Gas injector and vehicle

Abstract

The present invention discloses a gas injector and a vehicle, wherein the gas injector comprises an air inlet, an air outlet, an air inlet connector, a shell and an electromagnetic valve assembly; the shell comprises a cavity extending in an axial direction; an electromagnetic valve assembly is arranged in the cavity; one end of the air inlet connector is connected with the air inlet; the air inlet and the air outlet are arranged on opposite sides of the shell in the axial direction; the electromagnet assembly and the armature are arranged in the axial direction; the electromagnet assembly and the armature are both hollow structures, and the cavity of the electromagnet assembly is respectively connected with the cavity of the armature and the air inlet connector; the electromagnet assembly is used to attract the armature to move in the axial direction when power is supplied, so as to connect the air inlet with the air outlet, and when power is not supplied, the armature remains stationary and 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 to provide a force opposite to the moving direction of the armature to the armature when the electromagnet assembly attracts the armature to move in the axial direction toward the side close to the air inlet.

Description

Technical Field

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

[0002] With the development of vehicle technology, vehicle energy has extended from traditional fossil fuels to clean fuels such as low-carbon or zero-carbon gas. Gas injectors, also known as gas fuel injectors, are one of the core key components in gas fuel systems. They can realize the functions of timing, quantitative staged intake and injection. Their performance has a very important impact on the power performance of the overall gas fuel system.

[0003] The gas injector usually has an electromagnetic component and a movable moving component. When the electromagnetic component is energized, an electromagnetic force is generated between the electromagnetic component and the armature. The electromagnetic force overcomes the spring force and drives the moving component to move axially between the open position and the closed position, thereby realizing the opening and closing of the electromagnetic injection valve.

[0004] However, when the electromagnetic force inside the gas injector drives the armature to move, the armature has a large acceleration, causing the armature to collide with the injector upper shell, resulting in wear of the armature and the injector upper shell, affecting the armature lift and shortening the service life of the gas injector. Summary of the invention

[0005] The invention provides a gas injector and a vehicle, which can prolong the service life of the gas injector.

[0006] In a first aspect, the present invention provides a gas injector, comprising: an air inlet, an air outlet, an air inlet connector, a housing, and a solenoid valve assembly;

[0007] The housing comprises a cavity extending in an axial direction; the solenoid valve assembly is arranged in the cavity; one end of the air inlet connector is connected to the air inlet; the air inlet and the air outlet are arranged on opposite sides of the housing along the axial direction;

[0008] The solenoid valve assembly comprises an electromagnet assembly and an armature, wherein the electromagnet assembly and the armature are arranged along the axial direction; the electromagnet assembly and the armature are both hollow structures, and the cavity of the electromagnet assembly is respectively connected with the cavity of the armature and the air inlet joint; the electromagnet assembly is used to attract the armature to move along the axial direction when power is supplied, so that the air inlet is connected with the air outlet, and when power is not supplied, the armature remains stationary, and the air inlet is isolated from the air outlet;

[0009] A damping structure is arranged in the cavity of the armature; the damping structure is used to provide a force opposite to the moving direction of the armature to the armature when the electromagnet assembly attracts the armature to move along the axial direction toward the side close to the air inlet.

[0010] Optionally, a protrusion is provided on a surface of one side of the armature close to the electromagnet assembly; when the electromagnet assembly is not energized, a first gap is provided between the protrusion and the shell; and a size of the first gap is greater than 0 μm.

[0011] Optionally, a slot is provided at the bottom of the cavity of the armature, and the damping structure is provided in the slot.

[0012] Optionally, the damping structure includes a damping shell; the damping shell includes a damping cavity, and a reverse elastic member is arranged in the damping cavity;

[0013] One end of the reverse elastic member abuts against a side surface of the damping chamber close to the air inlet, and the other end of the reverse elastic member abuts against a bottom of the slot;

[0014] A damping hole communicating with the damping cavity is arranged on one side of the damping shell close to the air inlet; a hole core is arranged in the damping hole.

[0015] Optionally, the solenoid valve assembly further includes a thrust rod;

[0016] The thrust rod is arranged in the cavity of the electromagnet assembly; the thrust rod is used to limit the displacement of the armature along the axial direction.

[0017] Optionally, the solenoid valve assembly further includes a return elastic member;

[0018] One end of the return elastic member abuts against the thrust rod, and the other end of the return elastic member abuts against the damping structure.

[0019] Optionally, the solenoid valve assembly further includes a main elastic member;

[0020] One end of the main elastic member abuts against the thrust rod, and the other end of the main elastic member abuts against the bottom of the cavity of the armature.

[0021] Optionally, the gas injector further comprises: a sealing seat;

[0022] The sealing seat is arranged on a side of the housing close to the air outlet; the sealing seat comprises a sealing seat circulation cavity; the sealing seat circulation cavity is communicated with the air outlet;

[0023] When the electromagnet assembly is not energized, the surface of one side of the armature close to the air outlet at least covers the flow cavity of the sealing seat, and the air inlet and the air outlet are not connected to each other;

[0024] When the electromagnet assembly is energized, the air inlet is communicated with the sealing seat flow cavity through the cavity of the electromagnet assembly and the cavity of the armature.

[0025] Optionally, the gas injector further comprises: a sealing member;

[0026] The sealing member is located between the sealing seat and the armature, and the sealing member is at least arranged around the flow cavity of the sealing seat;

[0027] A side surface of the armature close to the sealing seat comprises a recessed structure, and at least a portion of the sealing element is located in the recessed structure.

[0028] In a second aspect, the present invention provides a vehicle, comprising the gas injector according to the first aspect.

[0029] The technical solution provided by the present invention is that the gas injector includes an air inlet, an air outlet, an air inlet connector, a shell and a solenoid valve assembly, the shell includes a cavity extending in an axial direction, the solenoid valve assembly is arranged in the cavity, one end of the air inlet connector is connected with the air inlet, the air inlet and the air outlet are arranged on opposite sides of the shell in the axial direction, the solenoid valve assembly includes an electromagnet assembly and an armature, the electromagnet assembly and the armature are arranged in the axial direction, the electromagnet assembly and the armature are both hollow structures, and the cavity of the electromagnet assembly is respectively connected with the cavity of the armature and the air inlet connector, so that when the electromagnet assembly is energized, the armature is attracted to move in the axial direction to connect the air inlet with the air outlet, and when the electromagnet assembly is not energized, the armature remains stationary, and the air inlet and the air outlet are isolated from each other. By arranging a damping structure in the cavity of the armature, when the electromagnet assembly attracts the armature to move along the axial direction toward the side close to the air inlet, a force opposite to the moving direction of the armature is provided to the armature, thereby reducing the moving speed of the armature, reducing the intensity of the impact between the armature and the housing, reducing the degree of wear of the armature caused by the impact, and improving the service life of the gas injector. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a gas injector provided in an embodiment of the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the local structure of the middle area A;

[0032] Figure 3 A schematic diagram of the structure of an armature in a gas injector provided in an embodiment of the present invention;

[0033] Figure 4 A schematic structural diagram of a damping structure in a gas injector provided in an embodiment of the present invention;

[0034] The reference numerals are described as follows:

[0035] 12. Air inlet; 13. Air outlet; 11. Air inlet connector; 4. Shell; 30. Solenoid valve assembly; X. Axial direction; 3. Electromagnet assembly; 74. Armature; 77. Damping structure; 741. Protrusion; 742 (743) , Gas channel; H. First gap; 744. Slot; 773. Damping shell; 771. Damping chamber; 76. Reverse elastic member; 772. Damping hole; 78. Hole core; 71. Thrust rod; 73. Return elastic member; 72. Main elastic member; 8. Sealing seat; 81. Sealing seat flow chamber; 79. Sealing member; 745. Recessed structure. DETAILED DESCRIPTION

[0036] 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.

[0037] Figure 1 A schematic diagram of the structure of a gas injector provided in an embodiment of the present invention, Figure 2 for Figure 1 Schematic diagram of the local structure of area A, see Figure 1 and Figure 2 The gas injector comprises an air inlet 12, an air outlet 13, an air inlet connector 11, a housing 4 and a solenoid valve assembly 30; the housing 4 comprises a cavity extending in the axial direction X; the solenoid valve assembly 30 is arranged in the cavity; one end of the air inlet connector 11 is connected to the air inlet 12; the air inlet 12 and the air outlet 13 are arranged on opposite sides of the housing 4 in the axial direction X; the solenoid valve assembly 30 comprises an electromagnet assembly 3 and an armature 74, the electromagnet assembly 3 and the armature 74 are arranged in the axial direction X; the electromagnet assembly 3 and the armature 74 are both hollow structures, and the electromagnet assembly 3 The cavity is respectively connected with the cavity of the armature 74 and the air inlet connector 11; the electromagnet assembly 3 is used to attract the armature 74 to move along the axial direction X when power is supplied, so that the air inlet 12 is connected with the air outlet 13, and when power is not supplied, the armature 74 remains stationary and the air inlet 12 and the air outlet 13 are isolated from each other; a damping structure 77 is provided in the cavity of the armature 74; the damping structure 77 is used to provide a force opposite to the moving direction of the armature 74 when the electromagnet assembly 3 attracts the armature 74 to move along the axial direction X toward the side close to the air inlet 12.

[0038] Among them, the air inlet connector 11 is used to connect the air inlet 12 and the cavity of the armature 74, so that the gas passing through the air inlet 12 can enter the cavity of the armature 74, and the electromagnet assembly 3 includes a coil and an iron core, so that when the coil is energized, the internal iron core can generate an electromagnetic field, thereby attracting the armature 74 to move along the axial direction X.

[0039] Specifically, when the electromagnet assembly 3 is not energized, the gas enters the air inlet connector 11 from the air inlet 12, and enters the cavity of the armature 74 through the air inlet connector 11, but the armature 74 remains stationary at this time, so that the gas at the air inlet 12 cannot pass through the armature 74 to reach the air outlet 13, that is, the gas injector cannot inject gas at this time; when the electromagnet assembly 3 is energized, the gas enters the air inlet connector 11 from the air inlet 12, and enters the cavity of the armature 74 through the air inlet connector 11. Under the force of the electromagnetic field generated by the electromagnet assembly 3, the armature 74 moves along the axial direction X to the side close to the air inlet 12, so that the gas at the air inlet 12 can The gas reaches the gas outlet 13 through the armature 74, that is, the gas injector can inject gas at this time; however, since the electromagnetic field generated when the electromagnet assembly 3 is energized is relatively large, the armature 74 hits the shell 4 more seriously during movement. Therefore, the embodiment of the present invention provides a damping structure 77 inside the armature 74 to provide the armature 74 with a force opposite to the moving direction of the armature 74 when the armature 74 moves along the axial direction X toward the side close to the air inlet 12, thereby reducing the moving speed of the armature 74, reducing the intensity of the impact between the armature 74 and the shell 4, reducing the degree of wear of the armature 74 caused by the impact, and improving the service life of the gas injector.

[0040] The technical solution of the embodiment of the present invention is that the gas injector includes an air inlet, an air outlet, an air inlet connector, a shell and a solenoid valve assembly, the shell includes a cavity extending in an axial direction, the solenoid valve assembly is arranged in the cavity, one end of the air inlet connector is connected with the air inlet, the air inlet and the air outlet are arranged on opposite sides of the shell in the axial direction, the solenoid valve assembly includes an electromagnet assembly and an armature, the electromagnet assembly and the armature are arranged in the axial direction, the electromagnet assembly and the armature are both hollow structures, and the cavity of the electromagnet assembly is respectively connected with the cavity of the armature and the air inlet connector, so that when the electromagnet assembly is energized, the armature is attracted to move in the axial direction to connect the air inlet and the air outlet, and when the electromagnet assembly is not energized, the armature remains stationary, and the air inlet and the air outlet are isolated from each other. By arranging a damping structure in the cavity of the armature, when the electromagnet assembly attracts the armature to move along the axial direction toward the side close to the air inlet, a force opposite to the moving direction of the armature is provided to the armature, thereby reducing the moving speed of the armature, reducing the intensity of the impact between the armature and the housing, reducing the degree of wear of the armature caused by the impact, and improving the service life of the gas injector.

[0041] Optional, reference Figure 1 and Figure 2A protrusion 741 is provided on the surface of one side of the armature 74 close to the electromagnet assembly 3; when the electromagnet assembly 3 is not energized, a first gap H is provided between the protrusion 741 and the housing 4; and the size of the first gap H is greater than 0 μm.

[0042] Wherein, the first gap H can be set according to actual needs under the premise of being greater than 0 μm, and is not specifically limited here. For example, the size of the first gap H is 2 mm.

[0043] Specifically, if the size of the first gap H is less than or equal to 0 μm, the phase position of the armature 74 and the shell 4 is fixed. When the electromagnet assembly 3 is energized, the armature 74 is blocked by the shell 4 and cannot move along the axial direction X toward the side close to the air inlet 12, thereby making the air inlet 12 and the air outlet 13 unable to communicate, and the gas injector cannot achieve gas injection. Therefore, the first gap H between the protrusion 741 of the electromagnet assembly 3 and the shell 4 needs to be greater than 0 μm, so that when the electromagnet assembly 3 is energized, the armature 74 can move a certain distance along the axial direction X toward the side close to the air inlet 12 under the action of the electromagnetic force, thereby making the air inlet 12 and the air outlet 13 connected, and the gas injector can achieve gas injection.

[0044] Optional, Figure 3 A schematic diagram of the structure of the armature in the gas injector provided in an embodiment of the present invention is shown in FIG. Figure 3 As shown, a slot 744 is provided at the bottom of the cavity of the armature 74 , and the damping structure 77 is provided in the slot 744 .

[0045] Among them, under the premise that the damping structure 77 can be placed in the slot 744 and be stuck in the slot 744, the size and shape of the slot 744 can be set according to the size and shape of the damping structure 77. Exemplarily, the slot 744 is a cubic groove, and the part of the damping structure 77 placed in the slot 744 is also a cubic structure. It can also be other shapes, which are not specifically limited here.

[0046] Specifically, if the damping structure 77 is not provided inside the armature 74, then when the electromagnet assembly 3 is energized, the armature 74 receives a large electromagnetic force and produces a large force impact with the shell 4, which wears the armature 74 and reduces the service life of the gas injector. The present invention provides a slot 744 at the bottom of the cavity of the armature and arranges the damping structure 77 in the slot 744, so that when the armature 74 moves along the axial direction X toward the side close to the air inlet 12, the armature 74 is provided with a force opposite to the moving direction of the armature 74, thereby reducing the moving speed of the armature 74, reducing the intensity of the impact between the armature 74 and the shell 4, reducing the degree of wear of the armature 74 caused by the impact, and improving the service life of the gas injector.

[0047] Optional, Figure 4A schematic diagram of the structure of the damping structure in the gas injector provided in the embodiment of the present invention, referring to Figure 2 , Figure 3 and Figure 4 The damping structure 77 includes a damping shell 773; the damping shell 773 includes a damping chamber 771, and a reverse elastic member 76 is arranged in the damping chamber 771; one end of the reverse elastic member 76 abuts against the surface of one side of the damping chamber 771 close to the air inlet 12, and the other end of the reverse elastic member 76 abuts against the bottom of the slot 744; a damping hole 772 connected to the damping chamber 771 is arranged on the side of the damping shell 773 close to the air inlet 12; a hole core 78 is arranged in the damping hole 772.

[0048] The reverse elastic member 76 includes elastic devices such as springs, which can be set according to actual needs and are not specifically limited here. The damping shell 773 and the hole core 78 of the damping structure 77 are prepared separately, and then the hole core 78 is placed in the damping hole 772 of the damping shell 773, which reduces the difficulty of manufacturing the damping structure 77 and improves the manufacturing efficiency.

[0049] Specifically, the diameter of the damping hole 772 in the damping shell 773 is slightly larger than the diameter of the hole core 78 , so that the gas in the damping chamber 771 can be discharged into the cavity of the armature 74 through the gap between the hole core 78 and the damping hole 772 . 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 force of the electromagnetic field generated by the electromagnet assembly 3. At this time, the gas entering the cavity of the armature 74 has a large pressure, which causes the damping structure 77 to move along the axial direction X toward the side close to the air outlet 13. The reverse elastic member 76 is compressed, and the second gap h between the bottom of the damping structure 77 and the bottom of the slot 744 is reduced. However, the gap between the damping hole 772 and the hole core 78 is small, so that the gas in the damping chamber 771 cannot be released in time from the gap between the damping hole 772 and the hole core 78, thereby generating a force opposite to the electromagnetic force, slowing down the movement speed of the armature 74 along the axial direction X toward the side close to the air inlet 12, slowing down the intensity of the impact between the armature 74 and the housing 4, reducing the degree of wear of the armature 74 caused by the impact, and improving the service life of the gas injector.

[0050] Optional, reference Figure 1 and Figure 2 The solenoid valve assembly 30 also includes a thrust rod 71; the thrust rod 71 is arranged in the cavity of the electromagnet assembly 3; the thrust rod 71 is used to limit the displacement of the armature 74 along the axial direction X.

[0051] Specifically, the thrust rod 71 is fixedly connected to the housing 4. 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 force of the electromagnetic field generated by the electromagnet assembly 3. When the electromagnet assembly 3 fails or the armature 74 fails, causing the armature 74 to move a large distance along the axial direction X toward the side close to the air inlet 12, the thrust rod 71 can limit the movement limit of the armature 74, preventing the armature 74 from moving without restriction and causing the armature 74 to be unable to reset, thereby improving the working reliability of the gas injector.

[0052] Optional, reference Figure 1 and Figure 2 The solenoid valve assembly 30 further includes a return elastic member 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 .

[0053] The return elastic member 73 includes a spring, which can be configured according to actual needs and is not specifically limited here.

[0054] Specifically, when the electromagnet assembly 3 is not energized, the armature 74 is in a stationary state, and the tension of the return elastic member 73 itself causes the bottom of the damping structure 77 and the bottom of the slot 744 to have a second gap h. At this time, the gas pressure in the damping chamber 771 is consistent with the gas pressure in the armature 74 cavity; when the electromagnet assembly 3 is energized, the armature 74 moves along the axial direction X to the side close to the air inlet 12 under the force of the electromagnetic field generated by the electromagnet assembly 3. At this time, the gas entering the cavity of the armature 74 has a large pressure, which causes the damping structure 77 to move along the axial direction X toward the side close to the air outlet 13, and the reverse elastic member 76 is compressed. During the relative movement 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 slot 744 is 0, the armature 74 will drive the damping structure 77 to move along the axial direction X toward the side close to the air outlet 13. At this time, the return elastic member 73 is compressed, and the distance between the damping structure 77 and the thrust rod 71 is reduced. The existence of the return elastic member 73 prevents the damping structure 77 from moving to the connection between the thrust rod 71 and the cavity of the armature 74 to prevent the obstruction of gas circulation. Afterwards, when the electromagnet assembly 3 is powered off, the damping structure 77 is restored to the initial position under the elastic force of the return elastic member 73, so that the next time the electromagnet assembly 3 is powered on, the above process is repeated, so that the air inlet 12 is connected to the air outlet 13, and the gas injector can emit gas. Among them, the value of the second gap h can be set according to actual needs. For example, the second gap h is 1 mm, which is not specifically limited here.

[0055] Optional, reference Figure 1 and Figure 2The solenoid valve assembly 30 further includes a main elastic member 72 ; one end of the main elastic member 72 abuts against the thrust rod 71 , and the other end of the main elastic member 72 abuts against the bottom of the cavity of the armature 74 .

[0056] Among them, the main elastic member 72 includes a spring, which can be configured according to actual needs and is not specifically limited here.

[0057] Specifically, when the electromagnet assembly 3 is not energized, the tension of the main elastic member 72 itself causes the armature 74 to be in a stationary fixed position, at which time the gas pressure in the damping chamber 771 is consistent with the gas pressure in the armature 74 cavity; when the electromagnet assembly 3 is energized, the armature 74 moves along the axial direction X to the side close to the air inlet 12 under the action of the electromagnetic field generated by the electromagnet assembly 3, the main elastic member 72 is compressed, and the distance between the armature 74 and the thrust rod 71 is reduced. The existence of the main elastic member 72 prevents the armature 74 from moving to the connection between the thrust rod 71 and the armature 74 cavity, thereby preventing obstruction of gas circulation. Thereafter, when the electromagnet assembly 3 is de-energized, the armature 74 is restored to its initial position under the elastic force of the main elastic member 72, so that the next time the electromagnet assembly 3 is energized, the above process is repeated, so that the air inlet 12 is connected to the air outlet 13, and the gas injector can emit gas.

[0058] Optional, reference Figure 1 , Figure 2 and Figure 3 The gas injector also includes: a sealing seat 8; the sealing seat 8 is arranged on a side of the shell 4 close to the air outlet 13; the sealing seat 8 includes a sealing seat circulation cavity 81; the sealing seat circulation cavity 81 is connected with the air outlet 13; when the electromagnet assembly 3 is not energized, the surface of the armature 74 on one side close to the air outlet 13 at least covers the sealing seat circulation cavity 81, and the air inlet 12 and the air outlet 13 are not connected with each other; when the electromagnet assembly 3 is energized, the air inlet 12 is connected with the sealing seat circulation cavity 81 through the cavity of the electromagnet assembly 3 and the cavity of the armature 74.

[0059] Specifically, when the electromagnet assembly 3 is not energized, the surface of one side of the armature 74 close to the air outlet 13 at least covers the sealing seat circulation chamber 81, and the gas entering the cavity of the armature 74 cannot reach the sealing seat circulation chamber 81 through the gas channels 742 and 743 of the armature 74, and the air inlet 12 and the air outlet 13 are not connected to each other; when the electromagnet assembly 3 is energized, the armature 74 moves along the axial direction X to the side close to the air inlet 12 under the action of the electromagnetic field generated by the electromagnet assembly 3, and the surface of one side of the armature 74 close to the air outlet 13 cannot continue to cover the sealing seat circulation chamber 81, and the gas entering the cavity of the armature 74 can reach the sealing seat circulation chamber 81 through the gas channels 742 and 743 of the armature 74, so that the air inlet 12 is connected to the air outlet 13, and the gas injector can emit gas.

[0060] Optional, reference Figure 2 and Figure 3 The gas injector also includes: a sealing member 79; the sealing member 79 is located between the sealing seat 8 and the armature 74, and the sealing member 79 is at least arranged around the sealing seat flow cavity 81; a side surface of the armature 74 close to the sealing seat 8 includes a recessed structure 745, and at least a portion of the sealing member 79 is located in the recessed structure 745.

[0061] Specifically, when the electromagnet assembly 3 is energized, the armature 74 moves along the axial direction X to the side close to the air inlet 12 under the force of the electromagnetic field generated by the electromagnet assembly 3, and the surface of the side of the armature 74 close to the air outlet 13 cannot continue to cover the sealing seat circulation cavity 81. The gas entering the cavity of the armature 74 can reach the sealing seat circulation cavity 81 through the gas channels 742 and 743 of the armature 74. At this time, the seal 79 is deformed under the action of the high-pressure gas, thereby improving the gas circulation rate between the air inlet 12 and the air outlet 13; when the electromagnet assembly 3 is not energized, the surface of the side of the armature 74 close to the air outlet 13 at least covers the sealing seat circulation cavity 81, and the gas entering the cavity of the armature 74 cannot reach the sealing seat circulation cavity 81 through the gas channels 742 and 743 of the armature 74. At this time, the seal 79 recovers from the deformed state to the original state, preventing the air inlet 12 and the air outlet 13 from being connected to each other, thereby improving the gas sealing.

[0062] Based on the same inventive concept, an embodiment of the present invention further provides a vehicle, which includes the gas injector provided by the present invention. Therefore, the vehicle has the technical features of the gas injector provided by the embodiment of the present invention, and can achieve the beneficial effects of the gas injector provided by the embodiment of the present invention. The similarities can be referred to the above description of the gas injector provided by the embodiment of the present invention, and will not be repeated here.

[0063] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A gas injector, characterized in that: include: An air inlet (12), an air outlet (13), an air inlet connector (11), a housing (4) and a solenoid valve assembly (30); The housing (4) comprises a cavity extending along an axial direction (X); the solenoid valve assembly (30) is arranged in the cavity; one end of the air inlet connector (11) is in communication with the air inlet (12); the air inlet (12) and the air outlet (13) are arranged on opposite sides of the housing (4) along the axial direction (X); The solenoid 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 both hollow structures, and the cavity of the electromagnet assembly (3) is respectively connected to the cavity of the armature (74) and the air inlet connector (11); the electromagnet assembly (3) is used to attract the armature (74) to move along the axial direction (X) when power is supplied, so that the air inlet (12) is connected to the air outlet (13); and when power is not supplied, the armature (74) remains stationary, and the air inlet (12) and the air outlet (13) are isolated from each other; A damping structure (77) is provided in the cavity of the armature (74); the damping structure (77) is used to provide a force acting on the armature (74) in the opposite direction of the movement of the armature (74) when the electromagnet assembly (3) attracts the armature (74) to move along the axial direction (X) towards a side close to the air inlet (12); A slot (744) is provided at the bottom of the cavity of the armature (74), and the damping structure (77) is arranged in the slot (744); Wherein, the damping structure (77) comprises a damping shell (773); the damping shell (773) comprises a damping cavity (771), and a reverse elastic member (76) is arranged in the damping cavity (771); One end of the reverse elastic member (76) abuts against a side surface of the damping chamber (771) close to the air inlet (12), and the other end of the reverse elastic member (76) abuts against a bottom of the slot (744); A damping hole (772) communicating with the damping cavity (771) is provided on one side of the damping shell (773) close to the air inlet (12); a hole core (78) is provided in the damping hole (772).

2. The gas injector according to claim 1, characterized in that A protrusion (741) is provided on a surface of one side of the armature (74) close to the electromagnet assembly (3); when the electromagnet assembly (3) is not energized, a first gap (H) is provided between the protrusion (741) and the housing (4); and a size of the first gap (H) is greater than 0 μm.

3. The gas injector according to claim 1, characterized in that 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 to limit the displacement of the armature (74) along the axial direction (X).

4. The gas injector according to claim 3, characterized in that The solenoid valve assembly (30) further includes a return elastic member (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).

5. The gas injector according to claim 3, characterized in that The solenoid valve assembly (30) further includes a main elastic member (72); One end of the main elastic member (72) abuts against the thrust rod (71), and the other end of the main elastic member (72) abuts against the bottom of the cavity of the armature (74).

6. The gas injector according to claim 1, characterized in that Also includes: Sealing seat (8); The sealing seat (8) is arranged on a side of the housing (4) close to the air outlet (13); the sealing seat (8) comprises a sealing seat circulation cavity (81); the sealing seat circulation cavity (81) is in communication with the air outlet (13); When the electromagnet assembly (3) is not energized, a surface of one side of the armature (74) close to the air outlet (13) at least covers the sealing seat flow cavity (81), and the air inlet (12) and the air outlet (13) are not connected to each other; When the electromagnet assembly (3) is energized, the air inlet (12) is connected to the sealing seat flow cavity (81) through the cavity of the electromagnet assembly (3) and the cavity of the armature (74).

7. The gas injector according to claim 6, characterized in that Also includes: Seals (79); The sealing member (79) is located between the sealing seat (8) and the armature (74), and the sealing member (79) is at least arranged around the sealing seat flow cavity (81); A surface of one side of the armature (74) close to the sealing seat (8) comprises a recessed structure (745), and at least a portion of the sealing element (79) is located in the recessed structure (745).

8. A vehicle, characterized in that: include: The gas injector according to any one of claims 1 to 7.

Images