JP2001182624A - Gas fuel supply valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas fuel supply valve capable of sufficiently exhibiting performance of an engine. SOLUTION: This gas fuel supply valve is provided with a nozzle 1 for supplying gas fuel to an intake air manifold M2, a retainer 2 opposed from the valve stem (m) direction to the nozzle and a seat 3 being movably interposed in the valve stem direction between the nozzle and the retainer and contacting and separating to the nozzle. The retainer is provided with an introducing passage 22 for introducing gas fuel of an almost half from a gas supply manifold M1 to a nozzle side surface 3a of the seat via respective opening holes 32 of the seat. The nozzle is provided with an introducing passage 11 for introducing the gas fuel of a residual half to the nozzle side surface of the seat. The respective introducing passages supply the gas fuel to the intake air manifold at opening time when the seat separates from the nozzle. While the gas fuel is introduced outside in the radial direction of the seat via the introducing passage of the retainer, the gas fuel is introduced inside in the radial direction of the seat via the introducing passage of the nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrically operated gas fuel supply valve for supplying gaseous fuel from a fuel supply source to an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, such a gas fuel supply valve is disclosed in, for example, Japanese Patent No. 2771115.
There is a need for efficiently supplying gas fuel to large, multi-cylinder engines such as various compressors and generators.

[0003] Specifically, the gas fuel supply valve includes a nozzle for supplying gaseous fuel to an engine, a retainer opposed to the nozzle from the valve axial direction, and a valve axial direction between the nozzle and the retainer. And a sheet that is movably interposed and comes into contact with and separates from the nozzle. The retainer is provided with an introduction path for guiding gaseous fuel from a fuel supply source through a sheet to a nozzle side surface of the sheet. The seat is fastened to the armature that moves the seat in the valve axis direction by bolts in the valve axis direction. In the introduction path, gas fuel is supplied to the engine when the sheet is separated from the nozzle when the engine is opened, and gas fuel is not supplied to the cylinder of the engine when the sheet is in contact with the nozzle when the sheet is closed. It has been made like that. In this case, the armature (seat) is urged in the closing direction by a plurality of springs contracted between the seat and the retainer, and is attracted by the electromagnetic force of the electromagnet against the urging force of each spring to open in the opening direction. (For example, about 0.4 mm).

[0004]

However, in the above conventional gas fuel supply valve, all gas fuel supplied from the fuel supply source is guided to the side surface of the nozzle of the seat through the introduction path of the retainer. There will be issues as described.

In other words, the introduction path of the retainer has a plurality of holes extending in the radial direction about the valve shaft to guide the gaseous fuel to the nozzle side surface through the seat while avoiding interference with the plurality of springs. And grooves. For this reason, the gas fuel is supplied from the outside in the radial direction through these holes and grooves.However, due to the nature of the gas fuel, only the portion close to the outside in the radial direction of the sheet when the sheet is opened. Not supplied.

Further, since the seat is fastened to the armature by bolts on the valve shaft, the passage for introducing the retainer cannot be extended to the vicinity of the valve shaft (near the bolt). For this reason, gas fuel is concentrated and supplied from the radial outside of the sheet, and cannot be sufficiently supplied from the radial inside of the sheet.

As a result, gas fuel cannot be efficiently supplied to the cylinders of an internal combustion engine such as an engine, and the performance of the internal combustion engine cannot be sufficiently brought out.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently supply gaseous fuel to a radially inner side of a seat to sufficiently bring out the performance of an internal combustion engine. It is to provide a gas fuel supply valve that can be used.

[0009]

Means for Solving the Problems In order to achieve the above object, a solution taken by the invention according to claim 1 is that a gas fuel supply valve for supplying gas fuel from a fuel supply source to an internal combustion engine is used as an internal combustion engine. A nozzle for supplying gaseous fuel to the engine, a retainer opposed to the nozzle from the valve axis direction, and a seat interposed between the nozzle and the retainer so as to be movable in the valve axis direction, and coming and going with respect to the nozzle. Is provided. The retainer is provided with an introduction path for guiding gaseous fuel from a fuel supply source to the nozzle side surface of the sheet via the sheet, and the nozzle is provided with an introduction path for guiding gaseous fuel from the fuel supply source to the nozzle side surface of the sheet. Each introduction path is provided so that gas fuel is supplied to the internal combustion engine when the seat is separated from the nozzle when the seat is open, and gas fuel is not supplied to the internal combustion engine when the seat is closed against the nozzle. I do. Then, the gas fuel is supplied from the radial outside of the seat via the introduction path of the retainer,
The sheet is supplied from the inside in the radial direction of the sheet via the introduction path of the nozzle.

[0010] In the case of the first aspect, the gas fuel from the fuel supply source is divided into a retainer side and a nozzle side with a sheet interposed therebetween. The gas fuel divided on the retainer side of the sheet is placed on the nozzle side of the sheet via the retainer introduction path, and the gas fuel divided on the nozzle side of the sheet is placed on the nozzle side of the sheet via the nozzle introduction path. When the seat is opened, both gas fuels merge at the nozzle side and are supplied to the internal combustion engine.

In this case, since the gaseous fuel is supplied from the radial outside of the seat through the introduction passage of the retainer, the introduction passage of the retainer may be provided with a plurality of holes or the like extending radially around the valve shaft. Even if it is constituted by grooves, gas fuel supplied from the outside in the radial direction when the sheet is opened will be smoothly supplied from a portion near the outside in the radial direction of the sheet via these holes and grooves. . On the other hand, since the gas fuel is supplied from the radial inside of the seat via the nozzle introduction path, it is not necessary to extend the retainer introduction path to the vicinity of the valve shaft (near the bolt), and the gas fuel passes through the nozzle introduction path. The sheet is efficiently supplied from the inside in the radial direction of the sheet. This makes it possible to sufficiently bring out the performance of the internal combustion engine.

In addition, the gas fuel is guided to the nozzle side surface of the sheet via the retainer introduction path and the nozzle introduction path opposed to each other across the sheet, so that only the retainer introduction path is provided on the sheet. Only a hole or a groove that opens into the sheet need be formed, and the shape of the sheet becomes very simple. Therefore, the strength of the sheet is improved, and the processing cost is reduced.

According to a second aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, a retainer introduction path is opened radially outward of the sheet on the nozzle side surface of the sheet. A plurality of opening holes penetrating in the valve shaft direction are provided continuously in a circumferential direction with a long diameter on a concentric circle with the valve shaft. A groove is formed on the side surface of the nozzle corresponding to the plurality of opening holes, the groove being concentric with the valve shaft, and the groove communicates with each opening hole.

In the case of the second aspect, the gas fuel from the introduction passage of the retainer does not pass through the narrow hole, but passes through the plurality of long holes on the concentric circle with the valve shaft. Is supplied to the internal combustion engine from the outside in the radial direction of the seat in a state where it is smoothly guided into the inside, merges in the groove, and is uniformly adjusted in the circumferential direction.

Further, since a plurality of opening holes are provided so as to penetrate in the valve axis direction, the seat can be formed in a simple plate shape, and the structure of the seat can be simplified. In addition, the groove on the side surface of the nozzle of the sheet makes it possible to reduce the weight of the sheet, thereby greatly improving the responsiveness (opening / closing speed) when opening and closing the sheet.

Further, since each opening of the seat is provided continuously on a concentric circle with the valve shaft, even if the seat rotates around the valve shaft, the introduction path of the retainer is always set through the opening through the opening. Can be opened on the nozzle side surface (inside the groove).

According to a third aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, a retainer introduction path is opened radially outward of the sheet on the nozzle side surface of the sheet. A plurality of opening holes penetrating in the valve axis direction are provided continuously at predetermined intervals in the circumferential direction on a concentric circle with the valve axis. A groove is formed on the side surface of the nozzle corresponding to the plurality of opening holes, the groove being concentric with the valve shaft, and the groove communicates with each opening hole.

In the case of the third aspect, the gas fuel from the introduction path of the retainer smoothly enters the groove on the side surface of the nozzle of the seat through the plurality of opening holes continuously opening on the concentric circle with the valve shaft. After being guided and merged in the groove and uniformly adjusted in the circumferential direction, the sheet is supplied to the internal combustion engine from the radial outside of the seat.

Further, since the plurality of opening holes are provided so as to penetrate in the valve axis direction, the sheet may be a simple plate-like one as in the case of the above-described second aspect, and the structure of the sheet may be reduced. In addition to being simple, it is possible to enhance the responsiveness when opening and closing the seat. Moreover, by continuously providing each opening of the seat on the concentric circle with the valve shaft, even if the seat rotates around the valve shaft, the introduction path of the retainer always keeps the introduction path of the retainer through the opening through the nozzle side surface (in the groove). ) Can be opened.

According to a fourth aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, the seat is fastened to the movable piece for moving the seat in the valve axis direction from the valve axis direction by a bolt. I do. A through hole is provided in the nozzle introduction path so as to penetrate the nozzle in a direction orthogonal to the valve shaft, and the through hole communicates with a bolt receiving hole for receiving the head of the bolt in the nozzle. It is.

In the case of the fourth aspect, the gas fuel from the introduction path of the nozzle flows smoothly through the through hole, and is very smoothly guided from the bolt receiving hole to the radially inner side of the sheet.

Further, a bolt housing hole is used as a gas fuel supply system from the nozzle side, and the vicinity of the center of the nozzle (near the valve shaft) is effectively used.

According to a fifth aspect of the present invention, in addition to the constituent features of the first aspect, the seat is fastened to the movable piece for moving the seat in the valve axis direction by bolts from the valve axis direction. I do. A bolt portion is provided in the nozzle introduction path, one end of which is open to the fuel supply source and the other end is provided with a hole extending radially in the nozzle toward the valve shaft, and a head of the bolt is housed in the nozzle. The other end of the hole communicates with the hole.

In the case of the fifth aspect, the gas fuel from the introduction path of the nozzle is smoothly guided from one end of the hole to the inside in the radial direction of the sheet via the bolt receiving hole at the other end of the hole. become.

Further, as in the case of the above-mentioned claim 4,
By using the bolt receiving hole, the vicinity of the center of the nozzle is effectively used.

According to a sixth aspect of the present invention, in addition to the constituent features of the first aspect of the invention, a plurality of grooves concentric with the valve shaft are provided on the side surface of the nozzle seat. , On the inner side in the radial direction of the seat, are alternately communicated with the internal combustion engine side and the fuel supply source side.

In the case of the sixth aspect, the gas fuel from the introduction path of the nozzle is guided in the circumferential direction inside the groove concentric with the valve shaft on the radially inner side of the seat. To the groove (groove communicating with the internal combustion engine) concentrically adjacent to the groove (groove communicating with the internal combustion engine).

Further, a plurality of grooves which are concentric with the valve shaft on the seat side surface of the nozzle can be formed up to the vicinity of the center of the nozzle, so that the gas fuel can be efficiently guided to the radially inner side of the seat. It will be very advantageous.

According to a seventh aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, in addition to the constitutional requirements of the first aspect, the nozzle is provided on the side opposite to the seat so as to be substantially symmetrical with respect to an orthogonal line orthogonal to the valve axis. A pair of half-moon-shaped holes are recessed, and a groove is formed on a side surface of the nozzle sheet on a contact surface that comes into contact with the sheet. The groove communicates with each of the holes.

In the case of claim 7, the gas fuel guided to the side surface of the nozzle of the seat flows into the groove on the side surface of the nozzle when the seat is opened, and from the groove to the internal combustion engine through each large semi-moon-shaped hole. It will be supplied smoothly.

Further, since each hole is provided in line symmetry with respect to an orthogonal line orthogonal to the valve shaft, even if an introduction path extending in the orthogonal line direction is formed in the nozzle, such an introduction path is not required. Each hole is easily formed without interfering with the holes.

According to an eighth aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, a plurality of components extending concentrically with the valve shaft and radiating from the valve shaft on the side opposite to the seat of the nozzle. A plurality of holes defined by the radiation. Then, a groove is formed on a side surface of the sheet of the nozzle on a contact surface that comes into contact with the sheet, and the groove communicates with the plurality of holes.

In the case of the eighth aspect, the gas fuel guided to the side surface of the nozzle of the seat flows into the groove on the side surface of the nozzle of the nozzle when the seat is opened, and from the groove through the respective holes defined by the plurality of radiations, the internal combustion engine is operated. It will be supplied smoothly to the engine side.

Further, since each hole is defined by a plurality of radiations from the valve shaft, even if an introduction path extending in the radiation direction is formed in the nozzle, it does not interfere with such an introduction path. Therefore, each hole is easily formed.

According to a ninth aspect of the present invention, in addition to the constituent features of the fourth aspect of the invention, a peripheral groove is provided on the outer peripheral surface side of the nozzle, and the peripheral groove is provided with respect to the nozzle introduction path. It is a communication.

In the case of the ninth aspect, the gaseous fuel from the introduction path of the nozzle is efficiently and smoothly guided from both ends of the through hole toward the inside in the radial direction of the sheet through the peripheral groove.

According to a tenth aspect of the present invention, in addition to the constituent features of the first aspect of the present invention, a sheet receiving means for receiving a sheet at the time of opening when the sheet is separated from a nozzle is provided on a side surface of the retainer. Section is provided. And
A single urging spring that urges the nozzle in the direction of bringing the sheet into contact with the nozzle is contracted between the retainer and the sheet corresponding to each other radially inward of the sheet receiving portion, and this urging spring is The telescopic shaft is provided around the valve shaft such that the telescopic shaft is concentric with the valve shaft.

In the case of the tenth aspect, the seat is urged in the closing direction by a single urging spring without using a plurality of urging springs. Therefore, it is possible to provide a simple and low-cost urging spring without worrying about the layout of the plurality of urging springs between the retainer and the seat.

Further, since the biasing spring is provided around the valve axis so that the expansion / contraction axis is concentric with the valve axis, the introduction path of the retainer is radially outward without interference with the biasing pulling. It is possible to freely lay out on the side.

In addition, since the biasing spring is provided radially inward of the sheet receiving portion of the retainer that receives the sheet when the seat is released, the sheet receiving portion avoids interference with the biasing spring while preventing the seat from interfering with the biasing spring. As a result, the impact of the sheet abutting on the sheet receiving portion of the retainer when the sheet is released can be efficiently reduced on the radially inward side.

In the case where the sheet receiving portion is provided radially inward of the opening of the sheet as in the eleventh aspect, gaseous fuel from the introduction passage of the retainer passes through the opening of the sheet. As a result, the gaseous fuel is smoothly introduced to the nozzle side surface of the sheet, so that the gaseous fuel is efficiently guided to the outside in the radial direction of the sheet through the introduction path of the retainer.

Further, the sheet abuts on the sheet receiving portion of the retainer not radially outward of the opening hole which becomes weaker in strength but radially inward of the opening hole to more effectively reduce the impact of the sheet. , It is possible to secure its own strength.

On the other hand, as in the twelfth aspect,
A sheet receiving portion is provided with a width radially inward from an opposing position of the retainer opposing the opening of the sheet, and a gas fuel for each opening of the sheet is provided at an opposing portion opposing the opening of the sheet. When a notched groove is provided so as to enlarge the introduction path, the gas fuel from the introduction path of the retainer is positively guided to the opening of the sheet by the notch groove, and the sheet is formed through the opening. By being smoothly introduced into the nozzle side surface, the gaseous fuel is more efficiently guided to the outside in the radial direction of the seat through the introduction passage of the retainer.

According to a thirteenth aspect of the present invention, in addition to the constituent features of the second or third aspect of the present invention, retainers corresponding to each other radially inward of each of the opening holes of the seat are provided. Between the and the seat, a plurality of biasing springs for biasing the nozzle in the direction of contacting the sheet with the nozzle are compressed at predetermined circumferential intervals on a concentric circle with the valve shaft, and each of the biasing springs is Each of the telescopic shafts is provided around the valve axis so as to be parallel to the valve axis.

In the case of claim 13, each biasing spring is
Since it is provided radially inward of each opening hole of the sheet, it is possible to freely lay out the introduction path of the retainer on the radially outward side without interfering with each of the biasing pulleys, and furthermore, the sheet Gas fuel from the introduction passage of the retainer is smoothly introduced into each opening.

[0046]

Embodiments of the present invention will be described below with reference to the drawings.

<< First Embodiment >> FIG. 1 shows a gas fuel supply valve according to a first embodiment of the present invention.

In FIG. 1, a gas fuel supply valve X is a multi-cylinder engine (not shown) using gas fuel as an internal combustion engine.
A nozzle 1 for supplying gaseous fuel to the engine, a retainer 2 facing the nozzle 1 from the valve axis m direction, and moving in the valve axis m direction between the nozzle 1 and the retainer 2. And a sheet 3 that is interposed as possible and comes into contact with and separates from the nozzle 1. The gas fuel supply valve body X is formed by the nozzle 1, the retainer 2 and the seat 3.
a is constituted. The engine is used not only for trains, ships and power plants, but also for various compressors such as reciprocating air compressors and gas compressors. Hereinafter, the configuration of the gas fuel supply valve X described above will be individually described in detail.

<Housing> The housing X11 is shown in FIG.
As shown in FIG. 1, a gas fuel inlet X11a to which the downstream end of the gas supply manifold M1 is connected is provided on one side (the left side in FIG. 1). Further, the housing X11 has a gas fuel outlet X11b, which opens in the middle of an intake manifold M2 that supplies intake air to the cylinder of the engine, at a lower portion. In the housing X11, there is provided a space X11c vertically penetrating so as to communicate with the gas fuel inlet X11a and the gas fuel outlet X11b, respectively, and the gas fuel supply valve main body Xa is provided in the space X11c.
(Nozzle 1, retainer 2, and sheet 3) are accommodated.

Further, on the upper surface side of the housing X11,
Although not shown, a magnetic core having high magnetic permeability is provided. The core has the shape of a rectangular block and has a circular channel for supporting the coil. The coil is wound around the core to generate a strong magnetic field. Then, the core is disposed directly above the armature 4 as a movable piece for moving the seat 3 upward in the valve axis m direction in a state almost in contact with the armature 4, and the armature 4 is quickly attracted by a strong magnetic field, thereby The gas fuel supply valve X is opened by separating the seat 3 from the nozzle 2 and the gas fuel inlet X
11a and the gas fuel outlet X11b communicate with each other. In this case, the pressure of the gas fuel supplied to the gas fuel inlet X11a is set to P2 (> P1) higher than the pressure P1 in the middle of the intake manifold M2, and the gas fuel supply valve X is opened when the gas fuel supply valve X is opened. The gas fuel passing through X is supplied smoothly and quickly into the intake manifold M2.

<Nozzle> The nozzle 1 is formed in a disk shape as shown in FIG. 1 (see FIGS. 3 and 4), and the outer peripheral surface of the lower part thereof is connected to the gas fuel outlet X11b through an O-ring X11d. , And is mounted so as not to fall down (to the intake manifold M2 side) by a retaining ring X11e. A substantially half of the gas fuel (indicated by the dashed arrow in FIG. 1) introduced from the gas supply manifold M1 to the gas fuel inlet X11a is supplied to the nozzle 1 of the nozzle 1.
Passage 11 leading to the nozzle side surface 3a of the sheet 3 from underneath.
Is provided. This introduction path 11 is shown in FIGS.
As shown in FIG. 2, a through-hole 12 penetrates the upper part of the nozzle 1 in a direction n (a left-right direction in FIGS. 2 and 3) perpendicular to the valve axis m. One end of the through hole 12 (the left end in FIGS. 1 to 3) is connected to the gas supply manifold M1.
Is opened at the gas fuel introduction port X11a so as to oppose the above.

As shown in FIG. 3, the side 1a of the nozzle 1 which is exposed to the gas fuel outlet X11b is opposite to the seat 1a.
(The lower surface in FIGS. 1, 2 and 5) has an orthogonal line n
The meniscus holes 13, 13 are formed as a pair of substantially meniscus holes that are line-symmetric with respect to. On the other hand, as shown in FIGS. 4 and 5, the sheet 3 is provided on the side surface 1 b of the nozzle 1 (the upper surface in FIGS. 1, 2 and 5).
The annular grooves 14a, 14b, and 14c are formed at predetermined intervals from the inside in the radial direction, as grooves that are concentrically recessed with the valve shaft m on the contact surface that abuts against the valve shaft m. As shown in FIG. 6, each of the annular grooves 14 a to 14 c has a bottom formed with a communication port 13 with each of the meniscus holes 13.
a, ... are communicated.

Further, as shown in FIG. 1, FIG. 2 and FIG.
An annular groove 15 is formed between the innermost annular groove 14a and the central annular groove 14b among the annular grooves 14a to 14c. This annular groove 15
As shown in FIG. 1, the nozzle 1 is located on the contact surface of the sheet side surface 1b of the nozzle 1 contacting the sheet 3, and as shown in FIG. 1
It communicates via 2a and 12a. In this case, since the annular groove 15 is located between the innermost annular groove 14a and the central annular groove 14b on the seat side surface 1b of the nozzle 1, each annular groove 14a, 15, 14b
Are alternately communicated with the cylinder side (intake manifold M2 side) and the gas supply manifold M1 side of the engine on the radial inside. Thereby, the nozzle 1
Is introduced into the annular groove 15 in the circumferential direction, and when the seat 3 is opened, the gaseous fuel is uniformly introduced from the circumferential direction into the annular groove 15 and the annular grooves 14a and 14b adjacent to the inner and outer sides in the radial direction. Will be. Further, these annular grooves 14a, 15 and 14b can be formed up to the vicinity of the center of the nozzle 1, which is very advantageous in efficiently guiding the gas fuel to the radial inside of the seat 3. .

As shown in FIG. 1, an annular peripheral groove 16 is provided on the outer peripheral surface of the upper portion of the nozzle 1, that is, on the inner peripheral surface of the space X11c of the housing X11 corresponding to the upper portion of the nozzle 1. I have. The peripheral groove 16 communicates with the gas fuel introduction port X11a (the introduction path 11 of the nozzle 1) so that the gas fuel can be introduced. The other end (the right end in FIGS. 1 to 3) of the through hole 12 is open in the peripheral groove 16. In this case, the gas fuel from the introduction path 11 of the nozzle 1 is efficiently and smoothly guided from both ends of the through hole 12 to the radial inside of the sheet 3 through the peripheral groove 16.

Further, at the center position of the seat side surface 1b of the nozzle 1 (radially inward from the innermost annular groove 14a), a bolt receiving hole 17 for receiving a head BTa of a bolt BT described later in the nozzle 1 is provided. Is recessed. The bolt receiving hole 17 is located on a contact surface that comes into contact with the sheet 3 and, as shown in FIG.
Are communicated with the communication via the communication ports 12b. As shown in FIG. 1, the bolt housing hole 17 has a gap S around the head BTa of the bolt BT in a state where the head BTa of the bolt BT is housed, and penetrates through the gap S. Gas fuel is introduced from the holes 12. In this case, the through hole 12 in the nozzle 1 is
, The gas fuel from the introduction path 11 of the nozzle 1 flows smoothly through the through hole 12, and flows radially inward from the bolt accommodation hole 17 into the seat 3. It will be guided very smoothly.
In addition, the bolt housing hole 17 is used as a gas fuel supply path from the nozzle 1 side, and the vicinity of the center of the nozzle 1 (near the valve shaft m) can be effectively used.

The introduction path 11 of the nozzle 1 has a through-hole 12, an annular groove 15 communicating with the through-hole 12 and the two communication holes 12a, a peripheral groove 16, and a bolt accommodation hole 17. And a gap S. In this case, as shown by a dashed arrow in FIG.
1 is to introduce approximately half of the gas fuel introduced into the gas fuel inlet X11a into the through-hole 12 from one end of the through-hole 12 and the other end of the through-hole 12 through the peripheral groove 16; The gas fuel introduced into the inside 12 is guided radially inward of the nozzle side surface 3a of the seat 3 through the gap S between the annular groove 15 and the bolt housing hole 17.

<Retainer> The retainer 2 is formed in a disk shape having substantially the same diameter as the nozzle 1 as shown in FIG. 1 (see FIGS. 7 and 8). Seat side surface 2a of retainer 2
As shown in FIG. 9, a sheet receiving portion 21 that receives the sheet 3 when the sheet 3 is opened to separate from the nozzle 1 is provided on the lower surface side in FIGS. 1 and 9.
The seat receiving portion 21 is provided on the seat side surface 2 a of the retainer 2.
And is formed in a substantially cylindrical shape as shown in FIG.

As shown in FIGS. 1 and 7, the retainer 2 has two positioning pins (upper than the gas fuel inlet X11a) whose outer peripheral surface is located above the space X11c of the housing X11. (Not shown). FIG.
As shown in FIG. 5, the retainer 2 guides the remaining half of the gas fuel introduced from the gas supply manifold M1 to the gas fuel inlet X11a from above the sheet 3 to the nozzle side 3a of the sheet 3 via the sheet 3. An introduction path 22 is provided. The introduction path 22 includes a communication portion 23 that allows a radially outer portion of the retainer side surface 3b of the sheet 3 located radially outside the sheet receiving portion 21 and an outer peripheral surface of the sheet 3 to communicate with the gas supply manifold M1. I have. As shown in FIG. 8, the communication portion 23 (radially outward of the sheet receiving portion 21) has a radius of the sheet receiving portion 21 through four openings 21 a that are open at four positions at 90 ° circumferential direction of the sheet receiving portion 21. It communicates with the inside of the direction. Further, as shown in FIGS. 1 and 9, an armature insertion hole 24 is provided in the center of the retainer 2 so that the boss 41 of the armature 4 can be inserted in a loosely fitted state.
The introduction path 22 of the retainer 2 is connected to a communication section 23.
And each opening 21 a of the sheet receiving portion 21.

<Sheet> The sheet 3 is formed in a disk shape slightly smaller in diameter than the nozzle 1 and the retainer 2 (see FIGS. 10 and 11). As shown in FIGS. 1 and 12, a step portion 31 is provided on the retainer side surface 3 b (the upper surface side in FIGS. 1 and 12) of the seat 3 so that the radially inner portion is thicker than the radially outer portion. Have been.
As shown in FIG. 10 and FIG. 11, a plurality of opening holes 3 penetrating in the
Are continuously provided in the circumferential direction on the concentric circle with the valve shaft m with a long diameter. Each of the openings 32 is formed in a substantially track shape that is long in the circumferential direction.
2 (communication portion 23) is opened to the nozzle side surface 3 a of the sheet 3. Also, as shown in FIG.
On the nozzle side surface 3a of the seat 3 corresponding to the plurality of opening holes 32, an annular groove 33 (groove) is formed which is concentric with the valve shaft m. The annular groove 33 communicates with each of the opening holes 32. are doing. In this case, as shown by a broken line arrow in FIG. 1, the introduction path 22 of the retainer 2 introduces the remaining substantially half of the gas fuel introduced into the gas fuel introduction port X11a into the communication part 23, and the inside of the communication part 23 Gas fuel introduced into the seat 3
The sheet 3 is guided radially outward from the nozzle side surface 3 a of the sheet 3 through the annular groove 33 from each of the opening holes 32.
As shown in FIG. 1, the introduction path 22 of the retainer 2 is
The gas fuel introduced into the communication portion 23 can be directly guided from the outer peripheral surface of the seat 3 to the radially outer side of the nozzle side surface 3a.

As shown in FIG. 1, an insertion hole 3 through which the leg BTb of the bolt BT can be inserted is formed in the center of the seat 3.
4 are provided. Further, between the seat side surface 2a of the retainer 2 facing the inside in the radial direction of the sheet receiving portion 21 of the retainer 2 and the retainer side surface 3b radially outside of the step portion 31 of the seat 3, the nozzle 1 A single biasing spring 35 for biasing the seat 3 against the seat side surface 1b (downward in FIG. 1).
Has been disguised. The urging spring 35 is arranged such that its telescopic shaft (not shown) is concentric with the valve shaft m.
It is provided around.

The sheet receiving portion 21 of the retainer 2 has a width radially inward from an opposing position of the retainer 2 substantially opposing each of the opening holes 32 of the sheet 3, and is opposed to each of the opening holes of the sheet 3. A substantially quarter-arc cutout groove 25 is provided at the opposed position (radially outer portion of the sheet receiving portion 21).
Is provided. The cutout grooves 25 increase the cross-sectional area of the introduction path of the gaseous fuel into the respective openings 32 of the seat 3 and are configured as a part of the introduction path 22 of the retainer 2.

Here, a gas fuel supply path by the gas fuel supply valve X when supplying the fuel to the cylinder of the engine will be described. In this case, it is assumed that the gas fuel supply valve X is in a closed state as shown in the left part of FIG.

First, when the gas fuel supplied through the gas supply manifold M1 is guided from the gas fuel introduction port X11a of the housing X11, the gas fuel is vertically divided into the retainer 2 side and the nozzle 1 side with the sheet 3 interposed therebetween. .

At this time, approximately half of the gas fuel divided on the nozzle 1 side (lower side) than the sheet 3 is introduced into the nozzle side surface 3 a of the sheet 3 via the introduction path 11 of the nozzle 1. That is, as shown by the dashed arrow in FIG. 1, substantially half of the gas fuel introduced into the gas fuel introduction port X11a is supplied to the through hole 12 through one end side (the left side in FIG. 1) of the through hole 12 and the peripheral groove 16. From the other end (right side in FIG. 1)
The gas fuel introduced into the through hole 12 is guided radially inward of the nozzle side surface 3 a of the seat 3 through the gap S between the annular groove 15 and the bolt accommodation hole 17.

On the other hand, approximately half of the gas fuel divided on the retainer 2 side (upper side) with respect to the seat 3 is the retainer 2.
Is introduced into the nozzle side surface 3 a of the sheet 3 through the sheet 3 from the introduction path 22. In other words, as indicated by the dashed arrow in FIG. 1, almost the remaining half of the gas fuel introduced into the gas fuel introduction port X11a is introduced into the communication part 23,
The gas fuel introduced into the seat 3 is guided from each opening 32 of the seat 3 to the radial outside of the nozzle side surface 3 a of the seat 3 through the annular groove 33. Further, the gas fuel introduced into the communication portion 23 is directly guided from the outer peripheral surface of the seat 3 to a radially outer side of the nozzle side surface 3 a of the seat 3. At this time,
The gas fuel guided from each of the introduction paths 11 and 22 to the nozzle side surface 3a and the outer peripheral surface of the seat 3 is set to P2 (> P1) higher than the pressure P1 in the middle of the intake manifold M2, and the set pressure (P2) And acts on the nozzle side surface 3a and the outer peripheral surface of the sheet 3, respectively.

When a strong magnetic field is generated in the core upon opening the gas fuel supply valve X, the armature 4 is quickly attracted by the strong magnetic field, and the seat 3
Opens from the seat side surface 1b of the nozzle 1 at a distance of about 0.4 mm against the urging force of the urging spring 35, whereby the gas fuel supply valve X opens.

Then, the gas fuel from the introduction path 11 of the nozzle 1 flows into the gap S between the annular groove 15 and the bolt accommodation hole 17.
, The air flows positively into the innermost annular groove 14a and the central annular groove 14b among the annular grooves 14a to 14c of the nozzle side surface 3a of the sheet 3 on the low pressure side. on the other hand,
The gas fuel from the introduction path 22 of the retainer 2 passes through the respective opening holes 32 of the seat 3 and from the annular groove 33 to the outermost annular groove 14 a to 14 c of the nozzle side surface 3 a of the seat 3 on the low pressure side. Actively flows into the groove 14c and the central annular groove 14b, and the outermost annular groove 14
c flows positively from the outer peripheral surface of the sheet 3.

The gas fuel that has flowed into each of the annular grooves 14a to 14c of the nozzle 1 flows into each of the meniscus holes 13 through each of the communication holes 13a, and passes through each of the meniscus holes 13 into the gas fuel in the housing X11. The exhaust gas is discharged from the exhaust port X11b to the intake manifold M2, and supplied to the cylinder of the engine via the intake manifold M2.

Thereafter, when the valve opening time of the gas fuel supply valve X elapses, the magnetic field of the core is demagnetized, and the armature 4 is urged downward by the urging force of the urging spring 35 to push the seat 3 to the side surface of the nozzle 1. The gas fuel supply valve X is closed by contacting and closing the valve 1b. As a result, the nozzle side surface 3 of the sheet 3 is
The gas fuel guided to the a and the outer peripheral surface is shut off by the nozzle side surface 3a of the seat 3, and supply of the gas fuel to the cylinder of the engine becomes impossible.

In the case of the present embodiment, the gas fuel is vertically divided into the retainer 2 side and the nozzle 1 side at the gas fuel inlet X11a. Then, approximately half of the gas fuel introduced from the introduction passage 22 of the retainer 2 is guided to the radially outer annular groove 33 of the seat 3 through the track-shaped opening hole 32 penetrating the seat 3 in the valve axis direction. With sheet 3
The gas fuel from the introduction path 22 of the retainer 2 passes through the plurality of track-shaped opening holes 32 without passing through the narrow holes. In the state where they smoothly merge in the annular groove 33 of 3a and are uniformly adjusted in the circumferential direction,
The sheet 3 is introduced radially outward of the nozzle side surface. On the other hand, the remaining half gas fuel introduced from the introduction path 11 of the nozzle 1 is introduced into the through hole 12 from one end side and the other end side via the peripheral groove 16, and the annular groove 15 and the bolt accommodation hole 17 are formed. Nozzle side 3a of the sheet 3 through the gap S
Is guided radially inward. Accordingly, it is not necessary to extend the introduction passage 22 of the retainer 2 to the vicinity of the valve shaft m (near the bolt BT), and the gas fuel is efficiently guided to the radial inside of the seat 3 via the introduction passage 11 of the nozzle 1. become. As a result, the supply of gas fuel to the cylinder of the engine is performed smoothly and efficiently, and the performance of the engine can be sufficiently brought out.

Further, the gas fuel is guided to the nozzle side surface 3a of the sheet 3 via the introduction path 22 of the retainer 2 and the introduction path 11 of the nozzle 1, which are vertically opposed to each other with the sheet 3 interposed therebetween. It is sufficient to form only the opening 32 that opens only the introduction path 22 of the retainer 2 to the nozzle side surface 3a of the sheet 3, and the shape of the sheet 3 becomes very simple, and the strength of the sheet 3 can be improved. In addition, the processing cost can be reduced.
Further, since the plurality of opening holes 32 are provided so as to penetrate in the direction of the valve shaft m, the seat 3 can be formed in a simple disk shape, and the structure of the seat 3 is simplified. In addition, the seat 3 can be lightened by the annular groove 33 on the nozzle side surface 3 of the seat 3, and the responsiveness (opening / closing speed) when opening and closing the seat 3 can be greatly improved. Moreover, since each opening hole 32 of the seat 3 is continuously provided on a concentric circle with the valve shaft m, even if the seat 3 rotates around the valve shaft m, the introduction passage 22 of the retainer 2 is always opened by each opening hole. The sheet 3 can be opened to the nozzle side surface 3 a (in the annular groove 33) through the hole 32.

Each of the meniscus holes 13 is recessed in a line symmetrical manner with respect to an orthogonal line n perpendicular to the valve axis m on the side 1a of the seat opposite to the nozzle 1, and is formed on the side 1b of the seat of the nozzle 1 through the communication port 13a. The gas fuel guided to the nozzle side surface 3a of the seat 3 is communicated with the annular grooves 14a to 14c,
When the seat 3 is opened, it flows into each of the annular grooves 14a to 14c of the seat side surface 1b of the nozzle 1, and the annular grooves 14a to 14c
Thus, the oil is smoothly supplied from c to the cylinder side (intake manifold M2 side) of the engine through the large meniscus holes 13. Moreover, since each meniscus hole portion 13 is provided symmetrically with respect to the orthogonal line n orthogonal to the valve axis m, it can be easily formed without interfering with the through hole 12 extending in the orthogonal line n direction in the nozzle 1. Can be formed.

The single side surface between the seat side surface 2a of the retainer 2 and the retainer side surface 3b radially outward of the stepped portion 31 of the seat 3 are opposed to each other on the radial inner side of the sheet receiving portion 21 of the retainer 2. Since the biasing spring 35 is contracted, the layout of the biasing spring 35 between the retainer 2 and the seat 3 is not bothered, and the biasing spring 35 can be provided simply and at low cost. it can. In addition, the biasing spring 35 is provided around the valve axis m such that the expansion and contraction axis (not shown) is concentric with the valve axis m.
The introduction path 22 of the retainer 2 can be freely laid out on the radially outward side without interfering with the biasing pulley 35, and the degree of freedom of the layout of the introduction path 22 of the retainer 2 can be increased.

In addition, since the biasing spring 35 is provided radially inward of the sheet receiving portion 21 of the retainer 2, the sheet receiving portion 21 avoids interference with the biasing spring 35 while being radially inward. The seat receiving portion 21 of the retainer 2 when the seat 3 is opened.
The impact of the sheet 3 that abuts on the inner side in the radial direction can be efficiently reduced.

Further, the sheet receiving portion 21 of the retainer 2
Is a retainer 2 substantially facing each opening 32 of the sheet 3.
Is provided with a width inward in the radial direction from the opposing position, and a substantially quarter arc-shaped notch groove 25 is provided at the opposing position (radially outer portion of the sheet receiving portion 21) opposing each opening hole of the sheet. Are provided, so that the notch grooves 25 for enlarging the cross-sectional area of the introduction path of the gas fuel with respect to each opening 32 of the sheet 3
As a result, the gas fuel from the introduction path 22 of the retainer 2 is positively guided to each opening 32 of the seat 3, and the gas fuel is guided to the radial outside of the seat 3 through each opening 32 more efficiently. be able to.

<< Second Embodiment >> Next, a gas fuel supply valve according to a second embodiment of the present invention will be described with reference to FIGS.
8 will be described.

In this embodiment, the structures of the nozzle introduction path and the sheet opening hole of the first embodiment are changed. The other configurations except for the introduction path of the nozzle and the opening of the sheet are the same as those of the first embodiment, and are denoted by the same reference numerals and description thereof is omitted.

That is, as shown in FIGS. 13 and 14, the introduction path 11 ′ of the nozzle 1 ′ has a hole 18 extending in the orthogonal line n direction (radial direction) in the upper part of the nozzle 1 ′. . The hole 18 is open to the gas fuel introduction port X11a such that one end thereof faces the gas supply manifold M1, and the other end communicates with the bolt housing hole 17. Further, as shown in FIG.
Nozzle 1 'exposed to 11b, opposite to sheet side 1a'
In FIG. 13, a plurality of holes 19 which are concentric with the valve shaft m and radially defined by two radiations h, h and orthogonal lines n extending radially from the valve shaft m are provided in the lower surface. ,…
Is provided. As shown in FIGS. 13 and 15, the annular grooves 14a, 14b, and 14c of the seat side surface 1b '(upper surface in FIG. 13) of the nozzle 1' have bottom portions communicating with the holes 19, respectively. It communicates through the mouths 19a,. Further, as shown in FIG. 13, the annular groove 15 of the sheet side surface 1b ′ of the nozzle 1 ′ is located on the contact surface of the sheet side surface 1b of the nozzle 1 contacting the sheet 3, as shown in FIG. The bottom portion communicates with the hole 18 through one communication port 18a. The introduction path 11 ′ of the nozzle 1 ′ is formed with the hole 18 and the annular groove 1 communicating with the hole 18 via one communication hole 18 a.
5 and a gap S between the bolt housing holes 17 (see FIG. 1). In this case, the introduction path 1 of the nozzle 1 '
1 ′ introduces approximately half of the gas fuel introduced into the gas fuel inlet X11a into the hole 18 from one end of the hole 18;
The gas fuel introduced into the hole 18 is smoothly guided to the radial inside of the nozzle side surface 3 a of the seat 3 through the gap S between the annular groove 15 and the bolt receiving hole 17.

As shown in FIGS. 16 to 18, a plurality of openings 37,... Penetrating in the direction of the valve shaft m are provided radially outward of the seat 3 'in the circumferential direction on a circle concentric with the valve shaft m. It is provided continuously. Each of the opening holes 37 is formed in a substantially perfect circular shape, and is configured to open the introduction path 22 (communication portion 23) of the retainer 2 to the nozzle side surface 3a 'of the sheet 3'. As shown in FIG. 17, an annular groove 33 (groove) is formed in the nozzle side surface 3 a ′ of the sheet 3 ′ corresponding to the plurality of opening holes 37, and the annular groove 33 is formed in each of the opening holes 37. He communicates with him.

In the case of this embodiment, a plurality of perfect circular opening holes 37 for opening the introduction path 22 of the retainer 2 to the nozzle side surface 3a 'of the sheet 3' on the radially outer side of the sheet 3 '.
Are continuously provided at predetermined intervals in the circumferential direction on the concentric circle with the valve shaft m, so that each opening hole 37 is formed very easily, and the processing of the seat 3 'can be simplified. it can.

Also in this embodiment, the nozzle 1 '
The gas fuel from the introduction passage 11 ′ is smoothly guided from one end of the hole 18 to the radially inner side of the seat 3 ′ through the bolt accommodation hole 17 on the other end. As in the case, by using the bolt receiving hole 17,
The vicinity of the center of the nozzle 1 can be effectively used.

Then, the opposite side surface 1a 'of the nozzle 1'
, A plurality of holes 19,... Defined in the circumferential direction by the two radiations h, h and the orthogonal line n are formed with the communication ports 19a, 14b, 14c on the sheet side surface 1b ′ of the nozzle 1 ′, respectively. Because it communicates via ...
The gas fuel guided to the nozzle side surface 3a 'of the sheet 3'
When the sheet is opened, it flows into the annular grooves 14a to 14c of the sheet side surface 1b 'of the nozzle 1', and the respective annular grooves 14a to 14c
From c, the radiation is smoothly supplied to the intake manifold M2 side via each hole 19 defined by each radiation h and the orthogonal line n. Further, each hole 19 is formed by an orthogonal line n.
, The inside of the nozzle 1 ′ is orthogonal line n
Even when the holes 18 (introduction paths 11 ′) extending in the direction are configured, each hole 19 can be easily formed without interfering with such holes 18.

<< Third Embodiment >> Next, a gas fuel supply valve according to a third embodiment of the present invention is shown in FIGS.
5 will be described.

In this embodiment, the configurations of the retainer, the seat, and the biasing spring of the first embodiment are changed. The other configuration except for the retainer, the seat, and the urging spring is the same as that of the first embodiment, and the same reference numerals are given and the description is omitted.

That is, as shown in FIG. 19, the retainer 5 of the gas fuel supply valve X 'is formed in a disk shape having substantially the same diameter as the nozzle 1 as shown in FIGS. The seat side 5a of the retainer 5 (FIGS. 19 and 2)
As shown in FIG. 22, a sheet receiving portion 51 that receives the sheet 6 when the sheet 6 is opened and separates from the nozzle 1 is provided on the lower surface of the nozzle 2. As shown in FIG. 20, the seat receiving portion 51 is formed in a substantially cross shape that protrudes in four directions at four predetermined intervals around the valve shaft m.

As shown in FIG. 19, the outer peripheral surface of the upper part of the retainer 5 has the space X of the housing X11.
It is configured to be mounted on the upper part of 11c (above the gas fuel inlet X11a) while being positioned by two positioning pins (not shown). As shown in FIG. 19, this retainer 5 has a gas supply manifold M
About half of the remaining half of the gas fuel introduced from 1 into the gas fuel inlet X11a from above the sheet 6 through the sheet 6 through the nozzle side surface 6a of the sheet 6 (the lower surface in FIGS. 19 and 25).
Is provided. This introduction path 52
As shown in FIG. 21, are provided at four places between the mutually adjacent protruding portions 51b of the sheet receiving portion 51,
In addition, the radially outer portion of the retainer side surface 6b (the upper surface in FIGS. 19 and 25) of the sheet 6 and the outer peripheral surface 6c of the sheet 6 located between the projecting portions 51b, 51b of the sheet receiving portion 51 are connected to the gas supply manifold M1. There are provided communication portions 53,. Each communication portion 53 (between the projecting portions 51b, 51b of the sheet receiving portion 51) is shown in FIG.
9, and as shown in FIG. 21 and FIG.
The first protruding portion 51b communicates with the inside of the sheet receiving portion 51 in the radial direction through an opening 51a penetrating in the radial direction, and communicates with each other from the inside in the radial direction via each opening 51a. I have. FIG.
As shown in FIG. 7, concave grooves 51c are formed on the outer peripheral surface of each protruding portion 51b of the sheet receiving portion 51 so as to be depressed inward in the radial direction, and the communication portions 53, which are adjacent to each other via the concave grooves 51c. 53 are also connected. Further, as shown in FIG. 19, an armature insertion hole 54 that allows the boss 41 of the armature 4 to be inserted in a loosely fitted state is provided in the center of the retainer 5. The introduction path 52 of the retainer 5 is constituted by each communication portion 53, each opening 51 a of the sheet receiving portion 51 and each concave groove 51 c.

As shown in FIGS. 23 and 24, the sheet 6 is formed in a disk shape slightly smaller in diameter than the nozzle 1 and the retainer 5. Retainer side surface 6b of seat 6
As shown in FIGS. 19 and 25, a thick step 61 abuts on the sheet receiving portion 51. As shown in FIG. 23, the steps 61 are formed in a substantially cross shape that protrudes radially from four places at predetermined intervals around the valve shaft m. In this case, each projecting portion 61a of the step portion 61 is connected to each projecting portion 5 of the sheet receiving portion 51.
1b are provided so as to face each other.

As shown in FIGS. 23 and 24,
A plurality of opening holes 62 penetrating in the direction of the valve shaft m are provided on the radially outer side of the seat 6 on the concentric circle with the valve shaft m so as to have a long diameter in the circumferential direction and continuously. Each of the opening holes 62
Are formed in a substantially track shape that is long in the circumferential direction.
The introduction path 52 (communication portion 53) of the nozzle 6
a. Also, as shown in FIG. 25, the sheet 6 corresponding to the plurality of opening holes 62
An annular groove 63 (groove) is formed on the nozzle side surface 6a concentrically with the valve shaft m. The annular groove 63 communicates with each of the opening holes 62. In this case, as indicated by a broken line arrow in FIG. 19, the introduction path 52 of the retainer 5 introduces the remaining half of the gas fuel introduced into the gas fuel introduction port X11a into the communication part 53, and the communication part 53 The gas fuel introduced into the seat 6 is also communicated with the other communicating portion 53 through each opening 51a and each concave groove 51c, and each opening hole 6
2 is guided radially outward of the nozzle side surface 6a of the sheet 6 through the annular groove 63. FIG.
As shown in the figure, the introduction path 52 of the retainer 5 is
The gas fuel introduced into the inside can be guided directly from the outer peripheral surface 6c of the sheet 6 to the outside in the radial direction of the nozzle side surface 6a.

At the center of the seat 6, there is provided an insertion hole 64 through which the leg BTb of the bolt BT can be inserted.
Further, between the seat side surface 5a of the retainer 5 and the retainer side surface 3b of the stepped portion 61 of the seat 6, which are opposed to each other on the radial inner side of each opening hole 62 (annular groove 63) of the seat 6, that is, the sheet receiving portion of the retainer 5 Between the respective protruding portions 51b of the portion 51 and the respective protruding portions 61a of the step portion 61 of the sheet 6, bias is applied in a direction in which the sheet 6 comes into contact with the sheet side surface 1b of the nozzle 1 (downward in FIG. 19). Four urging springs 65 (only one is shown in FIG. 19) are compressed. Each of the biasing springs 65 is provided at predetermined intervals in the circumferential direction, and is provided around the valve axis m such that the respective expansion and contraction axes (not shown) are parallel to the valve axis m.

Reference numerals 55,... Shown in FIG. 21 denote seat portions which are respectively recessed on the seat 6 side of the seat receiving portion 51 so as to support the biasing springs 62 on the retainer 5 side. Further, reference numerals 66,... Shown in FIG.
Are seat portions recessed on the retainer 6 side of the step portion 61 so as to support the respective biasing springs 62 on the seat 6 side.

Here, a gas fuel supply path by the gas fuel supply valve X when supplying gas fuel to the cylinder of the engine will be described. In this case, it is assumed that the gas fuel supply valve X is in a closed state as shown in the left part of FIG.

First, when the gas fuel supplied through the gas supply manifold M1 is guided from the gas fuel introduction port X11a of the housing X11, the gas fuel is vertically divided into the retainer 5 side and the nozzle 1 side with the sheet 6 interposed therebetween. .

At this time, substantially half of the gas fuel introduced into the gas fuel inlet X11a passes through one end of the through hole 12 (the left side in FIG. 19) and the peripheral groove 16, as indicated by the dashed arrow in FIG. The gas fuel introduced into the through hole 12 from the other end side (the right side in FIG. 19) of the through hole 12 is introduced into the through hole 12 through the gap S between the annular groove 15 and the bolt receiving hole 17. The sheet 6 is guided radially inward of the nozzle side surface 6a.

On the other hand, approximately half of the gas fuel divided on the retainer 5 side (upper side) with respect to the seat 6 is the retainer 5.
Is introduced into the nozzle side surface 6a of the sheet 6 through the sheet 6 from the introduction path 52 of the sheet. That is, as indicated by the dashed arrow in FIG. 19, approximately the other half of the gas fuel introduced into the gas fuel introduction port X11a is introduced into the communication part 53, and the gas fuel introduced into the communication part 53 Through the opening 51 a and the respective concave grooves 51 c, it also communicates with the other communication portion 53, and is guided from each opening hole 62 of the sheet 6 to the radial outside of the nozzle side surface 6 a of the sheet 6 through the annular groove 63. Further, the gas fuel introduced into each communication portion 53 is directly guided from the outer peripheral surface 6c of the seat 6 to the radially outer side of the nozzle side surface 6a of the seat 6.

When the gas fuel supply valve X is opened against the urging force of each urging spring 65, the gas fuel from the introduction path 11 of the nozzle 1 flows through the gap between the annular groove 15 and the bolt accommodation hole 17. S positively flows into the innermost annular groove 14a and the central annular groove 14b. On the other hand, the gaseous fuel from the introduction passage 52 of the retainer 5 passes through the opening 63 of the seat 6 and from the annular groove 63 to the seat 6 on the low pressure side.
Of the annular grooves 14a to 14c of the nozzle side surface 6a, the outer circumferential groove 14c and the central annular groove 14b positively flow into the outer annular groove 14c, and the outermost annular groove 14c flows from the outer peripheral surface 6c of the sheet 6 Actively flows.

The gas fuel which has flowed into each of the annular grooves 14a to 14c of the nozzle 1 passes through each of the communication holes 13a and each of the semicircular holes 13 so as to have a gas fuel outlet X11 of the housing X11.
B is discharged to the intake manifold M2, and supplied to the cylinder of the engine via the intake manifold M2.

Thereafter, when the opening time of the gas fuel supply valve X elapses, the gas fuel supply valve X closes.

In the case of this embodiment, each biasing spring 65
Are provided radially inward of the respective opening holes 62 of the sheet 6, so that the introduction path 52 of the retainer 5 can be freely laid out on the radially outward side without interfering with the respective biasing pulls 65. In addition, the gaseous fuel from the introduction path 52 of the retainer 5 can be smoothly introduced into each opening 62 of the seat 6.

The present invention is not limited to the above embodiments, but includes various other modifications. For example, in the first and second embodiments, the sheet receiving portion 21 of the retainer 2 is provided with a width radially inward from a position where the retainer 2 substantially opposes each opening 32 of the sheet 3, The cutout groove 25 is provided at a position facing each opening of the sheet, but the sheet receiving portion may be provided radially inward of the opening of the sheet. In this case, the gas fuel from the introduction passage of the retainer is smoothly introduced into the nozzle side surface of the seat through the opening hole of the seat, so that the gas fuel is efficiently discharged to the outside of the seat in the radial direction through the introduction passage of the retainer. You will be well guided. Moreover, the sheet abuts against the sheet receiving portion of the retainer not radially outward than the opening hole whose strength is weakened but radially inward of the opening hole, and more effectively reduces the impact of the sheet, thereby reducing its own strength. Strength can be ensured.

In the third embodiment, the four urging springs 65 are contracted between the retainer 5 and the seat 6, but two or three urging springs are provided in each opening hole of the seat. Two, three, or five or more urging springs are provided at predetermined circumferential intervals between each protruding portion of the sheet receiving portion of the retainer and each protruding portion of the step portion of the sheet, which are opposed to each other on the radial inner side. It may be made to be contracted everywhere. In this case, it is assumed that each protruding portion of the sheet receiving portion of the retainer and each protruding portion of the step portion of the seat face each other at the compressed position of the biasing spring.

[0101]

As described above, according to the gas fuel supply valve of the first aspect of the present invention, the gas fuel from the fuel supply source is divided into the retainer side and the nozzle side with the sheet interposed therebetween, The gas fuel is supplied from the radial outside of the seat through the introduction passage of the retainer, while the gas fuel on the nozzle side is supplied from the radial inside of the seat through the introduction passage of the nozzle, so that the gas fuel is efficiently supplied to the internal combustion engine. And the performance of the internal combustion engine can be sufficiently brought out. Moreover,
It is sufficient to form only holes or grooves that open only the introduction path of the retainer in the sheet on the side of the nozzle of the sheet. This makes it possible to make the shape of the sheet very simple, improve the strength of the sheet, and reduce the processing cost. Can be reduced.

According to the gas fuel supply valve of the second aspect of the present invention, a plurality of opening holes having a long diameter in the circumferential direction are provided continuously on the outer side in the radial direction of the seat on the concentric circle with the valve shaft to provide a passage for introducing the retainer. Gas fuel from the introduction path of the retainer is introduced into each groove through the opening by opening the nozzle side surface of the seat and the groove concentrically concave with the valve shaft on the nozzle side surface of the seat to each opening hole. The sheet can be guided from the outside and fed from the radial outside of the sheet while merging in the groove. In addition, the seats can be formed in a simple plate shape by each opening hole penetrating in the valve shaft direction, and the structure of the seat can be simplified. Properties can be greatly improved. Moreover, the introduction path of the retainer can always be opened on the side surface of the nozzle of the seat by the respective opening holes concentric with the valve shaft.

According to the gas fuel supply valve of the third aspect of the present invention, a plurality of openings are continuously provided concentrically with the valve shaft on the radially outer side of the seat, and the introduction path of the retainer is provided on the side surface of the nozzle of the seat. By opening the sheet and connecting the groove on the nozzle side surface of the sheet to each of the opening holes, the structure of the sheet can be simplified and the responsiveness at the time of opening and closing the sheet can be improved. In addition, by providing each opening continuously on a concentric circle with the valve shaft, the introduction path of the retainer can always be opened on the nozzle side surface of the seat.

According to the gas fuel supply valve of the fourth aspect of the present invention, the gas fuel from the nozzle introduction passage penetrates by connecting the through hole of the nozzle introduction passage to the bolt accommodation hole in the nozzle. The fluid flows smoothly into the hole, and can be guided very smoothly from the bolt receiving hole to the radial inside of the sheet. Further, the vicinity of the center of the nozzle can be effectively used by the bolt receiving hole.

According to the gas fuel supply valve of the fifth aspect of the present invention, the other end of the hole extending in the nozzle in the radial direction toward the valve shaft communicates with the bolt receiving hole in the nozzle. The gas fuel from the nozzle introduction path can be smoothly guided to the inside in the radial direction of the sheet. In addition, the use of the bolt receiving hole makes it possible to effectively use the vicinity of the center of the nozzle.

According to the gas fuel supply valve of the sixth aspect of the present invention, the plurality of grooves concentric with the valve shaft on the seat side surface of the nozzle are formed on the inner side in the radial direction of the seat on the side of the internal combustion engine and on the side of the fuel supply source. By alternately communicating with each other, the gas fuel from the introduction path of the nozzle is guided in the circumferential direction via the groove inside the radial direction of the sheet, and is uniformly introduced into the groove adjacent to this groove from the circumferential direction when the sheet is opened. be able to. Further, each groove can be formed to the vicinity of the center of the nozzle, which is very advantageous in efficiently guiding the gaseous fuel to the radial inside of the sheet.

According to the gas fuel supply valve of the present invention, the groove on the seat side surface of the nozzle communicates with the pair of semicircular holes on the opposite side surface of the nozzle so that the nozzle can be opened when the seat is opened. The gas fuel flowing into the groove on the side surface of the seat can be smoothly supplied to the internal combustion engine through each of the large half-moon-shaped holes. Further, by providing each hole in line symmetry with respect to the orthogonal line, each hole can be easily formed without interfering with the introduction path extending in the orthogonal line direction in the nozzle.

According to the gas fuel supply valve of the eighth aspect of the present invention, the groove on the side surface of the nozzle is communicated with the plurality of holes defined by the plurality of radiations from the valve shaft on the opposite side surface of the nozzle. Accordingly, the gas fuel flowing into the groove on the seat side surface of the nozzle when the seat is opened can be smoothly supplied to the internal combustion engine through each hole. Further, by dividing each hole by a plurality of radiations, each hole can be easily formed without interfering with the introduction path extending in the radiation direction in the nozzle.

According to the gas fuel supply valve of the ninth aspect of the present invention, the peripheral groove on the outer peripheral surface side of the nozzle communicates with the introduction path of the nozzle, so that the gas fuel from the introduction path of the nozzle passes through the peripheral groove. The sheet can be efficiently and smoothly guided from both ends of the through hole toward the inside in the radial direction of the sheet.

According to the gas fuel supply valve of the tenth aspect of the present invention, a single urging spring is contracted between the retainer and the seat on the radially inner side of the seat receiving portion, whereby the urging spring is compressed. Without worrying about the layout
A simple and low-cost biasing spring can be provided. Moreover, by providing the telescopic shaft of the biasing spring concentrically with the valve shaft, the introduction path of the retainer can be freely laid out radially outward without interfering with the biasing pulley. Layout flexibility can be increased. Further, by providing the biasing spring radially inward of the seat receiving portion, the seat receiving portion can be moved closer to the radially inward side while avoiding interference with the biasing spring, and the sheet can be released when the seat is opened. The impact can be efficiently reduced.

According to the gas fuel supply valve of the eleventh aspect of the present invention, by providing the seat receiving portion radially inward of the opening of the seat, the gas fuel through the opening of the seat can be supplied to the side surface of the nozzle of the seat. And the gaseous fuel can be efficiently guided to the outside in the radial direction of the seat. In addition, the sheet is brought into contact with the sheet receiving portion of the retainer radially inward of the opening hole, so that the impact of the sheet can be reduced more efficiently, and the strength of the sheet can be secured.

According to the gas fuel supply valve of the twelfth aspect of the present invention, by providing a notch groove at the opposite portion of the seat receiving portion facing the opening hole of the seat, the gas fuel is supplied to the opening hole of the seat by the notch groove. By actively guiding the gaseous fuel, the gaseous fuel can be guided more efficiently to the outside in the radial direction of the seat through the introduction path of the retainer.

Further, according to the gas fuel supply valve of the present invention, by providing a plurality of biasing springs radially inward from the respective opening holes of the seat, the introduction path of the retainer can be adjusted by the respective biasing pulling. The gas fuel from the introduction passage of the retainer can be smoothly introduced into each opening of the seat in addition to being laid out more freely on the radially outward side.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a closed state and an open state of a gas fuel supply valve according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the nozzle taken along line AA in FIG.

FIG. 3 is a bottom view of the nozzle viewed from a side opposite to a sheet.

FIG. 4 is a plan view of the nozzle as viewed from a sheet side.

5 is a cross-sectional view of the nozzle taken along the line BB in FIG. 4;

FIG. 6 is a sectional view of the nozzle taken along line CC of FIG. 4;

FIG. 7 is a plan view of the retainer as viewed from the side opposite to the seat.

FIG. 8 is a bottom view of the retainer as viewed from a seat side.

9 is a cross-sectional view of the retainer, also taken along line DD in FIG.

FIG. 10 is a plan view of the sheet as viewed from the retainer side.

FIG. 11 is a bottom view of the same sheet as viewed from a nozzle side.

FIG. 12 is a cross-sectional view of the sheet cut along the line EE in FIG. 10;

FIG. 13 is a sectional view of the nozzle of the gas fuel supply valve according to the second embodiment of the present invention, taken along line FF in FIG.

FIG. 14 is a bottom view of the nozzle as viewed from the side opposite to the sheet.

FIG. 15 is a plan view of the nozzle as viewed from a sheet side.

FIG. 16 is a plan view of the same sheet as viewed from the retainer side.

FIG. 17 is a bottom view of the sheet as viewed from the nozzle side.

18 is a cross-sectional view of the sheet taken along line GG of FIG.

FIG. 19 is a sectional view showing a closed state and an open state of a gas fuel supply valve according to a third embodiment of the present invention.

FIG. 20 is a plan view of the retainer viewed from the side opposite to the seat.

FIG. 21 is a bottom view of the retainer as viewed from a seat side.

FIG. 22 is a sectional view of the retainer, also taken along line HH in FIG. 21.

FIG. 23 is a plan view of the same sheet as viewed from the retainer side.

FIG. 24 is a bottom view of the sheet as viewed from the nozzle side.

FIG. 25 is a sectional view of the sheet cut along the line II in FIG. 23;

[Explanation of symbols]

 1, 1 'Nozzle 1a, 1a' Anti-seat side surface 1b, 1b 'Seat side 11 Nozzle introduction path 12 Through hole 13 Half moon hole (hole) 14a, 14b, 14c Annular groove (groove) 16 Peripheral groove 17 Bolt accommodation Hole 18 Hole 19 Hole 2,5 Retainer 2a, 5a Seat side 21,51 Seat receiving part 22,52 Retainer introduction path 25 Notch groove 3,3 ', 6 Sheet 3a, 3a', 6a Nozzle side 32, 62 Opening hole 33, 63 Annular groove (groove) 35, 65 Urging spring 37 Opening hole 4 Armature (movable piece) BT Bolt BTa Head X, X 'Gas fuel supply valve m Valve shaft n Orthogonal line

Claims (13)

[Claims] 1. A gas fuel supply valve for supplying gaseous fuel from a fuel supply source to an internal combustion engine, comprising: a nozzle for supplying gaseous fuel to the internal combustion engine; and a retainer facing the nozzle from a valve axial direction. A seat interposed between the nozzle and the retainer so as to be movable in the valve axis direction, and a seat that comes in contact with and separates from the nozzle; The nozzle is provided with an introduction path for guiding gaseous fuel from a fuel supply source to the side surface of the nozzle of the sheet, and each of the introduction paths is open to separate the sheet from the nozzle. At the same time, the gas fuel is supplied to the internal combustion engine, while the gas fuel is not supplied to the internal combustion engine when the seat abuts on the nozzle. Is supplied from the radially outer side of the seat via the introduction path of the retainer, while being supplied from the radially inner side of the sheet via the introduction path of the nozzle. . 2. A plurality of opening holes, which penetrate in the valve axis direction so as to open the introduction path of the retainer to the side surface of the nozzle of the sheet, are formed radially outward of the seat in the circumferential direction on the concentric circle with the valve shaft. And, provided continuously, on the nozzle side of the sheet corresponding to the plurality of opening holes,
The gas fuel supply valve according to claim 1, wherein a groove is provided concentrically with the valve shaft, and the groove communicates with each of the opening holes. 3. A plurality of opening holes penetrating in the valve axis direction so as to open the introduction passage of the retainer to the side surface of the nozzle of the sheet on the radially outer side of the sheet, and are provided at predetermined intervals in the circumferential direction on a circle concentric with the valve axis. The nozzle side of the sheet corresponding to the plurality of opening holes,
The gas fuel supply valve according to claim 1, wherein a groove is provided concentrically with the valve shaft, and the groove communicates with each of the opening holes. 4. The seat is fastened to the movable piece for moving the seat in the valve axis direction from the valve axis direction by a bolt, and the nozzle introduction path extends in the nozzle in a direction orthogonal to the valve axis. The gas fuel supply valve according to claim 1, further comprising a through hole that penetrates, wherein the through hole communicates with a bolt receiving hole that receives a head of the bolt in a nozzle. 5. The seat is fastened to a movable piece for moving the seat in the valve axis direction by a bolt extending in the valve axis direction, and one end of the introduction path of the nozzle is open to a fuel supply source, and The other end has a hole extending radially in the nozzle toward the valve shaft, and the other end of the hole communicates with a bolt receiving hole for receiving the head of the bolt in the nozzle. The gas fuel supply valve according to claim 1, wherein: 6. A plurality of grooves, which are concentric with the valve shaft, are provided on a side surface of the seat of the nozzle, and these grooves are alternately provided on the inner side in the radial direction of the seat with respect to the internal combustion engine side and the fuel supply source side. The gas fuel supply valve according to claim 1, wherein the gas fuel supply valve is in communication. 7. A pair of substantially half-moon-shaped holes which are symmetrical with respect to an orthogonal line orthogonal to the valve shaft are formed in the side surface of the nozzle opposite to the seat side, and the seat side surface of the nozzle is provided with: The gas fuel supply valve according to claim 1, wherein a groove is provided on a contact surface that contacts the seat, and the groove communicates with each of the holes. 8. A plurality of holes defined by a plurality of radiations which are concentric with the valve shaft and extend radially from the valve shaft are provided on the opposite side surface of the nozzle from the seat, and the seat side surface of the nozzle is provided with a plurality of holes. The gas fuel supply valve according to claim 1, wherein a groove is provided on a contact surface that contacts the seat, and the groove communicates with the plurality of holes. 9. The gas fuel supply valve according to claim 4, wherein a peripheral groove is provided on an outer peripheral surface side of the nozzle, and the peripheral groove communicates with an introduction path of the nozzle. 10. A sheet receiving portion for receiving a sheet when the sheet is opened to separate the nozzle from the nozzle is provided on a side surface of the retainer, and retainers corresponding to each other radially inward of the sheet receiving portion. A single urging spring that urges the nozzle in the direction of bringing the sheet into contact with the nozzle is contracted between the valve and the seat. The urging spring has a telescopic shaft that is concentric with the valve shaft. The gas fuel supply valve according to claim 1, wherein the gas fuel supply valve is provided around a valve shaft. 11. The gas fuel supply valve according to claim 10, wherein the seat receiving portion is provided radially inward of the opening of the seat. 12. The sheet receiving portion is provided with a width radially inward from an opposing position of a retainer substantially opposing the opening of the sheet, and is provided at an opposing portion opposing each opening of the sheet. The gas fuel supply valve according to claim 10, wherein a cutout groove is provided so as to expand a gas fuel introduction path to each opening of the seat. 13. A plurality of biasing springs for biasing the sheet in a direction in which the sheet comes into contact with the nozzle are provided between the corresponding retainer and the sheet radially inward of each of the opening holes of the sheet. The compression spring is contracted at predetermined intervals in the circumferential direction on a circle concentric with the shaft, and each of the biasing springs is provided around the valve shaft so that each of the expansion and contraction shafts is parallel to the valve shaft. 3. The gas fuel supply valve according to 2.