JP2552446B2 - Fuel refueling device for scooter type vehicle - Google Patents

Description

The present invention relates to a fuel supply system for a scooter type vehicle.

[Conventional technology]

In this type of scooter type vehicle, it is common to arrange the fuel tank in the side cover below the seat,
It is configured to open the seat and refuel. Therefore, there is an inconvenience that the driver has to get off the vehicle at the time of refueling, and there is one disclosed in Japanese Utility Model Application Laid-Open No. 59-154480 as a response to this. This is because an injection pipe is provided on the rear surface of the fuel tank arranged below the seat, the injection port of this injection pipe is arranged near the inside of the opening provided on the upper part of the vehicle body cover, and the lid member is opened to refuel. It is a thing.

[Problems to be Solved by the Invention]

However, in such a structure, since the seat extends further rearward than the fuel tank, the injection pipe must be extended rearward from the rear surface of the fuel tank. For this reason, it is difficult to increase the angle of the injection pipe with respect to the horizontal direction, and if the vehicle body leans during cornering or handling while traveling, the fuel in the fuel tank may enter the injection pipe and leak from the breather hole. It was

[Means for solving the problem]

The present invention has been made in view of the above circumstances, and therefore provides a fuel refueling device for a scooter type vehicle that can refuel without opening a seat and that does not cause fuel leakage.

In the fuel supply system for a scooter type vehicle according to the present invention, a fuel tank formed in the side cover below the seat with a left-right width substantially equal to the left-right width of the side cover is such that the center in the left-right direction is the center in the left-right direction of the vehicle body. The fuel tanks are arranged so as to substantially coincide with each other, the fuel tank is extended to the rear of the seat, and a bulging portion projecting upward is provided in the extending portion, and the bulging portion has a linear shape having an inlet at an upper end. Of the fuel tank extends obliquely from above and laterally outside the fuel tank to face the inside of the bulging portion from the upper surface of the bulging portion, and the lower end is the lower edge of the bulging portion near the lateral center of the fuel tank. The inclination angle of the injection pipe, the intersection of the center line passing through the center of the fuel tank in the left-right direction and the oil level in the state of being filled with fuel so as to reach the lower edge of the injection pipe, Directly connecting the lower edge of the injection port of the injection tube Is set to be larger than the banking angle, the side cover is extended above the inlet, and an opening is provided at a portion corresponding to the inlet, and the front portion of the opening is pivotally supported by the side cover. A lid that can be opened and closed in the left-right direction is provided, and the lid locking device is arranged side by side with the injection pipe.

[Action]

In the present invention, the lid is opened to expose the injection port of the injection pipe to the outside of the vehicle body, and the fuel in the fuel tank enters the injection pipe by directing the injection pipe upward even when the vehicle body is tilted. Make it harder.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a side view showing a scooter provided with a fuel supply system for a scooter type vehicle according to the present invention, FIG. 2 is a perspective view showing the same main portion, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. 1, and FIG. 5 is a sectional view showing a part of FIG. 3 in an enlarged manner. In these figures, reference numeral 1 indicates a two-wheel scooter as a scooter type vehicle, which is provided with a low-floor, substantially plate-shaped footrest 4 between a steering handlebar 2 and a seat 3.

Reference numeral 5 denotes a frame extending in the front-rear direction, which is a steering shaft tube 5a.
And a front frame extending downward from the steering shaft tube 5a
5b, and a rear frame 5c formed of a pair of pipes branched from the front frame 5b to the left and right and arranged in parallel. The rear frame 5c is bent from the lower side of the footrest 4 to the upper side, and is bent to the rearward side below the front portion of the seat 3 to the upper side of the rear wheel 7 suspended by the unit swing type engine 6. It has been extended. A main stand 8 which pivots the scooter 1 in a standing state during parking is pivotally attached to a lower portion of the engine 6.

Reference numeral 10 denotes an iron plate fuel tank which is disposed below the seat 3 and is supported on the rear frame 5c, and is formed by welding a press-molded upper member and lower member. The fuel tank 10 is formed with a left-right width that is substantially equal to the left-right width of a side cover 20 described later, and is arranged so that the center in the left-right direction substantially coincides with the center in the left-right direction of the vehicle body. A center line passing through the center of the fuel tank 10 in the left-right direction is shown by an alternate long and short dash line a in FIG. Also this fuel tank
The reference numeral 10 extends to the rear of the seat 3 along the rear frame 5c, and a bulging portion 10a for allowing the expansion of fuel is provided in the extending portion so as to project upward.

Reference numeral 11 denotes a resin-made lubricating oil tank, which is held in a recessed portion provided on the right side of the bulging portion 10a of the fuel tank 10.
The upper surface of the bulging portion 10a of the fuel tank 10 and the lubricating oil tank 11
The upper surface of the injection pipe 12 for supplying the fuel F and the lubricating oil L
An injection pipe 13 for refueling is provided.

The injection pipe 12 is formed of a linear pipe material and extends toward the upper left, the injection pipe 13 extends toward the upper right, and has injection ports 12a and 13a at the upper end. .
The lower end is inserted into the tank through the insertion hole. Here, since the insertion hole of the fuel tank 10 can be processed at the same time when the upper member is press-formed, the processing process is simplified.

The structure of the injection pipe 12 will be described in more detail. As shown in FIG. 3, the injection pipe 12 is inclined so that it is inclined downward to the right when the vehicle body is viewed from the rear above the fuel tank 10. It extends and faces the inside of the bulging portion 10a from the upper surface of the bulging portion 10a. The lower end of the injection pipe 12 is positioned at the lower edge of the bulging portion 10a and near the center of the fuel tank 10 in the left-right direction.

In this way, by positioning the lower end of the injection pipe 12 at the lower edge of the bulging portion 10a, the entire inside of the bulging portion can be used as a fuel expansion space.

The inclination angle of the injection pipe 12 with respect to the horizontal direction is set to be larger than the banking angle indicated by θb in FIG. 3 in which the main stand 8 comes into contact with the road surface and the scooter 1 cannot further incline. More specifically, the point A where the oil level Fs in a state where the fuel F is fully injected so as to reach the lower edge of the injection pipe 12 and the center line a of the fuel tank 10 intersect,
The inclination angle θt of the line f passing through the point B at the lower edge of the inlet 12a shown in FIG. 5 with respect to the horizontal direction is the banking angle θb.
Has been made larger than.

Therefore, the inclination angle θf of the axis c of the injection tube 12 is larger than the inclination angle θt. At the same time, the inclination angle θl formed by the axis d of the injection pipe 13 is equal to the inclination angle θt.
Is set larger than. 14 and 15 are injection tubes 1
It is a cap capped on 2,13.

Reference numeral 20 denotes a resin side cover that covers the frame 5, the engine 6, the fuel tank 10, etc., and the rear peripheral wall has an inlet 12a,
It extends above 13a. A back support 21 that supports the waist of the driver is arranged above the rear portion of the side cover 20. The injection holes 12a, 13a are provided on the side surface of the side cover 20 at a position corresponding to the injection holes 12a, 13a.
Openings 22 and 23 are formed to expose the outside of the vehicle body. 24 and 25 are lids provided in these openings 22 and 23, and the lids 24 and 25 are pivot shafts 26 whose axial direction is directed upward.
The front portion is pivotally supported by the side cover 20 via the opening 22 and the opening 22
It is configured to open and close 3. In this way the lid 24,
If 25 is configured to be openable and closable in the left-right direction with the front part as the center of rotation, the lids 24 and 25 will not move from the front or the front even if they forget to close the lids 24 and 25 after refueling. The object that hits this will naturally close it.

A locking device 28 that locks the lid 24 on the side cover 20 side by operating a key 27 is attached to the rotating end side of the lid 24.
The locking device 28 is arranged side by side in front of and behind the injection tube 12 as shown in FIG. Ie injection tube
Since the locking device 28 can be arranged using the space beside 12, the fuel tank 10 can be enlarged while avoiding interference with the locking device 28.

Numerals 30 and 31 are guide members that cover the outer peripheral portions of the inlets 12a and 13a and the openings 22 and 23 to prevent fuel and lubricating oil leaked during refueling from flowing down into the vehicle body. 32 and 33 are hoses for collecting fuel and lubricating oil flowing down the guide members 30 and 31,
Although not shown, it is connected to a flywheel magneto chamber, an intake passage, a recovery tank, or the like.

In the fuel refueling device for a scooter type vehicle configured as described above, since the openings 22 and 23 are opened at the portions of the side cover 20 facing the inlets 12a and 13a, the lids 24 and 25 are opened and poured. The entrances 12a and 13a can be exposed to the outside of the vehicle body. Therefore, the lids 24, 25 that can be easily opened and closed can be opened for refueling without opening the seat 3 that is complicated to open and close.

Further, since the inlets 12a and 13a extend from the upper surfaces of the inflating portion 10a of the fuel tank 10 and the lubricating oil tank 11 at an inclination angle larger than the banking angle θb, the scooter 1 inclines during traveling or handling. Even in such a case, the injection pipes 12 and 13 can be always inclined upward. Therefore, the fuel F and the lubricating oil L are filled with the injection pipe 1
It is possible to make it difficult to enter the inside of 2, 2 and prevent leakage from the breather holes of the caps 14, 15 covered with the injection ports 12a, 13a.

〔The invention's effect〕

As described above, in the fuel refueling device for a scooter type vehicle according to the present invention, the fuel tank formed in the side cover below the seat with a left-right width substantially equal to the left-right width of the side cover has a center in the left-right direction of the vehicle body. The fuel tank is arranged so as to substantially coincide with the center in the left-right direction, the fuel tank is extended to the rear of the seat, and a bulging portion projecting upward is provided in this extending portion. A linear injection pipe having an inlet extends obliquely from the outside of the fuel tank above and laterally, and faces the inside of the bulging portion from the upper surface of the bulging portion, and the lower end is the lower edge of the bulging portion, It is installed so that it is positioned near the center in the left-right direction, and the inclination angle of this injection pipe is the oil level when the fuel is filled so as to reach the center line passing through the center of the fuel tank in the left-right direction and the lower edge of the injection pipe. And the injection tube note Since the straight line connecting the mouth lower edge is set to be greater than the banking angle can body is to be directed upward even infusion tube inclined.

For this reason, it is possible to make it difficult for the fuel in the fuel tank to enter the injection pipe even if the vehicle body is tilted, so there is no risk of fuel leaking from the breather hole.

In addition, since the injection pipe is formed in a straight line, it is possible to use a ready-made pipe material without performing post-processing such as bending, and it is possible to keep the manufacturing cost low and
You can visually check the oil level in the fuel tank by looking inside from the inlet.

Further, since the injection pipe extends obliquely with respect to the horizontal direction and the lower end is located at the lower edge of the expansion portion of the fuel tank and the center of the fuel tank in the left-right direction, the injection pipe has a linear shape. However, the total length can be long.
When the total length of the injection pipe is long as described above, in combination with the fact that the oil level can be confirmed as described above, it is possible to reliably prevent the fuel from entering too much during refueling and overflowing from the oil injection pipe.

Furthermore, in order to set the inclination angle of the injection pipe to an angle at which the fuel does not leak even if the vehicle body is inclined, if the injection pipe can be formed long as described above, it can be brought closer to horizontal as compared with the case where the injection pipe is short. For example, when a short injection pipe is used, the oil level is relatively high when the fuel is filled up to the bottom edge of the injection pipe, that is, when the tank is full. If the straight line connecting the intersection point of and the lower edge of the inlet is set to be inclined more than the banking angle, the inlet pipe stands up under the condition that the position of the inlet is not changed.

Therefore, by forming a long injection pipe as in the present invention, it can be laid down more and the injection port can be opened toward the side of the vehicle body. The refueling work inserted from the side of the vehicle body becomes easy.

In addition, since the inside of the bulging portion of the fuel tank was used to lengthen the injection pipe, the space for the injection pipe outside the fuel tank may be smaller than when the injection pipe is projected to the outside of the fuel tank. There is no. Moreover, since the lower end of the injection tube was positioned at the lower edge of the expansion part,
The entire inside of the expansion section can be used as a fuel expansion space.

In addition, a side cover is extended above the inlet and an opening is provided at a portion corresponding to the inlet, and a front portion of the opening is pivotally supported by the side cover and the lid body can be opened and closed in the left-right direction. And the locking device for the lid is arranged side by side with the injection pipe, the lid can be opened to expose the injection port of the injection pipe to the outside of the vehicle body.

For this reason, it is not necessary to open the seat because the lid can be opened to refuel. In addition, even if the user forgets to close the lid after refueling, the lid will be naturally closed by the traveling wind or something that hits it from the front.

Furthermore, since the locking device for the lid is arranged side by side with the injection pipe, the locking device can be arranged using the space next to the injection pipe, so that the fuel tank can be formed large while avoiding interference with the locking device.

[Brief description of drawings]

FIG. 1 is a side view showing a scooter provided with a fuel supply system for a scooter type vehicle according to the present invention, FIG. 2 is a perspective view showing the same main portion, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. 1, and FIG. 5 is a sectional view showing a part of FIG. 3 in an enlarged manner. 3 ... Sheet, 10 ... Fuel tank, 10a ... Swelling part, 12
…… Injection tube, 12a …… Injection port, 20 …… Side cover, 22
…… Aperture, 24 …… Lid, θb …… Banking angle.

Claims (1)

(57) [Claims] 1. A fuel tank formed in a side cover below a seat with a lateral width substantially equal to the lateral width of the side cover is disposed such that the lateral center of the fuel tank substantially coincides with the lateral center of the vehicle body. , The fuel tank is extended to the rear of the seat, and a bulging portion projecting upward is provided in the extending portion, and a linear injection pipe having an inlet at the upper end is provided at the bulging portion of the fuel tank. It is provided so as to extend obliquely from above and to the outside from the outside so as to face the inside of the bulging portion from the upper surface of the bulging portion and the lower end is located at the lower edge of the bulging portion and near the center of the fuel tank in the left-right direction. The inclination angle of the injection pipe is defined by the intersection of the center line passing through the center of the fuel tank in the left-right direction and the oil level when the fuel is filled to reach the lower edge of the injection pipe and the lower edge of the injection port. The straight line connecting is larger than the banking angle The side cover is extended above the inlet, and an opening is provided at a portion corresponding to the inlet, and the front portion of the opening is pivotally supported by the side cover and can be opened and closed in the left-right direction. A fuel refueling device for a scooter type vehicle, wherein a body is provided and the lid locking device is arranged side by side with the injection pipe.