Engine valve and engine

Abstract

The present invention relates to the field of engine power system control technology, and in particular to a valve of an engine and an engine, wherein the valve comprises: a valve sleeve, on which a medium inlet and a medium outlet are provided; a spring seat, which is blocked at the first end of the valve sleeve; a valve core, which is movably arranged in the valve sleeve, the valve core is in sealing contact with the valve sleeve, a spring cavity is formed between the first end of the valve core and the spring seat, the medium outlet is arranged on the side wall of the spring cavity, the valve core is provided with a flow channel, the first end of the flow channel is connected with the spring cavity, the second end of the flow channel is arranged on the side wall of the valve core, and the second end of the valve core is provided with a pressure cavity; a spring, one end of which is arranged on the spring seat, and the other end is against the valve core; an inlet channel, which comprises a first branch channel connected with the pressure cavity and a second branch channel connected with the medium inlet. The valve can meet the requirement that the medium is not allowed to flow out of the valve at low pressure and high pressure, and the medium is required to flow out of the valve at the intermediate pressure.

Description

Technical Field

[0001] The invention relates to the technical field of engine power system control, and in particular to an engine valve and an engine. Background Art

[0002] The engine distributor is located between the pump regulator and the nozzle, and a one-way valve is set in front of the nozzle. The purpose of the one-way valve is to prevent the medium inside the distributor from flowing to the nozzle when the engine is stopped, and to prevent other impurities from entering the distributor and pump regulator due to the back pressure of the combustion chamber. After the engine is stopped, the pressure inside the distributor will increase due to changes in ambient temperature and other factors. At this time, the medium is not allowed to flow to the nozzle through the one-way valve. Therefore, valves and other components need to be set inside the distributor to discharge the medium. However, when the engine is working normally, the medium is not allowed to flow from the valve to the outside. That is, one or more valves are needed to prevent the medium from flowing out of the valve at low pressure and high pressure, and require the medium to flow out of the valve at the intermediate pressure. The current solution is to design two valves to cooperate to achieve this function. In actual use, the two valves need to be used in conjunction, affecting each other, and the adjustment process is relatively cumbersome, and the two valves need to be adjusted repeatedly. In addition, the two valves have many parts and occupy a large space, resulting in large product size and weight, which does not meet the requirements of lightweight. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that two valves are needed to control the outflow of the medium, the valve parts are large in number and the space occupied is large, thereby providing a valve and engine for the engine that only requires one valve to control the outflow of the medium, which can reduce the number of parts and reduce the space occupied.

[0004] In order to solve the above technical problems, the present invention provides a valve of an engine, comprising:

[0005] A valve sleeve, wherein the valve sleeve is provided with a medium inlet and a medium outlet;

[0006] A spring seat, sealed at the first end of the valve sleeve;

[0007] A valve core is movably arranged in the valve sleeve, the valve core is in sealing contact with the valve sleeve, a spring cavity is formed between the first end of the valve core and the spring seat, the medium outflow port is arranged on the side wall of the spring cavity, the valve core is provided with a flow channel, the first end of the flow channel is communicated with the spring cavity, the second end of the flow channel is arranged on the side wall of the valve core, and the second end of the valve core is provided with a pressure cavity;

[0008] A spring, one end of which is arranged on the spring seat and the other end of which is against the valve core;

[0009] An inlet channel, comprising a first branch channel communicating with the pressure chamber and a second branch channel communicating with the medium flow inlet;

[0010] When the pressure of the inlet channel is less than the first preset pressure, the second end of the circulation channel is located on the side of the medium flow inlet away from the spring cavity; when the pressure of the inlet channel is greater than or equal to the second preset pressure, the second end of the circulation channel is located on the side of the medium flow inlet close to the spring cavity; when the pressure of the inlet channel is greater than or equal to the first preset pressure and less than the second preset pressure, the second end of the circulation channel is opposite to the medium flow inlet.

[0011] Optionally, along a direction parallel to the axis of the valve core, a width of the second end of the circulation channel is greater than a width of the medium inlet.

[0012] Optionally, the circulation channel includes an axial section located in the middle of the valve core and a radial section perpendicular to the axial section, the radial section includes a first section connected to the axial section and a second section connected to the first section, the end of the second section away from the first section constitutes the second end of the circulation channel, and along a direction parallel to the axis of the valve core, the width of the second section is greater than the width of the first section.

[0013] Optionally, the valve core and the valve sleeve are clearance-matched, and from the second end of the valve core to the first end of the valve core, a first sealing assembly, a second sealing assembly, and a third sealing assembly are sequentially provided between the valve core and the valve sleeve, and the first sealing assembly and the second sealing assembly are distributed on both sides of the second end of the circulation channel, and when the pressure of the inlet channel is less than a first preset pressure, the second sealing assembly and the third sealing assembly are distributed on both sides of the medium flow inlet.

[0014] Optionally, the first sealing assembly includes a first sealing ring and a first sealing ring surrounding the first sealing ring;

[0015] And / or, the second sealing assembly includes a second sealing ring and a second sealing ring surrounding the second sealing ring;

[0016] And / or, the third sealing assembly includes a third sealing ring and a third sealing ring surrounding the third sealing ring.

[0017] Optionally, from the second end of the valve core to the first end of the valve core, the valve core is provided with a first annular groove, a second annular groove, and a third annular groove in sequence, the first sealing component is arranged in the first annular groove, the second sealing component is arranged in the second annular groove, and the third sealing component is arranged in the third annular groove.

[0018] Optionally, the valve sleeve and the spring seat are sealed and connected via a fourth sealing ring.

[0019] Optionally, a fifth sealing ring and a sixth sealing ring are disposed outside the valve sleeve, and the fifth sealing ring and the sixth sealing ring are respectively located on both sides of the medium inlet.

[0020] Optionally, a throttle nozzle is provided on the second branch channel.

[0021] The present invention also provides an engine, comprising the valve of the engine.

[0022] The technical solution of the present invention has the following advantages:

[0023] The valve of the engine provided by the present invention, when the pressure is low, that is, when the pressure of the inlet channel does not reach the first preset pressure P1, the elastic force of the spring acts on the valve core to offset the pressure of the pressure chamber, and the valve core does not move or moves a small distance, so that the second end of the circulation channel of the valve core is located on the side of the medium flow inlet away from the spring chamber. At this time, the medium flow inlet is blocked by the side wall of the valve core, and the medium cannot flow into the spring chamber through the medium flow inlet and the circulation channel and flow out through the medium flow outlet; at the intermediate pressure, that is, when the pressure of the inlet channel is further increased to the first preset pressure P1, the valve core moves toward the spring chamber, so that the second end of the circulation channel is opposite to the medium flow inlet, and the medium flows through the second end of the circulation channel. The second branch channel, the medium inlet, and the circulation channel flow into the spring cavity and flow out through the medium outlet. When the pressure of the inlet channel does not reach the second preset pressure P2, the medium in the medium inlet can flow into the circulation channel; at high pressure, that is, when the pressure of the inlet channel further increases to the second preset pressure P2, the valve core continues to move toward the spring cavity, and the medium inlet is blocked by the side wall of the valve core again, and the medium cannot flow into the spring cavity through the medium inlet and the circulation channel and flow out through the medium outlet. The valve is closed and the medium stops flowing out; when the pressure continues to increase, it is finally stopped by the spring seat; when the pressure at the inlet channel is relieved, the valve core rebounds quickly under the action of the spring and remains in the initial closed state. Therefore, the valve can meet the requirements of not allowing the medium to flow out of the valve at low and high pressures, and requiring the medium to flow out of the valve at the intermediate pressure. It has a small number of parts, occupies a small space, and has a small weight, which meets the requirements of lightweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A cross-sectional view of the valve provided in Embodiment 1 of the present invention at low pressure;

[0026] Figure 2 A cross-sectional view of the valve provided in Embodiment 1 of the present invention at the time of the intermediate section pressure;

[0027] Figure 3 This is a cross-sectional view of the valve provided in Example 1 of the present invention at high pressure.

[0028] Description of reference numerals:

[0029] 1. Valve sleeve; 101. Medium inlet; 102. Medium outlet; 2. Spring seat; 3. Valve core; 301. Pressure chamber; 302. Axial section; 303. First section; 304. Second section; 4. Spring chamber; 5. Inlet channel; 501. First branch channel; 502. Second branch channel; 6. Spring; 7. First sealing ring; 8. First sealing ring; 9. Second sealing ring; 10. Second sealing ring; 11. Third sealing ring; 12. Third sealing ring; 13. Fourth sealing ring; 14. Fifth sealing ring; 15. Sixth sealing ring; 16. Throttle nozzle. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1

[0035] The engine distributor is located between the pump regulator and the nozzle, and a one-way valve is set in front of the nozzle. The purpose of the one-way valve is to prevent the medium inside the distributor from flowing to the nozzle when the engine is stopped, and to prevent other impurities from entering the distributor and pump regulator due to the back pressure of the combustion chamber. After the engine is stopped, the pressure inside the distributor will increase due to changes in ambient temperature and other factors. At this time, the medium is not allowed to flow to the nozzle through the one-way valve. Therefore, valves and other components need to be set inside the distributor to discharge the medium. However, when the engine is working normally, the medium is not allowed to flow from the valve to the outside. That is, one or more valves are needed to prevent the medium from flowing out of the valve at low pressure and high pressure, and require the medium to flow out of the valve at the intermediate pressure. The current solution is to design two valves to cooperate to achieve this function. In actual use, the two valves need to be used in conjunction, affecting each other, and the adjustment process is relatively cumbersome, and the two valves need to be adjusted repeatedly. In addition, the two valves have many parts and occupy a large space, resulting in large product size and weight, which does not meet the requirements of lightweight.

[0036] To this end, the present embodiment provides a valve for an engine. Only one valve is used to meet the requirement that the medium is not allowed to flow out of the valve at low pressure and high pressure, while the medium is required to flow out of the valve at intermediate pressure. It has a small number of parts, occupies a small space, and has a small weight, meeting the lightweight requirements.

[0037] In one embodiment, if Figures 1 to 3As shown, the valve of the engine includes a valve sleeve 1, a spring seat 2, a valve core 3, a spring 6, and an inlet channel 5. The valve sleeve 1 is provided with a medium inlet 101 and a medium outlet 102; the spring seat 2 is blocked at the first end of the valve sleeve 1; the valve core 3 is movably arranged in the valve sleeve 1, the valve core 3 is in sealing contact with the valve sleeve 1, a spring cavity 4 is formed between the first end of the valve core 3 and the spring seat 2, the medium outlet 102 is arranged on the side wall of the spring cavity 4, the valve core 3 is provided with a flow channel, the first end of the flow channel is connected to the spring cavity 4, the second end of the flow channel is arranged on the side wall of the valve core 3, and the second end of the valve core 3 is provided with a pressure cavity 301; one end of the spring 6 is arranged on the spring seat 2, and the other end is against the valve core 3; the inlet channel 5 includes a first branch channel 501 connected to the pressure cavity 301 and a second branch channel 502 connected to the medium inlet 101. When the pressure of the inlet channel 5 is less than the first preset pressure, the second end of the circulation channel is located on the side of the medium flow inlet 101 away from the spring chamber 4; when the pressure of the inlet channel 5 is greater than or equal to the second preset pressure, the second end of the circulation channel is located on the side of the medium flow inlet 101 close to the spring chamber 4; when the pressure of the inlet channel 5 is greater than or equal to the first preset pressure and less than the second preset pressure, the second end of the circulation channel is opposite to the medium flow inlet 101.

[0038] In this embodiment, at low pressure, that is, when the pressure of the inlet channel 5 does not reach the first preset pressure P1, the elastic force of the spring 6 acts on the valve core 3 to offset the pressure of the pressure chamber 301, and the valve core 3 does not move or moves a small distance, so that the second end of the circulation channel of the valve core 3 is located on the side of the medium inlet 101 away from the spring chamber 4. At this time, the medium inlet 101 is blocked by the side wall of the valve core 3, and the medium cannot flow into the spring chamber 4 through the medium inlet 101 and the circulation channel and flow out through the medium outlet 102; at the intermediate pressure, that is, when the pressure of the inlet channel 5 is further increased to the first preset pressure P1, the valve core 3 moves toward the spring chamber 4, so that the second end of the circulation channel is opposite to the medium inlet 101, and the medium flows out through the second branch channel 50 2. The medium flows into the spring chamber 4 through the inlet 101 and the circulation channel and flows out through the medium outlet 102. When the pressure of the inlet channel 5 does not reach the second preset pressure P2, the medium in the medium inlet 101 can flow into the circulation channel. When the pressure is high, that is, when the pressure of the inlet channel 5 further increases to the second preset pressure P2, the valve core 3 continues to move toward the spring chamber 4, and the medium inlet 101 is blocked by the side wall of the valve core 3 again. The medium cannot flow into the spring chamber 4 through the medium inlet 101 and the circulation channel and flow out through the medium outlet 102. The valve is closed and the medium stops flowing out. When the pressure continues to increase, it is finally stopped by the spring seat 2. When the pressure at the inlet channel 5 is relieved, the valve core 3 rebounds quickly under the action of the spring 6 and remains in the initial closed state. Therefore, the valve can meet the requirements of not allowing the medium to flow out of the valve at low and high pressures, and requiring the medium to flow out of the valve at the intermediate pressure. It has a small number of parts, small space occupation, and small weight, which meets the requirements of lightweight.

[0039] On the basis of the above-mentioned embodiments, in a preferred embodiment, the width of the second end of the circulation channel is greater than the width of the medium inlet 101 in the direction parallel to the axis of the valve core 3. In this embodiment, since the width of the second end of the circulation channel is greater than the width of the medium inlet 101, it can meet the requirement that the circulation channel can be connected with the medium inlet 101 during the movement of the valve core 3 for a certain distance, that is, it can meet the requirement that the medium flows into the spring chamber 4 through the medium inlet 101 and the circulation channel and flows out through the medium outlet 102 within a certain pressure range, and the valve is in an open state, and since the width of the medium inlet 101 is small, the valve core 3 needs to move a long distance in the process from low pressure to the middle pressure, so that the valve can meet a wider pressure range, and there is no need to increase the size of the valve core 3, so as to meet the requirements of lightweight. It should be noted that the width of the second end of the circulation channel refers to the size of the second end of the circulation channel in the direction parallel to the axis of the valve core 3, and the width of the medium inlet 101 refers to the size of the medium inlet 101 in the direction parallel to the axis of the valve core 3. In an alternative embodiment, the width of the second end of the flow channel may be smaller than or equal to the width of the medium inlet 101 .

[0040] Based on the above implementation, in a preferred implementation, further refer to Figure 1 , the circulation channel includes an axial section 302 located in the middle of the valve core 3 and a radial section perpendicular to the axial section 302, the radial section includes a first section 303 connected to the axial section 302 and a second section 304 connected to the first section 303, the end of the second section 304 away from the first section 303 constitutes the second end of the circulation channel, and the width of the second section 304 is greater than the width of the first section 303 along the direction parallel to the axis of the valve core 3. In this embodiment, since the width of the second section 304 is greater than the width of the first section 303, it can be ensured that the medium entering the radial section has a certain pressure, thereby ensuring that the medium can flow out from the medium outlet 102. Of course, in other alternative embodiments, the width of the second section 304 can be equal to the width of the first section 303.

[0041] On the basis of the above-mentioned embodiment, in a preferred embodiment, the valve core 3 and the valve sleeve 1 are clearance-matched, and from the second end of the valve core 3 to the first end of the valve core 3, a first sealing component, a second sealing component, and a third sealing component are sequentially provided between the valve core 3 and the valve sleeve 1, and the first sealing component and the second sealing component are distributed on both sides of the second end of the circulation channel, and when the pressure of the inlet channel 5 is less than the first preset pressure, the second sealing component and the third sealing component are distributed on both sides of the medium flow inlet 101. In this embodiment, at low pressure, that is, when the pressure of the inlet channel 5 does not reach the first preset pressure P1, the elastic force of the spring 6 acts on the valve core 3 to offset the pressure of the pressure chamber 301, and the valve core 3 does not move or moves a small distance, so that the second end of the flow channel of the valve core 3 is located on the side of the medium inlet 101 away from the spring chamber 4. At this time, both sides of the medium inlet 101 are blocked by the second sealing component and the third sealing component, and the medium cannot flow into the spring chamber 4 through the medium inlet 101 and the flow channel and flow out through the medium outlet 102; at the intermediate pressure, that is, when the pressure of the inlet channel 5 further increases to the first preset pressure P1, the valve core 3 moves toward the spring chamber 4. The valve core 3 moves to make the second end of the circulation channel opposite to the medium inlet 101. At this time, the medium flows into the spring chamber 4 through the second branch channel 502, the medium inlet 101, and the circulation channel, and flows out through the medium outlet 102. When the pressure of the inlet channel 5 does not reach the second preset pressure P2, the medium in the medium inlet 101 can flow into the circulation channel; at high pressure, that is, when the pressure of the inlet channel 5 further increases to the second preset pressure P2, the valve core 3 continues to move toward the spring chamber 4, and the medium inlet 101 is blocked by the first sealing component. The medium cannot flow into the spring chamber 4 through the medium inlet 101 and the circulation channel and flow out through the medium outlet 102. The valve is closed and the medium stops flowing out. In other alternative embodiments, a sealing material can be provided on the valve core 3 as a whole except for the second end of the circulation channel. Of course, this will cause the valve core 3 to encounter greater resistance when moving.

[0042] On the basis of the above embodiments, in a preferred embodiment, the first sealing assembly includes a first sealing ring 7 and a first sealing ring 8 surrounding the first sealing ring 7; and / or, the second sealing assembly includes a second sealing ring 9 and a second sealing ring 10 surrounding the second sealing ring 9; and / or, the third sealing assembly includes a third sealing ring 11 and a third sealing ring 12 surrounding the third sealing ring 11. Preferably, the first sealing assembly includes a first sealing ring 7 and a first sealing ring 8 surrounding the first sealing ring 7, the second sealing assembly includes a second sealing ring 9 and a second sealing ring 10 surrounding the second sealing ring 9, and the third sealing assembly includes a third sealing ring 11 and a third sealing ring 12 surrounding the third sealing ring 11, which can ensure the sealing effect and ensure that the medium will not leak. In other alternative embodiments, the first sealing assembly can be only a sealing ring or a sealing ring, the second sealing assembly can be only a sealing ring or a sealing ring, and the third sealing assembly can be only a sealing ring or a sealing ring.

[0043] The first sealing ring 7, the second sealing ring 9 and the third sealing ring 11 are all made of rubber materials, and the first sealing ring 8, the second sealing ring 10 and the third sealing ring 12 are made of polytetrafluoroethylene materials.

[0044] On the basis of the above-mentioned embodiment, in a preferred embodiment, from the second end of the valve core 3 to the first end of the valve core 3, the valve core 3 is provided with a first annular groove, a second annular groove, and a third annular groove in sequence, the first sealing component is provided in the first annular groove, the second sealing component is provided in the second annular groove, and the third sealing component is provided in the third annular groove. In this embodiment, the provision of the first annular groove, the second annular groove, and the third annular groove facilitates the installation of the first sealing component, the second sealing component, and the third sealing component. Of course, in other replaceable embodiments, the first annular groove, the second annular groove, and the third annular groove may not be provided, and the first sealing ring 7, the second sealing ring 9, and the third sealing ring 11 may be directly sleeved on the outside of the valve core 3.

[0045] Based on the above embodiment, in a preferred embodiment, the valve sleeve 1 and the spring seat 2 are sealed and connected via a fourth sealing ring 13. In this embodiment, the fourth sealing ring 13 can prevent the medium from leaking through the gap between the valve sleeve 1 and the spring seat 2.

[0046] On the basis of the above embodiment, in a preferred embodiment, a fifth sealing ring 14 and a sixth sealing ring 15 are provided outside the valve sleeve 1, and the fifth sealing ring 14 and the sixth sealing ring 15 are respectively located on both sides of the medium inlet 101. In this embodiment, the provision of the fifth sealing ring 14 and the sixth sealing ring 15 enables the valve to be sealed and connected with other structural parts.

[0047] Based on the above embodiment, in a preferred embodiment, a throttle 16 is provided on the second branch channel 502. In this embodiment, the throttle 16 can ensure that the pressure of the spring chamber 4 is lower than the pressure of the inlet channel 5 when the intermediate section pressure is in the open state.

[0048] Example 2

[0049] This embodiment provides an engine, including the valve of the engine provided in the above embodiment.

[0050] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A valve of an engine, characterized in that: include: A valve sleeve (1), wherein the valve sleeve (1) is provided with a medium inlet (101) and a medium outlet (102); A spring seat (2) is sealed at the first end of the valve sleeve (1); A valve core (3) is movably arranged in the valve sleeve (1), the valve core (3) is in sealing contact with the valve sleeve (1), a spring chamber (4) is formed between the first end of the valve core (3) and the spring seat (2), the medium outflow port (102) is arranged on the side wall of the spring chamber (4), the valve core (3) is provided with a circulation channel, the first end of the circulation channel is in communication with the spring chamber (4), the second end of the circulation channel is arranged on the side wall of the valve core (3), and the second end of the valve core (3) is provided with a pressure chamber (301); A spring (6), one end of which is disposed on the spring seat (2) and the other end of which abuts against the valve core (3); An inlet channel (5) comprising a first branch channel (501) communicating with the pressure chamber (301) and a second branch channel (502) communicating with the medium flow inlet (101); When the pressure of the inlet channel (5) is less than a first preset pressure, the second end of the circulation channel is located on a side of the medium inlet (101) away from the spring chamber (4); when the pressure of the inlet channel (5) is greater than or equal to a second preset pressure, the second end of the circulation channel is located on a side of the medium inlet (101) close to the spring chamber (4); when the pressure of the inlet channel (5) is greater than or equal to the first preset pressure and less than the second preset pressure, the second end of the circulation channel is opposite to the medium inlet (101); The valve core (3) and the valve sleeve (1) are loosely matched. From the second end of the valve core (3) to the first end of the valve core (3), a first sealing component, a second sealing component, and a third sealing component are sequentially arranged between the valve core (3) and the valve sleeve (1). The first sealing component and the second sealing component are distributed on both sides of the second end of the circulation channel. When the pressure of the inlet channel (5) is less than a first preset pressure, the second sealing component and the third sealing component are distributed on both sides of the medium inlet (101).

2. The engine valve according to claim 1, characterized in that: Along a direction parallel to the axis of the valve core (3), the width of the second end of the circulation channel is greater than the width of the medium inlet (101).

3. The engine valve according to claim 2, characterized in that: The circulation channel includes an axial section (302) located in the middle of the valve core (3) and a radial section perpendicular to the axial section (302), the radial section includes a first section (303) connected to the axial section (302) and a second section (304) connected to the first section (303), the end of the second section (304) away from the first section (303) constitutes the second end of the circulation channel, and along a direction parallel to the axis of the valve core (3), the width of the second section (304) is greater than the width of the first section (303).

4. The engine valve according to claim 1, characterized in that: The first sealing assembly comprises a first sealing ring (7) and a first sealing ring (8) surrounding the first sealing ring (7); And / or, the second sealing assembly comprises a second sealing ring (9) and a second sealing ring (10) surrounding the second sealing ring (9); And / or, the third sealing assembly comprises a third sealing ring (11) and a third sealing ring (12) surrounding the third sealing ring (11).

5. The valve of the engine according to claim 1, characterized in that: From the second end of the valve core (3) to the first end of the valve core (3), the valve core (3) is provided with a first annular groove, a second annular groove, and a third annular groove in sequence, the first sealing component is arranged in the first annular groove, the second sealing component is arranged in the second annular groove, and the third sealing component is arranged in the third annular groove.

6. The valve of the engine according to claim 1, characterized in that: The valve sleeve (1) and the spring seat (2) are sealed and connected via a fourth sealing ring (13).

7. The valve of the engine according to claim 1, characterized in that: The valve sleeve (1) is provided with a fifth sealing ring (14) and a sixth sealing ring (15) outside, and the fifth sealing ring (14) and the sixth sealing ring (15) are respectively located on both sides of the medium inlet (101).

8. The valve of the engine according to any one of claims 1 to 7, characterized in that: The second branch channel (502) is provided with a throttle nozzle (16).

9. An engine, characterized in that: A valve for an engine comprising the valve of any one of claims 1 to 8.

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