JPH06305469A - Canister fitting structure for motorcycle - Google Patents

Abstract

PURPOSE:To avoid the damage of a canister protruding to the side part of a body by providing a canister frame having projecting parts projecting outside from the center of a body frame, and holding the canister inside the projecting parts. CONSTITUTION:A canister 13 is held inside the projecting parts 24 of a canister frame 16. In the case of a motorcycle being turned over, the leg of a rider colliding, or the like, the canister 13 is guarded by the projecting parts 24 so as to prevent impact from the outside from being directly applied to the canister 13. Accordingly, in the case of the canister being disposed at the side part of a body in the form of avoiding auxiliary machinery such as a carburetor and an air cleaner, the damage of the canister protruding to the side part of the body can be surely avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a canister mounting structure for a motorcycle.

[0002]

2. Description of the Related Art A motorcycle is equipped with a canister for supplementing volatile fuel gas in a fuel tank without leaking it to the outside. This canister is one in which activated carbon is sealed in a closed container, and three pipes, that is, a volatile fuel gas lead-out pipe, a purge pipe and a drain pipe are extended from the closed container, and the volatile fuel gas lead-out pipe is It is connected so as to communicate with the liquid surface of the fuel in the fuel tank, the purge pipe is connected to the intake passage of the engine, and the drain pipe is open to the atmosphere.

Volatile fuel gas generated in the fuel tank when the motorcycle is parked is adsorbed by the activated carbon in the canister through the volatile fuel gas outlet pipe and accumulated in the canister. Then, when the engine of the motorcycle is operated, the negative pressure generated in the intake passage is transmitted to the canister by the purge pipe, the volatile fuel gas accumulated in the canister is sucked into the intake passage, and is sent to the engine to be sent to the engine mixture. Is burned with.

In order to effectively utilize such a canister, it is desirable to install the canister in the vicinity of the engine and shorten the length of the volatile fuel gas lead-out pipe and the purge pipe.

[0005]

However, auxiliaries such as a carburetor and an air cleaner are densely arranged in the vicinity of the engine of the motorcycle, and the space for installing the canister is very limited. Therefore, in order to dispose the canister in the vicinity of the engine, it is necessary to dispose the canister laterally of the above-mentioned accessories, which causes the canister to slightly project laterally of the vehicle body. Therefore, there is a risk that the motorcycle may fall over or the occupant's feet may hit and the canister may be damaged.

The present invention has been made in order to solve the above problems, and when the canister is arranged on the side of the vehicle body so as to avoid the auxiliary machinery of the engine, the canister protruding to the side of the vehicle body is damaged. An object of the present invention is to provide a canister mounting structure for a motorcycle capable of avoiding the above.

Another object of the present invention is to provide a canister mounting structure for a motorcycle, in which the canister can be easily attached and detached and which can be constructed to be lightweight.

[0008]

In order to achieve the above object, a canister mounting structure for a motorcycle according to the present invention comprises:
It is characterized in that a canister frame having a bulged portion that bulges outward from the center side of the vehicle body frame is provided, and the canister is held inside the bulged portion.

Further, the canister frame is detachably attached to the vehicle body frame, and the canister frame is made of a pipe material.

[0010]

According to the canister mounting structure for a motorcycle having the above structure, the canister is held inside the bulged portion of the canister frame, so that the motorcycle may fall or
Even if an occupant's foot hits, such an external impact is not directly applied to the canister. Therefore, when the canister is arranged on the side of the vehicle body so as to avoid accessories such as a carburetor and an air cleaner, it is possible to avoid damage to the canister protruding to the side of the vehicle body.

Further, since the canister frame is configured to be attachable to and detachable from the vehicle body frame, the canister can be attached to and detached from the vehicle body frame together with the canister frame, and the canister can be easily attached and detached.

Furthermore, since the canister frame is made of a pipe material, the weight of the canister frame can be reduced while maintaining the rigidity of the canister frame.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a left side view showing an example of a motorcycle to which a canister mounting structure according to the present invention is applied.
This motorcycle 1 has a body frame 2 on the front of its head,
The front fork assembly 4 that supports the front wheels 3
It is pivotally attached to the handlebar 5 so as to be rotatable left and right.
A swing arm 8 supporting a rear wheel 7 is pivotally supported on a pivot shaft 6 provided at a lower center of the vehicle body frame 2 so as to be vertically rotatable, and a rear wheel 7 is provided in front of the vehicle body frame 2.
An engine 9 for driving the engine is mounted, a fuel tank 11 is installed above the engine 9, and a seating seat 12 is installed behind the fuel tank 11. A canister 13 is installed at the rear of the engine 9.

FIG. 2 is a left side view showing an embodiment of the canister mounting structure according to the present invention, and FIG. 3 is a plan view showing the canister mounting structure. A canister frame 16 is detachably fixed to the brackets 14 and 15 provided on the tank tube 2a and the center tube 2b of the vehicle body frame 2 with bolts 17 or the like.

The canister frame 16 has a structure in which both ends of pipes 18 and 19 such as steel pipes are bound by fixing portions 21 and 22, and a canister holder 23 is fixed to the pipes 18 and 19. The parts 21 and 22 are fixed to the brackets 14 and 15 of the vehicle body frame 2.

The middle portions of the pipe members 18 and 19 are curved and have a substantially U shape in a side view (FIG. 2) and a substantially S shape in a plan view (FIG. 3). A bulging portion 24 bulging outward from the side is formed. Then, the canister holder 23 is fixed to the inside of the bulging portion 24 (on the center side of the vehicle body) by welding or the like.

The canister holder 23 has a substantially U-shaped planar shape and has hooks 25 and 26 formed on both side surfaces thereof. The canister 13 is clamped by the canister holder 23 and the hooks 25 and 26 are provided. By locking the rubber band 27 between them, the canister 13 is fixed to the canister frame 16. Cushion members 28 and 29 are attached to the inner surface of the canister holder 23 so that the shock can be absorbed.

By holding the canister 13 in the bulging portion 24 of the canister frame 16 as described above, the canister 13 is provided in a manner avoiding auxiliary equipment such as a carburetor and an air cleaner (not shown) located behind the engine 9. It can be placed on the side of the vehicle.

The canister 13 is a hermetically sealed container 31 made of synthetic resin or the like in which activated carbon is enclosed. An upper part of the hermetically sealed container 31 is provided with an inlet union 32 and an outlet union 33 which communicate with the inside. A drain union 34 is provided below the canister 13.

The other end of the volatile fuel gas lead-out pipe 35 connected to the inlet union 32 is connected so as to communicate with the fuel liquid level in the fuel tank 11, and the purge pipe connected to the outlet union 33. 36
The other end of is connected to an intake passage of a carburetor (not shown, which is located on the right side of the canister 13 in FIG. 3),
Drain pipe 37 connected to the drain union 34
The other end of is extended upward and released into the atmosphere. A rollover valve 38 that prevents the fuel from flowing out when the motorcycle 1 falls is connected to an intermediate portion of the volatile fuel gas outlet pipe 35.

The volatile fuel gas generated in the fuel tank 11 when the motorcycle 1 is parked is volatile fuel gas discharge pipe 3
It is adsorbed by the activated carbon in the canister 13 via 5 and accumulated in the canister 13. When the engine 9 of the motorcycle 1 operates, the negative pressure generated in the intake passage is transmitted to the canister 13 by the purge pipe 36, and the volatile fuel gas accumulated in the canister 13 is sucked into the intake passage of the carburetor. , Is sent to the engine 9 and burned together with the air-fuel mixture. Therefore, the volatile fuel gas is prevented from leaking to the outside.

According to the canister mounting structure configured as described above, the canister 13 is held inside the bulging portion 24 of the canister frame 16, so that the motorcycle 1 may fall or the occupant's foot may hit. In this case, the bulging portion 24 protects the canister 13 so that an external impact is not directly applied to the canister 13. Therefore, when the canister 13 is arranged laterally of the vehicle body while avoiding accessories such as a carburetor and an air cleaner, damage to the canister 13 protruding laterally of the vehicle body can be reliably avoided.

Further, since the canister frame 16 is constructed so as to be attachable to and detachable from the vehicle body frame 2, the canister 13 together with the canister frame 16 can be attached to the vehicle body frame 2.
The canister 13 can be easily attached and detached, and the detachability of the canister 13 is improved.

Further, the canister frame 16 is a pipe material 1.
Because it is composed of 8 and 19, canister frame 1
It is possible to reduce the weight while maintaining the rigidity of No. 6.

[0026]

As described above, the canister mounting structure for a motorcycle according to the present invention is provided with a canister frame having a bulging portion that bulges outward from the center side of the vehicle body frame. It is characterized by holding a canister inside.

In such a structure, the canister is held inside the bulging portion of the canister frame, so that even if the motorcycle falls or the foot of the occupant hits the outside, the outside of the canister can be prevented. No impact is applied directly to the canister. Therefore, when the canister is arranged on the side of the vehicle body so as to avoid accessories such as a carburetor and an air cleaner, it is possible to reliably avoid damage to the canister protruding to the side of the vehicle body.

Further, the canister mounting structure for a motorcycle according to the present invention is characterized in that the canister frame is detachably attached to the vehicle body frame, and the canister frame is made of a pipe material.

For this reason, the canister can be attached to and detached from the vehicle body frame together with the canister frame, and the canister can be easily attached and detached. Further, since the canister frame is made of a pipe material, the weight of the canister frame can be reduced while maintaining the rigidity of the canister frame.

[Brief description of drawings]

FIG. 1 is a left side view showing an example of a motorcycle to which a canister mounting structure according to the present invention is applied.

FIG. 2 is a left side view showing an embodiment of a canister mounting structure according to the present invention.

FIG. 3 is a plan view showing an embodiment of a canister mounting structure.

[Explanation of symbols]

 1 Motorcycle 2 Body Frame 13 Canister 16 Canister Frame 18, 19 Tubing 23 Canister Holder 24 Swelling Part 27 Rubber Band 35 Volatile Fuel Gas Derivation Pipe 36 Purge Pipe 37 Drain Pipe

Claims (2)

[Claims] 1. A canister mounting structure for a motorcycle, comprising: a canister frame having a bulged portion that bulges outward from the center side of a body frame, and the canister is held inside the bulged portion. . 2. The canister mounting structure according to claim 1, wherein the canister frame is configured to be attachable to and detachable from the vehicle body frame, and the canister frame is made of a pipe material.