JP2008247389A - Fuel system arrangement structure in motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent interference of a riding seat with a connecting part to a fuel pump while increasing the degree of freedom in setting height of the riding seat, in a motorcycle in which the fuel pump attached to the upper wall of a fuel tank is stored in the fuel tank mounted on a vehicle body frame and the upper part of the fuel tank is covered with the riding seat. <P>SOLUTION: The fuel pump 118 is attached to a pump mounting part 119 recessed downward and provided on the upper wall of the fuel tank 34, and the pump mounting part 119 is covered with a cover 138 from above. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a motorcycle in which a fuel pump mounted on an upper wall of the fuel tank is accommodated in a fuel tank mounted on a vehicle body frame, and an upper portion of the fuel tank is covered with a seat for riding, and particularly in a motorcycle. The present invention relates to improvement of the fuel system arrangement structure.

A motorcycle in which the upper part of a fuel tank that houses a fuel pump is covered with a riding seat is already known from, for example, Patent Document 1.
Japanese Patent Publication No.7-110630

  By the way, in the structure in which the fuel tank is attached to the upper wall of the fuel tank, the connecting portion of the fuel pump and the fuel hose is arranged on the upper wall of the fuel tank, and the riding seat to such a connecting portion is arranged. Although it is necessary to avoid interference, in the above-mentioned conventional one, the height of the riding seat is set at a position where interference with the connecting portion does not occur, and the freedom of setting the height of the riding seat becomes narrower. End up.

  The present invention has been made in view of such circumstances, and can increase the degree of freedom in setting the height of the riding seat and prevent the riding seat from interfering with the connecting portion to the fuel pump. An object of the present invention is to provide a fuel system arrangement structure in a motorcycle.

  In order to achieve the above object, according to a first aspect of the present invention, a fuel pump mounted on an upper wall of the fuel tank is accommodated in a fuel tank mounted on a vehicle body frame, and the upper side of the fuel tank is for riding. A motorcycle covered with a seat is characterized in that the fuel pump is attached to a pump mounting portion provided in an upper wall of the fuel tank so as to be recessed downward, and the pump mounting portion is covered from above by a cover.

  According to the structure of the invention described in claim 1, since the pump mounting portion to which the fuel pump is mounted is provided on the upper wall of the fuel tank so as to be recessed downward, the connecting portion to the fuel pump is the pump mounting portion. Even if it arrange | positions above, it can prevent that interference with a boarding seat arises, and the freedom degree of the height setting of a boarding seat can be increased. Moreover, since the pump mounting portion is covered from above by the cover, it is possible to reliably prevent accidental contact with the connecting portion when the riding seat is opened by refueling the fuel tank or the like. The connection portion can be protected and an excellent appearance can be obtained by preventing the connection portion from being exposed.

  According to a second aspect of the present invention, in addition to the structure of the first aspect of the present invention, an insertion hole for inserting the fuel pump into the fuel tank is provided in the pump mounting portion, and the insertion hole A lid plate provided at the upper end of the fuel pump is attached to the pump mounting portion so as to be closed from, and the cover is attached to the lid plate. According to such a configuration, the cover is fixed to the fuel tank side. This eliminates the need for a special member for reducing the number of parts.

  According to a third aspect of the invention, in addition to the configuration of the first or second aspect of the invention, the cover is attached to a stay provided on the vehicle body frame so as to support the fuel tank at a position separated from the fuel pump. According to such a configuration, a dedicated component for attaching the cover is not required, the number of components can be reduced, and the cover can be firmly supported.

  According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a storage box that is covered with the riding seat in front of a fuel tank disposed above a rear wheel. And the pump mounting portion and the fuel pump are arranged at the front of either the left or right side of the fuel tank, and the front end of the left or right side of the fuel tank or the left or right side of the storage box The rear end of the fuel tank is provided with a notch that allows a hose extending from the fuel pump side to pass between the front part of the fuel tank and the rear part of the storage box. It is characterized by being bent and arranged so as to form a substantially U shape with one side in the left-right direction open.

  According to such a configuration of the invention described in claim 4, the fuel pump can be disposed deep in the fuel tank, and the hose can be disposed smoothly. That is, the center of the fuel tank in the left-right direction becomes shallow due to the arrangement above the rear wheel, but the fuel pump is arranged on either the left or right side of the fuel tank so that the deep position of the fuel tank The hose extending from the fuel pump passes through the notch at the front end of the left or right side of the fuel tank or the rear end of the left or right side of the storage box. Since it is bent and arranged in a substantially U shape, the hose is bent gently to avoid bending strongly even though there is a storage box in front of the fuel tank, and the hose is arranged smoothly. be able to.

  Furthermore, in addition to the structure of the invention according to any one of the first to fourth aspects, the invention according to claim 5 provides the riding seat on the upper wall of the fuel tank at a plurality of locations around the pump mounting portion. The seat load receiving position that allows the fuel tank to be received is set, and according to such a configuration, even if the riding seat sinks due to the action of a large load, the fuel tank is located at a plurality of locations around the pump mounting portion. Since the load of the riding seat is received on the upper wall, the deformation of the riding seat can be suppressed, and the load from the riding seat side can be prevented from acting on the cover.

  As described above, according to the first aspect of the present invention, even when the connecting portion to the fuel pump is disposed on the pump mounting portion, it is possible to prevent interference with the riding seat, The degree of freedom in setting the seat height can be increased. In addition, when the passenger seat is opened, the connection to the fuel pump can be protected and an excellent appearance can be obtained.

  According to the second aspect of the present invention, a special member for fixing the cover to the fuel tank side is unnecessary, and the number of parts can be reduced.

  According to the third aspect of the present invention, it is possible to reduce the number of parts by eliminating the need for a dedicated part for attaching the cover, and to firmly support the cover.

  According to the fourth aspect of the present invention, the fuel pump can be disposed deep in the fuel tank, and the hose can be disposed smoothly.

  Furthermore, according to the invention described in claim 5, it is possible to suppress the deformation of the riding seat and to avoid the load from the riding seat side acting on the cover.

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

  FIGS. 1 to 18 show a first embodiment of the present invention. FIG. 1 is an overall side view of the motorcycle, and FIG. 2 is a perspective view of the center in the front-rear direction of the motorcycle with the body cover removed. 3 is a side view of the engine and the intake system, FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 3, FIG. 5 is an enlarged view taken along arrow 5 in FIG. 3, and FIG. 7 is a rear view of the air cleaner as viewed from the direction of the arrow 7 in FIG. 3, FIG. 8 is a sectional view taken along line 8-8 in FIG. 7, FIG. 9 is a view in the direction of arrow 7 in FIG. FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 10, FIG. 12 is a rear vertical side view of the motorcycle, FIG. 13 is a cross-sectional view taken along line 13-13 of FIG. 12, and FIG. 15 is a sectional view taken along line -14, FIG. 15 is an exploded perspective view of the fuel tank, fuel pump, and cover, FIG. 16 is an enlarged sectional view taken along line 16-16 of FIG. 13, and FIG. 17-17 sectional view taken on line, and FIG. 18 is a line 18-18 enlarged sectional view of FIG. 13.

  First, in FIG. 1, the body frame 20 of the motorcycle is connected to a head pipe 21 that supports the front fork 24 so as to be steerable, a main frame 22 that extends rearwardly downward from the head pipe 21, and a rear portion of the main frame 22. And a pair of left and right rear frames 23 extending rearward and upward, a front wheel WF is pivotally supported at the lower end of the front fork 24, and a bar-shaped steering handle 25 is connected to the upper portion of the front fork 24, A front fender 26 that covers the front wheel WF is supported on the front fork 24.

  2 and 3 together, the main frame 22 is a square pipe having a rectangular cross section, and hanger plates 27 are fixed to both side surfaces of the intermediate portion of the main frame 22, respectively. Pivot plates 28 are fixed to both side surfaces of the rear portion 22.

  Below the main frame 22, for example, an engine E having a cylinder axis slightly raised forward is disposed. The engine E is supported by the hanger plate 27. Suspended by.

  A front end portion of a rear fork 29 is supported on the pivot plate 28 so as to be able to move up and down at night. A rear wheel WR is pivotally supported on the rear end of the rear fork 29. A rear cushion 30 is provided between the rear frame 23... And the rear fork 29 in the vehicle body frame 20.

  The engine E constitutes a power unit P together with the transmission M, and the output of the transmission M is transmitted to the rear wheel WR via the chain 31.

  A throttle body 32 and an air cleaner 33 in front of the throttle body 32 are disposed above the engine E, and a fuel tank 34A is disposed above the rear wheel WR. The upper portion of the storage box 35A and the fuel tank 34A disposed in front is covered with a riding seat 36 of, for example, a tandem type so as to be opened and closed.

  A synthetic resin vehicle body cover 38 is attached to the vehicle body frame 20 to cover the vehicle body frame 20, a part of the engine E, the throttle body 32, the air cleaner 33, the fuel tank 34A, and the storage box 35A. 38, front side covers 39 arranged on the left and right sides of the main frame 22, leg shields 40 connected to the front portions of the front side covers 39 so as to cover the rider's legs from the front, and a head pipe. The front top cover 41 is connected to both leg shields 40 so as to cover 21 from the front, and the main frame top cover is connected to the front top cover 41 so as to cover the head pipe 21 from the rear side and cover the main frame 22 from above. 42 and both the front side covers 3 ... an under cover 43 ... connecting to the bottom of, and a rear side cover 44 that covers the fuel tank 34A and the storage box 35A from both sides.

  The riding seat 36 is disposed on the rear side cover 44 so as to be openable and closable so that articles can be stored and taken out from the storage box 35A and fuel can be supplied to the fuel tank 34A. A covering rear fender 45 is connected to the rear side cover 44.

  In FIG. 4, the throttle body 32 has a butterfly throttle valve 46 that adjusts the amount of air supplied to the engine E rotatably supported on the body 47, and is connected to the throttle valve 46 at the side of the body 47. A throttle wire 49 is wound around and connected to a throttle drum 48 arranged in the above.

  The body 47 has an intake passage 50 extending in the front-rear direction of the motorcycle, and a throttle valve 46 disposed in an intermediate portion of the intake passage 50 is rotatable to the body 47 so as to cross the intake passage 50. It is fixed to the valve shaft 51 to be supported. The throttle drum 48 is disposed on the left side of the body 47 in a state where the motorcycle is directed forward in the traveling direction, and the throttle drum 48 is fixed to one end of the valve shaft 51. In addition, a return spring 52 for biasing the throttle valve 46 toward the closing side is provided between the throttle drum 48 and the body 47, and a rider of the motorcycle pushes the throttle wire 49 against the spring force of the return spring 52. By performing the pulling operation, the throttle valve 46 is rotationally driven to the opening side.

  A housing 55 that accommodates the control unit 53 is attached to the side surface of the body 47 opposite to the throttle drum 48, that is, the right side surface. The housing 55 includes a housing main body 56 attached to the body 47 and a cover plate 57 that seals an opening of the housing main body 56, and the control unit 53 is sandwiched between the housing main body 56 and the cover plate 57. An electronic circuit (not shown) is configured on the circuit board 54.

  A throttle sensor 58 that detects the opening of the throttle valve 46 is connected to the circuit board 54. The throttle sensor 58 includes a rotor 59 loosely fitted to the housing main body 56, conductive brushes 60, 60 projecting from the rotor 59 toward the circuit board 54, and the conductive brushes 60, The rotator 59 is fitted to the other end of the valve shaft 51 with no play while preventing relative rotation. The rotor 59 is rotatably supported by a support shaft 62 that is coaxial with the valve shaft 51 and penetrates the circuit board 54 and protrudes from the cover plate 57. According to such a throttle sensor 58, the opening degree of the throttle valve 46 is detected on the control unit 53 side as a voltage across the resistor 61.

  Further, a through-hole 63 that opens to the intake passage 50 is provided in the body 47 on the upstream side of the throttle valve 46. A detection cylinder 64 having a bottom cylindrical shape is provided integrally with the housing body 56.

  An intake air temperature sensor 67 is constituted by a thermistor 65 that is in close contact with the inner surface of the tip closing portion of the detection cylinder 64 and a terminal 66 that extends from the thermistor 65 and is connected to the circuit board 54 in the detection cylinder 64. The control unit 53 is configured to detect a voltage change corresponding to a change in the resistance value of the thermistor 65 with a change in the intake air temperature. Moreover, the detection tube 64 is filled with a potting agent 68 made of synthetic resin after the intake air temperature sensor 67 is accommodated.

  Since the throttle sensor 58 and the intake air temperature sensor 67 are connected to the circuit board 54 of the control unit 53 attached to the throttle body 47 in this way, the throttle sensor 58 and the intake air temperature sensor 67 are connected to the control unit 53. This wiring can be made extremely short.

  The upper portion of the housing 55 extends to the throttle drum 48 side across the upper portion of the body 47, and a coupler 69 that opens to the same side as the throttle drum 48 is formed integrally with the housing main body 56 of the housing 55. .

  Referring to FIG. 3, a synthetic resin cleaner case 70 included in the air cleaner 33 includes a bowl-shaped case main body 71 supported by the main frame 22, and a bowl-shaped cover 72 opened to face the case main body 71. The filter unit 73 is sandwiched between the peripheral portions of the 71 and 72 and coupled to each other. The cleaner case 70 has an unpurified chamber 74 on the cover 72 side and a case main body 71 side. It is divided into a purification chamber 75.

  A connecting tube 76 for guiding purified air from the air cleaner 33 to the throttle body 32 is fixedly connected to the case main body 71 of the cleaner case 70 so that its upstream end enters the purification chamber 75. An upstream connection cylinder 47 a (see FIG. 4) integrally provided with the body 47 of the throttle body 32 is fitted to the downstream end of the connecting tube 76. Moreover, a fixing band 77 for fixing and maintaining the connection state of the connecting tube 76 to the throttle body 32 is wound around the downstream end of the connecting tube 76, and the fixing band 77 is tightened by the screw member 78. The connecting state of the connecting tube 76 to the throttle body 32 is fixedly maintained.

  Referring to FIGS. 5 to 8, at least the throttle drum 48 of the throttle body 32 disposed obliquely below the air cleaner 33 is disposed at the front of the case main body 71 of the cleaner case 70 of the air cleaner 33. And the coupler 69 provided in the housing 55 in the throttle body 32 is also arranged on the throttle drum 48 side, so that the coupler 69 is also covered with the shielding plate 79 from the front.

  For example, a circular operation opening 80 is provided in the shielding plate 79 at a position corresponding to the fixing band 77, and the operation opening 80 can be opened and closed on the shielding plate 79. A lid 81 disposed on the front side is attached.

  A support hole 82 is provided in the shielding plate 79 at a position away from the operation opening 80, and a support shaft 83 inserted into the support hole 82 is provided in the cover 81 made of rubber to the support hole 82. Are inserted integrally so that the diameter of the distal end can be reduced, and a plurality of engaging claws 83 a... Are engaged with the back of the shielding plate 79 around the support hole 82 around the support hole 82. Provided integrally. That is, the lid 81 is between the position where the operation opening 80 is closed as shown by the solid line in FIG. 5 and the position where the operation opening 80 is opened as shown by the chain line in FIG. It is attached to the shielding plate 79 so as to be able to rotate around the axis of the screen.

  The lid 81 is integrally provided with a fitting cylinder 84 that is divided into a plurality of circumferential directions so as to be elastically fitted into the operation opening 80 when the operation opening 80 is closed. The plurality of engaging claws 84a provided at the front end of the fitting cylinder 84 are elastically engaged with the back surface of the shielding plate 79 around the operation opening 80, thereby enabling operation by the lid 81. The closed state of the opening 80 is maintained.

  A tool 86 such as a wrench is inserted into the head cover 87 when the head cover 87 is removed at the lower end of the shielding plate 79 at a portion corresponding to the head cover 87 in the engine E to adjust the tappet of the valve operating device in the engine E. A notch 79a is provided.

  A throttle drum guard 161 made of synthetic resin is attached to the air cleaner 33 so as to cover the throttle drum 48 of the throttle body 32 from the side, in this embodiment from the left side. That is, a mounting boss 71 a for fastening the upper portion of the throttle drum guard 161 with the screw member 162 is integrally provided on the left side of the back surface of the case main body 71 in the cleaner case 70 of the air cleaner 33, and on the lower left side of the shielding plate 79. A rectangular engagement hole 163 for engaging a substantially L-shaped engagement claw 161a provided at the lower portion of the throttle drum guard 161 is provided.

  Thus, the upper portion of the throttle drum guard 161 whose lower portion is brought into contact with the back surface of the shielding plate 79 while the engaging claw 161a is engaged with the engaging hole 163 is fastened to the mounting boss 71a with the screw member 162. The throttle drum guard 161 is attached to the air cleaner 33.

  Further, an exhaust pipe 164 connected to an exhaust port (not shown) of the cylinder head 88 is connected to the lower part of the cylinder head 88 in the engine E, and fresh exhaust gas flowing from the exhaust port to the exhaust pipe 164 is renewed. A downstream end of a pipe line 165 for supplying secondary air is connected to the head cover 87, and an upstream end of the pipe line 165 is connected to a secondary air control valve 166 supported by the engine E. The secondary air control valve 166 is connected to a filter 167 supported by the main frame 22.

  The filter 167 is connected to the downstream end of an air supply tube 168 that extends forward from the filter 167 along the main frame 22. The upstream end of the air supply tube 168 extends to above the cover air cleaner 33. And is released to the atmosphere in the body cover 38.

  In addition, a fitting groove 169 for fitting a portion near the upstream end of the air supply tube 168 is provided in the upper rear surface of the case main body 71 in the cleaner case 70 of the air cleaner 33, and is fitted into the fitting groove 169. An engagement pin 170 that abuts and engages with the air supply tube 168 of the above portion from above is integrally provided. That is, the portion near the upstream end of the air supply tube 168 is held in the upper part of the back surface of the case main body 71 by fitting into the fitting groove 169 and engaging and engaging the engagement pin 170 from above. . For this reason, it is not necessary to attach a dedicated clamper for holding the air supply tube 168 to the main frame 22.

  A downstream connection cylinder 47b (see FIG. 4) provided integrally with the body 47 of the throttle body 32 is connected to an upstream end of an intake pipe 89 whose downstream end is connected to an upper portion of a cylinder head 88 in the engine E.

  Referring also to FIGS. 9 to 11, the intake pipe 89 is bent in a substantially C shape so as to connect the throttle body 32 and the cylinder head 88 obliquely below the throttle body 32. The intake pipe 89 is covered with a covering material 90 made of rubber so as to be baked on the surface thereof, and a connecting cylinder portion 90a provided integrally with the covering material 90 is provided downstream of the throttle body 32. The throttle body 32 is connected to the intake pipe 89 by closely fitting the side connection cylinder 47b.

  A fuel injection valve 91 for injecting fuel into the cylinder head 88 is attached to the intake pipe 89. The opening / closing operation of the fuel injection valve 91 is housed in a housing 55 attached to the body 47 of the throttle body 32, It is controlled by a fixed control unit 53.

  The intake pipe 89 is provided with a mounting hole 92 that opens toward the cylinder head 88, and the front end of the fuel injection valve 91 is fitted in the mounting hole 92 in an airtight manner so that the front end faces the intake pipe 89. Combined. The rear end portion of the fuel injection valve 91 is liquid-tightly fitted to the cap 93, and the cap 93 is fastened to the intake pipe 89. That is, the fuel injection valve 91 is attached to the intake pipe 89 so as to be sandwiched between the intake pipe 89 and the cap 93.

  The cap 93 is provided with a fuel supply path 94 so that the downstream end communicates with the rear end portion of the fuel injection valve 91, and an inlet-side connection pipe 95 leading to the upstream end of the fuel supply path 94 is provided. A flange is joined to the cap 93.

  The cap 93 is provided with a return path 96 branched from the middle of the fuel supply path 94, and a pressure regulating valve 97 is connected to the return path 96.

  The valve housing 98 of the pressure regulating valve 97 is arranged in parallel with the fuel injection valve 91 at a position adjacent to the fuel injection valve 91, and the upper end portion of the valve housing 98 is connected to the return path 96 with liquid. A connection pipe 99 communicating with the cap 93 is interposed between the cap 93 and the cap 93 so as to be attached to the cap 93. That is, the pressure regulating valve 97 is disposed so as not to protrude from the cap 93 sideward and to extend downward from the cap 93.

  A cover 101 is coupled to the lower portion of the valve housing 98 so as to sandwich the peripheral edge portion of the diaphragm 100 between the valve housing 98 and the return path 96 between the valve housing 98 and the diaphragm 100. A communicating valve chamber 102 is formed, and a spring chamber 103 is formed between the diaphragm 100 and the cover 101.

  The valve housing 98 is integrally provided with a return side connection pipe portion 104 extending below the inlet connection pipe 95 flanged to the cap 93 and extending to the same side as the inlet connection pipe 95. A cylindrical valve seat member 105 communicating with the portion 104 is fitted and fixed so as to face a central portion of the valve chamber 102 and partially protrude toward the diaphragm 100 side. Thus, a valve body 106 that can be seated on the end of the valve seat member 105 on the valve chamber 102 side is held at the center of the diaphragm 100 so as to be able to swing somewhat. A spring 107 contracted between the cover 101 and the diaphragm 100 is accommodated on the valve chamber 102 side so as to exert a spring force on the side that causes the diaphragm 100 to bend.

  In such a pressure regulating valve 97, when the hydraulic pressure on the valve chamber 102 side that biases the diaphragm 100 toward the spring chamber 103 exceeds the spring force on the spring chamber 103 side that biases the diaphragm 100 toward the valve chamber 102. The diaphragm 100 bends toward the spring chamber 103 side, the valve body 106 is separated from the valve seat member 105, and the fluid pressure in the fuel supply passage 94 leading to the valve chamber 102 via the return passage 106, that is, the fuel to the fuel injection valve 91 The supply pressure is adjusted so as not to exceed the set pressure.

  Further, since the pressure adjusting valve 97 is disposed at a position adjacent to the fuel injection valve 91 as described above, the length of the fuel supply path 94 connecting the fuel injection valve 91 and the pressure adjusting valve 97 is shortened. It is possible to prevent the fuel flowing through the fuel supply path 94 from becoming high temperature.

  12-14, the fuel tank 34A is composed of a lower tank half body 110 and an upper tank half body 111 coupled to each other. A flange portion 112 is integrally formed. The fuel tank 34A is supported by both rear frames 23 in the vehicle body frame 20. The rear frame 23 has a stay 113 for supporting the front portion of the fuel tank 34A and the fuel tank. Support bosses 114 for supporting the rear portion of 34A are provided. Thus, the flange portion 112 placed on the stay 113 is fastened to the stay 113 by bolts 115 and weld nuts 116, and the flange portion 112 placed on the support boss 114 is bolted. 117 is fastened to the support boss 114.

  By the way, the fuel tank 34A is arranged above the rear wheel WR, and in order to avoid interference with the rear wheel WR, the bottom of the fuel tank 34A, that is, the bottom of the lower tank half 110, has a central portion in the left-right direction. It is formed so as to swell upward. In other words, the fuel tank 34A is formed such that the left and right side portions 34L and 34R are deeper than the center portion 34C.

  Referring also to FIG. 15, a fuel pump 118 is accommodated in the fuel tank 34A, and this fuel pump 118 is attached to the upper wall of the fuel tank 34A, that is, the upper tank half 111.

  A flat pump mounting portion 119 that is recessed downward is provided on the upper wall front portion of the left or right side of the fuel tank 34A (left side portion 34L in this embodiment), and either the left or right side of the fuel tank 34A ( In this embodiment, a hose disposition portion 120 inclined forward and downward is provided at the front of the upper wall of the right side portion 34R).

  The pump mounting portion 119 is provided with, for example, an elliptical insertion hole 121 for inserting the fuel pump 118 into the fuel tank 34A. That is, the fuel pump 118 is disposed on either the left or right side of the fuel tank 34A (left side portion 34L in this embodiment).

  A filter (not shown) is connected to the lower portion of the fuel pump 118, and a filter chamber 122 covering the filter is supported by the lower portion of the fuel pump 118 so as to maintain a predetermined liquid level in the filter chamber 122. A float 123 for detecting the fuel level in the fuel tank 34A is supported by the fuel pump 118.

  On the upper surface of the pump mounting portion 119, a mounting plate 124 that is formed in an elliptical shape so as to surround the insertion hole 121 is welded. In the mounting plate 124, a plurality of, for example, six low-order parts 124a, which are welded to the pump mounting part 119, and a plurality of, for example, six high-order parts 124b, which are raised in a trapezoidal shape, are alternately connected in the circumferential direction. The lower positions 124a are welded to the upper surface of the pump mounting portion 119, respectively.

  Referring to FIGS. 16 and 17 together, bolts 125 are welded to the lower surfaces of the high-level portions 124b to protrude upward from the high-level portions 124b, The bolts 125 are inserted into the outer peripheral portion of an elliptical plate-like cover plate 126 provided at the upper end of the fuel pump 118 so that the nuts 127 are screwed into the bolts 125. By tightening, the cover plate 126, that is, the fuel pump 118 is attached to the pump attachment portion 119.

  Moreover, a rubber gasket 128 is interposed between the pump mounting portion 119 and the lid plate 126, and the gasket 128 is an opening for arranging the high-order portions 124b of the mounting plate 124, respectively. 129... Are formed in an oval shape, and are clamped between the lower portion 124 a of the mounting plate 124 and the lid plate 126 by the tightening of the nuts 127 screwed to the respective bolts 125. The pressure is sandwiched between the pump mounting portion 119 and the lid plate 126 inside and outside the plate 124.

  A discharge pipe 130 bent in a substantially L shape is connected to the upper end of the fuel pump 118, and the fuel pump 118 discharges fuel from the discharge pipe 130. A return pipe 131 that penetrates the lid plate 126 in a liquid-tight manner and extends to the lower part of the fuel tank 34A on the side of the fuel pump 118 is fixed to the lid plate 126. The return pipe 131 is bent into a substantially L shape, similar to the discharge pipe 130.

  In addition, the discharge pipe 130 and the return pipe 131 are arranged in parallel to the right front side above the cover plate 126, and the upstream end of the fuel hose 132 is connected to the discharge pipe 130. Is connected to the downstream end of the return hose 133 whose upstream end is connected to the return side connecting pipe 104 of the pressure regulating valve 97.

  By the way, the front end of the fuel tank 34A along the direction of the discharge pipe 130 and the return pipe 131, that is, the flange 112 at the right front end of the fuel tank 34A where the fuel pump 118 is arranged at the left front, is located in front of the fuel tank 34A. A notch 135 for forming a space through which the fuel hose 132 and the return hose 133 pass is provided between the storage box 35A and the storage box 35A. The fuel hose 132 and the return hose 133 are connected to the discharge pipe 130 and the return pipe. 131 is extended downward from the notch 135 via the hose arrangement part 120 from 131, and further bent so as to extend to the left side of the storage box 35A behind the storage box 35A. That is, the fuel hose 132 and the return hose 133 connected to the discharge pipe 130 and the return pipe 131 are bent and arranged in a substantially U shape opened to the left side behind the storage box 35A.

  Thus, on the left side of the storage box 35A, the fuel hose 132 and the return hose 133 extend forward in parallel, but the downstream end of the fuel hose 132 is on the left side of the front portion of the storage box 35A. A fuel hose 137 is connected to a high pressure filter 136 supported by a support member 134 at the front, and an upstream end is connected to the high pressure filter 136, and an inlet side connection pipe 95 of the cap 93 for supplying fuel to the fuel injection valve 91. Connected to. Moreover, the high-pressure filter 136 is supported by the rear frame 23 by the support member 134 at a position where maintenance can be easily performed by removing the main frame top cover 42.

  Thus, the fuel hose 132 and the return hose 133 are connected to the cap 93 and the pressure adjustment valve 97, and the fuel from the fuel pump 118 circulates back and forth to the pressure adjustment valve 97 in the vicinity of the fuel injection valve 191. Therefore, even if the engine E is arranged below the fuel hose 132 and the return hose 133, it is possible to prevent the fuel temperature from rising.

  The pump mounting portion 119 and the hose arrangement portion 120 are covered from above with a cover 138 that covers the upper end of the fuel pump 118, the fuel hose 132, and the return hose 133, and this cover 138 is a cover plate of the fuel pump 118. Fastened to a pair of support members 139 and 139 fixed to 126. That is, the cover 138 is attached to the lid plate 126 via the support members 139 and 139.

  The support members 139 and 139 are arranged on opposite sides of the insertion hole 119 of the fuel tank 34A, and six sets of bolts 125 for fastening the cover plate 126 of the fuel pump 118 to the mounting plate 124. .. And nuts 127... Are fastened to the lid plate 126 by two pairs of bolts 125... And nuts 127.

  In addition, weld nuts 140 and 140 are fixed to the upper inner surfaces of the support members 139 and 139, and a cover 138 placed on the support members 139 and 139 and a screw member 141 inserted into the support members 139 and 139. , 141 are screwed into the weld nuts 140, 140.

  Further, the right end portion of the cover 138 that is separated from the fuel pump 118 is supported by a stay 113 fixed to the right rear frame 23 so as to support the right front portion of the fuel tank 34A. As shown by 18, the bolt 115 and the weld nut 116 together with the flange 112 at the right front portion of the fuel tank 34 </ b> A are fastened to the stay 113.

  Incidentally, as shown in FIG. 12, the lower portion of the storage box 35A is supported on a support plate 142 provided between the front portions of the rear frames 23 through a pair of mounting members 143, and the rear portion of the storage box 35A. As shown in FIG. 18, the left and right upper end portions are supported by the front portions of the stays 113 through mount members 144.

  A mounting member 144 is interposed between the front part of the support rod 35a ... and the stay 113 ... integrally provided at the left and right upper ends of the rear portion of the storage box 35A, and comes into contact with the upper surface of the support rod 35a ... The metal cylindrical collars 145 are inserted into the synthetic resin washers 149 and the mount members 144, and the metal washers 148 are brought into contact with the upper ends of the washers 149 and the collars 145. Thus, bolts 147 having locking heads 147a that engage with the washers 148 are inserted into the wash nuts 146 that are inserted into the washers 148 and the collars 145 and fixed to the lower surface of the front portion of the stay 113. By tightening the bolts 147 to be screwed together, the left and right upper ends of the rear portion of the storage box 35A are supported by the stays 113.

  The front end of the passenger seat 36 is supported by a central upper portion of the front end of the storage box 35A through a hinge 150 so that it can be opened and closed. When the passenger seat 36 is closed, a receiving plate that receives the rear portion of the passenger seat 36. 151 is provided between the rear portions of the rear frames 23, and a pair of elastic members 153 fixed to the lower surface of the bottom plate 36a of the riding seat 36 are in contact with the receiving plate 151. Further, both ends of the grab rail 152 are attached to the receiving plate 151.

  By the way, when the load applied to the passenger seat 36 in the closed state is relatively small, the intermediate portion in the front-rear direction of the passenger seat 36 does not come into contact with the fuel tank 34A. When the seat 36 bends downward, the seat load receiving position for receiving the load of the riding seat 36 is on the upper wall of the fuel tank 34A at a plurality of locations around the pump mounting portion 199, in this embodiment, three locations. The three elastic members 154A, 154B, and 154C that are set and fixed to the lower surface of the bottom plate 36a of the passenger seat 36 can come into contact with the upper wall of the fuel tank 34A at each seat load receiving position. The elastic material 154C may be omitted, and the elastic materials 154A and 1454B may contact the upper wall of the fuel tank 34A at a pair of seat load receiving positions.

  A fuel injection port (not shown) for supplying fuel to the fuel tank 34A is provided at a substantially central portion of the upper wall of the fuel tank 34A, and a fuel injection cap 155 for closing the fuel injection port is provided in the fuel tank 34A. Removably attached to the top wall.

  Next, the operation of the first embodiment will be described. Since the shield case 70 of the air cleaner 33 is integrally provided with a shielding plate 79 that covers at least the throttle drum 48 of the throttle body 32 from the front, the number of parts increases. It is possible to prevent water or mud splashed from the front wheel WR from being applied to the throttle drum 48.

  Further, a control unit 53 for controlling the operation of a fuel injection valve 91 for supplying fuel to the engine E is attached to the body 47 of the throttle body 32, and this control unit 53 is also covered from the front by a shielding plate 79. The waterproof and mudproof properties of the control unit 53 can also be enhanced.

  Further, since the throttle drum guard 161 that covers the throttle drum 48 of the throttle body 32 from the side (in this embodiment, the left side) is attached to the cleaner case 70 of the air cleaner 33, water and mud are drawn from the side of the throttle body 32 to the throttle drum. It is possible to prevent the drum 48 from being applied.

  In addition, an operating opening 80 is provided in the shielding plate 79 at a position corresponding to the fixing band 77 for connecting the connecting tube 76 that guides purified air from the air cleaner 33 to the throttle body 32. Since the lid 81 that can be opened and closed is attached to the shielding plate 79, a finger is inserted from the front through the operation opening 80 to press the fixing band 77 in spite of the presence of the shielding plate 79. Thus, the fastening band 77 can be easily tightened and loosened from the side, so that workability during maintenance and assembly can be improved.

  Further, a pump mounting portion 119 for mounting the fuel pump 118 accommodated in the fuel tank 34A is provided on the upper wall of the fuel tank 34A so as to be recessed downward, and the pump mounting portion 119 is covered from above by the cover 138. Even if the connecting portions such as the fuel hose 132 and the return hose 133 to the fuel pump 118 are arranged on the pump mounting portion 119, it is possible to prevent the interference with the riding seat 36, and the riding seat. The degree of freedom in setting the height of 36 can be increased. In addition, since the pump mounting portion 119 is covered by the cover 36 from above, when the riding seat 36 is opened by refueling or the like to the fuel tank 34A, it is possible to reliably prevent accidental contact with the connecting portion. The connection portion to the fuel pump 118 can be protected, and an excellent appearance can be obtained by preventing the connection portion from being exposed.

  Further, a lid plate 126 provided at the upper end of the fuel pump 118 so as to close the insertion hole 121 provided in the pump mounting portion 119 so as to insert the fuel pump 118 into the fuel tank 34A is provided in the pump mounting portion 119. Since the cover 138 is attached to the lid plate 126 via the support members 139 and 139, a special member for fixing the cover 138 to the fuel tank 34A side is unnecessary, and the number of parts can be reduced.

  The right front part of the cover 138 spaced apart from the fuel pump 118 is attached to the stay 113 provided on the rear frame 23 of the vehicle body frame 20 by supporting the fuel tank 34A by fastening together with the fuel tank 34A. It is possible to reduce the number of parts by eliminating the need for a dedicated part for attachment, and it is possible to firmly support the cover 138.

  Further, since the pump mounting portion 119 and the fuel pump 118 are disposed in front of either one of the left and right sides (in this embodiment, the left side portion 34L) of the fuel tank 34A disposed above the rear wheel WR, the fuel pump 118 can be disposed deep in the fuel tank 34A. That is, the center 34C in the left-right direction of the fuel tank 34A becomes shallow due to being disposed above the rear wheel WR, but by disposing the fuel pump 118 on either the left or right side of the fuel tank 34A. This is because the fuel pump 118 can be disposed deep in the fuel tank 34A.

  Further, a fuel hose 132 and a return hose 133 extending from the fuel pump 118 side are disposed in front of the fuel tank 34A at the front end portion on either the left or right side of the fuel tank 34A (right side portion 34R in this embodiment). A notch 135 is provided between the storage box 35A and the rear portion thereof, and the fuel hose 132 and the return hose 133 are opened on the one side in the left-right direction (the left side in this embodiment) on the rear side of the storage box 35A. It is bent and arranged so as to form a substantially U-shape. As a result, the fuel hose 132 and the return hose 133 are smoothly arranged so that the fuel hose 132 and the return hose 133 are bent gently while avoiding strong bending even though the storage box 35A is in front of the fuel tank 34A. can do.

  In addition, seat load receiving positions are set on the upper wall of the fuel tank 34A at a plurality of locations around the pump mounting portion 119 so as to be able to receive the riding seat 36. Even if it sinks, the load of the riding seat 36 is received on the upper wall of the fuel tank 34A at a plurality of locations around the pump mounting portion 119. Therefore, deformation of the riding seat 36 is suppressed, and the riding seat 36 is placed on the cover 138. It is possible to avoid the load from the side from acting.

  FIG. 19 shows a second embodiment of the present invention. A pump mounting portion 119 and a fuel pump 118 are arranged at the front of either the left or right side (left side in this embodiment) of the fuel tank 34B. The hoses 132 and 133 extending from the fuel pump 118 side and the front part of the fuel tank 34B and the storage are provided at the rear end of either the left or right side (right side in this embodiment) of the storage box 35B disposed in front of the fuel tank 34B. A notch 157 passing between the rear portions of the box 35B may be provided.

  According to the second embodiment, the same effect as that of the first embodiment can be obtained.

  FIG. 20 shows a third embodiment of the present invention, in which a fuel tank 34C is attached to a pump mounting portion 119 'provided on the rear upper wall of the central portion in the left-right direction of the fuel tank 34C disposed in front of the storage box 35C. The upper end of the fuel pump 118 accommodated therein is attached, and the pump attachment portion 119 'is covered from above with a cover 138'.

  In addition, a notch 158 is provided at the front end portion on either one of the left and right sides of the storage box 35C to allow the fuel hose 132 and return hose 133 extending from the fuel pump 118 side to pass between the rear portion of the fuel tank 34C. The fuel hose 132 and the return hose 133 are bent and arranged so as to form a substantially U shape with the other side in the left-right direction (the right side in this embodiment) open on the rear side of the fuel tank 34C.

  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.

1 is an overall side view of a motorcycle according to a first embodiment. Fig. 3 is a perspective view of the center part in the front-rear direction of the motorcycle with the vehicle body cover removed. It is a side view of an engine and an intake system. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. FIG. 5 is an enlarged view taken along arrow 5 in FIG. 3. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 4 is a rear view of the air cleaner as viewed from the direction of arrow 7 in FIG. 3. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. FIG. 9 is a view taken in the direction of arrow 9 in FIG. 3. It is a top view of an intake pipe and a fuel injection valve. It is the 11-11 line sectional view of FIG. 1 is a rear longitudinal side view of a motorcycle. FIG. 13 is a sectional view taken along line 13-13 of FIG. FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. It is a disassembled perspective view of a fuel tank, a fuel pump, and a cover. It is a 16-16 line expanded sectional view of Drawing 13. FIG. 17 is a cross-sectional view taken along line 17-17 in FIG. 16. FIG. 18 is an enlarged cross-sectional view taken along line 18-18 in FIG. 13. It is sectional drawing corresponding to FIG. 13 of 2nd Example. It is a top view of the fuel tank and storage box in 3rd Example.

Explanation of symbols

20 ... Body frames 34A, 34B, 34C ... Fuel tanks 35A, 35B ... Storage box 36 ... Riding seat 113 ... Stay 118 ... Fuel pump 119, 119 '... Pump Mounting portion 132 ... Fuel hose 133 ... Return hose 135, 157 ... Notches 138, 138 '... Cover WR ... Rear wheel

Claims (5)

  A fuel pump (118) attached to an upper wall of the fuel tank (34A to 34C) is accommodated in a fuel tank (34A, 34B, 34C) mounted on the vehicle body frame (20), and the fuel tank (34A to 34A to 34C) is accommodated. 34C) in a motorcycle in which the upper part of the motorcycle 34 is covered with a passenger seat (36), the fuel pump (119, 119 ') is provided on the upper wall of the fuel tank (34A-34C) and is recessed downward. 118), and the pump mounting portion (119, 119 ') is covered with a cover (138, 138') from above, a fuel system arrangement structure in a motorcycle.   An insertion hole (121) for inserting the fuel pump (118) into the fuel tank (34A to 34C) is provided in the pump mounting portion (119, 119 '), and the insertion hole (121) is blocked from above. Thus, the cover plate (126) provided at the upper end of the fuel pump (118) is attached to the pump mounting portion (119, 119 '), and the cover (138, 138') is attached to the cover plate (126). The fuel system arrangement structure in a motorcycle according to claim 1, wherein the fuel system is arranged.   The cover (138) is attached to a stay (113) provided on the vehicle body frame (20) so as to support the fuel tanks (34A to 34C) at a position separated from the fuel pump (118). The fuel system arrangement structure in the motorcycle according to claim 1 or 2.   A storage box (35A, 35B) covered with the riding seat (36) is disposed in front of the fuel tank (34A, 34B) disposed above the rear wheel (WR), and the fuel tank (34A, 34B). ), The pump mounting portion (119) and the fuel pump (118) are arranged at the front part on either the left or right side of the fuel tank (34A, 34B). A hose (132, 133) extending from the fuel pump (118) side is disposed at the rear end portion on either the left or right side of (35A, 35B) and the front portion of the fuel tank (34A, 34B) and the storage. Notches (135, 157) are provided between the rear portions of the boxes (35A, 35B), and the hoses (132, 133) are located behind the storage boxes (35A, 35B). Fuel system disposition structure of a motorcycle according to any one of claims 1 to 3, characterized in that it is arranged curved so as to form a substantially U-shaped opening the said lateral direction one side in.   A seat load receiving position that allows the rider to receive the riding seat (36) is set on the upper wall of the fuel tank (34A to 34C) at a plurality of locations around the pump mounting portion (119, 119 '). The fuel system arrangement structure in a motorcycle according to any one of claims 1 to 4.

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