CN117189427A - Gas injector and vehicle - Google Patents

Abstract

The invention discloses a gas injector and a vehicle, wherein the gas injector comprises a gas inlet, a gas outlet, a gas inlet joint, a shell and a solenoid valve assembly; the housing includes a cavity extending in an axial direction; an electromagnetic valve component is arranged in the cavity; one end of the air inlet joint is communicated with the air inlet; the air inlet and the air outlet are arranged on two opposite sides of the shell along the axial direction; the electromagnet assembly and the armature are arranged along the axial direction; the electromagnet assembly and the armature are of hollow structures, and the cavity of the electromagnet assembly is respectively communicated with the cavity of the armature and the air inlet joint; the electromagnet assembly is used for attracting the armature to move along the axial direction when being electrified so as to enable the air inlet to be communicated with the air outlet, and keeping the armature stationary when not electrified, wherein the air inlet and the air outlet are isolated from each other; a damping structure is arranged in the cavity of the armature; the damping structure is used for providing a force opposite to the moving direction of the armature to the armature when the electromagnet assembly attracts the armature to move towards the side close to the air inlet in the axial direction.

Description

Gas injector and vehicle

Technical Field

The invention relates to the technical field of ejectors, in particular to a gas ejector and a vehicle.

Background

With the development of vehicle technology, vehicle energy sources extend from traditional fossil fuels to clean fuels such as low carbon or zero carbon gas. The gas injector is also called as a gas fuel injector, is one of key components in a gas fuel system, can realize timing and quantitative staged air inlet and air injection functions, and has very important influence on the power performance of the whole gas fuel system.

The gas injector generally has an electromagnetic assembly and a movable moving assembly, wherein the electromagnetic assembly generates electromagnetic force between the electromagnetic assembly and the armature after being electrified, and the electromagnetic force overcomes the spring force to drive the moving assembly to axially move between an open position and a closed position so as to realize the opening and the closing of the electromagnetic injection valve.

However, when the armature is driven by electromagnetic force to move in the gas injector, the armature has larger acceleration, so that the armature and the upper shell of the injector are impacted, the armature and the upper shell of the injector are worn, the lift of the armature is influenced, and the service life of the gas injector is shortened.

Disclosure of Invention

The invention provides a gas injector and a vehicle, which can prolong the service life of the gas injector.

In a first aspect, the present invention provides a gas injector comprising: the device comprises an air inlet, an air outlet, an air inlet connector, a shell and an electromagnetic valve assembly;

the housing includes a cavity extending in an axial direction; the electromagnetic valve assembly is arranged in the cavity; one end of the air inlet joint is communicated with the air inlet; the air inlet and the air outlet are arranged on two opposite sides of the shell along the axial direction;

the electromagnetic valve assembly comprises an electromagnet assembly and an armature, and the electromagnet assembly and the armature are arranged along the axial direction; the electromagnet assembly and the armature are of hollow structures, and the cavity of the electromagnet assembly is respectively communicated with the cavity of the armature and the air inlet joint; the electromagnet assembly is used for attracting the armature to move along the axial direction when being electrified so as to enable the air inlet to be communicated with the air outlet, and keeping the armature stationary when not electrified, wherein the air inlet and the air outlet are isolated from each other;

a damping structure is arranged in the cavity of the armature; the damping structure is used for providing a force opposite to the moving direction of the armature to the armature when the electromagnet assembly attracts the armature to move towards the side close to the air inlet along the axial direction.

Optionally, a protrusion is arranged on a surface of one side of the armature, which is close to the electromagnet assembly; when the electromagnet assembly is not electrified, a first gap is formed between the protrusion and the shell; the first gap has a size greater than 0 μm.

Optionally, a clamping groove is formed in the bottom of the cavity of the armature, and the damping structure is arranged in the clamping groove.

Optionally, the damping structure includes a damping shell; the damping shell comprises a damping cavity, and a reverse elastic piece is arranged in the damping cavity;

one end of the reverse elastic piece is propped against the surface of one side of the damping cavity, which is close to the air inlet, and the other end of the reverse elastic piece is propped against the bottom of the clamping groove;

a damping hole communicated with the damping cavity is formed in one side, close to the air inlet, of the damping shell; and a hole core is arranged in the damping hole.

Optionally, the electromagnetic valve assembly further comprises a thrust rod;

the thrust rod is arranged in the cavity of the electromagnet assembly; the thrust rod is used for limiting the displacement of the armature moving along the axial direction.

Optionally, the electromagnetic valve assembly further comprises a return elastic member;

one end of the return elastic piece is propped against the push stopping rod, and the other end of the return elastic piece is propped against the damping structure.

Optionally, the solenoid valve assembly further comprises a main elastic member;

one end of the main elastic piece is propped against the push stopping rod, and the other end of the main elastic piece is propped against the bottom of the cavity of the armature.

Optionally, the gas injector further comprises: a sealing seat;

the sealing seat is arranged on one side of the shell close to the air outlet; the seal seat comprises a seal seat circulation cavity; the seal seat circulation cavity is communicated with the air outlet;

when the electromagnet assembly is not electrified, the surface of one side of the armature, which is close to the air outlet, at least covers the seal seat circulation cavity, and the air inlet and the air outlet are not communicated with each other;

when the electromagnet assembly is electrified, the air inlet is communicated with the sealing seat circulation cavity through the cavity of the electromagnet assembly and the cavity of the armature.

Optionally, the gas injector further comprises: a seal;

the sealing element is positioned between the sealing seat and the armature, and the sealing element is at least arranged around the sealing seat circulation cavity;

the armature includes a recessed feature adjacent a side surface of the seal seat, at least a portion of the seal being located within the recessed feature.

In a second aspect, the present invention provides a vehicle comprising a gas injector according to the first aspect.

According to the technical scheme, the gas injector comprises the gas inlet, the gas outlet, the gas inlet connector, the shell and the electromagnetic valve assembly, the shell comprises a cavity extending along the axial direction, the electromagnetic valve assembly is arranged in the cavity, one end of the gas inlet connector is communicated with the gas inlet, the gas inlet and the gas outlet are arranged on two opposite sides of the shell along the axial direction, the electromagnetic valve assembly comprises the electromagnet assembly and the armature, the electromagnet assembly and the armature are arranged along the axial direction, the electromagnet assembly and the armature are of hollow structures, the cavity of the electromagnet assembly is respectively communicated with the cavity of the armature and the gas inlet connector, so that the armature is attracted to move along the axial direction when the electromagnet assembly is electrified, the air inlet and the gas outlet are communicated, the armature is kept stationary when the electromagnet assembly is not electrified, and the gas inlet and the gas outlet are mutually isolated. Through being provided with damping structure in the cavity of armature to when the armature is moved along axial direction towards the side that is close to the air inlet to the attraction armature of electromagnet assembly, provide the effort opposite with armature direction of movement for the armature, reduce the travel speed of armature, slow down the intensity of armature and casing striking, reduce the degree of wear that the armature caused because of striking, improve gas injector's life.

Drawings

FIG. 1 is a schematic diagram of a gas injector according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partial structure of the area A in FIG. 1;

fig. 3 is a schematic structural diagram of an armature in a gas injector according to an embodiment of the present invention;

FIG. 4 is a schematic view of a damping structure in a gas injector according to an embodiment of the present invention;

wherein reference numerals are as follows:

12. an air inlet; 13. an air outlet; 11. an air inlet joint; 4. a housing; 30. a solenoid valve assembly; x, axial direction; 3. an electromagnet assembly; 74. an armature; 77. a damping structure; 741. a protrusion; 742 (743), gas passages; H. a first gap; 744. a clamping groove; 773. a damping shell; 771. a damping chamber; 76. a reverse elastic member; 772. a damping hole; 78. a core; 71. a push stop rod; 73. a return elastic member; 72. a main elastic member; 8. a sealing seat; 81. a seal holder flow-through chamber; 79. a seal; 745. a concave structure.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

Fig. 1 is a schematic structural view of a gas injector according to an embodiment of the present invention, and fig. 2 is a schematic partial structural view of a region a in fig. 1, and referring to fig. 1 and 2, the gas injector includes a gas inlet 12, a gas outlet 13, a gas inlet joint 11, a housing 4, and a solenoid valve assembly 30; the housing 4 comprises a cavity extending in the axial direction X; a solenoid valve assembly 30 is arranged in the cavity; one end of the air inlet joint 11 is communicated with the air inlet 12; the air inlet 12 and the air outlet 13 are arranged on two opposite sides of the shell 4 along the axial direction X; the solenoid valve assembly 30 includes an electromagnet assembly 3 and an armature 74, the electromagnet assembly 3 and the armature 74 being aligned in the axial direction X; the electromagnet assembly 3 and the armature 74 are of hollow structures, and the cavity of the electromagnet assembly 3 is respectively communicated with the cavity of the armature 74 and the air inlet joint 11; the electromagnet assembly 3 is used for attracting the armature 74 to move along the axial direction X when being electrified so as to enable the air inlet 12 to be communicated with the air outlet 13, and keeping the armature 74 stationary when not being electrified, wherein the air inlet 12 and the air outlet 13 are isolated from each other; damping structure 77 is disposed within the cavity of armature 74; the damping structure 77 is used to provide a force to the armature 74 that is opposite to the direction of movement of the armature 74 when the electromagnet assembly 3 attracts the armature 74 to move in the axial direction X toward the side closer to the intake port 12.

Wherein the air inlet connector 11 is used for connecting the air inlet 12 and the cavity of the armature 74, so that the air passing through the air inlet 12 can enter the cavity of the armature 74, and the electromagnet assembly 3 comprises a coil and an iron core, so that when the coil is electrified, the inner iron core can generate an electromagnetic field, and the armature 74 is attracted to move along the axial direction X.

Specifically, when the electromagnet assembly 3 is not energized, gas enters the air inlet joint 11 from the air inlet 12, and enters the cavity of the armature 74 through the air inlet joint 11, but the armature 74 is kept still at this time, so that the gas of the air inlet 12 cannot reach the air outlet 13 through the armature 74, that is, the gas injector cannot inject the gas at this time; when the electromagnet assembly 3 is electrified, gas enters the air inlet joint 11 from the air inlet 12, enters the cavity of the armature 74 through the air inlet joint 11, and the armature 74 moves towards one side close to the air inlet 12 along the axial direction X under the action force of an electromagnetic field generated by the electromagnet assembly 3, so that the gas of the air inlet 12 can reach the air outlet 13 through the armature 74, namely, a gas injector can jet the gas at the moment; however, since the electromagnetic field generated when the electromagnet assembly 3 is energized is larger, so that the impact of the armature 74 on the housing 4 is serious in the moving process, the embodiment of the invention sets the damping structure 77 inside the armature 74, so as to provide a force opposite to the moving direction of the armature 74 to the armature 74 when the armature 74 moves towards the side close to the air inlet 12 along the axial direction X, reduce the moving speed of the armature 74, slow down the impact strength of the armature 74 and the housing 4, reduce the abrasion degree of the armature 74 caused by the impact, and improve the service life of the gas injector.

According to the technical scheme, the air injector comprises an air inlet, an air outlet, an air inlet connector, a shell and an electromagnetic valve assembly, wherein the shell comprises a cavity extending along the axial direction, the electromagnetic valve assembly is arranged in the cavity, one end of the air inlet connector is communicated with the air inlet, the air inlet and the air outlet are arranged on two opposite sides of the shell along the axial direction, the electromagnetic valve assembly comprises an electromagnet assembly and an armature, the electromagnet assembly and the armature are arranged along the axial direction, the electromagnet assembly and the armature are of hollow structures, the cavity of the electromagnet assembly is respectively communicated with the cavity of the armature and the air inlet connector, so that the armature is attracted to move along the axial direction when the electromagnet assembly is electrified, the air inlet is communicated with the air outlet, and the armature is kept static when the electromagnet assembly is not electrified, and the air inlet and the air outlet are mutually isolated. Through being provided with damping structure in the cavity of armature to when the armature is moved along axial direction towards the side that is close to the air inlet to the attraction armature of electromagnet assembly, provide the effort opposite with armature direction of movement for the armature, reduce the travel speed of armature, slow down the intensity of armature and casing striking, reduce the degree of wear that the armature caused because of striking, improve gas injector's life.

Alternatively, referring to fig. 1 and 2, the armature 74 is provided with a projection 741 on a side surface thereof adjacent to the electromagnet assembly 3; when the electromagnet assembly 3 is not energized, a first gap H is formed between the protrusion 741 and the housing 4; the first gap H has a size greater than 0 μm.

The first gap H may be set according to actual needs on the premise of being larger than 0 μm, and is not particularly limited herein. The first gap H is illustratively 2mm in size.

Specifically, if the size of the first gap H is smaller than or equal to 0 μm, the phase position of the armature 74 and the housing 4 is fixed, when the electromagnet assembly 3 is energized, the armature 74 cannot move toward the side close to the air inlet 12 in the axial direction X due to the blocking of the housing 4, so that the air inlet 12 cannot communicate with the air outlet 13, and the gas injector cannot realize gas injection, so that the first gap H between the protrusion 741 of the electromagnet assembly 3 and the housing 4 is required to be larger than 0 μm, so that when the electromagnet assembly 3 is energized, the armature 74 can move toward the side close to the air inlet 12 in the axial direction X by a certain distance under the electromagnetic force, so that the air inlet 12 communicates with the air outlet 13, and the gas injector realizes gas injection.

Optionally, fig. 3 is a schematic structural diagram of an armature in a gas injector according to an embodiment of the present invention, as shown in fig. 3, a clamping groove 744 is disposed at a bottom of a cavity of the armature 74, and a damping structure 77 is disposed in the clamping groove 744.

On the premise that the damping structure 77 can be placed in the clamping groove 744 and clamped by the clamping groove 744, the size and shape of the clamping groove 744 can be set according to the size and shape of the damping structure 77, and the exemplary clamping groove 744 is a square groove, and the portion of the damping structure 77 placed in the clamping groove 744 is also a square structure, and may be other, which is not specifically limited herein.

Specifically, if the damping structure 77 is not disposed inside the armature 74, under the condition that the electromagnet assembly 3 is energized, the armature 74 receives a larger electromagnetic force to generate a larger impact with the housing 4, so as to abrade the armature 74 and reduce the service life of the gas injector.

Optionally, fig. 4 is a schematic structural diagram of a damping structure in a gas injector according to an embodiment of the present invention, and referring to fig. 2, 3 and 4, a damping structure 77 includes a damping shell 773; the damping shell 773 comprises a damping cavity 771, and a reverse elastic piece 76 is arranged in the damping cavity 771; one end of the reverse elastic piece 76 abuts against the surface of one side of the damping cavity 771, which is close to the air inlet 12, and the other end of the reverse elastic piece 76 abuts against the bottom of the clamping groove 744; a damping hole 772 communicated with the damping cavity 771 is arranged on one side of the damping shell 773 close to the air inlet 12; a bore core 78 is disposed within the damping bore 772.

The reverse elastic member 76 includes an elastic device such as a spring, and may be configured according to actual needs, which is not particularly limited herein. The damping shell 773 and the hole core 78 of the damping structure 77 are respectively prepared, and then the hole core 78 is placed in the damping hole 772 of the damping shell 773, so that the manufacturing difficulty of the damping structure 77 is reduced, and the manufacturing efficiency is improved.

Specifically, the diameter of the damping orifice 772 in the damping shell 773 is slightly larger than the diameter of the orifice core 78 such that gas in the damping cavity 771 may bleed through the gap between the orifice core 78 and the damping orifice 772 into the cavity of the armature 74. When the electromagnet assembly 3 is energized, the armature 74 moves towards the side close to the air inlet 12 along the axial direction X under the action of the electromagnetic field generated by the electromagnet assembly 3, and at this time, the air entering the cavity of the armature 74 has a larger pressure, the pressure causes the damping structure 77 to move towards the side close to the air outlet 13 along the axial direction X, the reverse elastic member 76 is compressed, the second gap h between the bottom of the damping structure 77 and the bottom of the clamping groove 744 is reduced, but the gap between the damping hole 772 and the core 78 is smaller, so that the air in the damping cavity 771 cannot be released from the gap between the damping hole 772 and the core 78 in time, thereby generating an action force opposite to the electromagnetic force, slowing down the moving speed of the armature 74 towards the side close to the air inlet 12 along the axial direction X, slowing down the impact strength of the armature 74 and the housing 4, reducing the abrasion degree of the armature 74 caused by impact, and improving the service life of the air injector.

Optionally, referring to fig. 1 and 2, the solenoid valve assembly 30 further includes a thrust rod 71; the thrust rod 71 is arranged in the cavity of the electromagnet assembly 3; the stopper rod 71 serves to limit the displacement amount by which the armature 74 moves in the axial direction X.

Specifically, when the electromagnet assembly 3 is energized, the armature 74 moves to a side close to the air inlet 12 along the axial direction X under the action of the electromagnetic field generated by the electromagnet assembly 3, and when the electromagnet assembly 3 fails or the armature 74 fails to move a large distance along the axial direction X toward a side close to the air inlet 12, the movement limit of the armature 74 can be limited by the thrust rod 71, so that the problem that the armature 74 cannot be reset due to unrestricted movement is prevented, and the working reliability of the gas injector is improved.

Optionally, referring to fig. 1 and 2, the solenoid valve assembly 30 further includes a return spring 73; one end of the return elastic member 73 abuts against the thrust rod 71, and the other end of the return elastic member 73 abuts against the damping structure 77.

The return elastic member 73 includes a spring, and may be set according to actual needs, and is not particularly limited herein.

Specifically, when the electromagnet assembly 3 is not energized, the armature 74 is in a static state, the tension of the return elastic member 73 makes the bottom of the damping structure 77 and the bottom of the clamping groove 744 have a second gap h, and at this time, the gas pressure in the damping cavity 771 is consistent with the gas pressure in the cavity of the armature 74; when the electromagnet assembly 3 is powered on, the armature 74 moves towards the side close to the air inlet 12 along the axial direction X under the action of the electromagnetic field generated by the electromagnet assembly 3, at this time, the air entering the cavity of the armature 74 has a larger pressure, the damping structure 77 moves towards the side close to the air outlet 13 along the axial direction X, the reverse elastic member 76 is compressed, during the relative movement process of the damping structure 77 and the armature 74, when the second gap h between the bottom of the damping structure 77 and the bottom of the clamping groove 744 is 0, the armature 74 drives the damping structure 77 to move towards the side close to the air outlet 13 along the axial direction X, at this time, the return elastic member 73 is compressed, the distance between the damping structure 77 and the thrust rod 71 is reduced, the existence of the return elastic member 73 enables the damping structure 77 not to move to the junction of the thrust rod 71 and the cavity of the armature 74, so that the air circulation is prevented, and then when the electromagnet assembly 3 is powered off, the damping structure 77 returns to the initial position under the elastic force of the return elastic member 73, so that when the next electromagnet assembly 3 is powered on, the upper spraying process is repeatedly performed, the air inlet 12 is communicated with the air outlet 13, and the air can exit. The value of the second gap h may be set according to actual needs, and exemplary, the second gap h is 1mm, which is not specifically limited herein.

Optionally, referring to fig. 1 and 2, the solenoid valve assembly 30 further includes a primary spring 72; one end of the main elastic member 72 abuts against the push stop rod 71, and the other end of the main elastic member 72 abuts against the bottom of the cavity of the armature 74.

The main elastic member 72 includes a spring, and may be set according to actual needs, which is not particularly limited herein.

Specifically, when electromagnet assembly 3 is not energized, the tension of main spring 72 itself causes armature 74 to be in a stationary fixed position, at which time the gas pressure within damping chamber 771 is consistent with the gas pressure of the cavity of armature 74; when the electromagnet assembly 3 is powered on, the armature 74 moves to a side close to the air inlet 12 along the axial direction X under the action of an electromagnetic field generated by the electromagnet assembly 3, the main elastic element 72 is compressed, the distance between the armature 74 and the thrust rod 71 is reduced, the main elastic element 72 enables the armature 74 not to move to the connection between the thrust rod 71 and the cavity of the armature 74, the air circulation is prevented from being blocked, then when the electromagnet assembly 3 is powered off, the armature 74 is restored to the initial position under the action of the elastic force of the main elastic element 72, so that the flow is repeatedly executed when the electromagnet assembly 3 is powered on next time, the air inlet 12 is communicated with the air outlet 13, and the air injector can emit air.

Optionally, referring to fig. 1, 2 and 3, the gas injector further comprises: a seal seat 8; the seal seat 8 is arranged on one side of the shell 4 close to the air outlet 13; the seal holder 8 includes a seal holder flow-through cavity 81; the seal seat circulation cavity 81 is communicated with the air outlet 13; when the electromagnet assembly 3 is not electrified, at least the surface of one side of the armature 74, which is close to the air outlet 13, covers the seal seat circulation cavity 81, and the air inlet 12 and the air outlet 13 are not communicated with each other; when the electromagnet assembly 3 is energized, the air inlet 12 is communicated with the seal seat circulation cavity 81 through the cavity of the electromagnet assembly 3 and the cavity of the armature 74.

Specifically, when electromagnet assembly 3 is not energized, the surface of armature 74 on the side near air outlet 13 covers at least seal seat flow chamber 81, and air entering the cavity of armature 74 cannot reach seal seat flow chamber 81 through air passages 742 and 743 of armature 74, and air inlet 12 and air outlet 13 are not in communication with each other; when the electromagnet assembly 3 is energized, the armature 74 moves along the axial direction X toward the side near the air inlet 12 under the force of the electromagnetic field generated by the electromagnet assembly 3, the surface of the side of the armature 74 near the air outlet 13 cannot continue to cover the seal seat circulation cavity 81, and the air entering the cavity of the armature 74 can reach the seal seat circulation cavity 81 through the air passages 742 and 743 of the armature 74, so that the air inlet 12 is communicated with the air outlet 13, and the air injector can emit the air.

Optionally, referring to fig. 2 and 3, the gas injector further comprises: a seal 79; a seal 79 is positioned between the seal seat 8 and the armature 74, the seal 79 being disposed at least around the seal seat flow chamber 81; the side surface of armature 74 adjacent seal seat 8 includes a recessed feature 745 and at least a portion of seal 79 is located within recessed feature 745.

Specifically, when the electromagnet assembly 3 is energized, the armature 74 moves along the axial direction X toward the side close to the air inlet 12 under the action of the electromagnetic field generated by the electromagnet assembly 3, the surface of the side of the armature 74 close to the air outlet 13 cannot continuously cover the seal seat circulation cavity 81, and the air entering the cavity of the armature 74 can reach the seal seat circulation cavity 81 through the air passages 742 and 743 of the armature 74, at this time, the seal 79 deforms under the action of the high-pressure air, so that the air circulation rate of the air inlet 12 and the air outlet 13 is improved; when the electromagnet assembly 3 is not energized, at least the surface of the side of the armature 74, which is close to the air outlet 13, covers the seal seat circulation cavity 81, and the air entering the cavity of the armature 74 cannot reach the seal seat circulation cavity 81 through the air passages 742 and 743 of the armature 74, at this time, the seal 79 is restored to the original state from the deformed state, so that the air inlet 12 and the air outlet 13 are prevented from communicating with each other, and the air tightness is improved.

Based on the same inventive concept, the embodiment of the invention also provides a vehicle comprising the gas injector provided by the invention. Therefore, the vehicle has the technical characteristics of the gas injector provided by the embodiment of the invention, and can achieve the beneficial effects of the gas injector provided by the embodiment of the invention, and the same points can be referred to the description of the gas injector provided by the embodiment of the invention, and the description is omitted here.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. A gas injector, comprising: the device comprises an air inlet (12), an air outlet (13), an air inlet joint (11), a shell (4) and a solenoid valve assembly (30);

the housing (4) comprises a cavity extending in an axial direction (X); the electromagnetic valve assembly (30) is arranged in the cavity; one end of the air inlet joint (11) is communicated with the air inlet (12); the air inlet (12) and the air outlet (13) are arranged on two opposite sides of the shell (4) along the axial direction (X);

the electromagnetic valve assembly (30) comprises an electromagnet assembly (3) and an armature (74), wherein the electromagnet assembly (3) and the armature (74) are arranged along the axial direction (X); the electromagnet assembly (3) and the armature (74) are of hollow structures, and the cavity of the electromagnet assembly (3) is respectively communicated with the cavity of the armature (74) and the air inlet joint (11); -the electromagnet assembly (3) being adapted to attract the armature (74) to move in the axial direction (X) when energized, so as to bring the air inlet (12) into communication with the air outlet (13), and-the armature (74) being kept stationary when not energized, the air inlet (12) being isolated from the air outlet (13);

a damping structure (77) is arranged in the cavity of the armature (74); the damping structure (77) is configured to provide a force to the armature (74) opposite to a moving direction of the armature (74) when the electromagnet assembly (3) attracts the armature (74) to move in the axial direction (X) toward a side near the air intake port (12).

2. A gas injector according to claim 1, characterized in that a side surface of the armature (74) adjacent to the electromagnet assembly (3) is provided with a protrusion (741); when the electromagnet assembly (3) is not electrified, a first gap (H) is formed between the protrusion (741) and the shell (4); the first gap (H) has a size greater than 0 μm.

3. The gas injector of claim 1, characterized in that a cavity bottom of the armature (74) is provided with a clamping groove (744), and the damping structure (77) is provided in the clamping groove (744).

4. A gas injector according to claim 3, characterized in that the damping structure (77) comprises a damping shell (773); the damping shell (773) comprises a damping cavity (771), and a reverse elastic piece (76) is arranged in the damping cavity (771);

one end of the reverse elastic piece (76) is propped against the surface of one side of the damping cavity (771) close to the air inlet (12), and the other end of the reverse elastic piece (76) is propped against the bottom of the clamping groove (744);

a damping hole (772) communicated with the damping cavity (771) is formed in one side, close to the air inlet (12), of the damping shell (773); a hole core (78) is arranged in the damping hole (772).

5. The gas injector of claim 1, wherein the solenoid valve assembly (30) further comprises a thrust rod (71);

the thrust rod (71) is arranged in the cavity of the electromagnet assembly (3); the thrust rod (71) is used for limiting the displacement of the armature (74) along the axial direction (X).

6. The gas injector of claim 5, wherein the solenoid valve assembly (30) further comprises a return spring (73);

one end of the return elastic piece (73) is propped against the push stopping rod (71), and the other end of the return elastic piece (73) is propped against the damping structure (77).

7. The gas injector of claim 5, wherein the solenoid valve assembly (30) further comprises a primary spring (72);

one end of the main elastic piece (72) is propped against the push stopping rod (71), and the other end of the main elastic piece (72) is propped against the bottom of the cavity of the armature (74).

8. The gas injector of claim 1, further comprising: a seal seat (8);

the sealing seat (8) is arranged at one side of the shell (4) close to the air outlet (13); the sealing seat (8) comprises a sealing seat circulation cavity (81); the seal seat circulation cavity (81) is communicated with the air outlet (13);

when the electromagnet assembly (3) is not electrified, at least one side surface of the armature (74) close to the air outlet (13) covers the seal seat circulation cavity (81), and the air inlet (12) is not communicated with the air outlet (13);

when the electromagnet assembly (3) is electrified, the air inlet (12) is communicated with the sealing seat circulation cavity (81) through the cavity of the electromagnet assembly (3) and the cavity of the armature (74).

9. The gas injector of claim 8, further comprising: a seal (79);

the seal (79) is located between the seal seat (8) and the armature (74), the seal (79) being disposed at least around the seal seat flow chamber (81);

a side surface of the armature (74) adjacent the seal seat (8) includes a recess formation (745), at least part of the seal (79) being located within the recess formation (745).

10. A vehicle, characterized by comprising: a gas injector as claimed in any one of claims 1 to 9.