CN1991161B - Fuel injection system and fuel injection valve device used in fuel injection system - Google Patents

Abstract

A fuel injection system comprising: a fuel hose; a fuel supply pipe; a fuel injection valve device equipped with a nozzle portion connected to the other end of the fuel supply pipe, provided with a The fuel is supplied to the injection port for the combustion chamber of the internal combustion engine through the connecting pipe, the intake passage communicated with the combustion chamber, and the nozzle portion is installed facing the intake passage; The fuel injection valve device includes a nozzle portion provided with an injection port, the nozzle portion is mounted on an intake pipe communicating with a combustion chamber, and a connecting pipe connected to a fuel supply having one end integrally connected with a fuel hose On the other end of the pipe, the injection port is used to supply the fuel introduced from the fuel tank via the fuel supply pipe from the connecting pipe to the combustion chamber of the internal combustion engine, and the fuel injection valve device has a protrusion provided on the end opposite to the nozzle portion. The connecting pipe has an enlarged diameter portion annularly formed on the outer peripheral surface of the connecting pipe, and the enlarged diameter portion engages with a fitting claw of the fitting when the connecting pipe is inserted and connected to the fitting of the fuel supply pipe.

Description

Fuel injection system and fuel injection valve device applicable to the fuel injection system

technical field

The present invention relates to a fuel injection system for supplying fuel to a combustion chamber of an internal combustion engine, and a fuel injection valve device suitable for the fuel injection system.

Background technique

A conventional fuel injection valve device is equipped with a nozzle portion having an injection port for injecting fuel into a combustion chamber of an internal combustion engine. At the same time, the fuel injection valve device is driven by a valve body that opens and closes the injection port, and the valve is opened and closed. The drive part of the body and the casing with built-in flow passages through which the fuel flows are constituted.

As an example of such a fuel injection valve device, a technical idea is disclosed in Patent Document 1. The technical idea is: a fuel injection valve holding device for holding a fuel outlet-side end portion attached to an engine intake port. The fuel injection valve device on the mounting hole of the passage structure body, wherein it is kept fitted to the outer periphery of the fuel inlet side end portion by a fixed retainer formed on a bracket erected from the outer surface of the aforementioned intake passage structure body The combined cap that connects the fuel hose and the fuel injection valve can reduce the number of parts and reduce the production cost with this structure.

[Patent Document 1] JP-A-2003-49740

Contents of the invention

The present invention is related to the above-mentioned technical thought, and its purpose is to provide a fuel injection system and a fuel injection valve device suitable for the fuel injection system, which can further improve the installation requirements of narrower places or the connected fuel. The characteristics of the hose improve the installation performance and maintenance performance of the fuel injection system and the fuel injection valve device applicable to the fuel injection system, while further reducing the number of components, achieving miniaturization and cost reduction.

The fuel injection system of the present invention includes: a fuel hose, a fuel supply pipe integrally connected at one end to the aforementioned fuel hose, a fuel injection valve device equipped with a nozzle portion, the nozzle The part is connected to the other end of the aforementioned fuel supply pipe, and the injection port for supplying the fuel introduced from the fuel tank through the fuel hose to the combustion chamber of the internal combustion engine through the connecting pipe is provided, and the intake passage communicated with the aforementioned combustion chamber , the aforementioned nozzle portion is installed facing the aforementioned air intake passage; it is characterized in that the aforementioned fuel supply pipe has a joint detachably connected to the aforementioned connecting pipe, and the fuel injection valve device includes a nozzle portion provided with an injection port, so The nozzle part is installed on the intake pipe communicating with the aforementioned combustion chamber, and also includes a connecting pipe connected to the other end of the fuel supply pipe whose one end is integrally connected with the fuel hose, so The injection port is for supplying the fuel introduced from the fuel tank through the fuel supply pipe through the connecting pipe to the combustion chamber of the internal combustion engine, and the fuel injection valve device has an end protrudingly provided on a side opposite to the nozzle portion. The connecting pipe on the upper part has an enlarged diameter portion formed annularly on the outer peripheral surface of the connecting pipe, and when the connecting pipe is inserted and connected to the fuel supply pipe, the enlarged diameter portion When the joint is put on, it cooperates with the matching claw of the joint.

According to this structure, in the case of supplying fuel from the fuel tank to the combustion chamber via the fuel injection valve device using the fuel supply pipe integrally connected with the fuel hose, it is possible to easily connect the fuel supply pipe to the fuel injection pipe. on the valve unit. Therefore, the installability and maintainability of the fuel supply pipe and the fuel injection valve device are improved. In addition, since the mounting structure to the intake passage of the fuel injection valve device is simplified, it is possible to reduce the number of components in the fuel injection system, achieve miniaturization, and reduce production costs.

According to this structure, when using the fuel supply pipe integrally connected with the fuel hose, the fuel supply pipe and the fuel injection valve device can be easily connected, and the installability and maintainability of the fuel injection valve device can be improved. In addition, since the mounting structure of the fuel injection valve device is simplified, the number of parts can be reduced and the size can be reduced.

In addition, in the aforementioned fuel injection system, the aforementioned fuel injection valve device is provided with a flow path for supplying the fuel flowing in via the aforementioned connecting pipe to the aforementioned injection port, and at the same time, is equipped with a The connecting pipe is provided, and the casing part of the nozzle part is provided at the other end, and a flange part is provided on the fuel supply pipe or the casing part, and at the same time, when the fuel injection valve device is connected via the flange part When fixed to the aforementioned intake pipe, the fuel injection valve device can be simply and reliably fixed to the aforementioned intake pipe. In addition, since the fuel supply pipe can be connected to such a fixed fuel injection valve device, the installability and maintainability of each component in the fuel injection system can be further improved.

Furthermore, when the aforementioned fuel hose and the aforementioned fuel supply pipe are formed of a resin material, deterioration due to fuel, heat, and the like can be largely suppressed. In addition, in the case of such a fuel hose using a resin material, the aforementioned fuel injection system can easily connect the fuel supply pipe to the fuel injection valve device because the fuel supply pipe and the connecting pipe can be easily connected. , can ensure high installation performance and maintenance performance.

Furthermore, preferably, the fuel hose and the fuel supply pipe are integrally connected by press fitting. In addition, when the fuel supply pipe and the connection pipe of the fuel injection valve device are detachably configured, the installability and maintainability of the fuel injection system can be further improved.

In addition, the aforementioned fuel injection valve device is provided with a flow path for supplying the fuel flowing in through the aforementioned connecting pipe to the aforementioned injection port, and at the same time, is equipped with a case portion that is positioned in one of the axial directions of the aforementioned flow path. The connecting pipe is provided at one end, the nozzle portion is provided at the other end, and the housing portion is provided with a flange portion for fixing the fuel injection valve device to the intake pipe, whereby further improvement can be achieved. The installability of the fuel injection valve device, therefore, is preferable.

Furthermore, if the connecting pipe and the fuel supply pipe are configured to be detachable, the mounting performance and maintenance performance of the fuel injection valve device can be further improved.

According to the present invention, the installability and maintainability of the fuel injection valve device in the fuel injection system can be improved. In addition, according to the present invention, the number of parts of the fuel injection device and the fuel injection system can be reduced, and the size and production cost can be reduced.

Description of drawings

1 is a partially cutaway longitudinal sectional view of a fuel injection system according to a first embodiment of the invention.

2A is a cross-sectional view of the fuel hose according to the foregoing embodiment, and FIG. 2B is a cross-sectional view showing a state in which the diameter of the fuel hose of the foregoing embodiment is expanded.

3 is a partially cutaway longitudinal sectional view for explaining a connecting step of the respective structural components in the fuel injection system according to the foregoing embodiment.

Fig. 4 is a sectional view taken along line IV-IV in Fig. 3 .

5 is a partially cutaway longitudinal sectional view of a fuel injection system according to a second embodiment of the invention.

6A is a plan view of the flange plate according to the aforementioned embodiment, FIG. 6B is an explanatory view showing a state in which the two aforementioned flange plates are sandwiched in the groove of the housing portion, and FIG. Explanatory diagram of the state of sandwiching the groove of the case part.

7 is a partially cutaway longitudinal perspective view of a fuel injection system according to a third embodiment of the invention.

Detailed ways

Hereinafter, regarding the fuel injection system according to the present invention, preferred embodiments related to a fuel injection valve device applicable to the fuel injection system will be listed and described in detail with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4 . 1 is a partially cutaway longitudinal sectional view of a fuel injection system 10 a according to a first embodiment of the invention.

As shown in Figure 1, the fuel injection system 10a is composed of the following parts: an intake pipe 14 forming a mounting hole 12 on the outer wall surface; a fuel injection valve device 16; a fuel supply pipe 18 connected to the fuel injection valve device 16 for supplying fuel supplied from a fuel tank not shown in the figure via a fuel hose 17 to the fuel The injection valve device 16, wherein the fuel tank stores fuel for supplying the combustion chamber of the aforementioned internal combustion engine.

In addition, the intake pipe 14 has an intake flow path 20 communicating with the combustion chamber of the aforementioned internal combustion engine, and functions as an intake passage. A throttle valve 22 that opens and closes the intake flow path 20 is pivotally supported in the intake flow path 20 .

The mounting hole 12 is formed to inject fuel from the nozzle portion 30 of the fuel injection valve device 16 into the intake flow path 20 on the downstream side of the throttle valve 22 . In addition, on the swollen outer wall surface of the intake pipe 14 on the upstream side of the mounting hole 12, a threaded portion 26 for fastening a bolt 24 described later is formed. On the other hand, a groove portion 13 is provided in an annular shape on the inner peripheral surface of the mounting hole 12 , and an O-ring, for example, is provided as a sealing member 15 in the groove portion 13 . Therefore, the sealing member 15 is in contact with the outer peripheral surface of the nozzle part 30 to prevent fuel leakage from the gap between the mounting hole 12 and the nozzle part 30 .

The fuel injection valve device 16 has a substantially cylindrical case portion 28, a cylindrical nozzle portion 30 inserted into the end portion on the mounting hole 12 side, and protrudingly provided on the end portion opposite to the nozzle portion 30. The connecting pipe 32.

The nozzle portion 30 is provided with an injection port 34 at the front end for injecting fuel into the intake flow path 20 , and has a valve body 36 inside for opening and closing the injection port 34 . The connection pipe 32 has a flow path 38 formed therein through which the fuel flowing in from the fuel supply pipe 18 flows, and an enlarged diameter annularly formed on the outer peripheral surface near the central portion in the axial direction of the connection pipe 32 . Section 40. The flow path 38 penetrates the inside of the case portion 28 and communicates with the injection port 34 of the nozzle portion 30 . Fuel is introduced into the flow path 38 from the opening 42 of the connection pipe 32 formed at the end opposite to the case portion 28 . In addition, when the connecting pipe 32 is inserted and connected to the joint 44 of the fuel supply pipe 18 described later, the enlarged diameter portion 40 cooperates with the matching claw 56 of the joint 44 to prevent the joint 44 from falling off from the connecting pipe 32. , the details of which will be described later.

Furthermore, a flange portion 48 for fixing the fuel injection valve device 16 to the intake pipe 14 is provided at the end portion of the case portion 28 on the side where the connecting pipe 32 protrudes. A bolt insertion through hole 50 is formed in the flange portion 48, and the fuel injection valve device 16 is fixed to the intake pipe 14 by screwing the bolt 24 into the threaded portion 26 through the bolt insertion through hole 50 (see FIGS. 1 and 3 ). .

In addition, an electromagnetic actuator not shown in the figure is accommodated inside the case portion 28 . This electromagnetic actuator includes, for example, a synthetic resin bobbin or the like, and drives the valve body 36 of the nozzle unit 30 to advance and retreat in the axial direction via a rod not shown in the figure. Therefore, a power supply connector 52 for supplying power to the electromagnetic actuator is attached to the case portion 28, and the power supply connector 52 is connected to a drive mechanism not shown in the figure.

The fuel supply pipe 18 is integrally connected with the fuel hose 17 and is composed of a joint 44 and a stopper 45 . The fuel hose 17 is press-fitted and integrally fitted to a stepped fuel hose insertion portion 46 formed on one end of the joint 44 . In addition, the aforementioned stopper 45 is provided at the other end portion of the joint 44 , and the joint 44 and the connecting pipe 32 of the fuel injection valve device 16 are detachably connected via the stopper 45 . The stopper 45 is provided such that its protrusion 57 fits into the hole 58 of the joint 44 so as to be able to advance and retreat in the axial direction. Also, a flow path 54 through which fuel supplied from the fuel hose 17 flows to the flow path 38 of the fuel injection valve device 16 is formed inside the fuel hose insertion portion 46 .

In addition, the fuel supply pipe 18, that is, the joint 44 and the stopper 45 may be formed of a resin material such as PA12 (polyimide 12), for example.

Also, when connecting the fuel supply pipe 18 integrally connected to the fuel hose 17 to the fuel injection valve device 16 , the connecting pipe 32 of the fuel injection valve device 16 is inserted into the joint 44 via the aforementioned stopper 45 . Inside, the enlarged diameter portion 40 of the connection pipe 32 is fitted to the fitting claw 56 of the stopper 45 . Further, at this time, the protrusion 57 formed near the central portion of the stopper 45 contacts and engages with the side surface 58 a at the hole portion 58 .

Therefore, when the fuel injection valve device 16 is connected to the fuel supply pipe 18, the stopper 45 is fixed by the cooperative action of the enlarged diameter portion 40 and the engagement claw 56, and the protrusion portion 57 and the side surface 58a of the hole portion 58, and the stopper 45 is securely fixed. The connector 44 is prevented from coming off from the connecting pipe 32 . In addition, the fuel supply pipe 18 and the connection pipe 32 are prevented from rotating by the hemispherical protrusion 60 formed on the connection pipe 32 engaging with a not-shown recess formed on the inner wall surface of the joint 44 .

In addition, when the connecting pipe 32 is inserted into the joint 44, since the outer peripheral surface near the front end of the connecting pipe 32 is in contact with the two sealing members 64 provided along the inner peripheral surface of the joint 44, it is suitable for holding the joint 44. internal liquid tightness. As such a sealing member 64, an O-ring can be used.

In addition, the fuel hose 17 is formed of a flexible resin material, and its path can be freely changed when it is disposed between the fuel tank of the internal combustion engine and the fuel injection valve device 16 .

Next, the fuel hose 17 will be described in detail with reference to FIG. 2 . 2A is a sectional view of the fuel hose 17 according to the present embodiment, and FIG. 2B shows that the fuel hose 17 is expanded in diameter before the fuel hose 17 is press-fitted to the fuel hose insertion portion 46 connected to the joint 44. Cutaway view of the state.

As shown in Figure 2A, the fuel hose 17 is formed by, for example, the following parts: a tube 17a made of PA12 (polyimide 12) with a wall thickness of 0.55mm and an inner diameter of 2.5mm, which is arranged in layers on the inner side of the tube 17a, the wall The inner tube 17b made of ETFE (tetrafluoroethylene-ethylene copolymer) with a thickness of 0.2mm, and EPDM (ethylene-propylene rubber) with a wall thickness of 1.0mm are provided to protect the tube 17a from ultraviolet rays, strong acids, and debris. Constructed protection tube 17c. In addition, when such a fuel hose 17 is press-fitted to the fuel hose insertion portion 46 of the joint 44, as shown in FIG. diameter, forming the enlarged diameter portion 66.

Since the fuel hose 17 is made of the resin material as described above, deterioration due to heat and fuel can be significantly suppressed compared with the rubber material widely used in the related art.

On the other hand, generally, a resin material is less elastic than the aforementioned rubber material. In addition, when the outer diameter of the fuel hose insertion portion 46 is formed slightly larger than the inner diameter of the fuel hose 17, for example, if the inner diameter of the tube 17a is about 2.5mm, the height of the fuel hose 17 and the fuel hose insertion portion 46 can be improved. tightness, so it is appropriate. Here, in the fuel hose 17 according to the present embodiment, by expanding the diameter of a portion having a predetermined length L from the end of the fuel hose 17 in advance to form the enlarged diameter portion 66, the fuel hose insertion portion 46 can be easily inserted. Inserting into the fuel hose 17 improves the tightness between the fuel hose 17 and the fuel hose insertion portion 46 and improves the efficiency of these connection operations.

In addition, as shown in FIG. 1 , a groove portion 68 is provided in an annular shape on the outer peripheral surface of the fuel hose insertion portion 46 , and an O-ring, for example, is disposed on the groove portion 68 as a sealing member 69 . Therefore, the tightness between the fuel hose 17 and the fuel hose insertion portion 46 is further improved, and at the same time, it is possible to prevent the fuel hose 17 from coming off from the fuel hose insertion portion 46 due to aging creep and prevent the fuel hose 17 from coming off. 17 and the fuel hose insertion part 46, etc.

Next, a procedure for connecting the fuel injection valve device 16 and the fuel supply pipe 18 to the intake pipe 14 in the fuel injection system 10a constructed as described above will be described with reference to FIG. 3 . FIG. 3 illustrates a partially cutaway longitudinal sectional view for a connecting step of various structural components in the fuel injection system 10a. In addition, in this case, the fuel hose 17 is connected in advance to the joint 44 of the fuel supply pipe 18 to form an integral body.

First, the fuel injection valve device 16 is connected to the intake pipe 14 . In this case, the nozzle portion 30 of the fuel injection valve device 16 is inserted into the mounting hole 12 of the intake pipe 14, and at the same time, the bolt 24 is fastened to the On the threaded part 26. Therefore, it is possible to easily and reliably fix the fuel injection valve device 16 to the intake pipe 14 . In addition, by directing the injection port 34 formed at the front end of the nozzle portion 30 into the intake flow passage 20 , fuel can be injected from the fuel injection valve device 16 into the intake flow passage 20 .

Next, as described above, the fuel supply pipe 18 is connected to the connecting pipe 32 of the fuel injection valve device 16 fixed on the intake pipe 14. In this case, since the fuel injection valve device 16 is fixed to the intake pipe 14 , the connecting pipe 32 can be easily and reliably inserted into the inside of the joint 44 via the stopper 45 .

In addition, at this time, the diameter-enlarged portion 40 of the connection pipe 32 is engaged with the engagement claw 56 of the stopper 45 , and the protrusion 57 is engaged with the side surface 58 a of the hole portion 58 . Therefore, since the stopper 45 is fixed to prevent the coupling 44 from coming off the connection pipe 32, the fuel injection valve device 16 and the fuel supply pipe 18 are more reliably connected.

As described above, in the fuel injection system 10a according to the present embodiment, the fuel injection valve device 16 is fixed to the intake pipe 14 to connect the joint 44 of the fuel supply pipe 18 to the fuel injection valve device 16 protrudingly provided. on the connecting pipe 32. Therefore, there is no need to provide the fixed holder used in the above-mentioned prior art structure, and the number of parts can be reduced, which can be miniaturized and the production cost can be reduced.

In addition, when the fuel hose 17 is made of a resin material, as described above, it is necessary to press the fuel hose 17 into the fuel hose insertion part 46 for connection. In two-wheeled vehicles and four-wheeled vehicles with internal combustion engines, it is not preferable to perform such a press-fitting operation from the viewpoint of work efficiency.

Therefore, in the present embodiment, the fuel hose 17 and the fuel supply pipe 18 are integrally connected in advance, and on the other hand, by fixing the fuel injection valve device 16 to the intake pipe 14, the fuel supply pipe 18 can be easily connected. Connect to the connecting pipe 32. Therefore, even when the fuel hose 17 is made of a resin material, the connection of the fuel injection system 10a can be easily performed, the working efficiency can be improved, and deterioration of the fuel hose 17 due to heat and fuel can be largely suppressed. In addition, since the fuel hose 18 can be easily attached and detached from the fuel injection valve device 16 via the joint 44, the installation performance and maintenance performance of the fuel injection valve device 16 are improved, and the piping work efficiency of the fuel supply pipe 18 is further improved. .

Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6 . FIG. 5 shows a partially cutaway longitudinal section of a fuel injection system 10 b according to a second embodiment of the invention. In addition, in Fig. 5, the reference numeral identical with the reference numeral shown in Fig. 1～Fig. , the same below.

The fuel injection valve system 10b according to the present embodiment differs from the fuel injection system 10a according to the above-described embodiment in that a fuel injection valve device 72 is provided instead of the fuel injection valve device 16 . Furthermore, the fuel injection valve device 72 is different from the fuel injection valve device 16 in that a case part 74 is provided instead of the case part 28 .

The case portion 74 is formed in a substantially cylindrical shape, and an annular groove portion 76 is formed on the outer peripheral surface of the case portion 28 in the vicinity of a portion where the flange portion 48 is provided. In addition, two flange plates 80 (see FIG. 6A ) made of thin plates having hook portions 81 and bolt insertion through holes 78 provided thereon are stacked and used in such a way that the groove portion 76 is sandwiched in the direction shown in FIG. 6B . , these bolts are inserted into the through holes 78 and fastened together with the bolts 24 , whereby the fuel injection valve device 72 is fixed to the intake pipe 14 .

In addition, one flange plate 80 may be used, and the flange plate 80 may be fixed to the groove portion 76 of the case portion 74 by bonding or welding, so that the case portion 74 and the flange plate 80 may be integrally formed.

As described above, according to the fuel injection system 10b of this embodiment, since the fuel injection valve device 72 is fixed to the intake pipe 14 via the flange plate 80, the flange portion 48 can be reduced and the shape of the fuel injection valve device 72 can be simplified. , the manufacturing cost of the fuel injection valve device 72 can be reduced. In addition, since the flange plate 80 can be separated from the case portion 74 only by loosening the bolt 24 from the threaded portion 26 a little, the maintenance performance is further improved.

Next, a third embodiment of the present invention will be described with reference to FIG. 7 . FIG. 7 is a partially cutaway longitudinal sectional view showing a fuel injection system 10c according to a third embodiment of the present invention.

The fuel injection system 10c according to this embodiment differs from the fuel injection system 10a according to the above-mentioned embodiment in that a fuel injection valve device 82 is provided instead of the fuel injection valve device 16, and at the same time, instead of the fuel supply pipe 18, a Fuel supply pipe 84. Further, the fuel injection valve device 82 is different from the fuel injection valve device 16 in that it is equipped with a substantially cylindrical case portion 86 that does not have the flange portion 48 . In addition, the fuel supply pipe 84 differs from the fuel supply pipe 18 in that a joint 90 is provided instead of the joint 44 .

A flange portion 94 having a bolt insertion through hole 92 is formed near the hole portion 58 of the joint 90 . The flange portion 94 has substantially the same shape as the flange portion 48 in the fuel injection valve device 16 described above.

Therefore, in this embodiment, after the nozzle portion 30 of the fuel injection valve device 82 is attached to the mounting hole 12 of the intake pipe 14 , when the fuel supply pipe 84 and the connection pipe 32 are connected, the bolts of the flange portion 94 The fuel supply pipe 84 and the fuel injection valve unit 82 are fixed together with the bolt 24 through the through hole 92 .

As described above, with the fuel injection system 10c according to the present embodiment, the fuel supply pipe 84 and the fuel injection valve device 82 are fixed together to the intake pipe 14 via the flange portion 94 formed on the joint 90 . Therefore, at the connection portion between the fuel supply pipe 84 and the fuel injection valve device 82, it is possible to prevent the fuel supply pipe 84 from shaking or rattling, and for example, the work of fixing the fuel hose 17 to a predetermined member of the aforementioned internal combustion engine can be omitted. wait. Furthermore, since the flange portion 48 can be reduced, the shape of the fuel injection valve device 82 can be simplified, and the manufacturing cost of the fuel injection valve device 82 can be further reduced.

As mentioned above, although this invention was demonstrated using the said embodiment, this invention is not limited to this, It goes without saying that various structures can be employ|adopted without deviating from the summary of this invention.

For example, the fuel hose 17 is not particularly limited as long as it satisfies the characteristics required for a fuel hose through which fuel such as gasoline flows. Layered structures are preferred. In addition, the material of the fuel hose 17 and the fuel supply pipes 18 and 84 is not particularly limited as long as it is a resin material, but polyimide-based resins, fluorine-based resins, and the like are preferably used.

In addition, the fuel injection valve device 16 is mounted on the intake pipe 14, however, it is not limited thereto, and the nozzle portion 30 of the fuel injection valve device 16 may be directly mounted to the combustion chamber so as to point to the intake passage leading to the above-mentioned combustion chamber. chamber cylinder head, etc.

Claims (7)

1. fuel injection system comprises:

Fuel hose,

End is connected to the fuel supply pipe on the aforementioned fuel hose integrally,

Fuel injection valve device, described fuel injection valve device is equipped with spray nozzle part, described spray nozzle part is connected on another end of aforementioned fuel supply pipe, is provided with the jetburner that will be supplied to the firing chamber of internal-combustion engine to use via connecting tube from the fuel that fuel tank process fuel hose imports

The inlet air pathway that is communicated with the previous combustion chamber,

Aforementioned spray nozzle part is installed towards aforementioned inlet air pathway ground; It is characterized in that,

Aforementioned fuel supply pipe possesses the joint that is connected with aforementioned connecting tube detachable ground,

Described fuel injection valve device comprises the spray nozzle part that is provided with jetburner, described spray nozzle part is installed on the suction tude that is communicated with the previous combustion chamber, also comprise connecting tube, described connecting tube is connected to an end and becomes on another end of a fuel supply pipe that integrally is connected with fuel hose

Described jetburner is used for the supply of fuel that is imported by described connecting tube via described fuel supply pipe from fuel tank is given the firing chamber of internal-combustion engine,

Described fuel injection valve device has the connecting tube on the outstanding end that is arranged on described spray nozzle part opposition side,

Described connecting tube has the wide diameter portion on the outer circumferential face that is formed on described connecting tube in the form of a ring,

Described wide diameter portion cooperates with the pawl that cooperates of described joint when described connecting tube is inserted into and is connected on the described joint of described fuel supply pipe.

2. fuel injection system as claimed in claim 1 is characterized in that,

Aforementioned fuel injection valve device, be provided with and give the stream of aforementioned jetburner via the supply of fuel that aforementioned connecting tube flows into, simultaneously, the housing section that aforementioned connecting tube is set, aforementioned spray nozzle part is set is equipped with on the end in the axial direction of aforementioned stream on another end

On aforementioned fuel supply pipe or aforementioned housing section, lip part is set, simultaneously, aforementioned fuel injection valve device is fixed on the aforementioned inlet air pathway via said flange portion.

3. fuel injection system as claimed in claim 1 or 2 is characterized in that,

Aforementioned fuel hose and aforementioned fuel supply pipe are made of resin material.

4. fuel injection system as claimed in claim 1 or 2 is characterized in that,

Aforementioned fuel hose and aforementioned fuel supply pipe connect into an integral body by being pressed into.

5. fuel injection system as claimed in claim 3 is characterized in that,

Aforementioned fuel hose and aforementioned fuel supply pipe connect into an integral body by being pressed into.

6. fuel injection valve device as claimed in claim 5 is characterized in that,

Aforementioned fuel injection valve device is provided with the stream that aforementioned jetburner is given in the supply of fuel that will flow into via aforementioned connecting tube, simultaneously, be equipped with housing section, this housing section is provided with aforementioned connecting tube on the end in the axial direction of aforementioned stream, aforementioned spray nozzle part is set on another end

Be provided with in aforementioned housing section aforementioned fuel injection valve device is fixed to the lip part of using on the aforementioned suction tude.

7. as claim 5 or 6 described fuel injection valve devices, it is characterized in that,

Aforementioned connecting tube and aforementioned fuel supply pipe detachable ground constitute.

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