JPH0932672A - Fuel supply device of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve connecting workability, disassembly workability and part exchangeability and to reduce noise caused by pump oscillation, etc., by abolishing a conduit to connect a fuel pump and a communicating part to each other. SOLUTION: This device is furnished with a fuel pump 22 to discharge fuel in a fuel tank 23 to an internal combustion engine from a fuel discharge port 10 by sucking and raising pressure of it, a communicating part 15 arranged in the middle of a fuel supply passage and a case 16 furnished with the fuel pump 22 and the communicating part 15 and arranged in the fuel tank 23. The fuel discharge port 10 of the fuel pump 22 and a fuel inflow port 1 of the communicating part 15 communicated to the fuel discharge port 10 are directly connected to each other. It is not necessary to use a conduit to connect the fuel discharge port 10 and the fuel inflow port 1 to each other and it is possible to reduce the number of connecting points and a space to install the conduit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a fuel supply system for an internal combustion engine in an automobile.

[0002]

2. Description of the Related Art In a conventional fuel supply system for an internal combustion engine, as disclosed in, for example, Japanese Patent Laid-Open No. 6-123261, the fuel in a fuel tank is sucked and boosted to generate an internal combustion engine from a fuel discharge port. A fuel pump that discharges the fuel into a fuel supply passage to the fuel supply passage, a communication component that is disposed on the way of the fuel supply passage, and a case that is equipped with the fuel pump and the communication component and that is disposed in the fuel tank. . In this publication, the fuel discharge port of the fuel pump and the fuel inlet of the communication component (fuel filter) communicating with the fuel discharge port are connected via a hose.
In addition, Japanese Patent Application No. 7-69500 previously proposed by the applicant.
No. (unpublished at the time of filing this application) describes a configuration in which a bracket is directly connected to a fuel discharge port (also referred to as a discharge port) of a fuel pump via an O-ring.

[0003]

According to the above-described conventional fuel supply device for an internal combustion engine, the fuel discharge port of the fuel pump and the fuel inlet of the fuel filter are also called hoses (conduit including hose and pipes). ) Is used for indirect connection, there are many connection points, the connection work for assembly of parts becomes complicated, and disassembly work for replacement of parts is difficult, and the pipes are also compact. There is a problem that it is difficult. Further, in the latter conventional technique, since the discharge port of the fuel pump is directly connected to the bracket via the O-ring, the discharge pulsation of the fuel pump and the vibration of the fuel pump are easily transmitted to the bracket, and there is a problem that noise is large. there were.

The present invention has been made in order to solve the above-mentioned problems, and the problem to be solved by the present invention is to eliminate the conduit for connecting the fuel pump and the communicating parts to thereby improve the connection workability. Another object of the present invention is to provide a fuel supply device for an internal combustion engine, which can improve disassembly workability and component exchangeability and can make the device compact.

[0005]

In order to solve the above-mentioned problems, the invention of claim 1 is to provide a fuel pump for sucking and boosting the fuel in a fuel tank and discharging it from a fuel discharge port to a fuel supply passage to an internal combustion engine. A fuel supply device for an internal combustion engine, comprising: a communication part arranged on the way of the fuel supply passage; and a case equipped with the fuel pump and the communication part and arranged in the fuel tank. The port is directly connected to the fuel inlet port of the communication component that communicates with the fuel discharge port. According to the fuel supply device for an internal combustion engine of the present invention, it is not necessary to use a conduit connecting the fuel discharge port of the fuel pump and the fuel inlet of the communication component, so that the number of connecting points is reduced and the space for arranging the conduit is also reduced. it can. The invention of Claim 2 is Claim 1
In the fuel supply device for an internal combustion engine as described above, the fuel discharge port of the fuel pump and the fuel inlet of the communication component directly connected to the fuel pump are directly connected to each other by the brazing joint of the receiving port and the receiving port, and the receiving port and the receiving port are It is loosely fitted, and an elastic sealing material is interposed between the fitting portion of the receiving opening and the fitting opening. The loose fitting is a fitting in which a gap exists between the fitting portions of the receiving port and the insertion port. According to the fuel supply device for an internal combustion engine of the present invention, the airtightness of the fitting portion of the socket and the socket of the brazing joint is maintained by the seal material, and the elasticity of the seal material causes the socket and socket to be connected to each other. By absorbing the relative vibration between the two, the pump vibration which is transmitted to the fuel tank side through the brazing joint is damped. According to a third aspect of the present invention, in the fuel supply device for the internal combustion engine according to the first aspect, a plurality of communication parts are arranged in the fuel supply passage,
The fuel outlet of the upstream communicating component and the fuel inlet of the downstream communicating component communicating with the fuel outlet are directly connected. According to the fuel supply device for an internal combustion engine according to the third aspect of the present invention, it is not necessary to use a conduit pipe even when connecting a plurality of communication parts, the number of connection points can be reduced, and the space for arranging the conduit pipe can be reduced. The invention of claim 4 is the invention of claim 2
In the fuel supply device for an internal combustion engine described above, at least a fuel filter is interposed between the bracket and the fuel pump, and movement of the fuel filter is restricted by the bracket. According to the fuel supply device for an internal combustion engine of the present invention, since the fuel filter is present between the fuel pump and the bracket, the pump vibration and the pump discharge pulsation are different from those in the case where the fuel pump and the bracket are directly connected and abutted. Is difficult to reach the fuel tank side.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments 1 and 2 of the present invention will be described in order. [First Embodiment of the Invention] A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a sectional view of a fuel supply system for an internal combustion engine, and FIG. 2 shows a plan view of the fuel supply system. Note that FIG. 1 shows the internal configuration in an easy-to-understand manner and does not match the actual arrangement state shown in FIG. 1 and 2, the case 16 is equipped with a fuel pump 22, a high-pressure side fuel filter 15, a pressure regulator 29, and other accessories in a case 16 and is modularized. It is attached to the tank 23. For convenience of explanation, the case 16, the fuel pump 22,
The fuel filter 15 and the pressure regulator 29 will be described in this order.

The case 16 is made of synthetic resin and has a substantially cylindrical shape with a bottom. The case 16 is provided with a substantially disc-shaped synthetic resin bracket 2 that covers the upper opening. The case 16 is formed in a stepped cylindrical shape whose diameter decreases from the upper stage to the lower stage of the upper, middle, and lower three stages, and includes an upper stage storage unit 16a, a middle stage storage unit 16b, and a lower stage storage unit 16c. Further, the wall thickness of the bracket 2 is thicker than the wall thickness of the case 16, and has sufficient rigidity to support the case 16 equipped with the various components.

The mounting structure of the bracket 2 to the case 16 will be described. A proper number (for example, three) of fitting windows 9 each having a rectangular shape are opened at the upper end of the case 16. On the other hand, on the lower surface of the bracket 2, an annular bracket case 7 that can fit in the case 16 is integrally formed. On the outer peripheral surface of the bracket case 7, holding projections 8 that can be engaged with the fitting windows 9 are formed in correspondence with the number and forming positions of the fitting windows 9. The holding projection 8 is engaged with the fitting window 9 by inserting the bracket case 7 into the case 16. For details, as the bracket case 7 is inserted into the case 16, the holding projection 8
Slides while expanding and deforming the relevant portion of the case 16 by utilizing the deflection thereof, and at the same time when the relevant portion of the case 16 is restored, the holding projection 8 and the fitting window 9 are restored. Are engaged with each other to prevent the bracket 2 and the case 16 from coming off.

The bracket 2 is attached to the fuel tank 23, and its mounting structure will be described.
A case insertion opening hole 38 through which the case 16 can be inserted is formed in the upper surface plate of the fuel tank 23, and the peripheral edge portion of the opening hole 38 is the tank flange 5. The bracket 2 is provided with the case 16 inside the fuel tank 23 and the opening 3
8 and then is mounted on the tank flange 5 via the annular packing 4 so as to close the opening 38, and the annular bracket pressing plate 3 is fastened to the tank flange 5 by, for example, a screw not shown. It is fixed to the fuel tank 23 by. In addition, this fuel tank 2
3 is mounted on a vehicle such as an automobile.

Next, the fuel pump 22 will be described. The fuel pump 22 is an in-tank type electric motor that sucks fuel from the fuel intake port 39 at the lower end of the fuel pump 23 while being immersed in the fuel in the fuel tank 23, boosts the pressure, and discharges the fuel from the fuel discharge port 10 at the upper end. A fuel pump is used. The lower portion of the fuel pump 22 is the lower storage portion 1 of the case 16.
6c is loosely fitted and is vertically housed in the center of the middle-stage housing 16c. The peripheral portion of the bottom of the fuel pump 22 including the fuel intake port 39 is exposed through an opening hole (reference numeral omitted) in the bottom plate of the case 16. A pump inlet filter 20 for filtering the fuel to be sucked is attached to the fuel suction port 39. The pump inlet filter 20 is in contact with the bottom plate 23a of the fuel tank 23. The bottom of the fuel pump 22 is elastically supported by the bottom plate of the case 16 via cushion rubber 21.
Further, the harness 36 drawn out from the upper end surface of the fuel pump 22 has a connector 3 integrally formed with the bracket 2.
5 is electrically connected to the terminal 40. A connector for wiring side connection outside the tank is connected to the connector 35.

Next, the fuel filter 15 connected to the downstream side of the fuel pump 22 will be described. The fuel filter 15 has a substantially cylindrical shape into which the fuel pump 22 is inserted in a loose fit, and the case 16 has a middle-stage storage portion 16b.
And is placed on the lower surface of the storage portion 16b. Since the fuel filter 15 is arranged on the high pressure side with respect to the pump inlet filter 20, it is also called a high pressure side fuel filter. The fuel filter 15 includes a cylindrical filter element 19, a synthetic resin filter lower body 13 having an open top surface that accommodates the element 19.
It is composed of a synthetic resin filter upper body 11 which is joined to the upper surface of the lower body 13 through a joining portion 12 formed by welding of resin to close the upper surface of the lower body. The filter lower body 13 and the filter upper body 11 form a filter case (reference numeral omitted) for housing the filter element 19.

The filter upper body 11 has an annular seal portion 24 that abuts the upper surface of the filter element 19.
have. Further, an outer cylindrical portion of the filter case forming the outer peripheral wall of the filter lower body 13 (reference numeral 17 in FIG.
Is attached) and the outer peripheral surface of the filter element 19,
Further, gaps 41 and 42 as fuel passages are provided respectively between the inner cylindrical surface of the filter case forming the inner peripheral wall of the lower body 13 (reference numeral 18 in FIG. 1) and the inner peripheral surface of the filter element 19. ing. As shown in the cross-sectional view of FIG. 3, the filter upper body 11 is provided with a substantially U-shaped filter communication passage 43. The filter communication passage 43 has a filter fuel inlet 1 communicating with the fuel discharge port 10 of the fuel pump 22 at one end and communicates with the inner gap 42 of the filter lower body 13 at the other end. The plug 44 attached to the filter upper body 11
Covers the hole 45 opened when the lateral passage of the filter communication passage 43 is formed.

The fuel discharge port 10 of the fuel pump 22 and the filter fuel inlet port 1 of the filter upper body 11
And are directly connected without using a conduit. For more information,
As shown in FIG. 3, the fuel discharge port 10 is a cylindrical outlet, the filter fuel inlet 1 is a cylindrical receiving port, and they are directly connected to each other by a brazing joint which is connected by mutual fitting. Further, the fuel discharge port 10 and the filter fuel inlet 1 are fitted in a loose fit, and an O-ring 1 as an elastic seal material is provided between the fitting portions.
4 are interposed. The O-ring 14 is installed on the upper end surface of a cylindrical spacer 46 fitted in the fuel discharge port 10. Further, a rubber cap 47 having a hole is fitted on the tip of the fuel discharge port 10.

In FIGS. 1 and 2, the lower end surface of the rod-shaped stopper 6 protruding from the lower surface of the bracket 2 is in contact with the upper surface of the fuel filter 15 which moves upward due to the discharge pressure of the fuel discharged from the fuel pump 22. The fuel filter 15 is contacted and the upward movement of the fuel filter 15 is restricted. However, when mounting the bracket 2 to the case 16, considering manufacturing errors and the like,
A gap is provided between the upper surface of the fuel filter 15 and the lower end surface of the stopper 6. Although the bracket 2 is provided with the rod-shaped stopper 6 in the figure, a projection may be provided on the inner surface of the case 16 and the fuel filter 15 may be brought into contact with the projection. Further, the filter upper body 11 is formed with a filter fuel outlet 25 which communicates with the outer gap 41 of the filter lower body 13 and is open on the upper surface.

Next, the pressure regulator 29 connected to the downstream side of the fuel filter 15 will be described. As shown in the cross-sectional view of FIG. 4, the pressure regulator 29 is joined to a metal regulator case 53 by caulking a joint end of the case 53. The internal space formed by the regulator case 53 and the holder 54 is adjusted by the diaphragm 31 interposed therebetween to adjust the pressure adjusting chamber 26.
And the atmosphere open chamber 55. A valve 56 and a spring shell 57 are attached to the center of the diaphragm 31. The valve 56 is used in the pressure regulation chamber 26.
Of the valve seat 58 on the holder 54 side due to the flexural deformation of the diaphragm 31. The valve 56 has a communication hole 59 that connects the pressure adjusting chamber 56 and the atmosphere opening chamber 55 when the valve is opened. A diaphragm spring 30 that presses the valve 56 against the valve seat 58 is interposed between the spring shell 57 and the regulator case 53. See also Regulator Case 5
At the return fuel outlet 28 opened at 3, the fuel tank 2
A return fuel conduit 27 that communicates with the internal space of 3 is connected. Sealing rings 63a and 63b are provided on the joint surface between the holder 54 and the diaphragm 31 and the joint surface between the valve 56 and the diaphragm 31, respectively, for maintaining airtightness therebetween.

The holder 54 has a pressure regulator communication passage 32 which linearly communicates in the vertical direction, and a branch passage 60 which communicates the communication passage 32 with the pressure adjusting chamber 26. A pressure regulator fuel inlet 61 is formed at the lower end of the pressure regulator communicating passage 32 of the holder 54, and a pressure regulator fuel outlet 62 is formed at the upper end of the communicating passage 32.

The pressure regulator fuel inlet port 61 of the pressure regulator 29 and the filter fuel outlet port 25 of the fuel filter 15 are directly connected without using a conduit. More specifically, as shown in FIG. 4, the pressure regulator fuel inlet 61 is a cylindrical outlet, the filter fuel outlet 25 is a cylindrical receiving end, and they are directly connected by a brazing joint which is connected by mutual fitting. . An O-ring 3 as a seal member is provided between the fitting portion of the pressure regulator fuel inlet 61 and the filter fuel outlet 25 to maintain airtightness therebetween.
4a is interposed. The pressure regulator fuel outlet 62 is connected to a main pipe 33 of the bracket 2 described later.

The pressure regulator 29 is provided with a valve 56 when the pressure of the feed fuel flowing through the pressure regulator communication passage 32 is lower than the sum of the pressure (atmospheric pressure) in the fuel tank 23 and the elastic force of the diaphragm spring 30. Is closed, and when it becomes higher than that, excess fuel is opened into the fuel tank 23 through the communication hole 59 of the valve 56, the atmosphere opening chamber 55, the return fuel outlet 28 and the return fuel conduit 27. By being returned, the fuel pressure of the fed fuel is adjusted to be always constant.

Next, the main pipe 33 of the bracket 2 connected to the downstream side of the pressure regulator 29 will be described. The main pipe 33 connects the fuel supply passages inside and outside the fuel tank 23. As shown in FIGS. 1 and 4, the main pipe 33 has a bracket fuel inlet 64 that opens to the bottom surface of the bracket 2 and a lateral side on the bracket 2. A substantially inverted L-shaped fuel passage having a line connection port 65 opening to the inside is formed. The line connection port 65 is connected to a fuel line (not shown) connected to a delivery pipe having a fuel injector attached thereto.

The bracket fuel inlet 64 of the bracket 2 and the pressure regulator fuel outlet 62 of the pressure regulator 29 are directly connected without using a conduit. More specifically, as shown in FIG. 4, the pressure regulator fuel outlet 62 is a cylindrical outlet, the bracket fuel inlet 64 is a cylindrical receiving port, and they are directly connected by a brazing joint that makes a connection by mutual fitting. . An O-ring 34b serving as a seal member is provided between the fitting portion of the pressure regulator fuel outlet 62 and the bracket fuel inlet 64 to maintain airtightness therebetween. Further, in FIG. 1, the connection between the pressure regulator 29 and the bracket 2 is accomplished at the same time as the bracket 2 is attached to the case 16. Along with this, the pressure regulator 29 is the fuel filter 15
And is held between the bracket 2 and the bracket 2.

Incidentally, as shown in FIG.
A fuel gauge sender gauge 66 is attached to the side of 6. Sender gauge 66 is float 67
And an arm 68.

In the above-described fuel supply device for an internal combustion engine, the fuel in the fuel tank 23 is sucked and boosted by the fuel pump 22 as the engine operates. The sucked fuel is filtered through the pump inlet filter 20 to remove dust in the fuel. The fuel discharged from the fuel discharge port 10 of the fuel pump 22 is filtered from the filter communication passage 43 of the fuel filter 15 through the filter element 19, so that fine dust in the fuel that cannot be removed by the pump inlet filter 20. After the pressure is removed, the pressure regulator communication passage 32 of the pressure regulator 29,
It is fed to the engine through the main pipe 33 of the bracket 2 and further through the fuel line. At this time, the pressure of the feed fuel delivered from the main pipe 33 is adjusted by the pressure regulator 29 so that it is always constant. The flow of fuel is shown by arrows in FIG.

In the above embodiment, the fuel filter 15, the pressure regulator 29, and the main pipe 33 correspond to the communicating parts in the present invention, but the pressure regulator 29 is in the fuel supply passage outside the fuel tank 23. Excludes the pressure regulator 29. The passage through which the fuel discharged from the fuel discharge port 10 of the fuel pump 22 flows is generically called the fuel supply passage.

According to the fuel supply device for an internal combustion engine, the fuel discharge port 10 of the fuel pump 22 and the filter fuel inlet 1 of the fuel filter 15 which is a communicating part communicating with the fuel discharge port 10 are directly connected to each other. Since a conduit is not used and the number of connecting points is reduced, connection workability, disassembly workability and component exchangeability are improved, and the space for handling the conduit can be reduced, so that the device can be made compact. Further, since the high-pressure side fuel filter 15 is surrounded along the side portion of the fuel pump 22, the space around the fuel pump 22 can be effectively used, and the size can be further reduced. It should be noted that due to the compact size, it can be installed in the fuel tank 23 having a shallow depth, and the amount of fuel contained in the fuel tank 23 can be increased.

Further, the fuel discharge port 1 of the fuel pump 22.
0 and the filter fuel inflow port 1 of the fuel filter 15 are directly connected by a brazing joint having a receiving port and a receiving port, the receiving port and the receiving port are fitted loosely, and the receiving port and the receiving port are fitted. Since the elastic O-ring 14 is interposed between the portions, the O-ring 14 maintains the airtightness of the fitting portion between the receiving port and the insertion port of the brazing joint. In addition, the fuel discharge port 10 of the fuel pump 22 is connected to the bracket 2 via the filter 15, and the discharge pressure of the fuel pump 22 causes the fuel filter 15 to move upward when the fuel pump 22 is in operation. The vibration of the fuel pump 22 that is transmitted to the fuel tank 22 side is damped by the fuel filter 15 interposed therebetween. Discharge pulsation is also added to the vibration when the fuel pump 22 is operating to generate vibration. However, the fuel filter 15 is interposed between the fuel pump 22 and the rod-shaped stopper 6, and the rod-shaped stopper 6 and the fuel filter 15 are separate bodies. This has a large damping effect. Further, since the case 16 for accommodating the communication parts is supported by the bracket 2 and not by one body but by another body, the vibration of the stored matter is damped. From the above, the fuel pump 22
It is possible to reduce the vehicle noise caused by the vibration of the vehicle.

Further, the plurality of communicating parts arranged along the fuel supply passage, that is, the fuel filter 15, the pressure regulator 29, and the main pipe 33 are connected to the fuel outlet 25.
And the fuel inflow port 61 and the fuel outflow port 62 and the fuel inflow port 64 are directly connected to each other, so that a conduit is not required to connect such a plurality of communication parts. In addition, the number of connection points can be reduced and the space for arranging the conduit can be reduced, which is also advantageous for improving the connection workability, the disassembly workability and the component exchangeability, and making the device compact.

[Second Embodiment of the Invention] A second embodiment of the present invention will be described with reference to FIG. 5, which is an explanatory sectional view of a fuel supply device. The second embodiment is the first embodiment of the invention.
Since a part is changed, the changed part will be described in detail, the same or substantially the same configuration as that of the first embodiment of the present invention will be denoted by the same reference numeral, and overlapping description will be omitted. . As shown in the sectional view of FIG. 5, in the second embodiment, the pressure regulator 29 in the first embodiment is eliminated. For example, there is a case where the pressure regulator 29 is provided in the fuel supply passage outside the fuel tank 23. The bracket 2 is provided with a cylindrical bracket fuel inlet 70 as an outlet, instead of the bracket fuel inlet 64 of the receiving port. The bracket fuel inlet port 70 is directly connected to the filter fuel outlet port 25 of the fuel filter 15 by a spigot joint having an O-ring 34a, as in the case of the pressure regulator fuel inlet port 61 of the pressure regulator 29 in the first embodiment. Has been done.

The present invention is not limited to the above-described embodiments of the present invention, and modifications can be made without departing from the gist of the present invention. For example, in the first embodiment in which the fuel filter 15 and the pressure regulator 29 are eliminated, the bracket fuel inlet 64 of the bracket 2 can be directly connected to the fuel discharge port 10 of the fuel pump 22. Further, the placement relationship between the receiving port and the spigot of each anchor joint may be reversed, that is, the receiving port may be used as the spigot and the spigot may be disposed as the spigot. The sealing material is not limited to the O-ring 14, but may be any material that has elasticity and performs a sealing function. It is also possible to change the brazing joint to a pipe joint such as a socket joint or a union joint. Further, the cushion rubber 21 is not limited to a material as long as it is an elastic member having elasticity.

Although the embodiments of the present invention have been described above, the embodiments of the present invention have various technical matters as described below in addition to the technical matters described in the claims. Please note. (1) In the fuel supply device for an internal combustion engine according to claim 1, a fuel filter is provided as a communicating part communicating with the fuel pump, the fuel filter is formed in a substantially cylindrical shape, and is arranged along a side portion of the fuel pump. A fuel supply device for an internal combustion engine, comprising: According to this fuel supply device, since the periphery of the fuel pump is surrounded by the fuel filter, the emission of pump noise can be prevented, and thus the soundproof effect can be expected. In addition, the fuel filter is a single part, so it is easy to replace. (2) In the fuel supply device for an internal combustion engine according to claim 2, the fuel supply device for an internal combustion engine, wherein the fuel pump is supported by the case via an elastic member having elasticity.
According to this fuel supply device, the pump vibration can be effectively damped by the elastic support by the cooperation of the elastic member and the sealing material.

[0030]

According to the fuel supply system for an internal combustion engine according to the first aspect of the present invention, since the conduit connecting the fuel pump and the communicating parts is eliminated, the number of connecting points is reduced. Exchangeability is improved and
Since the space for handling the conduit can be reduced, the device can be made compact. According to the fuel supply device for an internal combustion engine according to claim 2, a seal member for maintaining airtightness of a fitting portion of the fitting and the spigot joint which is not integral with the bracket is utilized, and the fuel tank side through the fitting. Since the pump vibration that is about to be transmitted to the pump is dampened, noise caused by the pump vibration can be reduced. Claim 3
According to the fuel supply device for an internal combustion engine described, since it is not necessary to use a conduit when connecting a plurality of communication parts,
This is also advantageous for improving connection workability, disassembly workability, component exchangeability, and downsizing of the apparatus. According to the fuel supply device for an internal combustion engine of claim 4, vibration and discharge pulsation of the fuel pump are attenuated by the fuel filter,
The pump vibration is less likely to be transmitted to the fuel tank side, which is advantageous in reducing noise caused by the pump vibration.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a fuel supply device showing a first embodiment of the present invention.

FIG. 2 is a plan view of the fuel supply device.

FIG. 3 is a cross-sectional view showing a peripheral portion of a fuel discharge port of a fuel pump.

FIG. 4 is a sectional view showing a pressure regulator.

FIG. 5 is a sectional view of a fuel supply device according to a second embodiment.

[Explanation of symbols]

 1 Filter Fuel Inlet 2 Bracket (Communication Part) 10 Fuel Discharge Port 14 O-Ring (Seal Material) 15 Fuel Filter (Communication Part) 16 Case 22 Fuel Pump 23 Fuel Tank 25 Filter Fuel Outlet 29 Pressure Regulator (Communication Part) 61 Pressure Regulator Fuel Inlet 62 Pressure Regulator Fuel Outlet 64 Bracket Fuel Inlet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Nagai 1-1-1, Kyowa-cho, Obu-shi, Aichi Aisan Industry Co., Ltd.

Claims (4)

[Claims] 1. A fuel pump for sucking fuel in a fuel tank, boosting the pressure of the fuel, and discharging the fuel from a fuel discharge port to a fuel supply passage to an internal combustion engine, a communicating part arranged on the fuel supply passage, and the fuel. A fuel supply device for an internal combustion engine, comprising: a case equipped with a pump and a communicating part and arranged in the fuel tank; a fuel discharge port of the fuel pump; and a fuel inlet of the communicating part communicating with the fuel discharge port. A fuel supply device for an internal combustion engine, which is directly connected to the. 2. The fuel supply device for an internal combustion engine according to claim 1, wherein the fuel discharge port of the fuel pump and the fuel inlet port of the communication component directly connected to the fuel pump port are directly connected by a brazing joint having a receiving port and an outlet port. A fuel supply device for an internal combustion engine, wherein the receiving port and the insertion port are fitted in a loose fit, and a sealing material having elasticity is interposed between a fitting portion between the receiving port and the insertion port. 3. The fuel supply system for an internal combustion engine according to claim 1, wherein a plurality of communication parts are arranged on the way of the fuel supply passage,
A fuel supply device for an internal combustion engine, wherein a fuel outlet of a communication component on the upstream side and a fuel inlet of a communication component on the downstream side communicated with the fuel outlet are directly connected. 4. The fuel supply device for an internal combustion engine according to claim 2, wherein at least a fuel filter is interposed between the bracket and the fuel pump, and movement of the fuel filter is restricted by the bracket. Engine fuel supply system.