JP2696325B2 - Fuel supply devices for motorcycles, etc. - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fuel supply device for a motorcycle or the like provided with a plurality of fuel tanks. [Prior art] For example, in a motorcycle such as a long-distance rally which runs on a route where refueling facilities are very limited, a plurality of fuel tanks independent of each other are provided, and Each time the tank is emptied, fuel is taken out while switching sequentially, and the emptied fuel tank is appropriately refilled at a fuel supply facility on the way. Generally, when a plurality of fuel tanks are provided as described above, in order to guide the fuel in the fuel tank to the carburetor, Japanese Patent Application Laid-Open No.
As described in Publication No. 66, etc., two fuel hoses extending from each fuel tank were assembled into one by a T-shaped joint, and such connection was repeated in a tournament style, and finally only one hose was formed. The fuel hose was connected to a carburetor via a fuel pump. However, according to the configuration of the conventional apparatus described above, the connection is repeated using the T-shaped joint, so that the layout of the fuel hose is inevitably complicated, and furthermore, each T-shaped joint receives a large flow resistance, which is superimposed. Therefore, the power consumption of the fuel pump had to be increased. [Object of the Invention] An object of the present invention is to reduce the flow resistance from each fuel tank to the fuel pump and to simplify the layout of the fuel hose in a motorcycle or the like having a plurality of fuel tanks as described above. To provide a fuel supply device that can [Configuration of the Invention] In order to achieve the above object, a fuel supply device of the present invention comprises:
In addition to providing two fuel tanks on the left and right above the engine mounted on the front part of the vehicle body, two fuel tanks are provided independently on both left and right sides of the seat located behind this,
In a motorcycle or the like having a fuel hose connected to a carburetor via a fuel pump from the fuel tank, one fuel filter is disposed at a position substantially below the center of the vehicle body behind the engine and below the bottom of each fuel tank. A filter is formed by concentrically installing a bottomed cylindrical filter member inside the upper part of a filter case having an annular cross section, and the same number of fuel inlet pipes as the number of fuel tanks at an upper and lower intermediate position around the filter case. Are radially provided, and a fuel outlet pipe is attached to the upper end opening of the filter member so as to face upward, each fuel tank and the fuel inlet pipe are individually connected via a fuel hose, and the fuel outlet pipe is connected to the fuel outlet pipe. It is characterized in that the hose is connected to a carburetor via a fuel pump. Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 shows a motorcycle provided with a fuel supply device according to an embodiment of the present invention, wherein 1 is an engine mounted on the front side of the vehicle body, 2 is a carburetor for generating a mixture of the engine 1 and 3 is Seats 4, 5 are front and rear wheels. The left and right portions of the front part of the seat 3 at the left and right positions above the engine 1
In the state shown in the figure, two fuel tanks 6L and 6R are provided, and two fuel tanks 7L and 7R are further provided on the left and right sides of the seat 3 on the rear side, so that a total of four independent fuel tanks are provided. Is provided. Although the latter fuel tanks 7L and 7R have a left-right integrated structure, the internal fuel reservoir is
The space is independent of each other. Above fuel tank 6L, 6
R, 7L, 7R are caps 11L, 11R, 12L, 1 for fuel injection on the upper surface.
With 2R, cock 13L, 13R, 14L, 14R for taking out fuel on the bottom
have. In addition, a common fuel filter 9 and a fuel pump 10 are provided for the plurality of fuel tanks described above, and the fuel filter 9 is provided at each fuel tank 6L, 6R, It is arranged at a position below the bottom of 7L, 7R. As shown in FIGS. 3 and 4, the fuel filter 9 is configured such that a bottomed cylindrical filter member 31 is concentrically provided inside an upper part of a filter case 30 having an annular cross section. A plurality of fuel inlet pipes 15L, 15R, 16L, 16R in the same number as the number of fuel tanks are provided at the upper and lower intermediate positions around the outer filtration case 30, and the inlets of the fuel inlet pipes 15L and 16R are filtered. While opening toward the side surface of the member 31, the inlets of the fuel inlet pipes 15R and 16L open below the filtering member 31 and are stepped from each other. For this reason, the fuel supplied from the fuel inlet pipes 15L and 16R is separated into right and left on the side surface of the filter member 31 as shown in FIG. 4, whereas the fuel supplied from the fuel inlet pipes 15R and 16L is It flows into the straight and the inflow resistance is reduced as a whole. On the other hand, a fuel outlet pipe 17 is attached to the upper end opening of the filter member 31 upward so that the fuel after filtration flows out. A plurality of fuel inlet pipes 15L, 15R,
The 16L, 16R are individually connected directly to the cocks 13L, 13R, 14L, 14R of the fuel tanks 6L, 6R, 7L, 7R via fuel hoses 18,. In such connection, these fuel inlet pipes 15L, 15R, 16L, 16R facilitate the mutual connection as described above, and in order to simplify the layout, the direction in which they project from the filter case 30 is the cock 13L, 13R, 14L,
Radial toward 14R (see Fig. 4). Further, a fuel outlet pipe 17 of the fuel filter 9 is connected to the fuel pump 10 via a fuel hose 19, and the fuel pump
10 is connected to the carburetor 2 via a fuel hose 20. According to the above-described fuel supply device, the fuel filter 9 is provided with four fuel inlet pipes 15L, 15R, 16L, 16R, which are individually provided with cocks 13L, 13R, 14L of the fuel tanks 6L, 6R, 7L, 7R. , 14R, it is possible to significantly reduce the flow resistance of the fuel flow compared to the conventional device in which a T-shaped joint is interposed several times on the way to the fuel filter. it can. Further, since no extra T-shaped joint or the like is interposed, the layout of the fuel hose can be simplified. In a motorcycle in which the fuel tanks 6L, 6R, 7L, 7R are arranged in front and rear, the front fuel tanks 6L, 6R cover the engine 1 from above, so that heat is collected inside and the rear fuel tank The tanks 7L and 7R receive heat from the engine 1 at the time of traveling. In addition, the fuel hose 18 connected to the fuel tank is longer than the one that is disposed at the front part of the vehicle body, so that it receives a large amount of heat. Therefore, the fuel hose 18
The fuel inside evaporates and generates bubbles inside, so that the so-called paper lock, which hinders the flow of the fuel, tends to occur. Therefore, it is necessary that the fuel pipe has a structure in which the generated steam is easily discharged to the fuel tank side or the carburetor side quickly. However, in the present invention, the fuel tanks 6L, 6R, 7L, The fuel filter 9 is disposed at a position lower than the bottom of the 7R, and the same number of fuel inlet pipes 15 as the number of fuel tanks radially provided in the filter case 30 are provided.
L, 15R, 16L, 16R are individually connected to fuel tank 6 by fuel hose 18.
The connection to L, 6R, 7L, 7R makes it possible to shorten the length of the fuel hose 18 to further simplify the layout, and even if bubbles of fuel are generated in the fuel hose 18 by fuel vapor. A fuel outlet pipe 17 is projected upward at the upper end of a filter member 31 provided concentrically inside the filter case 30 so as to easily escape to the fuel tank side. By connecting the fuel pump 10 and the carburetor 2 via the hoses 19 and 20, the air bubbles entering the fuel filter 9 are
Since the gas passes through the filter member 31 by buoyancy and is sucked by the fuel pump 10 to reach the carburetor 2, bubbles generated in the fuel hose 18 can be easily discharged to both the fuel tank side and the carburetor side, No paper lock occurs. Furthermore, since no air bubbles accumulate in the fuel filter 9, there is no decrease in the filtration capacity. Further, since only one fuel filter 9 needs to be provided and this is directly piped, the number of parts is smaller than those provided with a filter for each fuel tank or a fuel supply apparatus which is piped with a T-shaped joint. Can be simplified, and the fuel filter 9 can be easily cleaned. Further, a filter member 31 is provided in an upper inside portion of the filter case 30, and the filter case is provided.
Fuel inlet pipes 15L, 15R, 16L, 16R at upper and lower intermediate positions around 30
Is radially attached to filter the dust in the fuel
Settle under the bottom to facilitate separation. Although the above-described embodiment has been described with respect to a motorcycle, the present invention can be similarly applied to a motorcycle such as a motorcycle and a motorcycle provided with a plurality of fuel tanks. [Effects of the Invention] As described above, the present invention relates to a motorcycle or the like provided with two fuel tanks on the left and right sides of the engine and two fuel tanks on the left and right sides of the seat. Since the same number of fuel inlet pipes as the tanks are provided, and the fuel inlet pipes and the fuel tank are individually connected directly via fuel hoses, respectively, compared to the conventional apparatus using a T-shaped joint that bends in the middle. Therefore, the flow resistance of the fuel can be reduced, and the layout of the fuel hose can be simplified. In addition, one fuel filter is arranged at a position substantially below the bottom of the fuel tank at the center of the vehicle body behind the engine, and the same number of fuel inlet pipes as the fuel tanks provided radially in the filter case are individually connected to the fuel hose by the fuel hose. Because it is connected to the tank, the length of the fuel hose connected to the fuel tank can be shortened to further simplify the layout. The fuel outlet pipe can be easily discharged, and the fuel outlet pipe is attached upward to the upper end opening of the filter member concentrically provided inside the upper part of the filter case, and the fuel outlet pipe is connected to the fuel pump by the fuel hose. Since it was connected to the carburetor, the air bubbles that entered the fuel filter could pass through the filter member by buoyancy and reach the carburetor by suction of the fuel pump. Results bubbles can be easily discharged to both the fuel tank side and the vaporizer side, never paper lock occurs. Further, since no air bubbles accumulate in the fuel filter, there is no possibility that the filtration capacity of the fuel filter is reduced. Also, it is only necessary to provide one fuel filter, and this is directly connected to the fuel tank by a fuel hose. Therefore, the number of parts is smaller than that of a filter provided for each fuel tank or a fuel supply device connected by a T-type joint. Because of this, the device structure can be simplified, the fuel filter can be easily cleaned, and a filter member is installed inside the upper part of the filter case. Since the fuel inlet pipe is radially mounted at the intermediate position, dust in the fuel can sink down to the lower side of the filter case and be easily separated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a motorcycle equipped with a fuel supply device according to an embodiment of the present invention, and FIG. 2 is a plan view of the motorcycle showing only essential parts such as a fuel tank. , FIG. 3 is a longitudinal sectional view of the fuel filter used in the above-mentioned apparatus, and FIG. 4 is IV in FIG.
FIG. 1 ... Engine, 2 ... Vaporizer, 3 ... Seat, 6L, 6R,
7L, 7R: Fuel tank, 9: Fuel filter, 10: Fuel pump, 15L, 15R, 16L, 16R ... Fuel inlet pipe, 17: Fuel outlet pipe, 18, 19, 20 ... Fuel hose , 30 …… Filter case,
31 Filter member.

Claims (1)

(57) [Claims] Two fuel tanks are provided on the left and right sides of the engine mounted on the front side of the vehicle body, and two fuel tanks are independently provided on both left and right sides of the seat located behind the fuel tank. In a motorcycle or the like connected to a carburetor via a pump, one fuel filter is disposed at a position substantially below the engine and below the bottom of each fuel tank at the center of the vehicle body, and the fuel filter has a circular cross section. A cylindrical filter member with a bottom is provided concentrically inside the upper part of the inside of the case, and the same number of fuel inlet pipes as the fuel tank are radially provided at an upper and lower middle position around the filter case, and the filter is provided. A fuel outlet pipe is attached upward to the upper end opening of the member, each fuel tank and the fuel inlet pipe are individually connected via a fuel hose, and the fuel outlet pipe is connected to the fuel hose. A fuel supply device for a motorcycle or the like, wherein the fuel supply device is connected to a carburetor via a fuel pump by a motor.