JP2008232135A - Saddle type vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motorcycle 10 surely connecting a throttle body 45 and an intake manifold 70 at the time of using a swing-type power unit 30. <P>SOLUTION: The motorcycle 10 is provided with a connecting band 90 and a bracket 100 on the intake manifold side. The connecting band 90 covers the outside of the connecting portion between the delivery pipe 80 of the throttle body 45 and the intake manifold 70. The bracket 100 on the intake manifold side connects the throttle body 45 and the intake manifold 70 with each other along the outer surface of the connecting band 90. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a straddle-type vehicle using a swing type power unit in which a power unit is swingably supported by the body frame, and more particularly to a structure of a connection portion between a throttle body attached to an engine and an intake manifold.

  In a straddle-type vehicle such as a motorcycle, a throttle body is widely used to supply air into a cylinder of an installed engine. The throttle body is connected to an intake manifold that communicates with the cylinder via an intake port of the engine. The throttle body includes a throttle valve that adjusts the opening area of the intake passage, and is provided integrally with a fuel supply device such as a carburetor or a fuel injection.

Further, in order to suppress vibration and heat transfer to the throttle body, a method of connecting the throttle body and the intake manifold using an annular connection band formed by an elastic member such as rubber is known. Furthermore, in order to prevent the intake manifold from coming off from the air-fuel mixture delivery portion of the throttle body, the outer peripheral portion of the insulator is tightened with a tightening band (for example, see Patent Document 1).
Japanese Patent Publication No. 4-23611

  However, there is room for further improvement in the conventional method for connecting the throttle body and the intake manifold.

  In particular, in a swing type power unit in which the engine and the power transmission unit including the belt type continuously variable transmission are integrally formed and supported by the body frame so as to be swingable, the throttle body and the intake manifold are attached. The generated engine swings with the power transmission unit as the saddle riding type vehicle travels. For this reason, it has been desired to more reliably connect the throttle body and the intake manifold.

  Therefore, the present invention has been made in view of such a situation, and provides a straddle-type vehicle that can more reliably connect a throttle body and an intake manifold when a swing type power unit is used. For the purpose.

  In order to solve the problems described above, the present invention has the following features. First, a first feature of the present invention is that a power unit (swing-type power unit 30) in which an engine that generates power (engine 50) and a power transmission unit (power transmission unit 55) that transmits the power are integrally formed. A throttle body that adjusts the flow rate of gas flowing out from the delivery pipe by opening and closing of the throttle valve, and (the throttle body) 45), an intake manifold (intake manifold 70) connected to the engine and the delivery pipe, a connection band (connection band 90) for tightening the outside of a connection portion between the delivery pipe and the intake manifold, and the connection Intake manifold side bracket for connecting the throttle body and the intake manifold along the outer surface of the band An intake manifold side bracket 100), the connection band is formed in an annular shape by an elastic member having a predetermined rigidity, and the intake manifold side bracket is formed by a member having a rigidity higher than that of the connection band, and the throttle The body has a throttle body side attachment portion (throttle body side attachment portion 101) to which one end of the intake manifold side bracket is attached, and the intake manifold is attached to the intake manifold side to which the other end of the intake manifold side bracket is attached. It has a gist of having a portion (intake manifold side mounting portion 102).

  According to the straddle-type vehicle according to the first feature, the coupling band can absorb the fine vibration propagating through the delivery pipe and the intake manifold, and the coupling bracket can suppress the displacement of the connection portion. it can. That is, the connecting bracket can suppress the shift of the connecting portion that occurs with the swinging of the swing type power unit to the minute vibration that can be absorbed by the connecting band. As a result, the connecting portion between the delivery pipe and the intake manifold can be more reliably connected.

  Further, by disposing the connecting bracket along the outer surface of the connecting band and causing the connecting bracket and the connecting band to cooperate, the shift of the connecting portion can be absorbed as fine vibration.

  Thus, according to the straddle-type vehicle according to the first feature, the throttle body and the intake manifold can be more reliably connected.

  A second feature of the present invention relates to the first feature of the present invention, wherein the throttle body side mounting portion is adjacent to an end portion of the connecting band on the throttle body side, and the intake manifold side mounting portion is The gist of the invention is that it is adjacent to the end of the connection band on the intake manifold side.

  A third feature of the present invention relates to the first feature of the present invention, wherein an outer surface of the connection band is provided with a first tightening band (first tightening band 91) disposed closer to the throttle body, The gist is that the second tightening band (second tightening band 92) is adjacent to the first tightening band and disposed closer to the engine than the first tightening band.

  According to a fourth aspect of the present invention, in accordance with the first aspect of the present invention, a first reference line along a direction in which one end of the intake manifold side bracket is attached to and detached from the throttle body side mounting portion, and the intake air. The gist is that the second reference line along the direction in which the other end of the intake manifold side bracket is attached to and detached from the manifold side mounting portion intersects.

  A fifth feature of the present invention relates to the fourth feature of the present invention, and is summarized in that the first reference line and the second reference line intersect at an acute angle on the opposite side of the connection band. .

  A sixth feature of the present invention relates to the first feature of the present invention, and is summarized in that the intake manifold side bracket has a curved portion formed by bending.

  A seventh feature of the present invention relates to the first feature of the present invention, and is summarized in that the intake manifold side bracket has a bent portion formed by bending.

  An eighth feature of the present invention relates to the first feature of the present invention, and is summarized in that the intake manifold side bracket is formed of a metal material.

  A ninth feature of the present invention is the first feature of the present invention, wherein an elastic body (elastic body 103) is inserted between one end of the intake manifold side bracket and the throttle body side mounting portion. This is the gist.

  A tenth feature of the present invention relates to the first feature of the present invention, wherein an elastic body (elastic body 104) is inserted between the other end of the intake manifold side bracket and the intake manifold side mounting portion. It is a summary.

  An eleventh feature of the present invention relates to the first feature of the present invention, and is summarized in that the throttle body is provided integrally with a carburetor (carburetor 46).

  A twelfth feature of the present invention is according to the eleventh feature of the present invention, further comprising an engine side bracket (engine side bracket 200) for connecting the carburetor and the engine, wherein the engine side bracket includes the connection band. The carburetor includes a fuel cut valve (fuel cut valve 47) that cuts off fuel supply under a predetermined condition, and a fuel cut valve side to which one end of the engine side bracket is attached. And the engine has an engine side mounting portion (engine side mounting portion 202) to which the other end of the engine side bracket is mounted, and the fuel cut. The gist of the valve-side mounting portion is that it is adjacent to the fuel cut valve.

  A thirteenth feature of the present invention relates to the twelfth feature of the present invention, wherein an elastic body (elastic body 203) is inserted between one end of the engine side bracket and the fuel cut valve side mounting portion. This is the gist.

  A fourteenth feature of the present invention relates to the twelfth feature of the present invention, wherein an elastic body (elastic body 204) is inserted between the other end of the engine side bracket and the engine side mounting portion. Is the gist.

  A fifteenth feature of the present invention relates to the twelfth feature of the present invention, wherein the engine further includes a cylinder head (cylinder head 51) and a cylinder head cover (cylinder head cover 52) attached to the cylinder head. The engine side mounting portion is provided integrally with the cylinder head cover, and the cylinder head cover is attached to the cylinder head at the engine side mounting portion.

  According to a sixteenth feature of the present invention, there is provided a power unit in which an engine for generating power and a power transmission unit for transmitting the power are integrally formed, and the power unit is supported to be swingable with respect to a vehicle body. A ride type vehicle, provided integrally with a carburetor, for adjusting a flow rate of gas flowing out from a delivery pipe by opening and closing of a throttle valve, an intake manifold connected to the engine and the delivery pipe, A connection band for tightening the outside of a connection portion between the delivery pipe and the intake manifold, and an engine side bracket for connecting the carburetor and the engine, the connection band being formed in an annular shape by an elastic member having a predetermined rigidity The engine side bracket is formed of a member having a rigidity higher than that of the connection band, The carburetor has a fuel cut valve that cuts off fuel supply under a predetermined condition, and a fuel cut valve side mounting portion to which one end of the engine side bracket is attached, and the engine has the other end of the engine side bracket. The fuel cut valve side mounting portion is adjacent to the fuel cut valve.

  A seventeenth feature of the present invention relates to the sixteenth feature of the present invention, and is summarized in that an elastic body is inserted between one end of the engine side bracket and the fuel cut valve side mounting portion. .

  An eighteenth feature of the present invention is according to the sixteenth feature of the present invention, and is summarized in that an elastic body is inserted between the other end of the engine side bracket and the engine side mounting portion.

  A nineteenth feature of the present invention relates to the sixteenth feature of the present invention, wherein the engine further includes a cylinder head and a cylinder head cover attached to the cylinder head, and the engine-side attachment portion comprises the cylinder The gist is provided integrally with a head cover, and the cylinder head cover is attached to the cylinder head at the fourth attachment portion.

  A twentieth feature of the present invention relates to the first or sixteenth feature of the present invention, and includes a first fuel hose (first fuel hose 110a) for sending fuel supplied to the throttle body, A fuel receiving port (fuel receiving port 125) through which the fuel flows, a first fuel hose side end (first fuel hose side end 120a) to which the first fuel hose is connected, and the fuel receiving port It has a gist having a hose relay pipe (hose relay pipe 120) formed with a throttle body side end portion (throttle body side end portion 120b) and a pipe fixing stay (130) for fixing the hose relay pipe. To do.

  A twenty-first feature of the present invention relates to the twentieth feature of the present invention, and has a second fuel hose connected to the throttle body side end of the hose relay pipe and a fuel receiving port of the throttle body. This is the gist.

  A twenty-second feature of the present invention relates to the twenty-first feature of the present invention, and is summarized in that an outer diameter of the hose relay pipe is smaller than outer diameters of the first fuel hose and the second fuel hose. .

  A twenty-third feature of the present invention relates to the first or sixteenth feature of the present invention, and includes an air cleaner 40 for purifying air supplied to the throttle body, wherein the power unit is swingable by the vehicle body frame. The gist is that the air cleaner and the throttle body are disposed in front of the pivot portion.

  According to the features of the present invention, it is possible to provide a straddle-type vehicle that can more reliably connect a throttle body and an intake manifold when using a swing type power unit.

  Next, an embodiment of a saddle riding type vehicle according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

  In the present specification, terms are defined as follows. “Left side” and “right side” refer to the left side and the right side when facing the front from the rear of the motorcycle. “Inside” and “outside” refer to the center side / end side of the motorcycle in the vehicle width direction. “Front”, “rear”, “upper”, and “lower” refer to the front, rear, upper, and lower sides of the motorcycle.

1. First Embodiment << 1-1 >> Schematic Configuration of Motorcycle 10 A schematic configuration of the motorcycle 10 according to the present embodiment will be described. FIG. 1 is a left side view of a motorcycle 10 according to the present embodiment. FIG. 2 is an enlarged left side view of the swing type power unit 30.

  As shown in FIG. 1, the motorcycle 10 is a so-called underbone type motorcycle in which a vehicle body frame (not shown) is disposed below compared to a general motorcycle.

  The motorcycle 10 includes a front wheel 20, a rear wheel 25, a swing type power unit 30, a seat 35, a storage box 36, an air cleaner 40, a throttle body 45, and the like.

  In the swing type power unit 30, the engine 50 and the power transmission unit 55 are integrally formed. The swing type power unit 30 is swingably attached to the vehicle body frame at the pivot portion 60. The engine 50 according to the present embodiment is a water-cooled single cylinder four-cycle engine. The driving force generated by the engine 50 is transmitted to the rear wheel 25 via a V-belt transmission included in the power transmission unit 55.

  A storage box 36 is disposed under the seat 35 on which the rider sits.

  The air cleaner 40 supplies purified air to the throttle body 45 via the supply pipe 65. The air cleaner 40 is attached to the front surface of the engine 50. A throttle body 45 is disposed above the rear end of the air cleaner 40. As shown in FIG. 2, the air cleaner 40 and the throttle body 45 are disposed in front of the pivot portion 60. Accordingly, the air cleaner 40 and the throttle body 45 swing up and down as the swing type power unit 30 swings.

  The throttle body 45 includes a throttle valve that adjusts the opening area of the intake passage. Further, the throttle body 45 can be provided integrally with a fuel supply device such as a carburetor or a fuel injection (not shown). In this embodiment, the throttle body 45 is described as being provided integrally with the carburetor 46.

  The throttle body 45 is disposed between the storage box 36 and the rear end of the air cleaner 40. An intake manifold 70 is connected to the throttle body 45. The throttle body 45 sends the supplied air / fuel mixture to the intake manifold 70. Since the connecting portion between the throttle body 45 and the intake manifold 70 is a characteristic part of the present invention, it will be described in detail later.

  The intake manifold 70 communicates with the engine 50 via the intake port 75. The intake manifold 70 delivers an air-fuel mixture to the engine 50.

<< 1-2 >> Schematic Configuration of Intake System Parts A schematic configuration of the intake system parts of the motorcycle 10 according to the present embodiment will be described. FIG. 3 is an enlarged left side view showing the air cleaner 40, the throttle body 45, and the engine 50 attached.

  The throttle body 45 mixes the air supplied from the air cleaner 40 via the supply pipe 65 and the fuel supplied from a fuel tank (not shown) to generate an air-fuel mixture. The throttle body 45 is integrally provided with a delivery pipe 80 that delivers the generated air-fuel mixture to the intake manifold 70. Therefore, the throttle body 45 adjusts the flow rate of the gas flowing out from the delivery pipe 80 by opening and closing the throttle valve. The delivery pipe 80 according to the present embodiment is made of aluminum steel.

  The intake manifold 70 is connected to an intake port 75 provided at the upper end of the engine 50. The intake manifold 70 according to the present embodiment is made of aluminum steel. The air-fuel mixture that has passed through the intake manifold 70 is supplied to a cylinder (not shown) of the engine 50 via the intake port 75.

<< 2-1 >> Connection Portion between Intake Manifold 70 and Delivery Pipe 80 Next, a connection portion according to a characteristic portion of the present invention will be described with reference to FIG. FIG. 4 is an enlarged left side view of the connection portion between the intake manifold 70 and the delivery pipe 80 in FIG. As described above, the intake manifold 70 and the delivery pipe 80 are connected by the two connecting members (the connecting band 90 and the intake manifold side bracket 100).

<2-1-1> Connection band 90
The connection band 90 is an annular band that connects and connects the connection portion between the intake manifold 70 and the delivery pipe 80 from the outside. That is, the connecting band 90 tightens the outside of the connection portion between the intake manifold 70 and the delivery pipe 80.

  Here, the air-fuel mixture flows inside the intake manifold 70 and the delivery pipe 80. Therefore, it is preferable that the connection band 90 has solvent resistance. Further, when the motorcycle 10 is traveling or idling, slight vibration is generated in the intake manifold 70 and the delivery pipe 80. Therefore, an elastic member that can absorb the micro-vibration is used as the connection band 90. Further, as the connection band 90, a member having rigidity that can be connected by tightening the connection portion from the outside is used. In the present embodiment, a rubber band is used as such a connection band 90.

  As shown in FIG. 4, the outer surface of the connection band 90 is tightened by a first tightening band 91 and a second tightening band 92 that are arranged side by side. The first fastening band 91 is disposed closer to the throttle body 45. That is, the first tightening band 91 tightens the portion where the connection band 90 covers the delivery pipe 80. The second tightening band 92 is adjacent to the first tightening band 91 and is disposed closer to the engine 50 than the first tightening band 91. That is, the second tightening band 92 tightens the portion where the connection band 90 covers the intake manifold 70. As a material used for the first fastening band 91 and the second fastening band 92, it is preferable to use a metal material having a tensile strength capable of fixing the connection band 90. In the present embodiment, iron bands are used as the first tightening band 91 and the second tightening band 92 as described above.

<2-1-2> Intake manifold side bracket 100
The intake manifold side bracket 100 connects the throttle body 45 and the intake manifold 70 along the outer surface of the connection band 90. As shown in FIG. 4, the intake manifold side bracket 100 according to the present embodiment has a curved portion that is curved.

  Here, with the swing of the swing type power unit 30 while the motorcycle 10 is traveling, a force for shifting the connecting portion is generated. Therefore, it is preferable that the intake manifold side bracket 100 be formed of a metal material having rigidity that can suppress the displacement of the connecting portion between the throttle body 45 and the intake manifold 70. However, if the rigidity of the intake manifold side bracket 100 is too high, there is a risk of causing twisting and displacement in the entire intake system due to suppression of displacement of the connection portion. Therefore, the rigidity of the intake manifold side bracket 100 needs to be able to suppress the force for shifting the connecting portion to the minute vibration that can be absorbed by the connecting band 90. In the present embodiment, an iron bracket is used as such an intake manifold side bracket 100.

<< 2-2 >> Attachment Position of Intake Manifold Side Bracket 100 Next, an attachment position of the intake manifold side bracket 100 will be described with reference to FIG.

  One end of the intake manifold side bracket 100 is screwed to a throttle body side mounting portion 101 provided in the throttle body 45. The other end of the intake manifold side bracket 100 is screwed to an intake manifold side mounting portion 102 provided in the intake manifold 70. The intake manifold side bracket 100 connects the throttle body 45 and the intake manifold 70 by being attached in this way. Note that the method of attaching the intake manifold side bracket 100 is not limited to screwing, but may be welding or the like.

  The throttle body side mounting portion 101 is disposed adjacent to the end of the connecting band 90 on the throttle body 45 side. The intake manifold side mounting portion 102 is disposed adjacent to the end of the connection band 90 on the intake manifold 70 side. That is, the throttle body side mounting portion 101 and the intake manifold side mounting portion 102 are adjacent to both ends of the connecting band 90.

  Here, the throttle body side mounting portion 101 and the intake manifold side mounting portion 102 may not be in contact with both ends of the connecting band 90. That is, the throttle body side mounting portion 101 and the intake manifold side mounting portion 102 may be disposed in the vicinity of the connection band 90. Thus, the attachment position of the intake manifold side bracket 100 can be appropriately selected according to the shape, material characteristics, etc. of the intake manifold side bracket 100.

<<2-3> Mounting direction of intake manifold side bracket 100 As described above, one end of the intake manifold side bracket 100 according to the present embodiment is screwed to the throttle body side mounting portion 101. The other end of the intake manifold side bracket 100 is screwed to the intake manifold side mounting portion 102. Therefore, the direction in which both ends of the intake manifold side bracket 100 are attached and detached is the central axis direction of the fixing screw. Specifically, as shown in FIG. 4, the end of the intake manifold side bracket 100 on the throttle body 45 side is attached and detached along a first reference line α indicating the direction of the central axis of the screw. Further, the end of the intake manifold side bracket 100 on the intake manifold 70 side is attached and detached along a second reference line β indicating the direction of the central axis of the screw.

  Here, as shown in FIG. 4, the intake manifold side bracket 100 has a curved portion that is curved and is disposed so as to have a convex shape downward. Further, the upper surface of one end of the intake manifold side bracket 100 and the upper surface of the other end are not parallel. Accordingly, the first reference line α and the second reference line β intersect with each other instead of being parallel. In the present embodiment, the first reference line α and the second reference line β intersect at an acute angle on the opposite side of the connection band 90 when viewed from the position where the intake manifold side bracket 100 is disposed.

<< 2-4 >> Action / Effect The motorcycle 10 according to the present embodiment includes a connecting band 90 for tightening the outside of the connecting portion between the delivery pipe 80 and the intake manifold 70, and a throttle body 45 along the outer surface of the connecting band 90. An intake manifold side bracket 100 that connects the intake manifold 70 is provided. The connection band 90 is formed in an annular shape by an elastic member having a predetermined rigidity, and the intake manifold side bracket 100 is formed by a member having higher rigidity than the connection band 90.

  Therefore, the fine vibration propagating through the delivery pipe 80 and the intake manifold 70 can be absorbed by the connecting band 90, and the displacement of the connection portion can be suppressed by the intake manifold side bracket 100. That is, the intake manifold side bracket 100 can suppress the displacement of the connection portion that occurs due to the swing of the swing type power unit 30 to the minute vibration that can be absorbed by the connecting band 90. As a result, the connection portion between the delivery pipe 80 and the intake manifold 70 can be more reliably coupled.

  One end of the intake manifold side bracket 100 is attached to the throttle body side attachment portion adjacent to the end portion of the connection band on the throttle body 45 side, and the other end is attached to the end portion of the connection band 90 on the intake manifold 70 side. It is attached to the adjacent intake manifold side attachment. Therefore, the intake manifold side bracket 100 and the connecting band 90 can cooperate.

  The intake manifold side bracket 100 has a curved portion formed by bending, and a first reference line α along the direction in which one end of the intake manifold side bracket 100 is attached to and detached from the throttle body side mounting portion 101. The second reference line β along the direction in which the other end of the intake manifold side bracket 100 is attached to and detached from the intake manifold side mounting portion 102 intersects. Therefore, it is possible to avoid the force for shifting the connecting portion from being concentrated on a part of the intake manifold side bracket 100. As a result, the structural rigidity of the intake manifold side bracket 100 is improved with respect to the force for shifting the connecting portion.

  Further, the first reference line α and the second reference line β intersect at an acute angle on the opposite side of the connection band 90. Therefore, the intake manifold side bracket 100 can flexibly suppress vibrations in various directions of the connection portion. Further, since the first reference line α and the second reference line β intersect at an angle smaller than a right angle, the intake manifold side bracket 100 can be easily attached and detached.

  As described above, according to the motorcycle 10 according to the present embodiment, the throttle body 45 and the intake manifold 70 can be more reliably connected.

  Note that, when the air cleaner 40 and the throttle body 45 are disposed in front of the pivot portion 60 as in the motorcycle 10 according to the present embodiment, the swinging of these tends to increase. Even in such a motorcycle 10, the throttle body 45 and the intake manifold 70 can be reliably connected by including the connection band 90 and the intake manifold side bracket 100 according to the present embodiment.

<< 3-1 >> Attachment Structure of Fuel Hose 110 Next, the attachment structure of the fuel hose will be described with reference to FIG. FIG. 5 is an enlarged right side view showing a mounting state of the air cleaner 40, the throttle body 45 and the engine 50 which are intake system components.

  The motorcycle 10 includes a fuel hose 110 that sends fuel supplied to a carburetor 46 that is provided integrally with the throttle body 45. As shown in FIG. 5, the fuel hose 110 includes a first fuel hose 110a and a second fuel hose 110b. The throttle body 45 includes a hose relay pipe 120 and a fuel inlet 125.

  The first fuel hose 110a is a rubber hose for supplying fuel sent from a fuel tank (not shown) to the throttle body 45. The first fuel hose 110a is connected to the hose relay pipe 120.

  The hose relay pipe 120 is a metal pipe including a first fuel hose side end portion 120a and a throttle body side end portion 120b. The first fuel hose 110a is connected to the first fuel hose side end 120a. A second fuel hose 110b is connected to the throttle body side end 120b. The outer diameter of the hose relay pipe 120 is thinner than the outer diameters of the first fuel hose 110a and the second fuel hose 110b. Accordingly, the first fuel hose side end 120a is inserted into the first fuel hose 110a, and the throttle body side end 120b is inserted into the second fuel hose 110b.

  The second fuel hose 110 b is connected to the throttle body side end 120 b of the hose relay pipe 120 and the fuel receiving port 125. The second fuel hose 110b is a rubber hose similarly to the first fuel hose 110a.

  The fuel inlet 125 communicates with the inside of the throttle body 45 via the carburetor 46.

  As described above, the fuel supplied from the fuel tank passes through the first fuel hose 110a, the hose relay pipe 120, the second fuel hose 110b, and the fuel receiving port 125 in order, and is sent into the throttle body 45.

<< 3-2 >> Mounting Structure of Hose Relay Pipe 120 As shown in FIG. 5, the throttle body 45 includes a pipe fixing stay 130.

  The pipe fixing stay 130 is fixed to the right side surface of the throttle body 45. In this embodiment, the pipe fixing stay 130 is screwed to the right side surface of the throttle body 45, but may be connected by welding or may be integrally formed with the throttle body 45.

  The hose relay pipe 120 is fixed to the pipe fixing stay 130. In the present embodiment, the hose relay pipe 120 is welded to the right side surface of the pipe fixing stay 130, but may be screwed or may be integrally formed with the pipe fixing stay 130.

<< 3-3 >> Action / Effect The throttle body 45 according to the present embodiment includes a hose relay pipe 120, a pipe fixing stay 130, and a fuel receiving port 125. The fuel hose 110 is fixed by the hose relay pipe 120. The

  Therefore, since the fuel hose 110 is fixed to the hose relay pipe 120, the fuel hose 110 and the vehicle body frame (not shown) and other functional parts can be arranged so as not to interfere with each other.

  In addition, since the outer diameter of the hose relay pipe 120 is smaller than the outer diameter of the fuel hose 110, the hose relay pipe 120, a vehicle body frame (not shown) disposed near the hose relay pipe 120, and other functional parts Interference can be avoided.

  This is particularly effective because interference between the fuel hose 110 and other functional parts due to swinging during traveling can be reduced.

  Further, since the hose relay pipe 120 (metal pipe) is not directly connected to the fuel receiving port 125 but is connected via the second fuel hose (rubber hose), the metal material used is reduced and the cost is reduced. be able to.

<< 4-1 >> Form of Air Cleaner 40 As shown in FIG. 3, the upper rear portion of the air cleaner 40 according to the present embodiment is formed below the upper front portion of the air cleaner 40.

  A throttle body 45 is disposed above the upper rear portion of the air cleaner 40. As described in the description of FIG. 1, the throttle body 45 is disposed below the storage box 36.

<< 4-2 >> Action / Effect The rear upper surface of the air cleaner 40 according to the present embodiment is formed below the front upper surface of the air cleaner 40.

  Therefore, the position of the throttle body 45 disposed above the rear upper surface of the air cleaner 40 can be set downward. As a result, the capacity of the storage box 36 disposed above the throttle body 45 can be set large.

2. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. The difference between the first embodiment and the present embodiment is that an elastic body is inserted between the throttle body side mounting portion 101 and the intake manifold side mounting portion 102 and the intake manifold side bracket 100. Other configurations are the same as those in the first embodiment.

  As shown in FIG. 6, in this embodiment, an elastic body 103 is inserted between one end of the intake manifold side bracket 100 and the throttle body side mounting portion 101. An elastic body 104 is inserted between the intake manifold side bracket 100 and the intake manifold side mounting portion 102.

  Therefore, one end of the intake manifold side bracket 100 is screwed to the throttle body side mounting portion 101 provided in the throttle body 45 via the elastic body 103. The other end of the intake manifold side bracket 100 is screwed to an intake manifold side mounting portion 102 provided in the intake manifold 70 via an elastic body 104.

  The elastic body 103 and the elastic body 104 can be formed using a member that undergoes elastic deformation. As the elastic body 103 and the elastic body 104, for example, a rubber washer-type grommet can be used.

《Action ・ Effect》
The intake manifold side bracket 100 has a function of suppressing the shift of the connection portion between the delivery pipe 80 and the intake manifold 70 to a minute vibration that can be absorbed by the connecting band 90.

  Here, in the motorcycle 10 according to the present embodiment, the elastic body 103 is inserted between one end of the intake manifold side bracket 100 and the throttle body side mounting portion 101, and the other end of the intake manifold side bracket 100 and the intake air. An elastic body 104 is inserted between the manifold side mounting portion 102.

  Accordingly, the force that causes the connection portion between the intake manifold 70 and the delivery pipe 80 to shift is transmitted to the intake manifold side bracket 100 while being absorbed by the elastic body 103 and the elastic body 104. That is, since the elastic body 103 and the elastic body 104 are members that are elastically deformed, it is possible to avoid the displacement of the connection portion from being directly transmitted to the intake manifold side bracket 100. Therefore, the intake manifold side bracket 100 can more effectively suppress the displacement of the connection portion to the minute vibration.

  Further, as a result of avoiding that the force for shifting the connecting portion is directly transmitted to the intake manifold side bracket 100, the occurrence of metal fatigue in the intake manifold side bracket 100 can be suppressed.

3. Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. The difference between the present embodiment and the first embodiment is the attachment position of the connection bracket. Other configurations are the same as those in the first embodiment. Therefore, the description of the schematic configuration of the motorcycle 10, the configuration of the connecting band 90, the mounting structure of the fuel hose and the like, the form of the air cleaner 40, and the like is omitted.

<< 1-1 >> Fuel Cut Valve FIG. 7 is an enlarged left side view showing the air cleaner 40, the throttle body 45, and the engine 50 attached to the motorcycle 10 according to this embodiment.

  As shown in FIG. 7, the throttle body 45 according to the present embodiment is provided integrally with the carburetor 46. The carburetor 46 has a fuel cut valve 47. The fuel cut valve 47 is a valve that shuts off the fuel supply from the carburetor 46 to the engine 50 by shutting off the fuel passage when the engine 50 is in an over-rev (over-revolution: over-rotation) state.

  As the fuel cut valve 47, a general fuel cut valve such as a solenoid valve or a rotary valve can be used.

<< 2-1 >> Engine Side Bracket As shown in FIG. 7, the engine side bracket 200 according to the present embodiment connects the carburetor 46 and the engine 50. The engine side bracket 200 is formed in an L shape in plan view. FIG. 8 is a plan view of the engine side bracket 200. Such an engine side bracket 200 can be formed by processing a flat iron member into an L shape.

  The engine-side bracket 200 is preferably formed of a metal material having rigidity that can suppress displacement of a connection portion between the delivery pipe 80 and the intake manifold 70. Therefore, the engine-side bracket 200 is formed by a member having higher rigidity than the connection band 90. However, if the rigidity of the engine-side bracket 200 is too high, there is a possibility that the entire intake system may be twisted or displaced due to the suppression of the displacement of the connection portion. Therefore, the rigidity of the engine-side bracket 200 is sufficient to suppress the force for shifting the connecting portion to the minute vibration that can be absorbed by the connecting band 90. In the present embodiment, an iron bracket is used as such an engine side bracket 200.

<< 2-2 >> Attachment Position of Engine Side Bracket 200 Next, an attachment position of the engine side bracket 200 will be described.

  One end of the engine side bracket 200 is screwed to a fuel cut valve side mounting portion 201 that is disposed integrally with the carburetor 46. Further, the other end of the engine side bracket 200 is screwed to an engine side mounting portion 202 disposed integrally with the engine 50.

  The fuel cut valve side mounting portion 201 is disposed adjacent to the fuel cut valve 47 included in the carburetor 46. As shown in FIG. 7, one end of the engine side bracket 200 is screwed from the outside in the vehicle width direction of the fuel cut valve side mounting portion 201.

  Here, the engine 50 includes a cylinder head 51 and a cylinder head cover 52 attached to cover the front of the cylinder head 51. The engine side mounting portion 202 is provided integrally with the cylinder head cover 52. As shown in FIG. 7, the other end of the engine side bracket 200 is screwed from the front of the engine side mounting portion 202.

  The cylinder head cover 52 is attached to the cylinder head 51 at the engine side attachment portion 202. Therefore, the other end of the engine side bracket 200 and the cylinder head cover 52 are fastened by a single screw at the engine side mounting portion 202.

  The mounting method of the engine side bracket 200 is not limited to screwing, but may be welding or the like.

<< 2-3 >> Actions / Effects The motorcycle 10 according to the present embodiment includes a connection band 90 that tightens the outside of a connection portion between the intake manifold 70 and the delivery pipe 80, and an engine side bracket that connects the carburetor 46 and the engine 50. 200. The engine side bracket 200 is connected to a fuel cut valve side mounting portion 201 of the carburetor 46 and an engine side mounting portion 202 of the engine 50, and the fuel cut valve side mounting portion 201 is adjacent to the fuel cut valve 47. ing.

  Therefore, the fine vibration propagating through the intake manifold 70 and the delivery pipe 80 can be absorbed by the connecting band 90, and the displacement of the connection portion can be suppressed by the engine side bracket 200. That is, the engine-side bracket 200 can suppress the displacement of the connection portion that occurs with the swinging of the swing type power unit 30 to a fine vibration that can be absorbed by the connecting band 90. As a result, the connection portion between the delivery pipe 80 and the intake manifold 70 can be more reliably coupled.

  Further, since the fuel cut valve side mounting portion 201 is adjacent to the fuel cut valve 47, the engine side bracket 200 can particularly suppress vibration generated in the fuel cut valve 47. As a result, even if the vibration resistance performance of the fuel cut valve 47 is low, the function of the fuel cut valve 47 can be maintained.

  In the present embodiment, the engine side mounting portion 202 is provided integrally with the cylinder head cover 52 of the engine 50. The engine-side bracket 200 and the cylinder head cover 52 are attached to the cylinder head 51 with a single screw. Therefore, it is not necessary to separately form the engine side mounting portion 202, and the manufacturing cost of the vehicle body can be reduced and the vehicle body can be reduced in weight.

  Note that, when the air cleaner 40 and the carburetor 46 are disposed in front of the pivot portion 60 as in the motorcycle 10 according to the present embodiment, the swinging of these tends to increase. Even in such a motorcycle 10, the carburetor 46 and the intake manifold 70 can be reliably connected by including the connecting band 90 and the engine side bracket 200 according to the present embodiment.

4). Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG. The difference between the third embodiment and the present embodiment is that an elastic body is inserted between the fuel cut valve side mounting portion 201 and the engine side mounting portion 202 and the engine side bracket 200. Other configurations are the same as those of the third embodiment.

  As shown in FIG. 9, in this embodiment, an elastic body 203 is inserted between one end of the engine side bracket 200 and the fuel cut valve side mounting portion 201. An elastic body 204 is inserted between the engine side bracket 200 and the engine side mounting portion 202.

  Therefore, one end of the engine side bracket 200 is screwed to the fuel cut valve side mounting portion 201 provided in the carburetor 46 via the elastic body 203. The other end of the engine side bracket 200 is screwed to an engine side mounting portion 202 provided in the engine 50 via an elastic body 204.

  The elastic body 203 and the elastic body 204 can be formed using a member that undergoes elastic deformation. As the elastic body 203 and the elastic body 204, for example, a rubber washer-type grommet can be used.

《Action ・ Effect》
The engine-side bracket 200 has a function of suppressing the shift of the connection portion between the delivery pipe 80 and the intake manifold 70 to fine vibration that can be absorbed by the connecting band 90.

  Here, in the motorcycle 10 according to the present embodiment, the elastic body 203 is inserted between one end of the engine side bracket 200 and the fuel cut valve side mounting portion 201, and the other end of the engine side bracket 200 and the engine side. An elastic body 204 is inserted between the mounting portion 202.

  Accordingly, the force that causes the connection portion between the intake manifold 70 and the delivery pipe 80 to shift is transmitted to the engine side bracket 200 while being absorbed by the elastic body 203 and the elastic body 204. That is, since the elastic body 203 and the elastic body 204 are elastically deformed members, it is possible to avoid the displacement of the connection portion from being directly transmitted to the engine side bracket 200. Therefore, the engine-side bracket 200 can more effectively suppress the displacement of the connection portion from being caused by slight vibration. As a result, the function of the fuel cut valve 47 can be maintained more effectively.

  Moreover, as a result of avoiding that the displacement of the connecting portion is directly transmitted to the engine side bracket 200, occurrence of metal fatigue in the engine side bracket 200 can be suppressed.

<< Other Embodiments >>
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments will be apparent to those skilled in the art.

  For example, in the first embodiment, the intake manifold side bracket 100 having a convex shape downward is used, but as shown in FIG. 10, the intake manifold side bracket 100a having a convex shape upward is used. Also good. In this case, the first reference line α and the second reference line β are not parallel but intersect each other on the connecting band 90 side. Therefore, the intake manifold side bracket 100a has the same effect as the intake manifold side bracket 100.

  In the first embodiment, the intake manifold side bracket 100 having a curved portion is used. However, as shown in FIG. 11, an intake manifold side bracket 100b having a bent portion formed by bending may be used. . Also by the intake manifold side bracket 100b, it is possible to avoid the concentration of the force for shifting the connecting portion from being concentrated on a part. Therefore, the intake manifold side bracket 100b has the same effect as the intake manifold side bracket 100.

  In the first embodiment, the intake manifold side bracket 100 having a curved portion is used. However, as shown in FIG. 12, a flat intake manifold side bracket 100c may be used. Even in this case, since the intake manifold side bracket 100c is disposed along the connection band 90, it can be made to cooperate with the connection band 90.

  In the first embodiment, the shape of the intake manifold side bracket 100 is a strip shape having a curved portion, but each side surface of the intake manifold side bracket 100 may be circular or polygonal. Further, the shape of the intake manifold side bracket 100 may be a shape in which both ends in the longitudinal direction of the strip shape are twisted.

  In the first embodiment, the throttle body side mounting portion 101 and the intake manifold side mounting portion 102 are arranged so that the intake manifold side bracket 100 is along the upper side of the connection band 90. However, the throttle body side mounting portion 101 and As long as the intake manifold side mounting portion 102 is disposed at a position adjacent to both ends of the connection band 90, it may be on the side or below.

  Moreover, in the said 1st Embodiment, although the rubber band was used as the connection band 90, what is necessary is just the elastic member which has the rigidity which can clamp | tighten and connect a connection part from the outside.

  Moreover, in the said 1st Embodiment, although the steel bands were used as the 1st fastening band 91 and the 2nd fastening band 92, it should just be formed with the material which can fix the connection band 90 firmly. Further, different materials may be used for the first fastening band 91 and the second fastening band 92.

  Moreover, in the said embodiment, although the steel bracket was used as the intake manifold side bracket 100 and the engine side bracket 200, what is necessary is just the metal material which has the rigidity which can suppress the shift stress which arises in a connection part to a slight vibration.

  In the first embodiment, the throttle body 45 is described as being provided integrally with the carburetor. However, the throttle body 45 may be provided integrally with another fuel supply device such as fuel injection.

  In the first embodiment, the throttle body 45 has been described as delivering a mixture of fuel and air from the delivery pipe 80. However, a fuel supply device such as fuel injection is provided integrally with the intake manifold. If there is, gas (air, oxygen, etc.) to which no fuel is added is sent out from the delivery pipe 80.

  In the first embodiment, the second fuel hose 110b is used to connect the hose relay pipe and the fuel inlet 125. However, the second fuel hose 110b may not be used. Even in this case, the first fuel hose 110a can be prevented from interfering with other components.

  In the second embodiment, an elastic body is inserted between one end of the intake manifold side bracket 100 and the throttle body side mounting portion 101 and between the intake manifold side bracket 100 and the intake manifold side mounting portion 102. However, the effect of the present invention can be obtained as long as the elastic body is inserted into either one.

  The intake manifold side bracket 100 has been described in the first embodiment, and the engine side bracket 200 has been described in the third embodiment. However, as shown in FIG. Both the engine side bracket 200 may be provided. In this case, both effects of the intake manifold side bracket 100 and the engine side bracket 200 can be obtained.

  In the fourth embodiment, an elastic body is inserted between one end of the engine side bracket 200 and the fuel cut valve side mounting portion 201 and between the engine side bracket 200 and the engine side mounting portion 202. However, the effect can be obtained if the elastic body is inserted into either one.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

1 is a left side view of a motorcycle 10 according to an embodiment of the present invention. It is a left side enlarged view of swing type power unit 30 concerning this embodiment. It is a left side enlarged view of intake system parts concerning a 1st embodiment. FIG. 4 is an enlarged left side view of a connection portion between the intake manifold 70 and the delivery pipe 80 according to the first embodiment of the present invention. FIG. 3 is an enlarged right side view of the intake system component according to the first embodiment. It is a left side enlarged view of the intake system component which concerns on 2nd Embodiment of this invention. FIG. 10 is an enlarged left side view of a connection portion between an intake manifold 70 and a delivery pipe 80 according to a third embodiment of the present invention. It is a top view of the engine side bracket 200 which concerns on 3rd Embodiment of this invention. It is a left side enlarged view of the intake system component which concerns on 4th Embodiment of this invention. It is the left side enlarged view of the connection part of the intake manifold 70 which concerns on other embodiment of this invention, and the delivery pipe | tube 80 (the 1). It is the left side enlarged view of the connection part of the intake manifold 70 and delivery pipe 80 which concerns on other embodiment of this invention (the 2). It is the left side enlarged view of the connection part of the intake manifold 70 and delivery pipe 80 which concerns on other embodiment of this invention (the 3). It is the left side enlarged view of the connection part of the intake manifold 70 and delivery pipe 80 which concerns on other embodiment of this invention (the 4).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 20 ... Front wheel, 25 ... Rear wheel, 30 ... Swing type power unit, 35 ... Seat, 36 ... Storage box, 40 ... Air cleaner, 45 ... Throttle body, 46 ... Carburetor, 47 ... Fuel cut valve, 50 ... Engine, 51 ... Cylinder head, 52 ... Cylinder head cover, 55 ... Power transmission part, 60 ... Pivot part, 65 ... Supply pipe, 70 ... Intake manifold, 75 ... Intake port, 80 ... Delivery pipe, 90 ... Connection band, 91 DESCRIPTION OF SYMBOLS 1st clamping band, 92 ... 2nd clamping band, 100 ... Intake manifold side bracket, 100a ... Intake manifold side bracket, 100b ... Intake manifold side bracket, 100c ... Intake manifold side bracket, 101 ... Throttle body side attaching part 102: Intake manifold side mounting portion, DESCRIPTION OF SYMBOLS 03 ... Elastic body, 104 ... Elastic body, 110 ... Fuel hose, 110a ... 1st fuel hose, 110b ... 2nd fuel hose, 120 ... Hose relay pipe, 120a ... 1st fuel hose side edge part, 120b ... Throttle body side End portion, 125 ... Fuel receiving port, 130 ... Pipe fixing stay, 200 ... Engine side bracket, 201 ... Fuel cut valve side mounting portion, 202 ... Engine side mounting portion, 203 ... Elastic body, 204 ... Elastic body

Claims (23)

A straddle-type vehicle including a power unit in which an engine for generating power and a power transmission unit for transmitting the power are integrally formed, the power unit being supported to be swingable with respect to a vehicle body;
A throttle body that adjusts the flow rate of gas flowing out of the delivery pipe by opening and closing the throttle valve;
An intake manifold connected to the engine and the delivery pipe;
A coupling band for tightening the outside of the connection portion between the delivery pipe and the intake manifold;
An intake manifold side bracket connecting the throttle body and the intake manifold along the outer surface of the connection band;
The connection band is formed in an annular shape by an elastic member having a predetermined rigidity,
The intake manifold side bracket is formed of a member having higher rigidity than the connection band,
The throttle body has a throttle body side attachment portion to which one end of the intake manifold side bracket is attached,
The straddle-type vehicle, wherein the intake manifold has an intake manifold side attachment portion to which the other end of the intake manifold side bracket is attached. The throttle body side mounting portion is adjacent to the throttle body side end of the coupling band,
The straddle-type vehicle according to claim 1, wherein the intake manifold side mounting portion is adjacent to an end of the connection band on the intake manifold side. The outer surface of the connecting band is
A first tightening band disposed near the throttle body;
2. The straddle-type vehicle according to claim 1, wherein the straddle-type vehicle is fastened by a second fastening band that is adjacent to the first fastening band and disposed closer to the engine than the first fastening band. . A first reference line along a direction in which one end of the intake manifold side bracket is attached to and detached from the throttle body side attaching portion, and a direction in which the other end of the intake manifold side bracket is attached to and detached from the intake manifold side attaching portion. The straddle-type vehicle according to claim 1, wherein the second reference line along the line intersects.   The straddle-type vehicle according to claim 4, wherein the first reference line and the second reference line intersect at an acute angle on the opposite side of the connection band.   The straddle-type vehicle according to claim 1, wherein the intake manifold side bracket has a curved portion formed by being curved.   The straddle-type vehicle according to claim 1, wherein the intake manifold side bracket has a bent portion formed by bending.   The straddle-type vehicle according to claim 1, wherein the intake manifold side bracket is made of a metal material.   The straddle-type vehicle according to claim 1, wherein an elastic body is inserted between one end of the intake manifold side bracket and the throttle body side mounting portion.   The straddle-type vehicle according to claim 1, wherein an elastic body is inserted between the other end of the intake manifold side bracket and the intake manifold side mounting portion.   The straddle-type vehicle according to claim 1, wherein the throttle body is provided integrally with a carburetor. An engine side bracket connecting the carburetor and the engine;
The engine side bracket is formed by a member having a higher rigidity than the connection band,
The carburetor has a fuel cut valve that cuts off fuel supply under a predetermined condition, and a fuel cut valve side mounting portion to which one end of the engine side bracket is mounted,
The engine has an engine side mounting portion to which the other end of the engine side bracket is mounted;
The straddle-type vehicle according to claim 11, wherein the fuel cut valve side mounting portion is adjacent to the fuel cut valve.   The straddle-type vehicle according to claim 12, wherein an elastic body is inserted between one end of the engine side bracket and the fuel cut valve side mounting portion.   The straddle-type vehicle according to claim 12, wherein an elastic body is inserted between the other end of the engine side bracket and the engine side mounting portion. The engine further includes a cylinder head and a cylinder head cover attached to the cylinder head,
The engine side mounting portion is provided integrally with the cylinder head cover,
The straddle-type vehicle according to claim 12, wherein the cylinder head cover is attached to the cylinder head at the engine side attachment portion. A straddle-type vehicle including a power unit in which an engine that generates power and a power transmission unit that transmits the power are integrally formed, and the power unit is supported to be swingable with respect to a vehicle body;
A throttle body that is integrated with the carburetor and adjusts the flow rate of gas flowing out of the delivery pipe by opening and closing the throttle valve;
An intake manifold connected to the engine and the delivery pipe;
A coupling band for tightening the outside of the connection portion between the delivery pipe and the intake manifold;
An engine side bracket for connecting the carburetor and the engine;
The connection band is formed in an annular shape by an elastic member having a predetermined rigidity,
The engine side bracket is formed by a member having a higher rigidity than the connection band,
The carburetor has a fuel cut valve that cuts off fuel supply under a predetermined condition, and a fuel cut valve side mounting portion to which one end of the engine side bracket is mounted,
The engine has an engine side mounting portion to which the other end of the engine side bracket is mounted;
The straddle-type vehicle, wherein the fuel cut valve side mounting portion is adjacent to the fuel cut valve.   The straddle-type vehicle according to claim 16, wherein an elastic body is inserted between one end of the engine side bracket and the fuel cut valve side mounting portion.   The straddle-type vehicle according to claim 16, wherein an elastic body is inserted between the other end of the engine side bracket and the engine side mounting portion. The engine further includes a cylinder head and a cylinder head cover attached to the cylinder head,
The engine side mounting portion is provided integrally with the cylinder head cover,
The straddle-type vehicle according to claim 16, wherein the cylinder head cover is attached to the cylinder head at the engine side attachment portion. A first fuel hose for sending fuel to be supplied to the throttle body;
The throttle body is
A fuel inlet into which the fuel flows;
A first fuel hose side end to which the first fuel hose is connected, and a hose relay pipe formed with a throttle body side end communicating with the fuel receiving port;
The straddle-type vehicle according to claim 1 or 16, further comprising a pipe fixing stay for fixing the hose relay pipe.   21. The straddle-type vehicle according to claim 20, further comprising a second fuel hose connected to the throttle body side end of the hose relay pipe and a fuel receiving port of the throttle body.   The straddle-type vehicle according to claim 21, wherein an outer diameter of the hose relay pipe is smaller than outer diameters of the first fuel hose and the second fuel hose. An air cleaner for purifying the air supplied to the throttle body;
The power unit has a pivot portion that is swingably supported by the body frame,
The straddle-type vehicle according to claim 1 or 16, wherein the air cleaner and the throttle body are disposed in front of the pivot portion.

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