Nozzle and solenoid valve

Abstract

The present application provides a nozzle configured for a solenoid valve, comprising: a body portion defining a chamber; the body part is provided with an inlet used for allowing fluid to enter the cavity and an outlet used for allowing the fluid to flow out of the cavity, and the outlet is connected with the spraying hole so that the fluid can enter the nozzle from the inlet and flow out of the spraying hole; a protruding part which is configured to be matched with a valve element of the electromagnetic valve to form sealing is formed on the body part, the outlet is formed in the protruding part, so that when the protruding part and the valve element form sealing, the outlet is not communicated with fluid of the inlet, and a groove is formed in the protruding part. The utility model further provides an electromagnetic valve comprising the nozzle. And the actual reaction time of the electromagnetic valve is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electromagnetic control, especially to a nozzle and an electromagnetic valve of an electronic brake system for a vehicle comprising the nozzle. BACKGROUND

[0002] In commercial vehicles, an electronic brake system (EBS) is a very important component, which precisely controls the braking force of the vehicle through electronic control, balances the braking force difference between the front and rear wheels of the vehicle, and thus significantly improves the braking performance, safety and stability of the vehicle. In the EBS, one of the key components to achieve its braking function is an electromagnetic valve, which adjusts the braking force by controlling the pressure of the brake chamber or hydraulic cylinder in order to complete the instruction of controlling the braking force issued by the electronic control unit of the EBS.

[0003] In order to achieve precise control of the braking force, the actual response speed of the electromagnetic valve (especially the flow speed of the fluid at the nozzle) should be fast enough to achieve the purpose of stabilizing the vehicle in the case of needing to quickly change the braking force, especially the case of needing to quickly change the braking force distribution between the wheels. In addition, the electromagnetic valve should cause as little noise as possible when working, so as to improve the riding experience of the vehicle passengers.

[0004] The electromagnetic valves applied in other fields also need to have the characteristics of fast response and low noise.

[0005] Therefore, it is necessary to propose a new nozzle and an electromagnetic valve comprising the nozzle in order to meet the above requirements. SUMMARY

[0006] The purpose of the present application is to provide a nozzle and an electromagnetic valve comprising the nozzle to solve at least one problem existing in the prior art.

[0007] The present application provides, in one aspect thereof, a nozzle configured for an electromagnetic valve, the nozzle comprising: a body portion defining a chamber; and a jet hole extending from the body portion, wherein an inlet for fluid to enter the chamber and an outlet for the fluid to flow out of the chamber are provided on the body portion, the outlet is connected with the jet hole so that the fluid can enter the nozzle from the inlet and flow out of the jet hole, a protrusion portion configured to cooperate with a valve core of the electromagnetic valve to form a seal is formed on the body portion, the outlet is provided on the protrusion portion so that the outlet is not in communication with the fluid between the inlet when the protrusion portion forms a seal with the valve core; a groove is provided on the protrusion portion.

[0008] In one embodiment, the body portion comprises a bottom portion and a wall portion extending perpendicularly to the bottom portion, the bottom portion has a circular shape and has a center, and the protrusion portion is provided at the center.

[0009] In an embodiment, the protrusion is formed as a circular protrusion, and the outlet is located at the center of the circular protrusion.

[0010] In an embodiment, the protrusion has a circular top and a side surrounding the circular top, the circular top is disposed at the geometric center of the protrusion, such that the outlet is located at the center of the circular top.

[0011] In an embodiment, the groove extends radially on both the circular top and the side.

[0012] In an embodiment, the groove has a substantially U-shaped shape as viewed from a direction perpendicular to the bottom.

[0013] In an embodiment, the inlet is located on the inner side of the wall portion away from the protrusion.

[0014] In an embodiment, the inlet comprises a plurality of sub-inlets, and the groove comprises a plurality of sub-grooves.

[0015] In an embodiment, each of the plurality of sub-inlets corresponds to at least one sub-groove, wherein each of the sub-inlets defines a first line passing through the center and the geometric center of the corresponding sub-inlet, and at least one of the sub-grooves extends along the first line.

[0016] The present application provides, in another aspect, an electromagnetic valve configured for an electronic brake system of a vehicle and comprising a spool assembly and the nozzle of the present application.

[0017] By providing a groove on the protrusion, the circulation of fluid within the chamber of the electromagnetic valve is improved, which reduces the actual response time of the electromagnetic valve and also reduces the noise generated when the electromagnetic valve is working. BRIEF DESCRIPTION OF DRAWINGS

[0018] Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings, which should not be considered limiting the scope of the application, and are intended to illustrate the application and to provide an enabling disclosure of the application, and thus, should not be considered as limiting the scope of the application. In the drawings:

[0019] Figure 1 A perspective view of a nozzle according to an embodiment of the present application is shown;

[0020] Figure 2 A top view of a nozzle according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present application will be described in detail below with examples. In the embodiments of the present application, the present application is described by taking the electromagnetic valve of the EBS system for a vehicle and the nozzle included in the electromagnetic valve as examples. However, those skilled in the art should understand that these exemplary embodiments do not mean any limitation on the present application. In addition, the features in the embodiments of the present application can be combined with each other without conflict. In different drawings, the same components are denoted by the same reference numerals, and other components are omitted for brevity, but this does not mean that the nozzle and the electromagnetic valve of the present application cannot include other components. It should be understood that the size, proportional relationship of the components in the drawings, and the number of components are not limitations on the present application.

[0022] It will be understood that, although the terms "first", "second", etc. can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.

[0023] Figure 1 A perspective view of a nozzle 100 according to an exemplary embodiment of the present application is shown, Figure 2 A top view of the nozzle 100 according to one embodiment of the present application is shown.

[0024] As Figure 1 shown, the nozzle 100 according to an exemplary embodiment of the present application includes a body portion 110. The body portion 110 is the main component of the nozzle 100, which functions to connect the orifice (to be described in detail below) 120 and the valve body (not shown) of the electromagnetic valve. Generally, the body portion 110 can define a chamber (valve chamber) together with the valve body, thereby forming a space for accommodating a valve core for blocking fluid communication and accommodating part of the fluid. An inlet 130 is provided on the body portion 110, thereby allowing the fluid to enter the chamber. At the same time, an outlet 140 is also provided on the body portion 110, so as to allow the fluid to flow out of the chamber.

[0025] The nozzle 100 further includes an orifice 120 extending from the body portion 110. The orifice 120 can have a gradually decreasing bore diameter, thereby achieving the purpose of spraying the fluid. Alternatively, the orifice 120 can simply be a passage having a uniform bore diameter, thereby being suitable for various different fluids or being suitable for different application scenarios. Obviously, the orifice 120 is connected with the outlet 140 of the body portion 110, so as to achieve the purpose of allowing the fluid to flow out of the chamber.

[0026] Preferably, the body portion 110 has a protrusion 111 configured to cooperate with the valve core of the solenoid valve to form a seal. The aforementioned outlet 140 is provided on the protrusion 111 such that when the protrusion 111 cooperates with the valve core to form a seal, fluid cannot flow from the chamber through the outlet 140 to the nozzle 120; that is, in this case, the outlet 140 and the inlet 130 are not in fluid communication. Thus, when the valve core cooperates with the protrusion 111 to form a seal, the solenoid valve containing the nozzle 100 is in a closed state; when the valve core moves away from the protrusion 111, the solenoid valve containing the nozzle 100 is in an open state.

[0027] It should be noted that the nozzles and orifices mentioned in this application do not necessarily mean that the fluid flowing out of the orifice is "ejected," i.e., the fluid itself has a certain pressure. This is only to illustrate that in a vehicle's EBS (Electronic Power Supply System), the fluid controlled by the solenoid valve has a certain pressure. In fact, the nozzle according to this application can be used in solenoid valves that realize the blocking or shut-off of any fluid flow.

[0028] Furthermore, such as Figure 1 and Figure 2 As shown, a groove 1110 is provided on the protrusion 111 of the nozzle 100 according to an exemplary embodiment of this application. By providing the groove 1110, more flow can be concentrated near the protrusion 111 and near the outlet 140. In this way, when the solenoid valve switches to the connected state, more fluid can quickly enter the required pipeline (in the case of the vehicle's EBS, the pneumatic pipeline controlling the brakes) through the outlet 140 under pressure in a short time, thereby reducing the time difference (hereinafter referred to as the actual response time) between the solenoid valve receiving the connected command and switching to the connected state (the valve core moves away from the protrusion, connecting the inlet and outlet) and the gas in the solenoid valve cavity entering the pneumatic pipeline and making the pneumatic pipeline actually connected. This means that the response speed of the solenoid valve becomes faster, thus enabling the vehicle's wheels to respond to the commands issued by the controller more quickly, improving the response speed of the vehicle's EBS. Furthermore, according to computer simulations, by setting a groove of appropriate size, the noise generated by the solenoid valve when switching to the connected state is reduced by 20% to 30%, which effectively reduces the noise of the solenoid valve and even the vehicle EMS during operation, and improves the comfort of passengers.

[0029] According to an exemplary embodiment of this application, the body portion 110 includes a bottom 112 and a wall portion 113 extending perpendicularly to the bottom. In this embodiment, with the nozzle 120 of the solenoid valve as the downward direction, the body portion 110 forms the lower surface and side surfaces of the chamber, while the valve body forms at least the upper surface of the chamber. Of course, it is conceivable that the valve body may also include additional portions that interact with the wall portion 113 to enhance the sealing of the chamber. Figure 2As shown, the bottom 112 has a circular shape and therefore a center. In a preferred embodiment, the protrusion 111 is located at the center of this circle. Thus, the protrusion 111 is located at the center of the entire bottom 112, making the entire nozzle 100 substantially centrally symmetrical. This facilitates fluid flow within the chamber and also increases the actual response speed of the solenoid valve, reducing the response time.

[0030] For the same reason, preferably, the protrusion 111 also has a circular shape and the outlet is located in the center of the protrusion 111, that is, the protrusion 111 and the bottom 112 are concentric circles and the outlet 140 is located at the common center of the two circles. In this case, the entire nozzle 100 is formed into a centrally symmetrical shape, which further facilitates the flow of fluid in the chamber and reduces the actual response time of the solenoid valve.

[0031] like Figure 1 As shown, according to an exemplary embodiment of the present application, the protrusion 111 has a side portion 1112 and a circular top portion 1113 that cooperates with the valve core. One side of the side portion 1112 is connected to the bottom portion 112 and the other side is connected to the circular top portion 1113, thereby surrounding the circular top portion 1113. Figure 1 The side portion 1112 has a two-section structure, including a first portion substantially perpendicular to the bottom 112 and a second portion connecting the first portion and the rounded top 1113. However, in other embodiments, the side portion 1112 may only include the portion perpendicular to the bottom, thereby forming the protrusion as a cylinder. The rounded top 1113, like the protrusion 111 and the bottom 112, has a substantially circular shape, and is located at the geometric center (center) of the protrusion 111. Therefore, the protrusion 111, the bottom 112, and the rounded top 1113 form a concentric circle structure, such that the outlet 140 is located at the geometric center (center) of the rounded top 1113. This configuration further facilitates fluid flow within the chamber and reduces the actual response time of the solenoid valve.

[0032] According to an exemplary embodiment of this application, the groove 1110 extends radially on both the circular top 1113 and the side portion 1112. That is, as Figure 2As shown, the recess 1110 is formed on a portion of the circular top 1113 and a portion of the side 1112, but not limited to being formed on the side 1112. According to simulation calculation, the smaller the distance between the edge of the recess 1110 and the outlet 140, the shorter the actual response time of the solenoid valve using the nozzle 100. It is noted that the distance between the edge of the recess 1110 and the outlet 140 needs to satisfy the reliability requirement to ensure the service life of the nozzle 100. Taking the nozzle 100 used in the solenoid valve in the EBS as an example, the distance between the edge of the recess 1110 and the outlet 140 can be set to be half of the diameter of the outlet 140, and the diameter of the circular top 1113 can be set to be about twice the diameter of the outlet.

[0033] Preferably, the recess 1110 has a substantially U-shaped shape as viewed from a direction perpendicular to the bottom 112. As shown, Figure 2 The recess 1110 has an arc-shaped edge on the side close to the outlet 140, which facilitates the formation of the recess 1110 on the protrusion 111 during the manufacturing process. The recess 1110 has a recess bottom, which is usually manufactured parallel to the bottom 112 of the body portion 110. Other arrangements are also possible, for example, the bottom of the recess 1110 can not be parallel to the bottom 112 of the body portion 110, but such a design is not advantageous in terms of noise reduction. In addition, the long sides of the recess 1110 can also not be parallel to each other, but each extends along the diameter at which it is located, so that the shape of the recess 1110 is substantially V-shaped. For another example, the recess 1110 can have a substantially rectangular shape, i.e., there is no arc-shaped edge.

[0034] Preferably, the inlet 130 is located on the inner side (the side close to the protrusion) of the wall portion 113 away from the protrusion 111. It can be seen that in the illustrated embodiment, the inlet 130 is almost in close contact with the wall portion 113, so as to leave sufficient distance between the outlet 140 and the inlet 130 to facilitate the arrangement of the pipeline outside the solenoid valve. It is conceivable that the inlet 130 can be located at any position of the bottom 112 as long as the arrangement requirement of the overall system and the sealing requirement of the solenoid valve itself can be met.

[0035] According to the exemplary embodiments of the present application, the inlet 130 includes a plurality of sub-inlets 131, and the recess 1110 includes a plurality of sub-recesses 1111. As shown, Figure 2 The inlet 130 includes six sub-inlets 131, and the recess 1110 includes six sub-recesses 1111. In other embodiments, the number of sub-inlets 131 and the number of sub-recesses 1111 can be different. The arrangement of the plurality of sub-inlets 131 and the plurality of sub-recesses 1111 can homogenize the flow of fluid in the chamber and provide a larger passage for the fluid to enter the chamber, thereby reducing the actual response time of the solenoid valve and reducing the noise generated by the solenoid valve.

[0036] In some embodiments, each of the plurality of sub-inlets 131 corresponds to at least one sub-groove 1111. That is, the diameter along which each sub-groove 1111 extends necessarily passes through one sub-inlet 131. In this way, the distance of fluid from the inlet 130 to the outlet 140 can be made as small as possible, thereby reducing the actual response time of the solenoid valve. More preferably, each sub-inlet 131 defines a first line 132 passing through the center of the circle and the geometric center of the corresponding sub-inlet 131 (that is, the first line is a diameter) and along which at least one sub-groove 1111 extends. In this case, it can be considered that each sub-inlet 131 has a sub-groove 1111 directly opposite it, thereby minimizing the distance from the inlet 130 to the outlet 140, accelerating the flow of fluid, and reducing the actual response time.

[0037] Of course, it is also possible that the sub-inlets 131 do not correspond at all or do not correspond completely to the sub-grooves 1111. Simulation data shows that the performance of the solenoid valve is only slightly deteriorated in these cases, typically not more than 5%, with a 2-3% increase in noise and almost no effect on response speed.

[0038] The above embodiments of the present application provide a nozzle. According to the technical solution of the present application, by providing a groove on the protruding portion of the body portion of the nozzle, the flow of fluid in the chamber is improved, thereby on the one hand reducing the time for the pipeline controlled by the solenoid valve to achieve communication after the solenoid valve switches to the communication state, reducing the actual response time of the solenoid valve, and on the other hand reducing the noise generated by the solenoid valve when it is working.

[0039] According to the exemplary embodiments of the present application, an electromagnetic valve configured for an electronic brake system of a vehicle and comprising a spool assembly and a nozzle is also provided. The nozzle is any of the above-described embodiments.

[0040] By using the nozzle according to the present application in the electromagnetic valve, the response speed of the EBS using the electromagnetic valve is faster and the working noise is reduced, so that the stability of the vehicle is increased and the comfort of the passengers is improved.

[0041] The present application has been described in detail above with specific reference to particular embodiments. It is clear, however, to a person skilled in the art that the above description and the embodiments shown in the drawings are to be understood as exemplary and not limiting. Various modifications or changes can be made to the present application without departing from the spirit thereof, and such modifications or changes are not to be regarded as a departure from the scope of the present application.

Claims

1. A nozzle (100) configured for use with a solenoid valve, the nozzle comprising: a body portion (110) defining a chamber; and a jet aperture (120) extending from the body portion, characterized in that an inlet (130) for fluid to enter the chamber and an outlet (140) for the fluid to exit the chamber are provided on the body portion, the outlet being connected with the jet aperture so that the fluid can enter the nozzle from the inlet and exit from the jet aperture, a protrusion (111) configured to cooperate with a spool of the solenoid valve to form a seal is formed on the body portion, the outlet being provided on the protrusion so that when the protrusion forms a seal with the spool, the outlet is not in fluid communication with the inlet, a recess (1110) is provided on the protrusion.

2. The nozzle of claim 1, wherein the body portion comprises a base portion (112) having a circular shape with a center and a wall portion (113) extending perpendicularly from the base portion, the protrusion being provided at the center of the base portion.

3. The nozzle of claim 2, wherein, the protrusion is formed as a circular protrusion, the outlet being located at the center of the circular protrusion.

4. A nozzle according to claim 2 or 3, characterised in that the protrusion has a circular top portion (1113) provided at the geometric center of the protrusion so that the outlet is located at the center of the circular top portion and a side portion (1112) surrounding the circular top portion.

5. The nozzle of claim 4, wherein, the recess extends radially on both the circular top portion and the side portion.

6. The nozzle of claim 5, wherein, the recess has a substantially U-shaped shape as seen in a direction perpendicular to the base portion.

7. A nozzle according to claim 2 or 6, characterised in that the inlet is located on an inner side of the wall portion away from the protrusion.

8. The nozzle of claim 7, wherein, the inlet comprises a plurality of sub-inlets (131), the recess comprises a plurality of sub-recesses (1111).

9. The nozzle of claim 8, wherein, each of the plurality of sub-inlets corresponds to at least one sub-recess, wherein each of the sub-inlets defines a first line (132) passing through the center and the geometric center of the corresponding sub-inlet, at least one of the sub-recesses extending along the first line.

10. An electromagnetic valve configured for use in an electronic brake system of a vehicle and comprising a spool assembly and a nozzle (100), characterized in that, the nozzle is according to any one of claims 1 to 9.

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