MXPA03010544A

MXPA03010544A - Fuel system arrangement structure for motorcycle.

Info

Publication number: MXPA03010544A
Application number: MXPA03010544A
Authority: MX
Inventors: Umezawa Hisashi
Original assignee: Honda Motor Co Ltd
Priority date: 2002-11-29
Filing date: 2003-11-18
Publication date: 2005-04-19
Also published as: KR20040047581A; JP4176456B2; CN1260089C; CN1504377A; TW200415059A; KR100510023B1; TWI228093B; JP2004182018A

Abstract

PROBLEM TO BE SOLVED: To prevent the interference of a riding seat with a connection part to a fuel pump while increasing the freedom degree of setting of the height of the riding seat in a motorcycle wherein the fuel pump attached on the upper wall of a fuel tank is housed in the fuel tank mounted on a vehicle frame, and an upper part of the fuel tank is covered by the riding seat. SOLUTION: The fuel pump 118 is attached on a pump attachment part 119 downward recessed and provided on the upper wall of the fuel tank 34, and the pump attachment part 119 is covered by a cover 138 from an upper part.

Description

STRUCTURE OF THE DISPOSITION OF THE FUEL SYSTEM IN A MOTORCYCLE Detailed Description of the Invention The present invention relates to a motorcycle in which a fuel pump mounted in an upper wall of a fuel tank mounted in the structure of the vehicle body It is contained in the fuel tank and the upper side of the fuel tank is covered with a saddle, and particularly an improvement in the structure of the fuel system arrangement in a motorcycle. Previous Technique A motorcycle in the. which the upper side of a fuel tank containing a fuel pump therein is covered with an assembling seat is already known, for example, in Patent Reference 1 and the like (Japanese Patent Laid-open Publication No. Hei 7-110630) . Problems to be Solved by the Invention Meanwhile, in a structure in which a fuel tank is mounted to an upper wall of a fuel tank, a connection portion between the fuel pump and a fuel hose is placed in a fuel tank. the upper wall of the fuel tank, and it is necessary to avoid the interference of a saddle with the connection portion. In the aforementioned conventional structure, the height of the mounting seat is adjusted in a position such that it does not cause interference with the connection portion, with the result that the degree of freedom in adjusting the height of the mounting seat is limited . The present invention has been made taking into consideration the above. Accordingly, an object of the present invention is to provide a structure for the arrangement of the fuel system in a motorcycle with which it is possible to prevent the mounting seat from interfering with a connection portion for connection to a fuel pump. , while increasing the degree of freedom in adjusting the height of the saddle. In order to achieve the above objective, the invention as stipulated in claim 1 is characterized in that, in a motorcycle that includes a fuel tank mounted in a structure of the vehicle body, and a fuel pump mounted in a Upper wall of the fuel tank, the fuel pump contained in the fuel tank, and the upper side of the fuel tank that is covered with a mounting seat, the fuel pump is mounted to a mounting portion of the pump provided in the upper wall of the fuel tank in a laying condition in a downwardly recessed manner, and the mounting portion of the pump is covered with a cover from the upper side. According to this inventive constitution of claim 1, the mounting portion of the pump to which the fuel pump is to be mounted is provided in the upper wall of the fuel tank in the down-flush state. Therefore, even when a connection portion for the connection to the fuel pump is placed in the mounting portion of the pump it is possible to avoid interference of the pump with the mounting seat, and increase the freedom side in the adjustment of the height of the riding seat. In addition, since the upper side of the mounting portion of the pump is covered with the cover from the upper side, it is possible to safely prevent the wrong contact with the connecting portion at the time when the mounting seat is opened to supply fuel to the fuel tank or a similar purpose, and to protect the connection portion to connect to the fuel pump. In addition, it is possible to prevent the connection portion from being exposed, and to obtain an excellent appearance.

In addition, the invention as set forth in claim 2 is characterized, in addition to the constitution of the invention of claim 1, because the mounting portion of the pump is provided with an insertion hole for inserting the fuel pump into the fuel tank, a cover plate provided at the upper end of the fuel pump is attached to the mounting portion of the fuel pump. the pump in order to close the insertion hole from the upper side, and the cover is attached to the cover plate. According to this constitution, it is possible to eliminate the need for a special member to fix the cover next to the fuel tank and in this way achieve a reduction in the number of component parts. The invention as specified in claim 3 is characterized, in addition to the constitution of the invention as stipulated in claim 1 or 2, because in a position spaced from the fuel pump, the cover is attached to a reinforcement provided in the body structure of the vehicle in the state of supporting the fuel tank. According to this constitution, it is possible to eliminate the need for a component part for the exclusive use of joining the cover, in this way achieving a reduction in the number of component parts, and to firmly support the cover. The invention as specified in claim 4 is characterized, in addition to the constitution of the invention as stipulated in any of claims 1 to 3, in which a luggage box covered with the riding seat is placed in the front side of the fuel tank disposed on the upper side of a rear wheel, the mounting portion of the pump and the fuel pump are arranged in a front portion on one of the left and right sides of the fuel tank, either a front end portion on the other left and right side of the fuel tank or a portion of the rear end on the other left and right side of the luggage box is provided with a circuit breaker to pass the hoses extended from the side of the fuel pump within a space between a front portion of the fuel tank and a rear portion of the luggage box, and the hoses are n arranged in the state inclined in a form of approximately U shape open on one side in the left-right direction on the rear side of the luggage box. According to this inventive constitution of claim 4, it is possible to arrange the fuel pump in a deep position in the fuel tank, and gently place the hoses. Mainly, while a central portion in the left-right direction of the fuel tank remains superficial due to the arrangement of the fuel tank on the upper side of the rear wheel, the arrangement of the fuel pump on one of the left and right sides of the fuel tank makes it possible to arrange the fuel pump in a deep position in the fuel tank. In addition, the hoses extended from the fuel pump are passed through the circuit breaker provided in either the front end portion on the other of the left and right sides of the fuel tank or the rear end portion on the other side left and right of the luggage box, and are arranged in the inclined state in the form of U-shape approximately. Therefore, despite the presence of the luggage box on the front side of the fuel tank, it is possible to make the hoses moderately inclined instead of sharply inclined, and to gently place the hoses. In addition, the invention as specified in claim 5 is characterized, in addition to the constitution of the invention as stipulated in any of claims 1 to 4, because the positions receiving load of the seat to make it possible to receive the seat Mounting fits on the top wall of the fuel tank at a variety of locations on the periphery of the pump mounting portion. According to this constitution, even when the saddle seat sinks under the action of a large load, it is possible to receive the saddle load from the upper wall of the fuel tank in the variety of locations at the periphery of the pump mounting portion . Therefore, it is possible to limit the deformation of the mounting seat, and to prevent the load on the side of the mounting seat acting on the cover. Mode for Carrying Out the Invention Now, a mode for carrying out the present invention will be described below, based on the embodiments of the invention shown in the accompanying drawings.

Figures 1 to 18 illustrate an embodiment of the present invention, wherein Figure 1 is a global side view of a motorcycle; Figure 2 is a perspective view of a central portion in the front-back direction of the motorcycle in the condition in which a cover of the vehicle body is removed; and Figure 3 is a side view of a motor and a consumption system; Figure 4 is an enlarged sectional view taken along line 4-4 of Figure 3; Figure 5 is an enlarged view taken along the arrow 5 of Figure 3; Figure 6 is a sectional view taken along line 6-6 of Figure 5; Figure 7 is a rear elevation of an air filter taken along the arrow 7 of Figure 3; Figure 8 is a sectional view taken along line 8-8 of Figure 7; Figure 9 is a view taken along the arrow 7 of Figure 3; Figure 10 is a horizontal view of an inlet pipe and a fuel injection valve; Figure 11 is a sectional view taken along line 11-11 of Figure 10; Figure 12 is a sectional side view vertically of a rear portion of the motorcycle; Figure 13 is a sectional view taken along line 13-13 of Figure 12; Figure 14 is a sectional view taken along line 14-14 of Figure 13; Figure 15 is an enlarged perspective view of a fuel tank, a fuel pump and a cover; Figure 16 is an enlarged sectional view taken along line 16-16 of Figure 13; Figure 17 is a sectional view taken along line 17-17 of Figure 16; and Figure 18 is an enlarged sectional view taken along line 18-18 of Figure 13. First, in Figure 1, a vehicle body structure 20 of this motorcycle includes an arrival duct 21 for giving directional support to a front cleat 24, a main structure 22 extending back and down from the arrival duct 21, and a left-right pair of rear structures 23, provided in connection with a rear portion of the main structure 22 and that extend backwards and upwards. A front wheel F is supported by axes at the lower ends of the front cleat 24, a steering handle similar to a rod 25 is connected to an upper portion of the front cleat 24, and a front bumper 26 to cover the upper side of the front wheel WF is supported on the front fork 24.

Referring also to Figures 2 and 3, the main structure 22 is composed of an angular pipe that is tetragonal in cross section, the plates of the hanging support 27 are respectively joined to both side surfaces of an intermediate portion of the main structure 22, and the pivot plates 28 are attached to both side surfaces of a rear portion of the main structure 22. An E motor with a cylinder axis adjusted slightly forward and upward, for example, is placed on the underside of the structure 22. The motor E is suspended from the structure of the vehicle body 20 in order to be supported by the plate of the suspension bracket 27 and the pivot plates 28. A portion of the front end of a rear cleat 29 is assembled from rotating manner in the pivot plates 28, and a rear wheel WR is supported by shafts at the rear ends of the rear cleat 29 In addition, a rear cushion 30 is provided between the rear structures 23 of the vehicle body structure 20 and the rear cleat 29. The engine E constitutes a power unit P together with a transmission M, and the output power of the transmission M is transmitted to the rear wheel WR via a chain 31. Furthermore, a regulating body 32 and an air filter 33 on the front side relative to the regulating body 32 are placed on the upper side of the engine E, and a fuel tank 34A is placed on the upper side of the rear wheel WR. The upper side of a luggage box 35A, which is positioned on the front side of the fuel tank 34A, and the fuel tank 34A are covered openly and closed with a mounting seat 36, which is, for example, double type. A vehicle body cover made of synthetic resin 38 to cover the body structure of the vehicle 20, as part of the engine E, the regulating body 32, the air filter 33, the fuel tank 34A and the luggage box 35A it is attached to the structure of the vehicle body 20. The cover of the vehicle body 38 consists of front side covers 39 placed on the left and right sides of the main structure 22; post protections 40 provided in connection with the front portions of both front side covers 39, in order to cover the portions of the driver's post from the front side; a front upper cover 41 provided in connection with both protections of the post 40, in order to cover the arrival duct 21 from the front side; an upper cover of the main structure 42 provided in connection with the upper front cover 41 in order to cover the arrival duct 21 from the rear side and cover the main structure 22 from the upper side; bottom covers 43 provided in connection with lower portions of both front side covers 39; and rear side covers 44 for covering the fuel tank 34A and the luggage box 35A from both side sides. The riding seat 36 is positioned in upper portions of the rear side covers 34 in a condition that can be opened and closed in order to allow luggage to be stored in and out of the luggage box 35A and the fuel supply inside. of the fuel tank 34A, and a rear bumper 35 to cover the upper side of a rear portion of the rear wheel WR is provided in connection with the rear side covers 44. In Figure 4, the regulator body 32 has a structure in the which a throttle valve 46 for regulating the amount of air supplied to the engine E is rotatably mounted on a body 47, and a throttle cable 49 is wrapped around and connected to a throttle drum 48 disposed on a side side of the body 47 in connection with the throttle valve 46. The body 47 has an inlet path 50 extending in the front-rear direction of the motorcycle, and the regulating valve 46 disposed in an intermediate portion of the inlet path 50 is fixed to a valve shaft 51 rotatably mounted on the body 47 in order to cross the inlet path 50. In addition, the regulating drum 48 it is disposed on the left side of the body 47 in a state directed towards the operating direction of the motorcycle, and the regulating drum 48 is fixed to one end of the valve shaft 51. In addition, a return spring 52 for decentering the valve regulator 46 towards the closing side is provided between the regulating drum 48 and the body 47, and the regulating valve 46 is operated to rotate to the open side when the driver of the motorcycle pulls the regulating cable 49 against the spring force of the spring. return 52. A shell 55 for housing the control unit 53 is attached to a lateral surface opposite the regulating drum 48, mainly a right lateral surface, of the body 47. The shell 55 of a main body of the casing 56 attached to the body 47, and a lid plate 57 to seal an opening portion of the main body of the casing 56. The control unit 53 includes an electronic circuit (not shown) made in a circuit substrate 54 secured between the main body of the casing 56 and the lid plate 57. A sensor of the regulator 58 for detecting the opening of the regulating valve 46 is connected to the substrate of the circuit 54. The sensor of the regulator 58 consists of a rotor 59 loosely and rotatably fitted in the main body of the casing 56, conductive brushes 60, 60 projected from the rotor 59 towards the substrate side of the circuit 54, and resistors 61 printed on the substrate of the circuit 54 for the purpose of bringing the conductive brushes 60, 60 to a sliding contact between them. The rotor 59 is silently adjusted to the other end of the valve shaft 51 in such a way that relative rotation is impossible. The rotor 59 is rotatably mounted on a support shaft 62 which is projected onto the cover plate 57 and penetrates through the circuit substrate 54 coaxially with the axis of the valve 51. With this regulator sensor 58, the opening of the regulating valve 46 is detected on the side of the control unit 53 as a voltage between both ends of the resistor 61. In addition, the body 47 is provided with an open through hole 63 within the inlet path 50, on the ascending side in relation to the regulating valve 46. A detection cylinder 64, having a cylindrical shape with a thin bottom and penetrating through the through hole 63 with its closed portion at the end of the tip facing the track inlet 50, is provided as a body with the main body of the casing 56. An intake gas temperature sensor 67 consists of a thermal resistance 65 in close contact with the inner surface of the closed portion of the end of the cylinder tip of detection 64, and a terminal 66 extending from the thermal resistance 65 inside the detection cylinder 64 and connected to the substrate of the circuit 5. The control unit 54 is designed in such a way as to detect a variation in the voltage according to a variation in the resistance of the thermal resistance 65 expecting a variation in the temperature of the intake gas. Further, after the intake gas temperature sensor 67 is contained in the detection cylinder 64, the detection cylinder 64 is filled with an encapsulating agent 68 formed of a synthetic resin. In this way, the sensor of the regulator 58 and the intake gas temperature sensor 67 are connected to the substrate of the circuit 54 of the control unit 53 attached to the regulator body 47, and, therefore, it is possible to cut the cables extremely shorts for connecting the sensor of the regulator 58 and the temperature sensor of the intake gas 67 to the control unit 53. An upper portion of the shell 55 extends through an upper portion of the body 47 beside the regulating drum 48, and a coupler 69 open to the same side as the regulating drum 48 is formed as a body with the main body of the shell 56 of the shell 55. Upon observing Figure 3, a cleaner housing made of synthetic resin 70 used by the filter air 33 is formed by a main body of the bowl-shaped box 71 supported by the main structure 22, and a bowl-shaped cover 72 open opposite to the main body of the box 71, which s and coupling together with a filter unit 73 fixed between the peripheral portions thereof. The interior of the cleaner box 70 is divided by a non-clean chamber 74 on the side of the cover 72 and a clean chamber 75 on the main body side of the box 71. A 7G connector tube for driving the clean air from the air filter 33 to the regulator body 32 is fixedly connected to the main body of the box 71 of the cleaner housing 70 in such a way that the rising end of the connector tube 76 projects into the clean chamber 75. A upstream connecting cylinder 47a (see Figure 4) provided as a body with the body 47 of the regulating body 32 is fitted to a portion of the downstream end of the connector tube 76. In addition, a fixing band 77 for fixedly holding a Connection condition of the connector tube 76 to the regulator body 32 is wound around the descending end portion of the connector tube 76. With the fixing band 77 fitted by a screw member 78, provided that the connecting tube 76 is connected to the regulating body 32, it is held in a fixed manner. Referring to Figures 5 to 8 also, a protective plate 79 for covering from the front side at least the regulating drum 48 of the regulating body 32 positioned on the lower rear side of the air cleaner 33 is provided by integral molding with a portion bottom of the main body of the box 71 in the cleaner housing 70 of the air cleaner 33, and the coupler 69 included in the housing 55 in the regulating body 32 is also positioned on the side of the regulating drum 48, so that the coupler 69 is also covered with the protective plate 79 from the front side. The protective plate 79 is provided with an operative opening portion 80, for example of circular shape, in a position corresponding to the fixing band 77. A cover 81 placed on the front side of the protective plate 79 so that the opening portion operative 80 can be opened and closed, is attached to the protective plate 79. The protective plate 79 is provided with a support hole 82 in a position remote from the operative opening portion 80. A support shaft 83 which must pass through the The support hole 89 projects integrally in the cover 81, which is formed of rubber, in such a way that the diameter on the end side of the tip thereof can be reduced as it passes through the support hole 82. The support shaft 83 is provided integrally at the end of its tip with a variety of gear ratchets 83a for spring engagement with the rear surface of the protective plate 79 in the periphery. of the support hole 82. Mainly, the cover 81 is attached to the protective plate 79 so as to be able to rotate about the axis of the support hole 82, between a position for closing the operative opening portion 80 as indicated by the solid line in Figure 5 and a position to open the operative opening portion 80 as indicated by the chain line in Figure 5. In addition, the lid 81 is provided integrally with a projected adjustment cylinder 84 divided into a variety of portions in the circumferential direction, in order to be fitted with springs in the operative opening portion 80 in the condition in which the operative opening portion 80 is closed. A variety of gear ratchets 84a provided at the end of the tip of the adjusting cylinder 84 are engaged in springs with the rear surface of the protective plate 79 at the periphery of the operative opening portion 80, whereby the condition is maintained closed from the operative opening portion 80 closed with the lid 81. The protective plate 79 is provided at its lower end, and in a portion corresponding to the main cover 87 of the motor E, with a circuit breaker 79a for inserting a tool 86 as per example a key in the main cover 87 at the time of carrying out, for example, the adjustment of a rocker arm of an operating system by valve in the motor E separating the main cover 87. In addition, a guard of the regulating drum made of resin 161 for covering the regulating drum 48 of the regulating body 32 from a lateral side, in this embodiment from the left side, it is attached to the air stream 33. Specifically, a mounting flange 71a for holding an upper portion of the guard of the regulating drum 161 with a screw member 162 is provided integrally on the left side of the rear surface of the main body of the box 71 in the cleaner box 70 of the air cleaner 33, and the guard plate 79 is provided in its lower left portion with a rectangular gear hole 163 for engaging an approximately L-shaped gear ratchet 161a provided in a lower portion of the guard of the regulating drum 161. An upper portion of the guard of the regulating drum 161 having its lower portion in contact with the rear surface of the protective plate 79 is fitted to the mounting flange 71a with the member of the screw 162, while the gear ratchet 161a engages in the gear hole 163, whereby the guard of the regulating drum 161 is mounted to the air filter 33. In addition, a discharge pipe 164 connected to a discharge port (not shown) on the cylinder head 88 of the engine E is connected to a lower portion of the cylinder head 88, the downward end of a pipe 165 for supplying secondary air Fresh within a discharge gas flowing through the discharge port inside the discharge pipe 164 connects to the main deck 87, and an upward end of the pipe 165 is connected to a secondary air control valve 166 supported by the engine E. In addition, the secondary air control valve 166 is connected to a filter 167 supported by the main structure 22. descending end of an air supply tube 168 extending forward from the filter 167 along the main structure 22 is connected to the filter 167, and the rising end of the air supply tube 168 extends to the upper side of the air filter of the cover 33 to be exposed, inside the cover of the vehicle body 38, to the atmosphere.

In addition to this, the rear surface of the main body of the box 71 in the wiper housing 70 of the air cleaner 33 is provided in its upper portion with an adjustment slot 169 to fit a portion near the upstream end of the supply tube of the air cleaner. air 168 therein, and a gear pin 170 for contacting and engaging with the air supply tube 168 at the adapted portion in the adjustment slot 169 from the upper side projects integrally into the upper portion of the back surface. Primarily, the portion near the upward end of the air supply tube 168 fits into the adjustment slot 169 and the gear pin 170 comes into contact with and meshes with it from the top side, whereby the portion near the The upward end is maintained in the upper portion of the rear surface of the main body of the case 71. Therefore, it is not necessary to attach a fastener for the exclusive use of keeping the air supply tube 168 in the main structure 22. A downstream connection cylinder 47b (Refer to Figure 4) integrally incorporated by the body 47 of the regulator body 32 is connected to the upstream end of an inlet pipe 89 whose downward end is connected to an upper portion of the cylinder head 88 in the engine E. Referring also to Figures 9 to 11, the inlet pipe 89 is inclined in a form of configuration C approximately in order to connect the regulating body 32 and the cylinder head 88 disposed on the lower rear side of the regulator body 32 between yes. The inlet pipe 89 'is covered with a cover member made of rubber 90 in the manner of baking on the surface thereof, and the downstream connection cylinder 47b of the regulator body 32 is tightly fitted on a cylinder member of the cylinder. connection 90a provided as a body with the cover member 90, whereby the regulator body 32 is connected to the inlet pipe 89. A fuel injection valve 91 for injecting a fuel into the cylinder head 88 is attached to the inlet pipe 89, and the opening and closing operations of the fuel injection valve 91 are controlled by the control unit 53 contained in and fixed to the housing 55 mounted to the body 47 of the regulating body 32.

The inlet pipe 89 is provided with a mounting hole 92 open to the side of the cylinder head 88, and a tip end portion of the fuel injection valve 91 is tight against the gas in the orifice of the cylinder. assembly 92 so that its tip end faces the interior of the inlet pipe 89. In addition, a portion of the rear end of the fuel injection valve 91 is tight against liquids in a cap 93, and the cap 93 is fitted to the inlet pipe 89. Mainly, the fuel injection valve 91 is mounted to the inlet pipe 89 in a secured manner between the inlet pipe and the cap 93. The cap 93 is provided with a passage of fuel supply 94 having its downward end communicated with the interior of a portion of the rear end of the fuel injection valve 91, and a tube connection path from the input side 95 communicating with the upstream end of the fuel supply passage 94 is connected by the flange to the cap 93. The cap 93 is provided with a return passage 96 branched from an intermediate portion of the supply passage of fuel 94, and a pressure regulating valve 97 is connected to the return passage 96. A housing of the valve 98 of the pressure regulating valve 97 is placed in parallel to the fuel injection valve 91 in a position adjacent to the fuel injection valve 91, and a portion of the upward end of the valve casing 98 is attached to the cap 93, with a connection piping 99 sealed against liquids with the return passage 96 interposed between the ascending end portion and the cap 93. Mainly, the pressure regulating valve 97 is positioned to extend downward from the cap 93 so that it does not project to the sides from the cap 93. In addition, a cover 101 is connected to a lower portion of the valve casing 98, with a peripheral portion of a diaphragm 100 secured between the cover 101 and the valve casing 98. A valve chamber 102 communicated with the return passage 96 is formed between the valve casing 98 and the diaphragm 100, and a spring chamber 103 is formed between the diaphragm 100 and the cover 101.

On the other hand, the valve casing 98 is integrally provided with a portion of the return side connection piping 104 that extends to the same side as the inlet connection piping 95 connected by the flange to the cap 93 on the underside of the inlet connection pipe 95. A cylindrical valve seat member 105 communicated with the connection side portion of the return side 104 is adapted and joined in order to face the central portion. of the valve chamber 102 and having a part of the latter projected towards the side of the diaphragm 100. A valve element 106 capable of being seated at an end portion, on the side of the valve chamber 102, of a valve seat member 105 is slightly rotationally supported on a central portion of diaphragm 100, and a spring 107 placed in a compressed state between cover 101 and diaphragm 100 is contained in the spring chamber 103 in order to exert a spring force towards the side to bend the diaphragm 100 towards the side of the valve chamber 102. In the pressure regulating valve 97 described above, when the pressure of the liquid on the side of the chamber of the valve 102 for decentering the diaphragm 100 towards the side of the spring chamber 103 exceeds the force of the spring on the side of the spring chamber 103 to de-center the diaphragm 100 towards the side of the chamber the valve 102, the diaphragm 100 is bent towards the side of the spring chamber 103, the valve member 106 is divided from the seat member of the valve 105, and the pressure of the liquid in the fuel supply passage 94 communicated to the chamber of the valve 102 through the return passage 106, that is, the supply pressure of the fuel to the fuel injection valve 91, is regulated in such a way so as not to reach to exceed a set pressure. Further, since the pressure regulating valve 97 is positioned in the position adjacent to the fuel injection valve 91 as mentioned above, it is possible to reduce the length of the fuel supply passage 94 that connects the fuel injection valve 91 and the pressure regulating valve 97 to each other, and preventing the fuel flowing through the fuel supply passage 94 from being heated to a high temperature. In Figures 12 to 14, the fuel tank 34A is formed by a lower tank half 110 and an upper tank half 111 coupled together, and an outwardly projecting flange portion 112 integrally formed in the circumference total of a connection portion between both halves of the tank 110 and 111. The fuel tank 34A is supported by both rear structures 24 of the vehicle body structure 20. The rear structures 23 are provided with reinforcements 113 to support a front portion of fuel tank 34A, and support flanges 114 to support a rear portion of fuel tank 34A. The portion of the flange 112 mounted on the reinforcements 113 is adjusted to the reinforcements 113 by bolts 115 and welded nuts 116, and the portion of the flange 112 mounted on the support flanges 114 is adjusted to the support flanges 114 by bolts 117. Meanwhile, the fuel tank 34A is positioned on the upper side of the rear wheel WR, and a lower portion of the fuel tank 34A, that is, a lower portion of the lower tank half 110 is formed in such a way that its central portion in the left-right direction protrudes upwards, in order to avoid interference with the rear wheel WR. Mainly, the fuel tank 34A is formed in such a way that both lateral portions 34L and 34R in the left-right direction thereof are deeper than a central portion 34C thereof. Referring also to Figure 15, a fuel pump 118 is contained in the fuel tank 34, and the fuel pump 118 is attached to an upper wall of the fuel tank 34A, that is, to the middle of the upper tank 111. A mounting portion of the flat pump 119 suspended downwardly is provided in a front portion of the upper wall on one of the left and right sides (in this embodiment, a left side portion 34L) of the fuel tank 34A, while a portion of the hose arrangement 120 inclined forward and downward is provided in a front portion of the upper wall in the other of the left and right sides (in this embodiment, a portion of the right side 34R) of the fuel tank 34A. The mounting portion of the pump 119 is provided with, for example, an elliptical insertion port 121 for inserting the fuel pump 118 into the fuel tank 34A. Mainly, the fuel pump 118 is positioned on one of the left and right sides (in this embodiment, the left-hand portion 34L) of the fuel tank 34A. A filter (not shown) is connected to a lower portion of the fuel pump 118, a filter chamber 122 to cover the filter is supported by the lower portion of the fuel pump 118 in order to maintain a level of the surface of the predetermined liquid in the filter chamber 122, and a float 123 for detecting the liquid surface of the fuel in the fuel tank 34A is supported by the fuel pump 118. An elliptical mounting plate 124 is welded to the surface of the pump mounting portion 119 so as to surround the insertion hole 121. The mounting plate 124 includes a variety of, for example, six lower level portions 124a to be welded to the mounting portion of the pump. the pump 119, and a variety of, for example, six upper level portions 124b raised in a trapezoid shape, which are arranged alternately in connection in the and the lower level portions 124a are welded to the upper surface of the mounting portion of the pump 119.

Referring to Figures 16 and 17 as well, the bolts 125 are welded to the lower surfaces at the upper level portions 124b so as to project upwards from the upper level portions 124b. Bolts 125 are passed through an outer peripheral portion of a lid plate in the form of an elliptical flat plate 126 provided at the upper end of the fuel pump 118 in order to close the insertion hole 121 from the upper side , and the nuts 127 engaged with the screw with bolts 125 are fixed, whereby the cover plate 126, mainly the fuel pump 118, is mounted to the mounting portion of the pump 119. In addition, a packing made of rubber 128 is interposed between the mounting portion of the pump 119 and the cover plate 126. The packing 128 is formed in an elliptical configuration and has opening portions 129 wherein the portions of the upper level 124b of the plate Assembly 124 should be placed respectively. By adjusting the nuts 127 engaged with the bolt with the bolts 125, the gasket 128 is secured between the lower level portions 124a of the mounting plate 124 and the cover plate 126, and is secured between the mounting portion of the gasket 125. pump 119 and cover plate 126 on the inside and outside of mounting plate 124. A discharge pipe 130 inclined within an L-shaped shape is approximately connected to the upper end of fuel pump 118, and the fuel pump 118 discharges the fuel through the discharge pipe 130. A return pipe 131 which penetrates through the cover plate 126 in a liquid-tight manner and which extends on a side side of the pump of fuel 118 to a lower portion of the interior of the fuel tank 34A is attached to the cover plate 126, and the return pipe 131 is inclined within an L-shaped configuration approximately on the upper side of the cover plate 126 in the same manner as the discharge pipe 130. In addition, the discharge pipe 130 and the return pipe 131 are placed parallel to each other as they are directed towards the front right side in the upper side of the cover plate 126. The rising end of a fuel hose 132 is connected to the discharge pipe 130, while the downward end of a return cylinder 133 having its rising end connected to the portion of the return side connection pipe 104 of the pressure regulating valve 97 is connected to the return cylinder 131. Meanwhile, a portion of the flange 112 at the front end of the fuel tank 34A along the direction of signaling the discharge pipe 130 and the return cylinder 131, mainly, at the right front end of the fuel tank 34A, with the fuel pump 118 placed in a portion The front left side thereof is provided with a circuit breaker 135 to form a space for the fuel hose 132 and the return hose 133 to pass between the fuel tank 34 and the luggage case 35A arranged on the front side of the fuel tank. 34A fuel The fuel hose 132 and the return hose 133 extend downward from the discharge pipe 130 and the return pipe 131 through the space over the hose portion 120 and through the circuit breaker 135, and are tilted toward the back side of the luggage box 35A in order to extend to the left side of the luggage box 35A. Mainly, the fuel hose 132 and the return hose 133 connected to the discharge pipe 130 and the return pipe 131 are arranged in the inclined state, on the rear side of the luggage box 35A, within a configuration form in U approximately open towards the left side. In this way, on the left side of the luggage box 35A, the fuel hose 132 and the return hose 133 extend forward, parallel to each other. The downstream end of the fuel hose 132 is connected to a high pressure filter 136 supported on a front portion of one of the rear structures 23 by a support member 134 on the front left side of the equipment box 35A. The fuel hose 137, the rising end of which is connected to the high pressure filter 136, is connected to the inlet side connection pipe 95 in the cap 93 in order to supply the fuel to the fuel injection valve 91. In addition, the high pressure filter 136 is supported in the rear structure 23 by the support member 134 in a position that allows easy maintenance by removing the upper cover of the main structure 42. In this way, the fuel hose 132 and the return hose 133 are connected to the cap 93 and the pressure regulating valve 97. The fuel of the fuel pump 118 circulates reciprocally towards the pressure regulating valve 97 positioned in the vicinity of the fuel injection valve 191 Therefore, it is possible to avoid raising the temperature of the fuel, even when the engine E is placed on the underside of the hose. e fuel 132 and the return hose 133. The pump mounting portion 119 and the manner portion 120 are covered, from the upper side, with a cover 138 to cover the upper end of the fuel pump 118 , the fuel hose 132, and the return hose 133. The cover 138 is fitted to a pair of support members 139, 139 fixed to the cover plate 126 of the fuel pump 118. Mainly, the cover 138 is attached to the cover plate 126 through the support members 139. , 139. The support members 139, 139 are disposed on opposite sides, with the insertion hole 119 of the fuel tank 34A between them. Support members 139, 139 are fitted to the cover plate 126 of the fuel pump 118 by two pairs of bolts 125 and nuts 127 of the six pairs of bolts 125 and nuts 127 for adjusting the cover plate 126 to the mounting plate 124, and are formed in this manner in order to rise upwards from the cover plate 126.

In addition, the welded nuts 140, 140 are attached to the interior surfaces of the upper portions of the support members 139, 139 and the screw members 141, 141 passed through the cover 138 mounted on the support members 139, 139 and through the support members 139, 139 are engaged with screws with the welded nuts 140, 140. Furthermore, a right end portion of the cover 138 disposed in a position spaced from the fuel pump 118 is supported by the reinforcement 113. attached to the rear structure of the right side 23 in order to support a right front portion of the fuel tank 34A, and, as shown in Figure 18, is secured to the reinforcement 113 by the bolt 115 and the weld nut 116, together with the portion of the flange 112 in a right front portion of the fuel tank 34A. Meanwhile, as shown in Figure 12, a lower portion of the luggage box 35A is supported on a support plate 142 placed between the front portions of the rear structures 23 through a pair of mounting members 143, and, as shown in Figure 18, the upper left and right portions of a rear portion of the luggage box 35A are supported on the front portions of the reinforcements 113 through the mounting members 144. The mounting members 144 are interposed respectively between support flanges 35A provided integrally with the upper left and right ends of a rear portion of the luggage box 35A and the front portions of the reinforcements 113. The metallic cylindrical collars 145 pass through the support flanges 35A, the washers made of synthetic resin 149 that contact the upper surfaces of the support flanges 35A, and the mounting members 144. The metal washers 148 are placed in contact with the washers 149 and the upper ends of the collars 145. The persons 147 possess portions of the gear and stop head 147A to be engaged with the washers 148 they pass through the washers 148 and the collars 145, and, by adjusting the bolts 147 engaged with screw with the welded nuts 146 attached to the front lower surfaces of the reinforcements 113, the left and right stops of the rear portion of the casing luggage 35A are supported on the reinforcements 113. The front end of the saddle 36. is supported openly and closed on a central upper portion of the front end of the luggage box 35A through a hinge 150. A receiving plate 151 to receive a rear portion of the saddle 36 when the saddle 36 is closed, is provided between the rear portions of both rear structures 23, and a pair of elastic members 153 fixed to the lower surface of a lower plate 36A of the mounting seat 36 are placed in contact with the receiving plate 151. In addition, both ends of a grip rail 152 are attached to the receiving plate 151. Meanwhile, when the load exerted on the riding seat 36 in its closed state is comparatively small, an intermediate portion in the front rear direction of the saddle 36 would not make contact with the fuel tank 34A. However, when the load is increased to bend the mounting seat 36 downward, the load receiving positions of the seat for receiving the load on the mounting seat 36 are adjusted in a variety of locations at the periphery of the mounting portion. of the pump 199, in this embodiment, three locations in an upper wall of the fuel tank 34 ?. In this case, three elastic members 154A, 154B, 154C fixed to the lower surface of the lower plate 36A of the mounting seat 36 can make contact with the upper wall of the fuel tank 34A in the load receiving positions of the seat. Incidentally, a structure can be adopted in which the elastic member 154C is omitted, such that the elastic members 154A and 154B make contact with the upper wall of the fuel tank 34A in a pair of the seat receiving positions of the seat . In addition, a fuel injection port (not shown) for supplying the fuel within the fuel tank 34A is provided in an approximately central portion of the upper wall of the fuel tank 34A, and a fuel injection cap 155 for closing the fuel tank. Fuel injection port is removably attached to the upper wall of the fuel tank 34A. Next, the functions of this first embodiment will be described. Since the protective plate 79 for covering at least the regulating drum 48 of the regulating body 32 from the front side is provided as a single body with the cleaner housing 70 of the air filter 33, it is possible to avoid splashing water or mud through the front wheel WR and splash the regulating drum 48, avoiding an increase in the number of component parts. Further, as the control unit 53 for controlling the operation of the fuel injection valve 91 for supplying the fuel to the engine E is attached to the body 47 of the regulating body 32 and the control unit 53 is also covered with the protective plate 79. from the front side, it is possible to increase the water-proof and sludge-proof performances of the control unit 53. Furthermore, as the guard of the regulating drum 161 to cover the regulating drum 48 of the regulating body 32 from a side side (in this embodiment, the left side) is attached to the cleaner housing 70 of the air filter 33, it is possible to avoid splashing water or mud into the regulating drum 48 from a side side of the regulator body 32. Additionally, as the The regulating plate 79 is provided with the operative opening portion 80 in a position corresponding to the fixing band 77 for connecting the regulating body 32 to the connecting tube 76 in order to driving the clean air from the air filter 33 and the cover plate 81 to make the operating opening portion 80 open and closed, is attached to the protective plate 79, can be facilitated, despite the presence of the plate protective 79, for inserting the fingers from the front side through the operative opening portion 80 to hold the fixing band 77 and adjusting and unlocking the fixing band 77 from a side side of the protective plate 79, and it is possible to improve the functionality at the time of maintenance and at the time of assembly. Further, as the mounting portion of the pump 119 for mounting the fuel pump 118 to be contained in the fuel tank 34A is provided in the upper wall of the fuel tank 34A in the suspended downward state and the mounting portion of the the pump 119 is covered with the cover 138 from the upper side, it is possible to avoid interference with the mounting seat 36 and increase the degree of freedom in adjusting the height of the mounting seat 36, even when the connection portions of the the fuel hose 132, the return hose 133 and the like in relation to the fuel pump 118 are positioned on or in the mounting portion of the pump 119. Additionally, as the mounting portion of the pump 119 is covered with the cover 36 from the side When the mounting seat 36 is opened to supply the fuel within the fuel tank 34A or a similar purpose, it is possible to safely avoid the wrong contact with the aforementioned connection portions, to protect the connection portions for the connection to the fuel pump 118, in order to prevent the connection portions from being exposed, and in this way achieve an excellent appearance. Further, as the cover plate 126 provided at the upper end of the fuel pump 118 in order to close from above the insertion hole 121 provided in the mounting portion of the pump 119 to insert the fuel pump 118 inside of the fuel tank 34A is attached to the mounting portion of the pump 119 and the cover 138 is attached to the cover plate 126 through the support members 139, 139, it is not necessary to provide a special member to fix the cover 138 next to fuel tank 34A, and in this way it is possible to reduce the number of component parts. As the right front portion of the cover 138 spaced from the fuel pump 118 is secured together with the fuel tank 34A, the reinforcements 113 provided in the rear structures 23 of the body structure of the vehicle 20 with the In order to support the fuel tank 34A, it is not necessary to provide a component part for the exclusive use of mounting the cover 138, and it is possible to achieve a reduction in the number of component parts and give a firm support to the cover 138. In addition, as the mounting portion of the pump 119 and the fuel pump 118 are placed in a front portion on one of the left and right sides (in this embodiment, the left side portion 34L) of the fuel tank 34A placed in the upper side of the rear wheel R, the fuel pump 118 can be placed in a deep position in the fuel tank 34A. Mainly, the central portion 34C in the left-right direction of the fuel tank 34A is shallow due to the arrangement of the fuel tank 34A on the upper side of the rear wheel WR, and the. disposition of the fuel pump 118 on one of the left and right sides of the fuel tank 34A makes it possible to place the fuel pump 118 in a deep position in the fuel tank 34A. In addition, the front end portion on the other of the left and right sides (in this embodiment, the right side portion 34R) of the fuel tank 34A is provided with the circuit breaker 135 through which the fuel hose 132 and the return hose 133 extended from the side of the fuel pump 118, are passed between the fuel tank 34A and the rear portion of the luggage box 35A provided on the front side of the fuel tank 34A, and the fuel hose fuel 132 and return hose 133 are placed in the inclined state in a U-shaped shape approximately open on one of the left and right sides (in this embodiment, the left side) on the rear side of the box. 35A luggage This ensures that, despite the presence of the luggage box 35A on the front side of the fuel tank 34A, the fuel hose 132 and the return hose 133 are moderately tilted instead of steeply inclined, and the fuel hose 132 and the return hose 133 can be placed smoothly.

In addition, the seat-receiving positions of the seat which make it possible to support the mounting seat 36 on the upper wall of the fuel tank 34A are adjusted in a variety of locations on the periphery of the mounting portion of the pump 119, and the load on the mounting seat 36 can be supported on the upper wall of the fuel tank 34A in the variety of locations on the periphery of the mounting portion of the pump 119 even when the mounting seat 36 sinks under the action of a load big. Therefore, it is possible to restrict the deformation of the mounting seat 36, and prevent the load exerted from the side of the mounting seat 36 acting on the cover 138. Figure 19 illustrates a second embodiment of the present invention. As shown, a structure can be adopted wherein a mounting portion of the pump 119 and a fuel pump 118 are placed in a front portion of one of the left and right sides (in this embodiment, the left side). ) of a fuel tank 3 B, and a portion of the rear end on the other of the left and right sides (in this embodiment, the right side) of the luggage box 35B disposed on the front side of the fuel tank 3 B is provided with a circuit breaker 157 for passing the hoses 132, 133 extended from the side of the fuel pump 118 within a space between a front portion of the fuel tank 34B and a rear portion of the luggage case 35B. According to the second embodiment, also, the same effects as those of the first embodiment can be obtained.

Figure 20 illustrates a third embodiment of the present invention, in which the upper end of a fuel pump 118 contained in a fuel tank 34C disposed on the front side of a luggage case 35C is assembled to a portion of pump assembly 119 'provided in a rear upper wall of a central portion in the left-right direction of the fuel tank 34C, and the mounting portion of the pump 119' is covered with a cover 138 'from the upper side . Additionally, a portion of the front end on one side in the left-right direction of the luggage case 35C is provided with a circuit breaker 158 for passing a fuel hose 132 and a return hose 133 extended from the side of the fuel pump 118 within a space between the front end portion of the luggage box 35C and a rear portion of the fuel tank 34C, and the fuel hose 132 and the return hose 133 are disposed in an inclined state within a form of U-shaped configuration approximately open on the other side in the left-right direction (in this embodiment, the right side) on the rear side of the fuel tank 34C.

Although the embodiments of the present invention have been described above, this invention is not limited to the embodiments described above, and various modifications to the design are possible without departing from the invention as specified in the claims. . As described above, according to the invention as specified in claim 1, although the connection portion for connection to the fuel pump is disposed in the mounting portion of the pump, it is possible to avoid interference with the saddle, and increase the degree of freedom in adjusting the height of the saddle. In addition, it is possible to protect the connecting portion for connection to the fuel pump when the saddle is opened, and to obtain an excellent appearance. In addition, according to the invention as specified in claim 2, it is possible to eliminate the need for a special member to fix the cover to the side of the fuel tank, and achieve a reduction in the number of component parts. According to the invention as specified in claim 3, it is possible to eliminate the need for a component part for the exclusive use of mounting a cover, thereby achieving a reduction in the number of component parts, and to give a firm support to the deck. According to the invention as specified in claim 4, it is possible to place the fuel pump in a depth position in the fuel tank, and to smoothly arrange the hoses. Furthermore, according to the invention as specified in claim 5, it is possible to limit the deformation of the mounting seat, and prevent the load exerted from the side of the mounting seat acting on the cover. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a global side view of a motorcycle according to a first embodiment.

Figure 2 is a perspective view of a central portion in the front-rear direction of the motorcycle in the condition in which the cover of the vehicle body is removed. Figure 3 is a side view of a motor and an intake system. Figure 4 is an enlarged sectional view taken along line 4-4 of Figure 3.

Figure 5 is an enlarged view taken along the arrow 5 of Figure 3. Figure 6 is a sectional view taken along line 6-6 of Figure 5. Figure 7 is a rear elevation of an air filter taken along the arrow 7 of Figure 3. Figure 8 is a sectional view taken along line 8-8 of Figure 7. Figure 9 is a view taken along the arrow 9 of Figure 3. Figure 10 is a sectional view of an inlet pipe and a fuel injection valve. Figure 11 is a sectional view taken along line 11-11 of Figure 10. Figure 12 is a vertically sectional side view of a rear portion of the motorcycle. Figure 13 is a sectional view taken along line 13-13 of Figure 12. Figure 14 is a sectional view taken along line 14-14 of Figure 13. Figure 15 is a view in enlarged perspective of a fuel tank, a fuel pump and a cover.

Figure 16 is an enlarged sectional view taken along line 16-16 of Figure 13. Figure 17 is a sectional view taken along line 17-17 of Figure 16. Figure 18 is a enlarged sectional view taken along line 18-18 of Figure 13. Figure 19 is a sectional view, corresponding to Figure 13, of a second embodiment. Figure 20 is a view of the plane of the fuel tank and a luggage box in a third embodiment. Explanation of the Symbols 20 ... vehicle body structure 34 ?, 34B, 34C ... fuel tank 35 ?, 35B ... luggage box 36 ... seat mount 113 ... reinforcement 118 .. fuel pump 119, 119 '... pump mounting section 132 ... fuel hose 133 ... return hose 135, 157 ... circuit breaker 138, 138' ... cover

Claims

CLAIMS 1. A structure for disposing the fuel system in a motorcycle that includes a fuel tank (34A, 34B, 34C) mounted on a vehicle body structure (20), and a fuel pump (118) attached to a upper wall of said fuel tank (34A to 34C), the aforementioned fuel pump (118) is contained in said fuel tank (34? to 34C), and the upper side of the said fuel tank (34A to 34C) is covered with a saddle (36), where the mentioned fuel pump (118) is mounted to a pump mounting portion (119, 119 ') provided in the aforementioned upper wall of the said fuel tank (34A a 34C) in a downward suspended state, and the mentioned mounting portion of the pump (119, 119 ') is covered with a cover (138, 138') from the upper side.
2. A structure for disposing the fuel system in a motorcycle as specified in claim 1, characterized in that the aforementioned mounting portion of the pump (119, 119 ') is provided with an insertion hole (121) for insertion the mentioned fuel pump (118) inside said fuel tank (34A to 34C), a cover plate (126) provided at the upper end of the mentioned fuel pump (118) in order to close the fuel orifice. said insert (121) from the upper side is attached to the aforementioned mounting portion of the pump (119, 119 '), and the aforesaid cover (138, 138') is attached to the aforementioned cover plate (126).
3. A structure for disposing the fuel system in a motorcycle as specified in claim 1 or 2, characterized in that in a position spaced from said fuel pump (118), said cover (138) is attached to a reinforcement (113) provided in said vehicle body structure (20) in the state of supporting said fuel tank (34A to 34C).
4. A structure for disposing the fuel system in a motorcycle as specified in any of claims 1 to 3, characterized in that a luggage box (5 ?, 35B) covered with the aforementioned mounting seat (36) is placed on the front side of said fuel tank (34A, 34B) disposed on the upper side of a rear wheel (WR), the aforementioned mounting portion of the pump (119) and the mentioned fuel pump (118) are positioned in a front portion on one of the left and right sides of the said fuel tank (34A, 34B), either a front end portion in. the other left and right side of the said fuel tank (34 ?, 34B) or a portion of the rear end on the other of the left and right sides of the mentioned luggage box (35A, 35B) is provided with a circuit breaker (135, 157) to pass the hoses (132, 133) extended from the side of the mentioned fuel pump (118) within a space between a front portion of said fuel tank (34A, 3 B) and a rear portion of the aforementioned luggage box (35A, 35B), and the aforementioned hoses (132, 133) are disposed in an inclined state in a U-shaped shape approximately open on one side in the left-right direction on the rear side of the aforementioned luggage box (35A, 35B).
5. A structure for disposing the fuel system in a motorcycle as specified in any of claims 1 to 4, characterized in that the load receiving positions of the seat to make it possible to receive the aforementioned mounting seat (36) are adjusted in the upper wall of the fuel tank