JP5072328B2 - Motorcycle - Google Patents

Description

  In the present invention, an intake system having a fuel injection valve and extending rearward from the cylinder head is connected to an upper side wall of an engine cylinder head that is supported so as to be swingable on a vehicle body frame by tilting a cylinder axis forward. A storage box that can store a helmet in a posture with its opening facing downward relates to a motorcycle fixed to a vehicle body frame above the intake system.

When the engine in which the fuel injection valve is provided in the intake system is a motorcycle mounted on the vehicle body frame below the storage box, there is a problem that the fuel injection valve easily interferes with the bottom wall of the storage box. Therefore, in the motorcycle disclosed in Patent Document 1, an escape portion is formed on the bottom wall of the storage box to avoid interference with the intake system, and the helmet is stored in the storage box at a position shifted from the escape portion. Like to do.
WO2004 / 038213

  However, in the one disclosed in Patent Document 1, the storage capacity of the storage box is greatly reduced.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a motorcycle capable of suppressing a decrease in storage capacity of a storage box while avoiding interference with an intake system of the storage box. To do.

In order to achieve the above-mentioned object, the invention according to claim 1 is directed to the upper side wall of the cylinder head of the engine that is pivotably supported on the vehicle body frame with the cylinder axis inclined forward and extends rearward from the cylinder head. In a motorcycle in which a storage box capable of storing a helmet in a posture with its opening facing downward is fixed to a vehicle body frame above the intake system, the intake system includes the cylinder head An intake pipe standing upright and bent rearward from the upper side wall, a throttle body having a downstream end connected to the upstream end of the intake pipe and extending rearward, and attached to the upper part of the intake pipe and above the intake pipe A fuel injection valve that rises, and a protrusion that projects into an opening of the helmet stored in the storage box is formed on the bottom wall of the storage box. The throttle body is disposed so as to form a recessed portion that is located directly above the intake system and opens downward at the portion where the throttle body is disposed, and the projecting portion is disposed in front of the fuel injection valve and is raised rearward. A front inclined portion that is inclined to the top, a top portion that is continuous with the upper end of the front inclined portion and extends rearward, and a rear inclined portion that is continuous with the rear end of the top portion and is inclined rearwardly, The inclined portion is formed so that the gradient with respect to the bottom wall is gentler than that of the front inclined portion, and the lower end of the rear inclined portion is located behind the throttle body and is located below the recess. A wall portion for covering the fuel injection valve from the front is provided integrally with the intake pipe, and a mounting seat provided on the intake pipe for attaching the fuel injection valve to the intake pipe is joined to the cylinder head. The intake pipe Characterized in that it is formed parallel to the flat joint surface formed on the downstream end.

In the invention according to claim 2, an intake system extending rearward from the cylinder head is connected to an upper side wall of the cylinder head of the engine that is supported so as to be swingable on the body frame by tilting the cylinder axis forward. In a motorcycle in which a storage box capable of storing a helmet with an opening facing downward is fixed to a vehicle body frame above the intake system, the intake system stands up from an upper side wall of the cylinder head and An intake pipe bent rearward, a throttle body having a downstream end connected to an upstream end of the intake pipe and extending rearward, and a fuel injection valve attached to an upper portion of the intake pipe and rising above the intake pipe The bottom wall of the storage box has a protrusion that enters the opening of the helmet stored in the storage box, and the fuel injection valve and the throttle body The projecting portion is disposed so as to form a recessed portion that is located directly above the intake system and opens downward in the disposed portion, and the projecting portion is disposed in front of the fuel injection valve and is inclined forward and rearward. An inclined portion, a top portion that is continuous with the upper end of the front inclined portion and extends rearward, and a rear inclined portion that is continuous with the rear end of the top portion and inclined rearwardly downward, and the rear inclined portion is The slope with respect to the bottom wall is formed to be gentler than the front inclined portion, and the lower end of the rear inclined portion is located behind the throttle body, and the fuel injection is performed at a portion located below the recess. A wall portion that covers the valve from the front is provided integrally with the intake pipe, and a holding member that fits the top portion of the fuel injection valve and clamps the fuel injection valve between the intake pipe and the wall portion it characterized in that it is fastened to.

Further, in the invention according to claim 3, an intake system extending rearward from the cylinder head is connected to an upper side wall of the cylinder head of the engine that is supported so as to be swingable to the vehicle body frame by tilting the cylinder axis forward. In a motorcycle in which a storage box capable of storing a helmet with an opening facing downward is fixed to a vehicle body frame above the intake system, the intake system stands up from an upper side wall of the cylinder head and An intake pipe bent rearward, a throttle body having a downstream end connected to an upstream end of the intake pipe and extending rearward, and a fuel injection valve attached to an upper portion of the intake pipe and rising above the intake pipe The bottom wall of the storage box has a protrusion that enters the opening of the helmet stored in the storage box, and the fuel injection valve and the throttle body The projecting portion is disposed so as to form a recessed portion that is located directly above the intake system and opens downward in the disposed portion, and the projecting portion is disposed in front of the fuel injection valve and is inclined forward and rearward. An inclined portion, a top portion that is continuous with the upper end of the front inclined portion and extends rearward, and a rear inclined portion that is continuous with the rear end of the top portion and inclined rearwardly downward, and the rear inclined portion is The slope with respect to the bottom wall is formed to be gentler than the front inclined portion, and the lower end of the rear inclined portion is located rearward of the throttle body, and the fuel injection valve has a coupler portion above it. And the coupler portion is attached to the intake pipe so as to enter the recess .

Further, in the invention according to claim 4, an intake system extending backward from the cylinder head is connected to an upper side wall of the cylinder head of the engine that is supported so as to be swingable on the vehicle body frame by tilting the cylinder axis forward. In a motorcycle in which a storage box capable of storing a helmet with an opening facing downward is fixed to a vehicle body frame above the intake system, the intake system stands up from an upper side wall of the cylinder head and An intake pipe bent rearward, a throttle body having a downstream end connected to an upstream end of the intake pipe and extending substantially horizontally rearward, and a fuel injection valve attached to an upper part of the intake pipe and rising above the intake pipe And a holding member that engages with an upper portion of the fuel injection valve and clamps the fuel injection valve with the intake pipe is fastened to the intake pipe with a bolt, On the bottom wall of the cylinder, a protrusion that enters the opening of the helmet stored in the storage box is directly above the intake system at a portion where the intake pipe, the fuel injection valve, and the throttle body are disposed. The projection is provided so as to form a recessed portion that is open and opens downward, and the projection is disposed in front of the fuel injection valve and is inclined forward and inclined at the upper end of the front inclined portion. A top part that is continuous and extends rearward, and a rear side slope part that is continuous with the rear end of the top part and is inclined rearwardly, and the rear side slope part is inclined with respect to the bottom wall rather than the front side slope part Is formed so that the front and rear lengths are longer than that of the front inclined portion, and the lower end of the rear inclined portion is positioned rearward of the throttle body, and the concave portion is a vehicle in plan view. Longer in the front-rear direction than in the width direction Made which have, the intake pipe inside the opening of the recess in plan view, the fuel injection valve and the throttle body is being arranged.

According to a fifth aspect of the invention, in addition to the configuration of the second aspect of the invention, a circle in which the front side of at least a portion of the intake pipe to which the fuel injection valve is attached bulges obliquely upward and forward in a side view. It is characterized by being formed in an arc shape.

According to a sixth aspect of the invention, in addition to the structure of the first , second, or fourth aspect of the invention, the fuel injection valve is attached to the intake pipe so that an upper portion thereof enters the recess. It is characterized by being able to.

The invention of claim 7, wherein, in addition to the configuration of the invention according to any one of claims 1 to 6, the pivot provided the engine down to a lower portion of the engine so as to swingably supported on the body frame The intake pipe is arranged on a vertical line passing through the center.

  Furthermore, in the invention according to claim 8, in addition to the configuration of the invention according to any one of claims 1 to 7, the intake system includes a throttle body, and the throttle body and the fuel injection valve are arranged. The front and rear lengths of the protrusions located immediately above the intake system are set according to the front and rear lengths of the opening of the helmet.

  Furthermore, the invention according to claim 9 is characterized in that, in addition to the configuration of the invention according to any one of claims 1 to 8, the top portion of the protrusion is inclined backward.

Further claim 10 the described invention, in addition to the configuration of the invention according to any one of claims 1 to 9, you wherein helmet is accommodated in backward to the storage box.

Furthermore, in addition to the structure of the invention of claim 4 , the invention of claim 11 is a vehicle width direction between the inner surface of one side of the recess and the holding member in the vehicle width direction in plan view. intervals, of the recess, characterized by longer than the vehicle width direction distance between the holding member and the inner surface of the other side in the vehicle width direction.

According to the present invention, the intake system is connected to the upper side wall of the cylinder head of the engine that is pivotally supported on the body frame with the cylinder axis tilted forward, and the helmet is stored with the opening facing downward. The storage box is a motorcycle fixed to the vehicle body frame above the intake system, and the intake system stands upright from the upper side wall of the cylinder head and is bent backward, and at the upstream end of the intake pipe A throttle body that is connected to the downstream end and extends rearward, and a fuel injection valve that is attached to the upper portion of the intake pipe and rises above the intake pipe, and enters the opening of the helmet stored in the storage box. A protrusion is provided on the bottom wall of the storage box, and the protrusion is a portion where the fuel injection valve and the throttle body are arranged and is located directly above the intake system and opened downward. Because it forms a dead space in the stored in the storage box helmet can be a relief portion for avoiding mutual interference of the fuel injection valve and the storage box. Therefore, a substantial capacity reduction of the storage box can be suppressed while avoiding interference with the fuel injection valve.

In particular , according to each of the first and second aspects of the present invention, the wall portion that protects the fuel injection valve from the front can be provided in the intake pipe while avoiding interference with the storage box. It is possible to protect the fuel injection valve by preventing foreign matter from contacting the fuel injection valve when the pipe is transported or assembled to the cylinder head.

In particular , according to the first aspect of the present invention, the mounting seat surface of the fuel injection valve is formed in the intake pipe in parallel with the joint surface of the intake pipe to the cylinder head, so that machining of the mounting seat surface is facilitated. This can contribute to reducing the manufacturing cost of the intake pipe.

Further, in particular , according to the invention of claim 2 , since the holding member that clamps the fuel injection valve between the intake pipe and the intake pipe is fastened to the wall portion of the intake pipe, the wall portion protects the fuel injection valve from the front, By using the wall portion to fix the fuel injection valve to the intake pipe, the intake pipe can be made compact.

  According to the fifth aspect of the present invention, the front of the intake pipe at least from the portion to which the fuel injection valve is attached has an arcuate shape that bulges obliquely upward and forward in a side view. In order to fasten the holding member held between the pipe and the pipe, the height of the wall part integrally provided in the intake pipe in front of the fuel injection valve is set, and the wall part for fastening the holding member is arranged behind the fuel injection valve. Compared with the case where it arranges, it can be made low.

  According to the invention described in claim 6, it is possible to obtain a layout in which the height of the storage box is lowered and the height of the passenger seat is kept as low as possible.

  According to the seventh aspect of the present invention, since the amount of displacement of the fuel injection valve in the vertical direction can be reduced by setting the swing direction of the intake pipe to which the fuel injection valve is mounted to be substantially the front-rear direction, the capacity of the storage box is reduced. Can be suppressed.

  According to the eighth aspect of the present invention, the front and rear lengths of the protrusions that are provided on the bottom wall of the storage box and are directly above the intake system in the portion where the throttle body and the fuel injection valve are disposed By aligning with the front and rear length, the protrusion can be made large as long as it does not interfere with the storage of the helmet, avoiding interference between the bottom wall of the storage box and the fuel injection valve and throttle body However, a substantial capacity reduction of the storage box can be suppressed.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a side view of a scooter type motorcycle, FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. 1, and FIG. FIG. 4 is a cutaway side view with a part cut away when viewed from the direction of arrow -3, FIG. 4 is an enlarged view of the main part of FIG. 3, and FIG.

  First, in FIG. 1, a scooter type motorcycle body frame 15 includes a main frame pipe 17 having a head pipe 16 fixed to a front end thereof, and a cross pipe 18 fixed to the rear end of the main frame pipe 17 at a right angle. , And a pair of left and right rear frame pipes 19 with front ends connected to both ends of the cross pipe 18, respectively.

  The main frame pipe 17 is formed by integrally connecting a down frame portion 17a inclined downward from the head pipe 16 and a lower frame portion 17b extending rearward substantially horizontally from the rear end of the down frame portion 17a. The cross pipe 18 extends in the left-right direction of the vehicle body frame 15, and the axial center portion of the cross pipe 18 is fixed to the rear end portion of the main frame pipe 17 at a right angle.

  A front fork 20 straddling the front wheel WF is supported on the head pipe 16 so as to be steerable, and a steering handle 21 is connected to an upper end of the front fork 20.

  At the front of both rear frame pipes 19 in the body frame 15, a unit swing type comprising an engine E disposed on the front side of the rear wheel WR and a transmission M disposed on the left side of the rear wheel WR. The power unit P is supported so as to be able to swing up and down via the link 22 so that the power unit P can swing up and down, and the rear wheel WR is pivotally supported at the rear portion of the power unit P.

  2 and 3, the engine E, which is a single-cylinder air-cooled four-cycle engine, includes a crankcase 23 formed by joining left and right crankcase halves 23L and 23R divided into left and right parts, and the crankcase 23. A cylinder block 24 to be coupled, a cylinder head 25 coupled to the cylinder block 24, and a head cover 26 coupled to the cylinder head 25 are provided on the cylinder block 24 with a forwardly inclined cylinder axis C. A piston 28 is slidably fitted to a cylinder bore 27 to be slid. A crankshaft 29 extending in the width direction of the vehicle body frame 15 is rotatably supported on the crankcase 23, and the piston 28 is connected to the crankshaft 29 via a connecting rod 30 and a crankpin 31.

  A pivot 36 for pivotally supporting the power unit P on the vehicle body frame 15 via the link 22 is provided below the crankcase 23 in the engine E.

  The transmission M includes a V-belt type continuously variable transmission 32 and a reduction gear train 34 that decelerates the output of the continuously variable transmission 32 and transmits it to the axle 33 of the rear wheel WR. And is housed in a transmission case 35 that extends to the left side of the rear wheel WR.

  The transmission case 35 is coupled to an inner case 38 that is integrated with the left crankcase half 23L of the crankcase 23 and extends rearward, a cover 39 that covers the inner case 38 from the outside, and a rear portion of the inner case 38. The transmission chamber 41 is formed between the inner case 38 and the cover 39 and accommodates the continuously variable transmission 32. The gear chamber 42 accommodates the reduction gear train 34 between the inner case 38 and the gear case 40. Is formed.

  The continuously variable transmission 32 has a drive pulley 43 attached to the end of the crankshaft 29 that enters the transmission chamber 41 from the crankcase 23, an inner case 38 and a gear case having an axis parallel to the crankshaft 29. The driven pulley 45 is mounted on an output shaft 44 that is rotatably supported by 40 and an endless V-belt 46 that transmits power from the drive pulley 43 to the driven pulley 45.

  The drive pulley 43 includes a fixed pulley half 47 fixed to the crankshaft 29 and a movable pulley half 48 that can be moved toward and away from the fixed pulley half 47. It is driven in the axial direction by a centrifugal force acting on a weight 50 arranged between the ramp plate 49 fixed to 29 and the movable pulley half 48.

  The driven pulley 45 is slidably fitted to the inner cylinder 51 that allows relative rotation and coaxially surrounds the output shaft 44, and allows relative rotation around the axis and relative movement in the axial direction. An outer cylinder 52, a fixed pulley half 53 fixed to the inner cylinder 51, a movable pulley half 54 fixed to the outer cylinder 52 opposite the fixed pulley half 53, the movable pulley half 54, and A torque cam mechanism 55 provided between the inner cylinder 51 and the outer cylinder 52 so as to apply an axial component force between the pulley halves 53 and 54 according to the relative rotational phase difference between the fixed pulley halves 53; A coil spring 56 that elastically biases the movable pulley half 54 toward the fixed pulley half 53 is provided, and the V belt 46 is wound between the fixed pulley half 53 and the movable pulley half 54.

  Between the inner cylinder 51 of the driven pulley 45 and the output shaft 44, there is provided a centrifugal clutch 57 that is in a power transmission state when the engine speed exceeds the set speed, and constitutes a part of the centrifugal clutch 57. Thus, a coil spring 56 that surrounds the outer cylinder 52 is contracted between the drive plate 58 that is coaxially coupled to the inner cylinder 51 in a relatively non-rotatable manner and the movable pulley half 54.

  Thus, the distance between the fixed pulley half 53 and the movable pulley half 54 in the driven pulley 45 is such that the axial force generated by the torque cam mechanism 55, the axial elastic force generated by the coil spring 56, and the fixed pulley half. By determining the balance with the force from the V-belt 46 acting in the direction to leave the space between the body 53 and the movable pulley half 54, the movable pulley half 48 is brought close to the fixed pulley half 47 in the drive pulley 43. When the winding radius of the V belt 46 around the drive pulley 43 increases, the winding radius of the V belt 46 around the driven pulley 45 decreases.

  The axle 33 of the rear wheel WR is rotatably supported by an inner case 38 and a gear case 40, and a reduction gear train 34 provided between the output shaft 44 and the axle 33 is accommodated in the gear chamber 42.

  In FIG. 1 again, a rear cushion unit 59 is provided between the rear portion of the transmission case 35 in the power unit P and the left rear frame pipe 19 of the pair of left and right rear frame pipes 19. An exhaust pipe 60 that guides exhaust gas from the lower part of the cylinder head 25 in the engine E extends from the engine E to the right side of the rear wheel WR. The exhaust pipe 60 is disposed on the right side of the rear wheel WR. Connected to the exhaust muffler 61.

  Referring to FIG. 3, an intake system 63 having a fuel injection valve 62 and extending rearward from the cylinder head 25 is connected to the upper side wall of the cylinder head 25 in the engine E. 63, an intake pipe 64 that is joined to the cylinder head 25 separately from the cylinder head 25; the fuel injection valve 62 that is attached to the intake pipe 64; and an upstream end at the upstream end of the intake pipe 64 Is connected to the upstream end of the throttle body 65, and an air cleaner 66 is arranged on the left side of the rear wheel WR. The air cleaner 66 is supported by a transmission case 35 below the air cleaner 66. . The intake pipe 64 is disposed on a vertical line VL passing through the center of a pivot 36 provided at the lower portion of the crankcase 23 in the engine E so as to swingably support the engine E on the vehicle body frame 15. .

  In FIG. 4, the intake pipe 64 is formed such that at least a side view on the front side with respect to a portion to which the fuel injection valve 62 is attached has an arc shape that bulges obliquely upward and forward. In the embodiment, the entire intake pipe 64 is formed so as to have a side view in an arc shape that swells upward and obliquely upward. A flat joint surface 68 is formed at the downstream end of the intake pipe 64 to be joined to the upper side wall of the cylinder head 25 via an insulator 67.

  The fuel injection valve 62 having a coupler portion 62a projecting upward at the rear portion injects fuel toward an intake port 69 provided in the cylinder head 25 so as to communicate with the intake pipe 64. The front end side of the fuel injection valve 62 is inserted into the mounting hole 70 provided in the intake pipe 64. In addition, an annular contact step portion 71 facing outward is formed at the axially intermediate portion of the attachment hole 70, and the fuel injection valve 62 is in contact with the contact step portion 71. 70 is inserted.

  On the other hand, the intake pipe 64 is integrally provided with a wall portion 64a that covers the fuel injection valve 62 inserted into the mounting hole 70 from the front, and a mounting seat surface 72 provided at the upper end of the wall portion 64a. In addition, a plurality of holding members 73 that fit into the rear portion of the fuel injection valve 62 except for the coupler portion 62a and sandwich the fuel injection valve 62 with the contact step portion 71 of the intake pipe 64 are provided, for example. Fastened with a pair of bolts 74. Moreover, the mounting seat surface 72 is formed in parallel with a flat joint surface 68 formed at the downstream end of the intake pipe 64 so as to join the intake pipe 64 to the cylinder head 25, and the annular stepped portion 71 of the mounting hole 70. Is also formed flat in parallel with the joint surface 68.

  A storage box 79 is supported between the front portions of the rear frame pipes 19 in the body frame 15 so as to be positioned above the intake system 63, and an occupant seat 80 covering the storage box 79 from above. Is supported on the upper front side of the storage box 79 so that it can be opened and closed.

  The storage box 79 can store a helmet 77 in which an interior pad 77b is stuck in a shell 77a with an opening 78 facing downward.

  Referring also to FIG. 5, a protrusion 81 that protrudes into an opening 78 of the helmet 77 housed in the storage box 79 is formed on the bottom wall 79 a of the storage box 79. The throttle body 65 is provided so as to form a concave portion 82 that is located directly above the intake system 63 and opens downward at a portion where the throttle body 65 is disposed. Moreover, the fuel injection valve 62 is attached to the intake pipe 64 so that the upper coupler portion 62a enters the recess 82.

  Thus, as shown in FIGS. 3 and 4, the projection 81 is arranged in front of the fuel injection valve 62 and is inclined to the rear inclined portion 81f and the upper end of the front inclined portion 81f. It has a top 81m that extends rearward, and a rear slope 81r that is continuous with the rear end of the top 81m and slopes rearwardly. The rear slope 81r is closer to the storage box 79 than the front slope 81f. The slope with respect to the bottom wall 79 a is formed to be gentle, and the lower end of the rear inclined portion 81 r is located behind the throttle body 65. Further, the front-rear length of the front inclined portion 81f is shorter than the front-rear length of the rear inclined portion 81r.

  In addition, the front and rear length of the projection 81 positioned directly above the intake system 63 at the portion where the throttle body 65 and the fuel injection valve 62 are arranged so as to substantially match the front and rear length of the opening 78 of the helmet 77. Is set.

  Next, the operation of this embodiment will be described. An intake system 63 having a fuel injection valve 62 is connected to the upper side wall of the cylinder head 25 of the engine E that is swingably supported by the vehicle body frame 15, and the helmet 77 is attached thereto. A storage box 79 that can be stored with the opening 78 facing downward is fixed to the vehicle body frame 15 above the intake system 63, and is stored in the storage box 79 on the bottom wall 79 a of the storage box 79. The projecting portion 81 that projects into the opening 78 of the helmet 77 is formed so as to form a recessed portion 82 that is located directly above the intake system 63 and opens downward at the portion where the fuel injection valve 62 is disposed. Has been.

  Therefore, the dead space in the helmet 77 stored in the storage box 79 can be used as an escape portion for avoiding interference between the fuel injection valve 62 and the storage box 79, and storage is performed while avoiding interference with the fuel injection valve 62. A substantial decrease in the capacity of the box 79 can be suppressed.

  The intake system 63 includes an intake pipe 64 joined to the cylinder head 25, and a fuel injection valve 62 attached to the intake pipe 64. The fuel injection valve 62 is disposed below the recess 81. Since the wall 64a that covers from the front is integrally provided in the intake pipe 64, the wall 64a that protects the fuel injection valve 62 from the front can be provided in the intake pipe 64 while avoiding interference with the storage box 79. When the intake pipe 64 to which the fuel injection valve 62 is attached is transported or assembled to the cylinder head 25, the fuel injection valve 62 can be protected by preventing contact of foreign matter with the fuel injection valve 62.

  Further, a mounting seat surface 72 provided on the wall portion 64 a of the intake pipe 64 for attaching the fuel injection valve 62 to the intake pipe 64 is formed at a flat mounting seat at the downstream end of the intake pipe 64 so as to be joined to the cylinder head 25. Since it is formed in parallel with the surface 68, machining of the mounting seat surface 72 is facilitated, which can contribute to a reduction in manufacturing cost of the intake pipe 64.

  Further, the holding member 73 that fits the top of the fuel injection valve 62 and clamps the fuel injection valve 62 with the intake pipe 64 is fastened to the mounting seat surface 72 of the wall portion 64a. The intake pipe 64 can be made compact by protecting the fuel injection valve 62 from the front by 64a and fixing the fuel injection valve 62 to the intake pipe 64 using the wall 64a. Moreover, in this embodiment, the annular step portion 71 provided in the intake pipe 64 so as to sandwich the fuel injection valve 62 with the holding member 73 is also formed flat in parallel with the joint surface 68. Therefore, machining of the annular step portion 71 is easy, and the manufacturing cost of the intake pipe 64 can be further reduced.

  Further, at least a portion of the intake pipe 64 that is forward of at least the portion where the fuel injection valve 62 is attached, in this embodiment, the entire intake pipe 64 is formed in an arc shape that bulges obliquely upward and forward in a side view. Therefore, in order to fasten the holding member that clamps the fuel injection valve with the intake pipe, the height of the wall part integrally provided in the intake pipe in front of the fuel injection valve is set to the wall for fastening the holding member. Compared with the case where a part is arrange | positioned behind a fuel injection valve, it can be made low.

  Further, since the fuel injection valve 62 is attached to the intake pipe 64 so that the upper portion of the fuel injection valve 62 projects into the recess 82 of the storage box 79, the height of the passenger box 80 is reduced by reducing the height of the storage box 79. Can be made as low as possible.

  Further, since the intake pipe 64 is disposed on a vertical line VL passing through the center of the pivot 36 provided at the lower part of the crankcase 23 in the engine E so that the engine E can be swingably supported on the vehicle body frame 15, the fuel Since the amount of vertical displacement of the fuel injection valve 62 can be reduced by setting the swing direction of the intake pipe 64 to which the injection valve 62 is attached to be approximately the front-rear direction, a decrease in the capacity of the storage box 79 can be suppressed.

  Further, the front-rear length of the protrusion 81 provided on the bottom wall 79a of the storage box 79 so as to be positioned immediately above the intake system 63 at a portion where the throttle body 65 and the fuel injection valve 62 provided in the intake system 63 are disposed. Since the length is set in accordance with the longitudinal length of the opening 78 of the helmet 77, the protrusion 81 can be formed large in a range that does not hinder the storage of the helmet 77, and the bottom of the storage box 79 While avoiding interference between the wall 79a, the fuel injection valve 62, and the throttle body 65, a substantial capacity reduction of the storage box 79 can be suppressed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

  For example, in the above embodiment, the case where the intake pipe 64 constituting a part of the intake system 63 is separate from the cylinder head 25 has been described, but the fuel injection valve 62 is attached to the intake pipe integral with the cylinder head. The present invention can also be applied to such cases.

1 is a side view of a scooter type motorcycle. FIG. FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. FIG. 3 is a cutaway side view with a part cut away when viewed from the direction of arrows 3-3 in FIG. 2. It is a principal part enlarged view of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG.

15 ... Body frame 25 ... Cylinder head 36 ... Pivot 62 ... Fuel injection valve 62a ... Coupler 63 ... Intake system 64 ... Intake pipe 64a ... Wall 65 ... Throttle body 68 ... joint surface 72 ... mounting seat surface 73 ... holding member 77 ... helmet 78 ... opening 79 ... storage box 79a ... bottom wall 81 of storage box ... Projection 81f ··· Front side inclined portion 81m · · Top portion 81r · · Rear side inclined portion 82 ··· Recessed portion ··· Cylinder axis E · · ·

Claims (11)

The cylinder axis (C) is tilted forward, and is extended rearward from the cylinder head (25) to the upper side wall of the cylinder head (25) of the engine (E) that is swingably supported on the vehicle body frame (15). A storage box (79) capable of storing the helmet (77) with the opening (78) facing downward is connected to the intake system (63), and the vehicle body frame (15 Motorcycle fixed to
The intake system (63) has an intake pipe (64) standing upright from the upper side wall of the cylinder head (25) and bent backward, and a downstream end is connected to the upstream end of the intake pipe (64) and the rear end is connected to the rear side. An extended throttle body (65), and a fuel injection valve (62) that is attached to an upper portion of the intake pipe (64) and rises above the intake pipe (64),
On the bottom wall (79a) of the storage box (79), a protrusion (81) that projects into the opening (78) of the helmet (77) stored in the storage box (79) has the fuel injection valve. (62) and at the portion where the throttle body (65) is disposed, it is provided so as to form a recess (82) that is located directly above the intake system (63) and opens downward,
The protrusion (81) is disposed in front of the fuel injection valve (62) and tilts rearwardly upward, and a top portion that continues to the upper end of the front inclined portion (81f) and extends rearward. (81m) and a rear inclined portion (81r) that is connected to the rear end of the top portion (81m) and inclined rearwardly downward,
The rear inclined portion (81r) is formed to have a gentler gradient with respect to the bottom wall (79a) than the front inclined portion (81f), and the lower end of the rear inclined portion (81r) is the throttle body (65). ) Behind ,
A wall portion (64a) that covers the fuel injection valve (62) from the front in a portion located below the recess (81) is provided integrally with the intake pipe (64),
An attachment seat surface (72) provided on the intake pipe (64) for attaching the fuel injection valve (62) to the intake pipe (64) is connected to the cylinder head (25). The motorcycle is formed in parallel with a flat joint surface (68) formed at the downstream end of the motorcycle. The cylinder axis (C) is tilted forward, and is extended rearward from the cylinder head (25) to the upper side wall of the cylinder head (25) of the engine (E) that is swingably supported on the vehicle body frame (15). A storage box (79) capable of storing the helmet (77) with the opening (78) facing downward is connected to the intake system (63), and the vehicle body frame (15 Motorcycle fixed to
The intake system (63) has an intake pipe (64) standing upright from the upper side wall of the cylinder head (25) and bent backward, and a downstream end is connected to the upstream end of the intake pipe (64) and the rear end is connected to the rear side. An extended throttle body (65), and a fuel injection valve (62) that is attached to an upper portion of the intake pipe (64) and rises above the intake pipe (64),
On the bottom wall (79a) of the storage box (79), a protrusion (81) that projects into the opening (78) of the helmet (77) stored in the storage box (79) has the fuel injection valve. (62) and at the portion where the throttle body (65) is disposed, it is provided so as to form a recess (82) that is located directly above the intake system (63) and opens downward,
The protrusion (81) is disposed in front of the fuel injection valve (62) and tilts rearwardly upward, and a top portion that continues to the upper end of the front inclined portion (81f) and extends rearward. (81m) and a rear inclined portion (81r) that is connected to the rear end of the top portion (81m) and inclined rearwardly downward,
The rear inclined portion (81r) is formed to have a gentler gradient with respect to the bottom wall (79a) than the front inclined portion (81f), and the lower end of the rear inclined portion (81r) is the throttle body (65). ) Behind,
A wall portion (64a) that covers the fuel injection valve (62) from the front in a portion located below the recess (81) is provided integrally with the intake pipe (64),
A holding member (73) that fits into the top of the fuel injection valve (62) and clamps the fuel injection valve (62) between the intake pipe (64) is fastened to the wall (64a). automatic motorcycle characterized by that. The cylinder axis (C) is tilted forward, and is extended rearward from the cylinder head (25) to the upper side wall of the cylinder head (25) of the engine (E) that is swingably supported on the vehicle body frame (15). A storage box (79) capable of storing the helmet (77) with the opening (78) facing downward is connected to the intake system (63), and the vehicle body frame (15 Motorcycle fixed to
The intake system (63) has an intake pipe (64) standing upright from the upper side wall of the cylinder head (25) and bent backward, and a downstream end is connected to the upstream end of the intake pipe (64) and the rear end is connected to the rear side. An extended throttle body (65), and a fuel injection valve (62) that is attached to an upper portion of the intake pipe (64) and rises above the intake pipe (64),
On the bottom wall (79a) of the storage box (79), a protrusion (81) that projects into the opening (78) of the helmet (77) stored in the storage box (79) has the fuel injection valve. (62) and at the portion where the throttle body (65) is disposed, it is provided so as to form a recess (82) that is located directly above the intake system (63) and opens downward,
The protrusion (81) is disposed in front of the fuel injection valve (62) and tilts rearwardly upward, and a top portion that continues to the upper end of the front inclined portion (81f) and extends rearward. (81m) and a rear side inclined portion (81r) that is continuous with the rear end of the top portion (81m) and is inclined rearwardly downward,
The rear inclined portion (81r) is formed to have a gentler gradient with respect to the bottom wall (79a) than the front inclined portion (81f), and the lower end of the rear inclined portion (81r) is the throttle body (65). ) Behind,
The fuel injection valve (62) includes a coupler portion (62a) at the upper portion thereof, and is attached to the intake pipe (64) so that the coupler portion (62a) protrudes into the recess (82). automatic motorcycle you wherein a. The cylinder axis (C) is tilted forward, and is extended rearward from the cylinder head (25) to the upper side wall of the cylinder head (25) of the engine (E) that is swingably supported on the vehicle body frame (15). A storage box (79) capable of storing the helmet (77) with the opening (78) facing downward is connected to the intake system (63), and the vehicle body frame (15 Motorcycle fixed to
The intake system (63) has an intake pipe (64) standing upright from the upper side wall of the cylinder head (25) and bent backward, and a downstream end is connected to the upstream end of the intake pipe (64) and the rear end is connected to the rear side. A throttle body (65) that extends substantially horizontally, and a fuel injection valve (62) that is attached to the upper portion of the intake pipe (64) in front of the throttle body (65) and rises above the intake pipe (64). And a holding member (73) that engages with an upper portion of the fuel injection valve (62) and holds the fuel injection valve (62) between the intake pipe (64) and the intake pipe (64). Fastened with bolts (74),
On the bottom wall (79a) of the storage box (79), a protrusion (81) that projects into the opening (78) of the helmet (77) stored in the storage box (79) has the intake pipe ( 64), and a portion of the fuel injection valve (62) and the throttle body (65) is disposed directly above the intake system (63) to form a recess (82) that opens downward. Established,
The protrusion (81) is disposed in front of the fuel injection valve (62) and tilts rearwardly upward, and a top portion that continues to the upper end of the front inclined portion (81f) and extends rearward. (81m) and a rear inclined portion (81r) that is connected to the rear end of the top portion (81m) and inclined rearwardly downward,
The rear inclined portion (81r) is formed such that the gradient with respect to the bottom wall (79a) is gentler than the front inclined portion (81f) and the longitudinal length is longer than that of the front inclined portion (81f). And the lower end of the rear inclined portion (81r) is located behind the throttle body (65),
The recess (82) is formed longer in the front-rear direction than in the vehicle width direction in plan view, and the intake pipe (64) and the fuel injection valve (64) are formed inside the opening of the recess (82) in plan view. 62) and the throttle body (65) are arranged. The front side of at least a portion of the intake pipe (64) to which the fuel injection valve (62) is attached is formed in an arc shape that swells upward and obliquely upward in a side view. Item 2. The motorcycle according to item 2 . The motorcycle according to claim 1 , 2 or 4 , wherein the fuel injection valve (62) is attached to the intake pipe such that an upper portion thereof enters the recess (82). It centered on the vertical line (VL) passing through the pivot (36) provided at the lower portion of the engine (E) so as to swingably supported the engine (E) on the body frame (15), the intake pipe The motorcycle according to any one of claims 1 to 6, wherein (64) is arranged.   The motorcycle according to any one of claims 1 to 7, wherein a longitudinal length of the projection (81) is set in accordance with a longitudinal length of the opening (78) of the helmet (77).   The motorcycle according to any one of claims 1 to 8, wherein the top of the protrusion (81) is inclined rearwardly. The helmet (77) is an automatic two-wheeled vehicle according to claim 1, characterized in that it is housed in a rear-facing to said housing box (79). In plan view, the distance in the vehicle width direction between the inner surface of the concave portion (82) on one side in the vehicle width direction and the holding member (73) is the other side in the vehicle width direction of the concave portion (82). motorcycles vehicle according to claim 4, wherein longer than the vehicle width direction distance between the inner surface and the holding member (73).

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