Magnetic component for an injector, injector and engine

Abstract

The application discloses a magnetic component for an injector, an injector and an engine. The magnetic component is arranged in the injector as a valve core and / or a valve body, the valve core is movably arranged between a valve body and a valve seat of the injector, and a flow path of the injector is closed when the valve core is in abutting fit with the valve seat; the magnetic component is provided with a magnetic shielding current guide part which is configured to at least reduce residual magnetism of the magnetic component. The scheme can effectively weaken the influence of residual magnetism of the valve core and the valve body and the like in the injector, optimize the flow state of fuel fluid, and significantly improve the working performance of the injector.

Description

Technical Field

[0001] This application relates to the field of injector technology, and more particularly to magnetic components for injectors, injectors, and engines. Background Technology

[0002] The injector is the core actuator of the engine fuel supply system. Its function is to finely atomize liquid fuel or uniformly diffuse gaseous fuel, and inject it into the engine combustion chamber or intake passage in a precisely controlled manner. To achieve this injection process, the injector is generally equipped with components such as a valve body, valve core, valve seat, and seals. Their dynamic cooperation enables the injector to open and close. Injectors typically operate at high frequencies to meet the continuous working requirements of the engine; in some cases, the injector may need to withstand hundreds of millions of opening and closing cycles. Utility Model Content

[0003] In view of this, this application provides a magnetic component for an injector, an injector and an engine, which can solve or at least alleviate one or more of the problems existing in the prior art and other aspects, or can provide an alternative technical solution to the prior art.

[0004] First, according to one aspect of this application, a magnetic component for an injector is provided, the magnetic component being arranged in the flow path of the injector as a valve core and / or valve body, the valve core being movably arranged between the valve body and valve seat of the injector, the flow path being closed when the valve core abuts against the valve seat, the magnetic component being provided with a magnetically shielded flow guide portion, the magnetically shielded flow guide portion being configured to at least reduce the residual magnetism of the magnetic component.

[0005] In the magnetic component for an injector according to this application, optionally, when the magnetic component is used as a valve core, the magnetically shielding flow guide is disposed on at least a portion of the surface of the valve core facing the valve body, or when the magnetic component is used as a valve body, the magnetically shielding flow guide is disposed on at least a portion of the surface of the valve body facing the valve core.

[0006] In the magnetic component for an injector according to this application, optionally, the magnetic component has a flow channel communicating with the flow path, and the magnetically shielded flow guide is arranged adjacent to the flow channel and in contact with the fuel fluid flowing through the flow channel.

[0007] In the magnetic component for an injector according to this application, optionally, the magnetically shielded flow guide is configured as a groove arranged circumferentially around the flow channel.

[0008] In the magnetic component for an injector according to this application, optionally, in a longitudinal section passing through the central axis of the magnetic component, the projected length of the groove in the transverse direction is 20-80% of the wall thickness of the magnetic component, the transverse direction being a direction perpendicular to the central axis of the magnetic component; and / or, the cross-sectional profile of the groove is one of a triangle, an arc, or a rectangle.

[0009] In the magnetic component for an injector according to this application, optionally, the depth of the groove in the axial direction of the magnetic component ranges from 0.01 to 0.3 mm.

[0010] In the magnetic component for an injector according to this application, optionally, the magnetic shielding flow guide is formed by chamfering or rounding, and / or the magnetic component is made of stainless steel magnetic material.

[0011] Furthermore, according to another aspect of this application, an injector is also provided, comprising: A housing having an inlet and an outlet, and a flow path located between the inlet and the outlet; Valve seat, the valve seat being fixed within the injector housing; and A valve core and a valve body, at least one of which employs a magnetic component for an injector as described in any of the above, the valve body being fixed within the injector housing, and the valve core being movably disposed between the valve body and the valve seat.

[0012] Optionally, in the injector according to this application, the injector includes a spring and an electromagnetic assembly. The spring is arranged between the valve body and the valve core, and the electromagnetic assembly provides an electromagnetic force acting on the valve core when energized. When the electromagnetic assembly does not provide an electromagnetic force, the valve core abuts against the valve seat at least under the spring force of the spring, thereby closing the flow path. Under the action of the electromagnetic force provided by the electromagnetic assembly, the valve core is actuated towards the valve body and disengages from the valve seat, thereby opening the flow path.

[0013] In addition, according to another aspect of this application, an engine is further provided, the engine being provided with a magnetic component for an injector as described in any of the foregoing claims, or being provided with an injector as described in any of the foregoing claims.

[0014] The proposed solution not only effectively reduces the residual magnetism of the valve core and valve body inside the injector, but also optimizes the flow state of the fuel fluid, enhances the closing force acting on the valve core, and thus prompts the injector to close, thereby ensuring and improving the injector's performance. The injector of this application can withstand hundreds of millions of opening and closing cycles while maintaining a stable and reliable operating state. This solution has broad applicability and can be applied to many engine types, such as PFI (Port Fuel Injection) engines, natural gas engines, and hydrogen engines, providing a reliable guarantee for the long-term safe operation of the system. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of an injector according to this application.

[0016] Figure 2 yes Figure 1 A magnified schematic diagram of part A in the middle.

[0017] Figure 3 yes Figure 1 A three-dimensional structural diagram of the valve body in the shown injector embodiment.

[0018] Figure 4 yes Figure 3 The diagram shows a partial cross-sectional view of an example valve body, illustrating some of the structure of the magnetic shielding and flow guiding section, etc.

[0019] Figure 5 yes Figure 1 A three-dimensional structural diagram of the valve core in the shown injector embodiment.

[0020] Figure 6 yes Figure 5 The diagram shows a partial cross-sectional view of an example valve core, illustrating some of the structure of the magnetic shielding and flow guiding section, etc. Detailed Implementation

[0021] It should be noted that the following description, by way of example, illustrates the structural configuration, features, and advantages of the magnetic component for the injector, the injector, and the engine according to this application; however, all descriptions should not be construed as limiting the scope of this application. In this document, the technical terms "first" and "second" are used only for distinguishing purposes and are not intended to indicate their order or relative importance; the technical terms "upper," "lower," "inner," "outer," "lateral," "vertical," etc., and their derivatives, should be considered in relation to... Figure 1 This application adopts a directional approach, but it should be understood that, except where explicitly indicated as the opposite, this application may take various alternative approaches. Furthermore, for the sake of simplicity in the drawings, identical or similar parts and features may be indicated in only one or more places in the same drawing.

[0022] This application provides a magnetic component with an improved structure, which can be configured in an injector as a valve body or valve core. On the one hand, it can effectively reduce the influence of residual magnetism on the valve core's movement, and on the other hand, it can promote fuel fluid flow and enhance the force on the valve core, thereby improving the injector's performance in terms of working stability and response speed. The following will describe the solution of this application in detail with reference to the accompanying drawings.

[0023] First of all, Figure 1 The image vertically illustrates, by way of demonstration, the general structure and composition of an embodiment of an injector according to this application. For example... Figure 1 As shown, the injector 100 is provided with a housing 10, which has an inlet 101 and an outlet 102. Fuel (such as atomized fuel or gaseous fuel) enters from the inlet 101 and flows through a flow path 103 formed inside the housing 10, and is then ejected outward from the outlet 102. The specific structure of the housing 10 can be designed in various ways according to actual application requirements. For example, it can adopt an integral structure or a combined structure. Alternatively, an inner shell 10' can be further configured on the housing 10. This inner shell can be made of any suitable material such as stainless steel, copper, or aluminum alloy to adapt to different working media, pressure environments, and other requirements.

[0024] Inside the housing 10 of the injector 100, a valve core 11, a valve body 12, and a valve seat 13 are arranged. These components are all positioned within a flow path 103, which serves as the fuel flow path, thereby enabling effective control of fuel flow. The valve body 12 and valve seat 13 are fixed relative to the housing 10. The valve core 11 is movable within a defined space between the valve body 12 and the valve seat 13. It has a first side 111 and a second side 112 facing the valve seat 13 and the valve body 12, respectively, forming a channel 113 between these sides to allow fuel flow. This channel 113 constitutes part of the flow path 103. Either the valve body 12 or the valve core 11 can be designed and manufactured using the magnetic component scheme of this application. They can optionally be made of stainless steel magnetic materials, ferrite materials, etc. Such material selection not only enables magnetic conduction but also provides rust protection and durability. The valve seat 13 can be made of any suitable material that meets the application requirements, such as stainless steel, copper, or steel.

[0025] exist Figure 1In the illustrated embodiment, a spring 14 and an electromagnetic assembly 15 are optionally configured to drive and control the movement of the valve core 11. The spring 14 is positioned between the valve body 12 and the valve core 11, and its continuous spring force pushes the valve core 11 towards the valve seat 13, creating a contact fit. This closes the flow path 103 of the injector 100, preventing fuel injection and achieving a closed flow path. It should be noted that in many cases, some atomized or gaseous fuel may remain in the flow path 103, exerting pressure on the valve core 11. This pressure, combined with the spring force of the spring 14, creates a resultant force, further strengthening the sealing fit between the valve core 11 and the valve seat 13 and enhancing the reliability of the closed state.

[0026] The electromagnetic assembly 15 serves as a power source for moving the valve core 11. It may include an electromagnet 14 (e.g., composed of a winding coil), a cover 19, and a magnetic cup structure composed of magnetically conductive components 17 and 18. The electromagnet 14 can be installed inside the magnetic cup, and the cover 19 can be assembled and cooperated with the magnetic cup and the housing 10 to prevent or reduce electromagnetic energy leakage, ensure operational efficiency and safety, etc.

[0027] In its normal, unpowered state, the electromagnetic component 15 does not generate electromagnetic force. Once powered, it generates sufficient electromagnetic force to drive the valve core 11. Under this force, the valve core 11 overcomes the spring force provided by the spring 14 and moves towards the valve body 12, thus disengaging from its contact with the valve seat 13. This opens the flow path 103 of the injector 100, allowing fuel to be continuously injected through the outlet 102. When injection needs to be terminated, simply disconnecting the power supply to the electromagnetic component 15 dissipates the electromagnetic force. At this point, the spring force of the spring 14, along with any available fuel fluid pressure, creates a force opposite to the electromagnetic force, pushing the valve core 11 towards the valve seat 13, restoring it to its contact position, and closing the flow path 103 again. In one or more embodiments, the injector 100 may employ pulse width modulation (PWM) to adjust the drive current in order to control the electromagnetic force as desired, thereby precisely controlling the displacement stroke of the valve core 11 and achieving precise control of the opening and closing of the injector and the fuel flow.

[0028] Reference Figures 2 to 6 In the given injector embodiment, both the valve body 12 and the valve core 11 employ the magnetic component scheme of this application, and each is provided with a magnetically shielded flow guiding section 20. Specifically, as... Figure 2 , Figure 3 and Figure 4As shown, for the valve body 12, the magnetically shielded flow guide 20 can be arranged on at least a portion of the surface of its first side 12a (i.e. the side facing the valve core 11), for example, arranged adjacent to the flow channel 12c of the valve body 12, for example, configured as a groove structure circumferentially arranged around the flow channel 12c, the flow channel 12c being disposed between the first side 12a and the second side 12b (i.e. the side facing the inlet 101) of the valve body 12 and communicating with the flow path 103.

[0029] Similarly, see reference Figure 2 , Figure 5 and Figure 6 As shown, for valve core 11, magnetically shielded flow guide 20 can be arranged on at least a portion of its first side 11a (i.e. the side facing valve body 12), for example, arranged adjacent to the flow channel 11c of valve core 11, for example, configured as a groove structure circumferentially arranged around the flow channel 11c, and the flow channel 121 is disposed between the first side 11a and the second side 11b (i.e. the side facing valve seat 13) of valve core 11 and communicates with the flow path 103.

[0030] By providing a magnetically shielded flow guide 20 on the valve body 12 and valve core 11, it can directly contact the fuel fluid flowing through the flow channel, achieving the dual functions of magnetic circuit regulation and fluid guidance. The design of this application addresses the fact that existing injector products generally do not consider or solve the potential adverse effects of residual magnetism on the injector's opening and closing operation caused by the magnetic material components. This is because if the residual magnetism is significant, for example, greater than the combined force of the spring force and air pressure discussed above, it will affect the normal movement of the valve core, easily leading to the injector failing to close the flow path as expected, resulting in unstable performance, poor sealing, or delayed response. By using the technical solution of this application, by providing a magnetically shielded flow guide 20 on the valve body and / or valve core, the residual magnetism can be controlled at the desired level, providing a reliable guarantee for achieving fast and reliable injector opening and closing operation control.

[0031] It should be understood that this application allows for flexible configuration of the magnetic shielding and flow guiding section in terms of manufacturing process, structural design, layout, and quantity as needed.

[0032] For example, for example, refer to Figure 4 and Figure 6When the magnetically shielded flow guide section 20 adopts a groove structure, it can be optionally configured such that, in the longitudinal section passing through the central axis (L1 or L2) of the magnetic component 20 (i.e., the valve body or valve core), the projected length W2 of the groove in the transverse direction of the valve body 12 (i.e., the direction perpendicular to the valve body's central axis L1) is 20% to 80% of the wall thickness W1 of the valve body 12, and the projected length W4 of the groove in the transverse direction of the valve core 11 (i.e., the direction perpendicular to the valve core's central axis L2) is 20% to 80% of the wall thickness W3 of the valve core 11. This configuration design effectively reduces residual magnetic force without affecting the opening force generated by the magnetic force, thus better balancing magnetic force regulation and mechanical performance. Furthermore, the cross-sectional profile of the groove can be constructed into, for example, a triangle, an arc, a rectangle, or any other suitable shape to adapt to different magnetic field distributions and hydrodynamic requirements. For another example, the depth of the groove in the axial direction of the valve body or valve core can be set in the range of 0.01 mm to 0.3 mm. This can effectively reduce the residual magnetic force on the one hand, and ensure that sufficient magnetic force is generated to provide the opening force on the other hand.

[0033] Furthermore, it should be noted that although the magnetic shielding flow guide 20 is shown as a single groove structure in the accompanying drawings, in practical applications, multiple parallel or staggered grooves can be arranged in combination, as long as they can achieve the magnetic shielding flow guide effect described above. In addition, the actual arrangement position of the magnetic shielding flow guide 20 is not limited to the opposite side of the valve body or valve core shown exemplary in the drawings. In other embodiments, the magnetic shielding flow guide can be located at any other suitable position on the valve body or valve core, depending on the needs of different applications. In terms of manufacturing process, the magnetic shielding flow guide 20 can be manufactured using any one or more feasible methods, such as machining or casting, as needed. For example, using chamfering or rounding processes can be very convenient, efficient, and low-cost.

[0034] Due to the aforementioned technical advantages, this magnetic component can be applied to various types of injectors, such as HFI (High Flowrate Gas Injector) injectors. Compared to injectors with ordinary point-type nozzles, HFI injectors and similar devices feature large-diameter nozzles, high gas pressure, high flow rate, and stringent sealing requirements. This magnetic component is perfectly suited to meet the application requirements of such injectors.

[0035] This application further provides an engine on which a magnetic component designed according to this application or an injector including such a component can be configured. It should be noted that the engine types of this application are numerous, including but not limited to PFI engines, methanol fuel engines, and gaseous fuel (such as natural gas, hydrogen, ammonia, etc.) engines. The engine of this application has a wide range of applications, for example, it can be used in low-pressure conditions such as 4-30 barA. Depending on actual needs, the engine of this application can be widely applied to various vehicles, ships, aircraft, and other mobile or stationary power equipment, thereby fully leveraging the advantages discussed above that are significantly superior to the prior art, and improving the safety and reliability of the system.

[0036] The above examples illustrate the magnetic components, injectors, and engines for injectors according to this application. These examples are for explaining the principles and implementation methods of this application only and are not intended to limit the application. Various modifications and improvements can be made by those skilled in the art without departing from the scope of this application. Therefore, all equivalent technical solutions should fall within the scope of this application and be defined by the claims of this application.

Claims

1. A magnetic component for an injector (100), the magnetic component being disposed in the injector (100) as a valve core (11) and / or a valve body (12), the valve core (11) being movably disposed between the valve body (12) and a valve seat (13) of the injector (100), wherein when the valve core (11) abuts against the valve seat (13), it closes the flow path (103) of the injector (100), characterized in that, The magnetic component is provided with a magnetic shielding and flow guiding section (20), which is configured to at least reduce the residual magnetism of the magnetic component.

2. The magnetic component for the injector (100) according to claim 1, wherein, When the magnetic component is used as a valve core (11), the magnetically shielded flow guide (20) is disposed on at least a portion of the surface of the valve core (11) facing the valve body (12), or when the magnetic component is used as a valve body (12), the magnetically shielded flow guide (20) is disposed on at least a portion of the surface of the valve body (12) facing the valve core (11).

3. The magnetic component for the injector (100) according to claim 1, wherein, The magnetic component has a flow channel communicating with the flow path (103), and the magnetically shielded flow guide (20) is arranged adjacent to the flow channel and in contact with the fuel fluid flowing through the flow channel.

4. The magnetic component for the injector (100) according to claim 3, wherein, The magnetically shielded flow guide (20) is configured as a groove arranged circumferentially around the flow channel.

5. The magnetic component for the injector (100) according to claim 4, wherein, In a longitudinal section passing through the central axis of the magnetic component, the projected length of the groove in the transverse direction is 20-80% of the wall thickness of the magnetic component, and the transverse direction is a direction perpendicular to the central axis of the magnetic component; and / or, the cross-sectional profile of the groove is one of a triangle, an arc, or a rectangle.

6. The magnetic component for the injector (100) according to claim 5, wherein, The depth of the groove in the axial direction of the magnetic component ranges from 0.01 to 0.3 mm.

7. The magnetic component for the injector (100) according to any one of claims 1-6, wherein, The magnetic shielding flow guide (20) is formed by chamfering or rounding, and / or the magnetic component is made of stainless steel magnetic material.

8. A jet injector (100), characterized in that, include: The housing (10) has an inlet (101) and an outlet (102), and a flow path (103) located between the inlet (101) and the outlet (102). Valve seat (13), said valve seat (13) being fixed within the injector (100) housing (10); and The valve core (11) and valve body (12), at least one of which employs a magnetic component for an injector (100) as described in any one of claims 1-7, the valve body (12) being fixed within the injector (100) housing (10), and the valve core (11) being movably arranged between the valve body (12) and the valve seat (13).

9. The injector (100) according to claim 8, wherein, The injector (100) includes a spring (14) and an electromagnetic assembly (15). The spring (14) is arranged between the valve body (12) and the valve core (11). When the electromagnetic assembly (15) is energized, it provides an electromagnetic force to the valve core (11). When the electromagnetic assembly (15) does not provide an electromagnetic force, the valve core (11) is engaged with the valve seat (13) at least under the spring force of the spring (14), thereby closing the flow path (103). Under the electromagnetic force provided by the electromagnetic assembly (15), the valve core (11) is actuated towards the valve body (12) and disengages from the valve seat (13), thereby opening the flow path (103).

10. An engine, characterized in that, The engine is provided with a magnetic component for the injector (100) as described in any one of claims 1-7, or is provided with an injector (100) as described in claim 8 or 9.

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