JP4021310B2 - Throttle body device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a valve shaft that traverses the intake passage is rotatably supported on a body having an intake passage, and a control box that houses a control unit for controlling operation of the engine is attached to the body in the intake passage. The present invention relates to an improvement of a throttle body device in which a throttle valve for controlling an intake amount is fixed to a valve shaft, and a throttle drum is fixed to one end portion of the valve shaft outside the body.
[0002]
[Prior art]
Such a throttle body device is already known, for example, from Patent Document 1 below.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-294216
[Problems to be solved by the invention]
However, in the above-mentioned conventional device, there is no consideration for preventing the lead wire led out from the control box from interfering with the throttle drum, and it must be wired at a position separated from the throttle drum. It is difficult to secure a wiring space when the unit is assembled to the throttle body device.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a throttle body device that is compactly arranged as a whole while preventing the control unit lead wires from interfering with the throttle drum.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that a valve shaft traversing the intake passage is rotatably supported on a body having an intake passage, and a control unit for controlling operation of the engine is accommodated. control box is attached, wherein the said valve shaft in the intake canal is fixed throttle valve for controlling the intake air amount, a throttle drum is secured to one end of the valve shaft in the outside of the body, on the throttle drum Is a throttle body device that constitutes a throttle cable together with an outer cable, and is connected to the body on the opposite side of the throttle drum in the throttle body device that is connected to one end of the inner cable drawn from one end of the outer cable. A conductive wire to be connected to the control unit is connected to the box from the throttle drum side. Guard member having a partition plate portion to be interposed between the conductor and the throttle drum is mounted on the body, in its guard member, that the cable support portion for positioning and supporting one end of the outer cable is formed integrally Features.
[0007]
According to the configuration of the invention described in claim 1, the partition plate portion interposed between the lead wire connected from the throttle drum side to the control box attached to the body on the side opposite to the throttle drum and the throttle drum. Since the guard member having the above is attached to the body, the conductor connected to the control box can be wired as close as possible to the body side while reliably preventing the conductor from interfering with the throttle drum. Wiring space can be easily secured in the vicinity, and the whole including the conductor near the body can be compactly gathered.
[0008]
In addition, since the cable support portion for positioning and supporting one end portion of the outer cable of the throttle cable is formed integrally with the guard member, it is not necessary to provide a special support member dedicated to the throttle cable , thereby reducing the number of parts. Can do.
[0009]
Furthermore, in the invention according to claim 2 , in addition to the configuration of the invention according to claim 1 , a coupler portion to which an external coupler connected to the conducting wire can be removably attached faces the throttle drum in the control box. It is provided integrally, and the partition plate portion is formed to extend in a plate shape along the mounting direction of the external coupler with respect to the coupler portion. According to such a configuration, the external coupler with respect to the coupler portion is formed. It is possible to guide the external coupler with the partition plate during the attaching / detaching operation, and the attaching / detaching operation of the external coupler becomes easy and the maintainability is improved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.
[0011]
1 to 9 show an embodiment of the present invention, FIG. 1 is a side view of a scooter type motorcycle, FIG. 2 is a view taken along arrow 2 in FIG. 1 with a vehicle body cover omitted, and FIG. 2 is an enlarged view of the main part of FIG. 2, FIG. 5 is a side view of the throttle body device viewed from the direction of the arrow 5 in FIG. 4, and FIG. 6 is a transverse plan view of the throttle body device. 7 is a partially cutaway side view of the fuel hose, FIG. 8 is an enlarged longitudinal side view showing an attachment portion of the fuel injection valve to the intake pipe, and FIG. 9 is a view taken in the direction of arrow 9 in FIG.
[0012]
1 and 2, a body frame 11 of a scooter type motorcycle, which is a small vehicle, includes a down tube 14 that extends rearward and downward from a head pipe 13 that supports a front fork 12 that pivotally supports a front wheel WF. The upper tube 15 extends downward from the upper portion of the down tube 14 with a gentler inclination angle than the down tube 14, and the front end is connected to the rear end portion of the upper tube 15 to extend rearward and the rear end. A pair of left and right rear tubes 16 and 16 connected to each other, and a front end connected to a lower end portion of the down tube 14 and a rear end connected to an intermediate portion of the rear tubes 16 and 16 A pair of lower tubes 17 and 17 are provided, and both the lower tubes 17 and 17 are bent into a substantially U shape opened upward in a side view. To have.
[0013]
A single-cylinder engine E disposed in front of the rear wheel WR with the cylinder axis inclined forwardly upward and an output of the engine E are continuously variable at the intermediate portion of the vehicle body frame 11 in the front-rear direction. A front part of a power unit P constituted by a continuously variable transmission M for transmission to WR is supported so as to be able to swing up and down, and the rear wheel WR is pivotally supported on the rear part of the power unit P. A rear cushion unit 20 is provided between the rear end portion and the power unit P.
[0014]
Referring also to FIG. 3, upper brackets 21 are fixed to the connecting portions of the rear tubes 16 and 16 and the lower tubes 17 and 17, respectively. On the other hand, a pair of left and right lower brackets 23 are fixed to the upper portion of the crankcase 22 in the engine E, and the lower brackets are supported at the swing support point SP of the engine hanger 24 whose both ends are connected to the upper brackets 21. 23 are supported so as to be swingable. That is, the upper part of the crankcase 22 in the engine E, which is the front part of the power unit P, is supported on the vehicle body frame 11 so as to be swingable.
[0015]
Referring also to FIG. 4, an air cleaner 25 supported by the continuously variable transmission M is disposed on the left side of the rear wheel WR and above the continuously variable transmission M. The air cleaner 25 purifies the air. The air is connected to a throttle body device 27 via a connecting pipe 26, and the throttle body device 27 is connected to an upstream end of an intake pipe 29 bent in a substantially U shape via a rubber elastic coupling cylinder 28. The downstream end of the intake pipe 29 is connected to the cylinder head 30 so as to communicate with an intake port 31 provided in the cylinder head 30 at a substantially central position along the left-right direction of the engine E.
[0016]
In addition, a lower portion of a fuel injection valve 32 that injects fuel toward the intake port 31 is fitted to the upper portion of the intake pipe 29, and a fuel joint that is fastened to the intake pipe 29 so as to communicate with the fuel injection valve 32. A fuel injection valve 32 is sandwiched between 33 and the intake pipe 29.
[0017]
5 and 6, the throttle body device 27 crosses the intake passage 35 having a body 36 having an intake passage 35 connected to the intake port 31 of the cylinder head 30 in the engine E and a substantially horizontal axis. And a butterfly throttle valve 38 fixed to the valve shaft 37 in the intake passage 35 so as to adjust the amount of intake air flowing through the intake passage 35. And a throttle drum 39 fixed to one end portion of the valve shaft 37 outside the body 36.
[0018]
The throttle drum 39 is disposed on the right side of the body 36 in a state of facing forward in the traveling direction of the motorcycle. Between the throttle drum 39 and the body 36, the throttle valve 38 is biased toward the closing side. A return spring 40 is provided. The rider of the motorcycle pulls and operates the throttle cable 41 wound and connected to the throttle drum 39 against the spring force of the return spring 40, thereby opening the throttle valve 38. It is rotated to the side.
[0019]
On the opposite side of the body 36 from the throttle drum 39, that is, on the left side, a control box 43 that houses a control unit 42 for controlling the operation of the engine E such as the fuel injection amount of the fuel injection valve 32 and the ignition timing is attached. It is done.
[0020]
The control box 43 includes a box body 44 and a cover 45 fastened to the body 36 together with the box body 44 so as to seal the opening of the box body 44. The control unit 42 includes a control box 42 An electronic circuit (not shown) is formed on a circuit board 46 that is accommodated and fixed in 43.
[0021]
A throttle sensor 47 connected to one end of the valve shaft 37 so as to detect the opening degree of the throttle valve 38 is connected to the circuit board 46, and in the intake passage 35 upstream of the throttle valve 38. An intake air temperature sensor 48 for detecting the intake air temperature is connected, and although not shown, an intake air pressure sensor for detecting a negative pressure in the intake passage 35 downstream of the throttle valve 38 as an intake air pressure is also connected to the circuit board 46. It is connected.
[0022]
A coupler portion 49 is integrally provided on the upper portion of the box body 44 of the control box 43 so as to straddle the upper portion of the body 36 and face the throttle drum 39, and a plurality of conductors to be connected to the control unit 42. .. Are attached to the coupler portion 49 so as to be detachable from the throttle drum 39 side. Thus, each of the conductive wires 51 is collected as a harness 52, and the harness 52 extends forward from the external coupler 50 attached to the coupler portion 49 as shown in FIG. Invert to the shape.
[0023]
A guard member 53 having a partition plate portion 53 a interposed between the lead wires 51... Connected to the external coupler 50 and the throttle drum 39 is attached to the body 36. The partition plate portion 53a is formed so as to extend in a plate shape along the mounting direction of the external coupler 50 with respect to the coupler portion 49, and the state where the throttle cable 41 is wound around the throttle drum 39 on the partition plate portion 53a. A viewing window 54 is provided for viewing the camera from above.
[0024]
By the way, the throttle cable 41 includes an outer cable 55 and an inner cable 56 that is movably inserted into the outer cable 55, and one end portion of the inner cable 56 drawn from one end of the outer cable 55 is the throttle drum 39. A cable support 53 b for positioning and supporting one end of the outer cable 55 is integrally formed on the guard member 53.
[0025]
The cable support 53b is provided with a notch 64, and a support cylinder 58 having a male screw 57 on the outer periphery is inserted into the notch 64, and a pair of nuts that are screwed into the male screw 57 from both sides of the cable support 53b. By tightening 59 and 60, the support cylinder 58 is fixed to the cable support 53b. One end portion of the outer cable 55 is supported on the outer end portion of the support cylinder 58, and one end portion of the inner cable 56 that is drawn out from one end of the outer cable 55 and movably penetrates the support cylinder 58 extends to the throttle drum 39 side. Is issued.
[0026]
Such a throttle cable 41 is extended forward from the cable support portion 53b. In a portion corresponding to the throttle body device 27, the throttle cable 41 and a conductor connected to the control unit 42 are provided. 51 ... are arranged so as to extend in opposite directions.
[0027]
The guard member 53 is positioned on the body 36 of the throttle body device 27 by positioning pins 61 and fastened to the body 36 by a single screw member 62. Moreover, the screw member 62 is disposed at a position where the guard member 53 is fastened to the body 36 on the side opposite to the partition plate portion 53a with respect to the portion of the throttle cable 41 disposed between the cable support portion 53b and the throttle drum 39, The positioning pin 61 is provided between the body 36 and the guard member 53 between the screw member 62 and the throttle drum 39.
[0028]
According to such an arrangement of the positioning pin 61 and the screw member 62, the external force acting on the partition plate portion 53a when the external coupler 50 is attached to and detached from the coupler portion 49, and the cable support from the outer cable 55 of the throttle cable 41 are supported. The direction of the force exerted on the guard member 53 by the reaction force acting on the portion 53 b is the clockwise direction of FIG. 4, that is, the tightening direction of the screw member 62 around the axis of the screw member 62. Therefore, even if there is a slight backlash between the positioning pin 61 and the body 36 or the guard member 53, the screw member 62 does not loosen, while the minimum number of single screw members 62 prevents looseness. The guard member 53 can be fastened to the body 36.
[0029]
The throttle body device 27 configured as described above is disposed in front of the swing support point SP that swings and supports the upper portion of the crankcase 22 in the engine E of the power unit P on the vehicle body frame 11. A cell motor 63 (see FIG. 3) is disposed above the crankcase 22 so as to be located behind the swing support point SP. Further, the bottom 43a of the control box 43 in the throttle body device 27 is formed substantially flat so as to face the engine E from above.
[0030]
By the way, a fuel tank 68 is mounted in a portion surrounded by the down tube 14, the upper tube 15, and the lower tubes 17, 17 in the front portion of the vehicle body frame 11. The vehicle body frame 11, a part of the power unit P, and the fuel tank 68 are covered with a synthetic resin vehicle body cover 69. The vehicle body cover 69 includes a front cover 70 that covers the front portion of the vehicle body frame 11, and the A pair of left and right leg shields 71 connected to both sides of the front cover 70, a pair of left and right step floors 72 connected to the lower ends of the leg shields 71, and the step floors 72 are raised upward and fuel. A vehicle body frame connected to the floor tunnel portion 73 covering the tank 68, the skirt portion 74 hanging downward from the outer edges of the step floors 72, the skirt portion 74, the step floor 72, and the floor tunnel portion 73. 11 and a rear cover 75 covering the rear part.
[0031]
A tandem seat 76 is arranged on the rear cover 75 so as to be supported by the rear tubes 16 and 16.
[0032]
The fuel tank 68 incorporates a strainer 77 and a fuel pump 78 that sucks up the fuel in the fuel tank 68 via the strainer 77, and the other end of a fuel hose 79 connected to the fuel pump 78 at one end. Is connected to the fuel injection valve 32 via the fuel joint 33.
[0033]
Thus, the fuel pump 78 is built in the fuel tank 68 mounted on the front portion of the vehicle body frame 11 at a position separated from the engine E, and the fuel pump 78 is not attached to the power unit P. It is possible to reduce the size of the power unit P and improve the assemblability of the power unit P.
[0034]
A first clamper 80 that holds an intermediate portion of the fuel hose 79 is fixed to the vehicle body frame 11. In this embodiment, the motorcycle is directed forward in the traveling direction of the motorcycle among the pair of left and right rear tubes 16,16. In this state, the first clamper 80 is fastened to the support plate 81 provided at the front portion of the rear tube 16 located on the left side. Moreover, the fuel hose 79 is bent between the fuel injection valve 32 and the first clamper 80 on the right side of the vehicle body frame 11, and the second clamper 82 that grips the portion of the fuel hose 79 near the engine E is the fuel. It is fixed to the engine E side by being fastened to the hose stay 83.
[0035]
Thus, the first clamper 80 that holds the intermediate portion of the fuel hose 79 is fixed to the vehicle body frame 11, and the fuel hose 79 is positioned between the fuel injection valve 32 attached to the engine E and the first clamper 80 on the right side of the vehicle body frame 11. As the power unit P swings up and down, the portion of the fuel hose 79 between the first clamper 80 and the engine E is twisted. The bending of the fuel hose 79 due to the rocking can be avoided, and the strength of the fuel hose 79 against twisting is higher than the strength against bending, so that the durability of the fuel hose 79 is higher than that of bending deformation. Can be improved.
[0036]
In addition, a second clamper 82 that holds a portion of the fuel hose 79 near the engine E is fixed to the engine E side, and the fuel hose 79 bends to the right side of the vehicle body frame 11 between the first and second clampers 80 and 82. Therefore, the second clamper 82 can improve the accuracy of the bending arrangement of the fuel hose 79 on the right side of the vehicle body frame 11 and the fuel hose 79 at the connection portion of the fuel hose 79 to the fuel injection valve 32. It is possible to prevent the bending deformation from occurring in 79.
[0037]
In FIG. 7, the fuel hose 79 includes an inner layer portion 79a made of, for example, fluorine-based rubber, an intermediate layer portion 79b formed of nitrile rubber and covering the inner layer portion 79a, and a mesh portion made of polyester and covering the intermediate layer portion 79b. 79c and a multilayer high-pressure type composed of an outermost layer portion 79d made of hydrin rubber. One end of the fuel hose 79 is joined to a connector 84 connected to the fuel pump 78, and the joining of the fuel hose 79 to the connector 84 is maintained by the first clip 85. The other end of the fuel hose 79 is joined to the fuel joint 33 connected to the fuel injection valve 32, and the joining of the fuel hose 79 to the fuel joint 33 is maintained by the second clip 86.
[0038]
By configuring the fuel hose 79 as a multilayer high-pressure type in this way, it is possible to increase the strength of the fuel hose 79 and contribute to improving the durability of the fuel hose 79 that guides high-pressure fuel.
[0039]
By the way, the fuel hose 79 is covered with a protector hose 87 made of, for example, ethylene propylene rubber, and the fuel hose 79 connected to the fuel joint 33 with the second clip 86 is inserted into the protector hose 87 from one end side thereof. Then, one end of the fuel hose 79 protruding from the protector hose 87 is connected to the connector 84 by the first clip 85.
[0040]
The first clamper 80 has a mounting portion 89 integrally connected to a cylindrical portion 88, and the cylindrical portion 88 is a cylinder having flanges 90a and 90a that are in contact with both ends of the cylindrical portion 88 at both ends. A buffer rubber 90 is attached so as to penetrate the cylindrical portion 88. Thus, when the protector hose 87 covering the fuel hose 79 is inserted into the buffer rubber 90, the fuel hose 79 is held by the first clamper 80, and is provided on the mounting plate 89. A bolt 92 for fastening the first clamper 80 to the vehicle body frame 11 is inserted into the insertion hole 91.
[0041]
The second clamper 82 has the same configuration as the first clamper 80, and the fuel hose 79 is held by the second clamper 82 via the shock absorbing rubber 90 and the protector hose 87, and the second clamper 82 is secured by the bolt 93. Is fastened to the fuel hose stay 83.
[0042]
Moreover, the first and second clampers 80 and 82 are arranged separately on the left and right sides of the vehicle body center line BC extending in the front-rear direction, and the fuel hose 79 and the protector hose 87 between the first and second clampers 80 and 82 are Both of the clampers 80 and 82 are arranged so as to extend to the right side in the state in which the body frame 11 faces the same side in the left-right direction, in this embodiment, the front in the traveling direction of the motorcycle. That is, the fuel hose 79 between the first and second clampers 80 and 82 is bent and disposed so as to swell to the right side of the vehicle body frame 11. Accordingly, it is possible to set the length between the first and second clampers 80 and 82 relatively long in the fuel hose 79, thereby more reliably suppressing the bending load on the fuel hose 79. The durability of 79 can be further improved.
[0043]
The engine E is supported by the vehicle body frame 11 such that the substantially center position in the left-right direction, that is, the arrangement position of the fuel injection valve 32 is offset from the vehicle body center line BC to the same side as the first clamper 80, that is, the left side. Such an arrangement is advantageous for securing the swing length of the fuel hose 79.
[0044]
In FIG. 8, the intake pipe 29 is formed so as to bend in a substantially C shape so as to connect the throttle body device 27 and the cylinder head 30 below the throttle body device 27. The downstream end of the elastic coupling cylinder 28 whose upstream end is tightly fitted to the downstream connection pipe portion 36 a provided in the body 36 of the device 27 is tightly fitted to the upstream end of the intake pipe 29, and the elastic coupling cylinder 28. Are connected to the body 36 and the intake pipe 29 by the tightening of the third clamper 94 surrounding the elastic coupling cylinder 28. That is, the body 36 in the throttle body device 27 is connected to the cylinder head 30 via the elastic coupling cylinder 28 and the intake pipe 29.
[0045]
Referring also to FIG. 9, a fuel injection valve 32 for injecting fuel toward the intake port 31 of the cylinder head 30 is attached to the intake pipe 29, and the opening and closing operation of the fuel injection valve 32 is performed by the throttle body. It is controlled by a control unit 42 housed and fixed in a control box 43 attached to the body 36 of the device 27. Thus, an external coupler 95 connected to the harness 52a branched from the harness 52 in which the conducting wires 51 connected to the control unit 42 are bundled is attached to the coupler portion 32a provided in the fuel injection valve 32.
[0046]
The intake pipe 29 is provided with a mounting hole 96 that opens toward the cylinder head 30, and the front end of the fuel injection valve 32 is fitted into the mounting hole 96 in an airtight manner so that the front end faces the intake pipe 29. Combined. Further, the head of the fuel injection valve 32 is integrally formed with a connecting pipe portion 33a to which a fuel hose 79 is connected, and is formed of a synthetic resin so that the connecting pipe portion 33a is communicated with the fuel injection valve 32. The fuel joint 33 is fitted in a liquid-tight manner.
[0047]
Moreover, the fuel joint 33 is provided with a locking recess 97 that engages with an engagement protrusion 32b provided on the fuel injection valve 32, and the engagement protrusion 32b is engaged with the locking recess 97. By fitting the fuel joint 33 to the head of the fuel injection valve 32, the circumferential position of the fuel injection valve 32 with respect to the connecting pipe portion 33a is fixed.
[0048]
The fuel hose stay 83 is formed so as to extend along a fuel hose 79 connected to the connecting pipe portion 33a of the fuel joint 33, and one end of the fuel hose stay 83 has a plurality of, for example, a pair of bolts 98, By fastening together with 98, the fuel joint 33 and the intake pipe 29 are fastened together. In other words, the fuel hose stay 83 is interposed between a boss portion 29a that is integrally provided on the intake pipe 29 so as to extend in parallel with the fuel injection valve 32 having a tip portion fitted in the mounting hole 96, and the one end portion of the fuel hose stay 83. As described above, the fuel joint 33 is integrally provided with a support portion 33b, and a pair of metal collars 99, 99 are mold-coupled to the support portion 33. Thus, bolts 98, 98 inserted into one end of the fuel hose stay 83 and both the collars 99, 99 are screwed into the boss 29a, but between the support 33b and the boss 29a. The clip 101 that engages with the engagement groove 100 provided on the outer periphery of the fuel injection valve 32 and determines the axial position of the fuel injection valve 32 is sandwiched.
[0049]
By the way, the support portion 33b is provided integrally with the fuel joint 33 so as to extend away from the coupler portion 32 of the fuel injection valve 32 at a position shifted in the circumferential direction from the connection pipe portion 33a. In addition, by determining the fastening position of the fuel joint 33 to the intake pipe 29 as described above, it is possible to increase the degree of freedom in arrangement of the lead wire connecting portion to the fuel injection valve 32 and the connecting portion of the fuel hose 79.
[0050]
As described above, one end portions of the fuel joint 33 and the fuel hose stay 83 are fastened together with the intake pipe 29, whereby the circumferential position of the fuel injection valve 32 with respect to the connection pipe portion 33a of the fuel joint 33 is fixed. At the same time, the fuel injection valve 32 is sandwiched between the fuel joint 33 and the intake pipe 29 so that the position of the fuel injection valve 32 with respect to the intake port 31 of the cylinder head 30 is fixed.
[0051]
Of the both sides of the fuel hose stay 83, the side opposite to the fuel injection valve 32 is interposed between the harness 52 connected to the control unit 42 of the throttle body device 27 and the engine E, whereby the harness 52 In addition, a heat shielding wall 83a for preventing adverse effects due to radiant heat from the engine E is provided at a substantially right angle and integrally therewith.
[0052]
A second clamper 82 that supports the fuel hose 79 is fastened to the other end of the fuel hose stay 83 with a bolt 83, and the fuel hose 79 is supported on the other end of the fuel hose stay 83.
[0053]
Next, the operation of this embodiment will be described. A fuel joint 33 having a connecting pipe portion 33a to which a fuel hose 79 for guiding fuel to the fuel injection valve 32 is connected is arranged in the circumferential direction of the fuel injection valve 32 with respect to the connecting pipe portion 33a. The fuel joint is fixed in a liquid-tight manner to the head of the fuel injection valve 32 with a fixed position, and the fuel injection valve 32 is sandwiched between the intake pipe 29 while the position relative to the intake port 31 is fixed. Since 33 is fastened to the intake pipe 29, the relative position of the fuel injection valve with respect to the intake port 31 and the position of the fuel hose 79 with respect to the fuel injection valve 32 are fixed by fastening the fuel joint 33 to the intake pipe 29. The fuel injection valve 32 can be attached to the intake pipe 29, and the fuel injection valve 32 and the fuel hose 79 are attached when fuel is supplied to the single-cylinder engine E. Lai is improved.
[0054]
Further, one end of the fuel hose stay 83 is fastened to the intake pipe 29 by being fastened together with the fuel joint 33 by a pair of bolts 98, 98, and the fuel hose 79 is supported on the other end of the fuel hose stay 83. The vibration of the fuel hose 79 can be reduced while avoiding an increase in the number of parts. Moreover, the fuel hose stay 83 is formed so as to extend along the fuel hose 79 connected to the connecting pipe portion 33a of the fuel joint 33, so that the fuel hose 79 does not interfere with the coupler portion 32a of the fuel injection valve 32. The fuel hose 79 can be held, and the degree of freedom in arrangement of the coupler portion 32a can be increased.
[0055]
Further, the front part of the power unit P including the engine E is swingable up and down and is supported on the vehicle body frame 11. A fuel hose 79 is connected to a fuel tank 68 mounted on the vehicle body frame 11 via a fuel pump 78. Therefore, the fuel hose 79 can be swung together with the power unit P, and the fuel injection valve 32 can be easily attached to the scooter type motorcycle mounted on the vehicle body frame 11 so that the engine E is swung. .
[0056]
In addition, a throttle drum 39 is fixed to one end of the valve shaft 37 of the throttle body device 27, but the control box 43 attached to the body 36 on the opposite side of the throttle drum 39 is connected to the control box 43. Conductive wires 51 to be connected to the control unit 42 to be accommodated are connected from the throttle drum 39 side, and a guard member 53 having a partition plate portion 53a interposed between the conductive wires 51 and the throttle drum 39 is provided on the body 36. Installed.
[0057]
Therefore, the conductors 51 connected to the control box 43 can be wired as close as possible to the body 36 while reliably preventing interference with the throttle drum 39. Space can be easily secured and the entire throttle body device 27 including the conductive wires 51 in the vicinity of the body 36 can be compactly gathered.
[0058]
In addition, since the cable support portion 53b for positioning and supporting one end portion of the outer cable 55 in the throttle cable 41 is formed integrally with the guard member 53, it is not necessary to provide a special support member dedicated to the throttle cable 41, thereby reducing the number of parts. Can be reduced.
[0059]
Further, the control box 43 is integrally provided with a coupler portion 49 that can be detachably attached to the external coupler 50 connected to the conductors 51... And the partition plate portion 53 a of the guard member 53 is provided with the coupler portion 49. Therefore, the external coupler 50 can be guided by the partition plate portion 53a when the external coupler 50 is attached to or detached from the coupler portion 49. The attachment / detachment operation of the coupler 50 is facilitated, and the maintainability can be improved.
[0060]
Further, the air cleaner 25 supported by the continuously variable transmission M in the power unit P is connected to the cylinder head 30 of the engine E through the throttle body device 27 and the intake pipe 29. The body 36 of the throttle body device 27 is The throttle body device 27 is connected to the intake pipe 29 connected to the cylinder head 30 via the elastic coupling cylinder 28, and the control unit 42 for operation control of the engine E is assembled to the body 36. The engine E is disposed in front of the swing support point SP for the body frame 11 above the crankcase 22.
[0061]
Therefore, by absorbing the vibration acting on the throttle body device 27 from the engine E by the elastic coupling cylinder 28, the vibration reaching the control unit 42 assembled to the throttle body device 27 can be reduced, and the swing support point Since the throttle body device 27 is disposed in front of the SP, the distance between the cylinder head 30 and the throttle body device 27 is shortened as much as possible, and the load acting on the elastic coupling cylinder 28 interposed between the throttle body device 27 and the cylinder head 30 is reduced. can do.
[0062]
In addition, a control unit 42 is disposed outside the body 36 corresponding to the end of the valve shaft 37 whose axis is substantially horizontal in the throttle body device 27, and the control unit 42 is accommodated and attached to the body 36. 43 is formed so as to face the engine E from above, so that the volume of the control box 43 can be set as large as possible, and the bottom 43a of the control box 43 is made flat. This improves usability.
[0063]
Further, since the cell motor 63 is disposed on the crankcase 22 behind the swing support point SP, the control unit 42 and the cell motor 63 are kept as far as possible from the grounded road surface of the scooter type motorcycle, so that water from the road surface can be obtained. It is possible to prevent the adverse effects due to rebounding from reaching the control unit 42 and the cell motor 63 as much as possible, and by arranging the control unit 42 and the cell motor 63 on both sides before and after the swing support point SP, noise from the cell motor 63 can be reduced. 42 can be prevented from reaching as much as possible.
[0064]
Further, a throttle cable 41 wound around and connected to a throttle drum 39 fixed to the valve shaft 37 on the side opposite to the control unit 42 and a conductor 51 connected to the control unit 42 correspond to the throttle body device 27. Are arranged so as to extend in directions opposite to each other, so that at the time of maintenance of any one of the throttle cable 41 and the conductors 51..., The other of the throttle cable 41 and the conductors 51. The maintainability of the throttle cable 41 and the conducting wires 53 can be improved.
[0065]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.
[0066]
For example, the present invention can also be applied to a motorcycle other than a scooter type motorcycle and a motor tricycle.
[0067]
【The invention's effect】
As described above, according to the present invention, the guard member having the partition plate portion interposed between the lead wire connected from the throttle drum side to the control box attached to the body on the side opposite to the throttle drum and the throttle drum is provided. Since it is attached to the body, the conductor connected to the control box can be wired as close as possible to the body side while reliably preventing the conductor from interfering with the throttle drum, and wiring space is provided in the vicinity of the body. It can be easily secured and the entire body including the conductors in the vicinity of the body can be gathered compactly.
[0068]
In addition, since the cable support portion for positioning and supporting one end portion of the outer cable of the throttle cable is formed integrally with the guard member, it is not necessary to provide a special support member dedicated to the throttle cable , thereby reducing the number of parts. Can do.
[0069]
Furthermore, according to the second aspect of the invention, it is possible to guide the external coupler with the partition plate portion when the external coupler is attached to or detached from the coupler portion, the attachment / detachment operation of the external coupler is facilitated, and the maintainability is improved.
[Brief description of the drawings]
FIG. 1 is a side view of a scooter type motorcycle.
FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1 with the vehicle body cover omitted.
FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2;
4 is an enlarged view of a main part of FIG.
5 is a side view of the throttle body device as seen from the direction of arrow 5 in FIG. 4;
FIG. 6 is a cross-sectional plan view of the throttle body device.
FIG. 7 is a partially cutaway side view of a fuel hose.
FIG. 8 is an enlarged longitudinal side view showing a mounting portion of a fuel injection valve to an intake pipe.
FIG. 9 is a view taken along arrow 9 in FIG. 8;
[Explanation of symbols]
27 ... Throttle body device 35 ... Intake passage 36 ... Body 37 ... Valve shaft 38 ... Throttle valve 39 ... Throttle drum 41 ... Throttle cable 42 ... Control unit 43 ..Control box 49 ... coupler 50 ... external coupler 51 ... conductor 53 ... guard member 53a ... partition plate 53b ... cable support 55 ... outer cable 56 ... inner Cable E ... engine

Claims (2)

A valve shaft (37) traversing the intake passage (35) is rotatably supported on a body (36) having an intake passage (35), and a control unit (42) for controlling operation of the engine (E). And a throttle valve (38) for controlling the intake amount is fixed to the valve shaft (37) in the intake passage (35), and the outside of the body (36) is attached. Then, a throttle drum (39) is fixed to one end of the valve shaft (37), and the throttle drum (39) constitutes a throttle cable (41) together with an outer cable (55) to form an outer cable (55). In the throttle body device in which one end of the inner cable (56) drawn from one end is wound and connected ,
A lead wire (51) to be connected to the control unit (42) is connected to the control box (43) attached to the body (36) on the side opposite to the throttle drum (39), on the throttle drum (39) side. And a guard member (53) having a partition plate portion (53a) interposed between the conducting wire (51) and the throttle drum (39) is attached to the body (36), and the guard member (53) The throttle body device is characterized in that a cable support portion (53b) for positioning and supporting one end portion of the outer cable (55) is integrally formed . In the control box (43), a coupler portion (49) to which an external coupler (50) connected to the conducting wire (51) can be detachably attached is provided integrally facing the throttle drum (39) side, and the partition plate part (53a) moth, said coupler part (49) Nitaisuru the external coupler (50) mounting the mounting direction two along the hand plate Jo two extending Yo two formed the ancient city wo feature door to claim 1, wherein placing the throttle body system.

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