JPS6220073B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fuel tank for small vehicles such as motorcycles and tricycles, and particularly to the arrangement structure of the fuel tank.

Prior art and its problems A fuel pipe is connected to the bottom plate of a fuel tank in a conventionally used small vehicle such as a motorcycle through a fuel pot, and the fuel in the fuel tank is released as the fuel pot is opened and closed. It is configured to be supplied to the carburetor side or to be cut off. This fuel tank is normally kept closed while the vehicle is parked.

On the other hand, when driving long distances, there is a demand to reduce the number of refueling operations, and in order to increase the fuel tank capacity, an auxiliary fuel tank has been installed in addition to the normally installed tank (hereinafter referred to as the main fuel tank). There is a model vehicle. If this auxiliary fuel tank is placed below the main fuel tank or below the saddle-shaped seat connected to the rear of the main fuel tank, the location of the fuel tank becomes a problem, and it is difficult to operate and see it in a narrow space at the back of the engine. It requires some ingenuity to arrange the fuel tank while taking into consideration its performance and avoiding interference with other parts.

Means for Solving Problems An object of the present invention is to ensure operability and visibility of a fuel tank in a small vehicle having an auxiliary fuel tank in addition to a main fuel tank, and to prevent interference between the fuel tank and other components. The point is to avoid.

The purpose of this was to have a main fuel tank and a saddle-shaped seat connected back and forth at the top of the vehicle body, and a sub-fuel tank below the seat that communicates with the main fuel tank, with the outer surface of the sub-fuel tank facing the side. In a small vehicle with a structure covered by a vehicle body cover, a fuel tank is provided on the outer surface of the auxiliary fuel tank, and a fuel intake pipe installed inside the auxiliary fuel tank and a fuel pipe that supplies fuel from the auxiliary fuel tank to the engine side. This is accomplished by connecting the fuel tank and the fuel tank via a fuel tank, which faces an opening formed in the side body cover.

Embodiment Hereinafter, an embodiment of the present invention shown in FIGS. 1 to 7 will be described.

The motorcycle 1 is equipped with a main fuel tank 2 and a saddle-shaped seat S connected in the front and back on the upper part of the vehicle body.
An auxiliary fuel tank 3 is disposed below the rear of the main fuel tank 2 or below the openable and closable saddle-shaped seat S (see FIGS. 1 and 2). A fuel pot 5 is attached to the left surface of the vehicle body of the auxiliary fuel tank 3, and the operator 6 of the fuel pot 5 is connected to the auxiliary fuel tank 3.
It faces the opening 4a in the side body cover 4 that covers the side body cover 4, and is attached so as to be substantially flush with the side body cover 4 (see FIGS. 2 and 3).

In addition, a concave retreated portion 2A is formed at the rear center of the main fuel tank 2, and a main fuel tank cock 22 (described later) is disposed in the same portion, and a connection (described later) led out from the main fuel tank 2 via a sealing material 12. tube 20,
And the breather pipe 21 is connected to the main fuel tank tank 22.
It is guided downward through an opening 2B defined by the tank lower wall 2a and the tank fixing bracket 2b. The connecting pipe 20 connects the main fuel tank 2
The breather pipe 2 is connected to the auxiliary fuel tank 3 so that the fuel in the auxiliary fuel tank 3 is fed into the auxiliary fuel tank 3.
1 is piped across both tanks so as to communicate the upper space in the main fuel tank 2 and the upper space in the auxiliary fuel tank 3 (see FIGS. 2 to 4).

The fuel pot 5 is arranged and fixed within a recess formed in the main body of the auxiliary fuel tank 3. This concave portion is formed by integrally joining the cylindrical holder 7 having the Kotoku base 8 to an opening formed in the outer wall of the auxiliary fuel tank (the third
(see figure).

Therefore, on the outer surface of the tank of the Kotoku base 8, there is a Kotoku body 10 together with a cylindrical Kotoku ring 9 having a fixing piece 9a on the base end side and a dial flange 9b on the other end side. Fixed with screws. In addition, the inner surfaces of the Kotoku ring 9 and the cylindrical holder 7 are sealed to prevent water from accumulating.
It has a shape that tapers outward.

In addition, a curved groove 11 is provided in the Kotoku body 10.
A valve body 11 having a diameter of 1.a is fitted so as to be slidable and rotatable, and the valve body 11 is rotatably operated by an operator 6 integrated with a disc 6a having a diameter slightly smaller than the inner diameter of the Kotoku ring 9. I'm starting to get it.

The Kotoku base 8 has openings 8a, 8b, 8c.
is formed, and a groove 8d that partially matches the opening 8c is formed on the surface facing the valve body 11. The relationship between the openings 8a, 8b, 8c and the groove 8d and the groove 11a in the valve body 11 is such that when the operator 6 is in the ON position, the groove 11a
Openings 8a and 8c are communicated through a and 8d (see Figure 5), and rotated by an angle of 90 degrees from the ON position.
When the operator 6 is in the OFF position, the openings 8a and 8b communicate with each other via the groove 11a (see Fig. 7).
When the operator 6 is at the RES (reserve) position rotated further by 90 degrees, the openings 8b and 8c are communicated through the grooves 11a and 8d (see FIG. 6).

Fuel suction pipes 23 and 24 are connected to the openings 8a and 8b, respectively, and a fuel pipe 25 is connected to the opening 8c.
is connected. The fuel suction pipe 24 is arranged so that its tip suction part 24a is close to the tank bottom plate, whereas the tip suction part 23a of the other fuel suction pipe 23 is located at a predetermined height higher than the suction part 24a. It is located in The fuel pipe 25 is connected to the suction side of the electromagnetic fuel pump P, and the discharge side of the fuel pump P and the carburetor C are further connected by piping.

In the above configuration, when the main fuel tank tank 22 is opened, as shown in FIGS. 1 and 2,
When the operator 6 of the fuel pot 5 is set to the ON position, the openings 8a and 8c are communicated with each other (see Fig. 5). Therefore, when the engine is running, the fuel pump P is connected to the fuel pump P through the fuel suction pipe 23 and the fuel pipe 25. Fuel is then supplied to the carburetor. As fuel is discharged from the auxiliary fuel tank 3, the fuel in the main fuel tank 2 is sequentially
The fuel is supplied to the auxiliary fuel tank 3 through the connecting pipe 20. As the vehicle runs, the fuel in the main fuel tank 2 and the auxiliary fuel tank 3 is consumed, and when the oil level drops to the position of the tip suction part 23a of the fuel suction pipe 23 (this is due to changes in the operating state of the engine). ), and when the operator 6 is rotated 180 degrees and switched to the RES (reserve) position, the openings 8b and 8c are communicated (see Fig. 6), and as a result, the tips of the respective fuel intake pipes 23 and 24 The fuel (reserved portion) corresponding to the difference in height between the suction portions 23a and 24a is subsequently fed to the fuel pipe 25 side. In this state, it is possible to confirm at a glance from the side of the vehicle that the reserve fuel has been consumed depending on the position of the operator 6, which is effective for refueling.

Furthermore, if the fuel pot 5 is set to the OFF position during parking, neither the openings 8a, 8b communicate with the opening 8c, and therefore the fuel in the tank will not be discharged to the fuel pipe 25 side.

Further, when maintaining the auxiliary fuel tank 3 or the fuel tank 5, it is convenient if the main fuel tank 22 is closed, since there is no need to intentionally drain the fuel in the main fuel tank 2.

In addition, the connecting pipe 20 and the main fuel tank tank 2
2 is disposed in the recessed recessed portion 2A of the main fuel tank 2, so that it does not interfere with the seat S.

In this embodiment, since the fuel pot 5 is located below the seat S, the occupant can easily operate it while straddling the seat S. moreover,
The fuel pot 5 is attached to the outer surface of the auxiliary fuel tank 3 and does not interfere with other members, so the operator 6 can be made larger and has good operability. Moreover, since the operator 6 faces the opening 4a of the side vehicle body cover 4 and is disposed so as to be substantially flush with the side vehicle body cover 4, it does not touch the occupant's feet in the riding position.

Effects of the Invention As is clear from the description of the embodiments, in the present invention, a fuel tank is provided on the outer surface of the auxiliary fuel tank, a fuel suction pipe arranged inside the auxiliary fuel tank,
The fuel pipe that supplies fuel from the auxiliary fuel tank to the engine side is connected via the fuel tank, and the fuel tank faces the opening formed in the side body cover, so the fuel tank can be opened while straddling the seat. It is also possible to perform operations, and the operability is good. Furthermore, since the fuel pot is disposed facing the opening formed in the side body cover, visibility is good as the switching state of the operator can be checked at a glance from the side of the body.

Furthermore, the fuel tank disposed on the outer surface of the auxiliary fuel tank does not interfere with other components at the back of the engine, improving the degree of freedom in designing the arrangement of components in the narrow space at the back of the engine.

[Brief explanation of the drawing]

FIG. 1 is a side view of a motorcycle equipped with a fuel tank according to an embodiment of the present invention, FIG. 2 is an explanatory view of the same main part, and FIG. 3 is a cross-sectional view taken along the line - in FIG.
FIG. 4 is a view taken along the line - in FIG. 2, and FIGS. 5 to 7 are explanatory diagrams showing the operating mode of the fuel pot. 1...Motorcycle, 2...Main fuel tank, 2A
...Concave retreat part, 2B...Opening, 2a...Lower wall,
2b...tank fixing bracket, 3...auxiliary fuel tank, 4...side body cover, 4a...opening,
5...Fuel pot, 6...Controller, 6a...Disk, 7...Cylindrical holder, 8...Cotton base,
8a, 8b, 8c...opening, 8d...concave groove, 9...
...Kotuku Ring, 10...Kotuku Body, 1
1... Valve body, 11a... Concave groove, 12... Sealing material,
20... Connecting pipe, 21... Breathing pipe, 22... Main fuel tank tank, 23, 24... Fuel intake pipe,
23, 24a... Tip suction part, 25... Fuel pipe,
C...carburizer, S...saddle seat, P...fuel pump.

Claims (1)

[Scope of Claims] 1. A main fuel tank and a saddle-shaped seat are arranged in the upper part of the vehicle body in series, and there is an auxiliary fuel tank below the seat that communicates with the main fuel tank. In small vehicles whose sides are covered by side body covers, a fuel tank is installed on the outside of the auxiliary fuel tank, and fuel is supplied from the auxiliary fuel tank to the engine side through a fuel intake pipe installed inside the auxiliary fuel tank. A fuel tank for a small vehicle, characterized in that a fuel pipe is connected to the fuel tank via a fuel tank, and the fuel tank faces an opening formed in a side body cover.