Zero-shaking leakage high-pressure fuel tank system

Abstract

The utility model discloses a high-pressure fuel tank system with zero shaking leakage rate, which comprises a fuel tank body, an upper shell and a lower shell are arranged on the fuel tank body, a fuel pump assembly is arranged at the upper end of the upper shell, an oil supply pipe assembly is further arranged on the upper shell, an FTIV is arranged on the side surfaces of the upper shell and the lower shell, and the FTIV is connected with the fuel pump assembly. A first wave-proof plate and a second wave-proof plate are installed in the fuel tank body, an LVS with a labyrinth structure inside is further arranged on the outer side of the fuel tank body, an LVS air inlet and an LVS air outlet are formed in the two ends of the LVS respectively, the LVS air outlet is higher than the LVS air inlet, and it is guaranteed that fuel can flow back into the fuel tank. The wave-proof plate is arranged in the high-pressure fuel tank system with the zero shaking leakage rate, so that the shaking amplitude and frequency of fuel oil caused by acceleration, braking and bumping processes of a vehicle can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure fuel tanks, in particular to a zero-sway leakage high-pressure fuel tank system. Background Art

[0002] The automotive high-pressure fuel tank system is a fuel tank system used by plug-in hybrid electric vehicles and extended-range electric vehicles to meet HC compound emission regulations. High-pressure fuel tank systems usually use FTIV to isolate the fuel tank from the atmosphere. The FTIV is only opened for safety reasons and when refueling, so the fuel vapor in the tank cannot be discharged into the atmosphere, reducing HC compound pollution.

[0003] In order to ensure smooth exhaust during pressure relief, the existing high-pressure fuel tank system has a higher ventilation flow design for FLVV and GVV than that for normal-pressure fuel tanks. During vehicle acceleration, braking and bumping, the fuel in the tank is more likely to leak through the valve into the ventilation line and then into the charcoal canister, increasing the risk of damage to the charcoal canister. Utility Model Content

[0004] The utility model aims to provide a zero-sway leakage high-pressure fuel tank system to solve the problem raised in the above-mentioned background technology that in order to ensure smooth exhaust during pressure relief, the ventilation flow design of FLVV and GVV of the high-pressure fuel tank system on the market is higher than that of the normal pressure tank. During the acceleration, braking and bumping of the vehicle, the fuel in the tank is more likely to leak through the valve into the ventilation line and then into the charcoal canister, increasing the risk of damage to the charcoal canister.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a zero-sloshing leakage high-pressure fuel tank system, comprising a fuel tank body, an upper shell and a lower shell are provided on the fuel tank body, a fuel pump assembly is installed on the upper end of the upper shell, and a fuel supply pipe assembly is also installed on the upper shell, a pipe clamp is connected to the fuel supply pipe assembly, and a FTIV is commonly provided on the sides of the upper shell and the lower shell, a first wave-breaking plate and a second wave-breaking plate are installed in the fuel tank body, and a LV with a maze structure inside is also provided on the outside of the fuel tank body S, and LVS air inlet and LVS air outlet are respectively provided at both ends of the LVS, and the LVS air outlet is higher than the LVS air inlet to prevent liquid fuel from directly flowing out to the charcoal canister, and the other end of the pipeline where the LVS air inlet is located is provided with a FLVV air outlet, and the FLVV air outlet is connected to the fuel pump assembly, and the LVS air inlet is higher than the FLVV air outlet, so that the liquid fuel can naturally flow back into the fuel tank body, and the LVS is fixed to the upper shell of the fuel tank through an LVS bracket, and the LVS bracket is welded to the upper shell.

[0006] Preferably, the upper shell is welded with a first bracket, a second bracket, a third bracket, a fourth bracket, a fifth bracket and an LVS bracket, and shock-absorbing pads are pasted at intervals on the upper end of the upper shell, and the LVS is clamped to the upper shell through the LVS bracket.

[0007] Preferably, a FTIV bracket is provided on the side of the third bracket, and a single-strand rivet penetrates between the FTIV bracket and the third bracket.

[0008] Preferably, a FTIV shock-absorbing pad is provided on the FTIV bracket, and the FTIV is installed on the FTIV bracket, and the side surface of the FTIV is arranged in contact with the FTIV shock-absorbing pad.

[0009] Preferably, the FTIV mounting hole is provided with a rubber lining and a metal lining, and the FTIV is fixed to the FTIV bracket by a nut.

[0010] Preferably, a single pipe clamp is clamped on the fourth bracket, and the air outlet pipe of the LVS is clamped and fixed to the single pipe clamp.

[0011] Preferably, the pipe clamp is fixedly connected to the fifth bracket, and the oil supply pipe assembly is fixedly connected to the pipe clamp.

[0012] Preferably, a fixing ring is welded to the upper end of the upper shell at the fuel pump assembly, and a locking ring is clamped on the fixing ring, and a sealing ring is provided between the locking ring and the fixing ring.

[0013] Preferably, a metal refueling port is installed on the outer side of the lower shell, and an ICV connected to the metal refueling port is provided in the lower shell.

[0014] Preferably, welding studs are welded to the inner bottom of the lower shell and the inner upper end of the upper shell respectively, the first wave-breaking plate and the second wave-breaking plate are L-shaped structures respectively, and the first wave-breaking plate and the second wave-breaking plate are respectively penetrated by the welding studs of the lower shell and the upper shell, and effective torque nuts are tightened and fixed on the welding studs respectively.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: a wave-breaking plate is provided in the zero-sway leakage high-pressure fuel tank system, which can reduce the amplitude and frequency of fuel sway caused by vehicle acceleration, braking and bumping. The zero-sway leakage high-pressure fuel tank system enables the LVS to be fixed on the fuel tank through the LVS bracket, and the LVS air outlet is higher than the LVS air inlet, so as to prevent the liquid fuel in the LVS from flowing directly into the carbon canister. A maze is designed inside the LVS to prevent the liquid fuel collected by the LVS from entering the carbon canister through the air outlet under the action of the airflow, and the LVS air inlet is higher than the FLVV air outlet on the fuel pump, so as to ensure that the liquid fuel in the LVS can naturally flow back into the fuel tank, so as to prevent the liquid fuel from overflowing into the carbon canister after filling the LVS. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a zero-sloshing leakage high-pressure fuel tank system of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of a fuel tank body of a zero-sloshing leakage high-pressure fuel tank system of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of a wave-breaking plate in a fuel tank of a zero-sloshing leakage high-pressure fuel tank system of the utility model;

[0019] Figure 4 This utility model is a zero-sloshing leakage high-pressure fuel tank system Figure 3 The enlarged structural diagram at A in the middle;

[0020] Figure 5 It is a schematic diagram of the connection structure between the LVS and the upper shell of a zero-slosh leakage high-pressure fuel tank system of the utility model;

[0021] Figure 6 This is a front view of a fuel tank body of a zero-sloshing leakage high-pressure fuel tank system of the utility model;

[0022] Figure 7 This is a back view of a fuel tank body of a zero-slosh leakage high-pressure fuel tank system of the utility model;

[0023] Figure 8 It is a top view of a fuel tank body of a zero-sloshing leakage high-pressure fuel tank system of the utility model;

[0024] Fig. 9 It is a side view of a fuel tank body of a zero-slosh leakage high-pressure fuel tank system of the utility model;

[0025] Fig.10 This is a schematic diagram of the installation structure of a wave-breaking plate of a zero-sloshing leakage high-pressure fuel tank system of the utility model;

[0026] Fig.11 This is a schematic diagram of the LVS internal structure of a zero-slosh leakage high-pressure fuel tank system of the utility model.

[0027] In the figure: 1, fuel tank body; 102, upper shell; 103, lower shell; 104, first bracket; 105, metal fuel filler port; 106, second bracket; 107, single pipe clamp; 108, third bracket; 109, FTIV bracket; 1010, shock pad; 1011, fourth bracket; 1012, LVS bracket; 1013, LVS; 1014, locking ring; 1015, fixing ring; 1016, FTIV shock pad; 1017, single rivet; 101 8. Rubber lining; 1019. Nut; 1020. Metal lining; 1021. ICV; 1022. Effective torque nut; 1023. Welding stud; 1024. First wave-breaking plate; 1025. Sealing ring; 1026. Pipe clamp; 1027. Fifth bracket; 1028. Second wave-breaking plate; 1029. LVS air inlet; 1030. LVS air outlet; 1031. FLVV air outlet; 2. Fuel supply pipe assembly; 3. Fuel pump assembly; 4. FTIV. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-11The utility model provides a technical solution: a zero-sway leakage high-pressure fuel tank system, including a fuel tank body 1, an upper shell 102 and a lower shell 103 are provided on the fuel tank body 1, a first bracket 104, a second bracket 106, a third bracket 108, a fourth bracket 1011, a fifth bracket 1027 and an LVS bracket 1012 are welded on the upper shell 102, and shock-absorbing pads 1010 are also pasted at intervals on the upper end of the upper shell 102, and the shock-absorbing pads 1010 are used for seismic isolation treatment of the fuel tank body 1, and the LVS bracket is connected with the LVS1013 by clamping, so as to realize the installation and fixing treatment of the LVS1013, and a FTIV bracket 109 is provided on the side of the third bracket 108, and the FTIV bracket 109 and the third bracket A single-strand rivet 1017 runs through the frame 108. This structure allows the FTIV bracket 109 to be firmly positioned relative to the upper shell 102 through the third bracket 108, and the FTIV bracket 109 is installed and fixed by the single-strand rivet 1017. The FTIV bracket 109 is provided with a FTIV shock-absorbing pad 1016, and the FTIV is installed on the FTIV bracket 109, and the side of the FTIV is in contact with the FTIV shock-absorbing pad 1016. This structure can reduce the shaking of the FTIV through the FTIV shock-absorbing pad 1016. The FTIV mounting hole is provided with a rubber lining 1018 and a metal lining 1020. The FTIV is fixed to the FTIV bracket by a nut 1019. This structure allows the FTIV to be The upper shell 102 is subjected to shock-absorbing installation treatment through the rubber lining 1018, the fuel pump assembly 3 is installed on the upper end of the upper shell 102, and the fuel supply pipe assembly 2 is also installed on the upper shell 102, the fuel supply pipe assembly 2 is connected with a pipe clamp 1026, the pipe clamp 1026 is fixedly connected with the fifth bracket 1027, and the fuel supply pipe assembly 2 is fixedly connected with the pipe clamp 1026. This structure allows the fuel supply pipe assembly 2 to be positioned through the cooperation of the pipe clamp 1026 and the fifth bracket 1027, and the upper shell 102 and the lower shell 103 are jointly provided with FTIV on the side, and a fixing ring 1015 is welded at the upper end of the upper shell 102 at the fuel pump assembly 3, and a locking ring 1014 is clamped on the fixing ring 1015, and a pad is provided between the locking ring 1014 and the fixing ring 1015. The sealing ring 1025, this structure allows the fuel pump assembly 3 to be locked and fixed through the cooperation of the locking ring 1014 and the fixing ring 1015, and the sealing ring 1025 is used to seal and prevent leakage. The first wave-breaking plate 1024 and the second wave-breaking plate 1028 are installed in the fuel tank body 1, and the outer side of the fuel tank body 1 is also provided with an LVS1013 with an internal labyrinth structure, and LVS air inlet 1029 and LVS air outlet 1030 are respectively provided at both ends of the LVS1013, and the LVS air outlet 1030 is higher than the LVS air inlet 1029 to prevent liquid fuel from flowing directly into the carbon canister. The fourth bracket 1011 is clamped with a single pipe clamp 107, and the air outlet pipe of the LVS1013 is clamped and fixed with the single pipe clamp 107.This structure enables the air outlet pipe of LVS1013 to be positioned through the cooperation of the single pipe clamp 107 and the fourth bracket 1011. The other end of the pipe where the LVS air inlet 1029 is located is provided with a FLVV air outlet 1031, and the FLVV air outlet 1031 is connected to the fuel pump assembly 3, and the LVS air inlet 1029 is higher than the FLVV air outlet 1031, so that the liquid fuel can naturally flow back into the fuel tank body 1. The LVS1013 is fixed to the upper shell of the fuel tank through the LVS bracket 1012, and the LVS bracket 1012 is welded to the upper shell 102. A metal refueling port 105 is installed on the outer side of the lower shell 103, and an ICV1021 connected to the metal refueling port 105 is provided in the lower shell 103. This structure enables the fuel tank body The body 1 can be refueled through the pipeline formed by the metal refueling port 105 and the ICV1021. The inner bottom of the lower shell 103 and the inner upper end of the upper shell 102 are respectively welded with welding studs 1023. The first wave-breaking plate 1024 and the second wave-breaking plate 1028 are L-shaped structures, and the first wave-breaking plate 1024 and the second wave-breaking plate 1028 are respectively set through the welding studs 1023 of the lower shell 103 and the upper shell 102, and the effective torque nuts 1022 are respectively tightened and fixed on the welding studs 1023. This structure fixes the first wave-breaking plate 1024 and the second wave-breaking plate 1028 on the upper shell 102 and the lower shell 103, respectively, to reduce the amplitude and frequency of fuel sloshing, and ensure that the wave-breaking plates work from 0 to 100% liquid level.

[0030] Working principle: When using the zero-slosh leakage high-pressure fuel tank system, first, the fuel pump assembly 3 is fixed to the upper shell 102 through the cooperation of the fixing ring 1015, the locking ring 1014 and the sealing ring 1025, and the fuel supply pipe assembly 2 connected to the fuel pump assembly 3 is positioned relative to the upper shell 102 through the cooperation of the pipe clamp 1026 and the fifth bracket 1027. The LVS1013 is welded and fixed to the upper shell 102 by the LVS bracket 1012. The LVS1013 outlet pipe is positioned relative to the upper shell 102 through the cooperation of the single pipe clamp 107 and the fourth bracket 1011. The LVS1013 intake pipe is connected to the fuel pump assembly 3, so that the fuel pump assembly 3 discharges the gas through the intake pipe to the LVS intake port 1029 through the FLVV outlet 1031, and then the labyrinth structure in the LVS1013 allows the gas to be discharged from the LVS outlet 1030 through the exhaust port, and the liquid fuel returns to the fuel pump assembly 3. The fuel flows into the fuel tank body 1, the FTIV bracket 109 is fixed to the third bracket 108 by a single-strand rivet 1017, the FTIV is fixed to the FTIV bracket 109 by a stud, and the rubber liner 1018, the nut 1019 and the metal liner 1020 are used for shock-absorbing installation, and the FTIV shock-absorbing pad 1016 is used to perform shock-absorbing isolation between the FTIV and the fuel tank body 1, the fuel tank body 1 is welded and fixed to the first bracket 104, the second bracket 106, the third bracket 108, the fourth bracket 1011, the fifth bracket 1027 and the LVS bracket 1012, and the shock-absorbing pad 1010 is used for shock-absorbing installation, the first wave-breaking plate 1024 and the second wave-breaking plate 1028 are respectively installed on the lower shell 103 and the upper shell 102 by the cooperation of the effective torque nut 1022 and the welding stud 1023, so as to reduce the amplitude and frequency of fuel sloshing, ICV 1021 and the metal refueling port 105 cooperate to form a fuel inlet, allowing the fuel to enter the fuel tank body 1, thereby completing a series of tasks.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A zero-slosh leakage high-pressure fuel tank system, comprising a fuel tank body (1), characterized in that: The fuel tank body (1) is provided with an upper shell (102) and a lower shell (103), the upper end of the upper shell (102) is provided with a fuel pump assembly (3), and the upper shell (102) is also provided with a fuel supply pipe assembly (2), the fuel supply pipe assembly (2) is connected with a pipe clamp (1026), and the upper shell (102) and the lower shell (103) are provided with a FTIV (4) on their sides, the fuel tank body (1) is provided with a first wave-breaking plate (1024) and a second wave-breaking plate (1028), and the fuel tank body (1) is also provided with an LVS (1013) with a labyrinth structure inside on the outside of the fuel tank body (1), and LVS air inlets (1029) are provided at both ends of the LVS (1013) and an LVS air outlet (1030), and the LVS air outlet (1030) is higher than the LVS air inlet (1029) to prevent liquid fuel from directly flowing out to the charcoal canister; the other end of the pipeline where the LVS air inlet (1029) is located is provided with an FLVV air outlet (1031), and the FLVV air outlet (1031) is communicated with the fuel pump assembly (3), and the LVS air inlet (1029) is higher than the FLVV air outlet (1031), so that the liquid fuel can naturally flow back into the fuel tank body (1); the LVS (1013) is fixed to the upper shell of the fuel tank through an LVS bracket (1012), and the LVS bracket (1012) is welded to the upper shell (102).

2. A zero-slosh leakage high-pressure fuel tank system according to claim 1, characterized in that: A first bracket (104), a second bracket (106), a third bracket (108), a fourth bracket (1011), a fifth bracket (1027) and an LVS bracket (1012) are welded on the upper shell (102), and a shock-absorbing pad (1010) is also pasted at intervals on the upper end of the upper shell (102), and the LVS (1013) is clamped to the upper shell (102) via the LVS bracket (1012).

3. A zero-slosh leakage high-pressure fuel tank system according to claim 2, characterized in that: A FTIV bracket (109) is provided on the side of the third bracket (108), and a single-strand rivet (1017) penetrates between the FTIV bracket (109) and the third bracket (108).

4. A zero-slosh leakage high-pressure fuel tank system according to claim 3, characterized in that: The FTIV bracket (109) is provided with an FTIV shock-absorbing pad (1016), and the FTIV (4) is installed on the FTIV bracket (109), and the side surface of the FTIV (4) is in contact with the FTIV shock-absorbing pad (1016).

5. A zero-slosh leakage high-pressure fuel tank system according to claim 2, characterized in that: The FTIV (4) mounting hole is provided with a rubber lining (1018) and a metal lining (1020), and the FTIV (4) is fixed to the FTIV bracket via a nut (1019).

6. A zero-slosh leakage high-pressure fuel tank system according to claim 2, characterized in that: The fourth bracket (1011) is clamped with a single pipe clamp (107), and the air outlet pipe of the LVS (1013) is clamped and fixed to the single pipe clamp (107).

7. A zero-slosh leakage high-pressure fuel tank system according to claim 2, characterized in that: The pipe clamp (1026) is clamped and fixed to the fifth bracket (1027), and the oil supply pipe assembly (2) is clamped and fixed to the pipe clamp (1026).

8. The zero-slosh leakage high-pressure fuel tank system according to claim 1, characterized in that: A fixing ring (1015) is welded to the upper end of the upper shell (102) at the fuel pump assembly (3), a locking ring (1014) is clamped on the fixing ring (1015), and a sealing ring (1025) is provided between the locking ring (1014) and the fixing ring (1015).

9. A zero-slosh leakage high-pressure fuel tank system according to claim 1, characterized in that: A metal refueling port (105) is installed on the outer side of the side of the lower shell (103), and an ICV (1021) connected to the metal refueling port (105) is arranged inside the lower shell (103).

10. The zero-slosh leakage high-pressure fuel tank system according to claim 1, characterized in that: The inner bottom of the lower shell (103) and the inner upper end of the upper shell (102) are respectively welded with welding studs (1023); the first wave-breaking plate (1024) and the second wave-breaking plate (1028) are respectively L-shaped structures, and the first wave-breaking plate (1024) and the second wave-breaking plate (1028) are respectively arranged to penetrate the welding studs (1023) of the lower shell (103) and the upper shell (102), and effective torque nuts (1022) are respectively tightened and fixed on the welding studs (1023).

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