Integrated oil tank multifunctional valve

Abstract

The utility model provides an integrated oil tank multifunctional valve, which relates to the technical field of automobile parts, and comprises a mounting piece, a shell, a driving assembly, a first valve piece, a second valve piece, a first elastic piece and a second elastic piece, and the mounting piece is an oil tank sealing piece and is used for being mounted on an oil tank and sealing a corresponding opening of the oil tank; the shell and the mounting piece are integrally fixed, and an inner cavity, an air channel and a valve port communicating the inner cavity with the air channel are formed in the shell; the driving assembly is arranged in the inner cavity and comprises a movable part capable of moving in the inner cavity along a straight line. According to the integrated oil tank multifunctional valve, the control part is integrally arranged, the whole valve body is integrally installed on the oil tank sealing piece, the occupied space of the valve body is reduced, independent installation of the valve body is not needed, meanwhile, under the arrangement, a valve body connector and the valve body do not need to be perpendicularly arranged outside the oil tank, the longitudinal space is reduced, the chassis integration degree can be effectively improved, and the cost is reduced. The capacity of the oil tank is increased under the same design space.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to an integrated fuel tank multifunctional valve. Background Art

[0002] The fuel tank isolation valve is a critical component in a vehicle's fuel system, primarily responsible for managing and controlling pressure and volatile gases within the fuel tank. Its main components include the valve body, valve core, spring, seals, and connectors. The valve body is typically made of corrosion-resistant materials to resist fuel corrosion; the valve core opens and closes the valve; the spring provides the necessary force to close the valve; the seals ensure a tight seal and prevent fuel leaks; and the connectors connect to the fuel tank and other piping systems. The fuel tank isolation valve regulates fuel tank pressure by controlling the position of the valve core. Normally, the valve is closed, preventing fuel and volatile gases from escaping. When the pressure in the fuel tank reaches a certain level, the valve automatically opens, releasing excess gas to maintain tank pressure equilibrium. Furthermore, in exceptional circumstances, such as a vehicle stall or collision, the isolation valve can automatically close to prevent fuel leaks and potential fire risks. In a vehicle system, the fuel tank isolation valve is typically attached to the top, side, or external piping of the fuel tank and is connected to the evaporative control system. It works in conjunction with components such as the fuel pump, fuel filter, and fuel injection system to ensure efficient fuel system operation and environmental protection. By effectively managing the emission of fuel vapor, the fuel tank isolation valve not only improves vehicle safety but also complies with strict environmental regulations.

[0003] Existing fuel tank isolation valves usually require two or more mounting feet, which are then fixed to the vehicle frame through a bracket. While being independently set, an interface at a 90-degree angle to the valve body is also required on the outside, and then the carbon canister, fuel tank and other components are connected through the interface and pipelines. This setting is not conducive to the vehicle's spatial layout, especially for some hybrid models. In order to make room for chassis batteries, the chassis space is extremely limited, and the fuel tank is gradually becoming flatter and lower. The independently set isolation valve will greatly affect the capacity of the fuel tank and the integration of the vehicle chassis. Utility Model Content

[0004] In view of this, the utility model proposes an integrated fuel tank multifunctional valve, which integrates the control components and installs the entire valve body on the fuel tank sealing part, thereby reducing the space occupied by the valve body and eliminating the need for independent installation. At the same time, under this setting, the valve body interface does not need to be set at a 90-degree angle to the valve body outside the fuel tank, which can effectively improve the chassis integration and increase the fuel tank capacity under the same design space.

[0005] The technical solution of the present invention is implemented as follows: The present invention provides an integrated fuel tank multifunctional valve, including a mounting member, a housing, a drive assembly, a first valve member, a second valve member, a first elastic member and a second elastic member, wherein:

[0006] The mounting piece is a fuel tank sealing piece, which is used to be mounted on the fuel tank and seal the corresponding opening of the fuel tank;

[0007] The housing is fixed to the mounting piece in an integral manner, and the housing is provided with an inner cavity, an air passage, and a valve port connecting the inner cavity and the air passage;

[0008] The drive assembly is arranged in the inner cavity, and the drive assembly includes a movable portion that can move linearly in the inner cavity, and the movable direction of the movable portion is parallel to the plane of the oil tank where the mounting member is arranged;

[0009] The first valve member is arranged on the movable portion and inserted into the valve port;

[0010] The second valve member is disposed outside the first valve member and contacts the first valve member and the outside of the valve port to seal the valve port;

[0011] The first elastic member is disposed in the inner cavity, and one end of the first elastic member is connected to the second valve member to support the second valve member and contact the outside of the valve port;

[0012] Two ends of the second elastic member are respectively arranged on the movable portion and the second valve member, so that the first valve member and the second valve member are tightly fitted.

[0013] On the basis of the above technical solution, preferably, the second valve member includes an annular sheet and a sealing member, wherein:

[0014] The annular sheet is arranged on the first elastic member and the second elastic member;

[0015] The sealing member is arranged on the annular sheet and is located between the first valve member and the annular sheet. The sealing member includes two concentrically arranged sealing edges. The inner sealing edge and the outer sealing edge respectively contact the first valve member and the outer side wall of the valve port to close the valve port.

[0016] On the basis of the above technical solution, preferably, it also includes a connecting column, one end of which is arranged on the movable part, and the other end is fixed to the first valve member, and the second elastic member is coaxially arranged with the first elastic member and is sequentially sleeved on the outside of the connecting column.

[0017] Based on the above technical solution, preferably, the drive assembly includes a protective shell, which is cylindrical and fixed in the outer shell. The movable part is arranged in the protective shell, and the inner diameter of the air flow channel is formed between the protective shell and the inner cavity of the protective shell to form an air flow channel in the inner cavity.

[0018] On the basis of the above technical scheme, preferably, the shell is horizontally arranged on the mounting member and embedded in the mounting member to make the air passage communicate with the inside of the oil tank.

[0019] On the basis of the above technical scheme, preferably, the oil level sealing mechanism is integrally arranged on the shell and communicates with the air passage, and the oil level sealing mechanism is used to connect or block the air passage and the inside of the oil tank.

[0020] Further preferably, the oil level sealing mechanism comprises an oil level shell, a floating member and a third elastic member, wherein,

[0021] The oil level shell is integrally fixed with the shell, the shell is provided with a through opening, the through opening communicates with the air passage and the oil level shell, the oil level shell is provided with an oil inlet and an oil filter hole;

[0022] The floating member is movably arranged in the oil level shell, the floating member is in a cylindrical shape and is provided with an opening on one side, the opening side of the floating member is covered outside the oil filter hole, and the floating member can move towards the through opening and block the through opening;

[0023] The two ends of the third elastic member are arranged on the oil level shell and the floating member respectively to push the floating member towards the through opening.

[0024] Further preferably, the oil level shell is provided with a pair of vertical columns, a slide channel is formed between adjacent two vertical columns, the outer side of the floating member is provided with a protruding strip extending into the slide channel to guide the movement of the floating member.

[0025] Further preferably, the oil level sealing mechanism further comprises a sealing gasket, the top of the floating member is provided with a protruding block, the sealing gasket is arranged on the protruding block, the diameter of the protruding block is smaller than the inner diameter of the through opening, and the outer diameter of the sealing gasket is larger than the inner diameter of the through opening.

[0026] On the basis of the above technical scheme, preferably, the shell is further provided with an internal valve body interface and an external valve body interface, the internal valve body interface and the external valve body interface both communicate with the air passage, and the internal valve body interface and the external valve body interface are respectively located on the two sides of the mounting member.

[0027] The integrated oil tank multifunctional valve of the utility model has the following beneficial effects compared with the prior art:

[0028] (1) By combining the first valve component and the second valve component and connecting the first valve component and the second valve component through the stacked first elastic component and the second elastic component, the second valve component cooperates with the first valve component to operate during the passive opening and closing process to achieve positive pressure air release and negative pressure air replenishment, effectively improving the integration of the control components and reducing the overall space occupied by the valve body. In addition, the entire valve body is integrated and installed on the oil tank sealing component, reducing the space occupied by the valve body and eliminating the need for independent installation. At the same time, under this setting, the valve body interface does not need to be set at a 90-degree angle with the valve body outside the oil tank, which can effectively improve the chassis integration and increase the oil tank capacity under the same design space;

[0029] (2) The movable portion of the drive assembly is set to be parallel to the plane of the fuel tank, and the movable direction of the movable portion is set to be parallel to the plane of the fuel tank, so that the maximum length direction of the shell is parallel to the outer surface of the fuel tank, avoiding the shell being set vertically on the outside of the fuel tank in the length direction. The shell is set horizontally on the mounting member and embedded in the mounting member so that the air passage is connected to the inside of the fuel tank, which can maximize the reduction of the installation space occupied by the shell and is more conducive to the spatial design layout of the vehicle chassis;

[0030] (3) The air passage is connected to the fuel tank through the oil level sealing mechanism. When fuel enters the inner cavity of the float through the oil inlet, the air inside the float cannot be discharged. Since the air density is lower than that of the fuel, the air will push the float upward as the oil level rises until the float closes the opening. At this time, the interior of the fuel tank is closed and no more fuel can be added to the tank, thereby achieving refueling protection and a high degree of interface integration. In addition, there is no need to set up a separate FLVV valve in the fuel tank, which reduces the fuel tank assembly procedure and is more conducive to the design of the fuel tank space layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a three-dimensional diagram of the integrated fuel tank multifunctional valve of the present utility model;

[0033] Figure 2 This is a side view of the integrated fuel tank multifunctional valve of the present utility model;

[0034] Figure 3 for Figure 2 The sectional view at AA in the figure;

[0035] Figure 4 forFigure 3 A magnified schematic diagram of the structure at point B in FIG;

[0036] Figure 5 This is a partial cross-sectional view of the integrated fuel tank multifunctional valve of the present utility model;

[0037] Figure 6 This is a schematic diagram of the internal structure of the oil level sealing mechanism of the integrated fuel tank multifunctional valve of the present utility model;

[0038] Figure 7 This is a schematic diagram of the connection between the drive assembly and the first valve component of the integrated fuel tank multifunctional valve of the present utility model;

[0039] Figure 8 This is a three-dimensional view of the integrated fuel tank multifunctional valve of the present invention from another perspective. DETAILED DESCRIPTION

[0040] The following will be combined with 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 are within the scope of protection of the present invention.

[0041] like Figures 1-8 As shown, the integrated fuel tank multifunctional valve of the present invention includes a mounting member 1 , a housing 2 , a drive assembly 3 , a first valve member 4 , a second valve member 5 , a first elastic member 6 and a second elastic member 7 .

[0042] The mounting part 1 is a fuel tank sealing part, which is used to be installed on the fuel tank and seal the corresponding opening of the fuel tank. Specifically, the mounting part 1 can be used as a flange. A limit ring is set on one side of the mounting part 1 for aligning with the fuel tank opening and inserting into the fuel tank. The other side is a flat setting for integrating external components of the fuel tank. The material of the mounting part 1 can be plastic or metal, preferably the same metal material as the fuel tank. When the mounting part 1 is fixed to the fuel tank, a sealing ring can be set to seal the edge part.

[0043] The shell 2 is fixed to the mounting member 1 as a whole. The shell 2 is provided with an inner cavity 201, an air passage 202 and a valve port connecting the inner cavity 201 and the air passage 202. In this embodiment, the shell 2 can be divided into three parts, namely the main shell, the tail shell and the built-in shell. The inner cavity 201 and the air passage 202 are both provided on the main shell. The inner cavity 201 of the main shell is cylindrical and open on one side, and an air passage 202 extending from the side to the bottom is provided on the other side. The main shell is embedded in the mounting member 1 and fixed thereto. A sealing ring is provided at the connection to ensure airtightness. The tail shell is fixed to The open side of the main shell is convenient for installation after the internal components of the main shell are assembled, and it is also convenient for injection molding of each part of the shell. An interface connecting the inner cavity 201 is provided on the tail shell, which is used to connect the carbon canister. The built-in shell is located on the side where the mounting part 1 is inserted into the fuel tank. It is used to close the air duct 202 to form a complete air duct 202, that is, part of the air duct is located in the fuel tank, which will not cause problems such as vertical interfaces and occupy additional vehicle chassis space. This setting is for assembling the shells after injection molding and separately integrating the components that need to be installed.

[0044] The driving component 3 is arranged in the inner cavity 201, and the driving component 3 includes a movable part 31 that can move linearly in the inner cavity 201. The movable direction of the movable part 31 is parallel to the oil tank plane where the mounting part 1 is set. In this embodiment, the driving component 3 uses an electromagnetic assembly, in which the movable part 31 is the movable axis of the electromagnetic assembly. The electromagnetic assembly is horizontally arranged in the embedded 201 of the outer shell 2. The electromagnetic assembly also includes an electromagnetic coil, which controls the lateral movement of the movable part 31 by turning on and off the power of the electromagnetic coil. Since the movable part 31 of the electromagnetic assembly is long and has a certain movable stroke, the length direction of the movable part 31 is the movable direction of the driving component 3. In the outer shell 2, the driving component 3 occupies the largest space. Therefore, the setting of the outer shell 2 is mainly determined by the driving component 3. In this embodiment, the length direction and movable direction of the movable part 31 are set to be parallel to the oil tank plane, so that the largest part thereof can be fully close to and connected to the oil tank.

[0045] The first valve member 4 is provided on the movable portion 31 and inserted into the valve port. The valve port is circular and the first valve member 4 is disc-shaped. In the closed state, that is, when the pressure inside the fuel tank is balanced with or has a small difference with the external pressure, the first valve member 4 is located in the valve port. The outer diameter of the first valve member 4 is smaller than the outer diameter of the valve port. When the fuel tank is in a negative pressure state and air needs to be added from the outside, the first valve member 4 will move toward the air passage 202, thereby leaving the valve port, allowing external air to enter the fuel tank to balance the internal pressure of the fuel tank. Conversely, when the fuel tank needs to be exhausted, the first valve member 4 will move toward the inner cavity 201, thereby leaving the valve port. It should be noted that the operation of the first valve member 4 described here is under the condition of passive pressure balance of the fuel tank. The movable portion 31 connected to the first valve member 4 can drive the first valve member 4 to move toward the inner cavity 201 when actively regulated, thereby actively opening the valve port and allowing air to flow through the valve port.

[0046] It should be noted that the driving assembly 3 can only actively drive the movable portion 31 to move in a direction away from the airway 202 , but cannot drive the movable portion 31 to move toward the airway 202 .

[0047] However, there is a problem in closing the valve port by only providing the first valve component 4, namely, how to ensure that the first valve component 4 is accurately located in the valve port when the pressure is balanced. Therefore, in this embodiment, the valve port is not sealed by the first valve component 4, but a second valve component 5 is also provided. The second valve component 5 is provided on the outside of the first valve component 4 and contacts the first valve component 4 and the outside of the valve port to cooperate with the first valve component 4 to seal the valve port. During the passive opening and closing process, the second valve component 5 will cooperate with the first valve component 4 to achieve positive pressure degassing and negative pressure air replenishment. Specifically, when the positive pressure in the fuel tank needs to be exhausted, the gas will press the second valve component 5 and the first valve component 4 to move toward the inner cavity 201, thereby opening the valve port. When the negative pressure in the fuel tank needs to be replenished, the first valve component 4 alone moves toward the air passage 202 to open the valve port.

[0048] The first elastic member 6 is arranged in the inner cavity 201, and one end is connected to the second valve member 5 to force the second valve member 5 to contact the outside of the valve port. The other end of the first elastic member 6 is arranged on the drive assembly 3. The first elastic member 6 is preferably a spring, which squeezes the second valve member 5 to close the valve port. When the second valve member 5 moves toward the inner cavity 201, the first elastic member 6 will be compressed and deformed. When the second valve member 5 is not under force, the first elastic member 6 will restore the deformation and push the second valve member 5 to move back to the outside of the valve port. It should be noted that the force of the first elastic member 6 squeezing the second valve member 5 will directly determine the discharge pressure value in the oil tank, that is, when the pressure in the oil tank exceeds the discharge pressure value, the internal gas will be passively discharged to the outside.

[0049] The two ends of the second elastic member 7 are respectively arranged on the movable portion 31 and the second valve member 5, so that the first valve member 4 and the second valve member 5 are tightly fitted. The second elastic member 7 is preferably a spring, which is mainly used to connect the second valve member 5 and the first valve member 4 to form a secondary opening and closing structure of the first valve member 4 on the second valve member 5. In this embodiment, the first elastic member 6 limits the position of the second valve member 5 so that it is close to the outside of the valve port. On the basis of the second valve member 5, the second elastic member 7 cooperates with the first valve member 4 to clamp the second valve member 5 from both sides, thereby limiting the position of the first valve member 4.

[0050] In this embodiment, the free height of the first elastic member 6 is 23.5 mm, the effective number of turns is 6, the action height is 9 mm, and the pressure when closed is 5.7 N. The free height of the second elastic member 7 is 21.5 mm, the effective number of turns is 7, the action height is 5.5 mm, and the pressure when closed is 1.7 N. The deflation, suction and replenishment strokes of the first valve member 4 are both 4 mm.

[0051] As a preferred embodiment, the second valve member 5 includes an annular sheet 51 and a sealing member 52. The annular sheet 51 is arranged on the first elastic member 6 and the second elastic member 7. The sealing member 52 is arranged on the annular sheet 51 and is located between the first valve member 4 and the annular sheet 51. The sealing member 52 includes two concentrically arranged sealing edges, the inner sealing edge and the outer sealing edge respectively contact the first valve member 4 and the outer side wall of the valve port to close the valve port.

[0052] The annular sheet 51 is provided with an opening, through which the first valve member 4 can be connected to the movable part 31. An annular protrusion is provided on the outside of the opening, and the second elastic member 7 and the second elastic member 6 are respectively installed through the inner and outer sides of the annular protrusion. It should be noted that the outer diameter of the annular sheet 51 must be larger than the inner diameter of the valve port.

[0053] In order to connect the first valve member 4 and the movable part 31, a connecting column 8 is further provided. One end of the connecting column 8 is provided on the movable part 31, and the other end is fixed to the first valve member 4. The second elastic member 7 is coaxially arranged with the first elastic member 6 and is sequentially sleeved on the outside of the connecting column 8. Specifically, the connecting column 8 and the first valve member 4 are integrally injection-molded. A lateral slot is provided at the end of the connecting column 8, and a U-shaped structure is also provided. The end of the movable part 31 is inserted into the slot and limited by the U-shaped structure to realize the connection between the connecting column 8 and the movable part 31. The connection is radial, so when the movable part 31 moves axially, it will not be separated from the connecting column 8.

[0054] In addition, in terms of spatial layout, in order to further optimize the volume of the valve component, the second elastic component 7 is sleeved onto the outside of the connecting column 8, and then the first elastic component 6 is sleeved onto the outside of the second elastic component 7 to form a coaxial multi-layer stacked structure, thereby avoiding the first elastic component 6 and the second elastic component 7 being arranged on both sides of the second valve component 5, which would cause the entire length of the valve body to increase.

[0055] As a preferred embodiment, the drive assembly 3 includes a protective shell 32, which is cylindrical and fixed in the outer shell 2. The movable part 31 is arranged in the protective shell 32. The outer diameter of the protective shell 32 is smaller than the inner diameter of the outer shell 2 to form an air flow channel in the inner cavity 201.

[0056] A base is also provided inside the outer shell 2. Specifically, the base is provided in the inner cavity 201. The base includes at least two bosses distributed around the outside of the second valve member 5. The protective shell 32 is fixed on the base. At the same time, a channel for airflow is formed between the bosses, that is, the airflow channel is connected to the valve port, so that when the carbon canister is connected to the interface on the tail shell, it can be connected to the valve port.

[0057] In this embodiment, since the shell can only be set to cover the outside of the drive component 3, and the drive component has a movable part 31 and a certain stroke, its length direction will directly determine the size of the shell 2. In order to reduce the space occupied by the entire valve body, the shell 2 is set horizontally on the mounting part 1 and embedded in the mounting part 1 so that the air duct 202 is connected to the inside of the fuel tank, thereby maximizing the reduction of the installation space occupied by the shell 2, which is more conducive to the space design layout of the vehicle chassis.

[0058] In the fuel tank, a mechanical FLVV valve is usually required to be separately set to control refueling, but this setting will result in a large number of components being separately set and installed on the fuel tank, which is inconvenient to repair and maintain. Therefore, in this embodiment, an oil level sealing mechanism 9 is also integrated. The oil level sealing mechanism 9 is integrated on the outer shell 2 and connected to the air passage 202. The oil level sealing mechanism 9 is used to connect or block the connection between the air passage 202 and the inside of the fuel tank. By connecting the air passage 202 with the fuel tank through the set oil level sealing mechanism 9, a high degree of interface integration can be achieved, and there is no need to separately set an FLVV valve in the fuel tank, which reduces the fuel tank assembly procedure and is more conducive to the design of the fuel tank space layout.

[0059] It should be noted that the oil level sealing mechanism 9 mainly plays a mechanical auxiliary refueling restriction function. During the normal refueling process, refueling is mainly completed by the valve body, and the refueling restriction mechanism will not interfere with the active control of the valve body. However, when the oil level sensor or other sensors fail, or the signal transmission is interrupted, it is difficult for the valve body to actively control according to the electrical signal. At this time, the oil level sealing mechanism 9 is a further guarantee for the valve body function, realizing mechanical refueling closure to prevent overflow after the fuel is full.

[0060] Specifically, the oil level sealing mechanism 9 includes an oil level shell 91, a floating member 92 and a third elastic member 93. The oil level shell 91 is fixed integrally with the outer shell 2. A through opening is provided on the outer shell 2, and the through opening connects the air duct 202 and the oil level shell 91. The oil level shell 91 is provided with an oil inlet 911 and an oil filter hole 912. The floating member 92 is movably arranged in the oil level shell 91. The floating member 92 is cylindrical and open on one side. The open side cover of the floating member 92 is arranged on the outside of the oil filter hole 912. The floating member 92 can move toward the through opening and block the through opening. The two ends of the third elastic member 93 are respectively provided on the oil level shell 91 and the floating member 92, and are used to push the floating member 92 toward the through opening.

[0061] The oil level shell 91 includes two parts, the upper part and the built-in shell of the outer shell 2, and the bottom of the upper part is open, the lower part is inserted into the upper part and fixed, and the floating part 92 is a metal part or a plastic part. It is a hollow cylinder with one side opening toward the lower part of the oil level shell 91 and the other side closed, forming a buoyancy chamber with one side opening. The oil inlet 911 is opened in the upper part of the oil level shell 91, and the oil filter hole 912 is set on the lower part of the oil level shell 91. Specifically, four oil filter holes 912 are set, and all are located on the open side of the floating part 92. When the fuel enters the oil level shell 91 through the oil inlet 911, the air inside the floating part 92 cannot be discharged, and the air density is lower than the fuel density. As the oil level rises, it will push the floating part 92 to move upward until the floating part 92 closes the opening. At this time, the inside of the fuel tank is closed and cannot be discharged. Continue to add oil to the fuel tank. The third elastic member 93 is preferably a spring. The third elastic member 93 is arranged inside the floating member 92, and a protrusion for fixing the end of the third elastic member 93 is provided on the lower part of the oil level shell 91. The third elastic member 93 has an elastic force to support the floating member 92, which is equivalent to having a pre-upward force, and cooperates with the buoyancy to float the floating member 92 easily and sensitively. If the third elastic member 93 is not used, floating only by oil is very slow, and the force is too small and not sensitive. In addition, another function of the third elastic member 93 is that when the vehicle tilts, the floating member 92 slides quickly under the action of the third elastic member 93 to block the opening to prevent oil from accidentally entering the main valve body. The third elastic member 93 can be designed to adjust the elastic force at the tilting angle. The oil filter hole 912 is used to allow the oil at the bottom of the floating member 92 to discharge from the oil level shell 91 when the floating member 92 moves downward.

[0062] As a preferred embodiment, a pair of columns 913 are provided in the oil level housing 91 , and a slideway is formed between two adjacent columns 913 . A convex strip extending into the slideway is provided on the outer side of the floating member 92 to guide the movement of the floating member 92 .

[0063] In order to prevent the floating part 92 from being unable to accurately block the opening during the floating process, a column 913 and a convex strip structure on the outside of the floating part 92 are set to guide the moving direction of the floating part 92, avoid its deviation during the movement, cause its own function to be affected, and improve the stability of the structural part.

[0064] In order to further improve the reliability of the floating member 92 when sealing the opening, the oil level sealing mechanism 9 also includes a sealing gasket 94. A protrusion is provided on the top of the floating member 92, and the sealing gasket 94 is provided on the protrusion. The diameter of the protrusion is smaller than the inner diameter of the opening, and the outer diameter of the sealing gasket 94 is larger than the inner diameter of the opening. When sealing the opening, the sealing gasket 94 produces elastic deformation, thereby further improving the sealing effect.

[0065] As a further integrated setting of the valve body, the shell 2 is also provided with a built-in valve body interface 203 and an external valve body interface 204. The built-in valve body interface 203 and the external valve body interface 204 are both connected to the airway 202, and the built-in valve body interface 203 and the external valve body interface 204 are respectively located on both sides of the mounting part 1.

[0066] The built-in valve body interface 203 is connected to the ROV replenishing valve and other valve components in the fuel tank. When the ROV replenishing valve is connected, the vehicle can be protected from rollover to prevent fuel leakage to the outside and reduce the risk of fire. Or when the vehicle is tilted, rolled over or violently vibrated, the valve will close quickly to avoid fuel leakage.

[0067] The external valve body interface 204 is used to detect the leakage of the LCO refueling pipe during OBD diagnosis. When the OBD diagnosis command turns on the electromagnet, the circulation pipe can be connected for diagnosis.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated fuel tank multifunctional valve, characterized by: It comprises a mounting member (1), a housing (2), a driving assembly (3), a first valve member (4), a second valve member (5), a first elastic member (6) and a second elastic member (7), wherein: The mounting member (1) is a fuel tank sealing member, which is used to be mounted on the fuel tank and seal the corresponding opening of the fuel tank; The housing (2) is fixed to the mounting member (1) in an integral manner, and the housing (2) is provided with an inner cavity (201), an air passage (202), and a valve port communicating the inner cavity (201) and the air passage (202); The drive assembly (3) is arranged in the inner cavity (201), and the drive assembly (3) includes a movable portion (31) that can move linearly in the inner cavity (201), and the movable direction of the movable portion (31) is parallel to the oil tank plane on which the mounting member (1) is arranged; The first valve member (4) is arranged on the movable portion (31) and inserted into the valve port; The second valve member (5) is arranged outside the first valve member (4) and contacts the first valve member (4) and the outside of the valve port to seal the valve port; The first elastic member (6) is disposed in the inner cavity (201), and one end of the first elastic member is connected to the second valve member (5) to support the second valve member (5) to contact the outside of the valve port; The two ends of the second elastic member (7) are respectively arranged on the movable portion (31) and the second valve member (5), so that the first valve member (4) and the second valve member (5) are tightly fitted.

2. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: The second valve member (5) comprises an annular plate (51), and the annular plate (51) is arranged on the first elastic member (6) and the second elastic member (7).

3. The integrated fuel tank multifunctional valve according to claim 2, characterized in that: The second valve member (5) further comprises a sealing member (52), which is arranged on the annular plate (51) and located between the first valve member (4) and the annular plate (51), and the sealing member (52) comprises two concentrically arranged sealing edges, wherein the inner sealing edge and the outer sealing edge respectively contact the first valve member (4) and the outer side wall of the valve port to seal the valve port.

4. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: The driving assembly (3) includes a protective shell (32), the protective shell (32) is cylindrical and fixed in the outer shell (2), the movable part (31) is arranged in the protective shell (32), and an air flow channel is formed between the protective shell (32) and the inner cavity (201).

5. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: The housing (2) is disposed horizontally on the mounting member (1) and is embedded in the mounting member (1) so that the air passage (202) is connected to the interior of the oil tank.

6. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: It also includes an oil level sealing mechanism (9), which is integrated on the housing (2) and connected to the air passage (202). The oil level sealing mechanism (9) is used to connect or block the connection between the air passage (202) and the interior of the oil tank.

7. The integrated fuel tank multifunctional valve according to claim 6, characterized in that: The oil level sealing mechanism (9) comprises an oil level housing (91), a floating member (92) and a third elastic member (93), wherein: The oil level housing (91) is fixed to the outer housing (2) in an integral manner. The outer housing (2) is provided with a through opening, the through opening communicating with the air passage (202) and the oil level housing (91). The oil level housing (91) is provided with an oil inlet (911) and an oil filter hole (912). A floating member (92) is movably arranged in the oil level housing (91). The floating member (92) is cylindrical and has an opening on one side. The opening side cover of the floating member (92) is arranged outside the oil filter hole (912). The floating member (92) can move toward the through port and block the through port. Two ends of the third elastic member (93) are respectively arranged on the oil level housing (91) and the floating member (92), and are used to push the floating member (92) toward the through port.

8. The integrated fuel tank multifunctional valve according to claim 7, characterized in that: A pair of columns (913) are provided in the oil level housing (91), and a slideway is formed between two adjacent columns (913). A convex strip extending into the slideway is provided on the outer side of the floating member (92) to guide the movement of the floating member (92).

9. The integrated fuel tank multifunctional valve according to claim 7, characterized in that: The oil level sealing mechanism (9) further comprises a sealing gasket (94). A protrusion is provided on the top of the floating member (92). The sealing gasket (94) is provided on the protrusion. The diameter of the protrusion is smaller than the inner diameter of the through-hole, and the outer diameter of the sealing gasket (94) is larger than the inner diameter of the through-hole.

10. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: The housing (2) is further provided with a built-in valve body interface (203) and an external valve body interface (204), both of which are in communication with the airway (202), and the built-in valve body interface (203) and the external valve body interface (204) are respectively located on both sides of the mounting member (1).

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