction of a protector in the position in which the opening part for ventilation was provided.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG. In the present embodiment, a motorcycle as a saddle type vehicle will be described. FIG. 1 is a right side view showing a motorcycle according to an embodiment of the present invention. In the following description, descriptions of front and rear, left and right, and up and down directions are in accordance with the direction seen from the occupant (driver) who rides the saddle riding type vehicle unless otherwise specified. In the figure, the arrow FR indicates the front of the vehicle, the arrow LH indicates the left side of the vehicle, and the arrow UP indicates the upper side of the vehicle.

  First, the overall configuration of the motorcycle 1 will be described with reference to FIG. As shown in FIG. 1, a motorcycle 1 according to this embodiment includes a body frame 5, a front wheel 2, a front fork 3 that is supported by the body frame 5 and pivotally supports the front wheel 2, and a handle connected to the front fork 3. 4, the engine 20 suspended on the vehicle body frame 5, the rear wheel 17 that is a driving wheel, and a swing that is swingably attached to the vehicle body frame 5 via a rear cushion 58 and pivotally supports the rear wheel 17. Arm 60, fuel tank 51 for storing fuel, occupant seat 85, body cover 90 that covers the body frame 5, front fender 97 that covers the front wheel 2, and rear fender 98 that covers the rear wheel 17. The muffler 30, the protector 40 covering the muffler 30, the ventilation opening 45 formed in the protector 40, and the occupant (driver) in the riding state It constituted a step 18 for location, the mainly.

  The vehicle body frame 5 is configured by integrally joining a plurality of types of steel materials by welding or the like, and forms a skeleton of the vehicle body. The vehicle body frame 5 includes, for example, a head pipe (not shown) that is disposed at the front end of the vehicle body frame 5 and supports the front fork 3, a pair of left and right main frames 7 that extend obliquely downward and rearward from the head pipe in a side view, A pair of left and right seat rails (not shown) connected to the main frame 7 and supporting the fuel tank 51, the seat 85, and the like, and a plurality of cross members (not shown) connecting the pair of main frames 7, the seat rails and the like in the left and right direction. Etc.).

  The engine 20 is a motor (for example, a four-cycle single-cylinder water-cooled engine) of the motorcycle 1, and is mounted at a substantially central portion in the front-rear direction of the vehicle body frame 5, as shown in FIG. The engine 20 is disposed so that a crankshaft (not shown) is along the left-right direction of the vehicle body. An exhaust pipe 28 that exhausts exhaust gas is connected to the engine 20. The exhaust pipe 28 extends, for example, toward the right side surface at the rear of the vehicle body through the lower side of the engine 20.

The muffler 30 is connected to the rear end portion of the exhaust pipe 28 (see FIGS. 1, 3 and 4), and reduces exhaust noise. The protector 40 is formed so as to cover the muffler 30 at least from the outside in the vehicle width direction. Details of the muffler 30 and the protector 40 will be described later.
The step 18 is disposed slightly rearward from the center of the vehicle body in a side view, and is disposed above the front portion of the muffler 30.

The body cover 90 includes a front cowl 91, a center cowl 92, a middle cowl 95, an under cowl 93, and a rear cowl 94.
The front cowl 91 covers the front of the head pipe (not shown). The center cowl 92 is connected to the rear part of the front cowl 91 and covers both side surfaces of the front part of the vehicle body. The middle cowl 95 is connected to the rear part of the center cowl 92 and covers both side surfaces of the center part of the vehicle body. The under cowl 93 covers the vehicle lower side. The side surface of the under cowl 93 is disposed on the inner side in the vehicle width direction than the side surface of the protector 40 in front view. The rear cowl 94 covers the rear part of the vehicle body.

  Next, the muffler 30 and the protector 40 of the motorcycle 1 that are characteristic portions of the present embodiment will be described with reference to FIGS. 1 to 9. FIG. 2 is a front view showing the motorcycle 1 according to the embodiment of the present invention. FIG. 3 is a rear view showing the motorcycle 1 according to the embodiment of the present invention. FIG. 4 is a right side view showing the rear part of the motorcycle 1 according to the embodiment of the present invention. FIG. 5 is a bottom view showing the rear part of the motorcycle 1 according to the embodiment of the present invention. FIG. 6 is a front view showing the muffler 30 and the protector 40 according to the embodiment of the present invention. FIG. 7 is a right side view showing the protector 40 according to the embodiment of the present invention. FIG. 8 is a plan view showing the protector 40 according to the embodiment of the present invention. FIG. 9 is a cross-sectional view showing a cross section in the vehicle width direction of the protector 40 at a position where the ventilation opening 45 is provided, and shows a cross section taken along the line AA in FIG.

  First, the muffler 30 will be described with reference to FIGS. The muffler 30 is connected to the rear end portion of the exhaust pipe 28 (see FIGS. 1, 4 and 6), and reduces exhaust noise. As shown in FIGS. 4 and 5, the muffler 30 includes a first muffler 31, a second muffler 32, and a muffler connection portion 33.

  The first muffler 31 is configured as a container having a substantially triangular cross section in the vehicle width direction. An exhaust port 31 c for exhausting exhaust is provided on the rear surface of the first muffler 31. As shown in FIGS. 4 and 6, a first muffler support stay 65 is fixed to the upper surface of the rear portion of the first muffler 31 and the inner side surface in the vehicle width direction. The first muffler support stay 65 fixes the first muffler 31 to the pillion step stay 64 (see FIG. 4) at the rear of the vehicle body frame 5. The first muffler support stay 65 includes a locking piece 65 a that locks the upper portion of the rear portion of the protector 40.

As shown in FIG. 4, the front surface 31 a of the first muffler 31 is inclined downward toward the rear of the vehicle in a side view.
Further, as shown in FIGS. 3 to 5, the first muffler 31 is disposed on the outer side (right side) of the vehicle body in the vehicle width direction, and is disposed behind the step 18.

  As shown in FIGS. 4 to 6, the second muffler 32 is configured as a container having a substantially triangular cross section in the vehicle width direction. As shown in FIG. 6, a second muffler support stay 66 and a protector support stay 34 are fixed to the second muffler 32. The second muffler support stay 66 is fixed to the upper surface of the front portion of the second muffler 32. The second muffler support stay 66 fixes the second muffler 32 to a lower portion of a substantially central portion in the front-rear direction of the body frame 5. As shown in FIG. 6, the protector support stay 34 is fixed in the vicinity of the apex portion 32 c on the outer side (right side) of the triangle in the vehicle width direction in the second muffler 32 whose cross section in the vehicle width direction is formed in a substantially triangular shape. Is done.

As shown in FIGS. 5 and 6, the second muffler 32 is arranged on the front side of the first muffler 31 and is arranged on the inner side in the vehicle width direction than the step 18. The second muffler 32 is arranged offset to the first muffler 31 side with respect to the center C in the vehicle width direction (see FIG. 5).
Moreover, as shown in FIG. 6, the 2nd muffler 32 is arrange | positioned so that the vertex part 32c may be located in the protector 40 side. Therefore, the range (vertical width) that covers the second muffler 32 by the protector 40 can be made compact.

  As shown in FIGS. 4 and 5, the muffler connecting portion 33 is a cylindrical member that connects the first muffler 31 and the second muffler 32 so that they can communicate with each other. The front end portion of the muffler connection portion 33 is connected to the rear surface of the second muffler 32. The rear end portion of the muffler connection portion 33 is connected to the front surface 31 a of the first muffler 31.

  The muffler connecting portion 33 is smaller in cross-sectional shape than the first muffler 31 and the second muffler 32. The swing arm 60 is disposed so as to pass above the muffler connecting portion 33.

  Next, the protector 40 will be described. As shown in FIGS. 4 and 5, the protector 40 covers the side surface 31 b of the first muffler 31, the side surface 32 a of the second muffler 32, and the side surface 33 a of the muffler connection portion 33 on the outer side in the vehicle width direction. The protector 40 covers a part of the front surface 32b of the second muffler 32. And the protector 40 is open | released by the vehicle width direction inner side and the downward side of the muffler 30, as shown in FIG.3 and FIG.5.

As shown in FIGS. 7 and 8, the protector 40 includes a first side surface portion 52, a second side surface portion 53, and a lower surface portion 54 as the lower surface 41.
The first side surface portion 52 covers the side surface 31b (see FIGS. 4 and 5) of the first muffler 31 on the outer side in the vehicle width direction and is formed wide. The first side surface portion 52 includes a fastening hole portion 42 that is a means for fixing to the first muffler 31, and stay members 56 and 57. The fastening hole 42 and the stay members 56 and 57 will be described later.

  The second side surface portion 53 is formed to be narrower than the first side surface portion 52, and is connected to the first side surface portion 52, so that the side surface 33 a (see FIGS. 4 and 5) of the muffler connection portion 33 and the second muffler 32. The side surface 32a is covered. The second side surface portion 53 has a fastening hole portion 43 that is a means for fixing to the second muffler 32. The fastening hole 43 will be described later.

The lower surface portion 54 of the protector 40 includes a ventilation opening 45, a first surface 46, a second surface 48, and a guide wall surface 55.
As shown in FIG. 2, the lower surface portion 54 (lower surface 41) is arranged to be lower than the lower surface 93 a of the under cowl 93.

  The ventilation opening 45 is disposed in front of the front surface 31a of the first muffler 31 and is opened in the lower surface 41 of the protector 40 so as to face the front surface 31a. More specifically, as shown in FIGS. 2 and 4, the ventilation opening 45 is disposed below and behind the step 18 and is provided so as to face downward.

The ventilation opening 45 is disposed on the outer side in the vehicle width direction than the under cowl 93 when viewed from the front.
As shown in FIG. 5, the ventilation opening 45 has a long shape having a longitudinal direction in a direction substantially parallel to the center C (vehicle longitudinal direction) in the vehicle width direction.

As shown in FIGS. 4 to 7, the first surface 46 is formed below and in front of the ventilation opening 45. As shown in FIG. 5, the first surface 46 is an inclined surface that extends outward in the vehicle width direction (in a direction away from the center C) toward the rear of the vehicle.
As shown in FIGS. 4 to 7, the second surface 48 is formed around the ventilation opening 45, and introduces the traveling air flowing along the first surface 46 and the guide wall surface 55 into the ventilation opening 45. .
The guide wall surface 55 is formed on the upper portion of the lower surface portion 54 so as to become wider toward the rear and to be continuous with the front portion of the second surface 48. The guide wall surface 55 introduces the traveling air flowing mainly along the lower surface portion 54 into the ventilation opening 45.

  The relationship between the first surface 46 and the second surface 48 is as follows. As shown in FIG. 9, in the cross section in the vehicle width direction at the position where the ventilation opening 45 is provided, the angle formed by the first surface 46 and the road surface 49 is the first angle a1, and the second surface 48 and the road surface When the angle formed by 49 is the second angle a2, the first angle a1 is larger than the second angle a2.

  The protector 40 configured as described above is formed by, for example, forming a steel plate and subjected to heat resistant coating.

  Next, fixing means for the muffler 30 and the protector 40 will be described. As shown in FIGS. 6 to 8, a stay member 56 is fixed to the upper part of the back surface of the rear part of the protector 40. The stay member 56 is locked to the locking piece 65a (see FIGS. 4 and 6) of the first muffler support stay 65.

  A fastening hole portion 42 and a stay member 57 are provided in the lower portion of the rear portion of the protector 40. Screw means 67 (see FIG. 4) is inserted into the fastening hole portion 42. A stay member 57 is fixed to the back surface of the protector 40 corresponding to the position of the fastening hole 42. As shown in FIGS. 7 and 8, the stay member 57 has a through hole 57a through which the screw means 67 (see FIG. 4) is inserted. That is, the lower part of the rear part of the protector 40 is fastened to the first muffler 31 by the screw means 67 (see FIG. 4) via the stay member 57 and a stay member (not shown) provided on the first muffler 31. .

As shown in FIGS. 6 to 8, a fastening hole 43 is provided in the upper portion of the front portion of the protector 40. Screw means 68 (see FIGS. 4 and 6) is inserted into the fastening hole 43. The upper portion of the front portion of the protector 40 is fastened to the protector support stay 34 of the second muffler 32 by the screw means 68.
In this way, the protector 40 is fixed to the muffler 30.

According to the motorcycle 1 of the present embodiment described above, the following effects are exhibited.
The motorcycle 1 of the present embodiment includes a muffler 30, a protector 40 that covers the muffler 30, a ventilation opening 45 that is formed in the protector 40 and guides traveling wind to the muffler 30, and step 18. The ventilation opening 45 is disposed below the step 18 and is provided on the lower surface 41 of the protector 40 so as to face the lower side.

  Therefore, the ventilation opening 45 can be positioned in a place where turbulence due to the occupant's leg is unlikely to occur, and traveling wind flowing between the motorcycle 1 and the road surface 49 can be efficiently exhausted from the ventilation opening 45. 30. Thereby, it is not necessary to enlarge the ventilation opening 45, and it is not necessary to increase the rigidity of the protector 40. Therefore, the improvement of the cooling performance of the muffler 30 and the weight reduction of the protector 40 can be compatible.

  Further, in the motorcycle 1 of the present embodiment, the protector 40 is opened to the inside of the muffler 30 in the vehicle width direction. Therefore, after the muffler 30 is cooled, the traveling wind introduced from the ventilation opening 45 of the protector 40 is discharged from the inner side in the vehicle width direction of the muffler 30 without being blocked by the protector 40. Therefore, the cooling efficiency of the muffler 30 can be improved.

  The first muffler 31 is disposed outside the swing arm 60 in the vehicle width direction, and the protector 40 is not disposed on the muffler 30 on the swing arm 60 side. Therefore, the muffler 30 can be disposed close to the swing arm 60 while preventing the muffler 30 from interfering with the swing arm 60. Therefore, the mass of the motorcycle 1 can be concentrated.

  Further, in the motorcycle 1 of the present embodiment, the front surface 31a of the first muffler 31 is inclined downward toward the rear of the vehicle in a side view. The ventilation opening 45 is disposed to face the front surface 31 a of the first muffler 31.

  Therefore, the traveling wind introduced from the ventilation opening 45 of the protector 40 hits the front surface 31a of the first muffler 31 and is cooled, and then flows toward the rear of the vehicle along the inclination of the front surface 31a. Thereby, the protector 40 guides smoothly toward the rear of the vehicle without obstructing the flow in the front-rear direction. Therefore, the cooling efficiency of the first muffler 31 can be improved.

  Further, in the rear view, the lower surface of the first muffler 31 is not covered by the protector 40 and is exposed. Therefore, the traveling wind introduced from the ventilation opening 45 of the protector 40 is efficiently discharged from the lower side of the muffler 30 without being blocked by the protector 40. Furthermore, the traveling wind that has cooled the muffler 30 is attracted by the traveling wind that flows under the muffler 30 and is efficiently discharged to the rear of the vehicle.

  In the motorcycle 1 of the present embodiment, an under cowl 93 that covers the vehicle lower side is provided in front of the protector 40. The under cowl 93 is disposed such that the lower surface 93 a is above the lower surface 41 of the protector 40. The ventilation opening 45 is disposed on the outer side in the vehicle width direction than the under cowl 93 when viewed from the front.

  Therefore, the traveling wind can be rectified by the under cowl 93 and guided to the lower surface 41 of the protector 40. Therefore, the exercise performance of the motorcycle 1 can be improved. Further, since the ventilation opening 45 of the protector 40 is disposed at a position that does not hinder the introduction of the traveling wind by the under cowl 93, the cooling efficiency of the muffler 30 can be improved.

  Further, in the motorcycle 1 of the present embodiment, the muffler 30 includes a first muffler 31, a second muffler 32, a muffler connection portion 33 that connects the first muffler 31 and the second muffler 32 so as to communicate with each other, Have The protector 40 covers the side surfaces 31b, 32a, 33a on the outer side in the vehicle width direction of the first muffler 31, the second muffler 32, and the muffler connecting portion 33.

Therefore, a plurality of mufflers (the first muffler 31 and the second muffler 32) can be covered with the same protector 40. Therefore, the number of parts of the protector 40 can be reduced.
Further, by connecting the plurality of mufflers 30 (the first muffler 31 and the second muffler 32) with the muffler connecting portion 33, the weight can be reduced, and the entire muffler 30 is covered with the same protector 40. Can do. Therefore, a sense of unity of the structure of the muffler 30 can be created, and the appearance can be improved.

  In addition, the swing arm 60 is disposed so as to pass over the muffler connection portion 33 with respect to the muffler connection portion 33. Therefore, the muffler 30 (first muffler 31) can be arranged further upward while avoiding interference with the swing arm 60. Therefore, the center of gravity can be brought to the approximate center in the height direction of the vehicle, and the exercise performance can be improved.

  Further, in the motorcycle 1 of the present embodiment, the protector 40 includes a first surface 46 formed below and forward of the ventilation opening 45 and a second surface formed around the ventilation opening 45. 48. In the cross section in the vehicle width direction of the ventilation opening 45, the first angle a1 is larger than the second angle a2. Therefore, the traveling resistance of the traveling wind flowing on the surface of the first surface 46 can be reduced, and the traveling wind can be introduced into the ventilation opening 45 of the second surface 48.

  Further, in the motorcycle 1 of the present embodiment, the ventilation opening 45 has a long shape having a longitudinal direction in a direction substantially parallel to the vehicle longitudinal direction. Therefore, exposure of the ventilation opening 45 to the occupant side can be reduced, and appearance can be improved. Moreover, since it becomes difficult to visually recognize the muffler connecting portion 33 and the like from the ventilation opening 45, the appearance can be improved.

  In the motorcycle 1 of the present embodiment, the first surface 46 is an inclined surface that extends outward in the vehicle width direction as it goes rearward of the vehicle. Therefore, the flow of the traveling wind can be controlled from the center C side to the outside in the vehicle width direction of the vehicle by the first surface 46, and the traveling wind whose flow is controlled is passed through the second surface 48 for ventilation. It can be efficiently guided to the opening 45.

As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, in the above-described embodiment, the present invention is applied to a so-called full cowl type motorcycle as a saddle riding type vehicle, but is not limited thereto. For example, the present invention may be applied to a three-wheel straddle-type vehicle, a four-wheel rough terrain vehicle, or a motorcycle other than a full cowl motorcycle. That is, the saddle riding type vehicle includes all vehicles that ride on the vehicle body.

1 Motorcycle (saddle-ride type vehicle)
18 step 20 engine 30 muffler 31 first muffler 31a front surface 31b side surface 32 second muffler 32a side surface 33 muffler connecting portion 33a side surface 40 protector 41 lower surface 45 ventilation opening 46 first surface 48 second surface 49 road surface 54 lower surface portion (lower surface) )
a1 First angle a2 Second angle 93 Under cowl 93a Bottom surface

Claims (7)

A muffler disposed on the rear side of the vehicle to mute the exhaust from the engine;
A protector covering the muffler;
A ventilation opening formed in the protector for guiding the running wind to the muffler;
Placing a leg while the occupant is on board;
A straddle-type vehicle comprising:
The ventilation opening is disposed below the step, and is provided on the lower surface of the protector so as to face the lower side .
The front surface of the muffler is inclined downward toward the rear of the vehicle in a side view,
The ventilating opening is a straddle-type vehicle disposed to face the front surface of the muffler .   The straddle-type vehicle according to claim 1, wherein the protector is open to an inner side in a vehicle width direction of the muffler. It is arranged in front of the protector, and includes an under cowl that covers the vehicle lower side,
The under cowl is arranged such that its lower surface is above the lower surface of the protector,
The ventilation opening is straddle-type vehicle according to claim 1 or 2 is arranged outside in the vehicle width direction than the under cowl in front view. The muffler includes a first muffler disposed on the outer side in the vehicle width direction, a second muffler disposed on the exhaust upstream side of the first muffler and disposed on the inner side in the vehicle width direction of the step, and the first muffler. A muffler connecting portion made of a cylindrical member that connects the muffler and the second muffler so that they can communicate with each other;
The straddle-type vehicle according to any one of claims 1 to 3 , wherein the protector covers a side surface of the first muffler, the second muffler, and the muffler connection portion on an outer side in a vehicle width direction. The protector has a first surface formed below and forward of the ventilation opening, and a second surface formed around the ventilation opening,
In a cross section in the vehicle width direction at the position where the ventilation opening is provided, a first angle formed by the first surface and the road surface is larger than a second angle formed by the second surface and the road surface. The straddle-type vehicle according to any one of claims 1 to 4 . The straddle-type vehicle according to claim 5 , wherein the ventilation opening has an elongated shape having a longitudinal direction in a direction substantially parallel to the longitudinal direction of the vehicle. The straddle-type vehicle according to claim 5 or 6 , wherein the first surface is an inclined surface that extends outward in the vehicle width direction as it goes rearward of the vehicle.

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