JPS643751Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to the arrangement structure of resin fuel pipes for motorcycles.

Prior Art Fuel pipes for motorcycles require flexibility, so resin tubes are used.

Problems to be Solved However, resin materials have had the disadvantage of being inferior to other materials in terms of heat resistance and weather resistance.

Therefore, it was necessary to place the fuel pipe in a detour and at a certain distance from the engine so that it did not come into contact with the engine and was not affected by the radiant heat from the engine. Furthermore, since the fuel pipe must be reliably installed, it is necessary to protect it using a protective tube.

Means and Effects for Solving the Problems The present invention relates to an improvement in the arrangement structure of resin fuel pipes that overcomes such difficulties, and includes a fuel tank and a fuel tank above the engine whose cylinders are directed forward. In a motorcycle that is provided with a carburetor at the rear, and a resin fuel pipe that supplies fuel from the fuel tank to the carburetor runs between the engine and the fuel tank, the motorcycle is located in front of the carburetor and between the fuel tank and the engine. The present invention is characterized in that an air cleaner is interposed close to the lower surface of the tank, and the resin fuel pipe is disposed on the upper surface of the air cleaner.

In the present invention, a fuel tank is provided above the engine whose cylinders face forward, and a carburetor is provided behind the tank, and a resin fuel pipe that supplies fuel from the fuel tank to the carburetor runs between the engine and the fuel tank. In a passing motorcycle, an air cleaner is located in front of the carburetor and interposed between the fuel tank and the engine, close to the bottom surface of the tank, and the resin fuel pipe is placed on the top surface of the air cleaner, so that the engine Heat generated from the cylinder can be blocked by the air cleaner to prevent it from being transmitted to the fuel pipe, and the durability of the fuel pipe can be improved.

Further, in the present invention, the fuel tank and the carburetor can be connected through the resin fuel pipe in the shortest possible distance without detouring the fuel tank far, so there is no loss of friction in the fuel flowing in the fuel pipe. With this reduction, fuel can be smoothly supplied from the fuel tank to the carburetor.

Further, in the present invention, since the resin fuel pipe is arranged on the upper surface of the air cleaner, the fuel pipe can be reliably supported without requiring special fuel pipe support means.

Embodiment An embodiment of the present invention illustrated in FIGS. 1 to 3 will be described below.

Reference numeral 1 denotes a frame body of a motorcycle, and the frame body 1 has a main tube 3 whose front end is fixed to a head pipe 2, and a connecting member 4 between the main tube 3 and the head pipe 2, which branches left and right and extends downward. A down tube 5, a center pillar 6 connecting the down tube 5 and the rear end of the main tube 3, a seat rail 7 extending toward the rear of the vehicle from near the rear end of the main tube 3, and a seat rail 7. It is composed of supporting backstays 8, etc.

The main tube 3 utilizes an internal space to serve as an oil tank, and an oil tank inlet 9 is provided near the front end of the main tube 3 and directed upward.
are fixed together.

The engine 10 includes the frame body 1
The inlet pipe 12 is installed vertically from the upper part of the crankcase 11 of the engine 10 as shown in FIG. 1, and the inlet pipe 12 is connected to the outlet 13o of the carburetor 13. has been done.

Further, an air cleaner 14 is arranged at the front of the vehicle body adjacent to the carburetor 13, and the air cleaner 14 and the inlet 1 of the carburetor 13 are connected to each other.
3i is connected.

Further, a fuel tank 15 is attached to the main tube 3 located above the air cleaner 14, and the front part of the fuel tank 15 is fixed to the oil tank inlet 9.
This is done by fixing the rear part to a hook 17 attached to the frame body 1 using a fixing band 16.

Thus, the fuel tank 18 is watertightly fastened to the outlet at the bottom of the fuel tank 15, and the fuel tube 1 connected to the fuel tank 18 is
9 is supported on the upper surface of the air cleaner 14, is piped toward the rear of the vehicle body, and is further connected to the carburetor 13 from the rear by passing through the side of the carburetor 13.

Therefore, fuel is supplied from the fuel tank 15 to the carburetor 13 by the fuel tube 19 via the fuel tank 18, and on the other hand, air that has passed through the air cleaner 14 and is purified is supplied to the carburetor 13 and mixed with the above-mentioned fuel. The engine 1 is connected to the inlet pipe 12.
0.

Since the embodiment shown in FIGS. 1 to 3 is constructed as described above, the fuel tube 19 connected to the fuel tank 18 at the bottom of the fuel tank 15 is supported on the upper surface of the air cleaner 14 and is mounted at the rear of the vehicle body. The piping is directed towards the

Therefore, the air cleaner 14 is interposed between the fuel tube 19 and the engine 10, and the heat generated by the engine 10 is completely blocked by the air cleaner 14 and is not transmitted to the fuel tube 19. The durability of the fuel tube 19 is improved.

In addition, in this embodiment, the fuel tube 1
9 is firmly supported on the upper surface of the air cleaner 14, there is no need to provide a special locking member for the fuel tube 19, which makes it possible to reduce the number of parts and improve the efficiency of piping work. can.

Furthermore, in this embodiment, when piping the fuel tube 19, there is no need to route the piping around the engine 10 in order to avoid contact with the engine 10 and avoid the influence of radiant heat, and the piping can be routed to the shortest distance. .

Therefore, the fuel tube 19 can be saved, and the pressure drop due to friction loss between the fluid and the pipe, which is proportional to the length of the pipe, can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view illustrating an embodiment of the arrangement structure of a resin fuel pipe for a motorcycle according to the present invention;
FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged perspective view of the main part thereof. 1... Frame body, 2... Head pipe,
3... Main tube, 4... Connecting member, 5...
Down tube, 6... Center pillar, 7...
Seat rail, 8... Back stay, 9... Oil tank inlet, 10... Engine, 11... Crank case, 12... Inlet pipe, 13
... Carburetor, 14 ... Air cleaner, 1
5... Fuel tank, 16... Fixed band, 1
7...Futsuku, 18...Fuerkotsuk, 19...
…Fuel Chuub.

Claims (1)

[Scope of utility model registration request] A motorcycle comprising a fuel tank above an engine whose cylinders face forward and a carburetor behind the tank, and a resin fuel pipe that supplies fuel from the fuel tank to the carburetor passing between the engine and the fuel tank. , an air cleaner located in front of the carburetor and interposed between the fuel tank and the engine close to the bottom surface of the tank, and the resin fuel pipe disposed on the top surface of the air cleaner. Arrangement structure of resin fuel pipes.