JP2011132909A - Saddle-ride type vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saddle-ride type vehicle including a motor-driven throttle valve and achieved in further compact size. <P>SOLUTION: This saddle-ride type vehicle includes: a head pipe; a main frame 3; an engine 13 in which a cylinder block 15 and a cylinder head 16 are projected forward from a crankcase; an intake pipe 19 extended from the upper side of the cylinder head 16 toward the upper front; the throttle valve disposed in the middle of the intake pipe 19 and rotatably supported by a first rotating shaft 202 extending in the vehicle width direction; and a valve driving motor 220 for driving the throttle valve. A second rotating shaft 221 of the valve driving motor 220 is provided at one end side of the first rotating shaft 202 of the throttle valve so that the extending direction of the second rotating shaft 221 is orthogonal to the extending direction of the first rotating shaft 202. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a straddle-type vehicle such as a motorcycle.

  2. Description of the Related Art Conventionally, in a motorcycle in which an engine is attached to a lower part of a main frame that extends rearward and downward from a head pipe, an intake chamber that takes in external air into the engine is provided below the main frame and above the front of the engine. The intake chamber and the engine are connected by an intake pipe, and a throttle valve for adjusting the amount of air supplied to the engine is arranged in the intake pipe. Such a layout structure is mainly used in small motorcycles.

  In motorcycles, electric throttle valves that electrically control the opening and closing of the throttle valve in accordance with the throttle operation by the occupant are becoming widespread. A valve drive motor for driving the throttle valve is disposed above the throttle valve. The drive shaft is arranged so as to be parallel to the rotation shaft of the throttle valve (see, for example, Patent Document 1).

JP 2008-45434 A

  In the electric throttle valve as described above, the valve drive motor is disposed immediately above the intake pipe. For this reason, when an electric throttle valve is applied to the layout structure of a small motorcycle, the position of the main frame is increased by the amount corresponding to the valve drive motor. On the other hand, if the position of the main frame is maintained, the position of the engine is lowered, so that the minimum ground clearance is easily affected.

  An object of the present invention is to provide a straddle-type vehicle that can be made more compact in a straddle-type vehicle having an electric throttle valve.

  The invention according to claim 1 includes a head pipe that rotatably supports the steering device, a main frame that is formed of a single frame that extends rearward and downward from the head pipe, a crankcase, a cylinder, and a cylinder head. An engine in which the crankcase is supported below the main frame, the cylinder and the cylinder head project forward from the crankcase, and an intake pipe extending from the upper part of the cylinder head of the engine toward the front upper side. An intake pipe arranged so as to overlap the main frame in a top view, and a throttle valve arranged in the middle of the intake pipe for adjusting the amount of air supplied to the engine, in the vehicle width direction A throttle valve that is rotatably supported by the extending first rotation shaft, and the occupant operates A straddle-type vehicle including a valve drive motor that drives the throttle valve in response to an input from a cropping wheel, wherein a second rotation shaft that is a rotation shaft of the valve drive motor is the first rotation of the throttle valve. A direction in which the second rotating shaft extends and a direction in which the first rotating shaft extends are provided on one end side of the shaft so as to be orthogonal to each other.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the valve drive motor is disposed above the first rotation shaft of the throttle valve.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect, the valve drive motor is arranged so as to overlap the main frame in a side view.

  According to a fourth aspect of the invention, in addition to the configuration of the third aspect, the valve drive motor is supported by the main frame.

  According to a fifth aspect of the invention, in addition to the configuration of the second aspect, an intake chamber that communicates with the intake pipe is provided on the upstream side of the intake pipe, and the valve drive motor is configured to be It is arranged to overlap with the intake chamber.

  According to a sixth aspect of the invention, in addition to the configuration of the fifth aspect, the valve drive motor is supported by the intake chamber.

  According to a seventh aspect of the invention, in addition to the configuration of the fifth or sixth aspect, the intake chamber includes a concave portion on a side surface thereof, and the valve driving motor is disposed in the concave portion. Features.

  According to an eighth aspect of the present invention, in addition to the configuration according to the seventh aspect, the intake chamber includes a rib that covers a portion of the valve drive motor projecting outward from the recess from the front. To do.

  According to a ninth aspect of the present invention, in addition to the configuration according to the first aspect, the intake pipe has an intake pipe located downstream of the throttle valve, and the valve drive motor has a side view. In this case, the air intake pipe is disposed so as to overlap the intake pipe.

  According to a tenth aspect of the present invention, in addition to the configuration according to the ninth aspect, the valve drive motor is supported by the intake pipe.

  According to an eleventh aspect of the present invention, in addition to the configuration according to the first aspect, the valve drive motor is disposed so as to overlap the cylinder head in a side view.

  According to a twelfth aspect of the invention, in addition to the configuration of the eleventh aspect, the valve drive motor is supported by the cylinder head.

  According to a thirteenth aspect of the invention, in addition to the configuration of the eleventh or twelfth aspect, the valve drive motor is supported on the cam chain side of the cylinder head.

According to the first aspect of the present invention, the direction in which the second rotating shaft extends and the direction in which the first rotating shaft extends are arranged such that the second rotating shaft of the valve drive motor is disposed at one end of the first rotating shaft of the throttle valve. It is provided so as to be orthogonal. According to this, since the valve drive motor is not disposed immediately above the intake pipe, it is not necessary to raise the position of the main frame by the amount corresponding to the valve drive motor. Therefore, when an electric throttle valve is applied to the layout structure of the saddle riding type vehicle,
A more compact vehicle can be obtained.

  According to the second aspect of the present invention, the valve drive motor is disposed above the first rotation shaft of the throttle valve. For this reason, the valve drive motor can be separated from the engine. Therefore, the valve drive motor is less susceptible to the heat generated by the engine. In addition, the valve drive motor can be arranged in the vicinity of the side of the intake pipe with enough space so that the second rotating shaft extends in the vertical direction, so that the valve drive motor can be placed horizontally above the intake pipe. Compared to the arrangement, lateral protrusions by the valve drive motor can be reduced.

  According to the third aspect of the present invention, the valve drive motor is disposed so as to overlap the main frame in a side view. For this reason, the position of the main frame can be lowered. That is, the position of the main frame can be lowered by disposing at least a part of the main frame in a space formed by the valve drive motor and the throttle valve. Thereby, a passenger | crew's boarding / alighting property can be improved more.

  According to the fourth aspect of the present invention, the valve drive motor is supported by the main frame. For this reason, the heavy valve drive motor can be firmly supported by the relatively rigid main frame.

  According to the fifth aspect of the present invention, the valve drive motor is disposed so as to overlap the intake chamber in a side view. For this reason, the valve drive motor can be separated from the engine. Therefore, the valve drive motor is less susceptible to the heat generated by the engine.

  According to the sixth aspect of the present invention, the valve drive motor is supported by the intake chamber. In such a configuration, the valve drive motor can be more firmly fixed.

  According to the seventh aspect of the present invention, the recess is provided in the side surface of the intake chamber, and the valve drive motor is disposed in the recess. For this reason, the valve drive motor can be arranged without protruding in the lateral width direction of the intake chamber or with a small degree of protrusion. Further, the valve drive motor can be brought close to the center of the vehicle body by disposing the valve drive motor in the recess. For this reason, the position of the center of gravity of the vehicle can be made closer to the center of the vehicle body. Therefore, the center of gravity of the vehicle can be brought closer to the center of the vehicle body while ensuring the capacity of the intake chamber.

  Further, the valve drive motor disposed in the recess of the intake chamber is covered with the intake chamber when viewed from the front. For this reason, the valve drive motor can be protected by the intake chamber even if solids such as stones, water or the like flies from the front of the intake chamber. Further, since it is not necessary to attach a protective member or the like to the valve drive motor, it is possible to suppress an increase in weight and cost.

  According to the eighth aspect of the present invention, the intake chamber includes a rib that covers the valve drive motor projecting outward from the recess from the front. For this reason, the valve drive motor can be protected by the rib of the intake chamber. Further, since it is not necessary to attach a protective member or the like to the valve drive motor, it is possible to suppress an increase in weight and cost.

  According to the ninth aspect of the present invention, the valve drive motor is disposed so as to overlap the intake pipe disposed downstream of the throttle valve in a side view. Therefore, the heavy valve drive motor can be moved toward the center of the vehicle body. For this reason, the position of the center of gravity of the vehicle can be made closer to the center of the vehicle body. Further, the lateral protrusion by the valve drive motor can be reduced.

  According to the invention described in claim 10, the valve drive motor is supported by the intake pipe. For this reason, a heavy valve drive motor can be firmly supported by the intake pipe.

  According to the eleventh aspect of the present invention, the valve drive motor is disposed so as to overlap the cylinder head in a side view. Therefore, a heavy valve drive motor can be disposed below the vehicle body. For this reason, the center of gravity of the vehicle body can be lowered.

  According to the twelfth aspect of the present invention, the valve drive motor is supported by the cylinder head. For this reason, the heavy valve drive motor can be firmly supported by the cylinder head.

  According to the invention described in claim 13, the valve drive motor is supported on the cam chain side of the cylinder head. Among cylinder heads, the temperature on the cam chain side is relatively low. For this reason, by supporting the valve drive motor on the cam chain side, the valve drive motor is less susceptible to the heat generated by the cylinder head.

1 is a left side view showing an overall configuration of a motorcycle according to a first embodiment. 1 is a side view around an engine of a motorcycle according to a first embodiment. It is a schematic diagram of the aa line cross section of FIG. FIG. 6 is a side view around an engine of a motorcycle according to a second embodiment. It is a schematic diagram which shows the bb line cross section of FIG. It is a schematic diagram which shows the other structure in the bb line cross section of FIG. It is a schematic diagram of the cc line cross section of FIG. It is a side view around the engine of the motorcycle in a 3rd embodiment. It is a schematic diagram which shows the dd line cross section of FIG. It is a side view around the engine of the motorcycle in a 4th embodiment. It is a schematic diagram which shows the ee sectional view of FIG. It is a schematic diagram which shows the ff sectional view of FIG.

  Hereinafter, an embodiment in which a saddle riding type vehicle according to the present invention is applied to a small motorcycle (hereinafter referred to as “motorcycle”) will be described with reference to the drawings. First, the overall configuration of the motorcycle according to the first embodiment will be described with reference to FIG. In each figure, an arrow FR indicates the front of the vehicle, an arrow LH indicates the left side of the vehicle, and an arrow UP indicates the upper side of the vehicle.

(First embodiment)
FIG. 1 is a left side view showing the overall configuration of the motorcycle in the present embodiment. As shown in FIG. 1, the motorcycle 1 according to this embodiment includes a main frame 3 and a rear frame 4 as a body frame 2. The main frame 3 is joined to the rear side surface of the head pipe 5 at the front end by welding. The main frame 3 extends from the head pipe 5 so as to be inclined rearward and downward. The rear frame 4 is joined to the rear end of the main frame 3 by welding. The main frame 3 and the rear frame 4 are each made of a steel pipe. The main frame 3 is constituted by a steel pipe having a substantially round cross section. In addition to this, it may be configured by other shapes and members. For example, an aluminum casting having a shape such as an I-shaped cross section or a U-shaped cross section opening downward can be used.

  A front fork 6 is attached to the head pipe 5 so as to be steerable. The front fork 6 rotatably supports the front wheel 7. A rear fork 9 is attached to the rear frame 4. Specifically, the front end of the rear fork 9 is rotatably attached to the lower end of the rear frame 4. The rear fork 9 rotatably supports the rear wheel 8. The rear fork 9 and the rear frame 4 are connected by a rear cushion 10.

  A saddle 11 on which an occupant sits is attached to the upper surface of the rear frame 4. The fuel tank 12 is stored immediately below the saddle 11 and inside the rear frame 4. The fuel tank 12 is held by the rear frame 4.

  Further, a crankcase 14 of an engine 13 serving as a prime mover is attached to the rear frame 4. The crankcase 14 is located below the joint 2 a between the rear frame 4 and the main frame 3. The engine 13 includes a cylinder block 15 as a cylinder on the front side of the crankcase 14. The cylinder block 15 protrudes from the front surface of the crankcase 14 and is disposed substantially horizontally. Further, the engine 13 includes a cylinder head 16 on the front side of the cylinder block 15. The crankcase 14, the cylinder block 15, and the cylinder head 16 are integrally assembled as the engine 13.

  An air cleaner 17 as an intake chamber is attached below the front end of the main frame 3. The air cleaner 17 and the intake port 18 (see FIG. 2) of the cylinder head 16 are connected via an intake pipe 19. The intake pipe 19 is disposed below the main frame 3. A throttle valve unit 20 to be described later is attached to the intake pipe 19. The throttle valve unit 20 is a unit that adjusts the amount of air supplied to the engine 13 by electronic control according to the operation of the throttle by the occupant.

  The main frame 3, cylinder block 15, cylinder head 16, air cleaner 17, intake pipe 19, and throttle valve unit 20 are covered with a front cover 31. The front cover 31 is attached to the upper surface of the main frame 3 and covers the side and upper side of the cylinder block 15 of the engine 13 from the main frame 3. As described above, the motorcycle 1 according to the present embodiment is obtained by applying an electric throttle valve (hereinafter, abbreviated as “throttle valve”) to the layout structure of a general small motorcycle.

  The overall configuration of the motorcycle in the first embodiment described above is common to each embodiment. Next, the structure of the throttle valve unit characteristic of the motorcycle described above will be described. In addition, in each figure, in order to make the structure of the main part intelligible, a member is suitably shown with a dashed-two dotted line. Moreover, in each figure, the code | symbol of the already demonstrated member and the code | symbol of the member which need not be demonstrated are abbreviate | omitted suitably.

  FIG. 2 is a side view around the engine of the motorcycle according to the first embodiment. FIG. 3 is a schematic diagram of a cross section taken along the line aa in FIG. In FIG. 3, the cross-section and shape of the members are appropriately simplified or omitted for easy explanation.

  As shown in FIG. 2, the intake pipe 19 includes a connecting tube 21 and an intake pipe 22. The connecting tube 21 has a bent portion in the middle, and is formed in a substantially L shape as a whole. The upper part of the connecting tube 21 protrudes into the air cleaner 17 and opens. The lower part of the connecting tube 21 is connected to the suction side of the throttle valve unit 20.

  Similarly to the connecting tube 21, the intake pipe 22 has a bent portion in the middle and is formed in a substantially L shape as a whole. The upper part of the intake pipe 22 is connected to the discharge side of the throttle valve unit 20. A lower portion of the intake pipe 22 is connected to the intake port 18 of the cylinder head 16. As shown in FIG. 3, the intake pipe 22 is disposed so as to overlap the main frame 3 when viewed from above (in FIG. 3, the intake pipe 22 (not shown) is at the same position as the intake pipe 19). Further, the intake pipe 22 includes a fuel injection valve 23 on the upper surface side of the bent portion. The fuel injection valve 23 is supplied with fuel from a fuel inlet (not shown) provided at the upper end, and injects fuel toward the intake port 18 in a mist form from an opening (not shown) provided at the lower end.

  As shown in FIG. 3, the throttle valve unit 20 includes a throttle body 200, a gear box 210, and a valve drive motor 220.

  The throttle body 200 includes a rose fly type throttle valve 201. The throttle valve 201 is rotatably supported by a throttle valve case 203 described later by a first rotating shaft 202. The throttle valve 201 and the first rotating shaft 202 constituting the throttle body 200 are housed in a throttle valve case 203. One end of the first rotating shaft 202 is connected to the throttle position sensor 24. The throttle position sensor 24 is attached to the outer surface of the throttle valve case 203.

  The throttle position sensor 24 detects the opening / closing angle of the throttle valve 201, converts it into an electric signal, and transmits it to a control device (not shown) of the throttle valve unit 20. The control device compares the control amount (target value) of the opening / closing angle calculated according to the operation of the throttle by the occupant with the detected amount of the opening / closing angle of the throttle valve 201 transmitted from the throttle position sensor 24 in real time. The feedback control of the opening / closing angle is carried out. Further, the other end of the first rotating shaft 202 penetrates through a throttle valve case 203 and a wall surface of a gear box case 219 described later and protrudes into the gear box 210 as described later.

  The gear box 210 is a device that decelerates the rotational speed of the rotational output generated by the valve drive motor 220 using a reduction gear. The gear box 210 includes a first bevel gear 211, a second bevel gear 212, a first spur gear 213, and a second spur gear 214. The first bevel gear 211 is attached to the second rotation shaft 221. The second bevel gear 212 meshes with the first bevel gear 211 and is attached to the third rotating shaft 215. The 2nd rotating shaft 221 and the 3rd rotating shaft 215 are arrange | positioned so that it may mutually orthogonally cross.

  The second rotation shaft 221 is a shaft that transmits the rotation output of the valve drive motor 220. The third rotating shaft 215 is supported on the gear box case 219 by bearings 216 and 217 so as to be rotatable. A first spur gear 213 is attached to the bearing 217 side of the second bevel gear 212. The first spur gear 213 is attached to the third rotating shaft 215 and rotates together with the second bevel gear 212.

  On the other hand, the other end of the first rotating shaft 202 protrudes into the gear box 210 and supports the second spur gear 214. The other end of the first rotating shaft 202 is rotatably supported by a bearing 218. Each gear, rotating shaft, and bearing described above are housed in a gear box case 219 formed into a box frame shape. The gear box case 219 is connected to a throttle valve case 203 that houses the throttle body 200.

  The valve drive motor 220 is a drive source that generates a rotational output for driving the throttle valve 201. The valve drive motor 220 of this embodiment is configured by a cylindrical DC motor. The valve drive motor 220 is housed in the gear box case 219. As shown in FIG. 3, the second rotation shaft 221 of the valve drive motor 220 has a first rotation direction in the direction in which the second rotation shaft 221 extends on the other end side of the first rotation shaft 202 to which the throttle valve 201 is attached. It arrange | positions so that the direction where the axis | shaft 202 extends may be orthogonal.

  The rotational output generated by the valve drive motor 220 is transmitted in the order of the first bevel gear 211, the second bevel gear 212, the first spur gear 213, and the second spur gear 214. The rotation output generated by the valve drive motor 220 is decelerated according to the reduction ratio set for each gear while being transmitted by each gear, and rotates the first rotation shaft 202. Specifically, the rotational output generated by the valve drive motor 220 is high rotation and low torque. This rotational output is decelerated by the gear box 210, so that the rotational output is converted into a rotational output with high torque and low rotation.

  As shown in FIG. 2, the throttle valve unit 20 of the present embodiment is arranged such that the valve drive motor 220 is above the first rotation shaft 202 of the throttle body 200. Further, the valve drive motor 220 is disposed so as to overlap the main frame 3 in a side view. Further, the gear box case 219 is supported by the main frame 3 at a portion where the valve drive motor 220 is accommodated.

  As shown in FIG. 3, the gear box case 219 includes a mounting bracket 222 in the vicinity of a portion in which the valve drive motor 220 is accommodated. The attachment bracket 222 is an attachment member formed integrally with the gear box case 219. The mounting bracket 222 includes a hole (not shown) through which the bolt 25 passes.

  The main frame 3 includes a pedestal 3 a for fixing the gear box case 219. The base 3a is attached to the side surface of the main frame 3 by welding. The pedestal 3a includes a screw hole (not shown) of a female screw that fits with a male screw of a bolt 25 used for fastening the gear box case 219. The gear box case 219 of the throttle valve unit 20 can be fixed to the main frame 3 by disposing the mounting bracket 222 at the position of the base 3 a and screwing it to the base 3 a with the bolt 25 and the washer 26.

  Thus, in the throttle valve unit 20 of the present embodiment, the gear box case 219 has the throttle body 200 side connected to the throttle valve case 203 and the valve drive motor 220 side supported by the main frame 3.

The motorcycle 1 according to the first embodiment described above has the following effects.
In the motorcycle 1 of the first embodiment, the second rotation shaft 221 of the valve drive motor 220 is connected to the other end side of the first rotation shaft 202 of the throttle body 200 and the direction in which the second rotation shaft 221 extends and the first rotation shaft. It is provided so that the direction in which 202 extends is orthogonal. According to this, since the valve drive motor 220 is not disposed immediately above the intake pipe 19, it is not necessary to raise the position of the main frame 3 by the amount corresponding to the valve drive motor 220. Therefore, in the motorcycle 1 having the electric throttle valve 201 and the space above which the occupant's feet can pass when getting on and off the main frame 3, the occupant's feet interfere with the front cover 31 when the occupant gets on and off. It is possible to prevent problems that are easy to occur. This effect is common to the second to fourth embodiments described later.

  Since the valve drive motor 220 is disposed above the first rotation shaft 202 of the throttle body 200, the valve drive motor 220 can be separated from the engine 13. Therefore, the valve drive motor 220 is less susceptible to the heat generated by the engine 13.

  Since the valve drive motor 220 can be disposed near the side of the intake pipe 19 having a sufficient space, the valve drive motor 220 is compared with the case where the valve drive motor 220 is disposed horizontally above the intake pipe 19. The lateral protrusion due to 220 can be reduced. In addition, the protrusion in the horizontal direction by the valve drive motor 220 can be further reduced by moving the valve drive motor 220 toward the main frame 3 side. Further, the lateral width of the gear box 210 can be further reduced by changing the configuration of the reduction gear.

  Since the valve drive motor 220 is disposed so as to overlap the main frame 3 in a side view, the position of the main frame 3 can be lowered. That is, as shown in FIG. 3, the position of the main frame 3 can be lowered by disposing at least a part of the main frame 3 in a space A formed by the valve drive motor 220 and the throttle body 200. Thereby, a passenger | crew's boarding / alighting property can be improved more.

  Since the valve driving motor 220 is supported by the main frame 3, the heavy valve driving motor 220 can be firmly supported by the main frame 3 having relatively high rigidity.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. FIG. 4 is a side view around the engine of the motorcycle according to the second embodiment. The overall configuration of the motorcycle in the second embodiment is the same as that of the first embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The second embodiment is mainly different from the first embodiment in the configuration and arrangement of the throttle valve unit 20A. Therefore, the second embodiment will be described focusing on the throttle valve unit 20A.

  As shown in FIG. 4, the throttle valve unit 20 </ b> A in the second embodiment is disposed so as to overlap the air cleaner 17 in a side view. The throttle valve unit 20A is supported by the air cleaner 17.

  Next, the configuration of the air cleaner 17 and the throttle valve unit 20A will be described. FIG. 5 is a schematic diagram of a cross section taken along line bb of FIG. FIG. 6 is a schematic diagram showing another configuration of the cross section taken along the line bb of FIG. In FIG. 4, ribs 27c described later in other configurations are indicated by imaginary lines. In FIGS. 5 and 6, the cross-section and shape of the members are appropriately simplified or omitted for easy explanation.

  As shown in FIG. 5, the air cleaner 17 includes an air cleaner case 27, a case cover 28, and a cleaner element 29. As shown in FIG. 4, the air cleaner case 27 is disposed immediately below the main frame 3 in front of the engine 13. The air cleaner case 27 includes an opening 27a on the front surface.

  Further, as shown in FIG. 4, a protrusion 27b for attaching the throttle valve unit 20A is formed on the surface of the air cleaner case 27 on the engine 13 side. The projecting portion 27 b is a convex portion formed integrally with the air cleaner case 27. The protrusion 27b includes a hole (not shown) for attaching the throttle valve unit 20A.

  Further, as shown in FIG. 5, the air cleaner case 27 includes a recess B on the rear left side surface. The valve drive motor 220 of the throttle valve unit 20A is disposed in the recess B. Further, the valve drive motor 220 is disposed in the recess B so that the second rotating shaft 221 (see FIG. 4) is substantially in the vertical direction. With such a configuration, the valve drive motor 220 can be arranged without protruding in the width direction of the air cleaner 17. The recess B is provided on the rear air cleaner case 27 side. Furthermore, the recessed part B is provided in the position which does not overlap with the air cleaner case 27 in the side view. According to this, it is not necessary to narrow the width dimension of the cleaner element 29. Therefore, there is no need to prepare a dedicated size cleaner element 29, and parts can be shared. Further, it is possible to prevent the performance of the cleaner element 29 from being deteriorated by reducing the capacity by reducing the width of the cleaner element 29.

  In the configuration of FIG. 5, the valve drive motor 220 may be arranged so as to protrude in the lateral width direction of the air cleaner 17. That is, when a part of the valve drive motor 220 protrudes in the lateral width direction of the air cleaner 17 due to the layout of the vehicle body, the air cleaner case 27 is configured as shown in FIG.

  In FIG. 6, the air cleaner case 27 includes a rib 27c. The rib 27c is a member that protrudes outward from the recess B of the air cleaner case 27 in the left direction. That is, the rib 27c has a shape that covers the entire valve drive motor 220 from the front. In addition, the shape which covers a part of valve drive motor 220 from the front may be sufficient.

  The rib 27c may be formed integrally with the air cleaner case 27 as in the present embodiment, or may be formed integrally with the case cover 28, or attached as a separate component completely. There may be. In addition, the shape of the rib 27c is not limited to the configuration illustrated in FIG. 6, and may be extended so as to cover the side surface of the valve drive motor 220, for example. Hereinafter, in 2nd Embodiment, as shown in FIG. 6, the air cleaner case 27 is demonstrated as the thing provided with the rib 27c.

  The case cover 28 is a member that is attached to the front side of the air cleaner case 27 and closes the opening 27 a of the air cleaner case 27. As shown in FIG. 4, the case cover 28 includes an opening 28 a at the top. The opening 28a is connected to an inlet duct 32 that takes in outside air.

  The cleaner element 29 is held between the air cleaner case 27 and the case cover 28 as shown in FIG. The cleaner element 29 has a function of purifying the air flowing from the inlet duct 32 on the front surface side (dirty side) and supplying clean air to the intake pipe 19 from the back surface side (clean side). The periphery of the cleaner element 29 is sealed by a seal member (not shown).

  FIG. 7 is a schematic diagram of a cross section taken along the line cc of FIG. In FIG. 7, the cross-section and shape of the members are appropriately simplified or omitted for easy explanation. As shown in FIG. 7, the throttle valve unit 20 </ b> A includes a throttle body 200, a gear box 210, and a valve drive motor 220.

  The configuration of the throttle body 200 is the same as that of the first embodiment. The throttle body 200 includes a butterfly type throttle valve 201, a first rotating shaft 202, and a throttle valve case 203. In the throttle body 200, one end side of the first rotating shaft 202 is connected to the throttle position sensor 24.

  The gear box 210 includes a first spur gear 223, a second spur gear 224, a first bevel gear 225, and a second bevel gear 226. The first spur gear 223 is attached to a second rotating shaft 221 that transmits the rotational output of the valve drive motor 220. The second spur gear 224 meshes with the first spur gear 223 and is supported on the third rotating shaft 215. The 2nd rotating shaft 221 and the 3rd rotating shaft 215 are arrange | positioned so that it may mutually become parallel.

  The third rotating shaft 215 is rotatably supported by the gear box case 219 by a bearing 227. A first bevel gear 225 is attached to the opposite side of the second spur gear 224 from the bearing 227. The first bevel gear 225 is supported by the third rotating shaft 215 and rotates together with the second spur gear 224. On the other hand, the other end of the first rotating shaft 202 protrudes into the gear box 210 and supports the second bevel gear 226. The other end of the first rotating shaft 202 is rotatably supported by a bearing 228. Each gear, rotating shaft, and bearing described above are housed in a gear box case 219. The gear box case 219 is connected to a throttle valve case 203 that houses the throttle body 200.

  The valve drive motor 220 is housed in the gear box case 219. As shown in FIG. 7, the second rotation shaft 221 of the valve drive motor 220 has a first rotation direction in the direction in which the second rotation shaft 221 extends on the other end side of the first rotation shaft 202 to which the throttle valve 201 is attached. It arrange | positions so that the direction where the axis | shaft 202 extends may be orthogonal.

  The rotation output generated by the valve drive motor 220 is transmitted in the order of the first spur gear 223, the second spur gear 224, the first bevel gear 225, and the second bevel gear 226. The rotation output generated by the valve drive motor 220 is decelerated according to the reduction ratio set for each gear while being transmitted by each gear, and rotates the first rotation shaft 202.

  As shown in FIG. 4, the throttle valve unit 20 </ b> A of the present embodiment is disposed so that the valve drive motor 220 overlaps the air cleaner 17 in a side view. The gear box case 219 of the throttle valve unit 20 </ b> A is supported by the air cleaner case 27 in a portion where the valve drive motor 220 is accommodated.

  As shown in FIG. 7, the gear box case 219 includes a mounting bracket 229 in the vicinity of a portion in which the valve drive motor 220 is accommodated. The attachment bracket 229 is an attachment member formed integrally with the gear box case 219. The mounting bracket 229 includes a hole (not shown) through which the bolt 25 passes.

  As described above, the air cleaner case 27 includes the protrusion 27b for attaching the throttle valve unit 20A. The mounting bracket 229 of the throttle valve unit 20A is disposed at the position of the protrusion 27b of the air cleaner case 27 and screwed to the protrusion 27b with a bolt 25, a washer 26, and a nut 30 as shown in FIG. Thus, the gear box case 219 of the throttle valve unit 20A can be fixed to the air cleaner 17.

  Thus, in the throttle valve unit 20A of the present embodiment, the gear box case 219 has the throttle body 200 side connected to the throttle valve case 203 and the valve drive motor 220 side supported by the air cleaner case 27.

  According to the motorcycle 1 of the second embodiment described above, the following effects can be obtained in addition to the effects common to the first embodiment described above.

  Since the valve drive motor 220 is disposed so as to overlap the air cleaner 17 in a side view, the valve drive motor 220 can be separated from the engine 13. Therefore, the valve drive motor 220 is less susceptible to the heat generated by the engine 13. In addition, since the position of the main frame 3 can be lowered, if the space above the main frame 3 is a space through which the occupant's feet pass when getting on and off, the occupant's ability to get on and off can be further improved.

  Since the air cleaner 17 is mainly made of a resin or the like, it can be easily molded into various shapes. Therefore, the fixed part (projection part 27b etc.) of the valve drive motor 220 can be easily formed. For this reason, when the valve drive motor 220 is supported by the air cleaner 17, a fixing portion of the valve drive motor 220 can be easily secured. According to this, the flexibility of layout design can be enhanced. Further, since the air cleaner 17 has a large surface area, the fixed portion of the valve drive motor 220 can be enlarged, or a plurality of fixed portions can be provided. In such a configuration, the valve drive motor 220 can be more firmly fixed.

  As shown in FIG. 5, the recess B is provided on the side surface of the air cleaner case 27, and the valve drive motor 220 is arranged in the recess B. Can be arranged without.

  As shown in FIG. 5, since the recess B is provided on the rear air cleaner case 27 side, it is not necessary to reduce the width of the cleaner element 29. Therefore, there is no need to prepare a dedicated size cleaner element 29, and parts can be shared. Further, it is possible to prevent the performance of the cleaner element 29 from being deteriorated by reducing the capacity by reducing the width of the cleaner element 29.

  Further, by disposing the valve drive motor 220 in the recess B, the valve drive motor 220 can be brought closer to the center of the vehicle body. For this reason, the position of the center of gravity of the vehicle can be made closer to the center of the vehicle body. Therefore, according to the configuration of the present embodiment, the center of gravity of the vehicle can be brought closer to the center of the vehicle body while securing the capacity of the cleaner element 29.

  The valve drive motor 220 disposed in the recess B of the air cleaner case 27 is covered with the air cleaner 17 in a front view. For this reason, the valve drive motor 220 can be protected by the case cover 28 of the air cleaner 17 even if solids such as stones, water, etc. fly from the front of the air cleaner 17. Further, since it is not necessary to attach a protective member or the like to the valve drive motor 220, it is possible to suppress an increase in weight and cost. Furthermore, since the valve drive motor 220 can be protected from the above-described contamination by flying objects, maintenance and inspection are facilitated.

  Even when a part of the valve drive motor 220 protrudes in the lateral width direction of the air cleaner 17, the valve drive motor 220 is protected by the rib 27c of the air cleaner case 27 by providing the rib 27c on the air cleaner case 27 as shown in FIG. be able to.

  In the configuration shown in FIG. 6 as well, since it is not necessary to reduce the width of the cleaner element 29, it is not necessary to prepare a dedicated-size cleaner element 29, and parts can be shared. Moreover, the performance degradation of the cleaner element 29 which arises by narrowing the width dimension of the cleaner element 29 can be prevented.

  Further, since it is not necessary to attach a protective member or the like to the valve drive motor 220, an increase in weight and an increase in cost can be suppressed. Furthermore, also in the configuration shown in FIG. 6, the valve drive motor 220 can be protected from dirt and the like due to flying objects as described above, so that maintenance and inspection are facilitated.

  In the present embodiment, an example in which the air cleaner 17 is used as an intake chamber having an air purification function has been described. However, the valve drive motor 220 may be supported by an intake chamber having no purification function. .

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. 8 and 9. FIG. 8 is a side view around the engine of the motorcycle according to the third embodiment. FIG. 9 is a schematic diagram illustrating a cross section taken along the line dd of FIG. In FIG. 9, the cross-section and shape of the members are appropriately simplified or omitted for easy explanation. The overall configuration of the motorcycle in the third embodiment is the same as that of the first embodiment. In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The third embodiment differs from the first embodiment mainly in the configuration and arrangement of the throttle valve unit 20B. Therefore, the third embodiment will be described focusing on the throttle valve unit 20B.

  As shown in FIG. 8, the throttle valve unit 20 </ b> B of the third embodiment is disposed so as to overlap the intake pipe 22 in a side view. The throttle valve unit 20B is supported by the intake pipe 22.

  Next, the configuration of the throttle valve unit 20B will be described. As shown in FIG. 9, the throttle valve unit 20 </ b> B includes a throttle body 200, a gear box 210, and a valve drive motor 220.

  The basic configuration of the throttle body 200 is the same as that of the first embodiment. The throttle body 200 includes a butterfly type throttle valve 201, a first rotating shaft 202, and a throttle valve case 203. In the throttle body 200, one end side of the first rotating shaft 202 is connected to the throttle position sensor 24.

  The gear box 210 includes a first bevel gear 231, a second bevel gear 232, a first spur gear 233, and a second spur gear 234. The first bevel gear 231 is attached to the second rotation shaft 221. The second bevel gear 232 meshes with the first bevel gear 231 and is attached to the third rotating shaft 215. The 2nd rotating shaft 221 and the 3rd rotating shaft 215 are arrange | positioned so that it may mutually orthogonally cross.

  The second rotation shaft 221 is a shaft that transmits the rotation output of the valve drive motor 220. The third rotating shaft 215 is rotatably supported by bearings 235 and 236. A first spur gear 233 is attached to the bearing 236 side of the second bevel gear 232. The first spur gear 233 is attached to the third rotating shaft 215 and rotates together with the second bevel gear 232.

  On the other hand, the other end of the first rotating shaft 202 protrudes into the gear box 210 and supports the second spur gear 234. The other end of the first rotating shaft 202 is rotatably supported by a bearing 237. Each gear, rotating shaft, and bearing described above are housed in a gear box case 219. The gear box case 219 is connected to a throttle valve case 203 that houses the throttle body 200.

  The valve drive motor 220 is housed in the gear box case 219. As shown in FIG. 9, the second rotation shaft 221 of the valve drive motor 220 has a first rotation direction in the direction in which the second rotation shaft 221 extends on the other end side of the first rotation shaft 202 to which the throttle valve 201 is attached. It arrange | positions so that the direction where the axis | shaft 202 extends may be orthogonal.

  The rotational output generated by the valve drive motor 220 is transmitted in the order of the first bevel gear 231, the second bevel gear 232, the first spur gear 233, and the second spur gear 234. The rotation output generated by the valve drive motor 220 is decelerated according to the reduction ratio set for each gear while being transmitted by each gear, and rotates the first rotation shaft 202.

  As shown in FIG. 8, the throttle valve unit 20 </ b> B of the present embodiment is disposed so that the valve drive motor 220 overlaps the intake pipe 22 in a side view. Further, the gear box case 219 is supported by the intake pipe 22 in a portion where the valve drive motor 220 is accommodated.

  As shown in FIG. 9, the gear box case 219 includes a mounting bracket 238 in the vicinity of a portion in which the valve drive motor 220 is accommodated. The mounting bracket 238 is a mounting member formed integrally with the gear box case 219. The mounting bracket 238 includes a hole (not shown) through which the bolt 25 passes.

  The intake pipe 22 includes a pedestal 22a for mounting the throttle valve unit 20B. The pedestal 22a is formed so that a part of the side surface of the intake pipe 22 has a convex shape. The intake pipe 22 is made of, for example, a metal member such as aluminum, hard resin, or the like. The pedestal 22a is provided with a screw hole (not shown) of a female screw that fits with a male screw of a bolt 25 used for fastening the gear box case 219. The mounting bracket 238 of the throttle valve unit 20B is disposed at the position of the base 22a of the intake pipe 22 and screwed to the base 22a with a bolt 25 and a washer 26 as shown in FIG. The gear box case 219 can be fixed to the intake pipe 22.

  Thus, in the throttle valve unit 20B of the present embodiment, the gear box case 219 has the throttle body 200 side connected to the throttle valve case 203 and the valve drive motor 220 side supported by the intake pipe 22.

  According to the motorcycle 1 of the third embodiment described above, the following effects can be obtained in addition to the effects common to the first embodiment.

  Since the valve drive motor 220 is arranged so as to overlap the intake pipe 22 in a side view, the heavy valve drive motor 220 can be moved toward the center of the vehicle body. For this reason, the position of the center of gravity of the vehicle can be made closer to the center of the vehicle body. Further, the lateral protrusion by the valve drive motor 220 can be reduced.

  Since the valve drive motor 220 is supported by the intake pipe 22, the heavy valve drive motor 220 can be firmly supported by the intake pipe 22.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. FIG. 10 is a side view around the engine of the motorcycle according to the fourth embodiment. FIG. 11 is a schematic diagram of a cross section taken along the line ee of FIG. FIG. 12 is a schematic diagram illustrating a cross section taken along line ff of FIG. In FIG. 11 and FIG. 12, the cross section and shape of the members are appropriately simplified or omitted for easy explanation. The overall configuration of the motorcycle in the fourth embodiment is the same as that of the first embodiment. In the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The fourth embodiment is mainly different from the first embodiment in the configuration and arrangement of the throttle valve unit 20C. Therefore, the fourth embodiment will be described focusing on the throttle valve unit 20C.

  As shown in FIG. 10, the throttle valve unit 20 </ b> C of the fourth embodiment is disposed so as to overlap the cylinder head 16 in a side view. The throttle valve unit 20C is supported on the cam chain 35 (see FIG. 12) side of the cylinder head 16.

  Next, the configuration of the throttle valve unit 20C will be described. As shown in FIG. 11, the throttle valve unit 20 </ b> C includes a throttle body 200, a gear box 210, and a valve drive motor 220.

  The basic configuration of the throttle body 200 is the same as that of the first embodiment. The throttle body 200 includes a butterfly type throttle valve 201, a first rotating shaft 202, and a throttle valve case 203. In the throttle body 200, one end side of the first rotating shaft 202 is connected to the throttle position sensor 24.

  The gear box 210 includes a first bevel gear 241, a second bevel gear 242, a first spur gear 243, and a second spur gear 244. The first bevel gear 241 is attached to the second rotation shaft 221. The second bevel gear 242 meshes with the first bevel gear 241 and is attached to the third rotating shaft 215. The 2nd rotating shaft 221 and the 3rd rotating shaft 215 are arrange | positioned so that it may mutually orthogonally cross.

  The second rotation shaft 221 is a shaft that transmits the rotation output of the valve drive motor 220. The third rotating shaft 215 is rotatably supported by bearings 245 and 246. A first spur gear 243 is attached to the bearing 246 side of the second bevel gear 242. The first spur gear 243 is attached to the third rotation shaft 215 and rotates together with the second bevel gear 242.

  On the other hand, the other end of the first rotating shaft 202 protrudes into the gear box 210 and supports the second spur gear 244. Further, the other end of the first rotating shaft 202 is rotatably supported by a bearing 247. Each gear, rotating shaft, and bearing described above are housed in a gear box case 219. The gear box case 219 is connected to a throttle valve case 203 that houses the throttle body 200.

  The valve drive motor 220 is housed in the gear box case 219. As shown in FIG. 11, the second rotation shaft 221 of the valve drive motor 220 has a first rotation direction in the direction in which the second rotation shaft 221 extends on the other end side of the first rotation shaft 202 to which the throttle valve 201 is attached. It arrange | positions so that the direction where the axis | shaft 202 extends may be orthogonal.

  The rotational output generated by the valve drive motor 220 is transmitted in the order of the first bevel gear 241, the second bevel gear 242, the first spur gear 243, and the second spur gear 244. The rotation output generated by the valve drive motor 220 is decelerated according to the reduction ratio set for each gear while being transmitted by each gear, and rotates the first rotation shaft 202.

  As shown in FIG. 10, the throttle valve unit 20 </ b> C of the present embodiment is arranged such that the valve drive motor 220 overlaps the cylinder head 16 in a side view. Further, the gear box case 219 is supported by the cylinder head 16 in a portion where the valve drive motor 220 is accommodated.

Next, a support structure for the throttle valve unit 20C and the cylinder head 16 will be described.
As shown in FIG. 12, the gear box case 219 includes a mounting bracket 248 on the upper part of the portion that houses the valve drive motor 220. The mounting bracket 248 is a mounting member formed integrally with the gear box case 219. The mounting bracket 248 includes a hole (not shown) through which the bolt 25 passes.

  On the other hand, the cylinder head 16 includes a pedestal 16a for mounting the throttle valve unit 20C. The pedestal 16a is formed so that a part of the side surface of the cylinder head 16 has a convex shape. The pedestal 16a is provided with a screw hole (not shown) of a female screw that fits with a male screw of a bolt 25 used for fastening the gear box case 219. The pedestal 16 a is provided on the side surface of the cylinder head 16.

  The cylinder head 16 includes a camshaft 33 as shown in FIG. The camshaft 33 is rotatably supported by bearings (not shown) on both sides in the longitudinal direction. The camshaft 33 includes a driven sprocket 34 at the left end. An endless cam chain 35 is looped between the driven sprocket 34 and a drive sprocket (not shown) of the cylinder block 15.

  The drive sprocket of the cylinder block 15 is connected to a crankshaft (not shown). When the crankshaft is rotated by a reciprocating motion of a piston (not shown), the rotation output of the crankshaft is transmitted from the drive sprocket to the driven sprocket 34 via the cam chain 35. When the driven sprocket 34 rotates, the coaxial camshaft 33 rotates, and the intake side and exhaust side rocker arms (not shown) are driven. Accordingly, in the cylinder head 16, the side where the cam chain 35 is disposed is separated from the combustion chamber 36 as compared with the side where the rocker arm or the like is disposed, so that the temperature is relatively low. In the present embodiment, a pedestal 16a for mounting the throttle valve unit 20C is provided on the cam chain 35 side of the cylinder head 16 as shown in FIG.

  The bracket 248 for mounting the throttle valve unit 20C is disposed at the position of the base 16a of the cylinder head 16, and is screwed to the base 16a with the bolt 25 and the washer 26, whereby the gear box case 219 of the throttle valve unit 20C is fixed to the cylinder. It can be fixed to the head 16.

  Thus, in the throttle valve unit 20C of the present embodiment, the gear box case 219 has the throttle body 200 side connected to the throttle valve case 203 and the valve drive motor 220 side supported on the cam chain 35 side of the cylinder head 16. .

  According to the motorcycle 1 of the fourth embodiment described above, the following effects can be obtained in addition to the effects common to the first embodiment.

  Since the valve drive motor 220 is disposed so as to overlap the cylinder head 16 in a side view, the heavy valve drive motor 220 can be disposed below the vehicle body. For this reason, the center of gravity of the vehicle body can be lowered.

  Since the valve drive motor 220 is supported by the cylinder head 16, the heavy valve drive motor 220 can be firmly supported by the cylinder head 16. The valve drive motor 220 may be supported on the side surface of the cylinder 15. Even in such a configuration, the heavy valve driving motor 220 can be firmly supported by the cylinder 15.

  Since the valve drive motor 220 is supported on the side of the cam chain 35 having a relatively low temperature in the cylinder head 16, the valve drive motor 220 is less susceptible to the heat generated in the cylinder head 16.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with a various form.

  For example, in each embodiment, the example which fixed the gear box case which accommodates a valve drive motor and a gear box to each part of a vehicle body was shown. However, the method of fixing the valve drive motor to the vehicle body is not limited to this example. For example, the valve drive motor and the gear box may be housed in separate cases, and these cases may be coupled to fix the case housing the valve drive motor to each part of the vehicle body. When the valve drive motor is not housed in the case, the valve drive motor may be directly fixed to each part of the vehicle body using a fixing member such as a bracket or a band. Further, the valve drive motor is not limited to being fixed at one place, and may be fixed at a plurality of places.

  Further, the valve drive motor is not limited to the DC motor shown in the embodiment, and may be an AC motor. As the AC motor, for example, in addition to a general induction motor, a stepping motor in which the rotation angle of the rotation shaft is controlled by pulse input can be used. In other words, any type of motor may be used as the valve drive motor as long as it is a rotary motor.

  In each embodiment, the direction in which the second rotation shaft of the valve drive motor extends and the direction in which the first rotation shaft of the throttle body extends are orthogonal to each other. However, the second rotating shaft of the valve drive motor and the first rotating shaft of the throttle body do not necessarily have to be strictly orthogonal. That is, the second rotating shaft and the first rotating shaft may be provided so as to be substantially orthogonal (intersect substantially 90 degrees).

  Moreover, the saddle riding type vehicle according to the present invention can be suitably applied to a small motorcycle in which an engine is attached to the lower part of a main frame extending rearward and downward from the head pipe as in the present embodiment. However, the application of the present invention is not limited to this. For example, the saddle riding type vehicle according to the present invention may be applied to a scooter type vehicle having a low-floor footrest, a three-wheeled vehicle, or a four-wheeled vehicle. That is, the saddle riding type vehicle includes all the vehicles that ride across the vehicle body.

1 Motorcycle (saddle-ride type vehicle)
3 Main frame 13 Engine 16 Cylinder head 17 Air cleaner 19 Intake pipe 20 Throttle valve unit 22 Intake pipe 27 Air cleaner case 28 Case cover 29 Cleaner element 31 Front cover 200 Throttle valve 203 Throttle valve case 210 Gear box 219 Gear box case 220 Valve drive motor

Claims (13)

A head pipe that rotatably supports the steering device;
A main frame consisting of a single frame extending rearward and downward from the head pipe;
An engine that has a crankcase, a cylinder, and a cylinder head, the crankcase is supported below the main frame, and the cylinder and the cylinder head protrude forward from the crankcase;
An intake pipe extending from the upper part of the cylinder head of the engine toward the front upper side, and arranged so as to overlap the main frame in a top view;
A throttle valve that is arranged in the middle of the intake pipe and adjusts the amount of air supplied to the engine, the throttle valve being rotatably supported by a first rotating shaft extending in the vehicle width direction;
In a saddle-ride type vehicle comprising: a valve drive motor that drives the throttle valve in response to an input from an operator operated by an occupant;
The second rotating shaft, which is the rotating shaft of the valve drive motor, is orthogonal to the one end side of the first rotating shaft of the throttle valve in the direction in which the second rotating shaft extends and the direction in which the first rotating shaft extends. A straddle-type vehicle provided as described above.   The straddle-type vehicle according to claim 1, wherein the valve drive motor is disposed above the first rotation shaft of the throttle valve.   The straddle-type vehicle according to claim 2, wherein the valve drive motor is disposed so as to overlap the main frame in a side view.   The straddle-type vehicle according to claim 3, wherein the valve drive motor is supported by the main frame. Provided on the upstream side of the intake pipe with an intake chamber communicating with the intake pipe;
The straddle-type vehicle according to claim 2, wherein the valve drive motor is disposed so as to overlap the intake chamber in a side view.   The straddle-type vehicle according to claim 5, wherein the valve drive motor is supported by the intake chamber. The intake chamber includes a recess on a side surface thereof,
The straddle-type vehicle according to claim 5 or 6, wherein the valve drive motor is disposed in the recess.   The straddle-type vehicle according to claim 7, wherein the intake chamber includes a rib that covers a portion of the valve drive motor projecting outward from the recess from the front. The intake pipe has an intake pipe located downstream of the throttle valve;
The straddle-type vehicle according to claim 1, wherein the valve drive motor is disposed so as to overlap the intake pipe in a side view.   The straddle-type vehicle according to claim 9, wherein the valve drive motor is supported by the intake pipe.   The straddle-type vehicle according to claim 1, wherein the valve drive motor is disposed so as to overlap the cylinder head in a side view.   The straddle-type vehicle according to claim 11, wherein the valve drive motor is supported by the cylinder head.   The straddle-type vehicle according to claim 11, wherein the valve drive motor is supported on the cam chain side of the cylinder head.

Images