JP2581544Y2 - Motorcycle fuel supply system - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention is a fuel supply device for a motorcycle in which a storage box is arranged at the upper center of the vehicle body and a fuel tank is arranged below the seat. About.

(Prior Art) In a motorcycle, a storage box for storing a helmet or the like is set to have a relatively large capacity, and is arranged at an upper center portion of a vehicle body to secure a space. When the storage box is placed in the upper center of the vehicle, the fuel tank is often moved under the seat at the rear of the vehicle.

In this case, the fuel tank needs to have a certain tank capacity, and usually has a complicated shape using various spaces. In particular, there is a relatively large space between the rear wheel and the engine unit, and a shape utilizing this portion is essential.

A fuel cock is required for the fuel tank, but it is difficult to install a manual fuel cock in the fuel tank placed inside such a concealed interior, and it is usual to rely on an auto cock. However, there is a problem that the cost is high and the reliability is not enough for the cost.

(Problem to be Solved by the Invention) This invention has been made in consideration of the above-described circumstances, and a manual fuel cock that is easy to operate in a fuel tank covered with a body cover under a seat at a rear portion of a vehicle body cannot be applied. An object of the present invention is to provide a fuel supply device for a motorcycle which can be installed without a motor.

[Structure of device]

(Means for Solving the Problems) In the fuel supply device for a motorcycle according to the present invention, as described in claim 1, a storage box is disposed at the upper center of the vehicle body in order to solve the above-described problems. On the other hand, a fuel tank is arranged below the seat in the rear part of the vehicle body, and both sides are covered with a body cover. The fuel tank has a curved lower bulge at the front part which is deeply penetrated into the space between the engine unit and the rear wheels. A lower portion of the curved lower bulging portion of the fuel tank and a lower edge of the body cover are set to have substantially the same height, and the lower end of the curved lower bulging portion of the fuel tank is set to be substantially the same height. In the part, so that the manual fuel cock overlaps the chain line in the vehicle side view,
The fuel cock is disposed on a side opposite to a chain line that transmits power from the engine unit to a rear wheel, and the fuel cock is laterally exposed immediately below the lower edge inside the body cover,
A fuel pump is provided behind the curved lower bulging portion of the fuel tank and on the side of the vehicle body opposite to the fuel cock arrangement at the rear lower portion of the driver's seat.

(Operation) With this configuration, the fuel cock is provided just below the inside of the lower edge of the body cover and is exposed to the side without obstruction, and can be easily opened and closed by putting a hand. Become.

Also, while the fuel cock is located on the opposite side of the chain line, the fuel pump is located behind the curved lower inflated part of the fuel tank, so the space between the engine unit and the rear wheel that digs deep is the fuel tank space. And the effective tank capacity of the fuel tank can be increased. On the other hand, the fuel pump is arranged on the side of the vehicle body at the lower rear part of the seat, so that the fuel pump does not sacrifice the tank capacity of the fuel tank. In addition, the fuel pump is located at the rear lower part of the driver's seat and on the side of the vehicle body opposite to the fuel cock arrangement, so that the fuel pump does not disturb the driver even if it bulges outward in the vehicle width direction. There is no need to dent the fuel tank.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a body frame structure of a motorcycle provided with the fuel supply device of the present invention, FIG. 2 is a plan view showing a body frame structure of the motorcycle, and FIG. 3 is FIG. FIG. 2 is a side view of the motorcycle of FIG.

A body frame of the motorcycle includes a pair of left and right main tubes 2 that extend from the head pipe 1 in a rearward and downward direction.
A left and right down tube 3 which extends downward from the head pipe 1 side of the main tube 2 and extends rearward, and a pair of left and right center pillars 4 connecting the rear ends of the main tube 2 and the down tube 3 are substantially inverted trapezoidal. Left and right seat rails 5 connected to the rear end of the main tube 2 and extending obliquely upward and rearward, and body tubes 6 connected to the rear end of the main tube 2 and supporting the rear end of the seat rail 5. Is built by

An engine unit 7 is suspended in an inverted trapezoidal body frame at the center. A front wheel 9 which is steered by a handle 8 is pivotally supported on the head pipe 1 via a steering shaft, while a swing arm 10 is pivotally supported by the center pillar 4, and a rear wheel 11 is supported at the rear end of the swing arm 10. Is done. The rear wheel 11 is driven via a chain 14 from a drive sprocket gear 13 fixed to an output shaft 12 of the engine unit 7.

A storage box 15 is arranged from above the main tube 2 to above the front part of the seat rail 5.
A tandem seat 16 also serving as a pillion seat is placed on the seat rail 5 behind the seat 15. Storage box 15
, The fuel tank 17 is installed in a space surrounded by the seat rail 5 and the body tube 6 under the seat 16.

Both sides below the storage box 15 from the front of the engine unit 7 are covered with a cowling 18 and the seat
16 Below the lower edge, both sides of the fuel tank 17 are body covers 19
Covered.

The main tube 2 is connected to a lower part of the head pipe 1, and from a position near the center to the upper part of the head pipe 1,
An upper main tube 2a for reinforcement is bridged. These two tubes 2, 2a once spread to both sides from the head pipe 1, are then guided obliquely downward and rearward, and narrowly converge from the center of the main tube 2 to the tip of the seat rail 5. The convergence is continued up to the four-fourth front part of the seat rail 5 and the front end part of the seat 16, and the convergence gradually expands from there to the center part, and the rear half part extends rearward almost in parallel.

The storage box 15 has a substantially oval contour with a rounded front end and a narrowed rear when viewed from above so as to conform to the shapes of the upper main tube 2a and the seat rail 6. Along the upper main tube 2a, the rear wall is inclined rearward and downward so as to be parallel to the rear main tube 2a, and has a substantially parallelogram.

On the other hand, at the rear of the seat rail 5, seat seat plates 20 and 21 are provided which straddle left and right, and the seat 16 is placed thereon. In this case, the front end portion 16a of the seat 16 is provided such that the seat bottom plate is provided so as to be inclined forward and upward, and is stacked close to the rear wall of the storage box 15.

The seat 16 is fixed by a seat lock installed on the seat seat plate 20, and the seat lock is released by remote control by operating a cylinder lock arranged at a lower edge portion of the body cover 19 or the like.

Since the fuel tank 17 is disposed in the body cover 19 below the seat 16, the fuel tank 17 has a slender front substantially inclined along the seat rail 5 and a forwardly downwardly inclined arrangement structure in which the rear is highly inclined. The rear end of the fuel tank 17 extends below the tail cover 22,
An inlet 24 is arranged on the upper surface. By opening the opening / closing lid 23 provided on the tail cover 22, the injection port 24 allows fuel injection.

As shown in FIG. 4, the fuel tank 17 is formed into half tanks 17a and 17b which are divided into upper and lower parts, and are completed by combining them. The flange 25 is formed on the mating surface and seam welding is performed. Since the front half of the seat rail 5 is narrow and converges, the upper half tank 17a is formed to be tapered and positioned in the seat rail 5, and the flange 25 is made wider by this thinned portion. , Against the lower surface of the seat rail 5.

The width of the front part of the lower tank 17b is not reduced. That is, it is formed in a substantially quadrangular shape in plan view, deeply indents downward with the width thereof, is fitted into the space between the engine unit 7 and the rear wheel 11, and most of the tank capacity is formed by the curved lower bulging portion 17c. Earn. The tank lowest portion is also formed in the curved lower bulging portion 17c. That is, as shown in FIG. 1 and FIG. 4, the fuel tank 17 has a curved lower bulging portion 17c at the front lower portion which has a shape deeply penetrating into the space between the engine unit 7 and the rear wheel 11. .

The relative positions of the lower portion of the curved lower bulging portion 17c of the fuel tank 17 and the lower edge of the body cover 19 are set so as to be substantially the same height.

The curved lower bulging portion 17c of the fuel tank 17 which is the lowest portion
A manual fuel cock 26 is attached to the lower bottom of the front end on the right side as viewed from the rider on the seat 16. The chain 14
Is located on the opposite left side. In special cases, if the chain line is on the right,
26 is installed on the left side.

Between the seat rail 5 and the body tube 6,
A triangular space that is flat on both the left and right sides is formed. On the other hand,
In the space on the left side of the rider straddling the seat 16, a fuel pump 27 is installed in a vertically laid state. Fuel pump 27
Is disposed behind the curved lower bulging portion 17c of the fuel tank 17 and on the side of the vehicle body opposite to the position of the fuel cock 26 at the lower rear portion of the driver's seat. Fixed band wrapped around fuel pump 27
Both ends of 28 are fastened to the body tube 6 with bolts 29 and attached. The outside is covered with the body tube 19.

The inlet of the fuel pump 27 is connected to the fuel pump
The outlet is connected to a carburetor 32 above the engine unit 7 by an outlet pipe 31.

In this way, the fuel cock 26 is provided immediately below the inner edge of the lower edge of the body cover 19 and is exposed to the side without any obstruction, and can be easily opened and closed by inserting a hand (third embodiment).
(See FIG.), It becomes possible to install a manual fuel cock 26 with good operability and without danger in the fuel tank 17 hidden inside.

[Effect of the invention]

As described above, in the motorcycle fuel supply device according to the present invention, the storage box is disposed at the upper center of the vehicle body, while the fuel tank is disposed below the seat at the rear of the vehicle body.
In a motorcycle having a curved lower bulge formed on both sides thereof with a body cover and having a curved lower bulge formed in a front portion so as to protrude deep into a space between an engine unit and a rear wheel, a curved lower portion of the fuel tank is provided. The lower end of the bulging portion and the lower edge of the body cover are set to be substantially the same height, and a manual fuel cock and a chain light in the side view of the vehicle are provided at the lowest portion of the curved lower bulging portion of the fuel tank. The fuel cock is disposed on the opposite side to the chain line that transmits power from the engine unit to the rear wheels so as to overlap, and the fuel cock is exposed to the side immediately below the inside of the lower edge of the body cover, while the fuel cock is The fuel pump is located behind the curved lower bulge and on the side of the vehicle opposite to the fuel cock arrangement in the lower rear of the driver's seat. An easy-to-operate manual fuel cock can be easily installed in the fuel tank covered by the bar, while the fuel cock is installed on the opposite side of the chain line, just below the inside of the lower edge of the body cover. The accessibility and operability of the fuel cock are improved, and the operation of opening and closing the fuel cock can be easily performed.

Also, since the fuel cock is installed on the opposite side of the chain line and is not installed on the chain line side, there is no need to install the fuel cock considerably upward in anticipation of the vertical movement of the chain line. The fuel tank can be installed at a lower position so as to overlap with the line, and the tank bottom of the fuel tank can be shifted downward by that amount, so that the tank effective capacity can be increased.

Furthermore, since the fuel pump is disposed behind the curved lower bulging portion of the fuel tank and on the side of the vehicle below the driver's seat, the fuel pump can be disposed without sacrificing the tank capacity of the fuel tank. In addition, the fuel pump is located at the rear lower part of the driver's seat, so that it does not obstruct driving even if it bulges outward in the vehicle width direction, there is no need to dent the fuel tank, and the fuel tank is located behind the engine unit. The capacity between tanks can be increased by effectively utilizing the space between the wheels.

[Brief description of the drawings]

FIG. 1 is a side view showing a frame structure of a motorcycle provided with a fuel supply device according to an embodiment of the present invention, and FIG.
FIG. 3 is a side view of the motorcycle shown in FIG. 1, and FIG. 4 is an enlarged side view of the fuel tank shown in FIG. 1 ... head pipe, 2 ... main tube, 2a ... upper main tube, 5 ... seat rail, 7 ... engine unit, 11 ... rear wheel, 14 ... chain, 15 ...
Storage box, 16 ... Seat, 17 ... Fuel tank, 17c
…… the curved lower bulge, 18 …… Cowling, 19 …… Body cover, 26 …… Fuel cock, 27 …… Fuel pump, 30 ……
Inlet pipe, 31 ... Outgoing pipe, 32 ... Carburetor.

Claims (1)

(57) [Scope of request for utility model registration] 1. A storage box is disposed at the upper center of a vehicle body, a fuel tank is disposed below a seat at a rear part of the vehicle body, and both sides are covered with a body cover. The fuel tank has an engine unit and a rear wheel at a front part. In a motorcycle having a curved lower bulging portion having a shape deeply penetrating into a space between the lower portion and the lower edge of the body cover, the lowermost portion of the curved lower bulging portion of the fuel tank and the lower edge of the body cover are substantially the same height. At the lowest part of the curved lower bulge of the fuel tank, opposite to the chain line that transmits power from the engine unit to the rear wheels, so that the manual fuel cock overlaps with the chain light in vehicle side view And the fuel cock is exposed to the side just below the inside of the lower edge of the body cover, while being behind the curved lower bulge of the fuel tank and the driver Over preparative rear lower portion of the fuel cock disposed opposite the fuel supply device of a motorcycle, characterized in that arranged fuel pump to the vehicle body side of the.