Fuel injector, engine and vehicle

Abstract

The utility model discloses a fuel injector, engine and vehicle, relates to fuel injector technical field, fuel injector includes valve body, spool, valve seat and connecting piece, valve body along the first direction is equipped with valve chamber and with the installation chamber of valve chamber intercommunication, installation chamber has located the first chamber wall of installation chamber and valve chamber intercommunication, and the first chamber wall is equipped with the second chamber wall of installation chamber and valve chamber intercommunication. The valve element is arranged in the valve cavity, the valve seat is arranged in the mounting cavity, the valve seat is provided with a valve port matched with the valve element, the connecting piece is detachably connected with the valve body, in the first direction, the two opposite ends of the valve seat abut against the first cavity wall and the connecting piece respectively, and the valve seat is detachably connected to the mounting cavity through the connecting piece; according to the technical scheme, the service life of the whole fuel injector is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injectors, in particular to a fuel injector, an engine and a vehicle. Background Art

[0002] The vehicle includes an engine that provides driving power for the vehicle, and the engine includes a fuel injector. The fuel injector can be used to inject fuel into the intake duct of the engine, and can also be used to perform direct injection into the cylinder of the engine. The fuel injected by the fuel injector can be but is not limited to gasoline, diesel, and clean fuel, and the clean fuel can be configured as any one of methanol, natural gas, hydrogen, ammonia and other alcohols, ethers and carbon neutral fuels.

[0003] Currently, fuel injectors have an overall short service life. Utility Model Content

[0004] The main purpose of the utility model is to provide a fuel injector, an engine and a vehicle, aiming to prolong the service life of the entire fuel injector.

[0005] To achieve the above-mentioned purpose, the fuel injector proposed by the utility model comprises:

[0006] A valve body, wherein a valve cavity and an installation cavity communicating with the valve cavity are sequentially provided along a first direction, wherein the installation cavity has a first cavity wall located at a position where the installation cavity communicates with the valve cavity;

[0007] A valve core, disposed in the valve cavity;

[0008] A valve seat is arranged in the installation cavity, and the valve seat is provided with a valve port matched with the valve core; and

[0009] A connecting piece is detachably connected to the valve body. In the first direction, opposite ends of the valve seat respectively abut against the first cavity wall and the connecting piece. The valve seat is detachably connected to the installation cavity through the connecting piece.

[0010] In one embodiment, the connecting member is connected to the valve body via threads.

[0011] In one embodiment, the valve body is provided with an external threaded portion, the connecting piece is provided with an internal threaded portion, the connecting piece and the valve body are connected via the external threaded portion and the internal threaded portion, and the connecting piece is provided with an avoidance hole opposite to the valve port in the first direction.

[0012] In one embodiment, the connecting member is provided with an inner flange connected to the periphery of the internal threaded portion, the inner flange is provided with the avoidance hole, and the end of the valve seat away from the valve cavity has a first end face, and the first end face is face-to-face sealed against the side of the inner flange facing the installation cavity.

[0013] In one embodiment, the valve seat has a second end surface at one end close to the valve cavity, and the second end surface is in surface-to-surface contact and sealing with a side surface of the first cavity wall close to the connecting member.

[0014] In one embodiment, a mounting ring groove is provided on the outer circumferential surface of the valve seat, and a sealing ring is provided on the mounting ring groove. The sealing ring is used to abut against the inner circumferential surface of the mounting cavity.

[0015] In one embodiment, the sealing ring is made of rubber.

[0016] In one embodiment, the valve seat is provided with a spray hole plate opposite to the valve port, and the spray hole plate is provided with a plurality of spray holes.

[0017] In one embodiment, the orifice plate and the valve seat are coaxially arranged, a first positioning mark structure is provided at one end of the valve seat away from the valve cavity, a second positioning mark structure is provided at the periphery of the cavity opening of the installation cavity away from the valve cavity, and a connecting line between the first positioning mark structure and the second positioning mark structure passes through a central axis of the valve seat extending along a first direction.

[0018] In one embodiment, the first positioning mark structure is configured as a first positioning mark groove;

[0019] And / or, the second positioning mark structure is configured as a second positioning mark groove.

[0020] In one embodiment, the outer peripheral surface of the valve seat is interference fit with the installation cavity, and at least one pair of clamping surfaces is provided at one end of the valve seat away from the valve cavity, and the clamping surfaces are arranged parallel to the central axis of the valve seat.

[0021] The utility model also provides an engine, which comprises the above-mentioned fuel injector.

[0022] In one embodiment, the engine is configured as a methanol engine.

[0023] The utility model also provides a vehicle, which comprises the aforementioned engine.

[0024] We have found that the valve seat of the fuel injector is particularly easy to be damaged. In the technical solution of the utility model, once the valve seat is damaged, the user can disassemble the connecting piece from the valve body to facilitate the removal of the damaged valve seat from the installation cavity, so that the new valve seat can be installed in the installation cavity through the connecting piece. In this way, the service life of the fuel injector as a whole is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A cross-sectional view of an embodiment of a fuel injector provided by the utility model, wherein the section plane of the cross-sectional view passes through the central axis of the valve seat;

[0027] Figure 2 for Figure 1 A partial enlarged view of the fuel injector;

[0028] Figure 3 for Figure 1 Schematic diagram of the structure of the middle valve body;

[0029] Figure 4 for Figure 1 A perspective view of the center valve seat and orifice plate;

[0030] Figure 5 for Figure 1 Assembly drawing of valve body and valve seat;

[0031] Figure 6 for Figure 1 The structural diagram of the connecting parts;

[0032] Figure 7 for Figure 1 a cross-sectional view of a fuel injector;

[0033] Figure 8 for Figure 7 A partial enlarged view of the structure.

[0034] Description of Figure Numbers:

[0035] 100, fuel injector; 200, valve body; 210, valve cavity; 220, mounting cavity; 221, first cavity wall; 230, external threaded portion; 240, second positioning mark structure; 300, valve core; 400, valve seat; 410, valve port; 420, first end face; 421, first positioning mark structure; 430, second end face; 440, mounting ring groove; 450, clamping surface; 500, connecting piece; 510, internal threaded portion; 520, inner flange; 521, avoidance hole; 600, sealing ring; 700, spray hole plate; 710, spray hole; 720, first spray hole group; 730, second spray hole group.

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] The vehicle includes an engine that provides driving power for the vehicle, and the engine includes a fuel injector. The fuel injector can be used to inject fuel into the intake duct of the engine, and can also be used to perform direct injection into the cylinder of the engine. The fuel injected by the fuel injector can be but is not limited to gasoline, diesel, and clean fuel, and the clean fuel can be configured as any one of methanol, natural gas, hydrogen, ammonia and other alcohols, ethers and carbon neutral fuels.

[0041] Currently, the valve seat of the fuel injector is easily damaged, resulting in a shorter service life of the fuel injector as a whole.

[0042] It is worth mentioning that the physical and chemical properties of clean fuel are different from those of gasoline and diesel. When the fuel injector sprays clean fuel, the valve seat of the fuel injector is more easily damaged, resulting in a shorter overall service life of the fuel injector.

[0043] Therefore, the utility model proposes a fuel injector, which aims to extend the service life of the fuel injector as a whole. The fuel injected by the fuel injector may be, but is not limited to, gasoline, diesel and clean fuel.

[0044] See also Figures 1 to 6 In one embodiment of the present invention, the fuel injector 100 includes a valve body 200 , a valve core 300 , a valve seat 400 , and a connecting member 500 .

[0045] The valve body 200 is provided with a valve cavity 210 and an installation cavity 220 communicating with the valve cavity 210 in sequence along a first direction, and the installation cavity 220 has a first cavity wall 221 located at the place where the installation cavity 220 communicates with the valve cavity 210. The valve core 300 is provided in the valve cavity 210. The valve seat 400 is provided in the installation cavity 220, and the valve seat 400 is provided with a valve port 410 matched with the valve core 300. It can be understood that the valve core 300 is used to control the opening of the valve port 410, and the fuel in the valve cavity 210 can be sprayed out from the valve port 410. The connecting member 500 is detachably connected to the valve body 200. In the first direction, the opposite ends of the valve seat 400 abut against the first cavity wall 221 and the connecting member 500 respectively, and the valve seat 400 is detachably connected to the installation cavity 220 through the connecting member 500. Thus, once the valve seat 400 is damaged, the user can disassemble the connector 500 from the valve body 200 to remove the damaged valve seat 400 from the mounting cavity 220, so that a new valve seat 400 can be installed in the mounting cavity 220 through the connector 500. Thus, the service life of the entire fuel injector 100 is extended.

[0046] There are many ways to detachably connect the connector 500 and the valve body 200. In one embodiment, the connector 500 is connected to the valve body 200 by threads. This is conducive to a stable connection between the connector 500 and the valve body 200. In some alternative embodiments, the connector 500 is clamped to the valve body 200.

[0047] There are many types of structural forms in which the connecting member 500 is connected to the valve body 200 by threading. In one embodiment, the valve body 200 is provided with an external threaded portion 230, and the connecting member 500 is provided with an internal threaded portion 510. The connecting member 500 and the valve body 200 are connected by the external threaded portion 230 and the internal threaded portion 510. In addition, the connecting member 500 is provided with an avoidance hole 521 opposite to the valve port 410 in the first direction, and the avoidance hole 521 can avoid the fuel injected from the valve port 410. Figure 2, the installation cavity 220 extends along the first direction, and the outer peripheral surface of the installation cavity 220 is provided with an external threaded portion 230. It should be pointed out that the illustrated embodiment is only exemplary, and the external threaded portion 230 can also be provided on the outer peripheral surface of the valve cavity 210. In some alternative embodiments, the valve body 200 can also be provided with an internal threaded portion 510, and the connecting member 500 can be provided with an external threaded portion 230, and the connecting member 500 and the valve body 200 are connected through the external threaded portion 230 and the internal threaded portion 510, and the connecting member 500 is provided with an avoidance hole 521 opposite to the valve port 410 in the first direction.

[0048] In one embodiment, the connector 500 is provided with an inner flange 520 connected to the periphery of the internal threaded portion 510, and the inner flange 520 is provided with an avoidance hole 521. The end of the valve seat 400 away from the valve cavity 210 has a first end surface 420, and the first end surface 420 and the side surface of the inner flange 520 facing the installation cavity 220 are in face-to-face contact and sealed. Figure 2 Thus, the inner flange 520 and the internal threaded portion 510 together restrict the fuel from flowing out of the fuel injector 100 from the gap between the valve seat 400 and the mounting cavity 220. It is worth mentioning that the inner flange 520 not only restricts the valve seat 400 from being separated from the mounting cavity 220, making the valve seat 400 less likely to vibrate, but also reduces fuel leakage.

[0049] In one embodiment, the valve seat 400 has a second end surface 430 at one end close to the valve cavity 210, and the second end surface 430 is in face-to-face contact and sealed with the side surface of the first cavity wall 221 close to the connecting member 500. In this way, the gap between the outer circumference of the valve seat 400 and the inner circumference of the installation cavity 220 can be reduced, which is conducive to reducing fuel leakage.

[0050] In one embodiment, the outer circumference of the valve seat 400 is provided with a mounting annular groove 440, and the mounting annular groove 440 is provided with a sealing ring 600, and the sealing ring 600 is used to abut against the inner circumference of the mounting cavity 220. In this way, the fuel can be reduced from flowing out of the fuel injector 100 through the gap between the outer circumference of the valve seat 400 and the inner circumference of the mounting cavity 220.

[0051] In one embodiment, the material of the sealing ring 600 is rubber. In some alternative embodiments, the material of the sealing ring 600 can also be other materials, which are not limited here, as long as the sealing ring 600 has elasticity.

[0052] In one embodiment, the valve seat 400 is provided with a spray hole plate 700 opposite to the valve port 410, and the spray hole plate 700 is provided with a plurality of spray holes 710, so that the fuel sprayed from the valve port 410 is atomized through the spray holes 710, which is beneficial to improve the combustion efficiency of the engine.

[0053] Reference Figure 7 and Figure 8In one embodiment, the orifice plate 700 and the valve seat 400 are coaxially arranged, a first positioning mark structure 421 is provided at one end of the valve seat 400 away from the valve cavity 210, a second positioning mark structure 240 is provided at the periphery of the cavity opening of the installation cavity 220 away from the valve cavity 210, and the connecting line of the first positioning mark structure 421 and the second positioning mark structure 240 passes through the central axis of the valve seat 400 extending along the first direction. In this way, the positions of the multiple orifices 710 are unique, avoiding the position deviation of the orifices 710 caused by the user when installing the valve seat 400, so that the injector can maintain a good injection effect after being installed on the engine. Reference Figure 7 A plurality of spray holes 710 are divided into a first spray hole group 720 and a second spray hole group 730. The first spray hole group and the second spray hole group 730 are symmetrical about a radial axis of the spray hole plate 700. The radial axis passes through the central circumference of the valve seat 400 extending along the first direction. The first positioning mark structure 421 and the second positioning mark structure 240 can ensure that the positions of the first spray hole group 720 and the second spray hole group 730 are correct.

[0054] In one embodiment, the first positioning mark structure 421 is configured as a first positioning mark groove. In this way, the first positioning mark structure 421 is easy to process. In one embodiment, the second positioning mark structure 240 is configured as a second positioning mark groove. In this way, the second positioning mark structure 240 is easy to process. In some embodiments, the first positioning mark structure 421 is configured as a first positioning mark groove, and the second positioning mark structure 240 is configured as a second positioning mark groove. The extension direction of the first positioning groove passes through the central axis of the valve seat 400 extending along the first direction, and the extension direction of the second positioning groove passes through the central axis of the valve seat 400 extending along the first direction. In this way, it is convenient for the user to align the first positioning groove and the second positioning groove when installing the valve seat 400. In some alternative embodiments, the first positioning mark structure 421 is configured as a first positioning mark protrusion, and / or the second positioning mark structure 240 is configured as a second positioning mark protrusion.

[0055] In one embodiment, the outer circumference of the valve seat 400 is interference fit with the installation cavity 220, and at least one pair of clamping surfaces 450 is provided at one end of the valve seat 400 away from the valve cavity 210, and the clamping surfaces 450 are arranged parallel to the central axis of the valve seat 400. In this way, the user can use a tool to clamp the clamping surfaces 450, so that it is easier to put the valve seat 400 into the installation cavity 220. Figure 4 The outer peripheral surface of one end of the valve seat 400 for contacting with the connecting member 500 is provided with a plurality of pairs of clamping surfaces 450, referring to Figure 2When the two opposite ends of the valve seat 400 in the first direction respectively abut against the first cavity wall 221 and the connecting piece 500, the clamping surface 450 is located outside the installation cavity 220. In this way, when the user uses a tool to send the valve seat 400 into the installation cavity 220, the clamping tool is not likely to interfere with the valve body 200.

[0056] The utility model also proposes an engine, which includes the aforementioned fuel injector 100. The specific structure of the fuel injector 100 refers to the above-mentioned embodiment. Since the present engine adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0057] In one embodiment, the engine is configured as a methanol engine. In some alternative embodiments, the engine is configured as a gasoline engine, a diesel engine or other clean fuel engines.

[0058] The utility model also proposes a vehicle, which includes the aforementioned engine. The specific structure of the engine refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0059] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fuel injector, characterized in that: include A valve body, wherein a valve cavity and an installation cavity communicating with the valve cavity are sequentially provided along a first direction, wherein the installation cavity has a first cavity wall located at a position where the installation cavity communicates with the valve cavity; A valve core, disposed in the valve cavity; A valve seat, arranged in the installation cavity, the valve seat being provided with a valve port matched with the valve core; as well as A connecting piece is detachably connected to the valve body. In the first direction, opposite ends of the valve seat respectively abut against the first cavity wall and the connecting piece. The valve seat is detachably connected to the installation cavity through the connecting piece.

2. The fuel injector according to claim 1, characterized in that The connecting piece is connected to the valve body via threads.

3. The fuel injector according to claim 2, characterized in that The valve body is provided with an external threaded portion, the connecting piece is provided with an internal threaded portion, the connecting piece and the valve body are connected via the external threaded portion and the internal threaded portion, and the connecting piece is provided with an avoidance hole opposite to the valve port in the first direction.

4. The fuel injector according to claim 3, characterized in that The connecting piece is provided with an inner flange connected to the periphery of the internal threaded portion, the inner flange is provided with the avoidance hole, and the end of the valve seat away from the valve cavity has a first end face, and the first end face is face-to-face abutted and sealed with the side of the inner flange facing the installation cavity.

5. The fuel injector according to any one of claims 1 to 4, characterized in that: The valve seat has a second end surface at one end close to the valve cavity, and the second end surface is in face-to-face contact and sealed with the side surface of the first cavity wall close to the connecting member.

6. The fuel injector according to any one of claims 1 to 4, characterized in that: The outer circumferential surface of the valve seat is provided with a mounting ring groove, and the mounting ring groove is provided with a sealing ring, and the sealing ring is used to abut against the inner circumferential surface of the mounting cavity.

7. The fuel injector according to claim 6, characterized in that The sealing ring is made of rubber.

8. The fuel injector according to any one of claims 1 to 4, characterized in that: The valve seat is provided with a spray hole plate opposite to the valve port, and the spray hole plate is provided with a plurality of spray holes.

9. The fuel injector according to claim 8, characterized in that The orifice plate and the valve seat are coaxially arranged, a first positioning mark structure is provided at one end of the valve seat away from the valve cavity, a second positioning mark structure is provided at the periphery of the cavity opening of the installation cavity away from the valve cavity, and a connecting line of the first positioning mark structure and the second positioning mark structure passes through a central axis of the valve seat extending along a first direction.

10. The fuel injector according to claim 9, characterized in that The first positioning mark structure is configured as a first positioning mark groove; And / or, the second positioning mark structure is configured as a second positioning mark groove.

11. The fuel injector according to claim 1, characterized in that The outer peripheral surface of the valve seat is interference fit with the installation cavity, and at least one pair of clamping surfaces is provided at one end of the valve seat away from the valve cavity, and the clamping surfaces are arranged in parallel with the central axis of the valve seat.

12. An engine, characterized in that: Comprising a fuel injector as claimed in any one of claims 1 to 11.

13. The engine according to claim 12, characterized in that The engine is configured as a methanol engine.

14. A vehicle, characterized in that: Comprising an engine as claimed in claim 12 or 13.

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