WO2016052020A1 - 車両の燃料タンク構造 - Google Patents
車両の燃料タンク構造 Download PDFInfo
- Publication number
- WO2016052020A1 WO2016052020A1 PCT/JP2015/074155 JP2015074155W WO2016052020A1 WO 2016052020 A1 WO2016052020 A1 WO 2016052020A1 JP 2015074155 W JP2015074155 W JP 2015074155W WO 2016052020 A1 WO2016052020 A1 WO 2016052020A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel tank
- liquid level
- fuel
- vehicle
- level detection
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/073—Tank construction specially adapted to the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
- B62J1/12—Box-shaped seats; Bench-type seats, e.g. dual or twin seats
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J35/00—Fuel tanks specially adapted for motorcycles or engine-assisted cycles; Arrangements thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
- G01F23/36—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means
Definitions
- the present invention relates to a vehicle fuel tank structure capable of accurately detecting the remaining amount of fuel.
- a liquid level detection sensor provided in a fuel tank is provided with a float arm so as to be rotatable and the fuel level is detected by moving the float up and down via the float arm.
- fuel tanks have various shapes specific to the vehicle depending on the capacity and mounting position on the vehicle, and the movable range of the float and float arm is determined according to the fuel tank shape, its mounting direction and the fuel level.
- the mounting position of the liquid level detection sensor main body is designed.
- a fuel tank of a small vehicle disposed in a space such as below a passenger seat often has a shape that is slender and slanted forward and backward.
- the present invention has been made in view of the above prior art, and in a fuel tank mounted on a vehicle with at least an upper surface inclined, the float angle of the float arm can be increased without being restricted by the shape of the float arm.
- An object of the present invention is to provide a fuel tank structure for a vehicle that can accurately detect the remaining amount of fuel in the fuel tank.
- the present invention provides a vehicle in which a fuel tank is mounted on a vehicle with at least an upper surface inclined, and a liquid level detection device is attached to the inside of the fuel tank to detect the remaining amount of fuel.
- a liquid level detection sensor constituting the liquid level detection device, and a float arm having one end side pivotably connected to the liquid level detection sensor and a float attached to the other end side,
- the float arm is attached to the liquid level detection sensor so as to be able to swing up and down according to the liquid level in the fuel tank, and the liquid level detection sensor swings the float arm swinging up and down.
- the fuel tank is configured to output an electrical signal corresponding to the liquid level according to the angular position, and the fuel tank is provided with a bulging portion having its upper surface bulged and formed on the inner surface of the bulging portion. Recess Inside a fuel tank structure for a vehicle, characterized in that before the level of the liquid surface detection highest liquid level to be detected by the sensor is set.
- the liquid level detection sensor may detect a vertical position of the float, and the float arm may be formed linearly.
- a fuel filler port of the fuel tank is disposed higher than the bulging portion, and the highest liquid level is defined by a horizontal plane including a position of a lower end opening of the fuel filler port, The protruding part can swell up to the horizontal plane.
- the liquid level detection device is attached to a fuel pump unit attached to the fuel tank, and the fuel pump unit is arranged with its center closer to one side with respect to the vehicle left-right center, The liquid level detection device is arranged on the other side.
- the fuel tank is disposed between the lower part of the passenger seat and the upper part of the rear wheel, and the lower surface of the fuel tank is provided with the rear wheel at the time of swinging.
- An upwardly-facing dent to avoid interference is provided extending forward and backward at the left and right center of the vehicle of the fuel tank, and the position at the lowest liquid level of the float is set above the dent in a side view. You can also.
- a recessed portion is formed in the seat bottom plate of the riding seat facing the upper surface of the fuel tank so as to escape interference with the bulging portion.
- the bulge portion of the fuel tank is disposed only on the side of the left and right sides of the vehicle where the float of the liquid level detection device is located, and is a recess in the seat bottom plate. May be formed symmetrically on both the left and right sides.
- the seat bottom plate is provided with a tool fixing portion for holding the vehicle maintenance tool, and the recess portion of the seat bottom plate is attached to the tool fixing portion and the fuel tank.
- the fuel pump unit is formed so as to be positioned between the portion facing the fuel pump unit, and the mounting position of the fuel pump unit to the fuel tank is formed on a mounting seat surface lower than the upper surface of the adjacent fuel tank.
- a bulging portion is formed on the upper surface of the fuel tank, and the fuel tank formed by the bulging portion Since the inside of the recess on the inner surface is the position of the float of the liquid level detection device when the fuel is at the maximum liquid level level, the state of the highest liquid level of the fuel is detected by the float that has moved upward This makes it possible to increase the swing angle of the float arm without being restricted by the shape of the float arm, and to accurately detect the remaining amount of fuel.
- the float arm is linearly moved with the liquid level detection sensor of the liquid level detection device detecting the vertical position of the float. Even if it is formed in a shape, the maximum liquid level can be detected, and the liquid level detecting device can be made compact.
- the fuel filler port of the fuel tank is disposed higher than the bulge portion, and the maximum liquid level height is defined by the position of the lower end opening of the fuel filler port. It is possible to easily design the float position and the height of the bulge portion of the fuel tank.
- the center of the fuel pump unit is moved closer to one side of the fuel tank and the liquid level detection device is arranged closer to the other end.
- the liquid level detection device is arranged closer to the other end.
- the lower surface of the fuel tank is formed with an upward recess to avoid interference with the rear wheel, and the position of the float at the lowest liquid level of the actual fuel tank is at the bottom. Even when it is displaced from the upper part of the dent, the bulge is provided on the upper surface of the fuel tank and the maximum liquid level can be detected, so the liquid level detection range is from the lowest liquid level to the highest liquid level. Can take.
- the bulge portion that escapes the bulge portion of the fuel tank is formed in the seat bottom plate where the space between the fuel tank and the seat bottom plate is reduced by forming the bulge portion in the fuel tank.
- the bulging portion is formed only on the side where the float is located.
- the recessed portions of the seat bottom plate are formed symmetrically on the left and right sides, the right and left balance of the rigidity of the seat bottom plate can be achieved, and the uncomfortable feeling of sitting comfort can be reduced.
- the recessed portion of the seat bottom plate is disposed between the tool fixing portion of the seat bottom plate and the portion facing the fuel pump unit, the tool fixing portion is not provided even if the recessed portion is provided. It is provided at the rear of the recess and can be secured without sacrificing the installation space for the maintenance tool.Furthermore, the fuel tank is attached to an attachment seat that is one step lower than the upper surface of the adjacent fuel tank, so that the fuel pump unit can be expanded upward. It is possible to avoid the protruding portion from interfering with the sheet bottom plate or the like.
- FIG. 1 is a left side view schematically showing a vehicle body cover and a riding seat of a motorcycle according to an embodiment of the present invention.
- FIG. 2 is a side cross-sectional view of the vicinity of the left and right center line X of the motorcycle around the fuel tank and the riding seat of FIG. 1.
- FIG. 3 is a front cross-sectional view of the vicinity of a fuel tank and a riding seat as viewed in the direction of arrows III-III in FIG. 2. 2 corresponds to a cross section taken along the line II-II in FIG.
- FIG. 3 is a left side view of the fuel tank according to the present embodiment, and shows a tilted posture mounted on a motorcycle shown in FIG. 2.
- FIG. 2 is a side cross-sectional view of the vicinity of the left and right center line X of the motorcycle around the fuel tank and the riding seat of FIG. 1.
- FIG. 3 is a front cross-sectional view of the vicinity of a fuel tank and a riding seat as viewed in the direction of
- FIG. 5 is a top view of the fuel tank as viewed in the direction of arrows VV in FIG. 4 corresponds to a view taken along the line IV-IV in FIG.
- FIG. 3 is a left side view of the riding seat according to the present embodiment, and shows a posture attached to the motorcycle shown in FIG. 2.
- FIG. 7 is a bottom view of the riding seat as viewed in the direction of arrows VII-VII in FIG. 6. 6 corresponds to a view taken along the line VI-VI in FIG.
- the vehicle is a small vehicle such as a straddle-type vehicle having an internal combustion engine mounted on a body frame and provided with the fuel tank structure of the vehicle of the present embodiment, and specifically, a motorcycle.
- arrow FR indicates the front of the vehicle
- LH indicates the left side of the vehicle
- RH indicates the right side of the vehicle
- UP indicates the upper side of the vehicle.
- FIG. 1 is a left side view of a motorcycle 1 having a vehicle fuel tank structure according to an embodiment of the present invention, in which a vehicle body cover 29 and a riding seat 8 are simply illustrated by two-dot chain lines.
- a body frame 2 of a motorcycle 1 as a vehicle is connected to a head pipe 20, a pair of left and right main frames 21 extending obliquely downward and rearward from the head pipe 20, and a lower rear end of the main frame 21.
- a front fork 11 that supports the front wheel 10 is supported by a head pipe 20 so as to be steerable, and a steering handle 12 is connected to an upper portion of the front fork 11.
- a swing arm 14 that supports the rear wheel 13 is supported on the center frame 22 via a pivot bolt 15 so as to be swingable up and down.
- the internal combustion engine 3 is a water-cooled single-cylinder four-stroke cycle internal combustion engine. As shown in FIG. 1, the crankshaft 31 is oriented in the vehicle width direction, and a power unit including a transmission is provided in the crankcase 30. It is supported by a support bracket 21a of the main frame 21 and a plurality of support brackets 22a of the center frame 22 (only the bottom end portion is shown). The power of the internal combustion engine 3 is transmitted to the rear wheel 13 via a rear wheel drive sprocket 16 and a rear wheel drive chain 17 fitted to an output shaft 32 parallel to the crankshaft 31. A radiator 33 is disposed in front of the internal combustion engine 3 to cool the cooling water.
- a rear cushion 18 is interposed between the front side of the seat rail 23 and the swing arm 14. Between the left and right seat rails 23, a pipe-like second cross member 25B is provided adjacent to the rear cushion mounting portion 23a. An air cleaner 50 or the like is attached in front of the second cross member 25B, and a fuel tank 6 is attached in the rear of the second cross member 25B.
- a reinforcing pipe 26 is bridged between the second cross member 25 ⁇ / b> B and the middle of the side frame 24.
- 27 is a main stand
- 28 is a side stand.
- a riding seat 8 is attached from above the air cleaner 50 to above the fuel tank 6.
- the vehicle body frame 2, the fuel tank 6, the air cleaner 50, and the like are covered with a vehicle body cover 29 schematically shown by a two-dot chain line in FIG.
- the first cross member 25 ⁇ / b> A is bridged over the upper rear ends of the left and right main frames 21 so as to be close to the front end of the air cleaner 50.
- the first cross member 25 ⁇ / b> A has a left and right central portion that supports the front end portion 81 of the seat bottom plate 80 of the riding seat 8 and allows the rear portion of the riding seat 8 to swing up and down.
- a dynamic support bracket 25Aa is provided.
- a third cross member 25C is bridged between the left and right seat rails 23 so as to straddle the upper part of a fuel pump unit 7 (described later) of the fuel tank 6.
- a left and right connecting portion 25D is provided behind the rear end of the fuel tank 6.
- the air cleaner 50 is located below the driver seat portion 8a at the front portion of the passenger seat 8.
- the air cleaner 50 includes a dirty chamber 52 having an intake duct 51 in the upper portion, a clean chamber 54 in communication with a connecting tube 53 at the lower portion, and a cleaner element 55 between the dirty chamber 52 and the clean chamber 54.
- the connecting tube 53 extends forward and is connected to an intake port (not shown) on the rear surface of the internal combustion engine 3 via a throttle body and an intake pipe (not shown).
- a fuel injection device (not shown) is attached to the intake pipe and injects fuel from the fuel tank 6 toward the intake port.
- an exhaust pipe 58 extending from the front surface of the internal combustion engine 3 passes through a lower portion of the internal combustion engine 3 to a muffler 59 at the rear of the vehicle body.
- the fuel tank 6 is composed of a tank upper half 6A and a tank lower half 6B.
- the upper and lower mating surfaces are configured so that flanges 60a and 60b around each half face each other.
- 60 is seam welded and formed as an integral fuel tank 6 with a cavity inside.
- the fuel tank 6 is provided with a total of four fuel tank mounting portions 61 in the front, rear, left, and right directions. By the fuel tank mounting portions 61, the fuel tank 6 is attached to the seat rail 23 in a space between the left and right seat rails 23.
- the flange portion 60b is placed, arranged in a posture inclined forward and substantially along the seat rail 23, and fastened to the left and right seat rails 23.
- a pump unit insertion hole 62 for inserting and mounting the fuel pump unit 7 from above and a pump unit mounting seat surface 63 as a mounting seat surface are provided on the front upper surface of the fuel tank 6, and a fuel filler opening is provided on the rear upper surface. 64 is provided.
- the pump unit mounting seat 63 is set at a position lower than the fuel tank upper surface 67 adjacent thereto.
- the fuel tank 6 has a shape that is long in the front-rear direction (see FIG. 5) that is mounted on the motorcycle 1 while being tilted forward.
- the fuel pump unit 7 is inserted into the fuel tank 6 from above into a pump unit insertion hole 62 provided on the front upper surface side of the fuel tank 6, and is attached to a pump unit mounting seat 63 around the pump unit insertion hole 62. It is concluded.
- the fuel pump unit 7 includes a fuel filter 71 at the lower part of the pump main body 70 inserted into the fuel tank 6, and the fuel sucked into the pump main body 70 through the fuel filter 71 is supplied to the fuel from the pump unit insertion hole 62.
- the fuel is supplied from the discharge pipe 72 protruding to the upper part of the tank 6 to the above-described fuel injection device via the fuel supply pipe 73 (see FIGS. 1 and 3).
- a harness 74 for signal wiring such as an electric wiring for driving the fuel pump unit 7 and an electric signal output from the liquid level detection sensor 90 is provided. Is connected.
- the pump unit insertion hole 62, the pump unit mounting seat surface 63, and the fuel pump unit 7 are on the left side with respect to the vehicle body left-right center line X.
- a sensor support portion 75 that supports the liquid level detection sensor 90 of the liquid level detection device 9 extends obliquely from the lower right of the pump body 70 toward the upper right rear. As shown in FIG. 2, the liquid level detection sensor 90 is supported at the tip of the sensor support portion 75.
- the liquid level detection sensor 90 is rotatably provided with a rotation shaft 91 whose axis Y is perpendicular to the vehicle body left-right center line X and oriented horizontally rightward.
- the pivot shaft 91 is connected and fixed to one end of a linearly formed float arm 92, and the float arm 92 is supported by the liquid level detection sensor 90 together with the pivot shaft 91 so as to be swingable.
- a float 93 is attached to the other end side of the float arm 92.
- the float arm 92 rotates the pivot shaft 91 of the liquid level detection sensor 90, while the vehicle body centerline.
- the right side rear side of the liquid level detection sensor 90 is swung up and down along a plane parallel to X and perpendicular to the axis Y of the rotation shaft 91, and the swing angle position of the float arm 92 with respect to the liquid level detection sensor 90 is It is set according to the liquid level.
- the liquid level detection sensor 90 is detected by the detection element with the swing angle position of the float arm 92 as the rotation angle position of the rotation shaft 91, whereby the liquid level detection sensor 90 corresponds to the liquid level height, that is, the remaining fuel level.
- the electric signal is output, and the fuel remaining amount is displayed on a fuel meter (not shown).
- a fuel meter not shown. 2 and 3
- the positions of the float arm 92 and the float 93 when the fuel reaches the maximum liquid level Lh are indicated by a two-dot chain line and become the minimum liquid level.
- the position at the time of hitting is indicated by a solid line.
- the fuel tank upper surface 67 is provided with a fuel filler port 64 higher than the bulging portion 65, and the rear portion of the riding seat 8 is connected to the first portion.
- the rocking support bracket 25Aa on the cross member 25A is rotated and raised with the fulcrum as a fulcrum, so that the oiling operation can be performed.
- a lower end opening 64 a that opens to the fuel tank 6 is formed at the lower end of the fuel filler port 64.
- the maximum liquid level Lh of the fuel in the fuel tank 6 is defined by a horizontal plane Lh including the position of the lower end opening 64a of the fuel filler port 64, and the bulging portion 65 of the fuel tank 6 swells up to the horizontal plane Lh. .
- the fuel filler port 64 of the fuel tank 6 is arranged higher than the bulging portion 65 and the maximum liquid level Lh is defined at the position of the lower end opening 64a of the fuel filler port 64, the float 93 of the maximum liquid level Lh The setting of the position and the height of the bulging portion 65 of the fuel tank 6 becomes easy, and the design of the fuel tank 6 is easy.
- the fuel pump unit 7 is attached to the fuel tank 6 toward the left side with respect to the vehicle body left-right center line X as the vehicle left-right center, and the liquid level detection device 9 is The fuel pump unit 7 is supported by the sensor support portion 75 of the pump main body 70 so as to be arranged on the right side with respect to the left-right center line X. Since the center of the fuel pump unit 7 is arranged closer to the left side of the fuel tank 6 and the liquid level detection device 9 is arranged closer to the right side of the fuel tank 6, the fuel pump unit 7 is disposed in the limited fuel tank 6. A space for arranging the tank 6 and the liquid level detection device 9 is secured.
- the fuel tank 6 has a surrounding fuel tank upper surface 67 on the right side of the fuel tank upper surface 67.
- a bulging portion 65 that is further bulged is provided, and the position of the float 93 when the fuel reaches the maximum liquid level Lh is set inside the recess 66 formed on the inner surface of the bulging portion 65. (See FIG. 2). Therefore, even if the fuel tank 6 is mounted on the motorcycle 1 with the upper surface inclined, when the fuel reaches the maximum liquid level Lh, the fuel tank 6 moves upward and the recess 66 on the rear surface of the bulging portion 65 is moved.
- the float 93 that reaches the inside of the engine can detect the state of the maximum liquid level Lh of the fuel, and the swing angle of the float arm 92 can be increased without being restricted by the shape of the float arm 92, so that the remaining fuel level can be detected accurately. Can be done well.
- the liquid level detection sensor 90 is positioned within the bulging portion of the fuel tank 6 so that the highest liquid is detected.
- the liquid level can be detected at the surface level Lh, and the liquid level detecting device 9 can have a compact structure.
- the fuel tank 6 is disposed below the riding seat 8 and above the rear wheel 13.
- the fuel tank 6 is schematically shown by a two-dot chain line 13 '.
- the rear wheel 13 may approach the fuel tank 6 by swinging up and down. Therefore, in order to avoid interference with the fuel tank 6 of the rear wheel 13 when swinging up and down, the fuel tank 6 is provided with a concave portion 68 that extends upward and backward in the center of the left and right (see FIG. 2, see FIGS. 3, 4, and 5).
- the concave portion 68 directed upward is formed on the lower surface of the fuel tank 6 in order to avoid interference with the rear wheel 13, the actual position of the float 93 at the lowest liquid level of the fuel tank 6 is determined.
- the position of the float 93 at the lowest liquid level is seen in a side view so that it can be detected from the lowest liquid level to the highest liquid level Lh even when displaced from the bottom and above the recess 68. Is set above the recess 68.
- the bulging portion 65 is provided on the upper surface of the fuel tank 6 and the highest liquid level Lh can be detected, the liquid level detection range can be taken from the lowest liquid level to the highest liquid level Lh.
- the riding seat 8 has the front end portion 81 of the seat bottom plate 80 attached to the first cross member 25 ⁇ / b> A with the swing support bracket 25 ⁇ / b> Aa as a fulcrum.
- three pairs of left and right support pads 82 ⁇ / b> C, 82 ⁇ / b> T, and 82 ⁇ / b> D are provided in order from the front on the rear rear surface of the seat bottom plate 80.
- the support pad 82C is placed on the third cross member 25C, the support pad 82T is placed on the seat support portion 69 (see FIG.
- a U-shaped seat lock bar 83 is erected from the seat bottom plate 80 downward in the middle and slightly forward of the left and right support pads 82D, and is provided on the vehicle body frame 2 in the vicinity of the left and right connecting portions 25D (not shown).
- the riding seat 8 is fixed by engaging with the locking mechanism.
- the riding seat 8 is formed by providing a cushion material 84 on the seat bottom plate 80 and covering the surface with a covering material 85.
- the lower part of the driver's seat part 8a at the front part is formed with a front recessed part 86 that is directed upward substantially avoiding the air cleaner 50 below the driver's seat part 8a, and then supported at the rear part according to the third cross member 25C.
- a pad 82C is attached, and at the rear part thereof, an upwardly recessed portion 87 is provided so as to face the upper surface of the fuel tank 6 and escape interference with the bulging portion 65 of the fuel tank 6.
- the bulging portion 65 of the fuel tank 6 escapes to the seat bottom plate 80 where the gap between the fuel tank 6 and the seat bottom plate 80 becomes small if it is left as it is.
- the recessed portion 87 By forming the recessed portion 87, a gap with the bulging portion 65 of the fuel tank 6 can be secured, and the seat seating height can be suppressed from being increased, and the vehicle footing can be maintained.
- the bulging portion 65 of the fuel tank 6 is arranged only on the right side of the left and right of the vehicle center (the vehicle body left-right center line X) where the float 93 of the liquid level detection device 9 is located.
- the recessed portions 87 of the seat bottom plate 80 are formed symmetrically on both the left and right sides.
- the bulging portion 65 is formed only on the right side where the float 93 is formed as in the present embodiment
- the recessed portions 87 of the seat bottom plate 80 symmetrically on both the left and right sides, The right and left balance of the rigidity of the seat bottom plate 80 can be balanced, and the bending of the cushion material 84 can also be balanced left and right, so that the uncomfortable feeling of sitting comfort can be reduced or prevented.
- a rear recess 88 facing the fuel filler port 64 of the fuel tank 6 and facing upward is formed on the rear side of the recess 87 of the seat bottom plate 80, and support pads 82T are provided on the left and right thereof.
- a tool fixing portion 89 that holds the maintenance tool 19 of the motorcycle 1 is provided on the lower surface between the recess portion 88 and the lower portion 88. That is, the recess 87 of the seat bottom plate 80 is formed so as to be positioned between the tool fixing portion 89 and the portion facing the fuel pump unit 7 attached to the fuel tank 6. Even if provided, the tool fixing portion 89 is provided behind the recessed portion 87, and the mounting space for the maintenance tool 19 can be secured without sacrificing.
- the pump unit mounting seat surface 63 is formed one step lower than the adjacent fuel tank upper surface 67 and is the mounting position of the fuel pump unit 7 to the fuel tank 6, so that the fuel pump unit 7 It is avoided that the bulging portion upward, for example, the discharge pipe 72, the harness 74, and the mounting portion thereof interfere with the seat bottom plate 80, the third cross member 25C, and the like.
- the rear depression 88 is a boundary 8c between the driver's seat 8a and the passenger's seat 8b, and contributes to raising the cushion material 84 at the boundary 8c and reinforcing the seat middle. ing.
- the characteristic configuration of the liquid level detection structure of the fuel tank 6 of the motorcycle 1 of the present embodiment and the operation and effect thereof will be described together. That is, the fuel tank 6 is mounted on the motorcycle 1 with the upper surface inclined, and the liquid level detection device 9 is mounted inside the fuel tank 6 to detect the remaining fuel level.
- a liquid level detection sensor 90 constituting the liquid level detection device 9 and a float arm 92 having one end side pivotably connected to the liquid level detection sensor 90 and a float 93 attached to the other end side are provided.
- the float arm 92 is attached to the liquid level detection sensor 90 so as to be able to swing up and down in accordance with the liquid level in the fuel tank 6.
- the liquid level detection sensor 90 outputs an electrical signal corresponding to the liquid level according to the swing angle position of the float arm 92 that swings up and down.
- the fuel tank 6 is provided with a bulging portion 65 whose upper surface is bulged, and the highest liquid level to be detected by the liquid level detecting sensor 90 is in a recess 66 formed on the inner surface of the bulging portion 65.
- Level Lh is set. For this reason, the float 93 moved upward allows the liquid level detection sensor 90 to detect the state of the maximum liquid level Lh of the fuel, and the swing angle of the float arm 92 can be increased without being restricted by the shape of the float arm 92. The remaining amount of fuel can be detected with high accuracy.
- the liquid level detection sensor 90 detects the vertical position of the float 93 and the float arm 92 is formed in a straight line, the float 93 is in the bulging portion 65 of the fuel tank 6 at the maximum liquid level Lh. Will be located. This makes it possible to detect the maximum liquid level Lh even if the liquid level detection sensor 90 of the liquid level detection device 9 detects the vertical position of the float 93 and the float arm 92 is formed linearly. And the liquid level detection apparatus 9 can be made into a compact structure.
- the fuel filler port 64 of the fuel tank 6 is disposed higher than the bulging portion 65, the highest liquid level Lh level is defined by a horizontal plane Lh including the position of the lower end opening 64a of the fuel filler port 64, and the bulging portion 65 is the same. It bulges up to the horizontal plane Lh. This makes it possible to easily design the float 93 position at the maximum liquid level Lh and the height of the bulging portion 65 of the fuel tank 6.
- the liquid level detection device 9 is attached to a fuel pump unit 7 attached to the fuel tank 6, and the fuel pump unit 7 is disposed on the left side that is one side with respect to the left-right center line X of the vehicle body. Since the surface detecting device 9 is arranged on the right side which is the other side, the space for arranging the liquid level detecting device 9 in the space in the fuel tank 6 can be secured.
- a fuel tank 6 is disposed between the lower side of the passenger seat 8 and the upper side of the rear wheel 13, and the lower surface of the fuel tank 6 is positioned above to avoid interference with the rear wheel 13 during swinging.
- a facing recess 68 is provided to extend in the front-rear direction at the left and right center of the fuel tank 6, and the position of the float 93 at the lowest liquid level is set above the recess 68 in a side view.
- a recess 87 is formed in the seat bottom plate 80 of the riding seat 8 facing the upper surface of the fuel tank 6 so as to escape interference with the bulging portion 65 of the fuel tank 6.
- the bulging portion 65 of the fuel tank 6 is arranged only on the side of the left and right center line X where the float 93 of the liquid level detecting device 9 is located, and the recessed portion 87 of the seat bottom plate 80 is located on both the left and right sides. It is formed symmetrically.
- the recess 87 of the sheet bottom plate 80 is formed symmetrically on both the left and right sides, so that the sheet bottom plate 80 The right / left balance of rigidity can be achieved, and the uncomfortable feeling of sitting comfort can be reduced.
- the seat bottom plate 80 is provided with a tool fixing portion 89 that holds the maintenance tool 19 of the motorcycle 1, and the recessed portion 87 of the seat bottom plate 80 includes a tool fixing portion 89 and a fuel pump attached to the fuel tank 6. It is formed so as to be located between the portion facing the unit 7 and the mounting position of the fuel pump unit 7 to the fuel tank 6 is formed on the pump unit mounting seat surface 63 which is lowered by one step from the upper surface 67 of the adjacent fuel tank. Has been.
- the tool fixing portion 89 is provided behind the recess 87, and can be secured without sacrificing the installation space of the maintenance tool 19, and further lowered by one step from the upper surface 67 of the adjacent fuel tank
- the fuel tank 6 By attaching the fuel tank 6 to the pump unit mounting seat 63, it is possible to prevent the upward bulging portion of the fuel pump unit 7 from interfering with the seat bottom plate 80 and the like.
- the fuel tank structure of the vehicle according to one embodiment of the present invention has been described, the aspect of the present invention is not limited to the above-described embodiment, and may be implemented in various aspects within the scope of the gist of the present invention.
- the vehicle of the present invention is not limited to the motorcycle according to the embodiment, and may be a small vehicle in which the fuel tank is mounted on the vehicle with at least an upper surface inclined.
- the internal combustion engine of the vehicle is not limited to the water-cooled single-cylinder four-stroke cycle internal combustion engine of the embodiment, and may be any internal combustion engine that needs to have a fuel tank.
- the arrangement of the left and right of each device has been described specifically for illustration, for convenience of explanation, but the arrangement may be reversed to that shown in the above embodiment, and is included in the present invention. .
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Abstract
Description
ところで、燃料タンクは容量や車両への搭載位置等によって車両特有に様々な形状をなしており、燃料タンク形状およびその搭載方向と燃料液面レベルに応じて、フロートやフロートアームの可動範囲を決定して、液面検出センサ本体部の取付け位置を設計する。
例えば、下記特許文献1に示されるように、乗車用シート下方などの空間に配置される小型車両の燃料タンクでは、前後に細長くて傾斜する形状をなすことが多い。
しかしながら、そのフロートはフロートアームが液面検出センサ本体部と接続される接続点を中心にした振り子軌道を描くため、フロートが上下するためにはフロートアームを長くして屈曲させる必要がある。
ところが、そのようにフロートアームを長くすると、タンク内でフロートの移動できるための空間を長く、大きくとれるようにするため、燃料タンク形状と液面検出センサのレイアウトの見直しが必要となる場合がある。
そこで、そのような液面検出センサによる燃料タンクの残量検出において、フロートアームができるだけ短いままでも、フロートアームの揺動角を稼げて残量検出を精度よく行えることが望まれていた。
特許請求の範囲および本明細書の説明における前後左右上下等の向きは、本実施形態の燃料タンク構造を備えた車両の向きに従うものとする。本実施形態において車両は、車体フレームに内燃機関を搭載し本実施形態の車両の燃料タンク構造を備えた鞍乗型車両等の小型車両であり、具体的には自動二輪車である。
図中矢印FRは車両前方を、LHは車両左方を、RHは車両右方を、UPは車両上方を、それぞれ示す。
図1に示されるように、車両としての自動二輪車1の車体フレーム2はヘッドパイプ20と、ヘッドパイプ20から斜め下後方に延びる左右一対のメインフレーム21と、メインフレーム21の後端下部に連なり下方に延出する左右一対のセンターフレーム22と、メインフレーム21の後端上部に接続され、斜め上後方に伸びる左右一対のシートレール23と、センターフレーム22の中央部(内燃機関3の後方位置)に接続され、シートレール23の後部に掛け渡された左右一対のサイドフレーム24とを備えている。
前輪10を支持するフロントフォーク11が、ヘッドパイプ20で操向可能に支持され、フロントフォーク11の上部にはステアリングハンドル12が連結されている。また、後輪13を支持するスイングアーム14が、センターフレーム22に、ピボットボルト15を介して上下揺動可能に支持されている。
内燃機関3の動力は、クランク軸31と平行な出力軸32に嵌装された後輪駆動用スプロケット16と後輪駆動用チェーン17を介して後輪13に伝達される。
なお、内燃機関3の前方には、ラジエータ33が配置され、冷却水を冷却する。
27はメインスタンド、28はサイドスタンドである。
また、図1、図2に示されるように、エアクリーナ50の上方から燃料タンク6の上方に亘って乗車用シート8が取付けられている。
なお、車体フレーム2と、燃料タンク6やエアクリーナ50等は、図1に2点鎖線で略図示される車体カバー29で覆われる。
また、左右のシートレール23間には、燃料タンク6の後述の燃料ポンプユニット7の上部を跨ぐように第3クロスメンバー25Cが架け渡されている。燃料タンク6の後端より後方には左右連結部25Dが設けられている。
コネクティングチューブ53は、前方に延設され、図示しないスロットルボディ、吸気管を介して内燃機関3の後面の図示しない吸気ポートに接続する。吸気管には図示しない燃料噴射装置が取付けられ、燃料タンク6からの燃料を吸気ポートに向けて噴射する。
また、図1に示されるように、内燃機関3の前面から延出する排気管58は、内燃機関3の下方を通って車体後部のマフラー59に通じている。
燃料タンク6には前後左右計4箇所の燃料タンク取付け部61が設けられ、それらの燃料タンク取付け部61によって、燃料タンク6は、左右のシートレール23に挟まれた空間において、シートレール23にフランジ部60bを載置し、略シートレール23に沿って前傾傾斜した姿勢で配置され、左右のシートレール23に締結される。
燃料タンク6の前部上面には、燃料ポンプユニット7を上方から挿入装着するためのポンプユニット挿入孔62と、取付け坐面としてのポンプユニット取付け坐面63が設けられ、後部上面には給油口64が設けられている。
なお、ポンプユニット取付け坐面63は、それに隣接する燃料タンク上面67よりも一段下げた位置に設定されている。
燃料ポンプユニット7は、燃料タンク6内に挿入されたポンプ本体70の下部に燃料フィルタ71を備え、燃料フィルタ71を介してポンプ本体70内に吸入された燃料を、ポンプユニット挿入孔62から燃料タンク6上部に突出した吐出管72から、燃料供給管73(図1、図3参照)を介して前述の燃料噴射装置へ供給する。
なお、図3に示されるように、吐出管72の反対方向には、燃料ポンプユニット7を駆動する電気配線や、液面検出センサ90が出力する電気信号等の信号用配線のためのハーネス74が接続している。
ポンプ本体70の下部からは、液面検出装置9の液面検出センサ90を支持するセンサ支持部75が斜め右後上方に向かって延設されている。図2に示されるように、該センサ支持部75の先端部に液面検出センサ90が支持される。
液面検出センサ90は、軸線Yを車体左右中心線Xに垂直をなし、且つ水平右方に配向された回動軸91を回転自在に備えている。該回動軸91は直線状に形成されたフロートアーム92の一端側を連結固定し、フロートアーム92は回動軸91とともに液面検出センサ90に揺動自在に支持されている。フロートアーム92の他端側にはフロート93が取付けられている。
液面検出センサ90は、フロートアーム92の揺動角度位置を回動軸91の回転角度位置として検出素子が検知し、それによって液面検出センサ90は液面高さ、すなわち燃料残量に応じた電気信号を出力し、図示しない燃料メータに燃料残量を表示させる。
図2、図3において、フロートアーム92およびフロート93は、燃料が最高液面レベルLh(図2、図4参照)となった際における位置が2点鎖線により示され、最低液面レベルとなった際における位置が実線で示されている。
燃料タンク6内の燃料の最高液面レベルLhは、給油口64の下端開口64aの位置を含む水平面Lhで規定され、燃料タンク6の膨出部65は同水平面Lhに至るまで膨出している。
燃料タンク6の給油口64を膨出部65より高位に配置し、最高液面レベルLhを給油口64の下端開口64aの位置で規定するようにしたので、最高液面Lh時のフロート93の位置と燃料タンク6の膨出部65の高さの設定が容易となり、燃料タンク6の設計が容易である。
燃料ポンプユニット7はその中心を燃料タンク6の左側寄りに寄せて配置され、液面検出装置9は燃料タンク6の右側寄りに寄せて配置されているので、限られた燃料タンク6内に燃料タンク6と液面検出装置9を配置するスペースが確保されている。
したがって、燃料タンク6が自動二輪車1に上面が傾斜する状態で搭載されていても、燃料が最高液面レベルLhの状態になった際には、上方に移動し膨出部65裏面の凹部66の内部に至ったフロート93が燃料の最高液面レベルLhの状態を検知でき、フロートアーム92の形状の制約を受けずにフロートアーム92の揺動角を稼げて、燃料残量の検出を精度よく行うことができる。
そこで、上下揺動時の後輪13の燃料タンク6との干渉を避けるために、燃料タンク6には、上方に向けた凹み部68が、左右中央で前後に延びて設けられている(図2、図3、図4、図5参照)。
支持パッド82Cは第3クロスメンバー25C上に、支持パッド82Tは燃料タンク6のフランジ部60aのシート支持部69(図5参照)上に、支持パッド82Dは左右連結部25D上に、載置され、荷重が支持される。
なお、左右の支持パッド82Dの中間やや前方には、シート底板80から下方に向けてU字状のシートロックバー83が立設され、左右連結部25D近傍の車体フレーム2に設けられた図示しないロック機構に係合することで、乗車用シート8が固定される。
本実施形態のように、膨出部65がフロート93の位置する右側にのみ単一で形成された場合であっても、シート底板80の窪み部87を左右両側に対称に形成することで、シート底板80の剛性の左右バランスをとることができ、クッション材84の撓みを左右バランスさせることもでき、座り心地の違和感を削減ないし防止できるものとなる。
すなわち、シート底板80の窪み部87は、工具固定部89と、燃料タンク6に取付けられた燃料ポンプユニット7に面する部位との間に位置するように形成されているので、窪み部87を設けても工具固定部89は窪み部87後方に設けられることになり、整備工具19の取付けスペースを犠牲にせず確保することができている。
なお、後部窪み部88は、その上方が運転者用シート部8aと同乗者用シート部8bとの境部8cであり、境部8cのクッション材84の盛り上げとシート中間部の補強に寄与している。
すなわち、燃料タンク6が自動二輪車1に上面が傾斜する状態で搭載され、液面検出装置9が燃料タンク6の内部に取付けられて燃料残量を検出する自動二輪車1の燃料タンク6の液面検出構造において、液面検出装置9を構成する液面検出センサ90と、液面検出センサ90に一端側が揺動自在に連結されるとともに他端側にフロート93が取付けられたフロートアーム92とを備えている。本実施の形態では、フロートアーム92は、燃料タンク6内の液面高さに応じて上下に揺動可能に前記液面検出センサ90に取り付けられている。液面検出センサ90は、上下に揺動するフロートアーム92の揺動角度位置に応じて液面高さに対応する電気信号を出力するようになっている。燃料タンク6にはその上面を膨出させた膨出部65が設けられ、同膨出部65の内面に形成された凹部66の内部に、液面検出センサ90によって検出されるべき最高液面レベルLhが設定されている。
そのため、上方に移動したフロート93により、液面検出センサ90が燃料の最高液面レベルLhの状態を検知でき、フロートアーム92の形状の制約を受けずにフロートアーム92の揺動角を稼げて、燃料残量の検出を精度よく行うことができる。
例えば、本発明の車両は、実施形態の自動二輪車に限らず、燃料タンクが車両に少なくとも上面が傾斜する状態で搭載されるような小型の車両であればよい。また、車両の内燃機関は、実施形態の水冷単気筒の4ストロークサイクル内燃機関に限定されず、燃料タンクを備えることが必要な内燃機関であればよい。
また、各機器の左右の配置は、説明の便宜上、図示のものに特定して記載したが、上記実施形態に示すものと左右逆となる配置のものであってもよく、本発明に含まれる。
Claims (8)
- 燃料タンク(6)が車両(1)に少なくとも上面が傾斜する状態で搭載され、
液面検出装置(9)が前記燃料タンク(6)の内部に取付けられて燃料残量を検出する車両の燃料タンク構造において、
前記液面検出装置(9)を構成する液面検出センサ(90)と、
同液面検出センサ(90)に一端側が揺動自在に連結されるとともに他端側にフロート(93)が取付けられたフロートアーム(92)とを備え、
前記フロートアーム(92)は、前記燃料タンク(6)内の液面高さに応じて上下に揺動可能に前記液面検出センサ(90)に取り付けられ、
前記液面検出センサ(90)は、上下に揺動する前記フロートアーム(92)の揺動角度位置に応じて液面高さに対応する電気信号を出力するように構成され、
前記燃料タンク(6)にはその上面を膨出させた膨出部(65)が設けられ、同膨出部(65)の内面に形成された凹部(66)の内部に、前記液面検出センサ(90)によって検出されるべき最高液面レベル(Lh)が設定されたことを特徴とする車両の燃料タンク構造。 - 前記液面検出センサ(90)は、前記フロート(93)の上下方向位置を検出し、前記フロートアーム(92)は直線状に形成されたことを特徴とする請求項1に記載の車両の燃料タンク構造。
- 前記燃料タンク(6)の給油口(64)は、前記膨出部(65)より高位に配置され、前記最高液面レベル(Lh)は前記給油口の下端開口(64a)の位置を含む水平面(Lh)で規定され、前記膨出部(65)は同水平面(Lh)に至るまで膨出していることを特徴とする請求項1または請求項2に記載の車両の燃料タンク構造。
- 前記液面検出装置(9)は、前記燃料タンク(6)に取付けられる燃料ポンプユニット(7)に取付けられ、同燃料ポンプユニット(7)はその中心を車両左右中央(X)に対して一側寄りに配置され、前記液面検出装置(9)は他側寄りに配置されたことを特徴とする請求項1ないし請求項3のいずれか一項に記載の車両の燃料タンク構造。
- 前記燃料タンク(6)が乗車用シート(8)の下方、且つ後輪(13)の上方の間に挟まれて配置され、前記燃料タンク(6)の下面には、揺動時の前記後輪(13)との干渉を避ける上方に向けた凹み部(68)が、同燃料タンク(6)の車両の左右中央で前後に延びて設けられ、側面視で前記フロート(93)の最低液面レベル時の位置が前記凹み部(68)より上方に設定されたことを特徴とする請求項1ないし請求項4のいずれか一項に記載の車両の燃料タンク構造。
- 前記燃料タンク(6)の上面に面する乗車用シート(8)のシート底板(80)に、前記膨出部(65)との干渉を逃げるように、窪み部(87)が形成されたことを特徴とする請求項1ないし請求項5のいずれか一項に記載の車両の燃料タンク構造。
- 前記燃料タンク(6)の前記膨出部(65)は車両左右中央(X)に対して左右のうち前記液面検出装置(9)の前記フロート(93)が位置する側にのみ配置され、前記シート底板(80)の窪み部(87)は左右の両側に対称に形成されたことを特徴とする請求項6に記載の車両の燃料タンク構造。
- 前記シート底板(80)には、前記車両(1)の整備工具(19)を保持する工具固定部(89)が設けられ、
前記シート底板(80)の窪み部(87)は、前記工具固定部(89)と、前記燃料タンク(6)に取付けられた燃料ポンプユニット(7)に面する部位との間に位置するように形成され、
前記燃料ポンプユニット(7)の前記燃料タンクへ(6)の取付け位置が、隣接する燃料タンク上面(67)よりも一段下げた取付け坐面(63)に形成されたことを特徴とする請求項6または請求項7に記載の車両の燃料タンク構造。
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JP5230403B2 (ja) * | 2008-12-22 | 2013-07-10 | 本田技研工業株式会社 | 車両用燃料残量検出装置 |
JP5180860B2 (ja) * | 2009-01-29 | 2013-04-10 | 本田技研工業株式会社 | 車両用燃料タンクの残燃料量検出装置 |
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2015
- 2015-08-27 JP JP2016551646A patent/JP6251818B2/ja not_active Expired - Fee Related
- 2015-08-27 CN CN201580052821.2A patent/CN106715252B/zh active Active
- 2015-08-27 WO PCT/JP2015/074155 patent/WO2016052020A1/ja active Application Filing
-
2017
- 2017-03-15 PH PH12017500495A patent/PH12017500495A1/en unknown
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JPS5941728U (ja) * | 1982-09-11 | 1984-03-17 | 本田技研工業株式会社 | 小型車輌用燃料タンクの燃料検出装置 |
JPS63169391U (ja) * | 1987-04-24 | 1988-11-04 | ||
JPH01105760U (ja) * | 1988-01-11 | 1989-07-17 | ||
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JP2004182018A (ja) * | 2002-11-29 | 2004-07-02 | Honda Motor Co Ltd | 自動二輪車における燃料系配置構造 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018182542A1 (en) * | 2017-03-29 | 2018-10-04 | Honda Motor Company Limited | Fuel tank structure for motorcycle |
JP2020514188A (ja) * | 2017-03-29 | 2020-05-21 | 本田技研工業株式会社 | 自動二輪車用の燃料タンク構造 |
WO2022209142A1 (ja) * | 2021-03-30 | 2022-10-06 | 本田技研工業株式会社 | 鞍乗り型車両 |
JP7478904B2 (ja) | 2021-03-30 | 2024-05-07 | 本田技研工業株式会社 | 鞍乗り型車両 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2016052020A1 (ja) | 2017-06-22 |
PH12017500495A1 (en) | 2017-08-30 |
CN106715252B (zh) | 2019-04-05 |
CN106715252A (zh) | 2017-05-24 |
JP6251818B2 (ja) | 2017-12-20 |
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