JP2007170257A - Fuel supply structure in multiple throttle body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide fuel supply structure, in which the sizes of a fuel distribution pipe and a T-type fuel joint are reduced, and an opening position of a fuel introducing passage of the T-type fuel joint is formed at a fixed position. <P>SOLUTION: One end side of a cylinder part 2 of the T-type fuel joint 1 is provided with a first insertion/connection part 5 having a first seal ring groove 9, the other end side thereof is provided with a second insertion/connection part 6 having a second seal ring groove 10, and outer circumferences of the one end side and the other end side of the cylinder part 2 are respectively provided with a first positioning projection part 7 and a second positioning projection part 8 which are symmetrical and different in shape. A first insertion hole 13 is opened to an opposed face 11a of the first fuel distribution pipe 11, a first positioning recess groove 14 and a second positioning recess groove 15 are formed in the opposed face 11a. A second insertion hole 22 is opened to an opposed face 20a of the second fuel distribution pipe 20, and a first positioning recess groove 23 and a second positioning recess groove 24 are formed in the opposed face 20a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, fuel boosted by a fuel pump is supplied to a fuel distribution pipe fixed to a throttle body, and controlled fuel is injected into an intake passage of the throttle body from a fuel injection valve attached to the fuel distribution pipe. Regarding the fuel injection device to be supplied, among them, in particular, a plurality of throttle bodies are arranged on the side, and T-type fuel joints are inserted and arranged between the opposing surfaces of the fuel distribution pipes attached to the adjacent throttle bodies, The present invention relates to a fuel supply structure in a multiple throttle body that supplies fuel supplied from a fuel introduction path of a T-type fuel joint toward an internal fuel supply path to each fuel distribution pipe.

A fuel supply structure in a conventional multiple throttle body is shown in FIG.
Referring to the drawing, T1 is one throttle body having an intake passage 50 formed therethrough, and the intake passage 50 is a first throttle valve shaft 51 rotatably supported by one throttle body T1. It is opened and closed by a first throttle valve 52 that is screwed onto the first throttle valve 52.
J is a fuel injection valve sandwiched between one throttle body T1 and a first fuel distribution pipe 53 fixed to the first throttle body T1, and the tip portion Ja of the fuel injection valve J is one throttle body. A rear end guide drilled in T1 and inserted into a front end guide hole 54 opening toward the intake passage 50, and a rear end portion Jb formed in the first fuel distribution pipe 53 and connected to the fuel distribution path 57. It is inserted into the hole 55 and clamped via the cushion member 56.
T2 is the other throttle body in which the intake passage 50 penetrates, and the intake passage 50 is screwed to the second throttle valve shaft 60 rotatably supported by the other throttle body T2. The second throttle valve 61 is opened and closed.
J is a fuel injection valve sandwiched between the other throttle body T2 and the second fuel distribution pipe 62 fixed to the other throttle body T2. The tip portion Ja of the fuel injection valve J is the other throttle body T2. The rear end portion Jb is formed in the second fuel distribution pipe 62 and is connected to the fuel distribution path 64. The rear end guide hole 63 is inserted into the front end guide hole 63 opened toward the intake passage 50. It is inserted into 65 and clamped via a cushion member 66.
Reference numeral 70 denotes a T-type fuel joint, which is configured as follows.
This will be described with reference to FIGS. FIG. 10 is a front view of the T-type fuel joint, and FIG. 11 is a right side view of FIG.
Reference numeral 71 denotes a hexagonal cylindrical portion having a regular hexagonal cross section, extending sideways, having a cylindrical shape from one end 71a toward one side (left side in the figure), and having a smaller diameter than the hexagonal cylindrical portion 71. The second insertion connecting pipe portion 73 having a diameter smaller than that of the hexagonal cylindrical portion 71 is continuously provided, and the first insertion connection is formed. A first seal ring groove 74 is formed in the tube portion 72, and a second seal ring groove 75 is formed in the second insertion connection tube portion 73.
In addition, a fuel supply path 76 penetrates from one end 72 a of the first insertion connection pipe portion 72 to the other end 73 a of the second insertion connection pipe section 73, and further, a fuel supply path 76 passes through the hexagonal cylinder portion 71. A fuel introduction path 77 is established in a row.
Next, the first fuel distribution pipe 53 will be described with reference to FIGS.
FIG. 12 is a longitudinal sectional view of a main part in the vicinity of the facing surface 53 a of the first fuel distribution pipe 53. FIG. 13 is a right side view of FIG.
58 is a positioning concave groove having a regular hexagonal cross section that is recessed from the facing surface 53a of the first fuel distribution pipe 53 toward the inside (left side in FIG. 12) on the fuel distribution path 57 side. 70 hexagonal cylinder part 71 is inserted, and it is slightly larger than hexagonal cylinder part 71 so that rotation of hexagonal cylinder part 71 is prevented.
In addition, a first insertion hole 59 into which the first connection insertion pipe portion 72 of the T-type fuel joint 70 is inserted is continuously provided from the bottom 58a of the positioning groove 58 toward the fuel distribution path 57. The diameter of the first insertion hole 59 is slightly larger than the outer diameter of the first connection insertion pipe portion 72.
A large diameter flange 53 b is formed on the outer peripheral portion of the positioning groove 58, and the diameter of the large diameter flange 53 b is larger than the diameter of the first fuel distribution pipe 53.
A positioning groove 80 having a regular hexagonal cross section is formed from the opposing surface 62a of the second fuel distribution pipe 62 toward the inside of the fuel distribution path 64, and the fuel distribution path is formed from the bottom 80a of the positioning groove 80. A second insertion hole 81 for inserting the second insertion connecting pipe 73 toward 64 is continuously provided, and a large-diameter rod having a diameter larger than the diameter of the second fuel distribution pipe 62 is formed on the outer periphery of the positioning groove 80. A portion 62b is formed. (The second fuel distribution pipe 62 is shown in FIG. 9).

The one throttle body T1 and the other throttle body T2 are arranged adjacent to each other and fixed to each other by a mounting stay 83 to form a multiple throttle body (in this embodiment, two stations). Is done.
The first fuel distribution pipe 53 is screwed and fixed above one throttle body T1 with a screw (not shown). At this time, the tip portion Ja of the fuel injection valve J is connected to one throttle body T1. The rear end Jb is inserted into the front guide hole 54 and the rear end guide hole 55 is inserted into the first fuel distribution pipe 53. In this state, the fuel injection valve J is connected to one throttle body T1 and the first fuel distribution pipe. 53 and a cushion member 56.
In addition, the second fuel distribution pipe 62 is fixed by a screw (not shown) above the other throttle body T2, and at this time, the tip portion Ja of the fuel injection valve J is connected to the other throttle body T2. While being inserted into the front end guide hole 63, the rear end portion Jb is inserted into the rear end guide hole 65 of the second fuel distribution pipe 62, and in this state, the fuel injection valve J is connected to the other throttle body T2 and the second fuel distribution pipe. 62 is sandwiched through a cushion member 66.
As described above, the first fuel distribution pipe 53 is fixedly disposed on one throttle body T1, and the second fuel distribution pipe 62 is fixedly disposed on the other throttle body T2. At this time, the first fuel distribution pipe 53 is opposed to the first fuel distribution pipe 53. The surface 53a is disposed so as to face the facing surface 62a of the second fuel distribution pipe 62, and a positioning groove 58 including a first insertion hole 59 is opened on the facing surface 53a of the first fuel distribution pipe 53. A positioning groove 80 including the second insertion hole 81 opens in the facing surface 62 a of the two fuel distribution pipe 62.

Here, the T-type fuel joint 70 is disposed between the facing surface 53 a of the first fuel distribution pipe 53 and the facing surface 62 a of the second fuel distribution pipe 62 that are disposed to face each other.
Specifically, the first insertion connecting pipe portion 72 of the T-type fuel joint 70 is inserted into the first insertion hole 59 of the first fuel distribution pipe 53, and the one end 71 a of the hexagonal cylinder portion 71 is inserted into the positioning groove 58. The second insertion connecting pipe portion 73 is inserted into the second insertion hole 81 of the second fuel distribution pipe 62 and the other end 71 b of the hexagonal cylinder portion 71 is inserted into the positioning groove 80. Note that R is a seal ring made of an O-ring, a square ring, or the like disposed in the first seal ring groove 74 and the second seal ring groove 75.
According to the above, the first insertion connecting pipe portion 72 of the T-type fuel joint 70 is inserted and disposed in the first insertion hole 59 of the first fuel distribution pipe 53 fixed to one throttle body T1, and the second insertion. Since the connecting pipe portion 73 is inserted and arranged in the second insertion hole 81 of the second fuel distribution pipe 62 fixed to the other throttle body T2, escape to the side of the T-type fuel joint 70 is suppressed, Further, the seal ring R disposed in the first seal ring groove 74 maintains the airtightness between the first insertion hole 59 and the first insertion connecting pipe portion 72, and the seal ring R disposed in the second seal ring groove 75. Thus, airtightness between the second insertion hole 81 and the second insertion connecting pipe portion 73 is maintained.
Further, one end 71 a of the hexagonal cylinder part 71 of the T-type fuel joint 70 is inserted into the positioning groove 58 of the first fuel distribution pipe 53, and the other end 71 b of the hexagonal cylinder part 71 is inserted into the positioning recess of the second fuel distribution pipe 62. By being inserted into the groove 80, the rotation of the T-type fuel joint 70 can be suppressed, and the fuel introduction path 77 can be held open in a certain direction.

  Reference numeral 84 denotes a connection for synchronously rotating the first throttle valve shaft 51 and the second throttle valve shaft 60 and adjusting the opening of the first throttle valve 52 and the second throttle valve 61 to the same opening. A tuning mechanism 85 is a throttle drum that is attached to the end of the second throttle valve shaft 60 and is operated by the driver. The first and second throttle valves 52 and 61 are operated according to the rotation of the throttle drum 85. Controls the opening and closing of each intake passage 50 synchronously.

Thus, when fuel boosted by a fuel pump (not shown) is supplied to the T-type fuel joint 70 via the fuel introduction path 77, the fuel distribution in the first fuel distribution pipe 53 via the fuel supply path 76. The fuel is supplied to the passage 57, and this fuel is controlled by the fuel injection valve J and injected into the intake passage 50 of one throttle body T1.
On the other hand, the fuel in the fuel supply passage 76 is supplied to the fuel distribution passage 64 of the second fuel distribution pipe 62, and this fuel is controlled by the fuel injection valve J and injected into the intake passage 50 of the other throttle body T2. Supplied.

Such a conventional multiple throttle body fuel supply structure has the following problems. First, a large diameter flange 53b is formed on the facing surface 53a of the first fuel distribution pipe 53, and a large diameter flange 62b is formed on the facing surface 62a of the second fuel distribution pipe 62. The outer shape of the opposing surfaces of the distribution pipes 53 and 62 cannot be reduced in size.
As shown in FIG. 14, the hexagonal cylinder part 71 of the T-type fuel joint 70 is inserted into the hexagonal positioning groove 58 of the first fuel distribution pipe 53. The rotation is blocked by the positioning groove 58.
Specifically, the rotation of one apex angle 71a forming the hexagonal cylinder portion 71 is blocked by one side 58a of the positioning groove 58 made of a hexagonal hole. In other words, it is necessary to prevent rotation of the apex angle 71a at one side 58a formed in the range of 60 degrees of the positioning groove 58.
According to the above, in order to increase the rigidity of one side 58a of the positioning groove 58, the diameter d of the large diameter flange 53b needs to be formed sufficiently larger than the positioning groove 58. If the diameter d is formed to be small, when the rotational force is applied to the hexagonal cylinder part 71, the large-diameter flange part 53b expands and deforms outward and cannot prevent the hexagonal cylinder part 71 from rotating.
This is noticeable when the fuel distribution pipe is formed of a synthetic resin material.
Further, since the hexagonal cylinder portion 71 is formed in the T-type fuel joint 70 as described above, the T-type fuel joint itself cannot be reduced in size.
Second, it is difficult to easily arrange the opening position of the fuel introduction passage 77 of the T-type fuel joint 70 in a certain direction.
This is because the hexagonal cylinder portion 71 can be inserted and arranged in any direction at intervals of 60 degrees in the positioning groove 58 formed of a hexagonal hole.

  The fuel supply structure in the multiple throttle body according to the present invention is made in view of the above-mentioned problems, and the size of each fuel distribution pipe, particularly on the opposed surface, is reduced and the shape of the T-type fuel joint is reduced. It is an object of the present invention to provide a fuel supply structure capable of opening the fuel introduction path of the T-type fuel joint to a certain position very easily and in a short time.

In order to achieve the above object, the fuel supply pipe structure in the multiple throttle body according to the present invention is fixed to one of the adjacent throttle bodies, the rear end portion of the fuel injection valve is inserted and supported, and the fuel is distributed inside. A first fuel distribution pipe having a passage formed therein;
A second fuel distribution pipe fixed to the other throttle body provided adjacently, the rear end portion of the fuel injection valve being inserted and supported, and a fuel distribution path formed therein;
A fuel supply passage extending sideways, and a fuel introduction passage connected to the fuel supply passage,
A T-type fuel joint in which a first insertion connecting pipe is formed on the outer periphery of one end of the fuel supply path, and a second insertion connecting pipe is formed on the outer periphery of the other end of the fuel supply path;
With
The first insertion connecting pipe portion of the T-type fuel joint is inserted and connected to a fuel distribution passage that opens to the opposite surface of the first fuel distribution pipe, and the second insertion connection pipe portion opens to the opposite surface of the second fuel distribution pipe. A fuel supply structure in a multiple throttle body that is inserted and connected to a fuel distribution path, and a T-type fuel joint is sandwiched between a first fuel distribution pipe and a second fuel distribution pipe,
The T-type fuel joint has a fuel supply passage 3 extending through one side of the cylindrical portion extending from the side toward the other end, and a first seal ring groove is formed in the vicinity of one end of the cylindrical portion. A second insertion connecting pipe part having a second seal ring groove formed in the vicinity of the other end of the cylindrical part is formed while the first insertion connecting pipe part is formed,
Further, a first positioning protrusion and a second positioning protrusion that are symmetrical and have different shapes on the outer periphery of the cylindrical portion on the other end side of the first seal ring groove and on the outer periphery of the cylindrical portion on the one end side of the second seal ring groove. And projecting each part,
On the other hand, a first insertion hole connected to the fuel distribution path is opened and formed in the opposing surface of the first fuel distribution pipe, and the first positioning protrusion and the first insertion hole are formed from the opposing surface toward the first insertion hole. 2 A first positioning groove and a second positioning groove having different shapes into which the positioning protrusions can be inserted are provided, and a second insertion hole connected to the fuel distribution passage is formed on the opposing surface of the second fuel distribution pipe. A first positioning groove and a second positioning groove having different shapes that can be inserted into the first positioning protrusion and the second positioning protrusion from the facing surface toward the second insertion hole. The groove is recessed,
The first insertion connecting pipe portion of the T-type fuel joint is inserted into the first insertion hole of the first fuel distribution pipe, the first positioning protrusion is inserted into the first positioning groove, and the second positioning protrusion is 2 Insert into the positioning groove, further insert the second insertion connecting pipe portion into the second insertion hole of the second fuel distribution pipe, insert the first positioning protrusion into the first positioning groove and the second positioning protrusion. The first feature is that the portion is inserted into the second positioning groove.

  In addition to the first feature of the first aspect of the present invention, the first positioning groove and the second positioning groove are provided with a slit groove and a second insertion hole from the first insertion hole toward the outer periphery of the first fuel distribution pipe. The second feature is that the slit groove is directed toward the outer periphery of the second fuel distribution pipe.

According to the first feature of the present invention, the first fuel distribution pipe is fixed to one throttle body, the first insertion connecting pipe portion of the T-type fuel joint is inserted and disposed in the first insertion hole, and the first positioning is performed. The protrusion is inserted and disposed in the first positioning groove, and the second positioning protrusion is inserted and disposed in the second positioning groove.
On the other hand, the second fuel distribution pipe is fixed to the other throttle body, the second insertion connecting pipe portion of the T-type fuel joint is inserted into the second insertion hole, and the first positioning projection is the first positioning groove. The second positioning protrusion is inserted and arranged in the second positioning groove.
According to the above, the T-type fuel joint is sandwiched between the first and second fuel distribution pipes to prevent sideward escape, and the rotation is prevented by the positioning protrusion and the positioning groove.
Since the first and second positioning grooves into which the first and second positioning protrusions formed so as to protrude symmetrically can be inserted into the outer periphery of the cylindrical portion of the T-type fuel joint, the fuel distribution pipe may be formed. The shape on the opposing surface of the fuel distribution pipe can be reduced in size.
Further, in the T-type fuel joint, since the cylindrical portion including the first and second insertion connecting pipe portions is formed, the shape of the T-type fuel joint can be reduced in size.
Furthermore, since the first and second positioning projections formed to protrude from the outer periphery of the cylindrical portion are formed symmetrically and in pairs with different shapes, the opening position of the fuel introduction path of the T-type fuel joint can be fixed easily. Open in the direction.

  According to the second feature of the present invention, since the positioning groove formed in the fuel distribution pipe is a slit groove extending from the insertion hole to the outer periphery of the fuel distribution pipe, the shape on the opposite surface of the fuel distribution pipe is further increased. Can be miniaturized.

Hereinafter, an embodiment of a fuel supply structure in a multiple throttle body according to the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an essential part of a fuel supply structure in a multiple throttle body according to the present invention.
FIG. 2 is a front view of a T-type fuel joint used in FIG. FIG. 3 is a right side view of FIG.
FIG. 4 is a longitudinal sectional view of an essential part of the first fuel distribution pipe 11 used in FIG. FIG. 5 is a right side view of FIG.
In addition, about the same structure part as FIG. 1, the description is abbreviate | omitted using the same code | symbol.
The T-type fuel joint 1 is formed by the following.
Reference numeral 2 denotes a cylindrical portion formed in a cylindrical shape toward the side. A fuel supply passage 3 is formed by penetrating from one end 2a of the cylindrical portion 2 to the other end 2b, and further above the cylindrical portion 2. A fuel introduction path 4 that continues to the fuel supply path 3 is formed.
Further, the first insertion connecting pipe portion 5 is formed on the one end 2a side of the cylindrical portion 2, and the second insertion connecting pipe portion 6 is formed on the other end 2b side of the cylindrical portion 2, and this embodiment In this case, the outer diameters of the first and second insertion connecting pipe portions 5 and 6 and the cylindrical portion 2 were made the same diameter and formed concentrically.
Further, a first positioning projection 7 and a second positioning projection 8 are formed on the outer periphery of the cylindrical portion 2 located inward from the first insertion connecting pipe portion 5 and the second insertion connecting tube portion 6. .
As shown in FIG. 3, the first positioning protrusion 7 and the second positioning protrusion 8 are formed at symmetrical positions with the fuel supply path 3 interposed therebetween, and the shapes thereof are formed differently.
Forming in a different shape means that the projecting dimensions a are different from each other, the width b is different from each other, and the cross-sectional shapes are different from each other.
The first insertion connecting pipe portion 5 is provided with a first seal ring groove 9, and the second insertion connecting pipe portion 6 is provided with a second seal ring groove 10.
According to the above, one of the first and second positioning protrusions 7 and 8 is formed so as to protrude from the first seal ring groove 9 to the outer periphery of the cylindrical portion 2 on the other end 2b side, and the other first and second positioning protrusions are formed. The protrusions 7 and 8 are formed to protrude from the second seal ring groove 10 to the outer periphery of the cylindrical portion 2 on the one end 2a side.

The first fuel distribution pipe 11 will be described with reference to FIGS. 1, 4, and 5.
A first insertion hole 13 connected to the fuel distribution path 12 is opened on the right facing surface 11 a of the first fuel distribution pipe 11, and the first positioning is further performed from the facing surface 11 a toward the first insertion hole 13. A first positioning groove 14 for inserting the protrusion 7 and a second positioning groove 15 for inserting the second positioning protrusion 8 are formed. The first and second positioning grooves 14 and 15 are clearly shown in FIG. 5 and are formed at symmetrical positions.
The second fuel distribution pipe 20 is formed by the following.
A second insertion hole 22 connected to the fuel distribution path 21 is opened on the left facing surface 20a of the second fuel distribution pipe 20, and the first positioning is further performed from the facing surface 20a toward the second insertion hole 22. A first positioning groove 23 into which the protrusion 7 is inserted and a second positioning groove 24 into which the second positioning protrusion 8 is inserted are formed. The first and second positioning grooves are formed at symmetrical positions as described above.

Then, the first fuel distribution pipe 11 is screwed and fixed to one throttle body T1 with a screw (not shown), and the second fuel distribution pipe 20 is screwed and fixed to the other throttle body T2. The fuel injection valve J is sandwiched between the first fuel distribution pipe 11 and one throttle body T1, and the other fuel injection valve J is sandwiched between the second fuel distribution pipe 20 and the other throttle body T2.
In this state, the first insertion connecting pipe portion 5 of the T-type fuel joint 1 is inserted into the first insertion hole 13 of the first fuel distribution pipe 11 and the first positioning projection 7 is the first positioning groove. 14 and the second positioning projection 8 is inserted into the second positioning groove 15.
A seal ring R formed of a rubber material is disposed between the first seal ring groove 9 and the first insertion hole 13 in a contracted manner.
The second insertion connecting pipe portion 6 of the T-type fuel joint 1 is inserted into the second insertion hole 22 of the second fuel distribution pipe 20 and the first positioning projection 7 is inserted into the first positioning groove 23. The second positioning protrusion 8 is inserted into the second positioning groove 24.
Note that a seal ring R is disposed in a contracted manner between the second seal ring groove 10 and the second insertion hole 22.
Here, when fuel boosted by a fuel pump (not shown) is supplied to the fuel introduction path 4 of the T-type fuel joint 1, the fuel is supplied to the fuel supply path 3 and the fuel distribution path of the first fuel distribution pipe 11. 12, fuel is supplied to one fuel injection valve J, and fuel is injected and supplied from the fuel injection valve J into the intake passage 50 of one throttle body T1.
On the other hand, the fuel in the fuel supply passage 3 is supplied to the other fuel injection valve J via the fuel distribution passage 21 of the second fuel distribution pipe 20, and the intake passage of the other throttle body T2 from the fuel injection valve J. Fuel is injected into 50.
In addition, since the seal ring R is disposed in a contracted manner between the first seal ring groove 9 and the first insertion hole 13 and between the second seal ring groove 10 and the second insertion hole 22, the fuel distribution path 12. , 21 does not leak to the outside.
Here, in the present invention, the first positioning projections 7 which are symmetrical with respect to the longitudinal axis of the fuel supply passage 3 and have different shapes are formed on the outer periphery of the cylindrical portion 2 of the T-type fuel joint 1. The second positioning projection 8 is formed so as to protrude, and the first positioning projection 7 is inserted into the first positioning grooves 14 and 23 and the second positioning projection 8 is arranged in the second First, the rotation of the T-type fuel joint 1 can be suppressed because it is inserted into the positioning grooves 15 and 24. Secondly, the opening position of the fuel introduction path 4 of the T-type fuel joint 1 can be easily and surely arranged toward a desired fixed position.
Thirdly, the outer shape of the fuel distribution pipes 11 and 20 can be reduced in size.
This is because, as shown in FIG. 6, the first fuel distribution pipe 11 has cylinder portions 11b and 11c (indicated by X and Y in FIG. 6) in the range of approximately 180 degrees with respect to the rotation of the positioning projections 7 and 8. ), The rotation can be prevented with high rigidity, so that the diameter z of the first fuel distribution pipe 11 can be made small.
Furthermore, the outer shape of the T-type fuel joint 1 can be reduced in size. This is because the T-type fuel joint is formed with the cylindrical portion 2 and does not have a hexagonal cylindrical portion.

FIGS. 7 and 8 show another embodiment of the first and second positioning grooves 14 and 15 formed in the fuel distribution pipes 11 and 20.
FIG. 7 is a longitudinal sectional view of a main part of the first fuel distribution pipe 11. 8 is a right side view of FIG. It is.
The first and second positioning grooves 14 and 15 according to the present embodiment are formed as slit grooves from the facing surface 11 a toward the first insertion hole 13, and the slit groove extends from the first insertion hole 13 to the fuel distribution pipe. A notch is formed toward the outer periphery of 11.
By using such a slit groove, the diameter z of the fuel distribution pipe 11 can be reduced in the vicinity of the outer diameter portions 7a, 8a of the first and second positioning projections 7, 8. Thus, the fuel distribution pipe 11 can be further reduced in size.

The principal part longitudinal cross-sectional view which shows one Example of the fuel supply structure in the multiple throttle body which becomes this invention. The front view which shows one Example of the T-type fuel joint used for FIG. The right view of FIG. The principal part longitudinal cross-sectional view of the 1st fuel distribution pipe used for FIG. The right view of FIG. The principal part cross-sectional view which requires the insertion state of the 1st, 2nd positioning groove of the 1st fuel distribution pipe in FIG. 1, and the 1st, 2nd positioning protrusion of a T-type fuel joint. The principal part longitudinal cross-sectional view which shows the other Example of the 1st, 2nd positioning ditch | groove. The right view of FIG. The principal part longitudinal cross-sectional view which shows the fuel supply structure in the conventional multiple throttle body. FIG. 10 is a front view of a T-type fuel joint used in FIG. 9. The right view of FIG. The principal part longitudinal cross-sectional view of the 1st fuel distribution pipe used in FIG. The right view of FIG. Schematic which shows the insertion state of the hexagonal cylinder part and positioning concave groove in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 T type fuel joint 2 Cylindrical part 2a One end 2b Other end 3 Fuel supply path 5 1st insertion connection pipe part 6 2nd insertion connection pipe part 7 1st positioning protrusion 8 2nd positioning protrusion 11 1st fuel distribution pipe 11a Opposing surface 12 Fuel distribution path 13 First insertion hole 14 First positioning groove 15 Second positioning groove 20 Second fuel distribution pipe 21 Fuel distribution path 22 Second insertion hole 23 First positioning groove 24 Second positioning groove

Claims (2)

A first fuel distribution pipe fixed to one of the adjacent throttle bodies, a rear end portion of the fuel injection valve inserted and supported, and a fuel distribution path formed therein;
A second fuel distribution pipe fixed to the other throttle body provided adjacently, the rear end portion of the fuel injection valve being inserted and supported, and a fuel distribution path formed therein;
A fuel supply passage extending sideways, and a fuel introduction passage connected to the fuel supply passage,
A T-type fuel joint in which a first insertion connecting pipe is formed on the outer periphery of one end of the fuel supply path, and a second insertion connecting pipe is formed on the outer periphery of the other end of the fuel supply path;
With
The first insertion connecting pipe portion of the T-type fuel joint is inserted and connected to a fuel distribution passage that opens to the opposite surface of the first fuel distribution pipe, and the second insertion connection pipe portion opens to the opposite surface of the second fuel distribution pipe. A fuel supply structure in a multiple throttle body that is inserted and connected to a fuel distribution path, and a T-type fuel joint is sandwiched between a first fuel distribution pipe and a second fuel distribution pipe,
The T-type fuel joint 1 has a fuel supply passage 3 penetrating from one end 2a of the cylindrical portion 2 extending sideways toward the other end 2b, and a first seal ring is formed in the vicinity of the one end 2a of the cylindrical portion 2. A first insertion connecting pipe portion 5 with a groove 9 is formed, and a second insertion connecting pipe portion 6 with a second seal ring groove 10 is formed in the vicinity of the other end 2 b of the cylindrical portion 2. And
Further, a first positioning protrusion that is symmetrical and has an irregular shape on the outer periphery of the cylindrical portion 2 on the other end 2b side from the first seal ring groove 9 and on the outer periphery of the cylindrical portion 2 on the one end 2a side from the second seal ring groove 10. Projecting portions 7 and second positioning projections 8 respectively,
On the other hand, a first insertion hole 13 connected to the fuel distribution path 12 is opened and formed in the facing surface 11a of the first fuel distribution pipe 11, and the first insertion hole 13 is directed from the facing surface 11a toward the first insertion hole 13. A first positioning groove 14 and a second positioning groove 15 having different shapes into which the first positioning protrusion 7 and the second positioning protrusion 8 can be inserted are provided in the opposing surface 20 a of the second fuel distribution pipe 20. The second insertion hole 22 connected to the fuel distribution path 21 is opened and drilled, and the first positioning protrusion 7 and the second positioning protrusion 8 are moved from the facing surface 20a toward the second insertion hole 22. A first positioning groove 23 and a second positioning groove 24 having different shapes that can be inserted are recessed,
The first insertion connecting pipe portion 5 of the T-type fuel joint is inserted into the first insertion hole 13 of the first fuel distribution pipe 11, and the first positioning projection 7 is inserted into the first positioning groove 14 and the second. The positioning protrusion 8 is inserted into the second positioning groove 15, the second insertion connecting pipe portion 6 is further inserted into the second insertion hole 22 of the second fuel distribution pipe 20, and the first positioning protrusion 7 is inserted into the first positioning protrusion 7. 2. A fuel supply structure in a multiple throttle body, wherein the fuel is inserted into the positioning groove 23 and the second positioning protrusion 8 is inserted into the second positioning groove 24. The first positioning groove 14 and the second positioning groove 15 are formed from the first insertion hole 13 toward the outer periphery of the first fuel distribution pipe 11 and from the second insertion hole 22 to the outer periphery of the second fuel distribution pipe 20. The fuel supply structure in the multiple throttle body according to claim 1, wherein the fuel supply structure is a slit groove toward the front.

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