Automatic pressure relief system for oil tank and automobile

Abstract

The utility model provides an automatic pressure relief system for an oil tank. The automatic pressure relief system comprises a force application piece, an elastic driving assembly, a separated contact switch and an oil tank isolating valve. The force applying piece is arranged on the fuel tank cover body and applies driving force to the elastic driving assembly when the fuel tank cover body covers the fuel tank filler; the separated contact switch is provided with a movable contact and a static contact, the movable contact is arranged on the elastic driving assembly and electrically connected to a control signal source, and the static contact is fixed and electrically connected with the control input end of the oil tank isolation valve. The elastic driving assembly is used for overcoming elastic force to move under the action of driving force and driving the movable contact to be separated from the static contact. The elastic driving assembly is further used for driving the movable contact and the static contact to be in contact and electrically connected through the elastic force when the fuel tank cover body is loosened. When the movable contact and the static contact are in contact and electrically connected, the control signal source outputs a pressure relief instruction to the oil tank isolation valve. By means of the system, automatic pressure relief can be achieved when the oil filling cover is unscrewed.

Description

Technical Field

[0001] The utility model relates to the field of automatic pressure relief, in particular to an automatic oil tank pressure relief system and a car. Background Art

[0002] Before refueling the car, you need to open the fuel tank isolation valve to release the pressure. If you do not open the fuel tank isolation valve to release the pressure or fail to open the fuel tank isolation valve in time, there is a risk of fuel backsplash during the refueling process, and it may also cause the refueling gun to jump, affecting the refueling efficiency.

[0003] In the prior art, users are often required to press the pressure relief button of the fuel tank isolation valve before opening the fuel filler cap. However, this method is not only inconvenient but also easy for users to forget. Once users forget to press the pressure relief button, there may be a risk of fuel spillage.

[0004] Therefore, in order to solve the above technical problems, it is urgent to propose a new technical means. Utility Model Content

[0005] In order to avoid the risk caused by the user forgetting to press the pressure relief button of the fuel tank isolation valve, the utility model provides an automatic fuel tank pressure relief system and a vehicle.

[0006] The utility model provides an automatic oil tank pressure relief system, comprising: a force applying member, an elastic driving component, a separate contact switch and an oil tank isolation valve;

[0007] The force applying member is provided on the fuel tank cover body and applies driving force to the elastic driving assembly when the fuel tank cover body is closed with the fuel tank filling port;

[0008] The separate contact switch has a moving contact and a stationary contact, wherein the moving contact is provided on the elastic drive assembly and electrically connected to a control signal source, and the stationary contact is fixed and electrically connected to a control input terminal of the oil tank isolation valve;

[0009] The elastic drive component is used to overcome the elastic force and move under the action of the driving force and drive the moving contact and the static contact to separate. The elastic drive component is also used to drive the moving contact and the static contact to be in electrical contact and connection through the elastic force when the oil tank cover is loosened; when the moving contact and the static contact are in electrical contact and connection, the control signal source outputs a pressure relief instruction to the oil tank isolation valve.

[0010] Furthermore, the force-applying member is a plate-type structure, the upper end of the force-applying member is fixedly arranged on the outer side wall of the skirt of the fuel tank cover body, and the lower end of the force-applying member is a free end and the free end is the driving force output end of the force-applying member.

[0011] Furthermore, the lower end portion of the force applying member is an inclined structure.

[0012] Furthermore, the elastic driving assembly includes a driving plate and a spring, the upper end of the driving plate is a free end and the driving plate is slidably arranged on the oil tank, the upper end of the spring is fixedly connected to the lower end of the driving plate, the lower end of the spring is a fixed end and is fixed, and the moving contact is fixedly arranged on the driving plate.

[0013] Furthermore, the upper end of the driving plate is an inclined surface structure, and the inclined surface structure of the upper end of the driving plate and the inclined surface structure of the lower end of the force applying member are opposite to and in contact with each other when the fuel tank cover is closed.

[0014] Furthermore, the elastic drive component also includes a mounting seat, which is fixedly arranged on the oil tank, and a limiting slide groove is fixedly arranged on the mounting seat. The driving plate passes through the limiting slide groove and slides along the length direction of the driving plate. A spring seat is also provided on the mounting seat, and the lower end of the spring is fixedly arranged on the spring seat.

[0015] Furthermore, there are two springs, and the two springs are arranged in parallel.

[0016] Furthermore, a control signal source is provided in the spring seat.

[0017] Correspondingly, the present invention also provides a car, which is equipped with the above-mentioned automatic fuel tank pressure relief system.

[0018] The beneficial effects of the present invention are as follows: the present invention loosens the fuel cap, causing the elastic drive assembly to drive the moving contact to move, thereby causing the moving contact to be electrically connected to the static contact. When connected, the control signal source outputs a pressure relief instruction to the fuel tank isolation valve, thereby achieving pressure relief while opening the fuel cap, which not only improves refueling efficiency, but also reduces the complexity of user operations; it also effectively prevents the occurrence of fuel backspray, greatly improving the safety of the vehicle during refueling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a top view of the utility model installed on the fuel tank.

[0021] Figure 2 This is a side view of the utility model installed on the fuel tank.

[0022] Figure numerals: 1-force applying member, 2-spring, 3-spring seat, 4-driving plate, 5-moving contact, 6-mounting seat, 7-limiting slide groove, 8-static contact. DETAILED DESCRIPTION

[0023] The following is a further description of the present invention with reference to the accompanying drawings:

[0024] The utility model provides an automatic oil tank pressure relief system, comprising: a force applying member 1, an elastic driving component, a separate contact switch and an oil tank isolation valve;

[0025] The force applying member 1 is provided on the fuel tank cover body and applies driving force to the elastic driving assembly when the fuel tank cover body is closed with the fuel tank filling port;

[0026] The separate contact switch has a moving contact 5 and a stationary contact 8, wherein the moving contact 5 is provided on the elastic drive assembly and electrically connected to the control signal source, and the stationary contact 8 is fixed and electrically connected to the control input terminal of the oil tank isolation valve;

[0027] The elastic drive assembly is used to overcome the elastic force under the action of the driving force and move the movable contact 5 and the static contact 8 to separate. The elastic drive assembly is also used to drive the movable contact 5 and the static contact 8 to make electrical contact through the elastic force when the fuel tank cover is loosened. When the movable contact 5 and the static contact 8 are in electrical contact, the control signal source outputs a pressure relief command to the fuel tank isolation valve.

[0028] The force member 1 is preferably made of a non-conductive and non-deformable material, and the movable contact 5 and the static contact 8 are preferably made of a material with good conductive properties. The fuel tank isolation valve is an independent module with a separate control logic, which is a prior art and will not be described in detail here. The up, down, left, right, horizontal and vertical directions in this application are all based on Figure 1 The directions shown in are relative directions.

[0029] Through the above system, the moving contact and the static contact can be disconnected when the fuel cap is tightened; when the fuel cap is loosened, the moving contact and the static contact are electrically connected, and the control signal source outputs a pressure relief command to the fuel tank isolation valve, thereby realizing automatic pressure relief when the fuel cap is loosened.

[0030] In this embodiment, the force-applying member 1 can also be set as a circular ring structure, and the upper end of the force-applying member 1 of the circular ring structure is fixedly arranged along the outer side wall of the skirt of the fuel tank cover body, and the center of the circular ring coincides with the center of the fuel tank cover body. The lower end of the force-applying member of the circular ring structure is a free end and the free end contacts the driving plate 4 when the cover body is tightened. This structure can ensure that before the driving member moves upward to the upper limit, the driving member 4 moves synchronously with the cover body, that is, the driving member 4 moves the same distance as the cover body moves upward; and it can avoid the generation of lateral force acting on the driving member 4 when the cover body is tightened, thereby causing the driving member 4 to produce lateral displacement.

[0031] In this embodiment, the force member 1 is a plate structure, the upper end of the force member 1 is fixedly arranged on the outer wall of the skirt of the fuel tank cover body, and the lower end of the force member 1 is a free end and the free end is the driving force output end of the force member 1.

[0032] In this embodiment, the lower end of the force applying member 1 is an inclined structure.

[0033] In this embodiment, the elastic drive assembly includes a drive plate 4 and a spring 2. The upper end of the drive plate 4 is a free end and the drive plate 4 is slidably arranged on the oil tank. The upper end of the spring 2 is fixedly connected to the lower end of the drive plate 4. The lower end of the spring 2 is a fixed end and is fixed. The moving contact 5 is fixedly arranged on the drive plate 4. In this way, the moving contact 5 can move with the movement of the drive plate 4.

[0034] The spring 2 is preferably a spring with good electrical conductivity, and the driving plate 4 is preferably made of a material with good electrical conductivity and not prone to deformation.

[0035] In this embodiment, the upper end of the driving plate 4 is a sloped structure, and the sloped structure of the upper end of the driving plate 4 and the sloped structure of the lower end of the force applying member 1 are opposite and in contact when the fuel tank cover is closed. Figure 1 As shown, the inclined surface structure at the upper end of the driving plate 4 and the inclined surface structure at the lower end of the force member 1 are both structures inclined from the upper left to the lower right. Since the conventional tightening direction of the cover is counterclockwise, when the cover needs to be tightened counterclockwise, the lower end of the force member 1 is set to an inclined surface. When the force member 1 contacts the driving plate 4, a downward component of force is applied to the driving plate 4, causing the driving plate 4 to move downward, thereby avoiding the driving plate 4 adding resistance to the force member 1 in the lateral direction, and facilitating screwing the force member 1 to the target position.

[0036] In this embodiment, the elastic drive assembly further includes a mounting seat 6, which is fixedly mounted on the oil tank. A limiting slot 7 is fixedly disposed on the mounting seat 6. The drive plate 4 passes through the limiting slot 7 and slides along the length direction of the drive plate 4. The limiting slots 7 are preferably disposed on both sides of the drive plate 4 and surround the drive plate 4, thereby limiting the lateral displacement of the drive plate 4. The mounting seat 6 is further provided with a spring seat 3, to which the lower end of the spring 2 is fixedly mounted. The provision of the limiting slot 7 ensures that the drive plate 4 can slide along its length direction and prevents the force-applying member 1 from applying excessive lateral force to the drive plate 4 during tightening, thereby preventing the drive plate 4 from excessively displacing in the lateral direction and causing the movable contact 5 to displace laterally, thereby resulting in a failure of the movable contact 5 to contact the static contact 8.

[0037] In this embodiment, there are two springs 2, which are arranged in parallel. Providing too many springs 2 will increase the difficulty of tightening the fuel filler cap, while providing too few springs 2 may prevent the drive plate 4 from sliding to the target position, preventing the movable contact 5 from contacting the stationary contact 8. Providing two springs 2 ensures that sufficient elastic force is applied to the drive plate 4, ensuring contact between the movable contact 5 and the stationary contact 8, while using minimal force to tighten the fuel filler cap.

[0038] In this embodiment, a control signal source is provided in the spring seat 3. The control signal source can be a power supply or a controller connected to the power supply. When the control signal source is a power supply, a button battery is preferably provided in the spring seat 3. When the moving contact 5 is disconnected from the static contact 8, the button battery outputs a low level. When the moving contact 5 is in contact with the static contact 8, the button battery outputs a high level. The oil tank isolation valve realizes pressure relief through independent control logic. If the control signal source is a controller, an existing single-chip microcomputer, control circuit, etc. can be used.

[0039] When refueling is needed, the fuel tank cover is loosened, and the force-applying member 1 rotates with the fuel tank cover, and no longer applies driving force to the driving plate 4. At this time, the driving plate 4 slides upward due to the elastic force generated by the compression of the spring 2, and the driving plate 4 drives the moving contact 5 to move. When the upper limit of the upward displacement of the driving plate 4 is reached, the moving contact 5 is electrically connected with the static contact 8, and the button battery outputs a high level to the fuel tank isolation valve, and the fuel tank isolation valve is depressurized. Figure 1 (b) shown.

[0040] When refueling is completed and the fuel tank cover needs to be tightened, the force-applying member 1 rotates counterclockwise with the fuel tank cover. When the force-applying member 1 drops to the point where it contacts the driving plate 4, the force-applying member 1 will apply a lateral force to the driving plate 4 to the left. Since the driving plate 4 is also arranged in the limiting slide groove 7, when the driving plate 4 contacts the limiting slide groove 7, the limiting slide groove 7 applies a lateral force to the right to the driving plate 4, so that the lateral force applied to the driving plate 4 is offset in the horizontal direction. The force-applying member 1 will also apply a downward force to the driving plate 4, so that the driving plate 4 overcomes the elastic force and moves downward, thereby allowing the force-applying member 1 to smoothly return to the target position and tighten the fuel tank cover. In this process, the driving plate 4 moves downward, driving the moving contact 5 to move downward, thereby disconnecting the moving contact 5 from the static contact 8, and the button battery outputs a low level. Figure 1 As shown in (a); when the fuel tank cover is tightened, the thread between the cover and the fuel filler port bears the elastic force applied by the spring to the driving member;

[0041] This application is also applicable to other box structures that require air release.

[0042] Correspondingly, the present invention also provides a car, which is equipped with the above-mentioned automatic fuel tank pressure relief system.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An automatic fuel tank pressure relief system, characterized by: include: Force-applying member, elastic drive assembly, separate contact switch and tank isolation valve; The force applying member is provided on the fuel tank cover body and applies driving force to the elastic driving assembly when the fuel tank cover body is closed with the fuel tank filling port; The separate contact switch has a moving contact and a stationary contact, wherein the moving contact is provided on the elastic drive assembly and electrically connected to a control signal source, and the stationary contact is fixed and electrically connected to a control input terminal of the oil tank isolation valve; The elastic drive component is used to overcome the elastic force and move under the action of the driving force and drive the moving contact and the static contact to separate. The elastic drive component is also used to drive the moving contact and the static contact to be in electrical contact and connection through the elastic force when the oil tank cover is loosened; when the moving contact and the static contact are in electrical contact and connection, the control signal source outputs a pressure relief instruction to the oil tank isolation valve.

2. The fuel tank automatic pressure relief system according to claim 1, characterized in that: The force applying member is a plate structure, the upper end of the force applying member is fixedly arranged on the outer side wall of the skirt of the fuel tank cover body, and the lower end of the force applying member is a free end and the free end is the driving force output end of the force applying member.

3. The fuel tank automatic pressure relief system according to claim 2, characterized in that: The lower end portion of the force applying member is an inclined surface structure.

4. The automatic fuel tank pressure relief system according to claim 3, characterized in that: The elastic driving assembly includes a driving plate and a spring. The upper end of the driving plate is a free end and the driving plate is slidably arranged on the oil tank. The upper end of the spring is fixedly connected to the lower end of the driving plate. The lower end of the spring is a fixed end and is fixed. The moving contact is fixedly arranged on the driving plate.

5. The automatic fuel tank pressure relief system according to claim 4, characterized in that: The upper end of the driving plate is an inclined surface structure, and the inclined surface structure of the upper end of the driving plate and the inclined surface structure of the lower end of the force applying member are opposite to and in contact with each other when the fuel tank cover is closed.

6. The fuel tank automatic pressure relief system according to claim 4, characterized in that: The elastic drive assembly also includes a mounting seat, which is fixedly arranged on the oil tank. A limiting slide is fixedly provided on the mounting seat. The driving plate passes through the limiting slide and slides along the length direction of the driving plate. A spring seat is also provided on the mounting seat, and the lower end of the spring is fixedly arranged on the spring seat.

7. The automatic fuel tank pressure relief system according to claim 6, characterized in that: There are two springs, and the two springs are arranged in parallel.

8. The fuel tank automatic pressure relief system according to claim 6, characterized in that: A control signal source is arranged in the spring seat.

9. An automobile, characterized in that: The automobile is equipped with the fuel tank automatic pressure relief system according to any one of claims 1 to 8.

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