JP2006182154A - Fuel pump module, and motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel pump module having excellent maintainability and high mounting degree of versatility. <P>SOLUTION: The fuel pump module 10 consists of a lid body 11, and a casing 12 attachably/detachably mounted on the lid body 11. A fuel pump 13 is stored in the fuel pump module 10, and fuel sucked from a fuel tank is stored in a bottom of the casing 12. A plurality of through parts 14 are formed in the lid body 11, and a fuel flow-in passage 15 to suck fuel from the fuel tank, and a fuel feed passage 16 to feed pressurized fuel pressurized by the fuel pump 13 to an internal combustion engine are respectively fixed and arranged to each through part 14. The fuel feed passage 16 is connected to the fuel pump 13, and the fuel pump 13 is supported by the lid body 11 via the fuel feed passage 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel pump module and a motorcycle equipped with the fuel pump module.

  In a gasoline fuel injection engine, a fuel pump is generally used to supply pressurized fuel to a fuel injection valve. If this fuel pump can be stored in the fuel tank, it can save space and is convenient for a motorcycle with limited storage space. However, in the case of a motorcycle having a small fuel tank capacity, it is difficult to store the fuel pump in the fuel tank. In this case, the fuel pump is installed outside the fuel tank.

  FIG. 5 is a view showing the fuel case disclosed in Patent Document 1 and its arrangement. For simplicity of explanation, a part of the drawing is omitted and the reference numerals are reassigned.

  As shown in FIG. 5, a fuel case 101 containing a fuel pump (not shown) is installed below the fuel tank 102, and fuel is supplied from the fuel tank 102 through a fuel inflow passage 103 opened on the side surface of the fuel case 101. Is supplied into the fuel case 101. The fuel boosted by the fuel pump is supplied to the fuel injection valve 106 through the fuel supply passage 104 and injected toward the combustion chamber of the engine 107. A fuel discharge passage 105 for discharging the fuel and gas in the fuel case 101 into the fuel tank 102 is formed on the side surface of the fuel case 101.

  6 and 7 are views showing the fuel case disclosed in Patent Document 2 and the arrangement thereof, respectively. For simplicity of explanation, a part of the drawing is omitted and the reference numerals are reassigned.

As shown in FIG. 6, the fuel pump 110 is housed in a fuel case 101, and a fuel inflow passage 103 that leads to the fuel tank, fuel and gas in the fuel case 101, and fuel tank 102 are provided in the upper part of the fuel case 101. Each of the fuel discharge passages 105 to be discharged is opened. Further, a fuel supply passage 104 communicating with the fuel injection valve 106 is opened at the bottom of the fuel case 101. The fuel case 101 is divided into two housings 101A and 101B, the fuel inflow passage 103 and the fuel discharge passage 105 are opened in the housing 101A, and the fuel supply passage 104 is opened in the housing 101B. Has been. The fuel in the fuel tank 102 is supplied into the fuel case 101 from the fuel inflow passage 103 through the fuel pipe 111, and the fuel boosted by the fuel pump 110 is supplied from the fuel supply passage 104 through the fuel pipe 112 to the fuel injection valve 106. To be supplied.
JP 2000-297711 A JP 2004-284473 A

  However, when it becomes necessary to replace the fuel pump 110 or the filter of the fuel pump in the fuel case, in the structure of the fuel case 101 as shown in FIG. 5 or FIG. The fuel pipes communicating with each of the fuel discharge passages 105 cannot be provided with sufficient margins in a motorcycle or the like having a limited storage space. Is not easy. Accordingly, the fuel pipe 110 must be disconnected and the housing of the fuel case 101 can be removed, and then the operation of replacing the fuel pump 110 must be performed.

  This invention is made | formed in view of this point, The main objective is to provide a fuel pump module which is excellent in maintainability and has a high degree of attachment freedom.

  A fuel pump module according to the present invention is a fuel pump module that is disposed outside a fuel tank, and that contains a fuel pump into which fuel in the fuel tank is introduced and fed to an internal combustion engine, wherein the fuel pump module is The lid body and a casing detachably attached to the lid body, and the bottom of the casing is configured to store the fuel flowing in from the fuel tank. A fuel inflow passage through which fuel flows from the fuel tank and a fuel supply passage for feeding the fuel sucked up by the fuel pump to the internal combustion engine are fixed to the through portion, respectively. The fuel feed passage is connected to the fuel pump, and the fuel pump is supported by the lid through the fuel feed passage.

  In a preferred embodiment, a fuel discharge passage for returning the fuel in the housing to the fuel tank is further fixedly disposed in the plurality of through portions formed in the lid.

  In a preferred embodiment, the fuel pump module further includes a pressure regulator for adjusting the fuel sucked up by the fuel pump to a predetermined pressure, and the pressure regulator is supported by the lid body. Yes.

  In a preferred embodiment, the fuel inflow passage, the fuel supply passage, and the fuel discharge passage are formed integrally with the lid.

  In a preferred embodiment, the fuel pump module includes a fuel filter disposed between the fuel pump and the bottom of the housing, and the fuel filter removes the housing from the lid. Can be exchanged.

  In a preferred embodiment, the casing has a bottomed cylindrical shape, and the casing is screwed to the lid via a seal member.

  In a preferred embodiment, a gas vent passage for returning the gas in the housing to the fuel tank is formed in a part of the fuel discharge passage.

  In the motorcycle of the present invention, the fuel pump module is attached along the longitudinal direction of the body frame of the motorcycle.

  In a preferred embodiment, the fuel pump module is attached to the vehicle body frame by a bracket via a cushioning material.

  A fuel pump module according to the present invention includes a fuel inflow passage and a fuel supply passage (moreover, a fuel discharge passage) that are required to be connected to a fuel tank and a fuel injection valve by a fuel pipe, and a through portion formed in a lid. Since the housing that accommodates the fuel pump is detachably attached to the lid body, just removing the housing from the lid body while fixing the position of the fuel pipe, The fuel pump can be replaced easily.

  In addition, since nothing is provided on the side surface of the housing, when the fuel pump module is attached to the body frame of the motorcycle, it can be attached along any side surface, so that the degree of freedom of attachment is high.

  Since the accommodation space of the motorcycle is limited, it is difficult to allow a fuel pipe connected to the fuel tank and the fuel injection valve from a fuel case attached to a predetermined position of the motorcycle. Even in such a situation, it is preferable that the fuel pump in the fuel case can be replaced while the position of the fuel pipe is fixed.

  The inventor of the present application pays attention to the fact that the fuel case is usually composed of a combination of two upper and lower housings, and if these passages are concentrated in one housing, the fuel pipe is provided. It is considered that the fuel pump can be easily replaced by removing the other housing while being connected to these passages, and the present invention has been conceived.

  Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, components having substantially the same function are denoted by the same reference numerals for the sake of simplicity. In addition, this invention is not limited to the following embodiment.

  FIG. 1 is a diagram schematically showing a basic configuration of a fuel pump module 10 according to an embodiment of the present invention.

  The fuel pump module 10 includes a lid body 11 and a housing 12 that is detachably attached to the lid body 11. A fuel pump 13 is accommodated in the fuel pump module 10, and fuel sucked from a fuel tank (not shown) is accumulated at the bottom of the housing 12. A plurality of through portions 14 are formed in the lid body 11. A fuel inflow passage 15 that sucks fuel from the fuel tank and a pressurized fuel pressurized by the fuel pump 13 are supplied to the internal combustion engine (in the through portion 14). Fuel supply passages 16 for feeding to a not-shown are fixedly arranged. The fuel feed passage 16 is connected to the fuel pump 13, and the fuel pump 13 is supported by the lid body 11 via the fuel feed passage 16.

  Further, a fuel discharge passage 17 for returning the fuel in the housing to the fuel tank is further fixedly disposed in the plurality of through portions 14 formed in the lid 11.

  According to the above configuration, the fuel inflow passage 15 and the fuel supply passage 16 (and further the fuel discharge passage 17) connected to the fuel tank and the internal combustion engine (fuel injection valve) are formed in the lid body 11 through the fuel pipe. Since the housing 12 that accommodates the fuel pump 13 is detachably attached to the lid body 11 while being fixed to the penetrating portion 14 formed, the housing is kept in a fixed position with the fuel pipe being fixed. The fuel pump 13 can be easily replaced simply by removing 12 from the lid 11.

  That is, the casing 12 is closed with the fuel inflow passage 15 and the fuel supply passage 16 (and the fuel discharge passage 17) fixedly disposed on the lid body 11 being connected to the fuel pipe. Since it can be removed from the body 11, the fuel pump 13 can be easily replaced by simply disconnecting the fuel pump 13 from the fuel supply passage 16.

  Further, since nothing is provided on the side surface of the housing 12, when the fuel pump module 10 is attached to the body frame of the motorcycle, the fuel pump module 10 can be attached along any side surface, and the degree of freedom of attachment is increased. The shape of the housing 12 is preferably a cylindrical shape, but is not particularly limited, and may be a polygonal shape or an elliptical shape, for example.

  The fuel inflow passage 15, the fuel supply passage 16, and the fuel discharge passage 17 may be formed integrally with the lid body 11. In this case, since each of the passages 15, 16, and 17 can be handled integrally with the lid body 11, the fuel pump module 10 with high versatility can be provided by combining with the housing 12.

  In addition, as shown in FIG. 1, a fuel filter 18 may be disposed between the fuel pump 13 and the bottom of the housing 12. Even in this case, the fuel filter 18 can be removed from the fuel pump 13 and easily replaced by removing the housing 12 from the lid 11.

  FIG. 2 is a diagram showing an example of a configuration in which the fuel pump 13 and other components are actually accommodated in the fuel pump module 10. The basic configuration is the same as in FIG. 1, the fuel inflow passage 15, the fuel supply passage 16, and the fuel discharge passage 17 are disposed in the lid 11, and the fuel pump 13 is interposed via the fuel supply passage 16. And supported by the lid 11.

  As shown in FIG. 2, the bottomed cylindrical housing 12 is screwed to the lid body 11 via a seal member 20 at the upper portion thereof, thereby keeping the inside of the fuel pump module 10 sealed. . In addition, by screwing, the space required for fixing the cover body 11 and the housing | casing 12 can be reduced, and the compact fuel pump module 10 is realizable by this. Instead of screwing, it may be fixed with bolts.

  A pressure regulator 21 that adjusts the fuel supplied to the fuel injection valve to a predetermined pressure (for example, 250 KPa) is housed in the fuel pump module 10. The pressure regulator 21 is fitted into a pressure regulator fitting portion 22 supported by the lid 11 and supplies fuel to the pressure regulator 21 from a fuel passage 23 formed in a part of the fuel supply passage 16. The predetermined pressure may be a value that can inject fuel from the fuel injection valve toward the intake passage or the combustion chamber of the internal combustion engine.

  The pressure regulator 21 adjusts to a constant pressure by returning the fuel into the housing 12 when a predetermined pressure is exceeded. However, as a result of the fuel returning to the housing 12, the pressure in the housing 12 is reduced. When rising, the fuel in the housing 12 passes through the fuel discharge passage 17 and is returned to the fuel tank.

  A gas vent passage 24 for returning the gas generated in the housing 12 to the fuel tank is formed in a part of the fuel discharge passage 17. The gas in the housing 12 passes through the fuel discharge passage 17 and is discharged to the fuel tank. When the oil level of the fuel accumulated in the housing 12 is above the entrance of the fuel discharge passage 17, the gas escape place Will disappear. Even in such a case, in order to allow the gas to escape from the gas vent passage 24 formed in a part of the fuel exhaust passage 17 through the fuel exhaust passage 17, the gas vent passage 24 is provided as much as possible. It is preferable to form it at a position close to the lid body 11.

  The electric wiring 26 for driving the fuel pump 13 is easily guided into the fuel pump module 10 by forming a through-hole in the lid 11 and fixing the wiring connector 25 there. be able to.

  Next, an example in which the fuel pump module 10 according to the present invention is attached to a motorcycle will be described with reference to FIGS. FIG. 3 is a view showing a state in which the fuel pump module 10 is attached to a part of a vehicle body frame located below the fuel tank 40 of the motorcycle 50. FIG. 4 is an enlarged view of a part of the fuel pipe module 10 and the fuel tank 40 connected to the fuel tank 40.

  As shown in FIG. 4, the fuel pump module 10 is attached by a bracket 45 along the longitudinal direction of a body frame (not shown) of the motorcycle. Since the casing 12 of the fuel pump module 10 has a cylindrical shape in which nothing is disposed on the side surface thereof, it can be attached to the vehicle body frame along any side surface. In addition, if the housing | casing 12 is wound and mounted | worn with the bracket 45 via a shock absorbing material (for example, rubber sheet etc.), the influence on the fuel pump module 10 by the vibration of a vehicle body can be prevented. Further, since the fuel pump module 10 is arranged at a position away from the engine 30, it can be prevented from being affected by heat from the engine.

  The fuel inflow passage 15 disposed in the lid 11 of the fuel pump module 10 is connected to a fuel cock provided at the bottom of the fuel tank 40 via a fuel pipe 32. A fuel filter 41 may be attached in the middle of the fuel pipe 32. The fuel supply passage 16 disposed in the lid body 11 is connected to an internal combustion engine (not shown) via a fuel pipe 31. Further, the fuel discharge passage 17 disposed in the lid body 11 is connected to a gap in the upper part of the fuel tank 40 via a fuel pipe 33.

  The motorcycle in the above embodiment means a motorcycle, and includes a motor-equipped bicycle (motorbike) and a scooter, and specifically refers to a vehicle that can turn by tilting the vehicle body. Therefore, even if at least one of the front wheels and the rear wheels is two or more and the number of tires is counted as a tricycle / four-wheel vehicle (or more), it can be included in the “motorcycle”.

  As mentioned above, although this invention was demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. For example, in the above-described embodiment, an example in which the fuel pump module is mounted on a motorcycle has been described. You can also. In particular, the fuel pump module of the present invention is effective when mounted and installed in a place where there is a restriction in maintenance space.

  The present invention exerts the excellent effects as described above. However, when applied to an actual motorcycle or the like, a specific embodiment thereof is taken under a comprehensive viewpoint including other requirements. Is considered.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in maintainability and can provide a fuel pump module with a high attachment freedom degree.

It is a figure which shows the basic composition of the fuel pump module in this invention. It is a figure which shows an example of the specific structure of the fuel pump module in this invention. 1 is a view showing a state where a fuel pump module according to the present invention is attached to a motorcycle. FIG. It is a figure which shows the arrangement | positioning state of the fuel piping of the fuel pump module in this invention. It is a figure which shows the structure of the conventional fuel case, and the state of its piping. It is a figure which shows the structure of the conventional fuel case. It is a figure which shows the state of piping of the conventional fuel case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fuel pump module 11 Cover 12 Tubular housing 13 Fuel pump 14 Through part 15 Fuel inflow path 16 Fuel feed path 17 Fuel discharge path 18 Fuel filter 20 Seal member 21 Pressure regulator 22 Pressure regulator insertion part 23 Fuel path 24 Gas Drain passage 25 Wiring connector 26 Electrical wiring 30 Engine 31, 32, 33 Fuel piping 40 Fuel tank 41 Fuel filter 45 Bracket 50 Motorcycle 101 Fuel case 102 Fuel tank 103 Fuel inflow passage 104 Fuel feed passage 105 Fuel discharge passage 106 Fuel injection Valve 107 Engine 110 Fuel pump 111, 112 Fuel piping

Claims (9)

A fuel pump module which is disposed outside the fuel tank, and which contains a fuel pump into which fuel in the fuel tank flows and is fed to the internal combustion engine,
The fuel pump module is composed of a lid and a casing detachably attached to the lid, and the fuel flowing from the fuel tank is accumulated at the bottom of the casing.
A plurality of through portions are formed in the lid, and a fuel inflow passage through which fuel from the fuel tank flows and fuel sucked up by the fuel pump are supplied to the internal combustion engine. Fuel supply passages are fixedly arranged,
The fuel pump module is connected to the fuel pump, and the fuel pump is supported by the lid through the fuel feed path.   2. The fuel discharge passage for returning the fuel in the casing to the fuel tank is further fixedly disposed in the plurality of through portions formed in the lid body, according to claim 1. Fuel pump module. The fuel pump module further contains a pressure regulator that adjusts the fuel sucked up by the fuel pump to a predetermined pressure,
The fuel pump module according to claim 1 or 2, wherein the pressure regulator is supported by the lid.   The fuel pump module according to claim 1, wherein the fuel inflow passage, the fuel supply passage, and the fuel discharge passage are formed integrally with the lid body. The fuel pump module is provided with a fuel filter between the fuel pump and the bottom of the housing,
The fuel pump module according to claim 1, wherein the fuel filter is replaceable by removing the casing from the lid.   6. The fuel pump module according to claim 1, wherein the casing has a cylindrical shape, and the casing is screwed to the lid through a seal member. .   The fuel pump module according to claim 2, wherein a gas vent passage for returning the gas in the housing to the fuel tank is formed in a part of the fuel discharge passage.   A motorcycle, wherein the fuel pump module according to any one of 1 to 7 is attached along a longitudinal direction of a body frame of the motorcycle.   The motorcycle according to claim 8, wherein the fuel pump module is attached to the vehicle body frame by a bracket via a cushioning material.

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