Gas injector, power system and vehicle

Abstract

The present invention belongs to the technical field of vehicle power system, and discloses a gas injector, a power system and a vehicle. The gas injector includes an injector housing, an electromagnet, a stopper and a sealing assembly. An elastic reset member is arranged in the first guide hole of the electromagnet; the sealing assembly includes a connected first valve body and a guide column, an armature is movably arranged in the second guide hole of the stopper, and is connected with an elastic buffer member, the guide column is movably arranged in the third guide hole of the stopper, and extends into the first guide hole to be connected with the elastic reset member, the first valve body is arranged on the side of the stopper facing away from the electromagnet, and can abut against the stopper; when the electromagnet is energized, the armature drives the sealing assembly to move so that the first valve body moves to the ventilation position; when the electromagnet is de-energized, the sealing assembly drives the armature to move under the elastic force of the elastic reset member until the first valve body moves to the air-blocking position. The stopper has both guiding and limiting functions, which can simplify the structure and avoid motion jamming.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power systems, and in particular to a gas injector, a power system and a vehicle. Background Art

[0002] The use of combustible gas to replace diesel and gasoline as automobile fuel can effectively reduce automobile exhaust pollution. Whether it is a natural gas engine, a hydrogen engine or a hydrogen fuel cell, the gas used needs to be controlled and accurately supplied to meet the fuel demand of the automobile power system in real time. Similar to the common diesel supply system and gasoline supply system, the above-mentioned power system using gas fuel also uses an electronically controlled injector to realize fuel control and supply. The electronically controlled gas injector is responsible for providing fuel to the automobile power system in a timely and quantitative manner, and is the core functional component of the automobile power system. The gas injector usually includes a solenoid valve, a sealing valve, a jet nozzle and other components, which are connected to the electronic control unit through an electrical connection harness and are driven and controlled by the electronic control unit. The drive signal of the electronic control unit is input into the solenoid valve through the connection harness and the connection plug. The solenoid valve generates electromagnetic force and then controls the injector to supply gas fuel to the automobile power system.

[0003] The solenoid valve in the gas injector controls the movement of the armature assembly to achieve air intake and air blocking. When the armature assembly moves, the guide structure is required to guide and the limit structure is required to limit, so as to ensure the movement accuracy of the armature assembly and limit the movement stroke of the armature assembly. In the prior art, the guide structure and the limit structure are split structures, resulting in a complex internal structure of the injector and a large space occupation; moreover, the armature assembly will produce an impact after it moves into place. Since the gas injector is not lubricated by fuel like the fuel injector, the impact surface has no oil film protection, which is easy to wear and deform, and then the movement is stuck; in addition, in the prior art, the movement stroke of the armature assembly and the residual air gap of the solenoid valve cannot be accurately adjusted, so that the gas injector cannot be optimized. Summary of the invention

[0004] The object of the present invention is to provide a gas injector, a power system and a vehicle, which can simplify the internal structure of the gas injector and can buffer the impact when the armature assembly moves into place.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a gas injector is provided, comprising:

[0007] An injector housing, wherein an air inlet and an air jet are provided on the injector housing;

[0008] An electromagnet is disposed in the injector housing, the electromagnet is provided with a first guide hole, and an elastic reset member is disposed in the first guide hole;

[0009] a stopper, arranged in the injector housing, the stopper being provided with a second guide hole and a third guide hole coaxial with and connected to the first guide hole, the second guide hole having a larger diameter than the third guide hole, and the second guide hole being located between the first guide hole and the third guide hole;

[0010] an armature, the armature being movably disposed in the second guide hole;

[0011] A sealing assembly, the sealing assembly comprising a first valve body and a guide column connected to each other, the armature sleeve being connected to the guide column, and an elastic buffering member being arranged on the side of the armature facing away from the first guide hole; the guide column being movably arranged through the third guide hole, the second guide hole and the first guide hole, and being connected to the elastic reset member, the first valve body being arranged on the side of the limiter facing away from the electromagnet, and being capable of abutting against the limiter;

[0012] When the electromagnet is energized, the armature drives the sealing assembly to move, so that the first valve body moves to a ventilation position capable of conducting the air inlet and the air jet;

[0013] When the electromagnet is powered off, the sealing assembly drives the armature to move under the elastic force of the elastic reset member until the first valve body moves to a closed air position capable of blocking the air inlet and the air jet.

[0014] As a preferred solution of the gas injector provided by the present invention, the second guide hole is a stepped hole, the armature is movably arranged in the large diameter hole section of the stepped hole, and the elastic buffer is sleeved on the guide column and telescopically arranged in the small diameter hole section of the stepped hole.

[0015] As a preferred solution of the gas injector provided by the present invention, the inner wall of the injector housing is circumferentially provided with a first boss, the limit member includes a first limit surface for abutting against the first valve body, and a stroke adjustment ring is sandwiched between the first boss and the first limit surface.

[0016] As a preferred solution of the gas injector provided by the present invention, the first valve body includes a second limiting surface for abutting against the limiting member, and an elastic cushion layer is provided on the first limiting surface and / or the second limiting surface.

[0017] As a preferred solution of the gas injector provided by the present invention, one end of the guide column extending into the first guide hole is sleeved with a first stop ring, a residual air gap adjustment ring is sandwiched between the armature and the first stop ring, and the residual air gap adjustment ring is sleeved on the guide column.

[0018] As a preferred solution of the gas injector provided by the present invention, an annular groove is provided at one end of the guide column extending into the first guide hole, and the first stop ring is clamped in the annular groove.

[0019] As a preferred embodiment of the gas injector provided by the present invention, it also includes a second valve body, which is arranged in the injector housing and located between the first valve body and the injection port. The second valve body is provided with an air outlet channel, which is connected to the injection port. The first valve body can detachably cover the opening of the air outlet channel to open or block the air inlet and the air outlet channel.

[0020] As a preferred embodiment of the gas injector provided by the present invention, at least one of the air inlets is respectively arranged on two opposite sides of the injector shell, an air inlet cavity is formed between the first valve body and the injector shell, at least two air outlet channels are arranged on the second valve body, the axis of the air outlet channel is perpendicular to the axis of the air inlet, ventilation grooves are arranged between the plurality of air outlet channels on the second valve body, the first valve body can detachably cover the notch of the ventilation groove, the first valve body is provided with a first air inlet channel and a second air inlet channel which are vertically connected, each of the air inlets is connected to the first air inlet channel through the air inlet cavity, and the second air inlet channel is connected to the middle part of the first air inlet channel and is connected to the ventilation groove.

[0021] As a preferred solution of the gas injector provided by the present invention, the first valve body is an annular step structure, the small diameter section of the annular step structure is used to abut against the limiter, and the large diameter section of the annular step structure can detachably cover the gas outlet channel.

[0022] As a preferred solution of the gas injector provided by the present invention, a clamping column is convexly provided on the end surface of the guide column, a second stop ring is sleeved on the clamping column, and the elastic reset member is arranged between the bottom wall of the first guide hole and the second stop ring.

[0023] As a preferred solution of the gas injector provided by the present invention, the cross-sectional size of the gas injection port remains unchanged or gradually decreases or gradually increases along the gas outlet direction.

[0024] As a preferred embodiment of the gas injector provided by the present invention, it also includes a locking screw sleeve, which is threaded into the injector housing, and the outer wall ring of the electromagnet is provided with a second boss, the electromagnet is inserted into the locking screw sleeve and abuts against the end of the locking screw sleeve through the second boss, and the locking screw sleeve is screwed to make the electromagnet abut against the limit member.

[0025] In a second aspect, a power system is provided, comprising the gas injector as described above.

[0026] In a third aspect, a vehicle is provided, comprising the power system as described above.

[0027] Beneficial effects of the present invention:

[0028] The present invention provides a gas injector, a power system and a vehicle, wherein the first valve body has a ventilation position and a closed position. When the first valve body is in the ventilation position, the combustible gas enters through the air inlet and is ejected through the air jet. When the first valve body is in the closed position, the combustible gas cannot be ejected through the air jet. Specifically, when the electromagnet is energized, the first valve body is magnetically attracted to the armature, so that the armature drives the first valve body to move through the guide column until the first valve body abuts against the side of the limiter away from the electromagnet. During this process, the first valve body moves from the closed position to the ventilation position to conduct the air inlet and the air jet, and the guide column compresses the elastic reset component. When the electromagnet is de-energized, the magnetic attraction between the first valve body and the armature disappears, the guide column moves in the opposite direction under the elastic force of the elastic reset component, the armature and the first valve body move synchronously under the drive of the guide column, and the first valve body returns from the ventilation position to the closed position again to block the conduction between the air inlet and the air jet. During the return process of the first valve body, the armature compresses the elastic buffer component to buffer the impact force when the first valve body is in place. Furthermore, when the guide column moves, it cooperates with the third guide hole provided on the limiter to ensure the movement accuracy, and the side of the limiter facing the first valve body is used to stop the first valve body, thereby limiting the movement stroke of the first valve body. The limiter has both guiding and limiting functions, and there is no need to separately set a guiding structure and a limiting structure for the armature and the sealing assembly, which can simplify the internal structure of the gas injector. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a first cross-sectional view of a gas injector provided by a specific embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A partial view of

[0031] Figure 3 yes Figure 1 A partial enlarged view of the middle A;

[0032] Figure 4 4 is a second cross-sectional view of a gas injector provided in accordance with a specific embodiment of the present invention.

[0033] In the figure:

[0034] 1. Injector housing; 2. Electromagnet; 3. Limiting member; 4. Armature; 5. Sealing assembly; 7. Stroke adjustment ring; 8. Residual air gap adjustment ring; 9. Second valve body; 10. Locking screw sleeve;

[0035] 11. air inlet; 12. jet outlet; 13. first boss; 14. air inlet cavity;

[0036] 21. first guide hole; 22. second boss;

[0037] 31. second guide hole; 32. third guide hole; 33. first limiting surface;

[0038] 51. first valve body; 52. guide column;

[0039] 511, second limiting surface; 512, first air inlet; 513, second air inlet;

[0040] 521, first stop ring; 522, annular groove; 523, clamping column; 524, second stop ring;

[0041] 61. elastic reset member; 62. elastic buffer member;

[0042] 91. Air outlet channel; 92. Ventilation groove. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] like Figure 1 As shown, this embodiment provides a gas injector for providing gas fuel to a vehicle power system in a timely and quantitative manner. The gas injector comprises an injector housing 1, an electromagnet 2, a stopper 3, an armature 4 and a sealing assembly 5.

[0048] See also Figure 1 The injector housing 1 is provided with an air inlet 11 and an air jet 12, which can be connected or blocked by the sealing assembly 5. When the air inlet 11 and the air jet 12 are connected, the combustible gas entering the inner cavity of the injector housing 1 through the air inlet 11 can be ejected through the air jet 12.

[0049] See also Figure 1 The electromagnet 2 is fixedly arranged in the injector housing 1, and a first guide hole 21 is arranged on the electromagnet 2. An elastic reset member 61 is arranged in the first guide hole 21. The elastic reset member 61 can move telescopically in the first guide hole 21. The extension direction of the first guide hole 21 is consistent with the extension direction of the inner cavity of the injector housing 1. Figure 1 Middle up and down direction.

[0050] See also Figure 1 The stopper 3 is arranged in the injector housing 1, and the stopper 3 is provided with a second guide hole 31 and a third guide hole 32 which are coaxial with and connected to the first guide hole 21. The diameter of the second guide hole 31 is larger than that of the third guide hole 32, and the second guide hole 31 is located between the first guide hole 21 and the third guide hole 32. The armature 4 is movably arranged in the second guide hole 31, and can move toward the direction close to the electromagnet 2 under the magnetic attraction of the electromagnet 2, and when the electromagnet 2 is powered off, the armature 4 can move back to its original position in the reverse direction.

[0051] Continue reading Figure 1The sealing assembly 5 includes a first valve body 51 and a guide column 52 connected to each other. The armature 4 is sleeved and connected to the guide column 52 so that the armature 4 can move synchronously with the guide column 52. An elastic buffer 62 is provided on the side of the armature 4 facing away from the first guide hole 21. The elastic buffer 62 is sandwiched between the armature 4 and the bottom wall of the second guide hole 31, and can play a buffering role when the armature 4 moves downward. The guide column 52 is movably inserted into the third guide hole 32, the second guide hole 31 and the first guide hole 21, and is connected to the elastic reset member 61. When the electromagnet 2 is powered off, the elastic reset member 61 can push the guide column 52 to move downward. The first valve body 51 is provided on the side of the limiter 3 facing away from the electromagnet 2, and can abut against the limiter 3. When the first valve body 51 abuts against the limiter 3, the armature 4 and the guide column 52 no longer move upward. That is, the cross-sectional dimension of the guide column 52 is smaller than the cross-sectional dimension of the first valve body 51 , so that a step structure is formed between the outer surface of the guide column 52 and the first valve body 51 , and the step structure can be engaged with the limit member 3 .

[0052] The first valve body 51 has a ventilation position and a closed position. When it is in the ventilation position, the combustible gas enters through the air inlet 11 and is ejected through the air outlet 12. When it is in the closed position, the combustible gas cannot be ejected through the air outlet 12. Specifically, when the electromagnet 2 is energized, it magnetically attracts the armature 4, so that the armature 4 drives the first valve body 51 to move through the guide column 52 until the first valve body 51 abuts against the side of the limiter 3 away from the electromagnet 2. In this process, the first valve body 51 moves from the closed position to the ventilation position to connect the air inlet 11 and the air outlet 12, and the guide column 52 compresses the elastic reset member 61. When the electromagnet 2 is powered off, the magnetic attraction between it and the armature 4 disappears, the guide column 52 moves in the opposite direction under the elastic force of the elastic reset member 61, the armature 4 and the first valve body 51 move synchronously driven by the guide column 52, and the first valve body 51 returns from the venting position to the air-closing position again to block the conduction between the air inlet 11 and the jet port 12. During the return process of the first valve body 51, the armature 4 compresses the elastic buffer member 62 to buffer the impact force when the first valve body 51 is in place. Further, when the guide column 52 moves, it cooperates with the third guide hole 32 provided on the limit member 3 to ensure the movement accuracy, and the side of the limit member 3 facing the first valve body 51 is used to stop the first valve body 51, which plays a role in limiting the movement stroke of the first valve body 51. The limit member 3 has both guiding and limiting functions, and there is no need to set a guiding structure and a limiting structure separately for the armature 4 and the sealing assembly 5, which can simplify the internal structure of the gas injector.

[0053] Optionally, the guide column 52 is matched with the inner wall clearance of the third guide hole 32. Further, in order to reduce the friction resistance of the guide column 52 when moving in the third guide hole 32 and reduce wear, a bearing can be embedded in the third guide hole 32, and the guide column 52 can be movably inserted into the bearing; or the processing accuracy of the third guide hole 32 is improved to make its hole wall smoother and reduce roughness; the limit part 3 can also be processed by plastic material, and the guide column 52 can be coated with a non-metallic coating.

[0054] like Figure 1 As shown, in this embodiment, the second guide hole 31 is a stepped hole, the armature 4 is movably disposed in the large diameter hole section of the stepped hole, and the elastic buffer 62 is sleeved on the guide column 52 and is telescopically disposed in the small diameter hole section of the stepped hole. The cross-sectional dimension of the armature 4 is larger than the cross-sectional dimension of the elastic buffer 62, so the second guide hole 31 is adaptively set as a stepped hole to guide the armature 4 and the elastic buffer 62. Since the cross-sectional dimension of the armature 4 is large, during its movement, the elastic buffer 62 can always abut against the bottom surface of the armature 4, so that the elastic buffer 62 can stably telescope.

[0055] In this embodiment, the elastic reset member 61 and the elastic buffer member 62 are preferably springs.

[0056] See also Figure 1 and Figure 2 Inside the injector housing 1, a second valve body 9 is arranged on the side of the first valve body 51 facing away from the limiter 3. The second valve body 9 is located between the first valve body 51 and the air jet 12. The first valve body 51 is in sealing contact or separation with the second valve body 9 to achieve ventilation and air blocking. Specifically, the air inlet 11 is arranged on the side wall of the injector housing 1, and the axis of the air inlet 11 is perpendicular to the axis of the guide column 52. The air jet 12 is arranged on the bottom wall of the injector housing 1, and the axis of the air jet 12 is perpendicular to the axis of the air inlet 11. The second valve body 9 is provided with an air outlet channel 91, which is arranged in the up-down direction and communicated with the air jet 12. The first valve body 51 can detachably cover the upper end opening of the air outlet channel 91 to conduct or block the air inlet 11 and the air outlet channel 91, thereby achieving ventilation and air blocking.

[0057] When the first valve body 51 moves to abut against the limit member 3, the first valve body 51 is separated from the second valve body 9. At this time, the upper end of the gas outlet channel 91 is exposed, and the combustible gas flows through the gas inlet 11 and the gas outlet channel 91 in turn to the injection port 12 for injection.

[0058] See also Figure 1 and Figure 2The inner wall of the injector housing 1 is provided with a first boss 13 along the circumferential direction, and the first boss 13 is located on the side of the stopper 3 facing away from the electromagnet 2. The stopper 3 includes a first stopper surface 33 for abutting against the first valve body 51, and the side of the stopper 3 facing away from the electromagnet 2 is the first stopper surface 33. Correspondingly, the first valve body 51 includes a second stopper surface 511 for abutting against the stopper 3, and the side of the first valve body 51 facing the stopper 3 is the second stopper surface 511, and the first stopper surface 33 can abut against the second stopper surface 511.

[0059] The distance between the first limit surface 33 and the second limit surface 511 is the stroke of the first valve body 51. When the stroke of the first valve body 51 increases, the distance between the first valve body 51 and the second valve body 9 in the ventilation position increases. At this time, a larger channel is formed between the first valve body 51 and the second valve body 9 to allow the gas to enter the outlet channel 91 from the air inlet 11, which can increase the air intake per unit time. That is, by increasing the distance between the first limit surface 33 and the second limit surface 511, the single air intake volume of the gas injector can be increased, which is conducive to the design and development of a large-flow gas injector. To adjust the distance between the first limit surface 33 and the second limit surface 511, refer to Figure 2 , a stroke adjustment ring 7 is sandwiched between the first boss 13 and the first limit surface 33. By adjusting the thickness of the stroke adjustment ring 7, the first limit surface 33 and the second limit surface 511 can have different spacings, so as to accurately adjust the stroke of the first valve body 51. In the design stage, according to the required air intake volume, a stroke adjustment ring 7 of appropriate thickness can be selected and sandwiched between the first boss 13 and the first limit surface 33, without controlling the machining accuracy of other structures to control the stroke of the first valve body 51. In other words, after the machining of other structures is completed, even if there is a slight error, it is only necessary to machine the stroke adjustment ring 7 to a corresponding thickness to ensure that the spacing between the first limit surface 33 and the second limit surface 511 is consistent with the designed stroke of the first valve body 51.

[0060] Furthermore, an elastic cushion layer is provided on the first limiting surface 33 and / or the second limiting surface 511 to reduce the wear and noise caused when the first valve body 51 hits the limiting member 3. The elastic cushion layer can be a rubber shock-absorbing layer, which is partially provided on the first limiting surface 33 and / or the second limiting surface 511 or covers the entire surface.

[0061] Similarly, in order to cushion the impact force between the first valve body 51 and the second valve body 9 when it returns and reduce wear, a rubber shock-absorbing layer can be set on the side of the first valve body 51 facing the second valve body 9 and / or on the side of the second valve body 9 facing the first valve body 51, which can ensure that the first valve body 51 in the air-tight state can firmly cover the second valve body 9.

[0062] See also Figure 1 and Figure 3When the first valve body 51 moves to the air-closing position (contacting the stopper 3), the distance between the upper surface of the armature 4 and the electromagnet 2 is the residual air gap. The existence of the residual air gap can prevent the electromagnet 2 from directly colliding with the armature 4, which may cause the armature 4 to wear and deform. If the residual air gap is too large, the magnetic attraction of the electromagnet 2 to the armature 4 is not large enough, and the first valve body 51 is easily affected by air flow fluctuations during air intake and cannot be stably maintained in the ventilation position; if the residual air gap is too small, on the one hand, the stroke of the armature 4 will be increased, resulting in a slower response speed of the first valve body 51, and on the other hand, the compression of the elastic reset member 61 will also increase. When the first valve body 51 is reset, its impact force on the second valve body 9 will be stronger, which is not conducive to reducing friction and noise.

[0063] In order to enable the residual air gap to be accurately adjusted to a suitable value, in this embodiment, see Figure 1 and Figure 3 , a first stop ring 521 is sleeved on one end of the guide column 52 extending into the first guide hole 21, a residual air gap adjustment ring 8 is sandwiched between the armature 4 and the first stop ring 521, and the residual air gap adjustment ring 8 is sleeved on the guide column 52. Usually, the residual air gap value can be adjusted by adjusting the thickness of the residual air gap adjustment ring 8, similar to the stroke adjustment ring 7. In the design stage, the residual air gap adjustment ring 8 of appropriate thickness can be selected according to factors such as the response speed requirements of the first valve body 51, and it is sandwiched between the first stop ring 521 and the upper surface of the armature 4, without the need to control the residual air gap by controlling the processing accuracy of other structures.

[0064] The arrangement of the stroke adjustment ring 7 and the residual air gap adjustment ring 8 enables the stroke and the residual air gap value of the first valve body 51 to be accurately adjusted during the final assembly stage of the gas injector, thereby obtaining an optimized gas injector.

[0065] Further, see Figure 3 , an annular groove 522 is provided at one end of the guide column 52 extending into the first guide hole 21, and the first stop ring 521 is clamped in the annular groove 522. When the armature 4 is magnetically attracted and moved by the electromagnet 2, the armature 4 pushes the first stop ring 521 through the residual air gap adjustment ring 8, and the first stop ring 521 drives the guide column 52 to move synchronously by pushing the groove wall of the annular groove 522 until the first valve body 51 moves to the ventilation position. When the electromagnet 2 is powered off, the elastic reset member 61 releases elastic potential energy to push the guide column 52 to move in the opposite direction, and the guide column 52 pushes the first stop ring 521, the residual air gap adjustment ring 8 and the armature 4 to move in the opposite direction synchronously through the engagement of the annular groove 522 and the first stop ring 521, until the first valve body 51 returns to the air-closing position.

[0066] The armature 4 and the guide column 52 are separately arranged, and synchronous movement is achieved between the armature 4 and the guide column 52 through the engagement of the residual air gap adjustment ring 8, the first stop ring 521 and the annular groove 522. When the thickness of the residual air gap adjustment ring 8 is adjusted, the armature 4 moves adaptively relative to the guide column 52.

[0067] Continue reading Figure 3 , a clamping column 523 is convexly provided on the upper end surface of the guide column 52, a second stop ring 524 is sleeved on the clamping column 523, and an elastic reset member 61 is arranged between the bottom wall of the first guide hole 21 and the second stop ring 524. Since the residual air gap adjustment ring 8 and the first stop ring 521 are arranged in the first guide hole 21, the diameter of the first guide hole 21 is larger than the diameter of the guide column 52, and the elastic reset member 61 slides against the hole wall of the first guide hole 21. By sleeved the second stop ring 524 on the clamping column 523, the contact area between the elastic reset member 61 and the guide column 52 can be guaranteed. In addition, the cooperation between the clamping column 523 and the second stop ring 524 can reduce the shaking of the second stop ring 524 relative to the guide column 52.

[0068] See also Figure 2 , an air inlet 11 is respectively provided on at least two opposite sides of the injector housing 1, and an air inlet cavity 14 is formed between the first valve body 51 and the injector housing 1, and the air inlet 11 is connected to the air inlet cavity 14. At least two air outlet channels 91 are provided on the second valve body 9, and the axis of the air outlet channel 91 is perpendicular to the axis of the air inlet 11. A ventilation groove 92 is provided on the second valve body 9 between the multiple air outlet channels 91, that is, the multiple air outlet channels 91 are arranged around the middle ventilation groove 92, the lower end of the ventilation groove 92 is closed, and the upper end is open, and the first valve body 51 can detachably cover the upper end groove of the ventilation groove 92. A first air inlet channel 512 and a second air inlet channel 513 that are vertically connected are provided on the first valve body 51, and the extension direction of the first air inlet channel 512 is perpendicular to the guide column 52, such as Figure 2 As shown, each air inlet 11 is connected to the first air inlet duct 512 through the air inlet cavity 14 , and the second air inlet duct 513 is connected to the middle of the first air inlet duct 512 and is connected to the ventilation groove 92 .

[0069] When the first valve body 51 is in the ventilation position, the gas enters the air intake cavity 14 from the multiple air intake ports 11 at the same time. A part of the gas in the air intake cavity 14 directly enters the jet port 12 through the air outlet channel 91 and is ejected, and the other part flows through the first air intake channel 512 and the second air intake channel 513 on the first valve body 51 in sequence, and then is divided into multiple air outlet channels 91 through the ventilation groove 92, and finally enters the jet port 12 through the air outlet channel 91. The provision of multiple air intake ports 11 and multiple air outlet channels 91, and the opening of the first air intake channel 512 and the second air intake channel 513 on the first valve body 51, expand the gas channel, thereby increasing the injection amount of the gas injector, and finally achieving an increase in the power system power.

[0070] See also Figure 2 In this embodiment, the first valve body 51 is an annular step structure, and the small diameter section of the annular step structure is used to abut against the limiter 3, that is, the upper surface of the small diameter section is the second limiter surface 511; the large diameter section of the annular step structure can detachably cover the air outlet channel 91. The design of the first valve body 51 with an annular step structure is more reasonable. Its large diameter section can reliably cover the large-sized second valve body 9, and the small diameter section allows the space of the air inlet chamber 14 to be expanded, thereby expanding the gas channel. In addition, the large diameter section of the first valve body 51 in the closed position is arranged opposite to the air inlet 11, and the intake pressure acts on the annular surface on the upper side of the large diameter section, so that the first valve body 51 can cover the second valve body 9 more stably to avoid disengagement. When the electromagnet 2 is energized, the armature 4 overcomes the elastic force of the elastic reset member 61 and the intake pressure acting on the first valve body 51 to drive the sealing assembly 5 to move as a whole.

[0071] Optionally, the cross-sectional dimensions of the air jet 12 remain constant along the air outlet direction (eg Figure 1 or gradually decreases along the outlet direction (as shown in Figure 4 or gradually increases along the outlet direction. In actual design, the shape and size of the jet port 12 can be determined according to factors such as the required jet speed and jet volume.

[0072] like Figure 1 and Figure 4 As shown, the injector housing 1 is connected with a locking screw sleeve 10. Specifically, the locking screw sleeve 10 is screwed into the injector housing 1. The outer wall ring of the electromagnet 2 is provided with a second convex shoulder 22 (see Figure 1 ), the electromagnet 2 is inserted into the locking nut 10, and abuts against the end of the locking nut 10 through the second convex shoulder 22, and the locking nut 10 is screwed to make the electromagnet 2 abut against the limiter 3. In the process of assembling the gas injector, after the second valve body 9, the first valve body 51, the limiter 3, etc. are installed in the injector housing 1, the electromagnet 2 is finally installed, and after the electromagnet 2 is plugged and matched with the guide column 52, the locking nut 10 is used to be sleeved on the electromagnet 2 and tightened, and the cooperation between the locking nut 10 and the second convex shoulder 22 can limit the movement of the electromagnet 2.

[0073] This embodiment also provides a power system and a vehicle including the power system, wherein the power system includes the gas injector as described above. The gas injector can provide gas fuel to the power system in a timely and quantitative manner.

[0074] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Gas injector, comprising: An injector housing (1), wherein the injector housing (1) is provided with an air inlet (11) and an air jet outlet (12); An electromagnet (2) is arranged in the injector housing (1), a first guide hole (21) is arranged on the electromagnet (2), and an elastic reset member (61) is arranged in the first guide hole (21); It is characterized by further comprising: a stopper (3) disposed in the injector housing (1), the stopper (3) being provided with a second guide hole (31) and a third guide hole (32) which are coaxial with and connected to the first guide hole (21), the second guide hole (31) having a larger diameter than the third guide hole (32), and the second guide hole (31) being located between the first guide hole (21) and the third guide hole (32); An armature (4), the armature (4) being movably disposed in the second guide hole (31); A sealing assembly (5), the sealing assembly (5) comprising a first valve body (51) and a guide column (52) connected to each other, the armature (4) being sleeved and connected to the guide column (52), and an elastic buffer (62) being arranged on the side of the armature (4) facing away from the first guide hole (21); the guide column (52) being movably arranged through the third guide hole (32), the second guide hole (31) and the first guide hole (21), and being connected to the elastic reset component (61); the first valve body (51) being arranged on the side of the limiter (3) facing away from the electromagnet (2), and being capable of abutting against the limiter (3); When the electromagnet (2) is energized, the armature (4) drives the sealing assembly (5) to move, so that the first valve body (51) moves to a ventilation position capable of conducting the air inlet (11) and the air jet (12); When the electromagnet (2) is powered off, the sealing assembly (5) drives the armature (4) to move under the elastic force of the elastic reset member (61) until the first valve body (51) moves to a closed air position capable of blocking the air inlet (11) and the air jet (12).

2. The gas injector according to claim 1, characterized in that The second guide hole (31) is a stepped hole, the armature (4) is movably arranged in the large-diameter hole section of the stepped hole, and the elastic buffer (62) is sleeved on the guide column (52) and telescopically arranged in the small-diameter hole section of the stepped hole.

3. The gas injector according to claim 1, characterized in that The inner wall of the injector housing (1) is provided with a first boss (13) along the circumferential direction; the limit member (3) comprises a first limit surface (33) for abutting against the first valve body (51); and a stroke adjustment ring (7) is sandwiched between the first boss (13) and the first limit surface (33).

4. The gas injector according to claim 3, characterized in that The first valve body (51) comprises a second limiting surface (511) for abutting against the limiting member (3), and an elastic cushion layer is provided on the first limiting surface (33) and / or the second limiting surface (511).

5. The gas injector according to claim 1, characterized in that: One end of the guide column (52) extending into the first guide hole (21) is sleeved with a first stop ring (521), a residual air gap adjustment ring (8) is sandwiched between the armature (4) and the first stop ring (521), and the residual air gap adjustment ring (8) is sleeved on the guide column (52).

6. The gas injector according to claim 5, characterized in that An annular groove (522) is provided at one end of the guide column (52) extending into the first guide hole (21), and the first stop ring (521) is clamped in the annular groove (522).

7. The gas injector according to claim 1, characterized in that The invention also comprises a second valve body (9), which is arranged in the injector housing (1) and is located between the first valve body (51) and the injection port (12); an air outlet channel (91) is arranged on the second valve body (9), and the air outlet channel (91) is connected to the injection port (12); the first valve body (51) can detachably cover the opening of the air outlet channel (91) to open or block the air inlet (11) and the air outlet channel (91).

8. The gas injector according to claim 7, characterized in that The injector housing (1) is provided with an air inlet (11) on at least two opposite sides, an air inlet cavity (14) is formed between the first valve body (51) and the injector housing (1), at least two air outlet channels (91) are provided on the second valve body (9), the axis of the air outlet channel (91) is perpendicular to the axis of the air inlet (11), a ventilation groove (92) is provided between the plurality of air outlet channels (91) on the second valve body (9), the first valve body (51) can detachably cover the groove of the ventilation groove (92), the first valve body (51) is provided with a first air inlet channel (512) and a second air inlet channel (513) which are vertically connected, each of the air inlets (11) is connected to the first air inlet channel (512) through the air inlet cavity (14), the second air inlet channel (513) is connected to the middle of the first air inlet channel (512) and is connected to the ventilation groove (92).

9. The gas injector according to claim 7, characterized in that The first valve body (51) is an annular step structure, the small diameter section of the annular step structure is used to abut against the limiter (3), and the large diameter section of the annular step structure can detachably cover the air outlet channel (91).

10. The gas injector according to any one of claims 1 to 9, characterized in that: A clamping column (523) is convexly provided on the end surface of the guide column (52), a second stop ring (524) is sleeved on the clamping column (523), and the elastic reset member (61) is arranged between the bottom wall of the first guide hole (21) and the second stop ring (524).

11. The gas injector according to any one of claims 1 to 9, characterized in that: The cross-sectional dimensions of the air jet (12) remain unchanged or gradually decrease or gradually increase along the air outlet direction.

12. The gas injector according to any one of claims 1 to 9, characterized in that: The invention also comprises a locking screw sleeve (10), wherein the locking screw sleeve (10) is screwed into the injector housing (1) by a thread, and the outer wall ring of the electromagnet (2) is provided with a second boss (22), the electromagnet (2) is inserted into the locking screw sleeve (10), and abuts against the end of the locking screw sleeve (10) through the second boss (22), and the locking screw sleeve (10) is screwed so that the electromagnet (2) is pressed against the limiting member (3).

13. A power system, characterized in that: Comprising the gas injector according to any one of claims 1-12.

14. A vehicle, characterized in that Comprising the power system as claimed in claim 13.

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