Leakage-proof structure of automobile fuel tank

Abstract

An automobile fuel tank leakproof structure comprises a fuel tank body, an internal pipeline, an external pipeline and a liquid collector. And one end of the internal pipeline is connected with the evaporation discharge valve. And one end of the external pipeline is connected with the carbon tank. The liquid collector is arranged in the oil tank body. The liquid collector comprises a liquid inlet and a liquid outlet. The liquid inlet is communicated with the other end of the internal pipeline. And the liquid outlet is communicated with an external pipeline and penetrates through the other end in the oil tank body. The liquid outlet is higher than the liquid inlet in the height direction of the automobile. And the pipeline direction from the liquid outlet to the external pipeline is in a continuous rising trend. According to the anti-leakage structure of the automobile fuel tank, the liquid collector is additionally arranged, the layout of pipelines inside and outside the fuel tank is optimized at the same time, double anti-leakage barriers are formed, fuel is effectively prevented from leaking to a carbon tank, and negative effects caused by failure of the carbon tank are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to an automobile oil tank technical field especially a kind of automobile fuel tank anti-leakage structure. BACKGROUND

[0002] When hard off-road hybrid vehicle travels in complex and bad road conditions, it faces higher collision and jolt risk than ordinary vehicles, and the safety of fuel tank is crucial. Fuel in the fuel tank may leak due to violent jolt, collision or temperature change of the vehicle, and if the leaked fuel directly enters the carbon canister, it will not only affect the normal work of the carbon canister and reduce its ability to adsorb fuel vapor, but also may cause fuel vapor emission to exceed the standard, pollute the environment and other risks. SUMMARY

[0003] The utility model aims at providing a kind of automobile fuel tank anti-leakage structure, which can effectively prevent fuel from leaking into carbon canister and avoid the negative effects caused by carbon canister failure.

[0004] The utility model provides a kind of automobile fuel tank anti-leakage structure, including an oil tank body, an internal pipeline, an external pipeline and a liquid collector. The internal pipeline is arranged in the oil tank body and connected to the evaporation emission valve at one end. The external pipeline is arranged in the oil tank body and connected to the carbon canister at one end. The liquid collector is arranged in the oil tank body. The liquid collector includes a liquid inlet and a liquid outlet. The liquid inlet is connected to the other end of the internal pipeline. The liquid outlet is connected to the other end of the external pipeline arranged in the oil tank body. The liquid outlet is higher than the liquid inlet along the height direction of the automobile. The pipeline direction from the liquid outlet to the external pipeline shows a continuous upward trend.

[0005] The automobile fuel tank anti-leakage structure provided by the utility model adds a liquid collector, optimizes the layout of internal and external pipelines of the oil tank, forms a double anti-leakage barrier, effectively prevents fuel from leaking into carbon canister, and avoids the negative effects caused by carbon canister failure.

[0006] In another illustrative embodiment of the automobile fuel tank anti-leakage structure, the liquid collector has a sealed cavity.

[0007] In another illustrative embodiment of the automobile fuel tank anti-leakage structure, the liquid collector is located in the cavity and has an oil groove arranged protrudingly. The oil groove is arranged obliquely and gradually rises to communicate with the liquid outlet.

[0008] In another illustrative embodiment of the automobile fuel tank anti-leakage structure, the liquid collector further includes a plurality of baffles. The plurality of baffles are evenly distributed and arranged in the cavity, and connected to the peripheral wall of the liquid collector.

[0009] In another illustrative embodiment of the automobile fuel tank anti-leakage structure, the evaporation emission valve includes an FLVV valve and an ROV valve.

[0010] In another exemplary embodiment of the automobile fuel tank anti-leakage structure, the FLVV valve and the ROV valve are connected in parallel to the internal pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0011] The following drawings only illustrate and explain the utility model, and do not limit the scope of the utility model.

[0012] Figure 1 It is a structure schematic view of an exemplary embodiment of the automobile fuel tank anti-leakage structure.

[0013] Figure 2 As shown in Figure 1 It is a partial structure schematic view of the automobile fuel tank anti-leakage structure.

[0014] Figure 3 As shown in Figure 1 It is a partial structure schematic view of the automobile fuel tank anti-leakage structure.

[0015] REFERENCE NUMERALS

[0016] 10 tank body

[0017] 20 internal pipeline

[0018] 30 external pipeline

[0019] 40 liquid collector

[0020] 41 cavity

[0021] 42 liquid inlet

[0022] 43 oil groove

[0023] 431 flow limiting port

[0024] 44 liquid outlet

[0025] 45 baffle DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, objectives and effects of the utility model, the specific embodiments of the utility model will be explained with reference to the drawings, and the same numerals in the drawings represent the same or similar structures with the same function.

[0027] In this paper, "exemplary" means "serving as an example, instance or illustration", and any illustration or embodiment described as "exemplary" in this paper should not be interpreted as a more preferred or more advantageous technical solution.

[0028] Figure 1 It is a structure schematic view of an exemplary embodiment of the automobile fuel tank anti-leakage structure. Figure 2Fig. 1 is a schematic view of a part of a fuel tank leak-proof structure for a vehicle. Figure 1 and Figure 2 As shown in the figure, the fuel tank leak-proof structure for a vehicle comprises a fuel tank body 10, an inner pipeline 20, an outer pipeline 30 and a liquid collector 40. In the present exemplary embodiment, the fuel tank body 10 is provided with a fuel storage chamber. The inner pipeline 20 is arranged in the chamber, and one end of the inner pipeline 20 is connected to a FLVV valve and a ROV valve arranged in parallel. The outer pipeline 30 penetrates the fuel tank body 10 and extends to be connected to a carbon canister. The liquid collector 40 is arranged in the fuel tank body 10 in the fuel storage chamber and is connected to the inner pipeline 20 and the outer pipeline 30, thereby preventing fuel in the fuel tank from overflowing into the carbon canister under severe working conditions of the vehicle.

[0029] The liquid collector 40 comprises an inlet 42 and an outlet 44. In the present exemplary embodiment, the outlet 44 is higher than the inlet 42 along the height direction of the vehicle, so as to prevent fuel from overflowing. The inlet 42 and the outlet 44 are respectively communicated with the inner pipeline 20 and the outer pipeline 30 through flanges, and sealing gaskets are arranged between the flanges to ensure sealing.

[0030] In the present exemplary embodiment, the pipeline of the outlet 44 to the outer pipeline 30 has a continuous upward trend, and the inner pipeline 20 is lower than the outer pipeline 30, thereby further preventing fuel from overflowing into the carbon canister, so as to ensure the safety and reliability of the vehicle under any working conditions and to ensure the environmental protection performance.

[0031] Figure 3 Fig. 2 is a schematic view of a part of the liquid collector of the fuel tank leak-proof structure for a vehicle. Figures 1 to 3 As shown in the figure, the liquid collector 40 has a sealed cavity 41. In the present exemplary embodiment, the liquid collector 40 is made of a corrosion-resistant and high-strength alloy material, thereby ensuring the stability of the leak-proof structure. The liquid collector 40 is provided with an oil groove 43 protruding from the cavity 41. The oil groove 43 is arranged to be inclined and gradually upwardly communicated with the outlet 44, thereby further preventing fuel from overflowing. The end of the oil groove 43 away from the outlet 44 is provided with a flow-limiting opening 431, through which the flow rate of fuel is adjusted to prevent overflow. The liquid collector 40 further comprises a plurality of baffles 45, which are evenly distributed and arranged in the cavity 41 and connected to the peripheral wall of the liquid collector 40. During the process of violent shaking of fuel in the fuel tank under severe working conditions of the vehicle, the fuel in the liquid collector 40 is repeatedly divided and collided by the baffles 45, so that the liquid level fluctuation is significantly reduced, fuel overflow is further prevented, and the safety and reliability of the vehicle are ensured.

[0032] It should be understood that although the present specification is described in terms of various embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0033] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent implementation or modification, such as combination, division or repetition of features, shall be included in the protection scope of the present application without departing from the spirit of the present application.

Claims

1. A fuel tank leak prevention structure for an automobile, characterized by comprising: The utility model relates to an oil tank body (10), an internal pipeline (20) arranged in the oil tank body (10), one end of the internal pipeline (20) being connected with an evaporation emission valve, an external pipeline (30) penetrating and winding in the oil tank body (10), one end of the external pipeline (30) being connected with a carbon tank, and a liquid collector (40) arranged in the oil tank body (10), the liquid collector (40) comprising an inlet (42) communicating with the other end of the internal pipeline (20) and an outlet (44) communicating with the other end of the external pipeline (30) penetrating in the oil tank body (10), the outlet (44) being higher than the inlet (42) in the automobile height direction, and the pipeline direction of the outlet (44) to the external pipeline (30) being continuously upward. The liquid collector (40) has a sealed cavity (41) therein. The liquid collector (40) is provided with an oil groove (43) protruding from the cavity (41), the oil groove (43) being obliquely arranged and gradually rising to communicate with the outlet (44). The end of the oil groove (43) away from the outlet (44) is provided with a flow-limiting opening (431). The liquid collector (40) further comprises a plurality of baffles (45) evenly distributed and arranged on the cavity (41) and connected with the peripheral wall of the liquid collector (40). The evaporation emission valve comprises an FLVV valve and an ROV valve. The FLVV valve and the ROV valve are connected in parallel to the internal pipeline (20). ​ ​ 2. The automobile fuel tank leak prevention structure according to claim 1, wherein ​ 3. The automobile fuel tank leak prevention structure according to claim 2, wherein ​ 4. The fuel tank leak protection structure for an automobile according to claim 3, wherein ​ 5. The automobile fuel tank leak prevention structure according to claim 2, wherein ​ 6. The automobile fuel tank leak prevention structure according to claim 1, wherein ​ 7. The fuel tank leak protection structure for an automobile according to claim 6, wherein ​

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