JP6379387B2 - Internal combustion engine for saddle-ride type vehicles - Google Patents

Description

  The present invention relates to an engine disposed below a main frame in a vehicle body frame having a head pipe that supports the steering handle in a steerable manner and a main frame that is inclined rearwardly downward from the head pipe and extends rearward. A main body is mounted with a cylinder axis inclined forward, and a part of an intake passage connecting an air cleaner disposed between a cylinder head and a main frame constituting a part of the engine main body and an intake port of the cylinder head is provided. The present invention relates to a saddle-ride type vehicle internal combustion engine in which a fuel injection valve is attached to the front side of an intake passage forming member to be formed.

  An engine body with the cylinder axis inclined forward is mounted on a backbone-type body frame, and an air cleaner arranged between the main frame and the cylinder head of the body frame is connected to the intake of the cylinder head via the connecting tube, throttle body, and intake pipe. An internal combustion engine for a saddle-ride type vehicle connected to a port is known from Patent Document 1.

JP 2013-217338 A

  In the internal combustion engine disclosed in Patent Document 1, the fuel injection valve is attached to the throttle body, and the fuel injection direction of the fuel injection valve is directed to the intake port to suppress fuel adhesion to the inner surface of the intake pipe. ing. By the way, in a saddle-ride type vehicle such as a motorcycle in which an air cleaner is attached to a main frame extending downward from the head pipe, if an excessive load acts on the air cleaner from the front due to some event, for example, an excessive amount is applied to the front wheel. When a load is applied and the front wheels and the front fender press the front surface of the air cleaner, there is a concern that the air cleaner may move rearward from the normal mounting state on the vehicle body frame and interfere with the fuel injection valve. The response to such concerns is not specifically disclosed.

  The present invention has been made in view of such circumstances, and is configured such that a fuel injection valve is attached to an intake passage forming member, and even if the air cleaner receives an excessive load from the front due to some event, the fuel injection valve and An object of the present invention is to provide an internal combustion engine for a saddle-ride type vehicle that can avoid interference of an air cleaner.

In order to achieve the above object, the present invention provides a vehicle body frame having a head pipe that supports a steering handle in a steerable manner, and a main frame that tilts rearwardly downward from the head pipe and extends rearward. An engine main body disposed below the frame is mounted with a cylinder axis inclined forward, a cylinder head constituting a part of the engine main body, an air cleaner disposed between the main frames, an intake port of the cylinder head, In a saddle-ride type vehicle internal combustion engine in which a fuel injection valve is attached to the front side of an intake passage forming member that forms a part of an intake passage that connects the two, an attached portion provided in an upper portion of the air cleaner extends in the vehicle width direction. The lower edge of the air cleaner is fastened to one side in the vehicle width direction when viewed from the front of the vehicle. A virtual rotation which is formed so as to be inclined downward as it goes, and the lowermost portion of the lower edge portion of the air cleaner where the fuel injection valve is arranged in the vehicle width direction draws about the axis of the fastening member The first feature is that the fuel injection valve is disposed below the air cleaner so that the fuel injector is located outside the trajectory and has an upper end that is flush with a lower end of the air cleaner as viewed from the side of the vehicle. .

According to the present invention, in addition to the configuration of the first feature, a quick connector is provided at an end of the fuel hose for supplying fuel to the fuel injection valve on the fuel injection valve side, and the combustion is formed in the intake passage forming member. A second feature is that a detent rib that engages with the quick connector connected to the injection valve is provided integrally.

The present invention, in addition to the second feature, the fuel hose, the third being disposed inside the vehicle width direction outermost end of the engine body.

  According to the first feature of the present invention, the mounted portion at the upper portion of the air cleaner is fastened to the main frame by the fastening member having an axis extending in the vehicle width direction, and the fuel injection valve in the vehicle width direction of the lower edge portion of the air cleaner. Since the fuel injection valve is disposed outside the virtual rotation locus drawn at the bottom of the portion where the shaft is disposed around the axis of the fastening member, the fastening member is caused by an excessive load from the front due to some event by the air cleaner. Interference between the air cleaner and the fuel injection valve can be avoided even if it is rotated rearward with fulcrum as a fulcrum.

In addition, since the lower edge of the air cleaner is inclined so as to become a lower position toward the one side in the vehicle width direction when viewed from the front of the vehicle, the capacity of the lower portion of the air cleaner is minimized as much as possible in a portion that does not overlap the fuel injection valve when viewed from the front of the vehicle. Ki de be increased, and because the fuel injection valve to which the same height lower end and the upper portion of the air cleaner viewed from the side of the vehicle is disposed below the air cleaner, the air cleaner may receive excessive load from front by some event Thus, even if the fastening member is rotated backward with the fastening member as a fulcrum, interference between the air cleaner and the fuel injection valve can be avoided.

According to the second aspect of the present invention, the quick connector provided at the end of the fuel hose on the fuel injection valve side is provided with a non-rotating rib integrally formed with the intake passage forming member. Since it engages in the connection state to a valve, a fuel hose can be hold | maintained in a predetermined position, without causing the increase in a number of parts.

Furthermore, according to the third feature of the present invention, since the fuel hose is located inside the outermost end in the vehicle width direction of the engine body, contact and interference from the outside to the fuel hose can be suppressed.

1 is a left side view of a motorcycle. It is a principal part enlarged view of FIG. It is a vertical side view of the intake system of an internal combustion engine. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is the figure which looked at the air cleaner of the state which abbreviate | omitted the cleaner cover from the 5-5 line arrow direction of FIG. It is the perspective view which looked at the intake system of the internal combustion engine from the left front diagonally downward in the state where the air cleaner was omitted. FIG. 7 is a view taken in the direction of arrow 7 in FIG. 6. It is a top view which shows the relative position of a vehicle body frame, an engine main body, and a fuel hose. FIG. 3 is a side view corresponding to FIG. 2 of the first comparative example. It is a side view corresponding to FIG. 2 of the 2nd comparative example. It is sectional drawing corresponding to FIG. 3 of a modification. It is a figure corresponding to Drawing 7 of a modification.

  Embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, front and rear, top and bottom, and left and right refer to directions viewed from the occupant who rides the motorcycle.

  First, in FIG. 1, a body frame F of a motorcycle that is a saddle-ride type vehicle includes a head pipe 13 that pivotally supports a front fork 11 and a steering handle 12 that pivotally support a front wheel WF, and a head pipe 13 that A single main frame 14 inclined rearward and extending rearward, a pair of left and right pivot plates 15 connected to a rear end portion of the main frame 14 and extending downward, and a rear end of the main frame 14 And a pair of left and right seat rails 16 extending rearward from the portion, and configured as a backbone type.

  The rear wheel WR is rotatably supported at the rear end portion of the swing arm 18, and the front end portion of the swing arm 18 is supported by the pivot plate 15 via a support shaft 19 so as to be swingable. A rear cushion unit 20 is provided between the rear portion of the rail 16 and the rear portion of the swing arm 18.

  Referring also to FIG. 2, an engine main body 21 of an internal combustion engine E that is a single cylinder has a crankcase 23, a cylinder body 24, and a cylinder head 25 that support a crankshaft 22 that has an axis lined in the width direction of the motorcycle. Combined. The engine body 21 is mounted on the vehicle body frame F so that the cylinder axis C is inclined forward until it becomes substantially horizontal and is disposed below the main frame 14.

  The crankcase 23 accommodates a transmission (not shown) that transmits the rotational power of the crankshaft 22 while changing the rotational speed, and one end of the output shaft 26 of the transmission is connected to the crankcase. It protrudes outward from the crankcase 23 behind the shaft 22. In addition, an endless chain 29 is wound around a driving sprocket 27 fixed to the protruding end of the output shaft 26 and a driven sprocket 28 provided on the rear wheel WR.

  A front portion of the vehicle body frame F and a part of the internal combustion engine E are covered with a front cover 30, and a rear portion of the vehicle body frame F is covered with a body cover 31, and a riding seat 32 is provided on the body cover 31 so that it can be opened and closed. A fuel tank (not shown) covered from above with the riding seat 32 is accommodated in the front portion of the body cover 31.

  Referring also to FIG. 3, a piston 34 connected to the crankshaft 22 is slidably fitted into a cylinder bore 33 of the cylinder body 24, and a combustion chamber 35 that faces the top of the piston 34. Is formed between the cylinder body 24 and the cylinder head 25.

  The cylinder head 25 is provided with an intake port 36 for intake into the combustion chamber 35 so as to open to the upper side wall of the cylinder head 25, and an exhaust port 37 for exhausting from the combustion chamber 35. The cylinder head 25 is provided so as to open on the lower side wall.

  The cylinder head 25 is closed with an intake valve 38 for controlling intake air from the intake port 36 to the combustion chamber 35 and an exhaust valve 39 for controlling exhaust gas from the combustion chamber 35 to the exhaust port 37. A valve operating mechanism 40 that opens and closes the intake valve 38 and the exhaust valve 39 is accommodated in the cylinder head 25 while being urged by a spring in the direction.

  The valve mechanism 40 can rotate around an axis parallel to the crankshaft 22 and is rotatably supported by the cylinder head 25, and between the intake valve 38 and the camshaft 41. An intake valve rocker arm 42 provided, and an exhaust valve rocker arm 43 provided between the exhaust valve 39 and the camshaft 41 are provided.

  Rotational power from the crankshaft 22 is transmitted to the camshaft 41 via a timing transmission mechanism (not shown). The cylinder head 25 supports an intake valve side rocker shaft 44 and an exhaust valve side rocker shaft 45 that have axes parallel to the camshaft 41, and are swingably supported by the intake valve side rocker shaft 44. The intake valve rocker arm 42 swings according to the rotation of the camshaft 41 to open and close the intake valve 38 and is supported by the exhaust valve side rocker shaft 45 so as to be swingable. 43 swings according to the rotation of the camshaft 41 to open and close the exhaust valve 39.

  Moreover, the cylinder head 25 includes an intake valve side maintenance opening 46 for maintaining the end 38a of the intake valve 38 on the camshaft 41 side, and an end 39a of the exhaust valve 39 on the camshaft 41 side. And an exhaust valve side maintenance opening 47 for closing the intake valve side maintenance opening 47, and an exhaust valve side maintenance cover for closing the exhaust valve side maintenance opening 47. 49 is attached to the cylinder head 25 with a plurality of bolts 50 and 51 so that the cylinder 49 can be opened and closed independently.

  An upstream end portion of an exhaust pipe 52 connected to the exhaust port 37 is fastened to a lower side wall of the cylinder head 25, and the exhaust pipe 52 passes rearward of the engine body 21 as shown in FIG. And is connected to an exhaust muffler (not shown) disposed on the right side of the rear wheel WR.

  On the other hand, an air cleaner 54 is disposed between the cylinder head 25 and the main frame 14, and the air cleaner 54 is connected to the upstream end of the throttle body 56 via a connecting tube 55, and the downstream end of the throttle body 56. The portion is connected to the upper side wall of the cylinder head 25 via an intake pipe 57 connected to the intake port 36 of the cylinder head 25.

  As shown in FIGS. 2 and 3, the intake pipe 57 extends from the intake port 36 while being bent obliquely forward and upward in a side view of the vehicle, and the intake pipe 57 is integrated with the downstream end thereof. A flange portion 57a is provided with a plurality of bolts 59 to an intake pipe coupling surface 58 formed on the cylinder head 25 so as to face the outer end opening of the intake port 36.

  In addition, as shown in FIGS. 2 and 3, the intake pipe coupling surface 58 is formed in the cylinder head 25 so as to face obliquely upward in the side view of the vehicle, and the intake valve side maintenance cover 48. Is formed on the cylinder head 25 on the same plane PL as the intake pipe coupling surface 58.

  The connecting tube 55, the throttle body 56, and the intake pipe 57 form an intake passage 61 that connects the intake port 36 and the air cleaner 54, and adjusts the amount of air flowing through the intake passage 61. The throttle valve 62 is provided on the throttle body 56.

  4 and 5 together, the air cleaner 54 forms a purification chamber 69 between the bowl-shaped cleaner case 65 opened forward and the cleaner case 65 while holding the cleaner element 68. A partition plate 66 that closes the opening end of the cleaner case 65 and a plurality of screw members 71 (see FIG. 5) from the front to the cleaner case 65 so as to sandwich the outer peripheral portion of the partition plate 66 with the cleaner case 65. 2) and a cleaner cover 67 that forms an unpurified chamber 69 between the partition plate 66 and the cleaner cover 67.

  At the lower part of the partition plate 66, a protruding portion 66a that forms a bulging chamber 72 that communicates with the inside of the purification chamber 69 is integrally protruded so as to protrude toward the unpurified chamber 69 side.

  The upper portion of the air cleaner 54 is fastened to the main frame 14 with a fastening member having an axis extending in the vehicle width direction. In this embodiment, the air cleaner 54 is provided on the upper portion of the cleaner case 65 in the air cleaner 54. A pair of left and right attached portions 65a, 65a are bolts 74, 74 as a pair of left and right fastening members and nuts 75, 75 screwed to the bolts 74, 74 to a stay 73 fixed to the main frame 14. And concluded.

  Suction ports 76, 76 are provided on the left and right sides of the upper portion of the partition plate 66, and a pair of left and right suction pipes 77, 77 individually connected to the suction ports 76, 76 penetrate the cleaner case 65. And it is extended backward. Accordingly, outside air is sucked into the unpurified chamber 70 of the air cleaner 54 from the rear side of the air cleaner 54 through the suction pipes 77 and 77.

  The connecting tube 55 air-tightly penetrates the cleaner case 65 so that the downstream end 55a protrudes downward from the cleaner case 65 in the air cleaner 54, and the downstream end 55a of the connecting tube 55 is A band 78 is connected to the upstream end of the throttle body 56. That is, most of the connecting tube 55 is accommodated in the purification chamber 69 of the air cleaner 54, and the portion 55 b of the connecting tube 55 accommodated in the purification chamber 69 is the main frame 14. It is formed to be curved so as to form a U-shape that is opened rearwardly below.

  Referring to FIGS. 6 and 7 together, on the front side of the intake pipe 57 which is an intake passage forming member that forms a part of the intake passage 61 that connects the air cleaner 54 and the intake port 36 of the cylinder head 25. The fuel injection valve 63 is attached.

  Moreover, the lowermost part 54aa of the lower edge part 54a of the air cleaner 54 where the fuel injection valve 63 is arranged in the vehicle width direction is used to fasten the upper part of the air cleaner 54 to the stay 73 of the main frame 14. The fuel injection valve 63 is disposed outside the virtual rotation locus CT1 (see FIG. 3) drawn around the axis of the axis.

  Further, as shown in FIG. 5, the lower edge portion 54a of the air cleaner 54 is formed so as to be inclined so as to become a lower position toward one side in the vehicle width direction (to the left in this embodiment) when viewed from the front of the vehicle. As shown in FIG. 3, the fuel injection valve 63 is disposed below the air cleaner 54 with its upper end being flush with the lower end of the air cleaner 54 as viewed from the side of the vehicle. That is, a recess 78 is formed in the lower portion of the air cleaner 54 at the rear side of the cleaner case 65, and the throttle body 56 and a part of the intake pipe 57 are disposed so as to be accommodated in the recess 78. The injection valve 63 is arranged so that its upper end is flush with the lower end of the air cleaner 54 as viewed from the side of the vehicle.

  A part of the fuel injection valve 63 is inserted into a valve mounting hole 80 provided in the intake pipe 57, and the fuel injection valve 63 includes the intake pipe 57 and a cap 81 fastened to the intake pipe 57. Is retained.

  At the end of the fuel hose 82 that supplies fuel to the fuel injection valve 63 on the fuel injection valve 63 side, a quick connector 83 that is fitted and connected to the connection pipe 81a of the cap 81 is provided. The intake pipe 57 is integrally provided with a detent rib 57 b that engages with the quick connector 83 connected to the combustion injection valve 63.

  In addition, as shown in FIG. 8, the fuel hose 82 is disposed inside the outermost end in the vehicle width direction of the engine body 21. That is, in this embodiment, the inner side in the vehicle width direction is more inward than the virtual vertical plane VL1 that forms a part of the engine body 21 and passes through the outermost surface of the cover 84 that is coupled to the left side surface of the crankcase 23. The routing path of the fuel hose 82 is set so that there is a virtual vertical plane VL2 passing through the outer end of the fuel hose 82 in the vehicle width direction.

  Next, the operation of this embodiment will be described. An air cleaner 54 disposed between the cylinder head 25 and the main frame 14 of the vehicle body frame F is connected to the upstream end portion of the throttle body 56 via the connecting tube 55. The downstream end of the throttle body 56 is connected to the cylinder head 25 via an intake pipe 57 communicating with the intake port 36 of the cylinder head 25, and the intake pipe 57 is viewed from the side of the vehicle when viewed from the side of the vehicle. Therefore, it is possible to suppress the vertical length of the intake pipe 57 while extending the intake pipe length. By attaching the fuel injection valve 63 to the front side of the intake pipe 57, the fuel injection valve 63 and The distance between the intake ports 36 can be shortened to effectively suppress the fuel intake pipe from adhering.

  In addition, the cylinder head 25 is provided with an intake valve 38 and an exhaust valve 39 that open and close according to the rotation of a camshaft 41 that is rotatably supported by the cylinder head 25, and the cam of the intake valve 38. An intake valve side maintenance opening 46 for maintaining the end portion 38a on the shaft 41 side and an exhaust valve side maintenance opening portion 47 for maintaining the end portion 39a on the camshaft 41 side of the exhaust valve 39 are provided. An intake valve side maintenance cover 48 that closes the intake valve side maintenance opening 46 and an exhaust valve side maintenance cover 49 that closes the exhaust valve side maintenance opening 47 are attached to the cylinder head 25 so that they can be opened and closed independently of each other. Therefore, by making the cylinder head 25 a so-called integrated head, Even if the arrangement position of the air cleaner 54 is lowered due to a change in the rearward descending angle of the in-frame 14, the arrangement of the throttle body 56 and the intake pipe 57 and the attachment of the fuel injection valve 63 to the intake pipe 57 are compatible. In addition, maintainability of valve operating parts such as the camshaft 41, the intake valve side rocker arm 42, and the exhaust valve side rocker arm 43 can be ensured.

  Here, referring to FIG. 9, the first comparative example is compared with the first comparative example in which a shallow dish-shaped head cover 86A is coupled to the cylinder head 25A to form a part of the engine body 21A. Then, the coupling surface 87A of the cylinder head 25A and the head cover 86A is close to the lower portion of the air cleaner 54, and it becomes difficult to ensure a sufficient clearance 88 between the air cleaner 54 and the engine body 21A. And the attachment of the fuel injection valve 63 to the intake pipe 57 are difficult to achieve, and the maintainability of the valve operating system parts also deteriorates. On the other hand, according to the present invention, as shown in FIGS. 2 and 3, a sufficient clearance 89 can be secured between the air cleaner 54 and the engine body 21. Further, referring to FIG. 10, in comparison with the second comparative example in which a deep saddle-shaped head cover 86B is coupled to the cylinder head 25B to form a part of the engine body 21BA, this second comparative example The coupling surface 87B of the cylinder head 25B and the head cover 86B is close to the intake port 36 of the cylinder head 25B, and the degree of freedom in arrangement of the intake port 36 is reduced.

  Further, since the lower portion of the air cleaner 54 is arranged so as to overlap at least a part of the throttle body 56 when viewed from the front of the vehicle, the arrangement of the throttle body 56 and the intake pipe 57 and the attachment of the fuel injection valve 63 to the intake pipe 57 are arranged. And the capacity of the air cleaner 54 can be secured.

  The cylinder head 25 has an intake pipe coupling surface 58 that faces the outer end opening of the intake port 36 so as to connect the downstream end of the intake pipe 57 so as to face obliquely upward in the side view of the vehicle. Therefore, it is possible to connect the intake pipe 57 and the intake port 36 while suppressing the bending, and it is possible to guide the premixed air smoothly to the combustion chamber 35 while suppressing the adhesion of fuel to the intake pipe 57.

  Further, since the cover coupling surface 60 for coupling the intake valve side maintenance cover 48 is formed on the cylinder head 25 on the same plane PL as the intake pipe coupling surface 58, the intake pipe coupling surface 58 and the cover coupling are formed. The surface 60 can be formed simultaneously by one processing, and the number of processing steps can be reduced.

  The air cleaner 54 is a partition that closes the opening end of the cleaner case 65 by forming a purification chamber 69 between the bowl-shaped cleaner case 65 opened forward and the cleaner case 65 while holding the cleaner element 68. An unpurified chamber 70 is formed between the plate 66 and the partition plate 66 while the outer peripheral portion of the partition plate 66 is sandwiched between the cleaner case 65 and the cleaner case 65 from the front. And a protrusion 66a that forms a bulging chamber 72 communicating with the inside of the purification chamber 69 so as to protrude toward the unpurified chamber 70. Therefore, the volume of the purification chamber 69 can be increased as much as possible.

  Further, a portion 55b accommodated in the purification chamber 69 of the connecting tube 55 is formed to be curved in a U-shape opened rearward below the main frame 14, so that the length of the intake pipe is extended. Can increase the low-speed torque.

  A mounted portion 65a provided on the upper portion of the air cleaner 54 is fastened to a stay 73 of the main frame 14 with a bolt 74 having an axis extending in the vehicle width direction, and fuel is generated in the vehicle width direction of the lower edge portion 54a of the air cleaner 54. Since the fuel injection valve 63 is arranged at the lowermost edge 54aa of the portion where the injection valve 63 is arranged outside the virtual rotation locus CT1 drawn around the axis of the bolt 74, the air cleaner 54 is Even if the bolt 74 is pivoted backward by receiving an excessive load from the front due to an event, interference between the air cleaner 54 and the fuel injection valve 63 can be avoided.

  Further, the lower edge portion 54a of the air cleaner 54 is formed so as to incline toward the lower position as it goes in the vehicle width direction (leftward in this embodiment) when viewed from the front of the vehicle. The capacity of the lower portion of the air cleaner 54 can be increased as much as possible at a portion that does not overlap the valve 63, and the fuel injection valve 63 has its upper end portion flush with the lower end portion of the air cleaner 54 as viewed from the side of the vehicle. However, since the air cleaner 54 receives an excessive load from the front due to some event, the air cleaner 54 and the fuel injection valve 63 interfere with each other even if the bolt 74 is rotated backward with the bolt 74 as a fulcrum. It can be avoided.

  A quick connector 83 is provided at the end of the fuel hose 82 for supplying fuel to the fuel injection valve 63 on the fuel injection valve 63 side, and engages with the quick connector 83 connected to the combustion injection valve 63. Since the stop rib 57b is provided integrally with the intake pipe 57, the fuel hose 82 can be held at a predetermined position without increasing the number of parts.

  Furthermore, since the fuel hose 82 is disposed on the inner side of the outermost end in the vehicle width direction of the engine body 21, contact and interference from the outside to the fuel hose 82 can be suppressed.

  As a modification of the present invention, as shown in FIGS. 11 and 12, an air cleaner 54 ′ whose vertical length is shorter than that of the air cleaner 54 shown in the above embodiment is disposed between the cylinder head 25 and the main frame 14. You may make it do.

  The air cleaner 54 ′ is connected to the upstream end portion of the throttle body 56 via a connecting tube 55, and the downstream end portion of the throttle body 56 is connected to the cylinder via an intake pipe 57 connected to the intake port 36 of the cylinder head 25. Connected to the upper side wall of the head 25. A part of the fuel injection valve 63 is inserted into a valve mounting hole 80 provided on the front side of the intake pipe 57, and the fuel injection valve 63 includes the intake pipe 57 and a cap 81 fastened to the intake pipe 57. Is held, the fuel injection valve 63 is attached to the front side of the intake pipe 57. Further, a quick connector 83 provided at an end portion of the fuel hose 82 on the fuel injection valve 63 side is fitted and connected to a connection pipe 81 a included in the cap 81.

  The air cleaner 54 ′ forms a purification chamber 69 ′ between the bowl-shaped cleaner case 65 ′ opening forward and the cleaner case 65 ′ while holding the cleaner element 68, thereby opening the cleaner case 65 ′. A partition plate 66 'that closes the end, and an outer peripheral portion of the partition plate 66' is fastened to the cleaner case 65 'from the front so as to be sandwiched between the cleaner case 65' and the partition plate 66 '. And a cleaner cover 67 'forming an unpurified chamber 69'.

  In addition, a pair of left and right attachment portions 65 a ′ provided on the upper portion of the cleaner case 65 ′ in the air cleaner 54 ′ are screwed to the stay 73 fixed to the main frame 14 and the pair of left and right bolts 74. It is fastened with a nut 75 to be joined.

  Moreover, the lowermost part 54aa 'of the lower edge part 54a' of the air cleaner 54 'where the fuel injection valve 63 is arranged in the vehicle width direction fastens the upper part of the air cleaner 54 to the stay 73 of the main frame 14. Not only the fuel injection valve 63 is disposed outside the virtual rotation locus CT2 drawn around the axis of the bolt 74, but also the cap 81, quick connector 83 and fuel hose 82 related to the fuel injection valve 63. The fuel system parts such as are also arranged outside the virtual rotation locus CT2.

  Further, as shown in FIG. 12, the lower edge portion 54a 'of the air cleaner 54' is inclined so as to become a lower position in the vehicle front view as it goes to one side in the vehicle width direction (to the left in this embodiment). The cap 81, the quick connector 83, and the fuel hose 82 are also formed at lower positions in the vehicle width direction (to the left in this embodiment) corresponding to the lower edge portion 54a '. Are arranged as follows.

  The air cleaner 54 'has a drain pipe 90. The drain pipe 90 avoids fuel system parts such as the cap 81, the quick connector 83, and the fuel hose 82 outward in the vehicle width direction. The lower edge portion 54a 'is suspended downward from the lowest position in the vehicle width direction.

  According to this modification, even if the air cleaner 54 ′ receives an excessive load from the front due to some event and rotates backward with the bolt 74 as a fulcrum, the air cleaner 54 ′ having the drain pipe 90 does not perform fuel injection. In addition to avoiding interference with the valve 63, interference with fuel system components such as the cap 81, the quick connector 83, and the fuel hose 82 can be avoided.

  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. Is possible.

  For example, in the above-described embodiment, the intake passage forming member to which the fuel injection valve 63 is attached is the intake pipe 57, but the throttle body 56 may be an intake passage forming member to which the fuel injection valve 63 is attached.

12 ... Steering handle 13 ... Head pipe 14 ... Main frame 21 ... Engine body 25 ... Cylinder head 36 ... Intake ports 54, 54 '... Air cleaners 54a, 54a' ··· Lower edge portions 54aa, 54aa 'of the air cleaner ··· Lowermost portion 57 of a portion of the lower edge portion of the air cleaner where the fuel injection valve is arranged in the vehicle width direction · · · an intake pipe 57b that is an intake passage forming member ··· Anti-rotation rib 61 ··· Intake passage 63 ··· Fuel injection valve 65a ··· Attached portion 74 ··· A bolt 82 that is a fastening member ··· Fuel hose 83 ··· Quick connector C ··· Cylinder axis CT1, CT2 ... Virtual rotation locus F ... Body frame

Claims (3)

A vehicle body frame (F) having a head pipe (13) that supports the steering handle (12) in a steerable manner and a main frame (14) that is inclined rearwardly downward from the head pipe (13) and extends rearward. An engine body (21) disposed below the main frame (14) is mounted with a cylinder axis (C) inclined forward, and a cylinder head (25) constituting a part of the engine body (21) and An intake passage forming member forming a part of an intake passage (61) connecting an air cleaner (54, 54 ') disposed between the main frames (14) and an intake port (36) of the cylinder head (25). In the saddle-ride type vehicle internal combustion engine in which the fuel injection valve (63) is attached to the front side of (57),
A mounted portion (65a) provided at an upper portion of the air cleaner (54, 54 ') is fastened to the main frame (14) by a fastening member (74) having an axis extending in the vehicle width direction, and the air cleaner (54, 54 ′) is formed so that the lower edge portion (54a, 54a ′) is inclined so as to become a lower position toward one side in the vehicle width direction when viewed from the front of the vehicle.
Of the lower edge portions (54a, 54a ') of the air cleaner (54, 54'), the lowermost portion (54aa, 54aa ') of the portion where the fuel injection valve (63) is arranged in the vehicle width direction is the fastening member ( 74) The fuel injection so as to be outside the virtual rotation locus (CT1, CT2) drawn around the axis of 74) and with the upper end portion being flush with the lower end portion of the air cleaner (54) in a side view of the vehicle. The internal combustion engine for a saddle-ride type vehicle, wherein a valve (63) is disposed below the air cleaner (54) . A quick connector (83) is provided at an end of the fuel injection valve (63) side of a fuel hose (82) for supplying fuel to the fuel injection valve (63), and the intake passage forming member (57) The internal combustion engine for a saddle-ride type vehicle according to claim 1, wherein a detent rib (57b) that engages with the quick connector (83) connected to the combustion injection valve (63) is integrally provided. The internal combustion engine for a saddle-ride type vehicle according to claim 2 , wherein the fuel hose (82) is disposed inside an outermost end in the vehicle width direction of the engine body (21).

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