Proportional electromagnetic valve, braking system and vehicle

Abstract

The utility model relates to the technical field of vehicle braking, and discloses a proportional electromagnetic valve, a braking system and a vehicle. The proportional electromagnetic valve comprises a valve body and an electromagnetic mechanism. The valve body is connected with the electromagnetic mechanism; the electromagnetic mechanism comprises a valve rod and an electromagnetic assembly, the electromagnetic assembly is connected with the valve rod, and the electromagnetic assembly can push the valve rod to move towards the pressure space of the valve body; the electromagnetic assembly comprises a coil, a movable iron core and a pushing piece; an arc top is formed on the sealing part and used for abutting against the inner side and the outer side of the step groove of the valve rod. Through the arrangement of the arc top, the arc top can be exactly clamped into the step groove of the valve rod and is clamped with the inner wall and the outer wall of the step groove, double sealing is achieved, and therefore the sealing effect on the valve rod can still be achieved during oxidation or solidification. And due to the arc-shaped arrangement, when the valve rod is subjected to eccentric wear or offset, the arc-shaped arrangement can ensure that the arc top can still abut against the valve rod, so that the air tightness of the device is ensured, and the accurate control of the proportional electromagnetic valve is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, in particular to a proportional solenoid valve, a braking system and a vehicle. Background Art

[0002] With the increasing popularity of automobiles, driving safety is receiving increasing attention. Various control systems, such as lane departure warning systems, blind spot detection systems, lane keeping systems, automatic parking steering systems, and head-on collision avoidance systems, have emerged. Among these, collision avoidance systems are particularly important. Pressure control elements are crucial components in the brake lines of collision avoidance systems. These elements typically utilize a solenoid valve structure, providing pressure boost, pressure relief, and backup functions within the brake lines.

[0003] CN118810721A The utility model relates to the technical field of vehicle braking, and discloses a proportional solenoid valve, a braking system, a vehicle and a proportional solenoid valve control method. The utility model is provided with a valve body, an electromagnetic mechanism and a CAN bus; the electromagnetic mechanism is embedded in the valve body; the valve body is provided with an air inlet and a pressure space; the pressure space is arranged on the side of the electromagnetic mechanism facing the valve body; the electromagnetic mechanism includes a valve stem and an electromagnetic assembly, and the electromagnetic assembly can push the valve stem to move toward the pressure space; the valve stem is formed with an abutment portion, and the abutment portion can be formed by connecting a sealing rubber to the valve stem; when the abutment portion abuts against the valve body, the abutment portion is used to close the air inlet; when the valve stem moves toward the pressure space, the abutment portion separates from the valve body and gas enters the pressure space; the utility model controls an electromagnetic mechanism through the CAN bus to achieve pressure regulation of the brake line, thereby reducing control difficulty and improving braking efficiency; and the proportional solenoid valve can be balanced by the action of air pressure on the valve stem, thereby improving the driving experience of the driver.

[0004] In the prior art, a step groove is formed on the valve stem of the proportional solenoid valve toward the moving iron core, and the valve stem is abutted against a flat seal embedded in a pusher corresponding to the moving iron core to close the channel inside the valve stem. This sealing method is prone to insufficient airtightness when the valve stem is worn or offset and the seal is oxidized and solidified, thereby affecting the proportional control of the proportional solenoid valve and causing inaccurate pressure adjustment of the brake line. Utility Model Content

[0005] Long-term production practice has revealed that the valve stem of a proportional solenoid valve has a stepped groove formed on the side facing the moving iron core. The valve stem is abutted by a flat seal embedded in the pusher corresponding to the moving iron core to achieve a closed channel within the valve stem. This sealing method is prone to insufficient airtightness when the valve stem is worn or offset, or when the seal is oxidized and cured, thereby affecting the proportional control of the proportional solenoid valve and causing inaccurate pressure regulation in the brake line. In view of this, the purpose of the present utility model is to provide a proportional solenoid valve, a brake system, and a vehicle to at least address the above technical problems existing in the prior art.

[0006] In a first aspect, the present invention provides a proportional solenoid valve, comprising a valve body and an electromagnetic mechanism; the valve body is connected to the electromagnetic mechanism; the electromagnetic mechanism comprises a valve stem and an electromagnetic assembly, the electromagnetic assembly is connected to the valve stem, and the electromagnetic assembly can push the valve stem to move toward the pressure space of the valve body; the electromagnetic assembly comprises a coil, a moving iron core and a pushing member; the coil is arranged in the valve body, and the moving iron core is arranged in the coil; the pushing member is connected to the side of the moving iron core facing the pressure space; the pushing member comprises a sealing portion, and when the pushing member abuts against the valve stem, the sealing portion of the pushing member facing the pressure space side abuts against the valve stem to seal the pressure space; the sealing portion is formed with an arc top, and the arc top is used to abut against both the inner and outer sides of the step groove of the valve stem.

[0007] In one possible embodiment, the pushing member includes a main body; a connecting groove is formed on one side of the main body, and the connecting groove is used for providing clearance fit for the moving iron core; a sealing groove is formed on the other side of the main body, and the sealing groove is used for interference connection of the sealing part.

[0008] In one possible embodiment, the sealing portion includes an arc top, an embedded portion and a slider portion; the arc top is arranged on one side of the embedded portion, and the slider portion is arranged on the other side of the embedded portion; the slider portion is connected to the embedded portion through a spring and is accommodated in a slide groove formed by the embedded portion; when the spring is in a normal state, the slider portion protrudes from the embedded portion toward the plane of the main body; a positioning groove is formed on the main body, and the positioning groove is used for interference connection of the slider portion.

[0009] In one embodiment, the electromagnetic mechanism is embedded in the valve body; the CAN bus is electrically connected to the electromagnetic mechanism;

[0010] The valve body is provided with an air inlet and a pressure space, the air inlet is connected to the high-pressure equipment; the pressure space is provided on the side of the electromagnetic mechanism facing the valve body;

[0011] The electromagnetic assembly can push the valve stem toward the pressure space under the action of the CAN bus;

[0012] The valve stem is formed with an abutment portion, and when the abutment portion abuts against the valve body, the abutment portion is used to close the air inlet and the pressure space; when the valve stem moves toward the pressure space, the abutment portion is separated from the valve body, and the gas from the high-pressure equipment enters the pressure space; the pressure space is used for connection of the brake line.

[0013] In one possible embodiment, the valve body is formed with a sealing block; when the abutting portion abuts against the valve body, the abutting portion abuts against the sealing block.

[0014] In one possible embodiment, the valve body is also provided with an air outlet; the valve stem forms a hollow channel, one end of the valve stem faces the pressure space, and the other end of the valve stem faces the electromagnetic assembly; when the electromagnetic assembly moves toward the pressure space, the electromagnetic assembly abuts against the valve stem and continues to move, and the abutting portion is separated from the valve body; when the pressure in the pressure space is greater than the thrust of the electromagnetic assembly on the valve stem, the electromagnetic assembly moves back toward the valve stem under the action of pressure, the electromagnetic assembly is separated from the valve stem, and the pressure space is connected to the air outlet through the hollow channel.

[0015] In one possible embodiment, a diaphragm is provided in the valve body; the diaphragm is formed with a first clamping portion, a thin-walled portion and a second clamping portion; the first clamping portion is connected to the second clamping portion through the thin-walled portion; an abutment groove is provided on the valve stem, the first clamping portion of the diaphragm is embedded in the valve body, and the second clamping portion is clamped in the abutment groove; the second clamping portion and the thin-walled portion are in a "T" shape.

[0016] In one possible embodiment, a gas flow channel is formed in the valve body, and the gas flow channel at least connects the air inlet and the diaphragm, so that the gas pushes the valve stem through the diaphragm; the gas flow channel forms a bell mouth toward the diaphragm.

[0017] In a second aspect, the present invention provides a braking system, which includes any one of the proportional solenoid valves described above.

[0018] The utility model provides a vehicle in a third aspect, and the vehicle includes the proportional solenoid valve.

[0019] The utility model discloses a proportional solenoid valve, a braking system and a vehicle, comprising a valve body and an electromagnetic mechanism; the valve body is connected to the electromagnetic mechanism; the electromagnetic mechanism comprises a valve stem and an electromagnetic assembly, the electromagnetic assembly is connected to the valve stem, and the electromagnetic assembly can push the valve stem to move toward the pressure space of the valve body; the electromagnetic assembly comprises a coil, a moving iron core and a pushing member; the coil is arranged in the valve body, and the moving iron core is arranged in the coil; the pushing member is connected to the side of the moving iron core facing the pressure space; the pushing member comprises a sealing portion, and when the pushing member abuts against the valve stem, the sealing portion of the pushing member facing the pressure space side abuts against the valve stem to seal the pressure space; the sealing portion is formed with an arc top, and the arc top is used to abut against both the inner and outer sides of the step groove of the valve stem; through the arrangement of the arc top, the arc top can be just clamped into the step groove of the valve stem, and clamped with both the inner and outer walls of the step groove, thereby realizing double sealing, so that the valve stem can still be sealed during oxidation or solidification. Moreover, the arc-shaped setting can ensure that the top of the arc can still abut against the valve stem when the valve stem is worn or offset, thereby ensuring the airtightness of the device and thus ensuring the precise control of the proportional solenoid valve.

[0020] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a structural diagram of a proportional solenoid valve according to one embodiment of the present invention;

[0023] Figure 2 For an embodiment of the present utility model Figure 1 A partial enlarged structural diagram in the middle;

[0024] Figure 3 This is a diaphragm structure diagram of a proportional solenoid valve according to one embodiment of the present invention;

[0025] Figure 4 This is a structural diagram of the sealing portion of a proportional solenoid valve according to one embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 1. Valve body; 11. Air inlet; 12. Pressure space; 13. Diaphragm; 131. First clamping part; 132. Thin-walled part; 133. Second clamping part; 14. Elastic member; 15. Air outlet; 16. Sealing block; 2. Electromagnetic mechanism; 21. Valve stem; 211. Abutment part; 22. Electromagnetic assembly; 221. Coil; 222. Moving iron core; 223. Pusher; 224. Sealing part; 2241. Arc top; 2242. Embedded part; 2243. Slider part; 225. Main body; 2251. Positioning groove; 3. CAN bus; 31. Control circuit board; 4. Pressure sensor; 5. Gas flow channel; 51. Bell mouth. DETAILED DESCRIPTION

[0028] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0029] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate for the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices; "fixed" or "fixed connection" generally refers to common mechanical connection methods, such as threaded connection, welding or bonding.

[0031] After long-term production practice, it was found that the valve stem 21 of the proportional solenoid valve has a stepped groove formed on the side facing the movable iron core 222. The valve stem 21 is abutted by a flat seal embedded in the pusher 223 corresponding to the movable iron core 222 to achieve the purpose of sealing the channel within the valve stem 21. This sealing method is prone to insufficient airtightness when the valve stem 21 is worn or offset and the seal is oxidized and cured, thereby affecting the proportional control of the proportional solenoid valve and causing inaccurate pressure regulation of the brake line. In view of this, the purpose of the present utility model is to provide a proportional solenoid valve, a brake system and a vehicle to at least solve the above technical problems existing in the prior art.

[0032] Figure 1 This is a structural diagram of a proportional solenoid valve according to one embodiment of the present invention; Figure 2 For an embodiment of the present utility model Figure 1 The enlarged structure diagram of the part A in the middle; please refer to Figure 1 and Figure 2 ;

[0033] The utility model discloses a proportional solenoid valve, a braking system and a vehicle, comprising a valve body 1 and an electromagnetic mechanism 2; the valve body 1 is connected to the electromagnetic mechanism 2; the electromagnetic mechanism 2 comprises a valve stem 21 and an electromagnetic assembly 22, the electromagnetic assembly 22 is connected to the valve stem 21, and the electromagnetic assembly 22 can push the valve stem 21 toward the pressure space 12 of the valve body 1; the electromagnetic assembly 22 comprises a coil 221, a moving iron core 222 and a pushing member 223; the coil 221 is arranged in the valve body 1, and the moving iron core 222 is arranged in the coil 221; the pushing member 223 is connected to the side of the moving iron core 222 facing the pressure space 12; the pushing member 223 is connected to the side of the moving iron core 222 facing the pressure space 12; Component 223 includes a sealing portion 224. When the pusher 223 abuts the valve stem 21, the sealing portion 224 of the pusher 223 facing the pressure space 12 abuts the valve stem 21 to seal the pressure space 12. The sealing portion 224 is formed with an arc top 2241, which is used to abut both the inside and outside of the step groove of the valve stem 21. The arrangement of the arc top 2241 allows the arc top 2241 to fit neatly into the step groove of the valve stem 21 and engage both the inner and outer walls of the step groove, achieving a double seal. This allows the valve stem 21 to still be sealed during oxidation or curing. Furthermore, the arc-shaped arrangement ensures that the arc top 2241 can still abut against the valve stem 21 when the valve stem 21 is worn or deflected, thereby ensuring the airtightness of the device and the precise control of the proportional solenoid valve.

[0034] In the embodiment of the present invention, the sealing portion 224 is formed with an arc top 2241, which is used to abut against both the inner and outer sides of the step groove of the valve stem 21. Through the arrangement of the arc top 2241, the arc top 2241 can be precisely snapped into the step groove of the valve stem 21 and snapped into both the inner and outer walls of the step groove, achieving a double seal, thereby being able to still seal the valve stem 21 during oxidation or curing. Moreover, the arc-shaped arrangement ensures that the arc top 2241 can still abut against the valve stem 21 when the valve stem 21 is worn or deflected, thereby ensuring the airtightness of the device and the precise control of the proportional solenoid valve.

[0035] In the embodiment of the present utility model, in order to improve the air tightness of the original proportional solenoid valve, optimization related to improving the air tightness of the proportional solenoid valve is made on the pusher 223, diaphragm 13, air channel and valve body 1 of the proportional solenoid valve, as follows:

[0036] Figure 3 This is a diaphragm structure diagram of a proportional solenoid valve according to one embodiment of the present invention; Figure 4 This is a structural diagram of the sealing portion of a proportional solenoid valve according to one embodiment of the present invention. Figure 3 and Figure 4 ;

[0037] In an embodiment of the present invention, the sealing portion 224 includes a circular arc top 2241, an embedded portion 2242 and a slider portion 2243; the circular arc top 2241 is arranged on one side of the embedded portion 2242, specifically, the side of the embedded portion 2242 facing the pressure space 12; the slider portion 2243 is arranged on the other side of the embedded portion 2242; specifically, the side of the embedded portion 2242 facing the moving iron core 222; the slider portion 2243 is connected to the embedded portion 2242 through a spring, and the slider portion 2243 is accommodated in the slide groove formed by the embedded portion 2242; when the elastic member 14 is in a normal state, the slider portion protrudes from the embedded portion 2242 toward the plane of the main body 225; a positioning groove 2251 is formed on the main body 225, and the positioning groove 2251 is used for interference connection of the slider portion. The setting of the positioning groove 2251 can ensure that the sealing portion 224 is not easily offset in the main body 225, thereby achieving its positioning and fixing function. When the sealing portion 224 abuts against the valve body 1, the elastic member 14 is in a compressed state, and the spring can give the sealing portion 224 a force toward the valve stem 21, so that the arc top 2241 can be firmly abutted against the valve stem 21, thereby closing the hollow channel of the valve stem 21 and preventing gas leakage.

[0038] Furthermore, to ensure airtightness when the abutment portion 211 of the valve stem 21 abuts the valve body 1, the present invention provides a sealing block 16 on the side of the valve body 1 facing the abutment portion 211. Sealing block 16 can be made of rubber. When the abutment portion 211 abuts the valve body 1, it abuts against sealing block 16. The provision of sealing block 16 perfectly achieves opening and closing between the air inlet 11 and the pressure space 12, thereby achieving precise control of the proportional solenoid valve.

[0039] Furthermore, in order to improve the ability of pneumatic balancing, the present invention improves the diaphragm 13. In the present invention, a diaphragm 13 is arranged in the valve body 1; the diaphragm 13 is formed with a first clamping portion 131, a thin-walled portion 132 and a second clamping portion 133; the first clamping portion 131 is connected to the second clamping portion 133 through the thin-walled portion 132; an abutting groove is provided on the valve stem 21, the first clamping portion 131 of the diaphragm 13 is embedded in the valve body 1, and the second clamping portion 133 is clamped in the abutting groove; the second clamping portion 133 and the thin-walled portion 132 are in a "T" shape. By arranging the second clamping portion 133 and the thin-walled portion 132 in a "T" shape, the reverse elastic force of the diaphragm 13 can be better acted on the valve stem 21, thereby better realizing the function of the diaphragm 13 itself. On the other hand, by arranging the second clamping portion 133 and the thin-walled portion 132 in a "T" shape, the air tightness of the diaphragm 13 can be improved, and when the gas acts on the diaphragm 13 from the air inlet hole, the pressure of the gas can be better acted on the diaphragm 13 without leaking from the contact point between the diaphragm 13 and the valve stem 21, thereby improving the pneumatic balance ability of the proportional solenoid valve.

[0040] In the present invention, a gas flow channel 5 is formed in the valve body 1, connecting at least the gas inlet 11 and the diaphragm 13. To ensure that gas can better act on the diaphragm 13 and that the T-shaped structure of the diaphragm 13 can be better installed in the abutment groove, so that gas can pass through the diaphragm 13 to push the valve stem 21, a bell mouth 51 is formed on the gas flow channel 5 toward the diaphragm 13. This allows air pressure to better act on the thin wall of the diaphragm 13. The bell mouth 51 structure allows the second clamping portion 133 and the thin-walled portion 132 to form a "T"-shaped structure, which can be better installed in the ground groove of the valve stem 21.

[0041] The utility model proposes a proportional solenoid valve, which also includes a CAN bus 3; an electromagnetic mechanism 2 is embedded in the valve body 1; the CAN bus 3 is electrically connected to the electromagnetic mechanism 2; the valve body 1 is provided with an air inlet 11 and a pressure space 12, and the air inlet 11 is connected to the high-pressure equipment; the pressure space 12 is arranged on the side of the electromagnetic mechanism 2 facing the valve body 1; the electromagnetic mechanism 2 includes a valve stem 21 and an electromagnetic component 22, the electromagnetic component 22 is connected to the valve stem 21, and the electromagnetic component 22 can push the valve stem 21 toward the pressure space 12 under the action of the CAN bus 3; the valve stem 21 is formed with an abutment portion 211, and when the abutment portion 211 abuts against the valve body 1, the abutment portion 211 is used to close the air inlet 11 and the pressure space 12; when the valve stem 21 moves toward the pressure space 12, the abutment portion 211 is separated from the valve body 1, and the gas of the high-pressure equipment enters the pressure space 12; the pressure space 12 is used for connection of the brake line.

[0042] The utility model controls an electromagnetic mechanism 2 through the CAN bus 3 to adjust the pressure of the brake pipeline, thereby reducing the control difficulty of the proportional solenoid valve and improving the corresponding efficiency of brake management; and can achieve the follow-up balance of the proportional solenoid valve through the effect of air pressure on the valve stem 21, thereby improving the driver's driving experience.

[0043] In the embodiment of the present utility model, the valve body 1 refers to the main body 225 constituting the proportional solenoid valve, and the CAN bus 3 and the electromagnetic mechanism 2 are arranged in the proportional solenoid valve body 1; the CAN bus 3 is connected to the electromagnetic mechanism 2 through the control circuit board 31; wherein, the control circuit board 31 can be an MCU integrated board, and the CAN bus 3 can be connected to the vehicle controller to obtain the braking signal from the controller, and determine the MCU integrated board to generate a specified current according to the braking signal, and control the opening of the solenoid valve in the proportional solenoid valve by the size of the specified current, thereby controlling the size of the braking force in the brake pipeline.

[0044] The valve body 1 is also provided with an air inlet 11 and a pressure space 12. The air inlet 11 is connected to a high-voltage device; the high-voltage device is used to provide high pressure within the valve body 1. Specifically, it is used to transmit pressure to the pressure space 12, so that, through the action of a dynamic balance, the pressure corresponding to the current is accurately fed back to the brake line through a sensor. The pressure space 12 and the air inlet 11 can both be located on one side of the electromagnetic mechanism 2. Specifically, the pressure space 12 can be located on the side of the electromagnetic mechanism 2 facing the valve body 1. The electromagnetic mechanism 2 includes a valve stem 21 and an electromagnetic assembly 22. The electromagnetic assembly 22 is connected to the valve stem 21 and includes at least a solenoid valve. After the MCU integrated board generates current, the coil 221 within the solenoid valve generates an electromagnetic force, which drives the solenoid valve's moving iron core 222 to move, thereby pushing the valve stem 21. By controlling the current, the electromagnetic force can be controlled, ultimately controlling the movement of the valve stem 21. The air inlet 11 is located on one side of the solenoid valve. An air inlet valve, consisting of a valve body 1 and a valve stem 21, is formed between the air inlet 11 and the pressure chamber 12. Specifically, the valve stem 21 has an abutment 211. When the solenoid valve is not operating, the abutment 211 abuts against the valve body 1, forming the aforementioned air inlet valve and closing the air inlet valve. The abutment 211 serves to seal the air inlet 11 from the pressure chamber 12. When the valve stem 21 moves toward the pressure chamber 12 under the action of the solenoid assembly 22, the abutment 211 separates from the valve body 1, opening the air inlet valve and allowing gas from the high-pressure equipment to enter the pressure chamber 12 through the air inlet valve. The pressure chamber 12 is used to connect the brake lines. When the pressure in the pressure chamber 12 increases, the pressure acts on the push rod and the solenoid assembly 22, causing the valve stem 21 to abut against the valve body 1 and separate from the solenoid assembly 22, allowing the pressure chamber 12 to communicate with the air outlet 15, thereby achieving pressure relief. Specifically, the pressure sensor 4 may be connected to the pressure space 12 so that the pressure sensor 4 is connected to the brake line.

[0045] Figure 2 For an embodiment of the present utility model Figure 1 A partial enlarged structural diagram in the middle. Please refer to Figure 2 ;

[0046] In one embodiment, the valve body 1 is further provided with an air outlet 15; the valve stem 21 forms a hollow channel, one end of the valve stem 21 faces the pressure space 12, and the other end of the valve stem 21 faces the electromagnetic assembly 22; when the electromagnetic assembly 22 moves toward the pressure space 12, the electromagnetic assembly 22 abuts against the valve stem 21 and continues to move, and the abutting portion 211 is separated from the valve body 1; when the pressure in the pressure space 12 is greater than the thrust of the electromagnetic assembly 22 on the valve stem 21, the electromagnetic assembly 22 moves back toward the valve stem 21 under the action of pressure, the electromagnetic assembly 22 is separated from the valve stem 21, and the pressure space 12 is connected to the air outlet 15 through the hollow channel.

[0047] In this embodiment of the present invention, the valve body 1 is provided with an air outlet 15, which is located on the valve body 1 near the electromagnetic assembly 22 and is connected to the external environment. The valve stem 21 is provided with a hollow passage, which is axially extending inside the valve stem 21. One end of the hollow passage is connected to the pressure space 12, and the other end is arranged toward the electromagnetic assembly 22. When the electromagnetic assembly 22 pushes the valve stem 21 toward the pressure space 12, the end of the valve stem 21 abuts the electromagnetic assembly 22, forming an exhaust valve, thereby cutting off the passage between the pressure space 12 and the air outlet 15. The electromagnetic assembly 22, or solenoid valve, comprises a coil 221, a movable iron core 222, and a pusher 223. The coil 221 is disposed within the valve body 1, and the movable iron core 222 is disposed within the coil 221. When the coil 221 is energized, the movable iron core 222 moves under the electromagnetic force, thereby driving the pusher 223. The pusher 223 is connected to the side of the movable iron core 222 facing the pressure space 12. When the pusher 223 abuts the valve stem 21, the pusher 223 and the valve stem 21 cooperate to isolate the air outlet 15 from the hollow passage. Specifically, the pusher 223 comprises a main body 225 and a sealing portion 224. The main body 225 is the primary component of the pusher 223, and the sealing portion 224 may be a sealing rubber. A connecting groove is formed on one side of the main body 225, and the connecting groove is used for the clearance fit of the moving iron core 222; a sealing groove is formed on the other side of the main body 225, and the sealing groove is used for the connection of the sealing part 224; wherein, when the pushing member 223 abuts against the valve stem 21, the sealing part 224 abuts against the valve stem 21, thereby better isolating the pressure space 12 from the air outlet 15, thereby ensuring the stability of the braking.

[0048] When the electromagnetic assembly 22 is separated from the valve stem 21 under the action of the air pressure in the pressure space 12, the valve stem 21 is separated from the electromagnetic assembly 22, and the pressure space 12, the hollow channel and the air outlet 15 form an air outlet channel, so that the air pressure in the pressure space 12 is transported to the external environment.

[0049] In one embodiment, a diaphragm 13 is provided in the valve body 1 ; an abutting groove is provided on the valve stem 21 , one end of the diaphragm 13 is embedded in the valve body 1 , and the other end abuts in the abutting groove.

[0050] In an embodiment of the present invention, a diaphragm 13 is disposed within the valve body 1. The diaphragm 13 is embedded within the valve body 1 and abuts the valve stem 21. Specifically, the diaphragm 13 may include a connecting portion and a plate-like portion. The connecting portion is fixedly disposed within the valve body 1, while the plate-like portion is connected to an abutment groove and moves with the movement of the valve body 1. When air pressure is applied to the air inlet 11, gas acts on one side of the diaphragm 13 through the channel within the valve body 1, exerting a force on the diaphragm 13 toward the electromagnetic assembly 22, thereby bringing the valve stem 21 closer to the electromagnetic assembly 22. This maintains complete abutment between the valve stem 21 and the valve body 1, thereby sealing the air inlet 11 from the pressure space 12. When the sum of the force exerted by the air pressure within the pressure space 12 and the force applied to the diaphragm 13 equals the force exerted on the valve stem 21 by the electromagnetic assembly 22, the valve body 1 is in a balanced state with both the air inlet 11 and the air outlet 15 sealed. Furthermore, the diaphragm 13 prevents air pressure leakage from the air inlet 11.

[0051] In one embodiment, an elastic member 14 is provided between the valve stem 21 and the valve body 1 .

[0052] In the embodiment of the present invention, the valve stem 21 is provided with a protrusion for the elastic member 14 to abut against. When the valve stem 21 moves toward the pressure space 12, the elastic member 14 is in a compressed state, exerting a rightward force on the valve stem 21 to help the valve stem 21 reset.

[0053] Provide a specific embodiment:

[0054] When the controller sends a braking signal to the MCU circuit board through the CAN bus 3, the current size is determined according to the braking signal, and the current is input into the coil 221 of the solenoid valve, which can be a winding coil 221; the electromagnetic force F1 generated by the coil 221 drives the moving iron core 222 to move, so as to drive the valve stem 21 to move; at this time, because the movement of the valve stem 21 opens the abutment between the valve stem 21 and the valve body 1, the air inlet 11 and the pressure space 12 form an air inlet channel, and the air inlet 11 is connected to the high-pressure equipment. The high-pressure gas generated by the high-pressure equipment enters the pressure space 12 through the air inlet channel to achieve pressurization; when the pressure stabilizes, the pressure sensor 4 collects the pressure in the pressure space 12 as braking information and enters the brake pipeline for subsequent steps.

[0055] When a certain pressure is formed in the pressure space 12, the air pressure acts on the valve stem 21 and on the pusher 223 of the solenoid valve through the hollow channel, forming a force F2 on the pusher 223; and as the valve stem 21 moves toward the pressure space 12, the diaphragm 13 itself will deform and generate a deformation rebound force, which, together with the gas in the air inlet 11, applies a force to the diaphragm 13 toward the solenoid valve. The rebound force and the force on the diaphragm 13 form a force F3 on the diaphragm 13; when F2 + F3 = F1, the valve stem 21 abuts against the valve body 1 to close the air inlet 11, and the valve body 1 also abuts against the pusher 223 to close the air outlet 15, achieving pressure maintenance. At this time, the proportional solenoid valve is in a dynamic equilibrium state. Among them, when the valve body 1 and the valve stem 21 abut against the air inlet 11 to close the air inlet 11, the force of the air inlet 11 completely acts on one side of the diaphragm 13, applying a force to the diaphragm 13 toward the solenoid valve, thereby ensuring the closure of the air inlet 11.

[0056] When the force on the solenoid valve becomes smaller or is not exerted, the pressure in the pressure space 12 acts on the pusher 223 through the hollow channel, driving the pusher 223 and the moving iron core 222 to move back to the motion space. At this time, the pusher 223 is separated from the valve stem 21, and the pressure space 12 is connected to the air outlet 15 through the hollow channel of the valve stem 21 and the channel of the valve body 1, so as to output the high-pressure gas to the external environment to achieve pressure relief.

[0057] Through the above method, the pressure in the pressure space 12 can be controlled by the current, thereby achieving the function of proportional pressure output and improving the controllability of the automobile anti-collision system.

[0058] In a second aspect, the present invention provides a braking system, which includes any one of the proportional solenoid valves.

[0059] The utility model provides a third aspect of a braking system for a vehicle, which includes a proportional solenoid valve.

[0060] In a fourth aspect, the present invention proposes a proportional solenoid valve control method, which includes obtaining a braking signal from a CAN bus 3; determining a control current based on the braking signal; inputting the control current into an electromagnetic mechanism 2 to generate a thrust corresponding to the control current under electromagnetic action; and converting the thrust into the pressure of a pressure space 12 in the valve body 1 under the cooperation of the electromagnetic mechanism 2 and the valve body 1, and inputting the pressure into a brake pipeline.

[0061] It should be noted that for the aforementioned method embodiments, for simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required for the present invention.

[0062] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0063] In the several embodiments provided by the present invention, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0064] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0065] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0066] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the utility model, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, mobile terminal, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the utility model.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A proportional solenoid valve, characterized in that: It comprises a valve body (1) and an electromagnetic mechanism (2); the valve body (1) is connected to the electromagnetic mechanism (2); The electromagnetic mechanism (2) comprises a valve stem (21) and an electromagnetic assembly (22), wherein the electromagnetic assembly (22) is connected to the valve stem (21), and the electromagnetic assembly (22) is capable of pushing the valve stem (21) to move toward the pressure space (12) of the valve body (1); The electromagnetic assembly (22) includes a coil (221), a moving iron core (222) and a pusher (223); the coil (221) is arranged in the valve body (1), and the moving iron core (222) is arranged in the coil (221); the pusher (223) is connected to a side of the moving iron core (222) facing the pressure space (12); The pushing member (223) includes a sealing portion (224). When the pushing member (223) abuts against the valve stem (21), the sealing portion (224) of the pushing member (223) facing the pressure space (12) abuts against the valve stem (21) to seal the pressure space (12). The sealing portion (224) is formed with a circular arc top (2241), and the circular arc top (2241) is used to abut against both the inner and outer sides of the step groove of the valve stem (21).

2. The proportional solenoid valve according to claim 1, characterized in that: The pushing member (223) includes a main body (225); A connecting groove is formed on one side of the main body (225), and the connecting groove is used for clearance fitting of the moving iron core (222); a sealing groove is formed on the other side of the main body (225), and the sealing groove is used for interference connection of the sealing portion (224).

3. The proportional solenoid valve according to claim 2, characterized in that: The sealing portion (224) comprises a circular arc top (2241), an embedded portion (2242) and a sliding portion (2243); The arc top (2241) is arranged on one side of the embedded portion (2242), and the sliding block portion (2243) is arranged on the other side of the embedded portion (2242); The sliding block (2243) is connected to the embedded portion (2242) via a spring and is accommodated in a slide groove formed by the embedded portion (2242); when the spring is in a normal state, the sliding block (2243) protrudes from the embedded portion (2242) toward the plane of the main body (225); A positioning groove (2251) is formed on the main body (225), and the positioning groove (2251) is used for interference connection of the slider portion (2243).

4. The proportional solenoid valve according to claim 1, characterized in that: The proportional solenoid valve further comprises a CAN bus (3); the electromagnetic mechanism (2) is embedded in the valve body (1); the CAN bus (3) is electrically connected to the electromagnetic mechanism (2); The valve body (1) is provided with an air inlet (11) and a pressure space (12), wherein the air inlet (11) is connected to a high-pressure device; the pressure space (12) is provided on a side of the electromagnetic mechanism (2) facing the valve body (1); The electromagnetic assembly (22) is capable of pushing the valve stem (21) toward the pressure space (12) under the action of the CAN bus (3); The valve stem (21) is formed with an abutting portion (211). When the abutting portion (211) abuts against the valve body (1), the abutting portion (211) is used to close the air inlet (11) and the pressure space (12); when the valve stem (21) moves toward the pressure space (12), the abutting portion (211) separates from the valve body (1), and the gas of the high-pressure equipment enters the pressure space (12); the pressure space (12) is used for connection of a brake line.

5. The proportional solenoid valve according to claim 4, characterized in that: The valve body (1) is formed with a sealing block (16); When the abutting portion (211) abuts against the valve body (1), the abutting portion (211) abuts against the sealing block (16).

6. The proportional solenoid valve according to claim 4, characterized in that: The valve body (1) is also provided with an air outlet (15); The valve stem (21) is formed with a hollow channel, one end of the valve stem (21) faces the pressure space (12), and the other end of the valve stem (21) faces the electromagnetic assembly (22); When the electromagnetic assembly (22) moves toward the pressure space (12), the electromagnetic assembly (22) abuts against the valve stem (21) and continues to move, and the abutting portion (211) separates from the valve body (1); When the pressure in the pressure space (12) is greater than the thrust of the electromagnetic assembly (22) on the valve stem (21), the electromagnetic assembly (22) moves away from the valve stem (21) under the action of the pressure, the electromagnetic assembly (22) is separated from the valve stem (21), and the pressure space (12) is connected to the air outlet (15) through the hollow channel.

7. The proportional solenoid valve according to claim 6, characterized in that: A diaphragm (13) is provided in the valve body (1); the diaphragm (13) is formed with a first clamping portion (131), a thin-walled portion (132), and a second clamping portion (133); the first clamping portion (131) is connected to the second clamping portion (133) via the thin-walled portion (132); The valve stem (21) is provided with an abutment groove, the first clamping portion (131) of the diaphragm (13) is embedded in the valve body (1), and the second clamping portion (133) is clamped in the abutment groove; The second clamping portion (133) and the thin-walled portion (132) are in a "T" shape.

8. The proportional solenoid valve according to claim 7, characterized in that: A gas flow channel (5) is formed in the valve body (1), and the gas flow channel (5) at least connects the gas inlet (11) and the diaphragm (13), so that the gas passes through the diaphragm (13) to push the valve stem (21); The gas flow channel (5) is formed with a bell mouth (51) toward the diaphragm (13).

9. A braking system, characterized in that: The braking system comprises the proportional solenoid valve according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle comprises the proportional solenoid valve according to any one of claims 1 to 8.

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