JP2003049732A - Fuel feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize a fuel feed device installed in a fuel tank of a two- wheeler or the like. SOLUTION: As a fuel feed device 10 to be installed in the fuel tank 1, a displacement type plunger pump 20 provided with a plunger which linearly reciprocates to suck and force-feed fuel, and an inlet control type combustion pressure regulator 50 communicated to a delivery port 36a' of it to regulate pressure of fuel fed to an injector 4 are coupled with each other to form a module. The fuel feed device 10 can thus be compact as a whole body, and especially, it is convenient for installation onto a small fuel tank of the two- wheeler or the like.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an internal combustion engine (hereinafter,
The present invention relates to a fuel supply device applied to supply fuel to an injector (referred to as an engine), and particularly to a fuel supply device installed in a fuel tank of a vehicle such as a motorcycle equipped with a small displacement engine.

[0002]

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 integrally incorporated and arranged in a fuel tank is known. ing. As a fuel pump which constitutes this fuel supply device, for example, a circumferential flow type turbine pump is adopted. The turbine pump has a relatively large and complicated structure including a pump portion, a motor portion, and the like, and since it has no self-priming ability, it is arranged in the fuel tank. Therefore, this fuel supply device is suitable when the fuel supply device is housed in a relatively large fuel tank such as a fuel tank of a four-wheeled vehicle.

[0003]

By the way, in a small displacement engine, such as a two-wheeled vehicle equipped with an engine of about 50 cc to 250 cc per cylinder, the fuel tank is relatively small, and its shape is also small. Due to restrictions, it is difficult to accommodate the above fuel supply device in the fuel tank. In addition, in motorcycles, etc., the engine, fuel tank, etc. are arranged in relatively close areas, so the fuel supply system should be as insensitive to radiant heat from the engine as possible and should not fall down. In order to avoid damage to the system, it is necessary to simplify the system as much as possible to reduce the number of parts themselves or to prevent them from being exposed to the outside.

The present invention has been made in view of the above points, and it is an object of the present invention to achieve downsizing, simplification of structure, improvement of functional reliability, etc., especially for small displacement. It is to provide a fuel supply device suitable for a vehicle such as a two-wheeled vehicle equipped with an engine.

[0005]

SUMMARY OF THE INVENTION A fuel supply system of the present invention is a fuel supply system installed in a fuel tank for supplying fuel to an injector of an internal combustion engine, the pump defining a suction port and a discharge port. Towards the positive displacement plunger pump including the main body, the plunger that reciprocates linearly in the pump main body to suck and pump the fuel, the electromagnetic coil that drives the plunger, and the inflow passage and the injector that communicate with the discharge port. A fuel pressure regulator including a regulator valve that defines a supply passage for supplying fuel, and a fuel pressure regulator that is disposed between the inflow passage and the supply passage and adjusts the pressure of the fuel. The feature is that they are integrally connected. According to this configuration, the plunger pump itself capable of pressure-feeding the fuel by the reciprocating motion of the plunger is formed to be relatively small, and the small plunger pump and the fuel pressure regulator are integrally formed (modularized). A fuel supply device that is small in size as a whole and is convenient to handle is provided, and it is particularly convenient to install the fuel supply device in a small fuel tank such as a motorcycle.

In the above structure, the reciprocating direction of the plunger and the extending direction of the supply passage may be formed to be substantially parallel to each other. According to this configuration, the plunger and the supply passage are formed so as to be substantially parallel to each other, that is, the longitudinal direction of the pump body and the longitudinal direction of the regulator body are substantially parallel to each other. Is further downsized (compact). In particular, the outer contour of the device can be made into a compact and convenient contour shape such as, for example, a quadrangular prism shape or a substantially cylindrical shape.

In the above structure, the regulator main body is
A mounting flange portion is formed on the upper side in the extending direction so as to be attached to the fuel tank, and the pump body has an inlet port formed on the lower side in the reciprocating direction and a filter attached around the inlet port. , Configuration can be adopted. According to this structure, the filter is located on the lower side, the pump body and the regulator body are located in the middle, and the mounting flange portion is located on the upper side. It can be easily installed inside and can be handled as a module product including the filter.

In the above structure, it is possible to employ a structure in which the regulator body is provided with a pulsation damper which communicates with the supply passage and absorbs the pulsation of fuel. With this configuration, it is possible to efficiently absorb and attenuate the pulsation or pressure fluctuation of the fuel, that is, the pulsation, that occurs during fuel injection. Further, by providing the pulsation damper in the regulator main body, the device can be downsized by integrating the components.

In the above structure, the pump main body and the regulator main body have the first connecting portion and the second connecting portion which are detachably formed in the direction substantially perpendicular to the reciprocating direction and the extending direction, and the first connecting portion is It is possible to adopt a configuration in which the electrical connector provided in the regulator main body also serves as an electrical connector that connects the electrical wiring of the electromagnetic coil, and the second connecting portion also serves as a communication passage that connects the discharge port and the inflow passage. According to this configuration, the plunger pump and the fuel pressure regulator are detachable via the first connecting portion and the second connecting portion, so that the assembly is easy, and they are formed of different materials, for example, The plunger pump can be made of a metal material or the like, and the fuel pressure regulator can be made of a resin material or the like. Further, since the first connecting portion and the second connecting portion also serve as the electric connector and the fuel passage, the structure can be simplified as compared with the case where they are separately formed.

In the above structure, the pump main body and the regulator main body can be detachably connected by a snap fit. According to this structure, since the two can be connected by a simple one-touch operation, a special connecting component such as a fastening screw is unnecessary, and the structure can be simplified, downsized, and lightened.

In the above structure, the pump body may have a structure having an adjusting means for adjusting the distance between the first connecting portion and the second connecting portion. According to this configuration, when the pitch between the first connecting portion and the second connecting portion is different between the plunger pump side and the fuel pressure regulator side, the deviation is adjusted by the adjusting means, so that the both can be easily assembled. become.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 7
Shows an embodiment of a fuel supply device according to the present invention. A fuel supply device 10 according to this embodiment constitutes a part of a fuel supply system for supplying fuel to an injector driven by a solenoid valve in an engine that injects fuel by electronic control. As shown in 1,
The fuel is supplied through a supply pipe 5 to an injector 4 installed in a fuel tank 1 of a motorcycle and attached to an intake port 3 of an engine 2.

As shown in FIGS. 2 and 3, the fuel supply device 10 includes a positive displacement plunger pump 20 and an inlet control type fuel pressure regulator 50 for adjusting the fuel pressure upstream of the injector 4. It is integrated and modularized without using piping for the use. The outer contour has a height H of about 80 mm to 10 mm.
About 0 mm, about 70 mm to 80 mm at the mounting flange with the largest outer diameter D, and the width W of the main body is about 4
It is compactly integrated (consolidated) to a size of 0 mm to 60 mm, and is formed in a small size as a whole and a contour convenient for handling.

The plunger pump 20 is an electromagnetically driven positive displacement pump, and as shown in FIG. 4, a cylinder 21 and a plunger 22 and a cylinder 22 inserted so as to linearly reciprocate by sliding in the cylinder 21. The upper core 23 and the lower core 24 fitted to the outer circumference of the coil 21, the electromagnetic coil 26 wound around the bobbin 25 fitted to the outer circumferences of the upper core 23 and the lower core 24, and the outer circumference of the electromagnetic coil 26 are covered. Outer case 27 formed of a resin material or the like, as shown in FIGS. 6 and 7.
As shown in FIG. 5, the bracket 28 is attached around the outer case 27, the retaining plate 29, the wave washer 30 as an adjusting means disposed between the bobbin 25 and the retaining plate 29, and the like.

At the upper end of the upper core 23, an end face wall 23a is formed.
Is formed, and a through hole 23a 'is formed in the center thereof to communicate with the outside. A coil sling ring 31 is arranged between the end wall 23a and the plunger 22. At the lower end of the lower core 24, a suction port 32a '
A passage member 32 having a passage 32a formed at the lower end is formed. The passage member 32 holds a check valve 33 that opens and closes the passage 32a in a state of being biased in a closing direction by a spring 34. A coil spring 35 is arranged between the upper end surface of the passage member 32 and the plunger 22. A joint member 36 as a second connecting portion that extends in a direction perpendicular to the reciprocating direction L1 of the plunger 22 and forms a passage 36a having a discharge port 36a 'at its tip is connected to the side surface of the lower core 24. Has been done. The joint member 36 is a check valve 3 that opens and closes the passage 36a.
7 is held in a state of being biased in the closing direction by a spring 38.

The lower end of the lower core 24 (ie,
A filter 40 is attached around the suction port 32a '. The filter 40 is formed of a filter body 41, a fitting tubular portion 42 for coupling the filter body 41 to the lower core 24, and a protruding piece 43 that projects radially outward from the outer periphery of the fitting tubular portion 42. ing.

On the upper side surface of the outer case 27, a female electric connector 39 is formed as a first connecting portion which projects in a direction perpendicular to the reciprocating direction L1 of the plunger 22 and has a connecting hole 39a. The electric connector 39 holds the terminal 26a as the electric wiring of the electromagnetic coil 26 in a state of being exposed in the connection hole 39a.

As shown in FIGS. 6 and 7, the bracket 28 has an inverted U-shape, and two engaging pieces 2 extending from one side surface thereof in a direction H1 perpendicular to the reciprocating direction L1.
8a, and the engaging piece 28a has a substantially rectangular hooking hole 28.
a'is formed. The bracket 28 is connected to the latch plate 29 via a latch claw 28c.

That is, the outer case 27 forming the electrical connector 39 and the passage member 32 defining the suction port 32a '.
And the lower core 24, the joint member 36 defining the discharge port 36a ′, the bracket 28, etc.
A pump body is formed that is directly coupled to the.

The operation of the plunger pump 20 will be described. First, when the plunger 22 moves upward in the reciprocating direction L1 by energizing the electromagnetic coil 26, the check valve 33 is acted against the urging force of the spring 34 due to the pressure difference. The valve is opened, and the fuel is sucked from the suction port 32a 'and flows into the space S1.

When the electromagnetic coil 26 is de-energized, the plunger 22 stops and the check valve 33 closes. At the same time, the urging force of the coil springs 31 and 35 causes the plunger 22 to move in the reciprocating direction L1. The fuel in the space S1 is compressed by moving downward. When the fuel is compressed to exceed the predetermined pressure, the check valve 37 opens against the biasing force of the spring 38, and the discharge port 36 is opened.
The compressed fuel is discharged from a '. After that, when the biasing forces of the coil springs 31 and 35 are balanced, the plunger 22 stops. The above operation has been described with respect to the basic operation when the plunger 22 reciprocates once. However, in normal operation, the plunger 22 is continuously reciprocated, so that a predetermined stroke corresponding to the movement stroke thereof is obtained. A volume of fuel is continuously drawn and pumped.

The fuel pressure regulator 50 includes the injector 4
Is an inlet control type regulator that adjusts the fuel pressure (fuel pressure) upstream of the inflow passage 5 as shown in FIG.
1a, a horizontal cylinder portion 51 that defines the supply passage 52a, a vertical cylinder portion 52 that defines the supply passage 52a, etc. are molded from a resin material, a regulator main body 53, a mounting flange portion 54 integrally formed at the upper end portion of the regulator main body 53, and an inflow. An adjusting valve 55 arranged between the passage 51a and the supply passage 52a to open and close both passages to adjust the fuel pressure, a support bracket 56 integrally formed with the regulator body 53 as shown in FIG. Is equipped with.

As shown in FIG. 4, an inflow passage 51a is formed in the horizontal tubular portion 51, and the joint member 36 of the plunger pump 20 is fitted into the opening of the inflow passage 51a and functions as a second connecting portion. There is. In addition, the horizontal tubular portion 51 is provided with the inflow passage 51.
A check valve 57 for opening and closing a is held in a state of being biased by a spring 58 in the closing direction. The check valve 57 and the spring 58 form a part of the adjusting valve 55. An insertion hole 65 into which the protruding piece 43 of the filter 40 is inserted is formed on the lower side of the horizontal tubular portion 51.

As shown in FIG. 4, a diaphragm 59 forming a part of the adjusting valve 55 is arranged in the intersecting space of the inflow passage 51a extending in the horizontal direction and the supply passage 52a extending in the vertical direction. . The diaphragm 59 includes a diaphragm body 59a, a spring 59b, and a through hole 59.
It is formed by the cover cap 59c having c '. Then, a part of the diaphragm main body 59a comes into contact with the needle 57a of the check valve 57, and the spring 5
The check valve 57 is opened against the biasing force of No. 8.

That is, the check valve (needle 57
a) 57, spring 58, diaphragm 59,
An adjusting valve 55 that adjusts the fuel pressure in the supply passage 52a and the inflow passage 51a is configured. The operation of the adjusting valve 55 will be described. When the pressure in the supply passage 52a or the diaphragm chamber 55a is equal to or higher than a predetermined pressure, the check valve 57 closes the inflow passage 51a by the urging force of the spring 58.

In this state, when the fuel pressure in the supply passage 52a falls below a predetermined level, the spring 59b.
The diaphragm 59 is actuated by the biasing force of the needle 5
7a is pressed to open the check valve 57. As a result, the fuel on the upstream side of the inflow passage 51a flows into the diaphragm chamber 55a and is guided to the supply passage 52a.
Then, when the pressure of the fuel in the supply passage 52a becomes equal to or higher than a predetermined level, the diaphragm 59 is actuated by the pressure and the check valve 57 is closed.

A connection portion 60 for connecting the connector of the supply pipe 5 is formed at the upper end of the supply passage 52a.
A connector 61 for electrical connection, in which the terminal 61a is exposed in the internal space, is formed on the side portion thereof, and a male-type electric connector 62 protruding horizontally in the lower side of the mounting flange portion 54 is formed. .

The electrical connector 62 has a female terminal 62a connected from the terminal 61a through an electrical wiring 61b embedded in the regulator body 51, and is fitted into the electrical connector 39 of the plunger pump 20. , Terminal 26
a is joined to the female terminal 62a.

As shown in FIG. 5, the regulator main body 53
A passage 63 and a damper chamber 64, which communicate with the supply passage 52a, are formed therein. The damper chamber 64 accommodates a pulsation damper 70 for absorbing and damping fuel pulsation (pressure fluctuation). The pulsation damper 70 is an elastically deformable hollow body, has a support 71 that forms a lattice-like framework inside, and a rubber deformation film 72 is attached to the outside of the support 71.

Therefore, when the fuel in the supply passage 52a pulsates (pressure fluctuation), the damper chamber 6
4 fluctuates, and the deformation film 72
The volume occupied (delimited) by increases or decreases. As a result, the pulsation generated in the fuel is efficiently absorbed and attenuated.

Here, the extending direction L2 of the supply passage 52a.
Since the expansion direction L3 of the damper chamber 64 (pulsation damper 70) is substantially parallel to each other, both can be brought close to each other and integrated, which contributes to narrowing the device width and downsizing. is doing.

The support bracket 56 is shown in FIGS.
As shown in FIG.
Two are formed so as to extend to face each other. The flexible piece 5 defined by the U-shaped notch
6a is formed, and a hook 5 that faces inward is formed at the tip of the 6a.
6a 'is formed. The inner wall width W1 of the two support brackets 56 is formed to be substantially equal to the outer wall width W2 of the two engagement pieces 28a formed on the bracket 28. Then, the engagement piece 28a is attached to the support bracket 56.
When it is inserted inside, the flexible piece 56a is pushed outward and bends, and when the hook 56a 'enters the hook hole 28b, the two are securely connected by snap fit.

That is, since the engaging pieces 28a of the plunger pump 20 are pushed in to connect the two by a simple one-touch operation, no special connecting parts such as fastening screws are required, and the structure is simplified, downsized, and lightweight. You can do things like
To separate the two, it is sufficient to perform a simple operation of expanding the flexible piece 56a to the outside and detaching the hook 56a 'from the hook hole 28b.

As for the assembly of the plunger pump 20 and the fuel pressure regulator 50, first, the filter 40 is assembled to the plunger pump 20, as shown in FIG. continue,
Horizontal direction H1 perpendicular to reciprocating direction L1 and extending direction L2
In the above, both are brought close to each other to fit the female electric connector 39 as the first connecting portion and the male electric connector 62, and the male joint member 36 as the second connecting portion and the female horizontal cylindrical portion. 51 is fitted. At this time, the protruding piece 43
And insert it into the insertion hole 65. Further, the flexible piece 56a (hook claw 56a ') of the support bracket 56 is hooked in the hooking hole 28b of the engaging piece 28a to perform snap-fit connection.

Here, the electrical connector 39 and the joint member 3
When the interval (pitch) of 6 and the interval (pitch) of the electrical connector 62 and the horizontal tubular portion 51 do not match, particularly when the former pitch is large, the deformation amount of the wave washer 30 as the adjusting means. It is possible to easily assemble by appropriately adjusting and adjusting the pitch. Further, since the projecting piece 43 of the filter 40 is inserted into the insertion hole 65 in a state where both are assembled, even if the coupling force of the fitting tubular portion 42 is weakened, the plunger pump 20 It is possible to prevent the filter 40 from falling off. Therefore, the fuel supply device 10 can be handled as a module product in which the filter 40 is also incorporated without using a special fastening component such as a fastening screw.

Further, in the state where the plunger pump 20 and the fuel pressure regulator 50 are connected, the reciprocating direction L1 of the plunger 22 and the extending direction L2 of the supply passage 52a are formed to be substantially parallel to each other. That is, the plunger pump 20 itself has an elongated contour in the reciprocating direction L1 of the plunger 22, and the fuel pressure regulator 50
Means that the regulator body 53 itself is elongated in the extending direction of the supply passage 52a, so that both directions L1, L
By making 2 substantially parallel, the component parts can be integrated in the central portion and the contour can be formed to have a narrow width.
It is possible to reduce the width and size.

Further, the plunger pump 20 is placed vertically, the suction port 32a 'and the filter 40 are arranged at the lower end portion thereof, the discharge port 36a' is provided on the side surface near the lower end portion, and the inflow passage 51a communicating with the discharge port 36a 'is provided. Is formed horizontally, and the adjusting valve 5 is provided in the intersection region of the inflow passage 51a and the supply passage 52a.
By arranging 5, the height (height) of the device is ensured while surely assuring the function of sucking and pumping fuel and adjusting the pressure.
By making H as low as possible, the fuel supply device 10 as a module product can be finished compactly.

Further, as a connecting portion for connecting the plunger pump 20 and the fuel pressure regulator 50, the first connecting portion also serves as the electric connectors 39, 62 for connecting electric wiring, and
Since the second connecting portion also serves as a communication passage that connects the discharge port 36a 'and the inflow passage 51a, the structure can be simplified as compared with the case where the connecting portion is provided separately. Furthermore, by adopting a snap fit connection as the connecting portion, the first
Compared to the case where only the connecting portion and the second connecting portion are used, the both can be more firmly connected.

FIG. 8 shows another embodiment in which the mounting position of the pulsation damper 70 is changed. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, as shown in FIG. 8, the passage 63 ′ that communicates with the damper chamber 64 is upstream rather than downstream of the regulating valve 55, that is, the inflow passage 5
It is formed so as to communicate with 1a.

Therefore, when the fuel in the inflow passage 51a undergoes pulsation (pressure fluctuation), the damper chamber 6 is accompanied.
4 fluctuates, and the deformable film 72 changes according to the fluctuating pressure.
The volume occupied (delimited) by increases or decreases. As a result, the pulsation generated in the fuel is more effectively absorbed and attenuated as compared with the case shown in FIG.

In the above embodiment, the case where the fuel supply device 10 of the present invention is installed in the fuel tank 1 of a two-wheeled vehicle has been shown, but the present invention is not limited to this, and other vehicles such as a three-wheeled vehicle or a four-wheeled vehicle. Vehicles equipped with small displacement engines and relatively small fuel tanks, such as carts for cars, lawn mowers, general-purpose engines such as generators, ships such as leisure boats, and even snowmobiles. If so, it can be preferably applied.

[0042]

As described above, according to the fuel supply system of the present invention, the plunger pump having the plunger for linearly reciprocating to suck and pump the fuel is connected to the discharge port thereof. A fuel pressure regulator that adjusts the pressure when supplying fuel to the injector is integrated and modularized, so it is compact as a whole, especially installed in a small fuel tank such as a motorcycle It is possible to provide a fuel supply device suitable for this. In particular, by forming the reciprocating direction of the plunger and the extending direction of the supply passage of the fuel pressure regulator to be substantially parallel to each other, both can be efficiently integrated, and the entire device can be made smaller (compact).

Further, by disposing the filter on the lower side of the device, the pump main body and the regulator main body in the middle, and the mounting flange portion on the upper side, it is only necessary to fix the mounting flange portion to the wall surface of the fuel tank, It can be installed easily and can be handled as a module product including a filter. Further, the pump main body of the plunger pump and the regulator main body of the fuel pressure regulator can be connected by the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion have the functions of electrical connection and communication passage, respectively. As a result, the assembling can be facilitated and made solid, and the structure can be simplified as compared with the case of separately providing the one having only the function as the connecting portion. Also, by adopting a snap-fit connection, both can be more firmly connected with a simple one-touch operation, and no special connecting parts such as fastening screws are required, which simplifies the structure, reduces the size, and reduces the weight. Can be done. Further, the first connecting portion and the second
By adopting the adjusting means capable of adjusting the distance between the connecting portions, the both can be easily assembled even if the pitch shift occurs.

[Brief description of drawings]

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

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

FIG. 3 is a plan view of a fuel supply device according to the present invention.

FIG. 4 is a vertical sectional view of a fuel supply device according to the present invention.

FIG. 5 is a vertical sectional view showing a part of a fuel pressure regulator.

FIG. 6 is an exploded view showing a disassembled state before connecting the plunger pump and the fuel pressure regulator.

FIG. 7 is a partially enlarged perspective view showing a snap fit connection.

FIG. 8 is a vertical cross-sectional view showing another embodiment of the mounting position of the pulsation damper.

[Explanation of symbols]

1 fuel tank 2 engine 4 injectors 5 supply pipes 10 Fuel supply device 20 Plunger pump 22 Plunger 23 Upper core (Pump body) 24 Lower core (Pump body) 26 electromagnetic coil 26a terminal (electrical wiring) 27 Outer case (Pump body) 28 bracket 28a engagement piece 28a 'Hook hole (snap fit) 30 Wave washers (adjusting means) 31,35 coil spring 32a 'suction port 33,37 Check valve 36 Joint member (second connecting portion) 36a 'outlet 39 Electric connector (first connecting part) 40 filters 43 protruding piece 50 Fuel pressure regulator 51 Horizontal cylinder part (second connecting part) 51a Inflow passage 52 Vertical tube 52a supply passage 53 Regulator body 54 Mounting flange 55 Regulator valve 56 support bracket 56a Flexible piece (snap fit) 57 check valve 58 spring 59 diaphragm 62 electrical connector (first connecting portion) 63,63 'passage 64 damper room 65 insertion holes 70 Pulsation damper 71 Support 72 Deformation membrane Reciprocating direction of L1 plunger L2 supply passage extension direction H1 Reciprocating direction and direction perpendicular to extension direction

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02M 37/08 F02M 37/08 J 69/00 340 69/00 340T (72) Inventor Junichiro Takahashi 2480 Kuno, Odawara-shi, Kanagawa Mikuni Odawara Office

Claims (7)

[Claims] 1. A fuel supply device installed in a fuel tank for supplying fuel to an injector of an internal combustion engine, the pump main body defining an intake port and a discharge port, and linearly reciprocating in the pump main body. A plunger for moving and sucking and pumping fuel, a positive displacement plunger pump including an electromagnetic coil for driving the plunger, and a supply passage for supplying fuel to an inflow passage and an injector communicating with the discharge port. A fuel pressure regulator including a regulator valve disposed between the inflow passage and the supply passage to adjust the pressure of fuel, and the pump body and the regulator body are integrally coupled. A fuel supply device characterized in that 2. The fuel supply device according to claim 1, wherein the reciprocating direction of the plunger and the extending direction of the supply passage are formed substantially parallel to each other. 3. The regulator body has a mounting flange portion formed on the upper side in the extending direction so as to be attached to a fuel tank, and the pump body is formed on the lower side in the reciprocating direction. The fuel supply apparatus according to claim 2, further comprising a mouth and a filter mounted around the inlet. 4. The fuel supply according to claim 1, wherein the regulator body is provided with a pulsation damper that communicates with the supply passage and absorbs fuel pulsation. apparatus. 5. The pump main body and the regulator main body have a first connecting portion and a second connecting portion that are detachably formed in a direction substantially perpendicular to the reciprocating direction and the extending direction, and the first connecting portion. Is also an electrical connector that connects the electrical wiring provided in the regulator body and the electrical wiring of the electromagnetic coil, the second connecting portion also serves as a communication passage that communicates the discharge port and the inflow passage, The fuel supply device according to claim 3 or 4, characterized in that. 6. The fuel supply device according to claim 5, wherein the pump main body and the regulator main body are detachably coupled by a snap fit. 7. The fuel supply device according to claim 5, wherein the pump body has an adjusting unit that can adjust a distance between the first connecting portion and the second connecting portion.