Oil-gas shock absorption system for vehicle fuel tank

Abstract

An oil-gas damping system for a vehicle fuel tank. The pressure sensor A in this system is used to transmit the pressure value of the oil and gas generated in the fuel tank to the control unit. When the pressure in the fuel tank reaches the preset pressure value, the control unit sends an opening instruction to the solenoid valve A and the solenoid valve B. The oil and gas enter the damping device through the check valve A, generating air pressure in the cylinder body of the damping device, enabling the damping device to have a certain compression damping function. This oil-gas damping method attenuates the fuel tank shaking when the vehicle is driving under different working conditions, reduces the stress concentration generated by the oil fluid, improves the reliability of the fuel tank installation, and can reduce the noise caused by the oil fluid shaking during vehicle operation, improving the comfort of vehicle driving or riding; A piezoelectric plate, a spring and a piston are installed in the cylinder body of the damping device in this system to form a piezoelectric device, which can convert the mechanical energy generated by the fuel tank shaking into electrical energy and store it in the storage battery to supply power to the entire system.

Description

Technical Field

[0001] The present invention relates to the field of fuel tank vibration damping, and particularly to an oil-gas vibration damping system for a vehicle-mounted fuel tank. Background Art

[0002] The fuel tank is an indispensable component of traditional automobiles and hybrid electric vehicles, used to store power fuel, and its safety is very important. Currently, the fuel tank is usually fixedly installed on the vehicle chassis by metal straps, and a vibration damping pad is provided at the connection between the metal straps and the fuel tank.

[0003] The purpose is to reduce the vibration amount of the fuel tank during vehicle driving. The vibration damping effect of this vibration damping method is limited. When the vehicle is driving on a bumpy road surface, the large-amplitude vibration of the fuel tank not only brings safety hazards but also causes vibration noise. Moreover, with the repeated sloshing of the oil in the fuel tank during vehicle driving, the oil not only impacts and damages the internal components of the fuel tank but also increases the amount of oil and gas volatilization.

[0004] Regarding the problem of large vibration amount of the fuel tank during vehicle driving, the patent with the publication number CN213291987U proposes a fuel tank for a vehicle with vibration damping. In order to achieve fuel tank vibration damping, this solution sets components such as a limiting rod and a vibration damping spring outside the fuel tank for vibration damping. The defect of this solution is that a large amount of oil and gas will be generated in the fuel tank during the vibration damping process, and there is a risk of oil and gas leakage due to excessive pressure in the fuel tank, which is not conducive to the safety of the fuel tank. In view of the defects of the existing fuel tank vibration damping devices, it is necessary to design a new fuel tank vibration damping system with good vibration damping effect and high safety. Summary of the Invention

[0005] In order to solve the above problems, the present invention proposes an oil-gas vibration damping system for a vehicle-mounted fuel tank.

[0006] The technical solution of the present invention is: an oil-gas vibration damping system for a vehicle-mounted fuel tank, including a fuel tank, a support device, a vibration damping system, and a control system; the support device includes a left base fixedly connected below the left longitudinal beam through an outer support member and a right base fixedly connected below the right longitudinal beam through an outer support member. The fuel tank is installed between the left base and the right base. One side of the top of the fuel tank is connected to the left longitudinal beam through an inner support member, and the other side is connected to the right longitudinal beam through an inner support member.

[0007] The shock absorption system includes a left shock absorber, a lower left shock absorber, a right shock absorber, a lower right shock absorber and a buffer pad. The structures of each shock absorber are the same; the buffer pad is arranged at the connection between the inner support and the fuel tank. The left shock absorber is installed between the left base and the left side of the fuel tank. The lower left shock absorber is installed between the left base and the left bottom surface of the fuel tank. The top of the fuel tank is connected with a left oil-gas main pipe that leads into the left shock absorber. A check valve A is installed on the upper part of the left oil-gas main pipe. And the left oil-gas main pipe is connected with an air pump through a pipeline. The middle part of the left oil-gas main pipe is connected with a left oil-gas branch pipe that leads into the lower left shock absorber. The right shock absorber and the lower right shock absorber are installed between the right base and the fuel tank, and the installation method is the same as that of the left shock absorber and the lower left shock absorber.

[0008] The control system includes a control unit, a storage battery, a pressure sensor A, a solenoid valve A, and a solenoid valve B. The pressure sensor A is fixed on the top plate inside the fuel tank. The solenoid valve A is installed on the left oil-gas main pipe. The solenoid valve B is installed on the left oil-gas branch pipe. The air pump, the pressure sensor A, the solenoid valve A and the solenoid valve B are all connected to the control unit through signal lines. The storage battery is connected to the control unit through a wire; there is a solenoid valve on the right oil-gas main pipe in the right shock absorber, and there is a solenoid valve on the right oil-gas branch pipe in the lower right shock absorber. The solenoid valves are connected to the control unit through signal lines.

[0009] Preferably, piezoelectric plates A and B are respectively slidably installed at both ends of the cylinder body of the left shock absorber. The piezoelectric plate A is attached to the side plate of the left base, and the piezoelectric plate B is attached to the outer wall of the fuel tank. A piston A and a piston B are slidably sleeved in the cylinder body. Springs are arranged between the piston A and the piezoelectric plate A and between the piston B and the piezoelectric plate A. An air inlet hole located between the piston A and the piston B is arranged in the middle of the cylinder body. The left oil-gas main pipe is hermetically connected to this air inlet hole. The left oil-gas branch pipe is hermetically connected to the air inlet hole in the lower left shock absorber. The connection method of the air inlet hole in the right shock absorber is the same as that of the air inlet hole in the left shock absorber. The connection method of the air inlet hole in the lower right shock absorber is the same as that of the air inlet hole in the lower left shock absorber.

[0010] Preferably, an energy recovery system is connected to the shock absorption system. The energy recovery system includes an intermediate conversion circuit connected to the storage battery through a wire. The piezoelectric plates in the left shock absorber, the lower left shock absorber, the right shock absorber and the lower right shock absorber are all connected to the intermediate conversion circuit through wires.

[0011] Preferably, the energy recovery system also includes an air tank, a filter, an intake pipe, and an air flow meter. The cylinder ends of the left vibration damping device, the left lower vibration damping device, the right vibration damping device, and the right lower vibration damping device are all provided with exhaust holes, and each exhaust hole is connected to the air tank through an oil and gas recovery pipe. A one-way valve B is installed on each oil and gas recovery pipe. The air tank is provided with an oil and gas discharge pipe connected to the intake pipe, the filter is connected to the oil and gas discharge pipe, and an electromagnetic valve C is installed on the oil and gas discharge pipe. The air flow meter is installed on the intake pipe.

[0012] Preferably, the solenoid valve C and the air flow meter are both connected to the control unit via signal lines, and a pressure sensor B is installed in the air storage tank, and the pressure sensor B is connected to the control unit via a signal line.

[0013] Preferably, the left longitudinal beam and the right longitudinal beam have the same structure. The left longitudinal beam includes two symmetrically arranged channel steel beams. The openings of the two channel steel beams are welded together. The inner support is fixed to the inner side of the left longitudinal beam by bolts, and the outer support is fixed to the outer side of the left longitudinal beam by bolts.

[0014] The beneficial technical effects of the present invention are:

[0015] (1) The pressure sensor A in this system is used to transmit the pressure value of the oil and gas generated in the fuel tank to the control unit. When the pressure in the fuel tank reaches the preset pressure value, the control unit sends an opening command to the solenoid valve A and the solenoid valve B. The oil and gas enter the vibration damping device through the one-way valve A, and generate air pressure in the cylinder of the vibration damping device, so that the vibration damping device has a certain compression vibration damping function. This oil and gas vibration damping method attenuates the amount of oil tank shaking when the car is driving under different working conditions, reduces the stress concentration caused by the oil, improves the reliability of the fuel tank installation, and can reduce the noise caused by oil shaking during the operation of the car, thereby improving the comfort of the car.

[0016] (2) The lower left and lower right vibration damping devices in the system are used to overcome the vertical vibration force of the fuel tank, and the left and right vibration damping devices are used to overcome the horizontal vibration force of the fuel tank. Therefore, when the oil in the fuel tank impacts the side wall of the fuel tank and causes the fuel tank to shake, each vibration damping device can provide all-round vibration damping for the fuel tank at the bottom, greatly improving the vibration damping effect of the fuel tank.

[0017] (3) A piezoelectric plate, a spring, and a piston are installed in the cylinder of the vibration damping device in this system to form a piezoelectric device. This device can convert the mechanical energy generated by the shaking of the oil tank into electrical energy and store it in a battery to power the entire system.

[0018] (4) Each shock absorber of the system is connected to the gas storage tank through an oil and gas recovery pipe. During the shock absorption process of the shock absorber, the oil and gas will continuously squeeze the piston. When the outward movement of the piston is too large, the oil and gas will enter the gas storage tank through the check valve in the oil and gas recovery pipe, realizing the storage and reuse of the oil and gas. Description of the Drawings

[0019] Figure 1 is the system diagram of the present invention (the specific structure of each shock absorber is shown in the lower part of the system diagram, and the connection relationships of the signal line, wire and each shock absorber are specifically shown, aiming to clearly show the specific connection relationships of the control system, energy recovery system and each shock absorber);

[0020] Figure 2 is Figure 1 a partial view of.

[0021] In the figure, 11. fuel tank, 12. left longitudinal beam, 121. left base, 122. outer support member, 123. inner support member, 124. bolt, 13. left shock absorber, 14. lower left shock absorber, 151. piezoelectric plate A, 152. piezoelectric plate B, 153. piston A, 154. piston B, 155. spring, 156. cylinder block, 157. buffer pad, 161. left main oil and gas pipe, 162. left oil and gas branch pipe, 163. check valve A, 17. control unit, 171. storage battery, 172. pressure sensor A, 173. solenoid valve A, 174. solenoid valve B, 175. signal line, 176. air flow meter, 177. pressure sensor B, 178. solenoid valve C, 18. intermediate conversion circuit, 181. wire, 182. gas storage tank, 183. filter, 184. intake pipe, 185. check valve B, 186. oil and gas recovery pipe, 191. oil liquid, 192. oil and gas, 20 air pump. Detailed Embodiment

[0022] Embodiment 1, see the attached drawings of the specification Figure 1 - 2, an oil and gas shock absorption system for a vehicle-mounted fuel tank, comprising a fuel tank 11, a support device, a shock absorption system, and a control system; the support device includes a left base 121 fixedly connected to the lower part of the left longitudinal beam 12 through an outer support member 122, and a right base fixedly connected to the lower part of the right longitudinal beam through an outer support member 122. The fuel tank 11 is installed between the left base 121 and the right base. One side of the top of the fuel tank 11 is connected to the left longitudinal beam 12 through an inner support member 123, and the other side is connected to the right longitudinal beam through an inner support member 123;

[0023] The vibration reduction system includes a left vibration reduction device 13, a left lower vibration reduction device 14, a right vibration reduction device, a right lower vibration reduction device and a buffer pad 157. The structures of the various vibration reduction devices are the same; the buffer pad 157 is provided at the connection between the inner support 123 and the fuel tank 11, and the buffer pad 157 is used to buffer the pressure generated between the shaking of the fuel tank 11 and the inner support 123. The left vibration reduction device 13 is installed between the left base 121 and the left side of the fuel tank 11, and the left lower vibration reduction device 14 is installed between the left base 121 and the left bottom surface of the fuel tank 11. The top of the fuel tank 11 is connected to a left oil and gas main pipe 161 that leads into the left vibration reduction device 13. The left oil and gas main pipe 161 is connected to the left oil and gas main pipe 161 that leads to the left vibration reduction device 13. A one-way valve A163 is installed on the upper portion of the main oil and gas main pipe 161. The left oil and gas main pipe 161 is connected to the air pump 20 via a pipeline. When the oil and gas pressure in the fuel tank 11 reaches a preset value, they can flow out of the left oil and gas main pipe 161 and into the left vibration damper 13. The middle portion of the oil and gas main pipe is connected to a left oil and gas branch pipe 162 that leads to the left lower vibration damper 14. After passing through the left oil and gas main pipe 161, the oil and gas enter the left lower vibration damper 14 from the left oil and gas branch pipe 162. The right and right lower vibration dampers are installed between the right base and the fuel tank 11 in the same installation method as the left and left lower vibration dampers 13 and 14.

[0024] The control system includes a control unit 17, a battery 171, a pressure sensor A172, a solenoid valve A173, and a solenoid valve B174. The pressure sensor A172 is fixed to the top plate inside the fuel tank 11 and is used to transmit the oil and gas pressure signal in the fuel tank 11 to the control unit 17. The solenoid valve A173 is installed on the left oil and gas main pipe 161, and the solenoid valve B174 is installed on the left oil and gas branch pipe 162. The two solenoid valves control the opening and closing of the two oil and gas pipelines and are used to transport oil and gas to the vibration reduction device. The air pump 20 and the pressure sensor A172, solenoid valve A173 and solenoid valve B174 are all connected to the control unit 17 through the signal line 175. The pressure sensor and the solenoid valve are controlled by the control unit 17 to realize automatic control of the system operation. The battery 171 is connected to the control unit 17 through the wire 181, and the battery 171 provides power for the entire system; a solenoid valve is provided on the right oil and gas main pipe in the right shock absorber device, and a solenoid valve is provided on the right oil and gas branch pipe in the lower right shock absorber device. The solenoid valve is connected to the control unit 17 through the signal line 175.

[0025] Piezoelectric plate A151 and piezoelectric plate B152 are slidably mounted at both ends of the cylinder block 156 of the left shock absorber device 13. Piezoelectric plate A151 is attached to the side plate of the left base 121, and piezoelectric plate B152 is attached to the outer wall of the fuel tank 11. A piston A153 and a piston B154 are slidably sleeved in the cylinder block 156. Springs 155 are provided between piston A153 and piezoelectric plate A151 and between piston B154 and piezoelectric plate A151. The springs 155 provide elastic support between the piezoelectric plates and the pistons. An air inlet hole is provided in the middle of the cylinder block 156 between piston A153 and piston B154. Oil and gas enter between the two pistons through this air inlet hole. When the two pistons are pressed, they will compress the oil and gas. The springs 155 and the oil and gas enable the shock absorber device to have a shock absorption function. The left oil and gas main pipe 161 is hermetically connected to this air inlet hole, and the left oil and gas branch pipe 162 is hermetically connected to the air inlet hole in the lower left shock absorber device 14. The air inlet hole in the lower left shock absorber device 14 is hermetically connected to the left oil and gas branch pipe 162. The connection method of the air inlet hole in the right shock absorber device is the same as that of the air inlet hole in the left shock absorber device, and the connection method of the air inlet hole in the lower right shock absorber device is the same as that of the air inlet hole in the lower left shock absorber device.

[0026] An energy recovery system is connected to the shock absorption system. The energy recovery system includes an intermediate conversion circuit 18 connected to a storage battery 171 through a wire 181. The piezoelectric plates in the left shock absorber device 13, the lower left shock absorber device 14, the right shock absorber device, and the lower right shock absorber device are all connected to the intermediate conversion circuit 18 through the wire 181. When the piezoelectric plates are pressed, electrical energy is generated, and the electrical energy is transmitted to the intermediate conversion circuit 18 through the wire 181, rectified and regulated, and then stored in the storage battery 171.

[0027] The energy recovery system further includes an air storage tank 182, a filter 183, an intake pipe 184, and an air flow meter 176. Exhaust holes are provided at the ends of the cylinder blocks 156 of the left shock absorber 13, the lower left shock absorber 14, the right shock absorber, and the lower right shock absorber. Each exhaust hole is connected to the air storage tank 182 through an oil and gas recovery pipe 186. A check valve B185 is installed on each oil and gas recovery pipe 186. During the shock absorption process of the shock absorber, the oil and gas continuously squeeze the piston. When the outward movement of the piston is too large, the oil and gas will enter the air storage tank 182 through the check valve in the oil and gas recovery pipe 186, realizing the storage and reuse of the oil and gas. An oil and gas discharge pipe connected to the intake pipe 184 is provided on the air storage tank 182. The filter 183 is connected to this oil and gas discharge pipe. After filtering the oil and gas through the filter 183, it is sent into the exhaust pipe, and a solenoid valve C178 is installed on the oil and gas discharge pipe. The air flow meter 176 is installed on the intake pipe 184. Both the solenoid valve C178 and the air flow meter 176 are connected to the control unit 17 through signal lines 175. The intake pipe 184 is connected to the vehicle engine, so that the filtered oil and gas can be sent into the engine for reuse. The air flow meter 176 is used to give a signal indicating whether the engine is intake air, and feeds back the signal to the control unit 17 to control the opening of the solenoid valve C178, and the oil and gas in the air storage tank 182 enters the intake pipe 184. A pressure sensor B177 is installed in the air storage tank 182. The pressure sensor B177 is connected to the control unit 17 through a signal line 175, and transmits the pressure signal in the air storage tank 182 to the control unit 17 through the pressure sensor B177.

[0028] The left longitudinal beam 12 and the right longitudinal beam have the same structure. The left longitudinal beam 12 includes two symmetrically arranged channel steel beams. The openings of the two channel steel beams face each other and are welded together. The inner support member 123 is fixed to the inner side of the left longitudinal beam 12 through a bolt 124, and the outer support member 122 is fixed to the outer side of the left longitudinal beam 12 through a bolt 124.

[0029] The shock absorption principle and process of the fuel tank 11 of the present invention will be described below, taking the left shock absorber 13 and the lower left shock absorber 14 as examples.

[0030] The vibration damping principle of the present invention is as follows: under the influence of the external environment, the oil and gas molecules in the fuel tank 11 will slowly escape from the free liquid surface of the oil, and the amount of oil and gas in the space above the fuel tank 11 will gradually increase. When the pressure sensor A172 detects that the pressure in the fuel tank 11 reaches the preset value, the control unit 17 sends an opening instruction to the solenoid valve A173 and the solenoid valve B174. The oil and gas above the fuel tank 11 enter the left vibration damping device 13 through the one-way valve and the left oil and gas main pipe 161, and enter the lower left vibration damping device 14 through the left oil and gas branch pipe 162. Oil and gas with a certain pressure enter the cylinder block 156 of the left vibration damping device 13 and the lower left vibration damping device 14, and the oil and gas enable the vibration damping device to generate a compression vibration damping function. As the oil and gas continuously enter and exit the vibration damping device, there will be a problem of insufficient pressure in the left oil and gas main pipe 161, resulting in insufficient damping generated by the oil and gas in the vibration damping device. At this time, the control unit 17 sends an opening instruction to the air pump 20, and the air pump 20 pumps air into the left oil and gas main pipe 161 to increase the pressure in the pipeline, so that the oil and gas can continuously enter the vibration damping device to provide sufficient pressure.

[0031] The vibration damping process of each vibration damping device of the present invention for the fuel tank 11 is as follows: when the vehicle is in an accelerating or braking condition, the oil liquid reciprocally sloshes in the fuel tank 11 under the action of its own gravity and inertia force. When the inertial force of the oil liquid is greater than the gravity, it will impact the left side wall surface of the fuel tank 11. The left side wall surface laterally squeezes the piezoelectric plate B152 of the left vibration damping device 13 under the action of the impact force. The piezoelectric plate B152 overcomes the elastic potential energy of the inner spring 155 and pushes the piston B154 to move outward. The oil and gas in the cylinder block 156 push the piston A153 under the extrusion of the piston B154. The piston A153 overcomes the potential energy of the outer spring 155 under the extrusion of the oil and gas and moves outward in the cylinder block 156. At the same time, the outer spring 155 squeezes the piezoelectric plate A151. Since the compressed oil and gas in the cylinder block 156 attenuate the impact force of the oil liquid in this process, horizontal vibration damping of the fuel tank 11 is achieved. In addition, when the sloshing oil liquid squeezes the left side wall surface of the fuel tank 11, the accumulated oil liquid impacts the lower left bottom surface of the fuel tank 11 under the action of its own gravity. The lower left bottom surface vertically squeezes the piezoelectric plate B152 of the lower left vibration damping device 14. The piezoelectric plate B152 overcomes the elastic potential energy of the upper spring 155 and moves vertically downward. The upper spring 155 pushes the piston B154 to squeeze the oil and gas downward. The squeezed oil and gas overcomes the elastic potential energy of the lower spring 155 and pushes the piston A153 to move downward, thereby achieving vertical vibration damping of the fuel tank 11.

[0032] The energy recovery and oil and gas reuse process of the present invention is as follows: When the fuel tank 11 shakes and squeezes the piezoelectric plate, the piezoelectric plate generates electrical energy and stores it in the storage battery 171 through the wire 181, converting the mechanical energy generated by the shaking of the fuel tank 11 into electrical energy to supply power to the entire system. Moreover, when the oil and gas are compressed, they continuously squeeze the piston. When the piston moves outwards too much, the oil and gas enter the gas storage tank 182 through the check valve in the oil and gas recovery pipe 186, realizing the storage and reuse of the oil and gas.

Claims

1. An oil-gas shock absorption system for a vehicle fuel tank, characterized in that: It includes a fuel tank, a support device, and a shock absorption system; The support device includes a left base fixedly connected below the left longitudinal beam and a right base fixedly connected below the right longitudinal beam. The fuel tank is installed between the left base and the right base. One side of the top of the fuel tank is connected to the left longitudinal beam, and the other side is connected to the right longitudinal beam; The shock absorption system includes a left shock absorber, a left lower shock absorber, a right shock absorber, a right lower shock absorber, and a buffer pad. The structures of each shock absorber are the same; the buffer pad is provided at the connection between the inner support member and the fuel tank. The left shock absorber is installed between the left base and the left side of the fuel tank. The left lower shock absorber is installed between the left base and the left bottom of the fuel tank. A left oil-gas main pipe leading into the left shock absorber is connected to the top of the fuel tank. A check valve A is installed on the upper part of the left oil-gas main pipe, and the left oil-gas main pipe is connected to an air pump through a pipeline. The middle part of the left oil-gas main pipe is connected to a left oil-gas branch pipe leading into the left lower shock absorber. The right shock absorber and the right lower shock absorber are installed between the right base and the fuel tank, and the installation method is the same as that of the left shock absorber and the left lower shock absorber.

2. The oil-gas shock absorption system for vehicle fuel tank according to claim 1, characterized in that: Piezoelectric plate A and piezoelectric plate B are respectively slidably installed at both ends of the cylinder body of the left shock absorber. Piezoelectric plate A is attached to the side plate of the left base, and piezoelectric plate B is attached to the outer wall of the fuel tank. A piston A and a piston B are slidably sleeved in the cylinder body. Springs are provided between piston A and piezoelectric plate A and between piston B and piezoelectric plate A. An air inlet hole is provided in the middle of the cylinder body between piston A and piston B. The left oil-gas main pipe is hermetically connected to this air inlet hole, and the left oil-gas branch pipe is hermetically connected to the air inlet hole in the left lower shock absorber. The connection method of the air inlet hole in the right shock absorber is the same as that of the air inlet hole in the left shock absorber, and the connection method of the air inlet hole in the right lower shock absorber is the same as that of the air inlet hole in the left lower shock absorber.

3. The oil-gas shock absorption system for vehicle fuel tank according to claim 1, characterized in that: A control system is provided in the oil-gas shock absorption system. The control system includes a control unit, a storage battery, a pressure sensor A, a solenoid valve A, and a solenoid valve B. The pressure sensor A is fixed on the top plate inside the fuel tank. The solenoid valve A is installed on the left oil-gas main pipe, and the solenoid valve B is installed on the left oil-gas branch pipe. The air pump, the pressure sensor A, the solenoid valve A, and the solenoid valve B are all connected to the control unit through signal lines. The storage battery is connected to the control unit through a wire; a solenoid valve is provided on the right oil-gas main pipe in the right shock absorber, and a solenoid valve is provided on the right oil-gas branch pipe in the right lower shock absorber. The solenoid valve is connected to the control unit through a signal line.

4. The oil-gas shock absorption system for vehicle fuel tank according to claim 1, characterized in that: An energy recovery system is connected to the shock absorption system. The energy recovery system includes an intermediate conversion circuit connected to the storage battery through a wire. The piezoelectric plates in the left shock absorber, the left lower shock absorber, the right shock absorber, and the right lower shock absorber are all connected to the intermediate conversion circuit through wires.

5. The oil-gas shock absorption system for vehicle fuel tank according to claim 4, characterized in that: The described energy recovery system further includes an air storage tank, a filter, an intake pipe, and an air flow meter. Exhaust holes are provided at the cylinder ends of the left shock absorber device, the lower left shock absorber device, the right shock absorber device, and the lower right shock absorber device. Each exhaust hole is communicated with the air storage tank through an oil and gas recovery pipe. A check valve B is installed on each oil and gas recovery pipe. An oil and gas discharge pipe connected to the intake pipe is provided on the air storage tank. The filter is connected to the oil and gas discharge pipe, and a solenoid valve C is installed on the oil and gas discharge pipe. The air flow meter is installed on the intake pipe.

6. The oil-gas shock absorption system for vehicle fuel tank according to claim 5, characterized in that: The solenoid valve C and the air flow meter are both connected to the control unit through signal lines. A pressure sensor B is installed in the air storage tank, and the pressure sensor B is connected to the control unit through a signal line.

7. The oil-gas shock absorption system for vehicle fuel tank according to claim 1, characterized in that: The left longitudinal beam and the right longitudinal beam have the same structure. The left longitudinal beam includes two symmetrically arranged channel steel beams. The openings of the two channel steel beams face each other and are welded together. The inner support member is fixed to the inner side of the left longitudinal beam by bolts, and the outer support member is fixed to the outer side of the left longitudinal beam by bolts.

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