JP5004098B2 - Air intake structure for saddle-ride type vehicles - Google Patents

Description

  The present invention relates to an intake structure for a saddle-ride type vehicle, and more particularly, to an intake structure for a saddle-ride type vehicle in which the periphery of an engine is not covered with a vehicle body cover or the like.

  As a conventional intake structure of a saddle-ride type vehicle, an intake pipe connected to an intake port of a cylinder head is connected to an engine cylinder head mounted on a body frame, and fuel is injected into the intake pipe toward the intake port. The fuel hose and the fuel injection valve are connected to each other by a fuel joint having a connecting pipe portion to which a fuel hose for guiding fuel to the fuel injection valve is connected. The fuel joint is connected to the head of the fuel injection valve. The fuel hose is connected to the fuel joint and is connected to the intake pipe so that the fuel injection valve is sandwiched between the intake pipe and the intake pipe and the fuel hose. A fuel hose stay that fixes the relative position is fastened to an intake pipe (see, for example, Patent Document 1).

Japanese Patent No. 3923420

  By the way, in the intake structure of the saddle-ride type vehicle described in Patent Document 1, since the fuel injection valve is disposed at a position covered with a vehicle body cover or the like, the fuel injection valve is sufficiently protected. In the case of a vehicle in which the valve is not covered with a body cover or the like, the fuel injection valve is exposed to the outside.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to sufficiently protect the fuel injection valve even if the fuel injection valve is a vehicle that is not covered with a vehicle body cover or the like. An object is to provide an intake structure for a saddle-ride type vehicle.

In order to achieve the above object, the invention according to claim 1 is an engine mounted on a vehicle body frame and having a cylinder head, an intake pipe connected to an intake port of the cylinder head, an intake pipe attached to the intake pipe, In an intake structure of a saddle-ride type vehicle comprising: a fuel injection valve that injects fuel into a port; and a joint that is attached to an intake pipe via a fixed portion while supplying at least one of fuel and electric power to the fuel injection valve. fixing part of the joint is a boss which is attached is formed in the intake pipe, fuel both laterally volume scan of the fuel injection valve is disposed, the fixed portion of the joint, while facing each boss while bifurcated from the base of the joint Provided to extend in an oblique direction so as to intersect the fuel injection axis of the injection valve, and has a pair of tip portions, and the fixed portion of the joint is a pair The tip is attached to the boss with a bolt, and the pair of tips is positioned below the upper end of the coupler that is connected to the fuel injection valve and supplies electric power, and the fixed portion as viewed in the fuel injection axis direction of the fuel injection valve And the coupler do not overlap .

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the joint is disposed in front of the fuel injection valve, and a plate-shaped front protection portion that connects between the two fixing portions branched into two branches. Is further provided.

According to a third aspect of the invention, in addition to the configuration of the first or second aspect of the invention, the intake pipe has a bent portion with an intake passage extending in the vehicle front-rear direction, and a fuel injection valve and The boss is arranged so as to be aligned along the vehicle width direction at the bent portion, and the boss is formed with a female screw fastened by a fixing portion and a bolt.

Invention of claim 4, in addition to the configuration of the invention according to any one of claims 1 to 3, an engine is disposed below the vehicle body frame, a fuel injection valve, the vertical direction on top of the intake pipe The joint covers the upper side of the fuel injection valve, the fuel supply path to the fuel injection valve is arranged along the vehicle body frame, and the boss extends in the vertical direction substantially parallel to the fuel injection valve. The fixing portion is attached to the upper end of the boss, and extends in a vertical direction substantially parallel to the boss.
As in the invention described in claim 5, in addition to the structure of the invention described in any one of claims 1 to 4, the fixing portion includes a pair of ribs respectively extending from the base portion of the joint to the pair of tip portions. It is provided.
As in the invention described in claim 6, in addition to the configuration of the invention described in any one of claims 1 to 5, the joint includes a connecting pipe portion to which a fuel hose for guiding fuel from the outside is connected. The connecting pipe portion extends from the base portion toward the rear of the vehicle.
As in the invention described in claim 7, in addition to the configuration of the invention described in any one of claims 1 to 6, the connection pipe portion of the joint is above a plane perpendicular to the fuel injection axis of the fuel injection valve. It is characterized by being oriented.
As in the invention described in claim 8, in addition to the configuration of the invention described in any one of claims 1 to 7, the connecting pipe portion of the joint is located above the upper end of the coupler, and the fuel injection valve The connecting pipe portion of the joint and the coupler do not overlap with each other when viewed in the fuel injection axis direction.

According to the intake structure of the saddle-ride type vehicle according to claim 1, the boss to which the joint fixing portion is attached is formed in the intake pipe, and the joint fixing portion and the boss are arranged on the side of the fuel injection valve. The side of the fuel intake valve can be protected by the joint fixing portion and the boss. Thereby, even if the fuel injection valve is a vehicle that is not covered with a vehicle body cover or the like, sufficient protection of the fuel injection valve can be ensured.
In addition, the boss is formed on both sides of the fuel injection valve, and the joint fixing part is bifurcated and extends to both sides of the fuel injection valve, and is attached to the boss. The fixing portion and the boss can be protected, and the joint can be well fixed to the boss.

According to the intake structure of the saddle-ride type vehicle according to claim 2 , the joint is disposed in front of the fuel injection valve, and includes a plate-like front protection portion that connects between the fixing portions that are bifurcated. The strength of the fixed portion can be improved, and the front of the fuel injection valve is covered with the front protection portion, so that the protection of the fuel injection valve can be further ensured.

According to the intake structure of the saddle-ride type vehicle according to claim 3 , the intake pipe has a bent portion with the intake passage extending in the vehicle front-rear direction, and the fuel injection valve and the boss are arranged at the bent portion. Arranged along the width direction, the boss is formed with a female screw that is fastened by a fixing part and a bolt, so that the length of the boss (female screw) can be easily secured. Can be further improved.

According to the intake structure of the saddle-ride type vehicle according to claim 4 , the engine is disposed below the vehicle body frame, the fuel injection valve is supported in the vertical direction on the upper portion of the intake pipe, and the joint is Covering the upper part of the fuel injection valve, a fuel supply path to the fuel injection valve is arranged along the vehicle body frame, the boss extends in a vertical direction substantially parallel to the fuel injection valve, and the fixed portion is at the upper end of the boss. Since it is attached and extends in the vertical direction substantially parallel to the boss, the fuel supply path can be protected by the vehicle body frame, and the joint can be downsized.

  Hereinafter, an embodiment of an intake structure for a saddle-ride type vehicle according to the present invention will be described in detail with reference to the drawings. It should be noted that the drawings are viewed in the direction of the reference numerals, and in the following description, front, rear, left and right, and top and bottom are in accordance with the direction seen from the driver, and the front of the vehicle is Fr, the rear is Rr, the left is L, and the right is R, upper is shown as U, and lower is shown as D.

  As shown in FIG. 1, a motorcycle 10 that is a saddle-ride type vehicle according to this embodiment includes a main frame (body frame) 12 that extends rearward and downward from a head pipe 11, and is rotatable to the head pipe 11. The front fork 13 supported by the front fork 13, the front wheel WF rotatably supported by the lower end portion of the front fork 13, the steering handle 14 attached to the upper end portion of the front fork 13, and the lower portion of the main frame 12. The engine 30, a pair of left and right pivot plates 16 fixed to the lower rear end of the main frame 12, a swing arm 17 swingably supported by the pivot plate 16, and a rear end of the swing arm 17 so as to be rotatable. A rear wheel WR that is supported and transmits the power of the engine 30 via a chain and a sprocket (not shown); A seat frame 18 connected to the bent portion of the main frame 12 and extending rearward, and a rear subframe 19 connected to the lower rear portion of the main frame 12 and extending rearward and upward and having a rear end connected to the seat frame 18. Prepare. In FIG. 1, reference numeral 21 is a headlight, 22 is a fuel tank, 23 is a seat, 24 is a loading platform, 25 is a front fender, 26 is a rear fender, and 27 is a small case.

  The engine 30 is an air-cooled four-stroke single-cylinder engine, and its outer shell mainly includes a crankcase 31, a cylinder 32 joined substantially horizontally to the front end portion of the crankcase 31, and a front end portion of the cylinder 32. A cylinder head 33 to be joined, a cylinder head cover 34 that covers the front opening of the cylinder head 33, and a crankcase side cover 35 that covers openings on the left and right side surfaces of the crankcase 31 are configured.

  An upstream end of the intake port 36 a is formed in the upper side wall of the cylinder head 33 so as to open. A throttle body 40 is connected to the intake port 36 a via an intake pipe 50. An air cleaner 37 that cleans the intake air is connected to the upstream end. An exhaust port 36 b is formed in the lower side wall of the cylinder head 33, and a muffler 39 is connected to the exhaust port 36 b through an exhaust pipe 38.

  As shown in FIGS. 2 to 4, the intake pipe 50 is bent from the rear upper side to the front lower side, and a fuel injection valve 60 for injecting fuel into the intake port 36 a is directed upward and downward at the upper part of the intake pipe 50. The fuel injection valve 60 is sandwiched between the intake pipe 50 and a joint 70 fastened to the intake pipe 50. 2 and 3, a reference numeral 45 denotes a throttle drum provided on the right side surface of the throttle body 40, a reference numeral 46 denotes a throttle cable connected to the throttle drum, and a reference numeral 47 denotes a cylinder fixed to the cylinder head 33. A plug cable, which is connected to the illustrated plug, a reference numeral 33 a, is an insulator interposed between the intake pipe 50 and the cylinder head 33. 2 is the injection axis of the fuel injection valve 60, and the alternate long and short dash line Y is a center line of an intake passage 54 of the intake pipe 50 to be described later.

  As shown in FIGS. 4 and 5, the intake pipe 50 includes a base portion 51 fastened to the upper side wall of the cylinder head 33 by bolts 81, 81, a bent portion 52 extending rearward and upward from the base portion 51, and a bent portion. A connecting portion 53 provided at the upstream end of the portion 52, to which the throttle body 40 is attached, an intake passage 54 extending along the vehicle longitudinal direction from the base member 51 to the connecting portion 53, and a vehicle of the bent portion 52 A fitting hole 55 provided at the center in the width direction and into which a nozzle portion 62 of a fuel injection valve 60 described later is fitted, and on both sides of the fitting hole 55 in the vehicle width direction, stands on a plane perpendicular to the vehicle body longitudinal direction. And a pair of left and right bosses 56 to which a pair of left and right fixing portions 73 of a joint 70 described later are fastened by bolts 82 and 82.

  Further, bolt insertion holes 57 for inserting bolts 81 for fixing the intake pipe 50 to the cylinder head 33 are formed at both ends of the base 51 of the intake pipe 50 in the vehicle width direction. The boss 56 is formed with a female screw 58 that is screwed into the bolt 82.

  As shown in FIG. 4, the fuel injection valve 60 includes a main body portion 61, a nozzle portion 62 that extends downward from the main body portion 61 and fits into the fitting hole 55 of the intake pipe 50, and upwards from the main body portion 61. A fuel supply portion 63 that extends and is fitted with a base portion 71 of the joint 70, and a coupler portion that extends rearward and upward from the main body 61 and is connected to an external coupler 43 of a harness 42 that extends from a control unit 41 provided in the throttle body 40. 64. The opening / closing operation of the fuel injection valve 60 is controlled by the control unit 41 of the throttle body 40. In FIG. 4, reference numeral 65 denotes a seal member that ensures airtightness between the nozzle portion 62 and the fitting hole 55 of the intake pipe 50, and reference numeral 66 denotes a fuel supply portion 63 and a base portion 71 of the joint 70. This is an O-ring that ensures airtightness.

  As shown in FIGS. 2 to 4, the joint 70 includes a base 71 fitted to the fuel supply part 63 of the fuel injection valve 60, and a fuel hose 29 extending rearward from the base 71 and extending from the fuel pump 28. A connecting pipe portion 72 to be connected, and a pair of left and right fixing portions that bifurcate so as to form a T-shape when viewed from above on both sides in the vehicle width direction of the base portion 71 and extend to both sides in the vehicle width direction of the fuel injection valve 60. 73, and attached to a pair of left and right bosses 56 of the intake pipe 50 via a pair of left and right fixing portions 73. Moreover, in this embodiment, the joint 70 is arrange | positioned so that the upper direction of the fuel injection valve 60 may be covered.

  In addition, the connecting pipe portion 72 has a fuel supply path 72a that allows the fuel hose 29 and the fuel injection valve 60 to communicate with each other and supplies fuel to the fuel injection valve 60. It is arrange | positioned along the main frame 12 extended in the front-back direction.

  In the present embodiment, the pair of left and right bosses 56 of the intake pipe 50 extend in the vertical direction substantially parallel to the fuel injection valve 60, and the pair of left and right fixing portions 73 of the joint 70 are formed on the pair of left and right bosses 56. It is fastened by bolts 82 and extends in the vertical direction substantially parallel to the pair of left and right bosses 56.

  In the present embodiment, the left and right bosses 56 of the fuel injection valve 60 and the intake pipe 50 are arranged along the vehicle width direction in the bent portion 52 of the intake pipe 50. Thereby, the fixed portion 73 of the joint 70 and the boss 56 of the intake pipe 50 are disposed on both sides of the fuel injection valve 60 in the vehicle width direction.

  As described above, according to the intake structure of the saddle-ride type vehicle of the present embodiment, the pair of left and right bosses 56 to which the pair of left and right fixing portions 73 of the joint 70 are attached are formed in the intake pipe 50, and the fuel injection valve 60. Since the pair of left and right fixing portions 73 and the pair of left and right bosses 56 are disposed on the sides of the fuel intake valve 60, the side portions of the fuel intake valve 60 can be protected by the fixing portions 73 and the bosses 56 of the joint 70. Thereby, even if the fuel injection valve 60 is a vehicle that is not covered with a vehicle body cover or the like, sufficient protection of the fuel injection valve 60 can be ensured.

  Further, according to the intake structure of the saddle-ride type vehicle of this embodiment, the pair of left and right bosses 56 are formed on both sides of the fuel injection valve 60, and the pair of left and right fixing portions 73 of the joint 70 are bifurcated. At the same time, the fuel injection valve 60 extends to both sides of the fuel injection valve 60 and is attached to the pair of left and right bosses 56. Further, the joint 70 can be fixed to the pair of left and right bosses 56 favorably.

  Further, according to the intake structure of the saddle-ride type vehicle of the present embodiment, the intake pipe 50 has the intake passage 54 extending in the vehicle front-rear direction and the bent portion 52, and the fuel injection valve 60 and the pair of left and right The bosses 56 are arranged in the bent portion 52 so as to be aligned along the vehicle width direction. Since the female screws 58 fastened by the pair of left and right fixing portions 73 and the bolts 82 are formed on the pair of left and right bosses 56, The length of the female screw 58 of the pair of bosses 56 can be easily secured, and the fixing of the joint 70 to the pair of left and right bosses 56 can be further improved.

  Further, according to the intake structure of the saddle-ride type vehicle of the present embodiment, the engine 30 is disposed below the main frame 12, and the fuel injection valve 60 is supported on the upper portion of the intake pipe 50 in the vertical direction. The joint 70 covers the upper side of the fuel injection valve 60, a connecting pipe portion 72 having a fuel supply path 72 a to the fuel injection valve 60 is disposed along the main frame 12, and the pair of left and right bosses 56 are formed of the fuel injection valve The pair of left and right fixing portions 73 are attached to the upper ends of the pair of left and right bosses 56 and extend in the up and down direction substantially parallel to the pair of left and right bosses 56. The portion 72 can be protected by the main frame 12, and the joint 70 can be reduced in size.

  As a modification of the present embodiment, as shown in FIG. 6, a plate-like front protection that connects between a pair of left and right fixing portions 73 that are disposed in front of the fuel injection valve 60 and bifurcated into the joint 70, as shown in FIG. 6. You may make it form the shield board 74 which is a part. In this case, the strength of the pair of left and right fixing portions 73 of the joint 70 can be improved, and the front of the fuel injection valve 60 is covered with the shield plate 74, so that the protection of the fuel injection valve 60 can be further secured. it can.

1 is a left side view for explaining a motorcycle on which an embodiment of an intake structure for a saddle-ride type vehicle according to the present invention is mounted. FIG. FIG. 2 is an enlarged right side view for explaining the periphery of a throttle body shown in FIG. 1. FIG. 2 is an enlarged perspective view for explaining the periphery of a throttle body shown in FIG. 1. It is a figure which shows the assembly | attachment state of an intake pipe, a fuel-injection apparatus, and a joint, (a) is a top view, (b) is an AA arrow directional cross-sectional view of (a). It is a figure which shows the single item of an intake pipe, (a) is a top view, (b) is a partially notched right view. FIG. 6 is an enlarged perspective view for explaining a modification of the intake structure of the saddle-ride type vehicle according to the present invention.

Explanation of symbols

10 Motorcycles (saddle-ride type vehicles)
12 Main frame (body frame)
30 Engine 33 Cylinder head 36a Intake port 40 Throttle body 50 Intake pipe 52 Bent part 54 Intake passage 56 Boss 60 Fuel injection valve 70 Joint 72 Connection pipe part 72a Fuel supply path 73 Fixing part 74 Shield plate (front protection part)
82 volts

Claims (8)

An engine mounted on a vehicle body frame and having a cylinder head, an intake pipe connected to an intake port of the cylinder head, a fuel injection valve attached to the intake pipe and injecting fuel into the intake port, and the fuel injection In the intake structure of a saddle-ride type vehicle comprising: a joint that is attached to the intake pipe through a fixed portion while supplying at least one of fuel and electric power to the valve;
A boss to which the fixed portion of the joint is attached to the intake pipe is formed,
Is arranged before Symbol bosses on both sides of the fuel injection valve,
The fixed portion of the joint is bifurcated from a base portion of the joint and is provided to extend in an oblique direction so as to cross the fuel injection axis of the fuel injection valve while facing each of the bosses. The tip of
The fixing portion of the joint is attached to the boss with a bolt at the pair of tip portions,
The pair of tip portions are located below the upper end of a coupler that is connected to the fuel injection valve and supplies electric power,
An intake structure for a saddle-ride type vehicle , wherein the fixed portion and the coupler do not overlap in a fuel injection axis direction view of the fuel injection valve . 2. The saddle-ride type vehicle according to claim 1 , wherein the joint further includes a plate-shaped front protection portion that is disposed in front of the fuel injection valve and connects between the fixing portions that are bifurcated. 3. Intake structure. The intake pipe has a bent portion with an intake passage extending in the vehicle front-rear direction,
The fuel injection valve and the boss are arranged along the vehicle width direction at the bent portion,
The intake structure for a saddle-ride type vehicle according to claim 1 or 2 , wherein the boss is formed with a female screw fastened by the fixing portion and a bolt. The engine is disposed below the body frame,
The fuel injection valve is supported on the upper part of the intake pipe in the vertical direction,
The joint covers an upper part of the fuel injection valve, and a fuel supply path to the fuel injection valve is disposed along the vehicle body frame,
The boss extends in a vertical direction substantially parallel to the fuel injection valve,
The intake structure for a saddle-ride type vehicle according to any one of claims 1 to 3 , wherein the fixing portion is attached to an upper end of the boss and extends in a vertical direction substantially parallel to the boss. The intake structure for a saddle-ride type vehicle according to any one of claims 1 to 4, wherein the fixing portion is provided with a pair of ribs respectively extending from the base portion of the joint to the pair of tip portions. . The joint includes a connecting pipe portion to which a fuel hose for guiding fuel from the outside is connected,
The intake structure for a saddle-ride type vehicle according to any one of claims 1 to 5, wherein the connection pipe portion of the joint extends from the base portion toward the rear of the vehicle. The intake structure for a saddle-ride type vehicle according to any one of claims 1 to 6, wherein the connecting pipe portion of the joint is directed upward from a plane orthogonal to a fuel injection axis of the fuel injection valve. . The connecting pipe portion of the joint is located above the upper end of the coupler;
The intake structure for a saddle-ride type vehicle according to any one of claims 1 to 7, wherein the connecting pipe portion of the joint and the coupler do not overlap with each other when the fuel injection valve is viewed in the fuel injection axis direction.

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