Three-way valve, oil supply system and vehicle

Abstract

The application relates to the technical field of vehicle oil supply devices, and provides a three-way valve, an oil supply system and a vehicle. The three-way valve comprises a valve body and a valve core capable of sliding in the cavity of the valve body, two sides of the valve body along a first direction are respectively provided with first channels, and the valve body is provided with a second channel. The valve core can slide along the first direction under the push of the fluid flowing into the cavity from one of the first channels, part of the valve core is inserted into the other first channel, and the communication port of the first channel and the cavity is blocked, so that the fluid can flow out of the second channel. The three-way valve provided by the application does not need to be provided with an actuator, and the structure is simple. When the three-way valve is applied to the oil supply system, the valve core can be partially inserted into one of the first channels while sliding with the fluid, the first channel can be better blocked, the other first channel and the second channel are communicated, and different oil tanks can be conveniently applied for oil supply.

Description

Technical Field

[0001] This application relates to the field of vehicle fuel supply device technology, and particularly to a three-way valve. This application also relates to a fuel supply system using the three-way valve, and a vehicle using the fuel supply system. Background Technology

[0002] A three-way valve is a valve device with three flow ports. It controls the flow direction of fluid by moving or rotating the valve core, so as to realize the diversion, merging or switching of fluid flow.

[0003] Existing three-way valves with movable valve cores generally include a valve body, a valve core housed within the valve body, and an actuator mounted on the valve body to drive the valve core. The valve body has three flow channels, and the actuator drives the valve core to move, changing the on / off state of the flow channels. This type of three-way valve structure, with its actuator, is relatively complex. Utility Model Content

[0004] In view of this, this application aims to propose a three-way valve that does not require an actuator and has a better technical effect in controlling the flow direction of fluid.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A three-way valve includes a valve body and a valve core that can slide within a cavity of the valve body; The valve body is provided with a first channel on both sides along the first direction, and the valve body is provided with a second channel; Driven by fluid flowing into the cavity from one of the first passages, the valve core is slidable along the first direction, and a portion of the valve core is inserted into another of the first channels, blocking the connection between the first channel and the cavity, so that the fluid can flow out from the second channel.

[0006] Furthermore, the valve core is slidably disposed within the cavity via a mounting bracket; The mounting bracket includes a connector and fixing members respectively connected to both sides of the connector; The valve core is connected to the fixing members on both sides respectively.

[0007] Furthermore, each of the aforementioned fasteners includes a fixing plate that slides axially along the cavity, and each fixing plate has an opening extending through it; and / or, The connector includes multiple connecting rods, which are spaced apart around the axial direction of the cavity. Each connecting rod extends along the axial direction of the cavity and its two ends are respectively connected to the fixing members on both sides.

[0008] Furthermore, a groove is provided on the outer surface of the valve core, and a portion of the fixing member is embedded in the groove.

[0009] Furthermore, the valve core has insertion portions located on both sides of itself, and each portion of the insertion portion can be inserted into the first channel on the corresponding side; Each of the insertion parts is conical, and the diameter of one end of each insertion part inserted into the first channel is smaller than the diameter of the other end of the insertion part.

[0010] Furthermore, the insertion portions on both sides are connected by connecting portions, and the diameter of the connecting portions gradually increases from the middle of the connecting portions along the first direction to near each insertion portion.

[0011] Furthermore, the valve body includes a valve body body formed with the cavity, a first connecting pipe formed with each of the first channels, and a second connecting pipe formed with the second channel; The valve body, each of the first connecting pipes and the second connecting pipes are connected together, and a sealing ring is fitted on the first connecting pipe and / or the second connecting pipe.

[0012] Furthermore, at least one of the valve core and the mounting bracket is covered with a friction-reducing coating; and / or, The valve body is made of a conductive material, and the valve core is made of an elastic material.

[0013] Compared with related technologies, this application has the following advantages: (1) The three-way valve described in this application does not require an actuator and has a simple structure. When applied to a fuel supply system, the valve core can slide with the fluid and partially insert into one of its first channels. Since the valve core is partially inserted into the first channel, it can effectively block the first channel, allowing the other first channel and the second channel to connect. This makes it convenient to use different fuel tanks for fuel supply, and the fluid can also flow back to each first channel from the second channel. For example, if the fuel depressurized by the engine's high-pressure fuel pump flows back to the engine's fuel inlet pipe, the fuel can also flow back to the fuel tank through the three-way valve, thereby preventing excessive fuel pressure from causing the pipeline to rupture and improving the safety and reliability of the fuel supply system.

[0014] (2) The valve core slides in the cavity with the help of the mounting bracket. The mounting bracket can be made of a material with high structural strength and low sliding resistance, while the valve core can be made of a material with good sealing performance. In this way, the mounting bracket and the valve core are made of different materials, and each plays its own function and role. This can take into account the smoothness of sliding and the reliability of sealing the first channel, so that the fluid can flow smoothly along the desired path.

[0015] (3) The fixed plate slides along the cavity axis and usually fits with the inner circumferential wall of the valve body cavity to ensure that the fixed plate moves in a precise direction without deflection. The opening can balance the pressure on both sides of the fixed plate, reduce the movement resistance of the fixed plate, and the opening can form a passage for fluid flow. Multiple connecting rods are set, each extending along the cavity axis. The two ends of each connecting rod are connected to the fixing parts on both sides, which can form a stable rigid frame, which can not only fix the valve core well, but also slide smoothly in the cavity.

[0016] (4) A groove is provided on the outer surface of the valve core. After the fixing part is partially embedded in the groove of the valve core, the connection reliability between the valve core and the fixing part can be improved, so that the valve core slides smoothly with the fixing part, and there is no relative movement between the valve core and the fixing part in the first direction during the sliding process.

[0017] (5) Each insertion part of the valve core is conical. The diameter of one end of each insertion part inserted into the first channel is smaller than the diameter of the other end of the insertion part, so that each insertion part can be smoothly inserted into the first channel on the corresponding side and the sealing effect is good. The two insertion parts each form an independent sealing surface. No matter which side the fluid flows in from, the conical surface can smoothly seal the first channel on the corresponding side.

[0018] (6) The insertion parts on both sides are connected by the connecting parts, and the force transmission process is smooth, which makes it easy to seal the first channel that should be sealed. From the middle of the connecting part along the first direction to near each insertion part, the diameter of the connecting part gradually increases, which can make the stress evenly distributed along the length of the connecting part and reduce the stress concentration coefficient, thereby significantly improving the bending strength of the valve core and helping to improve the service life of the valve core.

[0019] (7) The valve body includes the valve body body, the first connecting pipe and the second connecting pipe, and the three are connected together to improve the convenience of the three-way valve application. A sealing ring is fitted on at least one of the first connecting pipe and the second connecting pipe, which can be easily matched with the counter parts, thereby improving the sealing performance between the counter parts.

[0020] (8) Covering the surface of the mounting bracket with a friction-reducing coating helps to reduce the sliding resistance of the mounting bracket relative to the valve body. Covering the surface of the valve core with a friction-reducing coating allows the valve core to be smoothly inserted and removed from the first channel. The valve body is made of conductive material, which has a good conductivity and can discharge static electricity to prevent the risk of fire caused by static electricity.

[0021] Another objective of this application is to provide a fuel supply system, including a three-way valve as described above, and two fuel tanks respectively connected to two first channels of the three-way valve, wherein the second channel of the three-way valve is used to connect to an engine.

[0022] The oil supply system described in this application, by employing the aforementioned three-way valve, allows the valve core to partially insert into one of its first channels as the fluid slides, effectively sealing the first channel and connecting the other first channel and the second channel. This facilitates the use of different oil tanks for oil supply. The fluid can also flow back from the second channel to each of the first channels, thereby preventing excessive oil pressure from causing pipeline rupture and improving the safety and reliability of the oil supply system.

[0023] Meanwhile, another object of this application is to provide a vehicle equipped with the fuel supply system described above.

[0024] The vehicle described in this application has the same beneficial effects as the aforementioned fuel supply system compared to the prior art, and will not be repeated here. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an exemplary structural diagram of the three-way valve described in an embodiment of this application; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 For along Figure 2 Sectional view of line AA in the middle; Figure 4 This is an exemplary structural diagram of the three-way valve without the valve body assembled according to an embodiment of this application; Figure 5 This is an exemplary structural diagram of the mounting bracket described in an embodiment of this application; Figure 6 This is an exemplary structural diagram of the valve core described in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures: 1. Valve body; 101. Valve body; 102. First connecting pipe; 103. Second connecting pipe; 1011, cavity; 1021, first channel; 1031, second channel; 2. Valve core; 201. Groove; 202. Insertion part; 203. Connecting part; 3. Mounting bracket; 301. Connector; 302. Fixture; 3021. Opening; 4. Sealing ring. Detailed Implementation

[0027] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0029] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0031] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0033] Example 1 An embodiment of the first aspect of this application provides a three-way valve that does not require an actuator to drive the valve core, has a simple structure, and has a good technical effect in controlling the flow direction of fluid.

[0034] In related technologies, a three-way valve is a valve device with three flow ports. It controls the flow direction of fluid by moving or rotating the valve core, so as to realize the diversion, merging or switching of fluid flow direction.

[0035] Existing three-way valves generally include a valve body, a valve core, and an actuator. The valve core is located within the cavity of the valve body, and the actuator is located on the valve body, with the valve body and actuator connected. The valve body has three flow channels, and the actuator drives the valve core to move. The movement or rotation of the valve core can change the on / off state of the flow channels.

[0036] This application relates to a three-way valve with a movable valve core, particularly a three-way valve used in a vehicle's fuel supply system. To better understand the three-way valve of this application, a brief description of a vehicle's fuel supply system will be provided first.

[0037] With the increasing demand for travel, improving the driving range of vehicles has become an urgent need. Traditional single-tank systems often cannot meet consumers' high demands for driving range during long-distance travel, especially given fluctuations in fuel prices and uneven distribution of gas stations, leading to inconvenience in refueling and driving interruptions. Therefore, adopting a dual-tank fuel supply system has become one of the effective solutions to meet the demand for fuel tank capacity.

[0038] There are roughly two types of dual-tank fuel supply systems for gasoline on the market, based on their structure.

[0039] The first type involves connecting two fuel tanks in series, with the engine's fuel inlet pipe connected only to one of the main fuel tanks, which supplies fuel to the engine. This structure is essentially an expansion of the capacity of a single fuel tank.

[0040] The second method involves using a T-connector to connect the fuel inlet pipes of the two fuel tanks together and then to the engine, using only one fuel tank during switching. This structure is essentially a parallel branch, which can cause fuel from one fuel tank's supply line to enter the other fuel tank during actual use. To avoid this, a check valve is usually added to the fuel supply lines of the two fuel tanks.

[0041] In related technologies, while conventional check valves can be used directly, static electricity may be generated during the use of the oil supply system, posing a risk of fire due to static electricity. Therefore, conventional check valves need to have their conductivity improved before use, and the opening speed and closing sealing performance of the check valves also need to be enhanced.

[0042] In addition, because the one-way valve cannot prevent fuel from flowing back to the fuel tank, under certain operating conditions, fuel depressurized by the engine's high-pressure fuel pump will flow back to the engine's fuel inlet pipe, causing increased pressure in the pipe. Excessive pressure may cause the pipe to rupture.

[0043] In view of this, in order to overcome at least one deficiency in the related technology, the three-way valve in this embodiment combines... Figures 1 to 3 As shown, the overall design includes a valve body 1 and a valve core 2 that can slide within the cavity 1011 of the valve body 1.

[0044] The valve body 1 has a first channel 1021 on each side along the first direction, and a second channel 1031 on the valve body 1. Driven by the fluid flowing into the cavity 1011 from one of the first channels, the valve core 2 can slide along the first direction, and part of the valve core 2 is inserted into the other first channel 1021, blocking the connection between the first channel 1021 and the cavity 1011, so that the fluid can flow out from the second channel 1031.

[0045] In one example, the length direction of each first channel 1021 is along the first direction, the length direction of the second channel 1031 is orthogonal to the first direction, and the connection port between the second channel 1031 and the cavity 1011 is located between the cavity 1011 and the two connection ports of the two first channels 1021.

[0046] The three-way valve in this embodiment does not require an actuator and has a simple structure. When applied to an oil supply system, the valve core 2 can slide with the fluid and partially insert into one of its first channels 1021. Since the valve core 2 is partially inserted into the first channel 1021, it can effectively block the first channel 1021, allowing the other first channel 1021 and the second channel 1031 to connect. This makes it convenient to use different oil tanks for oil supply and can also eliminate the one-way valve in the original oil supply system, which helps to save costs.

[0047] For example, refer to Figure 3 As shown, when the three-way valve is applied to the fuel supply system, the first channel 1021 on the left is connected to the main fuel tank, the first channel 1021 on the right is connected to the auxiliary fuel tank, and the second channel 1031 is connected to the engine's fuel inlet.

[0048] When the main oil tank is supplied with oil, the valve core 2, driven by the oil, can block the connection between the right first channel 1021 and the tank body, and the oil in the main oil tank can flow to the engine through the left first channel 1021, the cavity 1011 and the second channel 1031.

[0049] When the auxiliary oil tank supplies oil, the valve core 2, driven by the oil, can block the connection between the left first channel 1021 and the tank body, and the oil in the auxiliary oil tank can flow to the engine through the right first channel 1021, the cavity 1011 and the second channel 1031.

[0050] Under certain operating conditions, if the fuel depressurized by the engine's high-pressure fuel pump flows back to the engine's fuel inlet pipe, the fuel can also flow back to the main fuel tank through the second channel 1031, the cavity 1011, and the left first channel 1021, or the fuel can also flow back to the auxiliary fuel tank through the second channel 1031, the cavity 1011, and the right first channel 1021. This prevents excessive fuel pressure from causing pipeline rupture and improves the safety and reliability of the fuel supply system.

[0051] To improve the performance of the three-way valve, in some exemplary embodiments, the valve core 2 is slidably disposed within the cavity 1011 via a mounting bracket 3. As in this embodiment, the mounting bracket 3 includes a connector 301 and fixing members 302 respectively connected to both sides of the connector 301, and the valve core 2 is respectively connected to the fixing members 302 on both sides.

[0052] In this embodiment, the valve core 2 serves as the core component for controlling the fluid flow direction. It changes the on / off state of the flow channel by sliding or moving, such as switching between diversion, merging, or flow direction. The valve core 2 is typically made of wear-resistant and corrosion-resistant materials such as stainless steel, ceramics, or engineering plastics to adapt to different media and operating conditions.

[0053] In this embodiment, the valve core 2 is preferably made of an elastic material, such as rubber or silicone. Therefore, the valve core 2 is fixed on the mounting bracket 3, and the valve core 2 is slidably disposed in the cavity 1011 via the mounting bracket 3. The mounting bracket 3 can be made of a wear-resistant material with low sliding resistance, which facilitates the smooth sliding of the valve core 2 within the valve body 1 along with the mounting bracket 3.

[0054] The connector 301 serves as a connection structure for the fixing members 302 on both sides. It may be rod-shaped, plate-shaped, or frame-shaped. It is used to connect the fixing members 302 on both sides and transmit driving force. The fixing members 302 are symmetrically distributed on both sides of the connector 301. The fixing members 302 on both sides are directly connected to the valve core 2, providing stable support and limiting the movement trajectory of the valve core 2. Specifically, it limits the valve core 2 to slide along the first direction. The fixing members 302 on both sides are connected through the connector 301, which facilitates the smooth and stable sliding of the mounting bracket 3 within the cavity 1011.

[0055] Both fixing members 302 on both sides are used to connect with the valve core 2, which can play a good role in fixing the valve core 2 and facilitate the smooth and stable sliding of the valve core 2 with the fixing member 302. The connecting member 301, as the connecting structure between the two fixing members 302, can connect the fixing members 302 on both sides together, further ensuring the smooth and stable sliding of the mounting bracket 3 within the cavity 1011.

[0056] like Figure 4 and Figure 5As shown, in some exemplary embodiments, each fastener 302 includes a fixing plate that slides along the axial direction of the cavity 1011, and each fixing plate has an opening 3021 that passes through it.

[0057] In a preferred embodiment, the cavity 1011 is cylindrical in shape, and its axial direction extends along a first direction. Each fixing plate is circular, and its outer peripheral wall mates with the inner peripheral wall of the cavity 1011, allowing the fixing plate to slide smoothly and steadily within the cavity 1011. The sliding of the fixing plate along the axial direction of the cavity 1011, and its engagement with the inner peripheral wall of the valve body 1 cavity 1011, ensures that the fixing member 302 moves precisely and without wobbling along the first direction.

[0058] In a preferred embodiment, the number of openings 3021 is three, and the three openings 3021 are distributed at intervals around the axial direction of the fixed plate, each opening 3021 being arc-shaped. It should be understood that the number of openings 3021 can be one, two, four, five, etc., in addition to three. The shape of the openings 3021 can be other shapes besides arc-shaped, such as circles, squares, triangles, etc.

[0059] The opening 3021 in this application can serve as a passage for the cavity 1011 to flow through the fixed plate. The opening 3021 can also balance the pressure on both sides of the fixed plate and reduce the resistance to the sliding of the fixing member 302.

[0060] To facilitate the smooth and stable sliding of the mounting bracket 3, please refer to... Figure 4 and Figure 5 As shown, in some exemplary embodiments, the connector 301 includes a plurality of connecting rods that are circumferentially spaced around the cavity 1011, each connecting rod extending axially along the cavity 1011 and having its two ends connected to the fixing members 302 on both sides.

[0061] In the above implementation, multiple connecting rods are provided, each extending along the axial direction of the cavity 1011. The two ends of each connecting rod are connected to the fixing parts 302 on both sides, forming a stable rigid frame that can not only fix the valve core 2 well, but also slide smoothly within the cavity 1011.

[0062] For example, in one embodiment, there are four connecting rods. These four connecting rods are evenly spaced along the circumference of the cavity 1011, forming a stable whole with the fixing members 302 on both sides. This results in a lightweight structure with high structural strength. It should be understood that the number of connecting rods can be other than four, such as two, three, or five.

[0063] In a preferred example, the cross-sectional shape of the connecting rod is rectangular. In addition, the cross-sectional shape of the connecting rod may be other shapes, such as circular, elliptical, square, etc.

[0064] In a preferred embodiment, the mounting bracket 3 has a symmetrical structure along the first direction, which facilitates processing. For example, in one embodiment, each connecting rod is composed of two half-rods connected together, and the two half-rods are respectively connected to the fixing members 302 on both sides. The two half-rods of each connecting rod are connected together by one of the following methods: screwing, snap-fitting, and adhesive bonding.

[0065] It should be noted that the structure of the mounting bracket 3 described above is only an exemplary implementation. The mounting bracket 3 can of course adopt other structures, as long as they meet the following functions: the mounting bracket 3 can slide smoothly relative to the valve body 1 within the cavity 1011; the mounting bracket 3 can fix the valve core 2 and connect with the valve core 2; and the mounting bracket 3 does not affect the flow of fluid.

[0066] To improve the reliability of the valve core 2's movement, in some exemplary embodiments, a groove 201 is provided on the outer surface of the valve core 2, and a portion of the fixing member 302 is embedded in the groove 201. In one example, there are two grooves 201, which are spaced apart along a first direction. Each groove 201 is distributed circumferentially along the outer surface of the valve core 2. The aforementioned two fixing members 302 are partially embedded in the two grooves 201 respectively, so that the valve core 2 can drive the fixing member 302 to slide smoothly and easily within the cavity 1011, and the valve core 2 and the fixing member 302 will not move relative to each other in the first direction.

[0067] In a preferred embodiment, the cross-sectional shape of the groove 201 can be rectangular, V-shaped, U-shaped or dovetail-shaped. After the valve core 2 is partially embedded in the fixing member 302, the connection reliability between the valve core 2 and the fixing member 302 can be improved, so that the valve core 2 can slide smoothly with the fixing member 302.

[0068] In a preferred embodiment, the depth of the groove 201 needs to match the embedded portion of the fastener 302, for example, between 5% and 20% of the diameter of the valve core 2, such as 5%, 8%, 10%, 14%, 17%, 20%, etc., to ensure connection strength while avoiding weakening the structure of the valve core 2.

[0069] In some exemplary embodiments, the valve core 2 has insertion portions 202 located on both sides of itself, and a portion of each insertion portion 202 can be inserted into the first channel 1021 on the corresponding side. Each insertion portion 202 is conical, and the diameter of the end of each insertion portion 202 that is first inserted into the first channel 1021 is smaller than the diameter of the other end of the insertion portion 202.

[0070] Each insertion part 202 of the valve core 2 is conical. The diameter of one end of each insertion part 202 is smaller than the diameter of the other end of the insertion part 202 when it is first inserted into the first channel 1021, so that each insertion part 202 can be smoothly inserted into the first channel 1021 on the corresponding side and the sealing effect is good. The two insertion parts 202 on both sides form independent sealing surfaces. No matter which side the fluid flows in from, the conical surface can smoothly seal the first channel 1021 on the corresponding side.

[0071] It should be noted that, in specific implementation, valve core 2 can be designed as two valve cores, which are respectively fixed on two fixing parts 302. The two valve cores 2 can be inserted into the first channel 1021 on the corresponding side, and the two valve cores 2 can block the first channel 1021 on the corresponding side under the push of the fluid.

[0072] In a preferred embodiment, the valve core 2 has a symmetrical structure along a first direction, with independent insertion portions 202 extending from both ends. The insertion portions 202 are tapered, and each insertion portion 202 can effectively seal the connection between the first channel 1021 and the cavity 1011 on the corresponding side of the first channel 1021. Even if the fluid pressure is low, the insertion portion 202 of the valve core 2 can be smoothly inserted into the first channel 1021 on the corresponding side.

[0073] Furthermore, when the valve core 2 with the tapered insertion portion 202 is fitted with first channels 1021 of different diameters, the same valve core 2 can be fitted with various first channels 1021 of different specifications due to the tapered shape of the valve core 2, thus achieving a good sealing effect. The tapered design of the valve core 2 can significantly improve its applicability and ensure its sealing effect.

[0074] To improve the ease of use, in some exemplary embodiments, the two insertion portions 202 are connected by a connecting portion 203, and the diameter of the connecting portion 203 gradually increases from the middle of the connecting portion 203 along a first direction to near each insertion portion 202.

[0075] In this embodiment, the two insertion parts 202 are connected by a connecting part 203, which facilitates the smooth sliding of the valve core 2 and the sealing of the first channel 1021. Specifically, when the two insertion parts 202 are connected together by the connecting part 203, one insertion part 202 is pushed by the fluid, and the thrust can be directly transmitted to the other insertion part 202 through the connecting part 203. The force transmission process is simple and can ensure that the other insertion part 202 can smoothly seal the first channel 1021 on the corresponding side.

[0076] In addition, when the two insertion parts 202 are not connected together by the connecting part 203, one insertion part 202 is pushed by the fluid, and the thrust can be transmitted to the mounting bracket 3 through the connecting part 203 first, and then to the other insertion part 202 through the mounting bracket 3. The force transmission process is relatively tortuous.

[0077] Furthermore, the diameter of the connecting portion 203 gradually increases from the center to both ends, forming a double-conical structure that effectively disperses the bending load borne by the valve core 2. During valve opening and closing, the valve core 2 often experiences bending stress due to medium pressure, fluid impact, or mechanical vibration. Traditional constant-diameter connecting portions 203 are prone to stress concentration in the central region, leading to fatigue crack initiation. The gradually changing diameter design, through geometric optimization, allows for a uniform stress distribution along the length of the connecting portion 203, reducing the stress concentration factor and significantly improving the bending strength of the valve core 2, thus extending its service life. Still refer to Figures 1 to 3 As shown, in some exemplary embodiments, the valve body 1 includes a valve body 101 with a cavity 1011, a first connecting pipe 102 with first channels 1021 respectively, and a second connecting pipe 103 with a second channel 1031. The valve body 101, the first connecting pipes 102 and the second connecting pipe 103 are connected together, and a sealing ring 4 is fitted on the first connecting pipe 102 and / or the second connecting pipe 103.

[0078] It should be noted that it is acceptable to install the sealing ring 4 only on the first connecting pipe 102, it is acceptable to install the sealing ring 4 only on the second connecting pipe 103, and it is also acceptable to install the sealing ring 4 on both the first connecting pipe 102 and the second connecting pipe 103.

[0079] In this embodiment, the valve body 1 includes a valve body body 101, a first connecting pipe 102, and a second connecting pipe 103, which can be connected together to improve the convenience of the three-way valve application. A sealing ring 4 is fitted on at least one of the first connecting pipe 102 and the second connecting pipe 103, which can be easily matched with the counters, thereby improving the sealing performance between the counters.

[0080] In one exemplary embodiment, both the outer peripheral surfaces of the first connecting pipe 102 and the second connecting pipe 103 are provided with multiple protrusions. Taking the protrusions on the first connecting pipe 102 as an example, there are multiple protrusions on the first connecting pipe 102, which are spaced apart along the axial direction of the first connecting pipe 102. Each protrusion is tapered, facilitating the smooth insertion of the first connecting pipe 102 into the matching component. The protrusions on the second connecting pipe 103 serve the same function as those on the first connecting pipe 102, and will not be repeated here.

[0081] In one example, the sealing ring 4 is preferably an FKM (Fluoroelastomer) sealing ring 4, which is a sealing element made of fluororubber and has excellent high temperature resistance, chemical corrosion resistance and aging resistance.

[0082] In one example, the valve body 101 is cylindrical and includes two sub-bodies. The mating surfaces of the two sub-bodies are orthogonal to the axial direction of the valve body 101. The two sub-bodies are interlocked to form a cavity 1011. One sub-bodies is provided with a first connecting pipe 102 and a second connecting pipe 103, and the other sub-bodies are provided with another first connecting pipe 102. The two sub-bodies can be connected by methods such as bonding, welding, or flange connection.

[0083] In some exemplary embodiments, at least one of the surfaces of the valve core 2 and the mounting bracket 3 is covered with an anti-friction coating. It should be noted that covering the surface of the mounting bracket 3 with an anti-friction coating helps reduce the sliding resistance of the mounting bracket 3 relative to the valve body 1, effectively preventing the mounting bracket 3 from getting stuck during sliding. Even if the oil has a certain viscosity, the surface of the mounting bracket 3 is not easily covered with oil, thus ensuring smooth sliding of the valve core 2. Covering the surface of the valve core 2 with an anti-friction coating allows the valve core 2 to be smoothly inserted and removed from the first channel 1021 without easily getting stuck.

[0084] In a preferred example, the friction-reducing coating is a PTFE coating. It should be noted that the PTFE coating (Polytetrafluoroethylene) has an extremely low coefficient of friction (only 0.02), and its surface is extremely smooth and does not easily adhere to substances. This gives its surface excellent sliding performance. At the same time, the PTFE coating has excellent resistance to harsh environments such as acids, alkalis, and solvents, and the PTFE coating has excellent electrical insulation properties, which can effectively isolate current and heat, thereby extending the service life of the valve core 2.

[0085] In some exemplary embodiments, the valve body 1 is made of a conductive material, and the valve core 2 is made of an elastic material. In this embodiment, the conductive material of the valve body 1 provides good conductivity, dissipating static electricity and preventing the risk of fire caused by static electricity. The elastic material of the core, such as silicone or rubber, enhances the sealing effect on the first channel 1021.

[0086] It is worth noting that, regarding the three-way valve in this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still... Figures 1 to 3As shown, it may include, for example, a valve body 1 and a valve core 2 that can slide within a cavity 1011 of the valve body 1. The valve body 1 has first channels 1021 on both sides along a first direction, and a second channel 1031 on the valve body 1. Driven by fluid flowing into the cavity 1011 from one of the first channels, the valve core 2 can slide along the first direction, and a portion of the valve core 2 is inserted into the other first channel 1021, blocking the connection between the first channel 1021 and the cavity 1011, allowing fluid to flow out from the second channel 1031.

[0087] In the preferred embodiment of the three-way valve above, the specific configuration and arrangement of the valve body 1, valve core 2, etc. can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the valve body 1 and valve core 2, etc., can also be referred to the descriptions in the above exemplary embodiments.

[0088] Example 2 The second aspect of this application provides a fuel supply system, including a three-way valve as described in the first aspect of this application, and two fuel tanks respectively connected to two first channels 1021 of the three-way valve, wherein the second channel 1031 of the three-way valve is used to connect to an engine.

[0089] The fuel supply system of this embodiment, by using the three-way valve as described above, can ensure the fuel supply performance to the engine. The valve core 2 can slide with the fluid and partially insert into one of its first channels 1021, which can effectively block the first channel 1021, so that the other first channel 1021 and the second channel 1031 are connected, which can facilitate the use of different fuel tanks for fuel supply.

[0090] This fuel supply system can also solve the problem of excessive pressure in the fuel line when the engine's high-pressure fuel pump is depressurized. For example, under certain operating conditions, if the fuel depressurized by the engine's high-pressure fuel pump flows back to the engine's fuel inlet pipe, it can also flow back to the fuel tank through a three-way valve, thereby preventing excessive fuel pressure from causing the pipeline to rupture and improving the safety and reliability of the fuel supply system.

[0091] Example 3 Meanwhile, an embodiment of the third aspect of this application provides a vehicle equipped with the above-described fuel supply system.

[0092] The vehicle described in this application, by applying the fuel supply system in the second aspect of this application, can stably and safely supply fuel to the vehicle, thereby improving the safety of vehicle operation.

[0093] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A three-way valve, characterized in that: Includes a valve body (1) and a valve core (2) that can slide within a cavity (1011) of the valve body (1). The valve body (1) is provided with a first channel (1021) on both sides along the first direction, and the valve body (1) is provided with a second channel (1031). Driven by the fluid flowing into the cavity (1011) from one of the first passages, the valve core (2) is able to slide along the first direction, and a portion of the valve core (2) is inserted into another of the first channels (1021) and blocks the connection between the first channel (1021) and the cavity (1011), so that the fluid can flow out from the second channel (1031).

2. The three-way valve according to claim 1, characterized in that: The valve core (2) is slidably disposed in the cavity (1011) via the mounting bracket (3); The mounting bracket (3) includes a connector (301) and a fixing member (302) respectively connected to both sides of the connector (301); The valve core (2) is connected to the fixing members (302) on both sides respectively.

3. The three-way valve according to claim 2, characterized in that: Each of the aforementioned fasteners (302) includes a fixing plate that slides axially along the cavity (1011), and each fixing plate is provided with an opening (3021) extending through itself; and / or, The connector (301) includes a plurality of connecting rods, which are spaced apart around the axial direction of the cavity (1011). Each connecting rod extends along the axial direction of the cavity (1011), and each connecting rod is connected at both ends to the fixing members (302) on both sides.

4. The three-way valve according to claim 2, characterized in that: The outer surface of the valve core (2) is provided with a groove (201), and the fixing member (302) is partially embedded in the groove (201).

5. The three-way valve according to claim 2, characterized in that: The valve core (2) has an insertion part (202) located on both sides of itself, and a portion of each insertion part (202) can be inserted into the first channel (1021) on the corresponding side; Each of the insertion portions (202) is conical, and the diameter of one end of each insertion portion (202) inserted into the first channel (1021) is smaller than the diameter of the other end of the insertion portion (202).

6. The three-way valve according to claim 5, characterized in that: The insertion portions (202) on both sides are connected by connecting portions (203). From the middle of the connecting portion (203) along the first direction to near each insertion portion (202), the diameter of the connecting portion (203) gradually increases.

7. The three-way valve according to claim 2, characterized in that: The valve body (1) includes a valve body body (101) with the cavity (1011) formed thereon, a first connecting pipe (102) with each of the first channels (1021) formed thereon, and a second connecting pipe (103) with the second channel (1031) formed thereon. The valve body (101), each of the first connecting pipes (102) and the second connecting pipes (103) are connected together, and a sealing ring (4) is fitted on the first connecting pipe (102) and / or the second connecting pipe (103).

8. The three-way valve according to any one of claims 2-7, characterized in that: At least one of the valve core (2) and the mounting bracket (3) is covered with a friction-reducing coating; and / or, The valve body (1) is made of conductive material, and the valve core (2) is made of elastic material.

9. An oil supply system, characterized in that: The three-way valve includes any one of claims 1 to 8, and further includes two oil tanks respectively connected to the two first channels (1021) of the three-way valve, wherein the second channel (1031) of the three-way valve is used to connect to the engine.

10. A vehicle, characterized in that: The vehicle is equipped with the fuel supply system as described in claim 9.

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