WO2020174898A1

WO2020174898A1 - Fluid injection apparatus

Info

Publication number: WO2020174898A1
Application number: PCT/JP2020/000824
Authority: WO
Inventors: 松本　修一
Original assignee: 株式会社デンソー
Priority date: 2019-02-27
Filing date: 2020-01-14
Publication date: 2020-09-03
Also published as: JP2020139435A; DE112020000972T5

Abstract

This fluid injection apparatus is provided with a valve body (20) and a valving element (30). The valve body has a first valve seat (25a) and a second valve seat (25b). The valving element has a first valve part (36a) and a second valve part (36b) which are seated and unseated with respect to the first valve seat and the second valve seat, and which are disposed opposite the first and second valve seats, respectively. In response to displacement of the valving element, the first valving element and the second valving element are displaced integrally. When the first valve part is unseated and seated with respect to the first valve seat, injection of both a first fluid and a second fluid and termination of injection thereof take place, respectively. When the second valve part is unseated and seated with respect to the second valve seat, injection of the second fluid and termination of injection thereof take place, respectively.

Description

\¥0 2020/174898 1 ((17 2020/000824 Clarification

Title of invention: Fluid ejection device

Cross-reference of related applications

[0001] This application is a Japanese patent application filed on Feb. 27, 1921.

No. 0 3 4 4 8 5 and claims the benefit of its priority, the entire contents of which patent application is incorporated herein by reference. Technical field

[0002] The present disclosure relates to a fluid ejection device.

Background technology

[0003] In recent years, for the purpose of reducing carbon dioxide emitted from vehicles and reducing emissions, vehicles have been developed that use 〇 ◦ (compressed natural gas) as fuel for diesel engines instead of diesel oil. There is a problem that OO is less likely to burn when compressed in the cylinder of a diesel engine because it has a poorer ignitability than diesel oil. Therefore, it is considered to inject a small amount of light oil into the cylinder of a diesel engine for ignition. With such a configuration, it is necessary to install a fuel injection device that injects two types of fuel in the diesel engine. Conventionally, as a fuel injection device for injecting two kinds of fuel, for example, there is a fuel injection device described in Patent Document 1 below.

[0004] The fuel injection device described in Patent Document 1 includes a first valve needle and a second valve needle, and a first valve needle that are configured to control the injection of the first fuel and the second fuel. The first control chamber and the second control chamber, the first control valve, and the second control valve, which are associated with the second and second valves, respectively. The first control valve includes a first control valve member and is configured to change the pressure of the control fluid in the first control chamber so that the first valve needle is opened and closed. The second control valve includes a second control valve member and is configured to change the pressure of the control fluid in the second control chamber so that the second valve needle is opened and closed. The first control valve member and the second control valve member are configured to linearly move along the common control valve shaft. \\0 2020/174898 2 (: 17 2020/000824 Prior art documents)

Patent literature

[0005] Patent Document 1: Special Table 2 0 1 6-5 1 9 2 4 9 Publication

Summary of the invention

[0006] In the fuel injection device described in Patent Document 1, in order to inject two types of fuel,

Two control valves are required, which can complicate the structure.

It should be noted that such a problem is not limited to a fuel injection device that injects two types of fuel, but is a problem that is common to fluid injection devices that inject any two types of fluid.

[0007] An object of the present disclosure is to provide a fluid ejecting apparatus that has a structure that ejects two types of fluids and that can have a simple structure.

[0008] A fluid ejection device according to an aspect of the present disclosure includes: a valve body; and a valve body.

The valve body has a first valve seat and a second valve seat. The valve body is arranged so as to face both the first valve seat and the second valve seat, and is separated from and seated on the first valve seat and the second valve seat. And has a seated second valve. With the displacement of the valve body, the first valve body and the second valve body are physically displaced. The first valve portion separates from and seats on the first valve seat, so that injection and stop of injection of both the first fluid and the second fluid are performed. By injecting and stopping the injection of the second fluid, the second valve portion separates from and seats on the second valve seat.

[0009] According to this configuration, since the first valve portion and the second valve portion are formed in one valve body, the valve body corresponding to the first fluid, as in the conventional fuel injection device, and the first valve portion and the second valve portion are formed. It is possible to simplify the structure compared to the structure with separate valve bodies corresponding to the two fluids.

Brief description of the drawings

[0010] [FIG. 1] FIG. 1 is a block diagram showing a schematic configuration of a fuel injection system of a first embodiment.

[FIG. 2] FIG. 2 is a cross-sectional view showing a cross-sectional structure of the fluid ejecting apparatus according to the first embodiment. [FIG. 3] FIG. 3 is a cross-sectional view showing an operation example of the fluid ejection device of the first embodiment. \\0 2020/174898 3 卩 (: 170? 2020 /000824

[FIG. 4] FIG. 4 is a cross-sectional view showing a cross-sectional structure of a fluid ejecting apparatus of a first modified example of the first embodiment.

[FIG. 5] FIG. 5 is a sectional view showing a sectional structure of a fluid ejecting apparatus according to a second embodiment. [FIG. 6] FIG. 6 is a cross-sectional view showing a cross-sectional structure of a fluid ejection device of a comparative example.

[FIG. 7] FIG. 7 is a sectional view showing a sectional structure of a fluid ejecting apparatus according to a third embodiment. [FIG. 8] FIG. 8 is a sectional view showing a sectional structure of a fluid ejection device of a comparative example.

[FIG. 9] FIG. 9 is a sectional view showing a sectional structure of a fluid ejecting apparatus according to a fourth embodiment. [FIG. 10] FIG. 10 is a sectional view showing a sectional structure of a fluid ejecting apparatus according to a fifth embodiment.

[FIG. 11] FIG. 11 is a cross-sectional view showing an operation example of the fluid ejection device of the fifth embodiment.

[FIG. 12] FIG. 12 is a sectional view showing a sectional structure of a fluid ejecting apparatus according to a sixth embodiment.

MODE FOR CARRYING OUT THE INVENTION

[001 1] Hereinafter, embodiments of the fluid ejection device will be described with reference to the drawings. In order to facilitate understanding of the explanation, the same constituent elements in each drawing are denoted by the same reference numerals as much as possible, and redundant description will be omitted.

First, an outline of the fuel injection system 1 shown in Fig. 1 will be described. The fuel injection system 1 shown in Fig. 1 is a system that injects two kinds of fuel, ◯° and light oil, into the cylinder 100 of the diesel engine of the vehicle. ◯° is the main fuel of the diesel engine. Light oil is used as a fuel for ignition. In the present embodiment, light oil corresponds to the first fluid,

Corresponds to the second fluid, which is a flammable gas. The fuel injection system 1 includes a fluid injection device 10, a gas fuel tank 110, a liquid fuel tank 120, a gas fuel pump 1300, a liquid fuel pump 1440, and a drive unit 150. And a controller 1600. In this embodiment, the controller 160 corresponds to the control unit.

[0012] In the gaseous fuel tank 110, OO, or OO has liquefied at low temperature! -〇 ( \\0 2020/174898 4 卩 (: 170? 2020 /000824

Liquefied natural gas). The gas fuel pump 1300 pumps the gas fuel tank 1100 filled in to the fluid injection device 1O. Alternatively, the gas fuel pump 1300 pressure-feeds !_° filled in the gas fuel tank 1100 to the fluid injection device 1 0 as the pressure increased to a pressure necessary for injection. The liquid fuel tank 120 is filled with light oil. The liquid fuel pump 140 sends the light oil filled in the liquid fuel tank 120 to the fluid injection device 10 under pressure.

The fluid ejecting apparatus 10 includes a valve body 20 formed in a cylindrical shape around the axis 1 and a valve body 30 housed inside the valve body 20. The valve body 30 is displaced in the direction along the axis 1 based on the driving force applied from the driving unit 150. As the drive unit 150, for example, an actuator that displaces the valve body 30 by applying an electromagnetic force to the valve body 30 by using solenoid or the like can be used. When the valve body 30 is displaced by the drive unit 150, the valve body 30 opens and closes. In the fluid injection device 100, when the valve body 30 is opened, and the light oil is injected into the cylinder 100 of the diesel engine.

[0014] The controller 160 is mainly composed of a micro computer having a II and a memory. The controller 1600 controls the gas fuel pump 1300 so that the fluid injection device 1

Adjust the pressure of. Further, the controller 160 controls the liquid fuel pump 140 to adjust the pressure of the light oil supplied to the fluid injection device 10. The controller 1600 controls the gas fuel pump 1300 and the liquid fuel pump 1440 so that the pressure of 0 and the pressure of light oil supplied to the fluid injection device 10 are the same. There is. Further, the controller 160 controls the drive unit 150 to control the opening/closing operation of the valve body 30. The controller 1600 controls the injection amount and injection timing of 0 0 and light oil injected into the cylinder 100 by controlling the gas fuel pump 1300, the liquid fuel pump 1440, and the drive unit 150. Execute the controlled fuel injection control.

Next, the structure of the fluid ejection device 10 will be specifically described. \¥0 2020/174898 5 卩 (: 17 2020 /000824

As shown in FIG. 2, the valve body 20 is formed in a cylindrical shape around the axis 1. Note that in the following, for convenience, of the directions 1 and 2 parallel to the axis 1 shown in FIG. 2, one direction is also referred to as an upper direction and two directions are also referred to as a lower direction.

[0016] Inside the valve body 20, a first valve body accommodating hole is formed so as to extend along the axis 1.

21 and a second valve body accommodation hole 22 are formed. The first valve body accommodating hole 21 is formed so as to extend upward from the tip end portion of the valve body 20. The second valve body accommodation hole 22 is formed so as to communicate with the upper end portion of the first valve body accommodation hole 21. The cross sections of the first valve body housing hole 2 1 and the second valve body housing hole 22 which are orthogonal to the axis 1 are circular. The inner diameter of the second valve body accommodation hole 22 is larger than the inner diameter of the first valve body accommodation hole 21. The valve body 30 is accommodated in the first valve body accommodation hole 21 and the second valve body accommodation hole 22. The gap formed between the inner peripheral surface of the second valve body accommodating hole 22 and the outer peripheral surface of the valve body 30 constitutes the first supply passage 11 1. Light oil is supplied to the first supply channel \^/ 1 1. The gap formed between the inner peripheral surface of the first valve body accommodating hole 21 and the outer peripheral surface of the valve body 30 constitutes a second supply flow path] 2. In the second supply channel \^/12, the 3rd valve formed in the valve body 20

Is being supplied.

A sliding seal portion 40 is provided between the inner peripheral surface of the upper end portion of the first valve body housing hole 21 and the outer peripheral surface of the valve body 30. The sliding seal portion 40 is formed in an annular shape around the axis 1. The sliding seal portion 40 seals a gap formed between the inner peripheral surface of the first valve body accommodating hole 21 and the outer peripheral surface of the valve body 30. As a result, the first supply channel \^/ 1 1 and the second supply channel \^/ 12 are configured as independent channels. The sliding seal portion 40 supports the valve body 30 slidably in the direction along the axis 1.

An injection hole 29 is formed in the center of the tip of the valve body 20 so as to penetrate from the first valve body housing hole 21 to the outside of the valve body 20. Nozzle 29 is

And light oil are injected into the cylinder 100. A conical surface 24 is formed on the inner peripheral surface of the first valve body accommodation hole 21 at a portion located at the tip of the valve body 20. \\0 2020/174898 6 卩 (: 170? 2020 /000824

ing. The conical surface 24 is formed centering on the axis 1 and is formed such that the cross-sectional area of the internal space orthogonal to the axis 1 becomes smaller as it approaches the injection hole 29.

The valve body 30 is formed in a bottomed cylindrical shape centering on the axis 1. The tip of the valve body 30 is formed in a conical shape around the axis 1. The conical surface 35 formed at the tip of the valve body 30 is arranged so as to face the conical surface 24 of the valve body 20. The conical surface 35 is provided with an annular groove 34 formed in an annular shape around the axis 1. The conical surface 35 of the valve body 30 has two surfaces bounded by the annular groove 3 4.

It is divided into 3 610. In the following, the one surface 368 will be referred to as the "first valve portion 36.sub.3" and the other surface 36.sub.6 will be referred to as the "second valve portion 36.sub.6".

Inside the valve body 30 is formed an introduction flow path 31 so as to extend along the axis 1. The valve body 30 has an introduction flow passage 32 formed so as to penetrate from the outer peripheral surface of the valve body 30 facing the first supply flow passage 11 to the inner peripheral surface of the introduction flow passage 31. A plurality of introducing channels 33 are formed at the tip of the valve body 30 so as to extend from the annular groove 34 to the inner peripheral surface of the introducing channel 31.

Next, an operation example of the fluid ejection device 10 will be described.

As shown in Fig. 3, when the valve body 30 is in the closed state, the first valve portion 3 6 3 and the second valve portion 3 6 of the valve body 30 are placed on the conical surface 24 of the valve body 20. I am sitting. In the following, of the conical surface 24 of the valve body 20 the surface on which the first valve portion 3 63 of the valve body 30 sits is referred to as the first valve seat 2 5 3 and the second valve of the valve body 30 The surface on which the part 36 is seated is called the second valve seat 25. When the valve body 30 is in the closed state, the gaps formed between the valve portions 3 63 and 36 of the valve body 30 and the conical surface 24 of the valve body 20 are blocked. Therefore, the light oil supplied to the first supply passage \^/ 1 1 and the 0° supplied to the second supply passage 12 are not injected from the injection hole 29.

[0022] Note that due to variations in processing of the valve body 30 and the valve body 20, the cone angle of the conical surface 35 of the valve body 30 and the cone angle of the conical surface 2 4 of the valve body 20 are actually There is a possibility that some variation will occur. Due to such processing variations, the first valve seat 2 5 3 of the valve body 20 and the first valve portion 3 6 3 of the valve body 30 \¥0 2020/174898 7 卩 (: 170? 2020 /000824

A gap may be formed between the second valve seat 25 of the valve body 20 and the second valve portion 36 of the valve body 30. If a gap is formed between them, there is a concern that ◯° and light oil may leak to the outside even though the valve body 30 is closed.

[0023] In this respect, if the gap between the first valve seat 2 53 of the valve body 20 and the first valve portion 3 63 of the valve body 30 is surely closed, the valve body 20 0 Even if a slight gap is formed between the second valve seat 25 and the second valve portion 36 of the valve body 30, it is possible to prevent leakage of diesel oil. Therefore, in the fluid injection device 100 of the present embodiment, when the valve body 30 is closed, the second valve seat 25 of the valve body 20 and the second valve portion 36 of the valve body 30 are closed. Although it is within the allowable range that a slight gap is formed between the first valve seat 2 5 3 of the valve body 20 and the first valve portion 3 6 3 of the valve body 30. Is preferred.

[0024] When the drive unit 150 lifts the valve body 30 from the state shown in Fig. 3, as shown in Fig. 2, the first valve unit 3 63 and the second valve unit 3 6 of the valve body 30 are The part 36 is separated from the first valve seat 2 53 and the second valve seat 25 of the valve body 20. That is, the valve body 30 is opened by the physical displacement of the first valve portion 363 and the second valve portion 36 along with the displacement of the valve body 30. As a result, the first injection passage \^ 2 1 is formed between the first valve portion 3 6 3 of the valve body 30 and the first valve seat 2 5 ₃ of the valve body 20 and the valve body 3 A second injection passage \^/ 2 2 is formed between the second valve portion 36 of 0 and the second valve seat 25 of the valve body 20. Therefore, the first supply channel]

The light oil supplied to 1 is injected from the injection hole 29 through the introduction flow paths 31 to 33 and the first injection flow path \^/21 of the valve body 30. Further, 0° supplied to the second supply flow path \^/ 12 is injected from the injection hole 29 through the second injection flow path 22 and the first injection flow path 21. Therefore, light oil and

Is injected into the cylinder 100.

As described above, in the fluid ejection device 10 of the present embodiment, the first valve portion 3 of the valve body 30 is

6 3 is separated from and seated on the first valve seat 2 5 3 of the valve body 20 so that light oil and

Both the injection and the stop of the injection are performed. In addition, the valve body 30 \¥0 2020/174898 8 卩 (: 170? 2020 /000824

The second valve portion 36 of the valve seat is separated from and seated on the second valve seat 25 of the valve body 20.

Injection and stop of injection are performed.

According to the fluid ejection device 10 of the present embodiment described above, the following (1) to (

The action and effect shown in 9) can be obtained.

(1) Since the first valve part 3 63 and the second valve part 36 are formed in one valve body 30, it corresponds to each of the two types of fluid like the conventional fuel injection device. The structure can be simplified as compared with the structure having three valve bodies.

[0027] (2) The first valve section 3 63 and the second valve section 36 of the valve body 30 are the first valve section of the valve body 20.

When separated from the 1st valve seat 2 5 3 and the 2nd valve seat 25, the light oil is the first injection flow path of the 1st injection flow path 1 and the 2nd injection flow path 2 2 \^/ 2 1 Only 0 flows through the first and second injection channels 21 and 22 and is injected. With such a configuration, it is possible to eject two types of fluid with a simple structure.

[0028] (3) The valve body 30 has an introduction passage 3 1 for introducing light oil into the first injection passage \^/ 21.

~ 33 are formed. With such a configuration, it is possible to simplify the structure for injecting light oil.

(4) at the distal end of the valve body 3 0, the same conical surface 35 having a first valve portion 3 6 ₃ and the second valve portion 3 6 spoon coaxially is formed. The valve body 20 is formed with the same conical surface 24 having the first valve seat 25 3 and the second valve seat 25 coaxially. According to this structure, the conical surface 35 of the valve body 30 is brought into contact with the conical surface 24 of the valve body 20 by the axial driving force applied to the valve body 30 from the drive section 150. Then, due to the wedge effect, a force greater than the axial force applied to the valve body 30 is applied to the contact portion between the first valve seat 2 5 ₃ and the first valve portion 3 6 3, and the second valve. It can be applied to the contact portion between the seat 25 and the second valve portion 36. Therefore, the valve body 30 can be closed more accurately.

(5) The first valve portion 363 and the second valve portion 613 are formed as surfaces on the conical surface 35 of the valve body 30. The first valve seat 2 53 and the second valve seat 25 are formed as surfaces on the conical surface 24 of the valve body 20. The conical surface 35 of the valve body 30 has a ring \¥0 2020/174898 9 卩 (: 170? 2020 /000824

A groove 3 4 is formed. The conical surface 35 of the valve body 30 is formed with a first valve portion 3 63 and a second valve portion 36 with a portion corresponding to the annular groove 34 as a boundary. A first valve seat 25 3 and a second valve seat 25 are formed on the conical surface 24 of the valve body 20 with a portion corresponding to the annular groove 34 as a boundary. According to such a configuration, the first valve seat 25 3 and the second valve seat 25 are formed on the conical surface 24 of the valve body 20 with ridge lines, and the conical surface 3 of the valve body 30 is formed. Compared with the case where the first valve portion 363 and the second valve portion 336 are formed on the ridge line in 5, the machining of the valve body 20 and the valve body 30 becomes easier.

(6) If the annular groove 34 is not formed in the valve body 30, light oil is introduced from the plurality of introduction channels 3 3 of the valve body 30 into the first injection channel \^/ 2 1. Will be supplied directly. In this case, light oil will easily flow to the portion of the conical surface 35 of the valve body 30 where the plurality of introduction flow passages 33 are open, while the plurality of introduction flow passages 33 will not be opened. Light oil is hard to flow. Therefore, the flow rate distribution of light oil varies in the circumferential direction of the conical surface 35 of the valve body 30. This causes unevenness in the injection state of the light oil injected from the fluid injection device 10. In this respect, in the fluid injection device 10 of the present embodiment, the light oil flowing through the plurality of introduction channels 33 flows into the annular groove 34, so that the light oil flows in the circumferential direction of the conical surface 35 of the valve body 30. Since it is possible to reduce the variation in the flow rate distribution of, the unevenness in the injection state of the light oil injected from the fluid injection device 10 is less likely to occur.

[0031] (7) The introduction flow passage 33 functions as a throttle unit that adjusts the flow rate of the light oil supplied from the introduction flow passage 3 1 to the first injection flow passage \^/ 21. With such a configuration, it is possible to easily adjust the injection amount of light oil.

(8) The pressure for injection applied to light oil and the pressure for injection applied to 0.00 are set to the same pressure. According to such a configuration, light oil supplied from the introduction flow passage 33 of the valve body 30 to the first injection flow passage \^/ 2 1 flows to the second supply flow passage \^/ 12 2, It is possible to avoid that 0 supplied from the second supply flow passage \^/ 12 to the second injection flow passage \^/ 2 2 flows into the introduction flow passage 33 of the valve body 30. Therefore, it is difficult for the light oil and XX to mix inside the fluid ejection device 10. \¥0 2020/174898 10 (: 17 2020 /000824

It

(9) The fluid ejection device 10 ejects light oil, which is a liquid, and OO, which is a gas. According to such a configuration, it is possible to utilize the expansion energy of the gas ◯° to improve the injection speed of the liquid gas oil and to atomize the liquid gas oil more. ..

[0033] (First Modification)

Next, a first modified example of the fluid ejection device 10 of the first embodiment will be described. As shown in FIG. 4, in the valve body 20 of this modified example, an annular groove 14 and a supply channel 15 are formed as a channel for supplying 0° to the second supply channel 12. Has been done. Annular groove

An annular shape is formed on the outer peripheral surface of the valve body 20. The supply channel \^/ 15 is formed so as to connect the annular groove \^/ 14 and the second supply channel \^/ 1 2. In the fluid injection device 10 of the present modification, 0° is supplied from the gas fuel pump 1300 to the annular groove 14. Supplied to annular groove 1 4

It is supplied to the second supply channel \^/ 1 2 through the supply channel \^/ 1 5. Even with such a configuration, the second supply flow formed inside the valve body 20

Can be supplied.

[0034] (Second Modification)

Next, a second modified example of the fluid ejection device 10 according to the first embodiment will be described. The controller 1600 of the present modification is configured so that the gas fuel pump 1300 and the liquid fuel pump 1440 are controlled so that the pressure of OO is higher than the pressure of the light oil supplied to the fluid injection device 10. Control. That is, in this modification, the pressure for injection applied to OO is higher than the pressure for injection applied to light oil. With such a configuration, it is possible to inject light oil using the flow velocity of 0.00. Further, since the pressure applied to the light oil for injection can be reduced, it is possible to use a small-sized pump as the liquid fuel pump 140.

[0035] The pressure applied to the light oil for injection can be set to zero. With such a configuration, the liquid fuel pump 140 itself is unnecessary. \\0 2020/174898 1 1 卩 (: 170? 2020 /000824

be able to.

(Third modification)

Next, a third modified example of the fluid ejection device 10 of the first embodiment will be described.

The controller 160 of the present modified example uses the gas fuel pump 130 and the liquid fuel pump 140 so that the pressure of the light oil is higher than the pressure of 0 supplied to the fluid injection device 10. To control. That is, in this modification, the pressure for injection applied to diesel fuel is higher than the pressure for injection applied to XOO. With such a configuration, it is possible to cause the light oil flowing through the first supply flow path \^/ 1 1 to flow into the sliding portion between the sliding seal portion 40 and the valve body 30. In addition, the light oil flowing in the first supply channel \^/11 is also applied to the sliding part between the second valve seat 25 and the second valve section 36 by way of the introduction channels 31-33. It is possible to inflow. By flowing the light oil into at least one of the sliding parts, it is possible to lubricate at least one of the sliding parts, so that the wear of the sliding parts can be suppressed.

[0037] (Fourth Modification)

Next, a fourth modified example of the fluid ejection device 10 according to the first embodiment will be described. The controller 160 of the present modification executes drive control for adjusting the lift amount, valve opening time, etc. of the valve body 30 by controlling the drive unit 150. The controller 1600 responds to the situation by controlling the drive of the valve body 30.

Adjust the firing rate. Further, the controller 160 controls the liquid fuel pump 140 to perform pressure control for adjusting the pressure applied to the light oil for injection. The controller 160 controls the injection amount of light oil through the pressure control of the liquid fuel pump 140. According to such a configuration,

It is possible to control the injection amount of both ○○ and diesel oil without the need for pressure regulation.

[Second Embodiment]

Next, a second embodiment of the fluid ejection device 10 will be described. Hereinafter, differences from the fluid ejection device 100 of the first embodiment will be mainly described. \¥0 2020/174898 12 (: 170? 2020 /000824

As shown in FIG. 5, when the valve body 30 is closed, the fluid ejecting apparatus 10 of the present embodiment has the first valve portion 3 6 3 and the second valve portion 36 6 of the valve body 30. The entire surface of each of the is configured to contact the conical surface 24 of the valve body 20. More thereto, when the contact portion between the first valve seat 2 5 ₃ and the valve element 3 first valve portion 3 6 3 0 of the valve body 2 0 and the first isolation portion, the inner diameter of the first isolation portions ų 1 0 Is equal to the inner diameter of the first valve portion 3 63 of the valve body 30 and the outer diameter ¢ 11 of the first seat portion is equal to the outer diameter of the first valve portion 3 63 of the valve body 30. Further, if the contact portion between the second valve seat 25 of the valve body 20 and the second valve portion 36 of the valve body 30 is the second seat portion, the inner diameter ø20 of the second seat portion is The inner diameter of the second valve portion 36 of the valve body 30 is equal to the outer diameter ø 2 1 of the second seal portion is equal to the outer diameter of the second valve portion 36 of the valve body 30.

FIG. 6 shows, as a comparative example, a fluid injection device 10 configured such that a part of the first valve portion 3 63 of the valve body 30 contacts the conical surface 24 of the valve body 20. The cross-sectional structure is illustrated. In this case, the inner diameter ø 10 of the first seat portion is equal to the inner diameter of the conical surface 24 of the valve body 20 and the outer diameter 0 1 1 of the first seat portion is the first valve portion 3 of the valve body 30. It is equal to the outer diameter of 6 3. In the case of the structure shown in Fig. 6, the accuracy of the concentricity of the four diameters 0 1 0, 0 1 1, 0 2 0, ø 2 1 and the accuracy of the widths of the first and second seat parts are In order to raise the height, a high machining accuracy is required for each of the conical surface 24 of the valve body 20 and each of the valve portions 3 63, 3 6 of the valve body 30. Therefore, it may be difficult to improve the accuracy of the concentricity and width of the first sheet portion and the second sheet portion.

On the other hand, in the fluid ejection device 10 of the present embodiment shown in FIG. 5, the accuracy of the coaxiality of the four diameters 0 1 0, 0 1 1, 0 2 0, ¢ 2 1 and the first In order to improve the accuracy of the width of the seat part and the second seat part, basically, each valve part of the valve body 30

With regard to 3 6 13 it is only necessary to increase the processing accuracy. Therefore, it is possible to easily improve the accuracy of the concentricity and width of the first and second seat portions.

According to the fluid ejecting apparatus 10 of the present embodiment described above, it is possible to further obtain the action and effect shown in (10) below. \¥0 2020/174898 13 卩 (: 170? 2020 /000824

(1 0) In the fluid injection device 10 having the structure shown in FIG. 5, the first valve portion 3 63 and the second valve portion 3 6 of the valve body 30 have the first valve seat 2 of the valve body 20. When seated on 5 3 and the second valve seat 25, the entire surface of the first valve portion 36 3 and the entire surface of the second valve portion 36 contact the conical surface 24 of the valve body 20. According to this structure, the inner diameter 0 1 0 and the outer diameter 0 11 of the first seat portion, the inner diameter 0 2 0 and the outer diameter ø 2 1 of the second seat portion, and the accuracy of the first sheet It becomes easy to improve the accuracy of the width of the second portion and the second sheet portion.

Next, a third embodiment of the fluid ejection device 10 will be described. Hereinafter, differences from the fluid ejection device 100 of the first embodiment will be mainly described.

As shown in FIG. 7, in the fluid ejection device 10 of the present embodiment, a flat surface 37 is formed at the tip of the valve body 30. The plane surface 37 is provided with an annular groove 34 formed in an annular shape around the axis 1. The valve body 30 is formed with a plurality of introduction channels 33 so as to extend from the annular groove 34 to the inner peripheral surface of the introduction channel 31. A concave portion 38, which is formed in a circular shape around the axis 1, is provided in a portion inside the annular groove 34 on the plane 37.

A flat surface 26 is formed in a portion of the inner peripheral surface of the first valve body housing hole 21 of the valve body 20 located at the tip of the valve body 20. The plane 26 of the valve body 20 faces the plane 37 of the valve body 30. An injection hole 29 is formed at the center of the tip of the valve body 20 so as to penetrate from the first valve body accommodation hole 21 to the tip surface of the valve body 20. The inner diameter of the injection hole 29 is smaller than the inner diameter of the recess 38 of the valve body 30.

[0044] The plane 37 of the valve body 30 is bounded by the annular groove 34.

It is divided into 3 6 b. In the following, one surface 3 63 is referred to as "first valve portion 3 63" and the other surface 36 6 is referred to as "second valve portion 3 6". The first valve portion 36 is a portion of the plane 37 of the valve body 30 that is located inside the annular groove 34 and outside the recess 38, and that is also the valve body 20. It is a portion facing the plane 26 of. The second valve section 36 has a circular groove 34 in the plane 37 of the valve body 30. \¥0 2020/174898 14 卩 (: 170? 2020 /000824

It is a portion located on the outermost side and facing the plane 26 of the valve body 20.

[0045] Of the plane 26 of the valve body 20, the portion where the first valve portion 3 63 of the valve body 30 comes into contact when the valve body 30 closes constitutes the first valve seat 2 5 3. However, the portion of the valve body 30 in contact with the second valve portion 36 has the second valve seat 25.

In the fluid injection device 10 of the present embodiment shown in FIG. 7, when the valve body 30 is closed, the entire surface of the first valve portion 3 6 3 of the valve body 30 is a flat surface 2 6 of the valve body 20. Is configured to contact. As a result, when the contact portion between the first valve seat 2 53 of the valve body 20 and the first valve portion 3 63 of the valve body 30 is the first seat portion, the inner diameter 0 1 0 of the first seat portion is The inner diameter of the first valve portion 3 63 of the valve body 30 is equal to the outer diameter ø 1 1 of the first seat portion is equal to the outer diameter of the first valve portion 3 6 3 of the valve body 30. Further, if the contact portion between the second valve seat 25 of the valve body 20 and the second valve portion 36 of the valve body 30 is the second seat portion, the inner diameter 0 2 0 of the second seat portion is The inner diameter of the second valve portion 36 of the body 30 is equal to the outer diameter 0 21 of the second seat portion is equal to the outer diameter of the second valve portion 36 of the valve body 30.

As a comparative example, FIG. 8 illustrates a cross-sectional structure of the fluid ejection device 10 in which the recess 37 is not provided in the plane 37 of the valve body 30. In this case, the inner diameter 0 1 0 of the first cover part is equal to the inner diameter of the flat face 26 of the valve body 20 and the outer diameter 0 1 1 of the first cover part is the first valve part 3 of the valve body 30. It is equal to the outer diameter of 6 3. In the case of the structure shown in Fig. 8, the accuracy of the concentricity of the four diameters ø 1 0, 0 1 1, 0 2 0, ¢ 2 1 and the accuracy of the width of each of the first and second seat parts are To increase the valve body

High processing accuracy is required for each of the 3 613. Therefore, it may be difficult to improve the accuracy of the concentricity and width of the first sheet portion and the second sheet portion.

On the other hand, in the fluid ejection device 10 of the present embodiment shown in FIG. 7, the accuracy of the coaxiality of the four diameters 0 1 0, 0 1 1, 0 2 0, ¢ 2 1 and the first In order to improve the accuracy of the width of the seat part and the second seat part, basically, each valve part of the valve body 30

With regard to 3 6 13 it is only necessary to increase the processing accuracy. That \\0 2020/174898 15 卩 (: 170? 2020 /000824

Therefore, it is possible to easily improve the accuracy of the concentricity and the width of the first seat portion and the second seat portion.

According to the fluid ejection device 10 of the present embodiment described above, the above (1) to (

3) In addition to the actions and effects shown in (6) to (9), the following (11) to (

1 3) The actions and effects shown in can be obtained.

(1 1) at the distal end of the valve body 3 0, plane 3 7 to have a first valve portion 3 6 ₃ and the second valve portion 3 6 spoon is formed. A flat surface 26 having a first valve seat 25 3 and a second valve seat 25 is formed on the valve body 20. According to such a configuration, as compared with the case where the contact portions of the valve body 20 and the valve body 30 are formed in a conical shape, it is possible to suppress the occurrence of opening failure due to the variation in the cone angle.

(1 2) The first valve section 363 and the second valve section 36 are formed as planes on the plane 37 of the valve body 30. The first valve seat 2 53 and the second valve seat 25 are formed as planes on the flat surface 26 of the valve body 20. A first valve portion 36 3 and a second valve portion 36 6 are formed on the plane of the valve body 30 with a portion corresponding to the annular groove 34 as a boundary. A first valve seat 25 3 and a second valve seat 25 are formed on a plane 26 of the valve body 20 with a portion corresponding to the annular groove 34 as a boundary. According to this structure, the first valve seat 25 3 and the second valve seat 25 are formed by the ridge line on the plane 26 of the valve body 20 and the first valve seat 25 is formed on the plane 37 of the valve body 30. compared to the case of forming the valve portion 3 6 ₃ and the second valve portion 3 6 spoon at ridgelines it becomes easy processing of the valve body 2 0 and the valve body 3 0.

(1 3) When the first valve portion 3 63 and the second valve portion 3 6 are seated on the first valve seat 2 5 3 and the second valve seat 25 5, the first valve portion 3 6 3 And the entire surface of the second valve section 36 contact the flat surface 26 of the valve body 20. According to such a configuration, the accuracy of the concentricity of the inner diameter ø 1 0 and outer diameter ø 11 of the first seat portion, and the inner diameter 0 2 0 and outer diameter 0 2 1 of the second seat portion, and the 1st sheet It becomes easy to improve the accuracy of the width of each part and the second sheet part.

[0051] <Fourth Embodiment> \¥0 2020/174898 16 卩 (: 170? 2020 /000824

Next, a fourth embodiment of the fluid ejection device 10 will be described. Hereinafter, differences from the fluid ejection device 100 of the first embodiment will be mainly described.

As shown in FIG. 9, in the fluid ejection device 10 of the present embodiment, a sack portion 27 having a hemispherical space is formed in a portion of the valve body 20 that abuts the tip end of the conical surface 24. .. A plurality of injection holes 29 are formed in the valve body 20 so as to penetrate from the inner peripheral surface of the sack portion 27 to the tip surface of the valve body 20. In this fluid injection device 10, when the valve body 30 opens, it passes through the first injection flow path \^/ 2 1 and after light oil is temporarily stored in the sack portion 27, it is It is injected from the injection hole 29.

In the fluid ejection device 10 of the present embodiment, the first ejection flow path orthogonal to the axis 1

Let the flow passage cross-sectional area of 2 1 be “3 1 ”, let the flow passage cross-sectional area of the second injection flow passage 2 2 orthogonal to the axis 1 be “3 2 ”, When the total cross-sectional area of the injection hole 29, which is the total value of the cross-sectional areas, is “3 3 ”, the cross-sectional area 33 is smaller than both the cross-sectional areas 3 1 and 3 2.

According to the fluid ejecting apparatus 10 of the present embodiment described above, it is possible to further obtain the action and effect shown in (14) below.

(1 4) If the total cross-sectional area 3 3 of the injection hole 29 is smaller than the cross-sectional area 3 1 or 3 2 of the injection flow paths 2 1 and 2 2, then 0 and light oil are the first injection flow path 2 1 When flowing into the sack part 27 through

And light oil can be temporarily stored in the sack portion 27. As a result, the pressure inside the sack portion 27 can be increased, so that it is possible to inject OO and light oil more accurately.

Next, a fifth embodiment of the fluid ejection device 10 will be described. Hereinafter, differences from the fluid ejection device 100 of the first embodiment will be mainly described.

As shown in FIG. 10, in the valve body 20 of the present embodiment, a valve body accommodation hole 21 is formed so as to penetrate the tip surface 28 of the valve body 20. The valve body 30 is accommodated in the valve body accommodation hole 21. Inner peripheral surface of valve body receiving hole 21 and valve body 30 \¥0 2020/174898 17 卩 (: 170? 2020 /000824

The gap formed between the outer peripheral surface and the outer peripheral surface constitutes the second supply channel 12 through which 0° flows. The valve body 20 has

An annular groove \^/ 14 and a supply channel \^/ 15 are formed as a flow path for supplying the gas. The annular groove \^/ 14 is formed in an annular shape on the outer peripheral surface of the valve body 20. The supply channel \^/ 15 is formed so as to connect the annular groove \^/ 14 and the second supply channel \^/ 1 2. In the fluid injection device 100 of the present embodiment, 0° is supplied from the gas fuel pump 130 to the annular groove 14. The 0° supplied to the annular groove 14 is supplied to the second supply channel \^/ 1 2 through the supply channel \^/ 15.

A conical surface 52 is formed at the opening of the valve body accommodation hole 21. The conical surface 52 is formed in a divergent shape so that the inner diameter increases toward the tip surface 28 of the valve body 20.

On the conical surface 52, an annular groove 50 formed in an annular shape centering on the axis ◯! 1 is formed. Conical surface 52 is an annular groove

It is divided into 5 1 swallows. In the following, one surface will be referred to as the “first valve seat 5 13 ”, and the other surface 5 1 will be referred to as the “second valve seat 5 1 stub”.

A plurality of first supply flow paths 11 through which light oil flows are formed in a portion of the valve body 20 that surrounds the valve body accommodation hole 21. The plurality of first supply channels 11 are formed so as to extend parallel to the axis 1. Each first supply channel \^/ 11 is communicated with the annular groove 50 through the introduction channel 5 1.

[0057] The tip portion 60 of the valve body 30 is formed in a truncated cone shape so that the outer diameter increases toward the lower side. A conical surface 61 formed on the outer circumference of the tip portion 60 faces the conical surface 52 of the valve body 20.

Next, an operation example of the fluid ejection device 10 of the present embodiment will be described.

[0058] As shown in Fig. 11, when the valve body 30 is in the closed state, the conical surface 6 1 of the valve body 30 causes the first valve seat 5 1 3 and the second valve seat 5 1 3 Seat 5 1 Seated in a swamp. Hereinafter, among the conical surface 61 of the valve body 3 0 refers to the surface in contact with the first valve seat 5 1 3 of the valve body 2 0 and the first valve portion 6 2 _3, the valve body 2 0 second valve The surface that contacts the seat 51 is called the second valve portion 62. When the valve body 30 is closed, the valve \\0 2020/174898 18 卩 (: 170? 2020 /000824

Since the gap formed between the conical surface 6 1 of the body 30 and the valve seats 5 1 3 and 5 1 of the valve body 20 is closed, the first supply flow path \^/ 1 1 The supplied light oil and 0° supplied to the second supply passage 12 are not injected.

When the drive unit 150 moves the valve body 30 downward from the state shown in FIG. 11, as shown in FIG. 10, as shown in FIG. The second valve portion 62 is separated from the first valve seat 5 1 3 and the second valve seat 51 of the valve body 20. As a result, the first injection passage \^/ 2 1 is formed between the first valve portion 6 2 3 of the valve body 30 and the first valve seat 5 13 of the valve body 20 and the valve is A second injection passage 22 is formed between the second valve portion 36 of the body 30 and the second valve seat 51 of the valve body 20. Therefore, the light oil supplied to the first supply flow path \^/ 1 1 is injected through the introduction flow path 5 1 and the first injection flow path \^/ 2 1. Further, 0° supplied to the second supply channel \^/ 12 is injected through the second injection channel 22 and the first injection channel 2 1. Therefore, light oil and

Is injected into the cylinder 100.

As described above, in the fluid ejection device 10 of the present embodiment, the first valve portion 6 of the valve body 30 is

2 3 separates from and seats against the 1st valve seat 5 1 3 of the valve body 20 so that light oil and

Both the injection and the stop of the injection are performed. In addition, the second valve portion 6 2 of the valve body 30 separates from and seats on the second valve seat 5 1 of the valve body 20,

Injection and stop of injection are performed.

According to the fluid ejecting apparatus 10 of the present embodiment described above, the same or similar action and effect as those of the fluid ejecting apparatus 10 of the first embodiment can be obtained.

Next, a sixth embodiment of the fluid ejection device 10 will be described. Hereinafter, differences from the fluid ejection device 100 of the first embodiment will be mainly described.

The fluid injection device 10 of the present embodiment is used as a urea water injection device that injects urea water into the exhaust gas for the purpose of purifying exhaust gas of the vehicle. The fluid ejecting apparatus 10 is configured to drive the valve body 30 by using fluid pressure to drive the valve body 30 instead of the drive unit 150 applying an external force to the valve body 30. Have a composition. \\0 2020/174898 19 卩 (: 170? 2020 /000824

Specifically, as shown in FIG. 12, in the valve body 30 of the present embodiment, the outer diameter of the sliding portion 63 that is a portion that slides with respect to the sliding seal portion 40 is , And is larger than the outer diameter of the intermediate portion 64 on the tip side. As a result, a step portion 65 is formed between the sliding portion 63 and the intermediate portion 64. The valve body 30 is biased toward the conical surface 24 of the valve body 20 by a spring 70 provided inside the valve body 20.

The urea water is supplied to the first supply channel 11 of the present embodiment. Air is supplied to the second supply channel \^/ 12 through the third supply channel \^/ 13 3. In the present embodiment, urea water corresponds to the first fluid, and air corresponds to the second fluid.

When the valve body 30 is closed, the pressure difference of the urea water supplied to the first supply channel \^/ 11 and the second supply channel \ Fluid pressure is applied according to the difference from the pressure of the air supplied to ^/ 12. The controller 160 controls the fluid pressure applied to the valve body 30 by controlling the pump that pumps urea water to the fluid injection device 10 and the pump that pumps air to the fluid injection device 10. Adjust the urea water pressure and the air pressure so that they are larger than the urging force of the pulling 70. Since the fluid pressure applied to the valve body 30 becomes larger than the biasing force of the spring 70, the valve body 30 performs a riffing action against the biasing force of the spring 70 and the valve body 30 opens. Speak.

As in the fluid ejecting apparatus 10 of the present embodiment described above, if the valve body 30 is lifted by using the pressures of two kinds of fluids used in the fluid ejecting apparatus 10, Since the drive unit 150 is not required, the structure can be simplified.

In addition, each embodiment can also be implemented in the following forms.

In the first and second embodiments, the annular groove 34 is the conical surface of the valve body 30.

3 5 and at least one of the conical surfaces 24 of the valve body 20 \¥0 2020/174898 20 卩 (: 170? 2020 /000824

Yes. Further, in the third embodiment, the annular groove 34 may be formed on at least one of the plane 37 of the valve body 30 and the plane 26 of the valve body 20. The same applies to other embodiments.

[0067] In diesel engines, the injection pressure of light oil, which is fuel, is increasing more and more with the aim of reducing carbon dioxide and reducing emissions, and it is now over 250 [1\/1 3]. ing. Therefore, it is necessary to improve the pressure resistance of each part of the fuel injection device, and there is a problem that the work of the pump for pressurizing the light oil also becomes large. It is effective to use the fluid injection device 10 of each embodiment as a fuel injection device for injecting light oil in such a diesel engine. Specifically, the fluid injection device 10 of each embodiment is configured to inject light oil and air. As a result, the pressure of air can be utilized to atomize and inject light oil, which makes it possible to solve the above-mentioned problems of diesel engines. If air is used as the gas used in the fluid ejecting apparatus 10, the gas is not combustible, so it is not necessary to consider the leakage of combustible substances in the pump or the like. Therefore, the structure of the pump can be simplified. Also, a tank for storing gas is not required.

[0068] In a gasoline engine, the injection pressure of gasoline, which is a fuel, has been increasing more and more with the aim of reducing carbon dioxide and reducing emissions, and now it is more than ₃₀ [1\/1 ₃ ]. .. Therefore, it is necessary to improve the pressure resistance of each part of the fuel injection device, and there is a problem that the work of the pump for boosting the gasoline becomes large. It is effective to use the fluid injection device 10 of each embodiment as a fuel injection device that injects gasoline in such a gasoline engine. Specifically, the fluid ejection device 10 of each embodiment is configured to inject gas and air. As a result, the pressure of the air can be used to atomize and inject gasoline, which makes it possible to solve the problems of the gasoline engine described above. If air is used as the gas used in the fluid ejecting apparatus 10, the gas is not combustible, so it is not necessary to consider the leakage of combustible substances in the pump or the like. Therefore, the pump structure can be simplified. \\0 2020/174898 21 卩 (: 170? 2020 /000824

Can be categorized. Also, a tank for storing gas is not required.

When injecting liquid fuel and air from the fluid injection device 10, the injection pressure applied to the air may be set to a constant pressure. Specifically, the controller 160 controls the air pump so that the injection pressure applied to the air is constant. Further, the controller 160 controls the pump for liquid fuel to perform pressure control for adjusting the pressure for injection applied to the liquid fuel. Further, the controller 160 controls the drive unit 150 to execute drive control for adjusting the lift amount and valve opening time of the valve body 30. The controller 160 controls the injection amounts of air and liquid fuel through the pressure control of the liquid fuel and the drive control of the valve body 30. According to such a configuration, the configuration for controlling the pressure of air is not necessary, so that the gas fuel pump 130 can be simplified.

[0070] The two types of fluids used in the fluid ejection device 10 of each embodiment can be changed as appropriate. For example, propane gas (I-0) or the like may be used as the combustible gas. When propane gas is used, it is compressed to about 1 [IV! 3] and supplied to the fluid ejecting apparatus 10 so that the propane gas is in a liquid state inside the fluid ejecting apparatus 10. May exist in. That is, the gas used in the fluid ejection device 10 includes a fluid that is a gas at room temperature and atmospheric pressure.

[0071] The controller 160 and its control method described in the present disclosure are provided by configuring a processor and a memory programmed to perform one or more functions embodied by a computer program. It may be realized by one or more dedicated computers. The controller 160 and its control method described in the present disclosure may be realized by a dedicated computer provided by configuring a processor including one or more dedicated hardware logic circuits. A controller 160 and control method thereof described in this disclosure provides a processor and memory programmed to perform one or more functions and a processor including one or more hardware logic circuits. \¥0 2020/174898 22 卩 (: 170? 2020 /000824

It may be realized by one or more dedicated computers configured by combination. The computer program may be stored in a computer-readable non-transition tangible recording medium as instructions executed by the computer. The dedicated hardware logic circuit and the hardware logic circuit may be realized by a digital circuit including a plurality of logic circuits or an analog circuit.

The present disclosure is not limited to the above specific examples. Those obtained by those skilled in the art who have made appropriate design changes to the above specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. The elements included in each of the above-described specific examples, and the arrangement, conditions, shapes, and the like of the elements are not limited to those illustrated, but can be appropriately changed. The respective elements included in the above-described specific examples can be appropriately combined as long as no technical contradiction occurs.

Claims

\¥0 2020/174898 23 卩(: 170? 2020/000824 Claims

[Claim 1] First valve seat

5 1 3) and a valve body (2 0) having a second valve seat (2 5 claws, 5 1 claws),

A first valve portion (3 6 3, 6 2 ₃ ) that is arranged so as to face both the first valve seat and the second valve seat, and is separated from and seated on the first valve seat.

, And the second valve part (36 cm, which is separated from and seated on the second valve seat).

6 2) and a valve body (30) having

With the displacement of the valve body, the first valve portion and the second valve portion are integrally displaced,

By injecting and stopping the injection of both the first fluid and the second fluid by separating and seating the first valve portion with respect to the first valve seat, the second valve portion is operated by the second valve portion. By separating from and seating on the valve seat, injection and stop of the injection of the second fluid are performed.

Fluid ejection device.

[Claim 2] A flow path formed by separating the first valve portion from the first valve seat is defined as a first injection flow path (\^/21),

When the flow path formed by separating the second valve portion from the second valve seat is the second injection flow path (\^/22),

When the first valve portion and the second valve portion are separated from the first valve seat and the second valve seat, the first fluid flows in the first injection flow path and the second injection flow path. Of which, only the first injection flow path is injected and the second fluid is injected both the first injection flow path and the second injection flow path.

The fluid ejection device according to claim 1.

[Claim 3] The valve body is formed with an introduction flow path (31 to 33) for introducing the first fluid into the first injection flow path.

The fluid ejection device according to claim 2.

[Claim 4] The first valve portion and the second valve portion are coaxially arranged at the tip of the valve body. \\0 2020/174898 24 卩 (: 170? 2020 /000824

The same conical surface with (3 5, 6 1) is formed,

The valve body is formed with the same conical surface (2 4, 5 2) having the first valve seat and the second valve seat coaxially.

The fluid ejection device according to claim 2 or 3.

[Claim 5] The first valve portion and the second valve portion are formed as surfaces on a conical surface of the valve body,

The first valve seat and the second valve seat are formed as a surface on a conical surface of the valve body,

An annular groove (3 4, 50) is formed on at least one of the conical surface of the valve body and the conical surface of the valve body,

On the conical surface of the valve body, the first valve portion and the second valve portion are formed with a portion corresponding to the annular groove as a boundary.

On the conical surface of the valve body, the first valve seat and the second valve seat are formed with a portion corresponding to the annular groove as a boundary.

The fluid ejection device according to claim 4.

[Claim 6] When the first valve portion and the second valve portion are seated on the first valve seat and the second valve seat, the entire surface of the first valve portion and the entire surface of the second valve portion are Touches the conical surface of the valve body

The fluid ejection device according to claim 4 or 5.

[Claim 7] A flat surface (37) having the first valve portion and the second valve portion is formed at a tip end portion of the valve body,

The valve body has a flat surface (26) having the first valve seat and the second valve seat.

The fluid ejection device according to claim 2 or 3.

[Claim 8] The first valve portion and the second valve portion are formed as surfaces on a plane of the valve body,

The first valve seat and the second valve seat are formed as surfaces on a plane of the valve body, \¥0 2020/174898 25 卩 (: 170? 2020 /000824

An annular groove (34) is formed in at least one of the plane of the valve body and the plane of the valve body,

On the plane of the valve body, the first valve portion and the second valve portion are formed with a portion corresponding to the annular groove as a boundary,

On the plane of the valve body, the first valve seat and the second valve seat are formed with a portion corresponding to the annular groove as a boundary.

The fluid ejection device according to claim 7.

[Claim 9] When the first valve portion and the second valve portion are seated on the first valve seat and the second valve seat, the entire surface of the first valve portion and the entire surface of the second valve portion are Touches the plane of the valve body

9. The fluid ejection device according to claim 7 or 8.

[Claim 10] When the flow passage for introducing the first fluid into the first injection flow passage is defined as an introduction flow passage (3 1 to 33 ),

A throttle portion (33) for adjusting the flow rate of the first fluid introduced into the first injection passage is formed in the introduction passage.

The fluid ejection device according to any one of claims 2 to 9.

[Claim 11] A flow path formed by separating the first valve portion from the first valve seat is defined as a first injection flow path,

When the flow path formed by separating the second valve portion from the second valve seat is the second injection flow path,

The total cross-sectional area of the injection hole (29) for injecting the first fluid and the second fluid to the outside is equal to the flow passage cross-sectional area of the first injection flow passage and the flow passage cross-sectional area of the second injection flow passage. Less than any

The fluid ejection device according to any one of claims 2 to 10.

12. The injection pressure applied to the first fluid and the injection pressure applied to the second fluid are set to the same pressure. The fluid ejection device according to any one of claims.

[Claim 13] The pressure of the second fluid is higher than the pressure for jetting applied to the first fluid. \¥0 2020/174898 26 卩 (: 170? 2020 /000824

Higher pressure for injection applied to the

The fluid ejection device according to any one of claims 2 to 11.

[Claim 14] The pressure for injection applied to the first fluid is set to zero.

The fluid ejection device according to claim 13.

[Claim 15] The first fluid is a liquid,

The second fluid is a gas

The fluid ejection device according to any one of claims 2 to 14.

[Claim 16] The first fluid is a liquid,

The second fluid is a gas,

The jetting pressure applied to the liquid is higher than the jetting pressure applied to the gas

The fluid ejection device according to any one of claims 2 to 11.

[Claim 17] The gas is air

The fluid ejection device according to claim 15 or 16.

[Claim 18] The pressure applied to the gas for injection is set to a constant pressure,

Pressure control for adjusting the pressure for injection applied to the liquid, and a control unit (160) for controlling the injection amount of each of the gas and the liquid by drive control of the valve body.

The fluid ejection device according to any one of claims 15 to 17.

[Claim 19] A flammable gas is used as the gas,

A control unit that controls the injection amount of the combustible gas by controlling the drive of the valve element and controls the injection amount of the liquid by pressure control that adjusts the pressure for the injection applied to the liquid. The fluid ejection device according to claim 15 or 16, further comprising: