JPH08334074A - Fuel injection device - Google Patents

Abstract

PURPOSE: To provide a fuel injection device which uses an injector of a top feed type and whose installation is easy. CONSTITUTION: A fuel injection device 10 is composed of an injector 5, a fuel delivery integrated accumulative connector block 13 and a relay connector 14. In the injector 5, a fuel connector part 2 having a fuel supply port 1 is arranged in an upper part, and an electric connector part 4 projecting in an inclined shape is arranged in a side part. The accumulative connector block 13 is provided with a fuel supply connecting part 20 to supply fuel to the fuel supply port 1 and a circuit connecting part 26 having a circuit 25 to be connected to the electric connector part 4. The device is constituted so that the connecting directions of the fuel supply connecting part 20 and the circuit connecting part 26 become the same direction. When the relay connector 14 is connected to the electric connector part 4, the connecting directions of a fuel connector part 2 and a relay circuit connecting part 34 are set in the same direction in response to the fuel supply connecting part 20 and the circuit connecting part 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection device used in automobiles and the like, and more particularly to a fuel injection device which can be easily assembled.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1 as an injector used in a fuel injection device used in an automobile, a so-called electronic fuel injection device, a fuel connector portion 2 having a fuel supply port 1 is provided on an upper portion thereof. There is a so-called top feed type injector 5 in which a fuel injection portion 3 for injecting fuel is provided in a lower portion and an electric connector portion 4 protruding in an upwardly inclined shape is provided in a side portion.

The fuel injection parts 3 of the plurality of injectors 5 are mounted at predetermined positions on the engine side, and the fuel connector parts 2 of the injectors 5 mounted on the engine side are branched in fuel delivery form. While the fuel supply connection portion is connected, each electric connector portion 4 is connected to each connection connector provided at the end portion of the wire harness, and each injector 5 is selectively supplied with power to supply each injector 5 Is selectively opened and closed to inject and supply fuel to the engine side.

[0004]

However, according to the above-mentioned conventional fuel injection device, a separate connector is connected to the electric connector portion 4 of each injector 5, and the electric wire processing around the engine becomes complicated. There was a drawback to

Therefore, in recent years, in order to facilitate electric wire treatment around the engine, a plurality of circuit connecting portions respectively connected to the electric connector portions 4 of the plurality of injectors 5 are integrally provided with a predetermined interval. Integrated connector blocks have been proposed. For example, as an integrated connector block of this type, there are those disclosed in Japanese Utility Model Publication No. 2-132844 and Japanese Utility Model Publication No. 6-29494.

However, in the structure of the fuel injection device using the integrated connector block of this type, the fuel delivery is screwed to the engine side, and the integrated connector block is provided on the engine side or the fuel delivery separately from the fuel delivery. Since it is a method of fastening screws to the side, the assembly work is troublesome and the assembly work is troublesome.

Even if the fuel delivery and the integrated connector block are integrated so that the fuel delivery and the integrated connector block do not need to be screwed to each other, the top feed type injector 5 has a fuel. Since the connection direction to the connector portion 2 and the connection direction to the electric connector portion 4 are different, there is also a problem that they cannot be connected.

In view of the above problems, it is an object of the present invention to provide a fuel injection device that uses a top feed type injector and is easy to assemble.

[0009]

As a technical means for achieving the above object, a fuel connector portion having a fuel supply port is provided on an upper portion, and an electric connector portion projecting in an inclined shape is provided on a side portion. A plurality of top-feed type injectors, a fuel supply connection part for supplying fuel to the fuel supply port of each injector, and a plurality of circuit connection parts each having a circuit connected to the electric connector part are provided, and Fuel delivery integrated type integrated connector block integrated so that each fuel supply connection part and each circuit connection part are connected in the same direction, and each fuel supply connection part and each circuit connection of the integrated connector block In order to make the connection direction of the fuel connector side and the electric connector side the same, depending on the section, It is connected to the connector unit lies in comprising a relay connection member.

Further, the relay connection member is connected to the electrical connector part of the injector, and
The structure may include a relay circuit connecting portion connected to the circuit connecting portion of the integrated connector block, and a relay circuit from the relay electric connector portion to the relay circuit connecting portion.

Further, the relay connecting member includes a relay fuel connector portion connected to the fuel connector portion of the injector and a relay fuel supply connecting portion connected to the fuel supply connecting portion of the integrated connector block, and the relay fuel is also provided. The structure may include a relay supply path extending from the connector portion to the relay fuel supply connection portion.

Further, the relay circuit includes male-male terminals insert-molded with the male terminal portions protruding on the relay electric connector portion side and the relay circuit connecting portion side, respectively.
Each male terminal portion of the male-male terminal has a female terminal portion projectingly provided on the circuit connecting portion side of the integrated connector block and a male terminal portion projectingly provided on the electric connector portion side of the injector. -The structure may be such that they are connected to each other via a female relay terminal.

Furthermore, the relay circuit is provided with female-female terminals insert-molded on the side of the electrical relay connector and on the side of the relay circuit, which are insert-molded with female terminal portions protruding, and the female terminals of the female-female terminals. The portion may be connected to the male terminal portion provided in a protruding shape on the circuit connection portion side of the integrated connector block and the male terminal portion provided in a protruding shape on the electric connector portion side of the injector.

[0014]

According to the present invention, the relay connection member is connected to the fuel connector portion or the electric connector portion of the top feed type injector so that the fuel connector portion side and the electric connector portion side are connected in the same direction, and the fuel delivery is performed. After connecting each fuel supply connection part and each circuit connection part of the integrated type integrated connector block to the fuel connector side and the electric connector side of each injector, fix only the integrated fuel delivery integrated type connector block to the engine side. The assembly work can be facilitated.

Further, the relay connecting member includes a relay electric connector portion connected to the electric connector portion of the injector and a relay circuit connecting portion connected to the circuit connector portion of the integrated connector block, and the relay electric connector portion With the structure including the relay circuit reaching the relay circuit connection portion, the circuit on the integrated connector block side and the circuit on the injector side are connected through the relay circuit of the relay connection member.

Further, the relay connection member includes a relay fuel connector portion connected to the fuel connector portion of the injector and a relay fuel supply connection portion connected to the fuel supply connection portion of the integrated connector block, and the relay fuel connector is provided. If the structure is provided with a relay supply path from the section to the relay fuel supply connection section, the fuel supply path on the integrated connector block side and the fuel supply port on the injector side are connected through the relay supply path of the relay connection member. In this case, the relay connecting member need only be formed in a bent pipe shape, and the structure of the relay connecting member can be simplified.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will now be described with reference to the drawings. In FIGS. 1 to 6, reference numeral 10 denotes a fuel injection device used in an automobile engine, a so-called electronic fuel injection device. A plurality of injectors 5 mounted on the side, a fuel delivery unit 11 for supplying fuel to each injector 5, and an integrated connector unit 12 for supplying power to each injector 5 are integrally provided. Integrated connector block 13
And a relay connector 14 as a relay connection member that relay-connects the injector 5 side and the integrated connector block 13 side.
And are provided.

The injector 5 is provided with a fuel connector portion 2 having a fuel supply port 1 at an upper portion, a fuel injection portion 3 for injecting fuel at a lower portion, and a vertical shaft of the injector 5 at a side portion. It is a so-called top feed type in which an electric connector portion 4 which is inclined 45 degrees with respect to the center and which protrudes obliquely upward is provided. The fuel connector portion 2 can be connected from above and the electric connector portion 4 can be connected from diagonally above.

Inside the injector 5, a needle valve and a solenoid for driving the needle valve are built in, and the energizing circuit of this solenoid is provided in the electric connector portion 4 in a pair of projecting male terminal portions. 6 is electrically connected. A peripheral groove 8 for mounting the O-ring 7 is formed on the upper end portion of the fuel connector portion 2.

As shown in FIGS. 4 to 6, in the integrated connector block 13, the fuel delivery section 11 and the integrated connector section 12 are arranged in parallel in an elongated shape, and the outer side of the fuel delivery section 11 is provided. A pair of mounting portions 16 on the engine side are provided so as to be separated from each other in the longitudinal direction, and these are integrally formed of a synthetic resin material or the like.

The fuel delivery section 11 has a fuel supply passage 17 and a fuel return passage 1 extending parallel to the longitudinal direction thereof.
And a fuel passage 19 having a predetermined distance in the longitudinal direction on the fuel supply passage 17 side, as shown in FIGS. 1 and 2, the fuel connector portion of the injector 5 is formed. A plurality of fuel supply connection parts 20 to which 2 is detachably connected are formed in a branched shape.

The fuel passage 19 has an inlet portion at the one end side of the fuel supply passage 17 and the fuel return passage 1.
At the outlet part of 8, the connection port 21 to the fuel tank side,
22 is formed, and the fuel supply passage 17 is provided on the other end side.
The connection port 23 of the pressure regulator is formed so as to include the outlet portion of the fuel return passage 18 and the inlet portion of the fuel return passage 18. Therefore, from the fuel tank to the fuel supply path 1
The pressure of the fuel supplied in the fuel supply passage 17 is adjusted by the pressure regulator, and the surplus is returned to the fuel tank through the fuel return passage 18.

The integrated connector section 12 has a structure shown in FIGS.
As shown in FIG. 4 and FIG. 4, a circuit 25 composed of a bus bar is inserted, and as shown in FIG. 6, on the same side as the fuel supply connection section 20 and corresponding to each fuel supply connection section 20. Then, a plurality of circuit connecting portions 26 are provided in the longitudinal direction. At this time, the connection direction to the fuel supply connection portion 20 and the connection direction to the circuit connection portion 26 are configured to be the same direction.

The circuit connecting portion 2 of the integrated connector portion 12
A single harness connection portion 27 to which a connector for a wire harness is connected is provided on the surface opposite to 6.

The bus bar ends of the circuit 25 are projected on the circuit connecting portions 26 and the harness connecting portions 27 to form male terminal portions 25a and 25b. In addition, as shown in FIGS. 1 to 3, a relay terminal accommodating portion 28 is provided on each circuit connecting portion 26 side so as to surround each male terminal portion 25 a in a separated manner, and the relay terminal accommodating portion 28. Inside, female terminals 2 at both ends
One female terminal portion 29a of the female-female relay terminal 29 having 9a is attached to the male terminal portion 25a as a connection.

At this time, elastically deformable protrusions are provided on both sides of the female-female relay terminal 29 in a protruding shape, and the female-female relay terminal 29 is provided in the relay terminal accommodating portion 28.
The protrusion is pressed into contact with the inner surface of the relay terminal accommodating portion 28, and the female-female relay terminal 29 is fixed in a retaining manner.

On the base side of the relay terminal accommodating portion 28,
A rubber ring 30 for sealing is fitted in a sleeve-like shape.

The relay connector 14 is shown in FIGS.
, It is formed in a bent shape from a synthetic resin material or the like, has one end provided with a relay electrical connector portion 33 that is detachably connected to the electrical connector portion 4 of the injector 5, and the other end thereof. A relay circuit connecting portion 34 is detachably connected to the circuit connecting portion 26 of the integrated connector block 13, and a relay circuit 35 extending from the relay electric connector portion 33 to the relay circuit connecting portion 34 is provided.

The relay circuit 35 is a relay electrical connector section 33.
Side and the relay circuit connecting portion 34 side, respectively, male terminal portion 3
A pair of male insert-molded with 6a protruding
A male terminal 36 is provided, and on the side of the relay electric connector 33,
Similar to the circuit connecting portion 26, a relay terminal accommodating portion 37 is provided so as to surround each male terminal portion 36a in a separated manner. Then, in the relay terminal accommodating portion 37, one female terminal portion 38a of the female-female relay terminal 38 having female terminal portions 38a at both ends is attached to the male terminal portion 36a in a connected state.

Similarly to the female-female relay terminal 29, the female-female relay terminal 38 is fixed in a retaining shape in the relay terminal accommodating portion 37, and a rubber seal is provided on the base side of the relay terminal accommodating portion 37. The ring 39 is fitted in a sleeve-like shape.

Further, the outer peripheral surface of the electrical connector portion 4 of the injector 5 and the relay circuit connecting portion 34 of the relay connector 14 are provided.
Locking portions 41 and 42 are provided on the outer peripheral surface, and the relay electric connector portion 33 side of the relay connector 14 and the circuit connecting portion 26 side of the integrated connector block 13 corresponding to the locking portions 41 and 42, Guide grooves 43 and 44 that relatively guide and insert the locking portions 41 and 42 and the locking portions 41,
Locked portions 45 and 46 are provided so that 42 can be engaged and disengaged.

When the relay electrical connector portion 33 of the relay connector 14 is connected to the electrical connector portion 4 of the injector 5, the relay electrical connector portion 3 is connected as shown in FIG.
The locked portion 45 of the relay connector 3 is locked to the locking portion 41 of the electrical connector portion 4 in a retaining manner, and the connection state of the relay electrical connector portion 33 of the relay connector 14 with the electrical connector portion 4 of the injector 5 is maintained. At this time, the male terminal portion 6 on the electric connector portion 4 side and the male-male terminal 36 on the relay electrical connector portion 33 side are connected via the female-female relay terminal 38.

In the connection state of the injector 5 and the relay connector 14, the connecting direction of the injector 5 to the fuel connector portion 2 and the connecting direction of the relay connector 14 to the relay circuit connecting portion 34 are the same.
In addition, the center-to-center width between the fuel supply connection portion 20 and the circuit connection portion 26 of the integrated connector block 13 and the center-to-center width between the fuel connector portion 2 and the relay circuit connection portion 34 are configured to be the same.

Then, the fuel connector portion 2 of each injector 5 in this connected state is integrated with the integrated connector block 13
The fuel supply connection portion 20 of the integrated connector block 1 and the relay circuit connection portion 34 of the relay connector 14
3 is connected to the circuit connecting portion 26, the locking portion 42 of the relay circuit connecting portion 34 is connected to the circuit connecting portion 26 as shown in FIG.
Is locked to the locked portion 46 of the relay connector 14 so that the connection state of the relay circuit connecting portion 34 of the relay connector 14 to the circuit connecting portion 26 of the integrated connector block 13 is maintained. On this occasion,
The circuit 25 on the integrated connector block 13 side and the male-male terminal 36 on the relay connector 14 side are female-female relay terminals 2
It is connected via 9.

Here, the circuit 25 on the integrated connector block 13 side and the energizing circuit of the solenoid on the injector 5 side are connected via the relay circuit 35 of the relay connector 14,
The fuel supply passage 17 on the integrated connector block 13 side and the fuel supply port 1 of each injector 5 are in communication with each other via each fuel supply connection portion 20.

In this connected state, each connecting portion is sealed by the O-ring 7, the rubber ring 30, and the rubber ring 39 as desired.

The first embodiment of the present invention is configured as described above, and by connecting the relay electric connector portion 33 of the relay connector 14 to the electric connector portion 4 of the top feed type injector 5, the injector 5 of the injector 5 is connected. Relay circuit connecting portion 34 of the fuel connector portion 2 and the relay connector 14
Fuel delivery part 1 with the same connection direction with
The fuel connector portion 2 and the relay circuit connection are connected to the fuel supply connection portion 20 and the circuit connection portion 26 which are connected in the same direction corresponding to the integrated connector block 13 in which 1 and the integrated connector portion 12 are integrated. After connecting the parts 34, only the integrated connector block 13 may be screwed to the engine side via the mounting parts 16, which facilitates the assembling work.

FIG. 7 shows a second embodiment, which has a structure in which a relay terminal accommodating portion 28 for accommodating and retaining the female-female relay terminal 29 is provided on the relay circuit connecting portion 34 side of the relay connector 14. . The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIGS. 8 and 9 show a third embodiment. The relay circuit 35 provided in the relay connector 14 has female terminal portions 35a on the relay electric connector portion 33 side and the relay circuit connecting portion 34 side, respectively. It is composed of a pair of female-female terminals insert-molded as a projecting shape.
The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Further, each female terminal portion 35a formed in a protruding shape
, And a guide cover 48 made of a synthetic resin material or the like is mounted on the relay electric connector portion 33 side and the relay circuit connection portion 34 side, respectively, and each guide cover 48 has a male terminal portion 6 on the injector 5 side and an integrated connector. A guide hole 48a for inserting and guiding the male terminal portion 25a on the block 13 side into a predetermined position of the female terminal portion 35a is formed.

Therefore, in this third embodiment, the first
It is not necessary to separately provide female-female relay terminals 29 and 38 for relay connection as in the embodiment and the second embodiment, and the structure can be simplified. Moreover, since the male terminals 6 and 25a are guided to the predetermined positions of the female terminals 35a by the guide cover 48, the injector 5 side and the integrated connector block 1 are provided.
When connecting to the 3 side, each male terminal portion 6, 25a
It is possible to effectively prevent the damage of the female terminal portion 35a due to the positional deviation of the insertion position of.

FIG. 10 shows a fourth embodiment, which differs from the first embodiment in that a relay pipe 50 is used as a relay connecting member for relay-connecting the injector 5 side and the integrated connector block 13. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

That is, the relay pipe 50 is formed in a bent pipe shape from a synthetic resin material or the like, and has a relay fuel connector portion 51 detachably fitted and connected to the fuel connector portion 2 of the injector 5 at one end thereof. A relay fuel supply connection portion 52, which is provided and is detachably fitted and connected to the fuel supply connection portion 20 of the integrated connector block 13, is provided at the other end portion, and the relay fuel supply connection portion 52 extends from the relay fuel connector portion 51. The passage leading to is configured as a relay supply passage 53.

A peripheral groove 55 for mounting the O-ring 54 is formed on the outer peripheral surface of the fitting end portion of the relay fuel supply connecting portion 52.

Then, with the relay fuel connector portion 51 of the relay pipe 50 connected to the fuel connector portion 2 of the injector 5, the connection direction of the electrical connector portion 4 of the injector 5 and the relay fuel supply connection portion 52 of the relay pipe 50. Are arranged in the same direction, and the connection direction of the integrated connector block 13 is arranged in the same direction, and the electric connector portion 4 and the relay fuel supply connection portion 52 are arranged in the same direction. It is configured to be connected.

According to the fourth embodiment, the relay pipe 50
Need only be formed into a bent pipe shape, and the structure can be simplified as compared with the case of the relay connector 14.

11 to 13 show another embodiment of the seal structure in the fourth embodiment. In FIG. 11, a rubber ring-like rubber ring having a cap shape at the fitting end of the relay fuel supply connecting portion 52 is shown. 57 is attached.

Further, in FIG. 12, the rubber ring 58 is attached to the small diameter portion 52a of the fitting end portion of the relay fuel supply connection portion 52.

Further, in FIG. 13, a rubber ring 59 is provided in the fuel supply connection portion 20 of the integrated connector block 13.
Is configured to be attached.

Although the fuel injection device 10 for the in-line four-cylinder engine is shown in this embodiment, the number of cylinders is not limited at all.

[0051]

As described above, according to the fuel injection device of the present invention, the top is provided with the fuel connector portion having the fuel supply port on the upper portion and the electric connector portion projecting in a slanted shape on the side portion. With multiple feed type injectors,
A plurality of fuel supply connection parts for supplying fuel to the fuel supply port of each injector and a plurality of circuit connection parts each having a circuit connected to the electric connector part are provided,
Fuel delivery integrated type integrated connector block integrated so that each fuel supply connection part and each circuit connection part are connected in the same direction, and each fuel supply connection part and each circuit connection of the integrated connector block In order to make the connecting directions of the fuel connector side and the electric connector side the same, corresponding to the parts, a relay connecting member connected to the fuel connector part or the electric connector part of each injector is provided. Yes, connecting a relay connection member to the fuel connector part or electric connector part of the top feed type injector so that the connection direction of the fuel connector part side and the electric connector part side is the same direction, and each of the fuel delivery integrated connector block Connect the fuel supply connection part and each circuit connection part to the fuel connector side and electric connector side of each injector. After connecting, respectively, it may be fixed to only the fuel delivery integrated integrated connector block on the engine side, there is an advantage that facilitates the assembly work can be achieved.

Further, the relay connecting member includes a relay electric connector portion connected to the electric connector portion of the injector and a relay circuit connecting portion connected to the circuit connector portion of the integrated connector block, and the relay electric connector portion is connected to the relay electric connector portion. The structure including the relay circuit reaching the relay circuit connecting portion has an advantage that the circuit on the integrated connector block side and the circuit on the injector side are connected through the relay circuit of the relay connecting member.

Further, the relay connection member includes a relay fuel connector section connected to the fuel connector section of the injector and a relay fuel supply connection section connected to the fuel supply connection section of the integrated connector block, and the relay fuel connector is also provided. If the structure is provided with the relay supply path from the section to the relay fuel supply connection section, the fuel supply path on the integrated connector block side and the fuel supply port on the injector side are connected through the relay supply path of the relay connection member. There are advantages. Further, in this case, the relay connection member only needs to be formed in a bent pipe shape, and there is an advantage that the structure of the relay connection member can be simplified.

[Brief description of drawings]

FIG. 1 is an exploded view showing a first embodiment of the present invention.

FIG. 2 is a front view of the assembled state.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a front view of an integrated connector block.

FIG. 5 is a plan view of an integrated connector block.

FIG. 6 is a bottom view of the integrated connector block.

FIG. 7 is a cross-sectional front view of essential parts showing a second embodiment.

FIG. 8 is a cross-sectional front view of essential parts showing a third embodiment.

FIG. 9 is a perspective view of the guide cover.

FIG. 10 is a cross-sectional front view of essential parts showing a fourth embodiment.

FIG. 11 is a cross-sectional view of essential parts showing a modification of the fourth embodiment.

FIG. 12 is a cross-sectional view of essential parts showing a modification of the fourth embodiment.

FIG. 13 is a cross-sectional view of an essential part showing a modified example of the fourth embodiment.

[Explanation of symbols]

 1 Fuel Supply Port 2 Fuel Connector Part 4 Electrical Connector Part 5 Injector 6 Male Terminal Part 10 Fuel Injection Device 11 Fuel Delivery Part 12 Integrated Connector Part 13 Integrated Connector Block 14 Relay Connector 20 Fuel Supply Connection Part 25 Circuit 25a Male Terminal Part 26 Circuit Connection part 29 Female-female relay terminal 33 Relay electrical connector part 34 Relay circuit connection part 35 Relay circuit 35a Female terminal part 36 Male-male terminal 36a Male terminal part 38 Female-female relay terminal 48 Guide cover 50 Relay pipe 51 Relay fuel connector Part 52 Relay fuel supply connection part 53 Relay supply path

Claims (5)

[Claims] 1. A plurality of top-feed type injectors each having a fuel connector portion having a fuel supply port on an upper portion thereof, and an electric connector portion projecting in an inclined shape on a side portion thereof, and the fuel supply port of each injector. A plurality of fuel supply connection parts for supplying fuel to the and a plurality of circuit connection parts each having a circuit connected to the electric connector part are provided,
Fuel delivery integrated type integrated connector block integrated so that each fuel supply connection part and each circuit connection part are connected in the same direction, and each fuel supply connection part and each circuit connection of the integrated connector block In order to make the connecting directions of the fuel connector side and the electric connector side the same, corresponding to the parts, a relay connection member connected to the fuel connector part or the electric connector part of each injector is provided. Characteristic fuel injection device. 2. The relay connection member includes a relay electric connector portion connected to an electric connector portion of an injector and a relay circuit connection portion connected to a circuit connection portion of an integrated connector block, and the relay electric connector portion. The fuel injection device according to claim 1, further comprising a relay circuit from the relay circuit to the relay circuit connecting portion. 3. The relay connection member includes a relay fuel connector section connected to a fuel connector section of an injector, and a relay fuel supply connection section connected to a fuel supply connection section of an integrated connector block, and the relay fuel is also provided. The fuel injection device according to claim 1, further comprising a relay supply path from the connector portion to the relay fuel supply connection portion. 4. The relay circuit includes male-male terminals insert-molded on the side of the electrical relay connector and the side of the electrical circuit connection, the male terminal portions being projecting, and the male terminal portions of the male-male terminals. Are connected to each other via a female-female relay terminal to a male terminal portion provided in a protruding shape on the circuit connecting portion side of the integrated connector block and a male terminal portion provided in a protruding shape on the electric connector portion side of the injector, respectively. The fuel injection device according to claim 2, wherein: 5. The relay circuit comprises female-female terminals insert-molded with female terminal portions projecting on the relay electric connector portion side and the relay circuit connection portion side, and the female terminal portions of the female-female terminals. Is connected to a male terminal portion provided in a protruding shape on the circuit connecting portion side of the integrated connector block and a male terminal portion provided in a protruding shape on the electric connector portion side of the injector, respectively. The fuel injection device described.