Integrated oil tank multifunctional valve

Abstract

The utility model provides an integrated oil tank multifunctional valve, which relates to the technical field of automobile accessories, and comprises a shell, a valve core and a driving part, the shell is horizontally fixed on an oil tank, one side of the shell extends into the oil tank, and the shell is provided with an inner cavity, a valve port, a connecting cavity and an external interface. According to the integrated oil tank multifunctional valve, the valve body is directly integrated on the oil tank, and the connecting cavity is formed in the shell of the valve body to extend into the oil tank, so that the oil tank is communicated with internal devices of the oil tank, independent arrangement of the valve body and an oil tank pipeline joint is avoided, the assembly steps are reduced, and the assembly difficulty is reduced; meanwhile, an oil tank connecting joint perpendicular to the valve body extends into the oil tank, the situation that too much chassis space is occupied is avoided, a joint connected with a carbon tank and a valve port are arranged at the two ends of the shell respectively, and therefore the space occupied by installation of the valve body is further reduced; and the space layout of the chassis or the capacity improvement of the oil tank is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, especially to a multifunctional valve of integrated oil tank. BACKGROUND

[0002] An oil tank isolation valve is a critical component of a vehicle's fuel system, primarily used to manage and control the pressure and volatile gases within the fuel tank. Its main components include a valve body, a valve core, a spring, a seal, and a connection interface. The valve body is usually made of corrosion-resistant materials to resist the erosion of fuel; the valve core is responsible for opening and closing the valve; the spring provides the necessary force to close the valve; the seal ensures the system's tightness, preventing fuel leakage; and the connection interface is used to connect with the fuel tank and other pipeline systems. In terms of working principle, the oil tank isolation valve adjusts the pressure within the fuel tank by controlling the position of the valve core. Normally, the valve is closed to prevent fuel and gas from leaking out. When the pressure in the fuel tank reaches a certain level, the valve will automatically open to release excess gas, maintaining the pressure balance of the fuel tank. In addition, in special situations such as vehicle shutdown or collision, the isolation valve can automatically close to prevent fuel leakage and potential fire risks. In the vehicle system, the oil tank isolation valve is usually connected to the top, side, or external pipeline of the fuel tank and connected to the fuel vapor control system. It cooperates with components such as fuel pumps, fuel filters, and fuel injection systems to ensure efficient operation of the fuel system and environmental protection. By effectively managing fuel vapor emissions, the oil tank isolation valve not only improves vehicle safety but also meets strict environmental regulations.

[0003] In the prior art, the oil tank isolation valve is usually set independently, such as the oil tank isolation valve with authorization announcement number CN114087371B, which is provided with an oil tank pipeline joint and a carbon tank pipeline joint. The oil tank pipeline joint and the carbon tank pipeline joint are connected to the oil tank and the carbon tank through pipelines. On the oil tank, corresponding joints are also provided to connect with the oil tank pipeline joint, resulting in the need to first integrate at least one joint when assembling the oil tank, then install the oil tank isolation valve on the vehicle frame or the oil tank, and finally connect them through pipelines. This kind of setting requires separate installation of the isolation valve and the oil tank pipeline joint, resulting in complicated assembly steps and complex processes. SUMMARY

[0004] In view of this, the utility model proposes an integrated fuel tank multifunctional valve, which integrates the valve body directly on the fuel tank and provides a connecting cavity on the outer shell of the valve body to extend into the interior of the fuel tank, thereby connecting the fuel tank and the internal components of the fuel tank, avoiding the separate arrangement of the valve body and the fuel tank pipeline joints, thereby reducing the assembly steps and reducing the difficulty of assembly. At the same time, the fuel tank connection joint perpendicular to the valve body itself is changed to extend into the interior of the fuel tank, avoiding occupying too much chassis space. As for the joint connecting the carbon canister, it and the valve port are respectively arranged on the two ends of the shell to further reduce the space required for the valve body installation, which is beneficial to the chassis space layout or the increase of the fuel tank capacity.

[0005] The technical solution of the present invention is implemented as follows: The present invention provides an integrated fuel tank multifunctional valve, comprising a housing, a valve core and a drive unit, wherein:

[0006] The housing is horizontally fixed on the fuel tank, and one side extends into the fuel tank. The housing is provided with an inner cavity, a valve port, a connecting cavity and an external port. The inner cavity is provided outside the fuel tank, the valve port and the external port are respectively located at two ends of the inner cavity and are connected through the inner cavity. The connecting cavity extends from the outside of the fuel tank to the inside of the fuel tank and connects the valve port and the fuel tank.

[0007] The valve core is arranged in the inner cavity, and the valve core can close and open the valve port to change the communication state between the inner cavity and the connecting cavity;

[0008] The driving part is fixed in the housing and is in transmission connection with the valve core, and is used for driving the valve core to leave the valve port.

[0009] On the basis of the above technical solution, preferably, it further includes a fuel tank flange, the shell and the fuel tank flange are fixed in one piece, and the fuel tank flange is a fuel tank sealing member for sealing the corresponding opening of the fuel tank.

[0010] On the basis of the above technical solution, preferably, the driving part includes a movable end, and the movable end can be moved in the inner cavity along a direction parallel to the valve port, and the movable end is transmission-connected to the valve core to drive the valve core to move synchronously.

[0011] Further preferably, the driving part further includes a protective shell, the protective shell is fixed in the inner cavity, the movable end is arranged on the protective shell, and an air flow channel is formed between the protective shell and the inner wall of the shell to connect the valve port and the external interface.

[0012] Further preferably, the shell includes a fixing seat arranged in the inner cavity, the fixing seat is fixed to the protective shell, and a through hole for airflow to pass through is opened on the fixing seat.

[0013] More preferably, the number of the fixing seats is set to two, and they are respectively located on both sides of the length direction of the protective shell, one of the fixing seats is arranged on the outside of the valve port, and the valve core extends into the fixing seat.

[0014] On the basis of the above technical solution, preferably, the housing includes a main housing, an end cover and a bottom cover, wherein:

[0015] One end of the main shell is open;

[0016] The end cover is fixed to the main shell and closes the opening of the main shell to form an inner cavity and an outer interface;

[0017] The bottom cover is fixed to the outer side of the main shell and forms a connecting cavity on the main shell.

[0018] Further preferably, the shell further includes a side cover, one side of the main shell is provided with an opening, the side cover is fixed to the main shell and closes the opening to form an inner cavity, and the side cover is provided with an electrical interface.

[0019] The integrated fuel tank multifunctional valve of the utility model has the following beneficial effects compared with the prior art:

[0020] (1) By directly integrating the valve body on the fuel tank and providing a connecting cavity on the outer shell of the valve body to extend into the interior of the fuel tank, the fuel tank and the internal components of the fuel tank are connected, thereby avoiding the need to separately provide the valve body and the fuel tank pipeline joint, thereby reducing the assembly steps and reducing the assembly difficulty. At the same time, the fuel tank connection joint perpendicular to the valve body itself is changed to extend into the interior of the fuel tank, avoiding occupying too much chassis space. As for the joint connecting the carbon canister, it and the valve port are respectively provided on both ends of the shell to further reduce the space required for the valve body installation, thereby facilitating the spatial layout of the chassis or increasing the capacity of the fuel tank;

[0021] (2) The protective shell is cylindrical in shape as a whole, and its outer diameter is smaller than the inner size of the inner cavity, so that an air flow channel for gas circulation is formed between the outer wall of the protective shell and the inner wall of the inner cavity, thereby realizing the connection between the valve port and the external interface, so that when the oil tank exchanges with the outside gas, it can pass horizontally from the inside of the valve body, avoiding the situation where the interfaces outside the two valve bodies can only be set perpendicular to the valve body, which is more conducive to spatial arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 This is a three-dimensional diagram of the integrated fuel tank multifunctional valve of the present utility model;

[0024] Figure 2 This is a side view of the integrated fuel tank multifunctional valve of the present utility model;

[0025] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0026] Figure 4 This is a schematic diagram of the interior of the integrated fuel tank multifunctional valve housing of the present invention. DETAILED DESCRIPTION

[0027] 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.

[0028] like Figures 1-4 As shown, the integrated fuel tank multifunctional valve of the present invention includes a housing 1 , a valve core 2 and a driving part 3 .

[0029] The shell 1 is fixed horizontally on the oil tank, and one side extends into the oil tank. The shell 1 is provided with an inner cavity 101, a valve port 102, a connecting cavity 103 and an external port 104. The inner cavity 101 is provided on the outside of the oil tank, and the valve port 102 and the external port 104 are respectively located at the two ends of the inner cavity 101 and are connected through the inner cavity 101. The connecting cavity 103 extends from the outside of the oil tank to the inside of the oil tank and connects the valve port 102 with the oil tank.

[0030] In this embodiment, the housing 1 is one of the main components of the valve, and its volume is mainly determined by the internal actuators. In existing isolation valves, an electromagnetic assembly is usually used for driving. The electromagnetic assembly is cylindrical as a whole and has a certain length. Therefore, the housing 1 as a whole will form a component with the driving direction of the electromagnetic assembly as the length direction.

[0031] Specifically, the inner cavity 101 in the shell 1 is the main cavity, which is used to install the main components on the valve body. The provided valve port 102 is used as a channel for the actuator to control the opening and closing of the valve body. The provided connecting cavity 103 extends into the fuel tank, and is used to replace the fuel tank connection joint of the fuel tank isolation valve in the prior art. The connection inside the fuel tank is directly made through the connecting cavity 103. The provided external port 104 is used to connect components such as the carbon canister.

[0032] The valve core 2 is arranged in the inner cavity 101, and the valve core 2 can close and open the valve port 102 to change the connection state between the inner cavity 101 and the connecting cavity 103. The valve core 2 needs to realize passive air release and air replenishment, and also realize active air release and air replenishment, so as to have the effect of multi-functional control of the oil tank. Specifically, the valve core 2 may include a first valve plate and a second valve plate. The first valve plate mainly plays the role of passive air replenishment, active air replenishment and active air release. The second valve plate is arranged in conjunction with the first valve plate, and mainly plays the role of passive air release.

[0033] The driving part 3 is fixed in the housing 1 and is connected to the valve core 2 for driving the valve core 2 to leave the valve port 102. In this embodiment, the driving part 3 is selected as an electromagnetic assembly, which connects the first valve plate of the valve core 2 through its axis to perform active opening and closing control of the valve body.

[0034] As a preferred embodiment, a fuel tank flange 4 is further provided, and the housing 1 is fixed integrally with the fuel tank flange 4. The fuel tank flange 4 is a fuel tank sealing member for sealing a corresponding opening of the fuel tank.

[0035] By installing the oil tank flange 4 on the oil tank, the valve body and the oil tank can be assembled in an integrated and detachable manner, which is convenient for the later replacement and maintenance of the valve body. In addition, other components can also be integrated on the oil tank flange 4, such as a mechanical refueling anti-overflow mechanism.

[0036] In this embodiment, the driving part 3 is selected as an electromagnetic assembly, which has a movable central axis. The central axis can only be retracted, and its outward extension is reset by setting a spring. Specifically, the driving part 3 includes a movable end 31, and the movable end 31 can be in the inner cavity 101 along a direction parallel to the valve port 102. The movable end 31 is connected to the valve core 2 in a transmission manner to drive the valve core 2 to move synchronously. The movable end 31 is the part of the central axis connecting the valve core 2. The movable end 31 is relatively fixed to the first valve plate, and drives the second valve plate to open through the first valve plate. When the internal pressure of the oil tank is low and the driving part 3 is not in motion, the first valve plate moves toward the connecting cavity 103, thereby opening the valve port 102. During this process, the second valve plate does not move.

[0037] In addition, the driving part 3 also includes a protective shell 32, which is fixed in the inner cavity 101. The movable end 31 is arranged on the protective shell 32. An air flow channel is formed between the protective shell 32 and the inner wall of the shell 1 to connect the valve port 102 and the external interface 104.

[0038] Since the driving part 3 is selected as an electromagnetic assembly, a protection structure needs to be arranged outside for protection. The protection shell 32 is in a whole cylindrical shape, and the outer diameter is smaller than the internal size of the inner cavity 101, so that a gas flow channel for gas flow is formed between the outer wall of the protection shell 32 and the inner wall of the inner cavity 101, thereby realizing the communication of the valve port 102 and the external interface 104, so that when the oil tank exchanges with the external gas, the gas can pass through the valve body from the inside to the outside, which avoids the interfaces of the two valve bodies being arranged only vertically to the valve body, and is more beneficial to the arrangement in space.

[0039] After the gas flow channel is arranged, in order to fix the driving part 3 in the shell 1 without affecting the flow area of the gas flow channel, a fixing seat 15 is arranged in the inner cavity 101 of the shell 1. The fixing seat 15 is fixed with the protection shell 32, and a through port for gas flow is arranged on the fixing seat 15.

[0040] It should be noted that the fixing seat 15 is fixed on the end of the inner cavity 101, and can be arranged on one side of the valve port 102 or close to the external interface 104.

[0041] Specifically, in order to improve the stability of the installation of the driving part 3, the number of the fixing seat 15 is two, and is arranged on both sides of the length direction of the protection shell 32. One of the fixing seat 15 is arranged on the outside of the valve port 102, and the valve core 2 extends into the fixing seat 15.

[0042] The fixing seat 15 can be arranged in a tab shape, and the two fixing seats 15 are arranged on both sides of the protection shell 32 to fix the position. It should be noted that the protection shell 32 also needs to be provided with a slot, a limiting protrusion and other structures matched with the fixing seat 15.

[0043] As a preferred embodiment, the shell 1 comprises a main shell 11, an end cover 12 and a bottom cover 13. One end of the main shell 11 is arranged in an open manner. The end cover 12 is fixed with the main shell 11 and closes the opening of the main shell 11 to form the inner cavity 101 and the external interface 104. The bottom cover 13 is fixed on the outside of the main shell 11 and forms the connecting cavity 103 on the main shell 11.

[0044] The main shell 11, the end cover 12 and the bottom cover 13 can be respectively injection molded. For the components in the shell 1, the end cover 12 and the bottom cover 13 can be installed after assembly. The connection forms include but are not limited to welding, screw connection, threaded connection and the like.

[0045] In addition, the shell 1 also comprises a side cover 14. One side of the main shell 11 is arranged in an open manner. The side cover 14 is fixed with the main shell 11 and closes the opening to form the inner cavity 101. The side cover 14 is provided with an electrical interface.

[0046] The side cover 14 can also be used for installing the driving part 3 and other parts, and a separate space is arranged in the side cover 14 and used for installing a control circuit board, the control circuit board is electrically connected with the driving part 3 and supplies power, so that the valve body is electrically opened and closed, and an electrical interface on the side cover 14 is used for connecting the control circuit board and realizing transmission of electrical signals.

[0047] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated fuel tank multifunctional valve, characterized by: It comprises a housing (1), a valve core (2) and a driving part (3), wherein: The housing (1) is horizontally fixed on the oil tank, and one side extends into the oil tank. The housing (1) is provided with an inner cavity (101), a valve port (102), a connecting cavity (103) and an external port (104). The inner cavity (101) is provided outside the oil tank. The valve port (102) and the external port (104) are respectively located at two ends of the inner cavity (101) and are communicated through the inner cavity (101). The connecting cavity (103) extends from the outside of the oil tank to the inside of the oil tank and connects the valve port (102) and the oil tank. The valve core (2) is arranged in the inner cavity (101), and the valve core (2) can close and open the valve port (102) to change the communication state between the inner cavity (101) and the connecting cavity (103); The driving part (3) is fixed in the housing (1) and is in driving connection with the valve core (2) for driving the valve core (2) to leave the valve port (102).

2. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: It also includes a fuel tank flange (4), the housing (1) and the fuel tank flange (4) are fixed in one piece, and the fuel tank flange (4) is a fuel tank sealing member used for sealing the corresponding opening of the fuel tank.

3. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: The driving portion (3) includes a movable end (31), and the movable end (31) can be moved in the inner cavity (101) along a direction parallel to the valve port (102). The movable end (31) is in transmission connection with the valve core (2) to drive the valve core (2) to move synchronously.

4. The integrated fuel tank multifunctional valve according to claim 3, characterized in that: The driving portion (3) further comprises a protective shell (32), the protective shell (32) being fixed in the inner cavity (101), the movable end (31) being arranged on the protective shell (32), and an air flow channel being formed between the protective shell (32) and the inner wall of the housing (1) to connect the valve port (102) and the external interface (104).

5. The integrated fuel tank multifunctional valve according to claim 3, characterized in that: The housing (1) comprises a fixing seat (15) arranged in the inner cavity (101), the fixing seat (15) being fixed to the protective shell (32), and a through opening for airflow to pass through is provided on the fixing seat (15).

6. The integrated fuel tank multifunctional valve according to claim 5, characterized in that: The number of the fixing seats (15) is set to two, and they are respectively located on both sides of the protective shell (32) in the length direction, one of the fixing seats (15) is arranged outside the valve port (102), and the valve core (2) extends into the fixing seat (15).

7. The integrated fuel tank multifunctional valve according to claim 1, characterized in that: The housing (1) comprises a main housing (11), an end cover (12) and a bottom cover (13), wherein: One end of the main shell (11) is open; The end cover (12) is fixed to the main shell (11) and closes the opening of the main shell (11) to form an inner cavity (101) and an outer interface (104); The bottom cover (13) is fixed to the outside of the main shell (11) and forms a connecting cavity (103) on the main shell (11).

8. The integrated fuel tank multifunctional valve according to claim 7, characterized in that: The housing (1) further comprises a side cover (14); one side of the main housing (11) is provided with an opening; the side cover (14) is fixed to the main housing (11) and closes the opening to form an inner cavity (101); an electrical interface is provided on the side cover (14).

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