WO2003062627A1

WO2003062627A1 - Fuel feeder

Info

Publication number: WO2003062627A1
Application number: PCT/JP2003/000103
Authority: WO
Inventors: Takashi Saito
Original assignee: Mikuni Corporation
Priority date: 2002-01-24
Filing date: 2003-01-09
Publication date: 2003-07-31
Also published as: TW200302315A; JP2003214276A

Abstract

A fuel feeder, wherein a pump module (20) having a plunger pump (30) sucking and force-feeding fuel by an electromagnetic motive force and a fuel pressure regulator (50) for regulating the pressure of the force-fed fuel and a mounting flange member (80) installed on a fuel tank (1) are formed separately from each other, and connected to each other by using a connection member (90) through a mount rubber (71) and by using elastically deformable fuel passage member (100) and vapor passage member (110) formed of rubber hoses, whereby the device can be applied to various types of fuel tanks merely by properly changing the connection member (90), fuel passage member (100), and vapor passage member (110), vibration and noise resulting from the plunger pump can be reduced, and fuel feeding devices installed in the fuel tanks of motorcycles can be commonized to each other.

Description

T JP03 / 00103

Description Fuel supply device Technical field

The present invention relates to a fuel supply device applied to supply fuel to an indicator of an internal combustion engine (hereinafter, referred to as an engine), and particularly to a fuel supply device for a vehicle such as a motorcycle equipped with a small displacement engine. The present invention relates to a fuel supply device installed in a country. Background art

2. Description of the Related Art As a system for supplying fuel to an engine mounted on a four-wheeled vehicle or the like, a fuel supply device in which a fuel pump, a fuel pressure regulator, a filter, and the like are integrated and disposed in a fuel tank is known. As a fuel pump constituting the fuel supply device, for example, a circumferential flow type turbine pump is employed.

The turbine pump has a relatively large and complicated structure including a pump section and a motor section, and has no self-priming capability. Therefore, the turbine pump is disposed in the fuel tank. Therefore, this fuel supply device is suitable when accommodated in a relatively large fuel tank such as a fuel tank of a four-wheeled vehicle.

By the way, in engines with small displacement, such as motorcycles equipped with an engine of about 50 cc to 250 cc per cylinder, the fuel tank is relatively small, and its shape is limited. Therefore, it is difficult to accommodate the above-described fuel supply device in a fuel tank.

In motorcycles, etc., the engine, fuel tank, etc. are relatively close Since the fuel supply system is located in an area where the fuel is supplied, the fuel supply system should be minimized by the effects of radiant heat from the engine, and the system itself should be simplified as much as possible in order to avoid damages such as overturning. Need to be reduced or not exposed to the outside world.

Also, if the fuel temperature in the fuel tank rises due to radiant heat from the engine or other factors, vapor (bubbles) may be generated near the bottom of the fuel tank. It is necessary to ensure the desired fuel discharge performance and supply a stable fuel.

Furthermore, various types of fuel tanks having different depths or outer contours, for example, are set according to the type of vehicle, so it is necessary to be able to apply any type of fuel tank. In addition, it is necessary to reduce vibration, noise, etc. caused by the driving source of fuel supply.

The present invention has been made in view of the above points, and has as its object to reduce the size, simplify the structure, improve functional reliability, ensure stable fuel discharge performance, It is an object of the present invention to provide a fuel supply device suitable for vehicles such as a motorcycle equipped with a small-displacement engine, for common use, reduction of vibration and noise, and the like. Disclosure of the invention

The fuel supply device of the present invention is a fuel supply device that is installed in a fuel tank and supplies fuel to an injector of an internal combustion engine. The fuel supply device reciprocates by an electromagnetic starting force and sucks fuel through a suction filter. Pump module consisting of a plunger pump for pumping and pumping and a fuel pressure regulator having a discharge section for adjusting and discharging the pressure of the pumped fuel, and a fuel passage section defining a fuel passage and attached to the fuel tank. Connecting member for detachably connecting the pump module and the mounting flange member And a fuel passage member for detachably connecting the discharge section and the fuel passage section to communicate with each other.

According to this configuration, the pump module and the mounting flange member are detachably connected via the connecting member and the fuel passage member. Therefore, this device is of a different type, for example, a fuel tank having a different depth and a different mounting portion. In the case of applying the present invention, it is possible to cope with it only by changing the connecting member, the fuel passage member and the mounting flange member, and a common pump module can be applied. In addition, when the present invention is applied to a fuel tank having only a different depth, it can be dealt with only by changing the connecting member and the fuel supply member, and a common pump module and a mounting flange member can be applied.

In the above configuration, the suction filter has a discharge portion for discharging the vapor generated inside, and the mounting flange member has a vapor passage portion through which the vapor passes and which opens into the fuel tank. A structure having a vapor passage member for detachably connecting and communicating the portion and the vapor passage portion can be adopted.

According to this configuration, the vapor generated in the suction filter can be guided upward through the vapor passage member, and can be discharged from the opening to the upper space in the fuel tank through the vapor passage portion formed in the mounting flange member. In addition, since the vapor passage member is detachable from the mounting flange member and the pump module (the discharge portion of the suction filter), the vapor passage member can be changed to a different type of fuel tank simply by changing the vapor passage member. Therefore, a common pump module and a common mounting flange member can be used.

In the above configuration, a configuration can be adopted in which the pump module and the mounting flange member are connected via an elastic body.

According to this configuration, vibration and noise caused by the pump module are reduced. The elastic body (that is, the soft mount structure) blocks the transmission and suppresses or prevents transmission to the mounting flange member. As a result, vibration and noise transmitted to the outside can be reduced.

In the above configuration, it is possible to employ a configuration in which the fuel passage member is formed of a resin material so as to be elastically deformable.

According to this configuration, since the fuel passage member interposed between the mounting flange member and the pump module is formed of a resin material (for example, a rubber hose or the like) that is elastically deformable, the fuel passage member also has vibration and noise. It functions as an elastic body that cuts off air. As a result, the vibration and noise transmitted to the outside can be further reduced.

In the above configuration, it is possible to adopt a configuration in which the vapor passage member is formed of a resin material so as to be elastically deformable.

According to this configuration, since the vapor passage member interposed between the mounting flange member and the pump module (discharge portion of the suction filter) is formed of a resin material (for example, a rubber hose or the like) that can be deformed in a unidirectional manner. This vapor passage member also functions as an elastic body that blocks vibration and noise. As a result, vibration and noise transmitted to the outside can be further reduced.

In the above configuration, it is possible to adopt a configuration in which the pump module has a connecting portion for connecting to the connecting member, and the connecting portion is fixed to the pump module via an elastic member.

According to this configuration, since an elastic member (elastic body) for isolating vibration and noise is physically attached to the pump module, various changes can be made only by changing the connecting member. The fuel tank can be easily attached to the fuel tank, and functions such as vibration isolation can be secured at the same time as assembly. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic diagram of a fuel supply system showing a state in which an embodiment of a fuel supply device according to the present invention is installed in a fuel tank.

FIG. 2 is a side view showing an embodiment of the fuel supply device according to the present invention.

FIG. 3 is a side view showing a pump module constituting a part of the fuel supply device according to the present invention.

FIG. 4 is a side view showing a mounting flange member constituting a part of the fuel supply device according to the present invention.

FIG. 5 is a side view showing another embodiment of the fuel supply device according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 show one embodiment of a fuel supply device according to the present invention. The fuel supply device 10 according to this embodiment constitutes a part of a fuel supply system for supplying fuel to an injector driven by an electromagnetic valve in an engine that injects fuel by electronic control. As shown in Fig. 1, the fuel is supplied through the supply pipe 5 to the injector 4 installed in the fuel tank 1 of the motorcycle and attached to the intake port 3 of the engine 2 as shown in Fig. 1. ing.

As shown in FIGS. 1 and 2, the fuel supply device 10 connects the pump module 20, the mounting flange member 80 attached to the fuel tank 1, the pump module 20 and the mounting flange member 80. A connecting member 90, a fuel passage member 100, a vapor passage member 110, and the like.

As shown in FIGS. 2 and 3, the pump module 20 is electromagnetically activated. A plunger pump 30 that reciprocates by force to suction and pump fuel, a fuel pressure regulator 50 that adjusts and discharges the pressure of fuel pumped from the plunger pump 30, and is attached to the lower part of the plunger pump 30. The suction filter 60, the connecting portion 70, and the like are integrally formed.

The plunger pump 30 is an electromagnetically driven positive displacement pump. As shown in FIG. 3, the plunger 3 2 is inserted so as to slide in the cylinder 31 and the cylinder 31 and reciprocate linearly. The yoke 33 fitted on the outer periphery of the cylinder 32, the exciting coil 34 wound on the bobbin 34a fitted on the outer periphery of the yoke 33, and a resin for covering the outer periphery of the coil 34 An outer case 35 made of a material or the like is provided.

An end face wall 33a is formed at the upper end of the yoke 33, and a through hole 33a 'is formed at the center of the end wall 33a' to communicate with the outside. A coil spring 36 a is disposed between the end wall 33 a and the plunger 32. The lower end 33 b of the yoke 33 is fitted to the passage forming member 37.

A passage member 38 in which a fuel passage 38 a having a suction port 38 a ′ at a lower end is formed is fitted to the passage forming member 37. The passage member 38 holds the port valve 39 for opening and closing the fuel passage 38a in a state of being biased in the closing direction by a spring 39a. Further, between the upper end surface of the passage member 38 and the plunger 32, a coil coupling 36b is disposed. The passage forming member 37 has a fuel passage 40 extending in a direction perpendicular to the reciprocating direction of the plungers 32 and having a plurality of discharge ports 40 a ′ formed in a cutout groove on the side surface. The passage member 40 forming a is fitted. The passage member 40 holds the check valve 41 for opening and closing the fuel passage 40a in a state of being urged in the closing direction by the spring 41a. In addition, passage In the member 40, the circular hole formed at the downstream end of the check valve 41 functions to release air from the space accommodating the spring 41a.

The fuel pressure regulator 50 is an inlet control type regulator for adjusting the fuel pressure (fuel pressure) upstream of the injector 4, and is formed as a part of the passage forming member 37 as shown in FIG. Discharge port of member 40

A horizontal cylinder portion 51 defining a fuel passage 51a communicating with 40a ', a vertical cylinder portion serving as a discharge portion defining a fuel passage 52a communicating with the fuel passage 51a and extending vertically. 52. A pressure receiving section that is located between the fuel passage 51 a and the fuel passage 52 a and opens and closes both passages to adjust the fuel pressure.

It has 5 3 etc.

As shown in FIG. 3, a check valve 54 for opening and closing the fuel passage 51 a is held in the horizontal tubular portion 51 in a state where the check valve 54 is urged in a closing direction by a spring 54 a. The check valve 54 and the spring 54a also have a function of adjusting the fuel pressure.

The vertical cylindrical portion 52 as a discharge portion forms a connector pipe for connecting the fuel passage member 100.

As shown in FIG. 3, a pressure receiving operation portion 53 is disposed in an intersecting space between the fuel passage 51 a extending in the horizontal direction and the fuel passage 52 a extending in the vertical direction. The pressure receiving operation portion 53 is formed by a center disk 53a, a spring 53b, and a cover cap 53c having a through hole. Then, a part of the center disk 53 a comes into contact with the needle 54 b of the check panoleb 54 to open the check valve 54 against the biasing force of the spring 54 a. ing.

The suction filter 60 is formed in a flat shape with a substantially rectangular outline, and as shown in FIG. It is formed by a fitting cylinder portion 62 for connecting the lower end of the passage forming member 37 to the lower end of the passage forming member 37, a discharge portion 63 connected to the vapor passage member 110, and the like.

The connecting portion 70 is formed by a mount rubber 71 as an elastic member (elastic body), a connecting bracket 72 formed so as to surround the mount rubber 71, and the like. The mount rubber 71 covers the upper end of the yoke 33 and has a through-hole 71a, and has elastic characteristics to absorb or block vibration and noise generated by reciprocation of the plunger 32. It is. The connection bracket 72 is fixed to the mount rubber 71, has a through hole 72a on its upper surface, and a screw hole 7 for connecting to the connecting member 90 to a protruding piece 72b protruding from its upper surface. 2b.

As shown in FIG. 4, the mounting flange member 80 includes a flange portion 81 attached to the fuel tank 1, a pipe connector 82 projecting outside the flange portion 81 and connecting the supply pipe 5, Electrical connector for making electrical connection of plunger pump 30 to coil 34.83, Flange 81 Hanging piece 84, projecting downward from flange 81, Connecting pipe 85, and connecting pipe Has 8 6

The hanging piece 84 is for connecting the connecting member 90, and has a screw hole 84a. The connection pipe 85 is for connecting the fuel passage member 100, and forms a fuel passage portion defining the fuel passage 85a. The connection pipe 86 is for connecting the vapor passage member 110, and defines a fuel passage 86a and an opening 86b opening to the space (air space) in the fuel tank 1. A passage portion is formed. Here, a filter 87 is provided in the vicinity of the opening 86b to prevent dust and the like from entering the fuel passage 86a.

As shown in FIG. 2, the connecting member 90 includes a hanging piece 84 of the mounting flange member 80 and a connecting portion 70 (connecting bracket 72) of the pump module 20. It is formed by pressing a sheet metal or molding a resin material.

The connecting member 90 is detachably connected to the hanging piece 84 and the protruding piece 72 b of the connecting bracket 72 by a fastening screw 91 or the like. Here, since the mount rubber 71 as an elastic body is interposed between the connection bracket 72 and the plunger pump 30, vibration, noise, and the like caused by the reciprocating motion of the plunger 32 are not included in this mount. Absorbed or attenuated (blocked) by the rubber 71, transmission to the connecting member 90 is prevented or suppressed.

As shown in FIG. 2, the fuel passage member 100 is for connecting the connecting pipe 85 of the mounting flange member 80 to the vertical cylindrical portion (discharge portion) 52 of the pump module 20. It is formed to be elastically deformable using a resin material or the like. For example, a rubber hose or the like is applied.

The fuel passage member 100 is detachably connected by being fitted to the connection pipe 85 and the vertical tubular portion 52. At the time of connection, a clamp or the like for tightening the outer periphery of the fuel passage member 100 may be employed to surely prevent the fitting portion from falling off.

Here, since the fuel passage member 100 is elastically deformable, it does not have a role of an elastic body to absorb or attenuate vibration, noise, and the like. Effectively prevent or suppress transmission to 80.

As shown in FIG. 2, the vapor passage member 110 is used to connect the connection pipe 86 of the mounting flange member 80 to the discharge part 63 formed in the suction filter 60 of the pump module 20. It is formed to be elastically deformable using a resin material or the like. For example, a rubber hose or the like is applied. Then, the vapor passage member 110 is connected to the connection pipe 86 and the discharge portion 63. By being fitted, they are detachably connected. At the time of connection, a clamp or the like for tightening the outer periphery of the vapor passage member 110 may be employed to surely prevent the fitting portion from falling off.

Here, since the vapor passage member 110 is elastically deformable, it does not have a role of an elastic body that absorbs or attenuates vibration, noise, and the like. Effectively preventing or suppressing transmission to zero.

Next, the operation of the fuel supply device will be described. First, by energizing the coil 34, the plunger 32 moves upward in the reciprocating direction against the urging force of the coil springs 36a and 36b. At the same time, the pressure difference causes the port valve 39 to open against the urging force of the spring 39a, so that fuel is sucked from the inlet 38a and flows into the space V1. Thereafter, the plunger 32 stops when the electromagnetic force and the biasing forces of the coil springs 36a and 36b are balanced.

When the energization of the coil 34 is cut off, the plunger 32 moves downward by the urging force of the coil springs 36a and 36b, and compresses the fuel in the space VI. When the fuel is compressed beyond a predetermined pressure, the check valve 41 is opened against the urging force of the spring 41a, and the compressed fuel is discharged from the discharge port 40a.

The above operation has been described with reference to the basic operation when the plunger 32 reciprocates once.However, in the normal operation, the electromagnetic force generated by the duty control of the energization of the coil 34 is considered. The interaction between the coil springs 36a and 36b and the biasing force in the return direction causes the plunger 32 to reciprocate continuously, and a predetermined volume of fuel corresponding to the movement stroke is continuously supplied. The liquid is sucked from the suction port 38a and discharged from the discharge port 40a 'at a predetermined pressure. Further, in the fuel passages 51 a and 52 a downstream of the discharge port 40 a ′, the pressure receiving operation part 53 of the fuel pressure regulator 50 acts to make the fuel passage 52 a or the diaphragm C When the pressure is equal to or higher than the predetermined pressure, the check valve 54 closes the fuel passage 51a by the biasing force of the spring 54a.

In this state, when the pressure of the fuel in the fuel passage 52a becomes lower than a predetermined level, the center disk 53a force S is actuated by the urging force of the spring 53b to press the needle 54b, and the check valve 5b. 4 is opened. As a result, the fuel on the upstream side of the fuel passage 51a flows into the diaphragm C and is guided to the fuel passage 52a. Then, when the pressure of the fuel in the fuel passage 52 a becomes equal to or higher than a predetermined level, the pressure operates the pressure receiving operation part 53 to close the check valve 54.

On the other hand, when the temperature of the fuel in the fuel tank 1 becomes high, vapor (bubbles) is likely to be generated in the lower region of the fuel tank 1 and inside the suction filter 60. The generated vapor is immediately passed through the vapor passage member 110 without stagnating inside, and is released into the air in the fuel tank 1 from the opening 86 b. As a result, even when the fuel is in a high temperature state, stable discharge performance is ensured without a decrease in flow rate, and a predetermined flow rate of fuel is supplied stably.

As shown in FIG. 2, this device is composed of parts consisting of a pump module 20, a mounting flange member 80, a connecting member 90, a fuel passage member 100, and a vapor passage member 110. Each is formed by assembling.

Therefore, a connecting member 90, a fuel passage member 100, and a vapor passage member 110 having a length corresponding to the depth H of the fuel tank 1 are prepared in advance. Then, by assembling each part, the device as shown in Fig. 2 is completed. After that, the lower part of the mounting flange member 80 (pump module 20 etc.) is inserted into the fuel tank 1, and the mounting flange member 80 is fixed to the mounting part of the fuel tank 1. Assembly to is completed.

Therefore, for various types of fuel tanks 1 having different depths H, only the connecting member 90, the fuel passage member 100, and the vapor passage member 110 need to be changed. Application becomes possible. That is, since the common pump module 20 and the mounting flange member 80 can be applied to various fuel tanks 1, the cost can be reduced by sharing parts.

FIG. 5 shows an embodiment in which the fuel supply device according to the present invention is applied to a fuel tank 1 having an inclined mounting portion.

As shown in FIG. 5, this device 10 ′ has the same pump module 20 and mounting flange member 80 as the above-described embodiment, and a connecting member 9 having a length and shape different from those of the above-described embodiment. 0 The fuel passage member 100 is formed by a vapor passage member 110.

In other words, the connecting member 90 ′, the fuel passage member 100, and the vapor passage member 110 ′ are formed in a substantially bent shape in the middle in accordance with the inclination of the mounting portion. Have been. As described above, even if the fuel tank 1 ′ has an inclined mounting portion, the components (the connecting member 90 ′, the fuel passage member 100 ′, and the connecting member) connecting the pump module 20 and the mounting flange member 80 can be used. It can be applied by simply changing the vapor passage member 110 as appropriate.

In the above embodiment, in the configuration employing the vapor passage members 110, 110 ′ for releasing the vapor generated in the suction filter 60, the pump module 20 and the mounting flange member 80 are separated from each other. The configuration in which the connection is detachable is shown, but the present invention is not limited to this. In the configuration in which the vapor passage members 110 and 110 ′ are eliminated, the pump module 20 and the mounting A configuration in which the flange member 80 is detachably connected to the flange member 80 may be employed.

In the above embodiment, the connecting members 90, 90, the fuel passage members 100, 100, and the vapor passage members 110, 110 are formed independently. The connecting member, the fuel passage member, and the vapor passage member are integrally formed as a connection and a passage member, and the connection member and the fuel passage member and the mounting flange member 80 or the pump module 2 are not limited thereto. A configuration may be adopted in which a mount rubber as an elastic body is interposed between 0 and 0. Further, the connecting members 90, 90 are connected with the fastening screw 91, but the present invention is not limited to this, and the connecting members 90, 90 may be connected by a snap-fit connection or the like without using the fastening screw 91. .

Further, in the above-described embodiment, the case where the fuel supply device 10, 10 ′ is installed in the fuel tank 1, 1 ′ of the motorcycle is shown. However, the present invention is not limited to this. For example, general-purpose engines such as carts for tricycles or four-wheeled vehicles, lawnmowers, generators, or ships such as leisure boats, and even small-displacement engines such as snowmobiles and relatively small fuels The present invention can be preferably applied to a vehicle equipped with a tank. Industrial applicability

As described above, according to the fuel supply device of the present invention, the pump module and the mounting flange member are formed separately, and the detachable connecting member and the fuel passage member further form the vapor supply member. By being able to be connected, it can be applied to various types of fuel tanks. As a result, parts can be shared and cost reduction can be achieved. In addition, by providing an elastic body that absorbs or attenuates vibration or noise, etc. in a part of the connecting member, vibration and noise caused by the plunger pump can be reduced. Noise and noise can be prevented or suppressed from being transmitted to the outside ₍

Claims

The scope of the claims

1. A fuel supply device installed in a fuel tank for supplying fuel to an injector of an internal combustion engine,

A pump module including a plunger pump that reciprocates by an electromagnetic actuation force to suck and pump fuel through a suction filter, and a fuel pressure regulator having a discharge unit that adjusts and discharges the pressure of the pumped fuel; and a fuel module. A mounting flange member having a fuel passage portion defining a passage of the fuel tank and being attached to the fuel tank;

A connecting member for detachably connecting the pump module and the mounting flange member,

A fuel passage member for detachably connecting and communicating the discharge portion and the fuel passage portion;

A fuel supply device, comprising:

2. The suction filter has a discharge part for discharging vapor generated inside,

The mounting flange member has a vapor passage portion through which the vapor passes and which opens into the fuel tank.

A vapor passage member for detachably connecting the discharge section and the vapor passage section to communicate with each other;

2. The fuel supply device according to claim 1, wherein:

3. The pump module and the mounting flange member are connected via an elastic body.

3. The fuel supply device according to claim 1, wherein:

4. The fuel passage member is formed of a resin material so as to be elastically deformable. The fuel supply device according to any one of claims 1 to 3, wherein

5. The vapor passage member is formed of a resin material so as to be elastically deformable.

The fuel supply device according to any one of claims 2 to 4, characterized in that:

6. The pump module has a connecting portion for connecting to the connecting member,

The connecting portion is fixed to the pump module via a flexible member.

The fuel supply device according to any one of claims 3 to 5, wherein