JPH0133393B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a canister mounting device for a motorcycle that has an improved mounting structure for a canister that collects evaporated fuel.

[Technical background of the invention and its problems]

Evaporative fuel that evaporates from the fuel tank while the motorcycle is stopped is collected in a canister so that it does not diffuse into the atmosphere. When the engine starts, the collected evaporated fuel is drawn into the engine intake system through a purge passage by engine negative pressure and is combusted within the engine cylinder.

By the way, when attaching a canister that collects evaporated fuel to a motorcycle, conventionally, a canister mounting member is welded to the vehicle body frame to form a mounting seat, and a band-shaped canister fitting plate is attached to the mounting seat. The canister is fixed with bolts in pairs, upper and lower, and the canister is held by this canister fixing plate.

However, in the conventional canister mounting structure, an independent canister mounting seat is fixed to the vehicle body frame by welding, and a canister fitting plate is fixed to this mounting seat.
The canister mounting device has a large number of parts, and the canister mounting work is therefore complicated and takes a long time.
On the other hand, the engine, transmission case, and engine intake system parts are concentrated in the space surrounded by the body frame of a motorcycle, so many parts are intricately intertwined. Installing the canister mounting seat independently poses a problem in terms of effective use of space.

[Purpose of the invention]

This invention was made in consideration of the above points, and an object thereof is to provide a canister mounting position for a motorcycle that reduces the number of parts, simplifies the canister mounting structure, and makes effective use of space. do.

[Summary of the invention]

In order to achieve the above-mentioned object, a canister mounting device for a motorcycle according to the present invention includes an engine mounting plate that is attached to a vehicle body frame and has an engine mount portion extending therefrom to form a canister mount portion. A canister fitting plate is fixed to the canister mount portion with a fastener, and the canister which collects evaporated fuel is held by the canister fitting plate.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a body frame of a motorcycle. This body frame 10 includes a tank rail (not shown) on which a fuel tank 12 is mounted around a head pipe 11, and a down tube 13.
Fix the tank rail and down tube 1.
3 are connected by a body tube 14 to form a three-dimensional structure. In the space of the vehicle body frame 10 surrounded by the down tube 13 and the body tube 14, an engine 15, a transmission case 16, and an engine intake system 17 are arranged intensively.
be accommodated. The housed engine 15 is attached to the engine mount portion of an engine mounting plate 18, which is fixed to the down tube 13 or body tube 14 of the vehicle body frame 10 with fasteners 19a such as mounting bolts, using fasteners 19b such as tightening bolts. .

Among these, a canister mount part is formed at the upper part of the engine mounting plate 18 fixed to, for example, the left body tube 14 of the vehicle body frame 10, and a second canister mount part is formed on this canister mount part.
As shown in the figures, the canister fitting plate 20 is fixed independently from the fastener 19b of the engine mount portion with a fastener such as a tightening bolt 21. In this case, the canister fitting plate 20 is elastically supported by a rubber cushion (sponge cushion) 22 and a tightening bolt 21 on the engine mounting plate 18 in the form of a cantilever.

For example, the canister fitting plates 20 cover the side surfaces of a pair of canisters 23 that are arranged side by side from both sides, while the free ends of the pair of canister fitting plates 20 are raised and overlapped. The mating part 24 is a tightening bolt 25,
They are integrally connected using fasteners such as screws. On the other hand, a highly elastic cushioning material 26 such as a rubber plate is interposed between the canisters 23, 23 housed in the canister fitting plate 20 to prevent them from colliding with each other.

Furthermore, in order to prevent the canister 23 from falling off the canister fitting plate 20, the canister 23 is formed with an engaging protrusion (or an engaging recess) on the side surface, and a protrusion (or groove) that engages with the engaging protrusion. ) 27 are formed in the circumferential direction of the canister fitting plate 20.

By the way, the canister 23 is for temporarily collecting evaporated material, and is connected to the fuel tank 12 via a lead-out pipe 28, and is also connected to the engine intake system via an evaporated fuel purge pipe 29.
The vaporized fuel collected by the engine negative pressure caused by starting the engine 15 is drawn into the engine intake system 17, and then guided into the engine cylinder through the intake passage, where it is combusted. Reference numeral 30 indicates an atmosphere opening of the canister 23 that is open to the atmosphere.

Therefore, by fixing the canister fitting plate 20 that holds the canister 23 to the engine mounting plate 18,
There is no need to weld the canister mounting seat to the vehicle body frame, which reduces the number of parts and simplifies the mounting structure. Further, since there is no need to weld the canister mounting seat to the vehicle body frame 10, welding work for forming the mounting seat can be omitted, and the canister mounting work can be simplified.

Next, a modification of this invention is shown in FIG.

The canister mounting device for a motorcycle shown in the modified example includes a canister mounting plate 20.
A is the down tube 13A of the vehicle body frame 10A
Engine mounting plate 1 fixed to
It is fixed at 8A. The canister fitting plate 20A is composed of a single plate, and is designed to cover the surroundings of the canisters 23 arranged in parallel.
This is fundamentally different from the split type canister fitting plate 20 shown in FIGS. 2 to 4.

Other configurations are the same as those of the canister mounting device shown in FIGS. 2 to 4, so the same members are given the same reference numerals and their explanations will be omitted.

In one embodiment, a case has been described in which the canisters are arranged in parallel, but the structure does not necessarily have to be arranged in parallel, and a plurality of canisters may be arranged in series. Further, only one canister may be used.

〔Effect of the invention〕

As described above, in the motorcycle canister mounting device according to the present invention, the existing engine mounting plate attached to the vehicle body frame is actively utilized, and the engine mounting plate having the engine mount portion is extended. to form a canister mount part, fix the canister fitting plate to this canister fitting part, hold the canister with this canister fitting plate, and then install the canister. Therefore, there is no need to form an independent canister mounting seat on the vehicle body frame by welding. Therefore,
The number of parts is reduced accordingly, the canister mounting structure can be simplified, and space can be used effectively. Moreover, the canister mounting area is a complex space where the engine and various parts of the engine intake system are concentrated, so welding work to secure the mounting seat in this space is no longer necessary, making the canister mounting work easier. It is easy to assemble, improves work efficiency, and can be assembled in a short time.

In addition, since the engine mounting plate is extended to form the canister mount part, the canister can be installed independently of the engine installation, and even after the engine is installed on the engine mounting plate, the canister can be installed independently. It can be easily attached and detached, improving the degree of freedom of attachment.

[Brief explanation of drawings]

FIG. 1 is an overall view of a motorcycle showing an example of a canister mounting device for a motorcycle according to the present invention, FIG. 2 is a side view showing a canister mounting device for a motorcycle according to the present invention, and FIG. Figure 4 is a plan view taken along the - line in Figure 2;
FIG. 5 is a diagram showing a modification of the canister mounting device for a motorcycle according to the present invention. 10...Vehicle frame, 12...Fuel tank,
13, 13A... Down tube, 14... Body tube, 15... Engine, 17... Engine intake system, 18... Engine mounting plate, 20, 20A... Canister fitting plate, 22... Rubber cushion, 23...
Canista.

Claims (1)

[Claims] 1. An engine mounting plate that is attached to the vehicle body frame and has an engine mount part is extended to form a canister mount part, and the canister fitting plate is fixed to this canister mount part with a fastener. A canister mounting device for a motorcycle, characterized in that a canister that collects evaporated fuel is held by a Nista fitting plate.