An oil injector, an internal combustion engine fuel system, and a vehicle

Abstract

The utility model discloses a kind of oil atomizer, internal combustion engine fuel system and vehicle, oil atomizer includes: oil atomizer main body, armature seat, electromagnetic assembly and control valve, oil atomizer main body has first oil inlet oil channel and first oil return oil channel, armature seat has the second oil inlet oil channel with first oil inlet oil channel intercommunication and the movable armature;The adsorption of electromagnetic assembly to armature is adjustable;Control valve has the third oil inlet oil channel with second oil inlet oil channel intercommunication and the second oil return oil channel with first oil return oil channel through armature can be on-off intercommunication;Nozzle assembly is provided with the nozzle outlet of on-off, nozzle assembly has first oil chamber and second oil chamber, first oil chamber intercommunication second oil return oil channel with third oil inlet oil channel, second oil chamber intercommunication first oil chamber with nozzle outlet, the pressure of first oil chamber is less than the pressure of second oil chamber, nozzle outlet is conducted. The pressure of first oil chamber is changed by intercommunication with oil tank, the regulation of nozzle outlet size is realized, and the control of oil injection is further realized.

Description

Technical Field

[0001] This utility model relates to the technical field of internal combustion engines, and in particular to a fuel injector, an internal combustion engine fuel system, and a vehicle. Background Technology

[0002] As the core component of the internal combustion engine fuel system, the function of the fuel injector is to receive pulse signals from the ECU and inject fuel according to the engine's operating conditions. Utility Model Content

[0003] In view of this, the present invention provides a fuel injector to achieve fuel injection control. Furthermore, the present invention also provides an internal combustion engine fuel system and a vehicle having the aforementioned fuel injector.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An injector, comprising:

[0006] The injector body has one end connected to a high-pressure fuel pump along its axial direction, and the injector body has a first inlet oil passage and a first return oil passage.

[0007] An armature holder is connected to the other end of the injector body along the axial direction, and the armature holder has a second oil inlet passage and an armature channel, the second oil inlet passage being connected to the first oil inlet passage; the armature channel is provided with an armature that can move along the axial direction of the injector body; an electromagnetic component is disposed inside the injector body and is used to attract the armature to move, and the attraction force of the electromagnetic component on the armature is adjustable;

[0008] A control valve is connected to the armature seat on the side away from the injector body. The control valve has a third oil inlet passage and a second oil return passage. The third oil inlet passage is connected to the second oil inlet passage, and the second oil return passage is connected to the first oil return passage through the armature.

[0009] A nozzle assembly is provided on the side of the control valve away from the armature seat. The side of the nozzle assembly away from the control valve has a switchable nozzle outlet. The nozzle assembly has a first oil chamber and a second oil chamber. The first oil chamber is connected to the second return oil passage and the third inlet oil passage. The second oil chamber is connected to the first oil chamber and the nozzle outlet. When the pressure in the first oil chamber is less than the pressure in the second oil chamber, the nozzle outlet is open.

[0010] Preferably, in the above-described injector, the nozzle assembly includes:

[0011] The needle valve body is connected to the side of the control valve away from the armature seat, and the nozzle outlet is provided on the side of the needle valve body away from the control valve.

[0012] A needle valve core is disposed within the needle valve body and is movable along the axial direction of the needle valve body, and is capable of blocking the nozzle outlet; a second oil chamber is provided between the needle valve core and the needle valve body;

[0013] A guide sleeve is sleeved on the outer side of the end of the needle valve core away from the nozzle outlet, and the first oil cavity is formed between the guide sleeve and the needle valve core.

[0014] Preferably, the injector described above further includes an adjusting shim, which is located at the end of the needle valve core near the control valve. A third oil chamber is provided between the adjusting shim and the needle valve core, and the first oil chamber, the second return oil passage, and the second oil chamber are all connected to the third oil chamber.

[0015] Preferably, in the above-mentioned injector, the adjusting shim has a shim channel, which connects the second return oil passage and the third oil chamber.

[0016] Preferably, in the above-mentioned injector, the inner wall of the guide sleeve has a stepped structure, and the adjusting shim is positioned between the stepped structure and the control valve along the axial direction of the guide sleeve.

[0017] Preferably, in the above-described injector, the size of the adjusting shim along the axial direction of the needle valve core is adjustable.

[0018] Preferably, in the above-mentioned injector, the armature isolates the second return oil passage from the first return oil passage by a sealing bead.

[0019] Preferably, in the above-mentioned injector, the electromagnetic component includes a valve stem, an electromagnetic coil, a fixed magnet, and a return spring;

[0020] The valve stem is equipped with the electromagnetic coil and the fixed magnet. When the electromagnetic coil is energized, the fixed magnet can attract the armature and move the armature away from the control valve. One end of the return spring abuts against the valve stem, and the other end abuts against the armature.

[0021] An internal combustion engine fuel system, comprising the injector described in any of the preceding claims.

[0022] A vehicle comprising the aforementioned internal combustion engine fuel system.

[0023] This invention discloses a fuel injector that uses an electromagnetic component to adjust the position of the armature, thereby changing the opening of the second return oil passage and adjusting the pressure of the first oil chamber. This creates a pressure difference between the first and second oil chambers, thus adjusting the nozzle outlet opening. In other words, by changing the pressure of the first oil chamber through communication with the fuel tank, the on / off state of the nozzle outlet is adjusted, achieving fuel injection control. The fuel injector, as described above, has a simple structure and is easy to manufacture. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front sectional view of the fuel injector disclosed in an embodiment of this utility model;

[0026] Figure 2 This is a partial structural cross-sectional view of the fuel injector disclosed in an embodiment of the present utility model;

[0027] Figure 3 This is another partial structural cross-sectional view of the injector disclosed in this embodiment of the utility model;

[0028] Figure 4 This is a front sectional view of the fuel injector disclosed in an embodiment of the present utility model. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0031] As the core component of the internal combustion engine fuel system, the fuel injector's function is to receive pulse signals from the ECU and inject fuel at a fixed time, quantity, and pressure according to the engine's operating conditions.

[0032] Based on the above-mentioned technical problems, this application discloses an injector that can realize the injection control of the injector and has a simple structure.

[0033] like Figure 1 As shown, the injector disclosed in this application includes: injector body 1, electromagnetic assembly, armature seat 3, control valve 4, nozzle assembly 100 and clamping sleeving 5.

[0034] The injector body 1, armature seat 3, control valve 4, and nozzle assembly 100 are arranged sequentially along the axial direction of the injector body 1. Optionally, one end of the injector body 1 along the axial direction is threadedly connected to the clamping sleeve 5. Specifically, the clamping sleeve 5 is sleeved on the outside of the injector body 1 and threadedly connected to it. The armature seat 3, control valve 4, and nozzle assembly 100 are axially limited between the clamping sleeve 5 and the injector body 1. In this paper, the injector body 1, electromagnetic assembly, armature seat 3, control valve 4, nozzle assembly 100, and clamping sleeve 5 have the same axial direction.

[0035] The other end of the injector body 1 along the axial direction is connected to the high-pressure fuel pump. The injector body 1 has a first fuel inlet passage 11, which is connected to the high-pressure fuel pump, so that the fuel from the high-pressure fuel pump enters the injector through the first fuel inlet passage 11.

[0036] The direction of the first oil inlet channel 11 can be set according to different needs, and all are within the protection range. In the embodiments of this application, the first oil inlet channel 11 can be arranged at an angle relative to the axis of the injector body 1, and the angle of inclination of the first oil inlet channel 11 relative to the axis of the injector body 1 is not specifically limited.

[0037] The armature seat 3 is, but is not limited to, a cylindrical structure, and has a second oil inlet channel 31 and an armature channel.

[0038] The second oil inlet passage 31 is connected to the first oil inlet passage 11. Optionally, the inlet of the second oil inlet passage 31 is positioned opposite to the outlet of the first oil inlet passage 11, thus connecting the two passages. It should be noted that the inlet of the second oil inlet passage 31 is the end of the second oil inlet passage 31 closest to the injector body 1, and the outlet of the first oil inlet passage 11 is the end of the first oil inlet passage 11 closest to the armature seat 3.

[0039] In some embodiments, the second oil inlet passage 31 is arranged at an angle relative to the axis of the armature seat 3. Optionally, the angle of inclination of the second oil inlet passage 31 relative to the axis of the injector body 1 is greater than the angle of inclination of the first oil inlet passage 11 relative to the axis of the injector body 1. The angle of inclination of the second oil inlet passage 31 is not specifically limited here.

[0040] It should be noted that setting both the first oil inlet channel 11 and the second oil inlet channel 31 as inclined channels can increase the length of the oil circuit.

[0041] An armature 32 is provided in the armature channel described above, and the armature 32 can move along the axis of the injector body 1. The movement of the armature 32 can adjust the opening of the control valve 4. In this embodiment, the movement of the armature 32 is achieved using an electromagnetic component.

[0042] The electromagnetic component disclosed in this application is disposed inside the injector body 1 and is moved by the electromagnetic adsorption armature 32.

[0043] The control valve 4 has a third oil inlet passage 41 and a second oil return passage 42.

[0044] The third oil inlet passage 41 is connected to the second oil inlet passage 31. Optionally, the inlet of the third oil inlet passage 41 and the outlet of the second oil inlet passage 31 are arranged opposite to each other, so that the third oil inlet passage 41 is connected to the second oil inlet passage 31. It should be noted that the outlet of the second oil inlet passage 31 is the end of the second oil inlet passage 31 closest to the control valve 4, and the inlet of the third oil inlet passage 41 is the end of the third oil inlet passage 41 closest to the armature seat 3.

[0045] In some embodiments, the third oil inlet passage is arranged parallel to the axis of the injector body 1, and the second oil return passage is arranged obliquely relative to the axis of the injector body 1, so as to facilitate the arrangement of the third oil inlet passage 41 and the second oil return passage 42.

[0046] The second return oil passage 42 is connected to the first return oil passage 12 via an armature 32. Specifically, the armature 32 can seal and open the outlet of the second return oil passage 42 during its movement. The outlet of the second return oil passage 42 is located at the end closest to the armature seat 3.

[0047] Combination Figure 4 As shown, the armature seat 3 has a third oil return channel 33, the second oil return channel 42 is connected to the third oil return channel 33 through the armature 32, and the third oil return channel 33 is connected to the first oil return channel 12.

[0048] In some optional embodiments, a sealing bead 43 is provided at the outlet of the second return oil passage 42, which can be used to seal the outlet of the second return oil passage 42. Specifically, the sealing bead 43 can abut against the armature 32, and when the armature 32 and the sealing bead 43 are in abutting state, the sealing bead 43 seals the outlet of the second return oil passage 42; as the armature 32 moves away from the sealing bead 43, the sealing bead 43 gradually opens the second return oil passage 42.

[0049] The nozzle assembly 100 has an on / off nozzle outlet 61 on the side away from the control valve 4, and the nozzle assembly 100 has a first oil chamber 01 and a second oil chamber 02.

[0050] The first oil chamber 01 connects the second return oil passage 42 and the third inlet oil passage 41. Optionally, the first oil chamber 01 is located at the end of the nozzle assembly 100 away from the nozzle outlet 61. The shape and size of the first oil chamber 01 are not specifically limited. The inlet of the first oil chamber 01 is opposite to and connected to the outlet of the third inlet oil passage 41, and the outlet of the first oil chamber 01 is opposite to and connected to the inlet of the second return oil passage 42. It should be noted that the outlet of the third inlet oil passage 41 is the end of the third inlet oil passage 41 closest to the nozzle assembly 100, and the inlet of the second return oil passage 42 is the end of the second return oil passage 42 closest to the nozzle assembly 100. Both the outlet and inlet of the first oil chamber 01 are located at the end of the nozzle assembly 100 closest to the control valve 4.

[0051] The first oil chamber 01 is connected to the third oil inlet channel 41, which allows high-pressure oil to enter the first oil chamber 01 through the third oil inlet channel 41 and then fill the second oil return channel 42 through the first oil chamber 01. After the second oil return channel 42 is connected to the first oil return channel 12, the first oil chamber 01 is connected to the oil tank through the second oil return channel 42 and the first oil return channel 12.

[0052] Specifically, a third oil chamber 03 is provided at the end of the nozzle assembly 100 away from the nozzle outlet 61. The third oil chamber 03 is connected to the first oil chamber 01, and the first oil chamber 01 is connected to the second return oil passage 42. Since the third oil chamber 03 is connected to the second return oil passage 42, when the second return oil passage 42 is connected to the oil tank, the pressure drop in the third oil chamber 03 is greater, which can increase the pressure difference between the third oil chamber 03 and the second oil chamber 02, making it easier to adjust the opening of the nozzle outlet 61.

[0053] The second oil chamber 02 connects the first oil chamber 01 and the nozzle outlet 61. One end of the second oil chamber 02 along the axial direction of the nozzle assembly 100 is connected to the first oil chamber 01, and the other end along the axial direction is connected to the nozzle outlet 61. Since the second oil chamber 02 is connected to the first oil chamber 01, high-pressure oil will accumulate in the second oil chamber 02.

[0054] When the second return oil passage 42 is connected to the first return oil passage 12, the third oil chamber 03 is in a low-pressure state and the second oil chamber 02 is in a high-pressure state because the first return oil passage 12 is connected to the oil tank. Under the action of pressure difference, the nozzle outlet 61 is opened.

[0055] Based on the above structure and connection relationships, the working process of the fuel injector disclosed in the embodiments of this application will be described as follows:

[0056] The high-pressure fuel from the high-pressure fuel pump enters the injector through the first inlet fuel passage 11, then through the second inlet fuel passage 31, into the third inlet fuel passage 41, and then into the first fuel chamber 01. After being collected in the first fuel chamber 01, part of it flows into the second fuel chamber 02, and the other part flows into the second return fuel passage 42. If the armature 32 is in the initial state (the electromagnetic component does not attract the armature 32), the second return fuel passage 42 is blocked by the sealing bead 43. The pressure in the first fuel chamber 01 and the second fuel chamber 02 is equal, that is, the pressure in the third fuel chamber 03 is the same as that in the second fuel chamber 02. The nozzle outlet 61 is closed and no fuel is injected.

[0057] When the electromagnetic component is energized, the armature 32 is attracted and moved away from the control valve 4, causing the armature 32 to separate from the sealing bead 43. Under the pressure of the second return oil passage 42, the sealing bead 43 separates from the second return oil passage 42, and the second return oil passage 42 connects with the first return oil passage 12, allowing the high-pressure oil in the second return oil passage 42 to flow back to the oil tank, releasing the pressure in the first oil chamber 01, specifically releasing the pressure in the third oil chamber 03, causing the pressure in the third oil chamber 03 to decrease. A pressure difference is generated between the third oil chamber 03 and the second oil chamber 02. Under the action of the pressure difference, the nozzle outlet 61 is opened, and oil injection begins.

[0058] The fuel injector disclosed in this application utilizes an electromagnetic component to adjust the position of the armature 32, thereby changing the opening of the second return oil passage 42, and subsequently adjusting the pressure of the third oil chamber 03. This creates a pressure difference between the third oil chamber 03 and the second oil chamber 02, thus adjusting the opening of the nozzle outlet 61. In other words, by changing the pressure of the first oil chamber 01 and the third oil chamber 03 through communication with the fuel tank, the fuel injector's fuel injection is controlled. The aforementioned fuel injector has a simple structure and is easy to manufacture.

[0059] The following combination Figure 1 and Figure 3 The structure of the electromagnetic component disclosed in the embodiments of this application will be described. The electromagnetic component includes: valve stem 2, electromagnetic coil, fixed magnet and return spring 21.

[0060] The valve stem 2 is located within the accommodating space of the injector body 1 and can move along the axial direction of the injector body 1. The valve stem 2 is equipped with an electromagnetic coil and a fixed magnet. When the electromagnetic coil is energized, the fixed magnet generates a magnetic attraction force to attract the armature 32, so that the armature 32 can move along the axial direction of the injector body 1.

[0061] The return spring 21 is built into the valve stem 2. The return spring 21 is arranged along the axial direction of the injector body 1, with one end abutting against the valve stem 2 and the other end abutting against the armature 32.

[0062] Combination Figure 4As shown, there is a moving gap 322 between the armature 32 and the valve stem 2 along the axial direction. This moving gap 322 is the space for the armature 32 to move in the axial direction. The size of the moving gap 322 is not specifically limited here and can be set according to the opening of the second return oil passage 42.

[0063] In some embodiments, the armature 32 has a T-shaped structure, including a first segment and a second segment. The first segment is located in the accommodating space of the injector body 1 and is opposite to the valve stem 2. The radial dimension of the first segment is larger than the radial dimension of the armature channel, so that the first segment can fit and limit the armature seat 3 along the axial direction. The second segment of the armature 32 is located in the armature channel extending along the axial direction of the injector body 1.

[0064] A support ring 321 is provided between the armature seat 3 and the valve stem 2. The support ring 321 is sleeved on the outside of the first section of the armature 32. The support ring 321 supports the valve stem 2, and the dimension of the support ring 321 along the axial direction is larger than the dimension of the first section of the armature 32 along the axial direction. The difference between the two dimensions is the moving gap 322.

[0065] It should be noted that: the embodiment of this application uses the support ring 321 to support the control component, and uses the height difference between the support ring 321 and the first segment of the armature 32 to form the moving distance of the armature 32. The structure is simple and easy to process.

[0066] The following combination Figure 1 and Figure 2 The specific structure of the nozzle assembly 100 disclosed in this application will be described.

[0067] The nozzle assembly 100 disclosed in this application includes a needle valve body 6, a needle valve core 7, and a guide sleeve 8.

[0068] The needle valve body 6 is connected to the side of the control valve 4 away from the armature seat 3, and a nozzle outlet 61 is provided on the side of the needle valve body 6 away from the control valve 4. The needle valve body 6 and the clamping sleeve 5 are axially limited and connected to the injector body 1.

[0069] The needle valve core 7 is disposed inside the needle valve body 6, and the needle valve core 7 can move along the axial direction within the needle valve body 6. There is a gap between the needle valve body 6 and the needle valve core 7, which forms a second oil chamber 02. When the needle valve core 7 is in the initial position, it blocks the nozzle outlet 61. As the needle valve core 7 moves away from the nozzle outlet 61, it can release the nozzle outlet 61, allowing the nozzle outlet 61 to communicate with the second oil chamber 02.

[0070] The dimension of the needle valve core 7 along the axial direction is smaller than the dimension of the needle valve body 6 along the axial direction, so as to realize the movement of the needle valve core 7 in the axial direction. Optionally, the inner wall of the needle valve body 6 near the control valve 4 is an inclined surface, and the inclined surface is inclined in the direction from the nozzle assembly 100 towards the control valve 4, gradually inclined towards the outer wall of the needle valve body 6. It can be understood that the inner wall of the needle valve body 6 has a gradually expanding structure towards the control valve 4 at the end near the control valve 4.

[0071] The guide sleeve 8 is fitted onto the outer side of the needle valve core 7 at the end furthest from the nozzle outlet 61, and the guide sleeve 8 and the end of the needle valve core 7 near the control valve 4 form the aforementioned third oil chamber 03. Specifically, there is a gap between the gradually expanding structure of the needle valve body 6 and the outer wall of the guide sleeve 8, which forms the first oil chamber 01. The side wall of the guide sleeve 8 has a radially penetrating channel, through which the first oil chamber 01 and the third oil chamber 03 are connected.

[0072] In this embodiment, the gap between the gradually expanding structure of the needle valve body 6 and the outer wall of the guide sleeve 8 is opposite to and communicates with the third oil inlet passage 41. The gap between the guide sleeve 8 and the outer wall of the needle valve core 7 is opposite to and communicates with the second oil return passage 42.

[0073] In some embodiments, a spring is provided on the needle valve core 7 and the guide sleeve 8 along the axial direction. The spring is sleeved on the needle valve core 7, and one end of the spring is connected to the needle valve core 7, while the other end of the spring is connected to the guide sleeve 8.

[0074] As the needle valve core 7 moves away from the nozzle outlet 61 under the pressure difference between the first oil chamber 01 and the second oil chamber 02, the spring is gradually compressed. After the armature 32 is in the initial state, the outlet of the second return oil passage 42 is sealed by the sealing bead 43, the pressure in the first oil chamber 01 increases, and the needle valve core 7 moves towards the nozzle outlet 61 under the action of the spring.

[0075] It should be noted that the nozzle assembly 100 in this embodiment uses a needle valve, which has a simple structure. The method by which the nozzle outlet 61 is switched on and off in this application is that the needle valve core 7 moves under the action of a pressure difference. This method has a simple structure and good stability.

[0076] Based on the above technical solution, the injector in this application embodiment also includes an adjusting shim 9.

[0077] The adjusting shim 9 is located at the end of the needle valve core 7 near the control valve 4, and the third oil chamber 03 is located between the adjusting shim 9 and the needle valve core 7. The first oil chamber 01, the second return oil passage 42, and the second oil chamber 02 are all connected to the third oil chamber 03. Optionally, the adjusting shim 9 has a shim channel 91, which connects the third oil chamber 03 and the second return oil passage 42.

[0078] Optionally, the gap between the gradually expanding structure of the guide sleeve 8 and the outer wall of the needle valve core 7 (i.e., the first oil chamber 01) is connected to the third oil inlet passage 41. The first oil chamber 01 is connected to the channel on the side wall of the guide sleeve 8. The third oil chamber 03 is located on the inner wall of the guide sleeve 8 and is connected to the first oil chamber 01 through the channel.

[0079] The gasket channel 91 is arranged along the axis of the adjusting gasket 9, with one end opposite and connected to the second return oil channel 42, and the other end opposite and connected to the third oil chamber 03.

[0080] It should be noted that the moving distance of the needle valve core 7 can be changed by setting an adjusting shim 9 at one end of the needle valve core 7 near the control valve 4. Specifically, during the movement of the needle valve core 7 under the pressure difference between the first oil chamber 01 and the second oil chamber 02, when it moves to abut against the adjusting shim 9, the needle valve core 7 has moved to its maximum distance, thus achieving the purpose of precisely controlling the amount of fuel injected.

[0081] In some embodiments, the lift of the needle valve core 7 can be adjusted by changing the dimension of the adjusting shim 9 along the axial direction of the needle valve core 7. Optionally, the dimension of the adjusting shim 9 along the axial direction of the needle valve core 7 can be achieved by changing the thickness of the adjusting shim 9; alternatively, the adjusting shim 9 can be configured to extend and retract along the axial direction of the needle valve core 7. The extension and retraction of the adjusting shim 9 can be achieved by arranging an electromagnetic control structure within the nozzle assembly 100. The electromagnetic control structure includes an electromagnet that attracts the extension and retraction of the adjusting shim 9. It should be noted that the arrangement and specific structure of the electromagnetic control structure are not specifically limited here, as long as the above-mentioned purpose can be achieved.

[0082] like Figure 2 As shown, the inner wall of the guide sleeve 8 disclosed in this application embodiment has a stepped structure, and the adjusting shim 9 is limited to the stepped structure and the control valve 4 along the axial direction of the guide sleeve 8.

[0083] The step position of the inner wall of the guide sleeve 8 is adapted to the thickness of the adjusting shim 9 so that the adjusting shim 9 fits against the control valve 4 to ensure sealing.

[0084] It should be noted that: in this paper, the injector body 1, armature seat 3, and control valve 4 are sequentially fitted together along the axial direction to ensure the sealing of the connection between adjacent components. The control valve 4 is sealed together with the needle valve body 6 to ensure the sealing of the connection. That is, the injector in this embodiment adopts a planar seal, which can reduce the number of parts.

[0085] Furthermore, this application also discloses an internal combustion engine fuel system, which includes a fuel injector. The fuel injector is the same as the one disclosed in the above embodiments. Therefore, the internal combustion engine fuel system with this fuel injector also has all the above-mentioned technical effects, which will not be elaborated here.

[0086] In addition, this application also discloses a vehicle including an internal combustion engine fuel system as disclosed in the above embodiments. Therefore, a vehicle having the internal combustion engine fuel system also has the above-mentioned technical effects.

[0087] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuel injector, characterized in that, include: The injector body (1) has one end connected to a high-pressure fuel pump along the axial direction, and the injector body (1) has a first inlet oil passage (11) and a first return oil passage (12). An armature seat (3) is connected to the other end of the injector body (1) along the axial direction, and the armature seat (3) has a second oil inlet passage (31) and an armature channel, the second oil inlet passage (31) being connected to the first oil inlet passage (11); the armature channel is provided with an armature (32) that can move along the axial direction of the injector body (1); An electromagnetic component is disposed within the injector body (1) and is used to attract the armature (32) to move, and the attraction force of the electromagnetic component on the armature (32) is adjustable; A control valve (4) is connected to the armature seat (3) on the side away from the injector body (1). The control valve (4) has a third oil inlet passage (41) and a second oil return passage (42). The third oil inlet passage (41) is connected to the second oil inlet passage (31). The second oil return passage (42) is connected to the first oil return passage (12) through the armature (32). A nozzle assembly (100) is disposed on the side of the control valve (4) away from the armature seat (3). The nozzle assembly (100) on the side away from the control valve (4) has a switchable nozzle outlet (61). The nozzle assembly (100) has a first oil chamber (01) and a second oil chamber (02). The first oil chamber (01) is connected to the second return oil passage (42) and the third inlet oil passage (41). The second oil chamber (02) is connected to the first oil chamber (01) and the nozzle outlet (61). When the pressure of the first oil chamber (01) is less than the pressure of the second oil chamber (02), the nozzle outlet (61) is open.

2. The injector according to claim 1, characterized in that, The nozzle assembly (100) includes: The needle valve body (6) is connected to the side of the control valve (4) away from the armature seat (3), and the nozzle outlet (61) is provided on the side of the needle valve body (6) away from the control valve (4). The needle valve core (7) is disposed inside the needle valve body (6) and is movable along the axial direction of the needle valve body (6), and is capable of blocking the nozzle outlet (61); the needle valve core (7) and the needle valve body (6) have a second oil chamber (02); A guide sleeve (8) is sleeved on the outer side of the end of the needle valve core (7) away from the nozzle outlet (61), and the guide sleeve (8) and the needle valve core (7) have the first oil cavity (01).

3. The injector according to claim 2, characterized in that, It also includes an adjusting shim (9), which is located at one end of the needle valve core (7) near the control valve (4). There is a third oil chamber (03) between the adjusting shim (9) and the needle valve core (7). The first oil chamber (01), the second return oil passage (42) and the second oil chamber (02) are all connected to the third oil chamber (03).

4. The injector according to claim 3, characterized in that, The adjusting shim (9) has a shim channel (91) that connects the second return oil passage (42) and the third oil chamber (03).

5. The injector according to claim 3, characterized in that, The inner wall of the guide sleeve (8) has a stepped structure, and the adjusting shim (9) is positioned between the stepped structure and the control valve (4) along the axial direction of the guide sleeve (8).

6. The injector according to claim 3, characterized in that, The size of the adjusting shim (9) is adjustable along the axial direction of the needle valve core (7).

7. The injector according to any one of claims 1 to 6, characterized in that, The armature (32) separates the second return oil passage (42) from the first return oil passage (12) by a sealing bead (43).

8. The injector according to any one of claims 1 to 6, characterized in that, The electromagnetic assembly includes a valve stem (2), an electromagnetic coil, a fixed magnet, and a return spring; The valve stem (2) is provided with the electromagnetic coil and the fixed magnet. When the electromagnetic coil is energized, the fixed magnet can attract the armature (32) and move the armature (32) away from the control valve (4). One end of the return spring (21) abuts against the valve stem (2) and the other end abuts against the armature (32).

9. An internal combustion engine fuel system, characterized in that, Including the injector as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, Including the internal combustion engine fuel system as described in claim 9.

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