A fuel tank filler neck inner housing assembly
Patent Information
- Application Number
- CN202522108206.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-30
AI Technical Summary
当积液水平过高时，传感器极易误触发，导致加油过程提前终止（即“误跳枪”），这不仅影响用户体验，降低加油效率，还可能因多次重复操作增加燃油泄漏的风险
本实用新型提供了一种燃料箱加注口内壳组件，其原理是：加油枪从插枪通道进入枪头限位腔，加油枪枪头限位于枪头限位腔内，加油过程中导流腔用于引导油液使油液顺畅流出。在加油过程中油液会部分地回溅以致在导流套内产生积液，这就会导致加油枪上的传感器会感应到导流套内回溅或积蓄的油液，以致误判油箱加满而造成提前跳枪。因此，在安装姿态下对应枪头限位腔的下侧设置了漏油口，以及时排出积液，并且通过托板将加油枪头抬高以降低积液误触加油枪传感器的几率，从而避免误判油箱加满的情况发生。
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Figure CN224828583U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fuel tank filler neck manufacturing technology, specifically to a fuel tank filler neck inner shell assembly. Background Technology
[0002] With the continuous development of automotive fuel filling systems, capless fuel filler systems have become the mainstream configuration in modern vehicles due to their ease of operation, excellent sealing performance, and ability to effectively reduce fuel vapor leakage. This system typically includes a built-in flip-top sealing mechanism, allowing the fuel nozzle to be directly inserted and enter the fuel tank through the nozzle channel. After refueling, the sealing cap automatically resets to maintain the system's airtightness. However, during actual refueling, turbulence and splashing can easily occur in the fuel flow, especially towards the end of refueling, where fuel may accumulate in the inner shell and flow guiding structure.
[0003] The shortcoming of existing technology is that the splashed fuel accumulates in the space around the fuel nozzle. The fuel nozzle is equipped with a fuel level sensor to determine if the tank is full. When the fuel level is too high, the sensor is prone to false triggering, causing the refueling process to terminate prematurely (i.e., "false nozzle disconnection"). This not only affects the user experience and reduces refueling efficiency, but may also increase the risk of fuel leakage due to repeated operations. Therefore, an internal structure that can effectively guide and drain the accumulated fuel is needed to improve the accuracy of the refueling process and the stability of the system. Utility Model Content
[0004] To overcome the shortcomings of the prior art, this utility model provides a fuel tank filling port inner shell assembly, which can effectively prevent the refueling nozzle from accidentally shutting off during the refueling process.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A fuel tank filler neck inner shell assembly, comprising: The nozzle sealing seat has a nozzle insertion channel, and a sealing cover is movably connected to the nozzle insertion channel to seal the nozzle insertion channel. The flow guide sleeve has a nozzle head limiting cavity and a flow guide cavity inside. The nozzle head limiting cavity is connected to the outlet end of the nozzle insertion channel, and the flow guide cavity is located at the end of the nozzle head limiting cavity away from the nozzle insertion channel. An oil leakage port is penetrating through the side wall of the nozzle head limiting cavity. In the installed position, the oil leakage port is located on the lower side of the nozzle head limiting cavity. A support plate extends from the inner wall of the nozzle head limiting cavity adjacent to the oil leakage port. The support plate is used to raise the refueling nozzle.
[0006] Furthermore, in a fuel tank filling port inner shell assembly of this application, the inner wall of the nozzle limiting cavity is provided with paired limiting ribs on both sides, which are used to limit the nozzle head on both sides. As a preferred embodiment of this application, this ensures that the nozzle head is centered within 201, avoiding increased oil backsplashing or sensor false triggering due to deviation, while improving the stability and sealing reliability of the refueling process.
[0007] Furthermore, in a fuel tank filling port inner shell assembly of this application, the front end of the limiting rib extends to the inner wall of the flow guide cavity to form a reinforcing section. As a preferred embodiment of this application, the reinforcing section serves as a reinforcing rib to strengthen the structural strength of the flow guide cavity wall.
[0008] Furthermore, in a fuel tank filling port inner shell assembly of this application, a pair of trays are laterally symmetrically arranged on the lower side of the inner wall of the nozzle limiting cavity, and the oil drain port includes a central oil drain port disposed between the pair of trays. As a preferred embodiment of this application, the space between the pair of trays can avoid the sensor at the bottom of the fuel nozzle, while the central oil drain port is directly opposite the sensor avoidance area, ensuring that the accumulated liquid is discharged smoothly and does not remain at the bottom of the nozzle.
[0009] Furthermore, in one fuel tank filling port inner shell assembly of this application, the edges on both sides of the central oil drain port are coplanar with the side walls of a pair of trays. As a preferred embodiment of this application, the opening size of the central oil drain port is maximized in the width direction to improve the efficiency of liquid drainage.
[0010] Furthermore, in a fuel tank filling port inner shell assembly of this application, the oil leak port further includes an outer leak port, which is located on the side of the tray away from the central oil leak port.
[0011] Furthermore, in one fuel tank filling port inner shell assembly of this application, a pair of sealing caps are rotatably connected to the inlet and outlet ends of the nozzle channel. The sealing caps rotate toward the nozzle to open the nozzle channel. A torsion spring is provided on the nozzle sealing seat, elastically abutting against the sealing caps. The torsion spring applies a torque to the sealing caps to close the nozzle channel. As a preferred embodiment of this application, during nozzle insertion, the fuel nozzle can push the sealing caps to rotate and open the nozzle channel. After the fuel nozzle is pulled out, the torsion spring drives the sealing caps to reset and close the nozzle channel, achieving automatic sealing.
[0012] Furthermore, in the fuel tank filling port inner shell assembly of this application, in the installed position, the positions of the pair of sealing caps rotatably connected to the nozzle sealing seat are respectively located on the upper side of the inlet and outlet ends of the nozzle channel. As a preferred embodiment of this application, during the refueling process, the pair of sealing caps can exert downward pressure on the refueling nozzle, effectively suppressing the shaking of the refueling nozzle during the refueling process.
[0013] Furthermore, in a fuel tank filling port inner shell assembly of this application, a groove is provided at the center of the outer end face of the sealing cap. The groove extends in the direction of rotational connection of the sealing cap and is open at both ends in the extension direction. As a preferred embodiment of this application, based on the above structure, during the insertion of the fuel nozzle, the fuel nozzle head abuts against the groove and pushes the sealing cap open. During this process, the groove is used to limit the sides of the fuel nozzle head to prevent lateral displacement when the fuel nozzle is inserted. When the fuel nozzle passes the sealing cap, the groove slides with the fuel nozzle to guide it. After the fuel nozzle is fully inserted, due to the action of the torsion spring, the groove fits against the outer wall of the fuel nozzle, providing a limiting effect.
[0014] Furthermore, in one fuel tank filling port inner shell assembly of this application, the cross-sectional profile of the groove is an axisymmetric arc, with the axis of symmetry of the arc located at the center of the sealing cap. This provides a centering and guiding effect for the fuel nozzle.
[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects: This utility model provides a fuel tank filling port inner shell assembly. The principle is as follows: the fuel nozzle enters the nozzle head limiting cavity through the nozzle insertion channel, and the nozzle head is limited within the nozzle head limiting cavity. During refueling, the guide cavity guides the fuel to flow smoothly. During refueling, some fuel may splash back, causing liquid accumulation within the guide sleeve. This can lead to the sensor on the fuel nozzle detecting the splashed or accumulated fuel, resulting in a false alarm that the tank is full and causing premature nozzle shut-off. Therefore, a drain port is provided on the lower side of the nozzle head limiting cavity in the installed position to drain accumulated liquid in a timely manner. Furthermore, a support plate raises the fuel nozzle head to reduce the probability of accumulated liquid accidentally triggering the fuel nozzle sensor, thereby preventing false alarms that the tank is full. Attached Figure Description
[0016] Figure 1 This is a plan view of a fuel tank filling port inner shell assembly according to an embodiment of this application; Figure 2 for Figure 1 A cross-sectional view along the AA direction (a fuel tank filling port inner shell assembly in an installed position); Figure 3 This is a three-dimensional structural schematic diagram of a fuel tank filling port inner shell assembly according to an embodiment of this application; Figure 4 for Figure 3 An exploded view of a component of the inner shell assembly of a fuel tank filling port; Figure 5 This is a schematic diagram of the flow guide sleeve in the embodiments of this application; Figure 6 This is a cross-sectional view of the flow guide sleeve in an embodiment of this application; Figure 7This is a plan view of the sealing cap in an embodiment of this application; Figure 8 for Figure 1 Cross-sectional view along the BB direction; In the diagram: 1-pipe sealing seat; 10-gun insertion channel; 11-sealing cap; 111-slide groove; 12-torsion spring; 2-Guide sleeve; 201-Nose limiting cavity; 202-Guide cavity; 21-Oil leak port; 211-Central oil leak port; 212-Outer liquid leak port; 22-Support plate; 23-Snap fastener; 24-Limiting rib; 241-Reinforcement section. Detailed Implementation
[0017] Combination Figures 1 to 4 The fuel tank filling port inner shell assembly shown includes: a pipe sealing seat 1, which has a nozzle insertion channel 10, and a sealing cover 11 movably connected to the nozzle insertion channel 10, the sealing cover 11 being used to seal the nozzle insertion channel 10; a flow guide sleeve 2, which has a nozzle head limiting cavity 201 and a flow guide cavity 202 inside, the nozzle head limiting cavity 201 being connected to the outlet end of the nozzle insertion channel 10, and the flow guide cavity 202 being located at the end of the nozzle head limiting cavity 201 away from the nozzle insertion channel 10; an oil leakage port 21 penetrating through the side wall of the nozzle head limiting cavity 201, the oil leakage port 21 being located on the lower side of the nozzle head limiting cavity 201 in the installed posture, and a support plate 22 extending from the inner wall of the nozzle head limiting cavity 201 adjacent to the oil leakage port 21, the support plate 22 being used to raise the refueling nozzle.
[0018] Based on the above structure, the principle of the fuel tank filling port inner shell assembly is as follows: the fuel nozzle enters the nozzle head limiting cavity 201 from the nozzle insertion channel 10, and the fuel nozzle head is limited within the nozzle head limiting cavity 201. During refueling, the guide cavity 202 is used to guide the fuel to flow out smoothly. During refueling, some fuel will splash back, causing liquid to accumulate in the guide sleeve 2. This will cause the sensor on the fuel nozzle to detect the splashed or accumulated fuel in the guide sleeve 2, leading to a false judgment that the fuel tank is full and causing the nozzle to shut off prematurely. Therefore, in the installed position, a drain port 21 is provided on the lower side of the nozzle head limiting cavity 201 to drain the accumulated liquid in time. Furthermore, the fuel nozzle head is raised by the support plate 22 to reduce the probability of accumulated liquid accidentally triggering the fuel nozzle sensor, thereby avoiding the situation of falsely judging that the fuel tank is full.
[0019] In this embodiment, the flow guide sleeve 2 and the pipe sealing seat 1 are connected by a snap fastener 23.
[0020] Combination Figure 2 , Figure 5 and Figure 6As shown, in this embodiment, the inner wall of the nozzle limiting cavity 201 is provided with paired limiting ribs 24 on both sides. The limiting ribs 24 are used to limit the nozzle head on both sides. This ensures that the nozzle head is centered within 201, avoiding increased oil splashing or sensor false triggering due to deviation, while improving the stability and sealing reliability of the refueling process. Specifically, in this embodiment, the front end of the limiting rib 24 extends to the inner wall of the flow guiding cavity 202 to form a reinforcing section 241. The reinforcing section 241 serves as a reinforcing rib to strengthen the structural strength of the wall shell of the flow guiding cavity 202.
[0021] Combination Figure 5 As shown, in this embodiment, a pair of trays 22 are symmetrically arranged laterally on the lower side of the inner wall of the nozzle limiting cavity 201, and the oil drain port 21 includes a central oil drain port 211 disposed between the pair of trays 22. The space between the pair of trays 22 can avoid the sensor at the bottom of the nozzle, while the central oil drain port 211 is directly opposite the sensor avoidance area, ensuring that the accumulated liquid is discharged smoothly and does not remain at the bottom of the nozzle.
[0022] Combination Figure 6 As shown, in this embodiment, the edges on both sides of the central oil drain 211 are coplanar with the sidewalls of the pair of trays 22. This maximizes the opening size of the central oil drain 211 in the width direction, improving the efficiency of liquid drainage.
[0023] In this embodiment, the oil drain 21 also includes an outer liquid drain 212, which is located on the side of the support plate 22 away from the central oil drain 211.
[0024] In this embodiment, a pair of sealing caps 11 are rotatably connected to the inlet and outlet ends of the nozzle insertion channel 10. The sealing caps 11 rotate toward the nozzle insertion direction to open the nozzle insertion channel 10. The nozzle sealing seat 1 is provided with a torsion spring 12 that elastically abuts against the sealing caps 11. The torsion spring 12 is used to apply a torque to the sealing caps 11 in the direction of closing the nozzle insertion channel 10. During nozzle insertion, the fuel nozzle can push the sealing caps 11 to rotate and open the nozzle insertion channel 10. After the fuel nozzle is pulled out, the torsion spring 12 drives the sealing caps 11 to reset and close the nozzle insertion channel 10, thereby achieving automatic sealing.
[0025] Combination Figure 2 As shown, in this embodiment, in the installed position, the pair of sealing caps 11 are rotatably connected to the nozzle sealing seat 1 and are respectively positioned on the upper side of the inlet and outlet ends of the nozzle channel 10. This allows the pair of sealing caps 11 to exert downward pressure on the nozzle during refueling, effectively suppressing the nozzle's shaking during the refueling process.
[0026] Combination Figure 7 and Figure 8As shown, in this embodiment, a groove 111 is provided in the center of the outer end face of the sealing cover 11. The groove 111 extends in the direction of rotational connection of the sealing cover 11 and is open at both ends in the extension direction. Based on the above structure, during the insertion of the nozzle, the oil nozzle head abuts against the groove 111 and pushes the sealing cover 11 open. During this process, the groove 111 is used to limit the two sides of the oil nozzle head to prevent lateral displacement when the nozzle is inserted. When the nozzle passes the sealing cover 11, the groove 111 slides with the nozzle to guide it. After the nozzle is fully inserted, the groove 111 fits against the outer wall of the nozzle due to the action of the torsion spring 12, thus limiting its position.
[0027] In this embodiment, the cross-sectional profile of the groove 111 is an axisymmetric arc, and the axis of symmetry of the arc is located at the center of the sealing cap 11. This has the effect of guiding the refueling nozzle in a centered manner.
[0028] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.
Claims
1. A fuel tank filling port inner shell assembly, characterized in that: include: The nozzle sealing seat (1) has a gun insertion channel (10) on it, and a sealing cover (11) is movably connected to the gun insertion channel (10). The sealing cover (11) is used to seal the gun insertion channel (10). The guide sleeve (2) has a gun head limiting cavity (201) and a guide cavity (202) inside. The gun head limiting cavity (201) is connected to the outlet end of the gun insertion channel (10), and the guide cavity (202) is located at the end of the gun head limiting cavity (201) away from the gun insertion channel (10). The side wall of the nozzle limiting cavity (201) has an oil leak port (21). In the installation position, the oil leak port (21) is located on the lower side of the nozzle limiting cavity (201). The inner wall of the nozzle limiting cavity (201) is provided with a support plate (22) adjacent to the oil leak port (21). The support plate (22) is used to raise the refueling nozzle.
2. The fuel tank filling port inner shell assembly according to claim 1, characterized in that: The inner wall of the nozzle limiting cavity (201) is provided with a pair of limiting ribs (24) on both sides, which are used to limit the nozzle on both sides.
3. The fuel tank filling port inner shell assembly according to claim 2, characterized in that: The front end of the limiting rib (24) extends to the inner wall of the guide cavity (202) to form a reinforcing section (241).
4. The fuel tank filling port inner shell assembly according to claim 1, characterized in that: A pair of trays (22) are symmetrically arranged laterally on the lower side of the inner wall of the gun head limiting cavity (201), and the oil leakage port (21) includes a central oil leakage port (211) arranged between the pair of trays (22).
5. The fuel tank filling port inner shell assembly according to claim 4, characterized in that: The edges on both sides of the central oil drain (211) are coplanar with the side walls of a pair of trays (22).
6. The fuel tank filling port inner shell assembly according to claim 4, characterized in that: The oil drain (21) also includes an outer drain (212), which is located on the side of the tray (22) away from the central oil drain (211).
7. The fuel tank filling port inner shell assembly according to claim 1, characterized in that: A pair of sealing caps (11) are rotatably connected to the inlet and outlet ends of the gun insertion channel (10). The sealing caps (11) are rotated toward the gun insertion direction to open the gun insertion channel (10). The port sealing seat (1) is provided with a torsion spring (12) that elastically abuts against the sealing caps (11). The torsion spring (12) is used to apply a torque to the sealing caps (11) in the direction of closing the gun insertion channel (10).
8. The fuel tank filling port inner shell assembly according to claim 7, characterized in that: In the installation position, the positions where the pair of sealing caps (11) and the pipe sealing seat (1) are rotatably connected are respectively set on the upper side of the inlet end and outlet end of the gun insertion channel (10).
9. The fuel tank filling port inner shell assembly according to claim 8, characterized in that: The outer end face of the sealing cover (11) is provided with a groove (111) in the center. The groove (111) extends in the direction of rotation of the sealing cover (11) and is open at both ends in the direction of extension.
10. The fuel tank filling port inner shell assembly according to claim 9, characterized in that: The cross-sectional profile of the groove (111) is an axisymmetric arc, and the axis of symmetry of the arc is located in the center of the sealing cover (11).