Vehicle parking system

Abstract

A vehicle parking system comprises a parking air chamber and an electronic parking valve, the electronic parking valve is arranged on a flow path between the parking air chamber and a compressed air source, the electronic parking valve comprises a connecting port, the electronic parking valve can be switched between a working state and a non-working state, in the working state, the parking air chamber is communicated with the compressed air source, and in the non-working state, the parking air chamber is communicated with the compressed air source. In the working state, the compressed gas can be exhausted outwards from the parking gas chamber through the electronic parking valve to activate parking braking, and in the non-working state, the compressed gas cannot be exhausted outwards through the electronic parking valve. The redundant parking device is connected with the connecting port and is configured to allow compressed gas at the connecting port to be discharged outwards through the redundant parking device when the electronic parking valve is in a non-working state and the vehicle parking system reaches a preset threshold value; therefore, compressed air in the parking air chamber is allowed to be discharged outwards through the electronic parking valve. According to the vehicle parking system, emergency parking braking under the condition that the electronic parking valve fails is achieved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent driving vehicles, and more particularly to a vehicle parking system. Background Art

[0002] It is known that new energy vehicles such as driverless vehicles usually use a voltage system including a high-voltage system and a low-voltage system. The high-voltage system is mainly responsible for vehicle driving, charging and discharging, and power supply of high-power equipment (compressors, air pumps, etc.), while the low-voltage system supplies power to various components and circuits in the vehicle. The high-voltage system is generally powered by a DC / DC converter through a high-voltage circuit, while the low-voltage system is generally powered by a low-voltage battery through a low-voltage circuit.

[0003] In existing driverless vehicles, an electronic parking brake (EPB) system is usually used for parking brake. The EPB system can control the parking brake through circuits, which is easier to operate and safer than traditional brakes. The EPB system can normally perform parking brakes when both the high-voltage circuit and the low-voltage circuit of the vehicle are connected (for example, during normal driving), and can also use the low-voltage circuit to perform parking brakes when the high-voltage circuit is disconnected (for example, when the engine is not working).

[0004] At present, the EPB system of unmanned vehicles can start parking when receiving the parking brake request signal sent by the voltage control unit (VCU), or when the power is off in the on gear and the low voltage power is normal. For example, when the low voltage battery and DC / DC of the autonomous vehicle are working normally or only the low voltage battery is working, the parking brake can be realized.

[0005] However, vehicles using the EPB system may encounter unexpected situations while driving, such as abnormal power supply, which may be caused by a violent impact that causes a high-voltage power outage and a low-voltage power interruption. In the face of this situation, the vehicle's EPB system will not be able to perform parking brakes, and the entire vehicle will not be able to park, posing a safety hazard. In particular, for autonomous vehicles, when the low-voltage battery and DC / DC fail at the same time, the electrical signal of the entire vehicle fails, so the EPB system cannot start parking, causing the autonomous vehicle to be unable to stop or maintain a stopped state, thereby creating potential dangers.

[0006] Therefore, a parking system is currently desired that can solve or at least alleviate the problem of parking failure of an autonomous driving vehicle when the high and low voltage circuits are simultaneously powered off. Summary of the invention

[0007] In order to solve the problem of parking failure of an autonomous driving vehicle when high and low voltage circuits are powered off at the same time, the present invention provides a vehicle parking system, which can achieve emergency braking when power supply is abnormal.

[0008] Specifically, the parking system includes a parking air chamber; an electronic parking valve, which is arranged on the flow path between the parking air chamber and the compressed gas source, and the electronic parking valve includes a connection port, wherein the electronic parking valve can be switched between a working state and a non-working state, and in the working state, the compressed gas can be discharged from the parking air chamber through the electronic parking valve to the outside, thereby activating the parking brake, and in the non-working state, the compressed gas cannot be discharged to the outside through the electronic parking valve; and a redundant parking device, which is connected to the connection port of the electronic parking valve and is configured to allow the compressed gas at the connection port to be discharged to the outside through the redundant parking device when the electronic parking valve is in the non-working state and the vehicle parking system reaches a preset threshold, thereby allowing the compressed gas in the parking air chamber to be discharged to the outside through the electronic parking valve. The vehicle parking system of the present invention realizes the activation of the parking brake in the case of abnormal power supply. And the entire control process does not need to go through the vehicle control system, even if the power supply of the whole vehicle fails, the parking brake can still be effectively activated to ensure the safe parking of the vehicle.

[0009] In one embodiment of the present invention, the redundant parking device includes a two-position three-way solenoid valve, which is closed to be sealed from the atmosphere, wherein when the electronic parking valve is in a non-operating state and the vehicle parking system reaches a preset threshold, the two-position three-way solenoid valve is configured to be disconnected to communicate with the atmosphere, so that the compressed gas at the connection port is discharged to the atmosphere via the two-position three-way solenoid valve. In addition, the use of the two-position three-way solenoid valve can make the structure of the redundant parking device simpler.

[0010] Further, the two-position three-way solenoid valve has a first port, a second port and a third port, the second port is communicated with the first port, and the second port is connected to the connection port, wherein when the electronic parking valve is in a non-operating state and the vehicle parking system reaches a preset threshold, the second port is switched to communicate with the third port, and wherein the first port is blindly blocked. Thus, when the two-position three-way solenoid valve is closed, the blindly blocked first port prevents the compressed gas at the connection port from being discharged from the two-position three-way solenoid valve.

[0011] Advantageously, the two-position three-way solenoid valve is connected in series with the electronic parking valve in the circuit, so that when the electronic parking valve is in a non-operating state and the vehicle parking system reaches a preset threshold, the two-position three-way solenoid valve is automatically disconnected. The automatically disconnected solenoid valve enables the parking brake to be effectively activated even when the power supply of the entire vehicle fails, thereby improving safety.

[0012] Preferably, the vehicle parking system further comprises a power-off protection device, which is connected to the two-position three-way solenoid valve to protect the two-position three-way solenoid valve from power failure when the electronic parking valve is in operation. This avoids the problem of limited working life of the solenoid valve under normal power-on conditions, and effectively prolongs the service life of the valve.

[0013] In another embodiment of the present invention, the redundant parking device includes a connector and at least one air valve, the connector is connected to the connection port of the electronic parking valve, and the at least one air valve is connected to the connector, wherein the air valve can be operated to allow compressed gas to leave the parking air chamber. This design of the redundant parking device allows the operator to operate the air valve to discharge the compressed air at the connection port when the operator finds that the vehicle is driving abnormally, so that the parking brake can be effectively activated even when the power supply of the entire vehicle fails.

[0014] In this embodiment, the redundant parking device includes two gas valves, and the joint is a three-way joint. The operator can operate any one of the two gas valves to improve convenience.

[0015] In a specific example, the air valve includes an air inlet, an air outlet and a switch, wherein the air inlet is connected to the joint, wherein the switch can be operated to connect the air inlet with the air outlet. This design makes the operation of the air valve simple, facilitates quick start of parking, and improves safety.

[0016] Advantageously, the gas valve is arranged so that the switch is located on both sides of the vehicle. The operator can operate the button on either side of the vehicle without having to go around to one side to facilitate the operation of emergency parking.

[0017] Further, the switch can be operated to isolate the air inlet from the air outlet, thereby releasing the parking brake after the circuit returns to normal.

[0018] Additional features and advantages of the described vehicle parking system will be set forth in the detailed description that follows, and will be apparent to those skilled in the art from the following description or will be recognized by those skilled in the art from practicing the embodiments described herein, including the following detailed description and accompanying figure illustrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] With reference to the above objects, the technical features of the present invention are clearly described in the following claims, and its advantages are apparent from the following detailed description with reference to the accompanying drawings, which show preferred embodiments of the present invention by way of example without limiting the scope of the inventive concept.

[0020] Figure 1 A schematic diagram showing a first embodiment of a vehicle parking system according to the present invention is shown;

[0021] Figure 2 Shows Figure 1 A simplified schematic diagram of a vehicle parking system;

[0022] Figure 3 Shows Figure 1 A schematic diagram of a two-position three-way solenoid valve of a vehicle parking system;

[0023] Figure 4 A schematic diagram showing a second embodiment of a vehicle parking system according to the present invention;

[0024] Figure 5 Shows Figure 4 A simplified schematic diagram of a vehicle parking system; and

[0025] Figure 6 Shows Figure 3 Schematic diagram of the air valve of the vehicle parking system.

[0026] Reference numerals

[0027] 1Parking system

[0028] 10 Parking air chamber

[0029] 20 Compressed gas source

[0030] 30 Electronic parking valve

[0031] 31 Intake port

[0032] 32 First connection port

[0033] 33 Second connection port

[0034] 34 ports

[0035] 35 Exhaust Port

[0036] 40 two-position three-way solenoid valve

[0037] 41 First Opening

[0038] 42 Second opening

[0039] 43 The third opening

[0040] 50 connector

[0041] 60 Valve

[0042] 61 Air Inlet

[0043] 62 outlet

[0044] 63 Switch DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention in any way.

[0046] The term "circuit" used herein refers to a circuit in which the electric parking valve is connected, such circuit allowing the electric parking valve to receive a signal to activate the parking brake. The circuit includes the high voltage circuit and the low voltage circuit previously described.

[0047] The term "operating state" used in this article refers to the state in which the electronic parking valve receives an electrical signal to activate the parking brake, and the term "non-operating state" refers to the state in which the electronic parking valve does not activate the parking brake. When the circuit is de-energized, the electronic parking valve cannot switch from the non-operating state to the operating state to activate the parking brake.

[0048] The term "preset threshold" as used herein refers to a situation or state when the vehicle parking system meets the conditions for activating the parking brake or when the parking brake needs to be activated. For example, the preset threshold may refer to a situation where the circuit power supply is abnormal (for example, the voltage across the electronic parking valve is 0), or a situation where the operator finds that the vehicle is driving abnormally (for example, the vehicle has traveled a certain distance beyond a predetermined position), etc. The "preset threshold" threshold may not be a specific value. Further, in this article, "the electronic parking valve is in the non-operating state and the vehicle parking system reaches the preset threshold"

[0049] As used herein, the term "atmosphere" refers to the external environment other than the entire vehicle.

[0050] In the following, the same reference numerals are used to identify the same or similar components.

[0051] The present invention provides a vehicle parking system that uses a redundant parking device to achieve parking when an electronic parking valve cannot activate parking. It should be understood that although in the following embodiments, the parking system of the present invention is mainly used for an autonomous driving vehicle, the parking system of the present invention can be used non-exclusively for any other vehicle using an electronic parking system in other embodiments.

[0052] Reference Figure 1-2 , shows a first embodiment of a vehicle parking system 1 according to the present invention, which includes a parking air chamber 10 to achieve parking brake. Usually, the vehicle parking system 1 includes a pair of parking air chambers 10, which are respectively connected to the tires on both sides. Generally speaking, the parking air chamber 10 includes a spring and a brake rod associated with the spring. When the vehicle is running normally, the parking air chamber 10 is filled with compressed gas, and the compressed gas compresses the spring, thereby the brake rod retracts and the wheel works normally. When the parking brake is activated, the compressed gas in the parking air chamber 10 is discharged, so that the spring recovers its shape, and the rebound force of the spring pushes the brake rod out to operate the brake component to apply resistance to the wheel, thereby achieving parking brake. The specific structure of the parking air chamber 10 is known in the art and will not be repeated herein.

[0053] As shown in the figure, the parking air chamber 10 is connected to the compressed gas source 20 (see Figure 2) is connected so that the compressed gas from the compressed gas source 20 enters the parking air chamber 10. An electronic parking valve 30 (also referred to as an EPB valve herein) is provided on the flow path between the parking air chamber 10 and the compressed gas source. The electronic parking valve 30 has an intake port 31, which is configured to be connected to the compressed gas source 20 so that the compressed gas can enter the electronic parking valve 30. The electronic parking valve 30 also has a first connection port 32 (also referred to as "port 21") and a second connection port 33 (also referred to as "port 22"), which are respectively connected to the parking air chamber 10 via pipelines, so that the compressed gas can enter the parking air chamber 10 via the electronic parking valve 30.

[0054] The electronic parking valve 30 is connected in a circuit (not shown) to receive a signal and has an operating state and a non-operating state. The electronic parking valve 30 can switch between these two states. In the operating state, the electronic parking valve 30 can receive a signal to cut off the connection with the compressed gas source in response to the signal and discharge the compressed gas from the parking air chamber 10 through the electronic parking valve 30 to the outside, thereby activating the parking brake, while in the non-operating state, the compressed gas cannot be discharged to the outside through the electronic parking valve 30.

[0055] In addition, the electric parking valve 30 further has a connection port 34 (also referred to as “port No. 4” or “control port”). The connection port 34 is usually sealed from the atmosphere to prevent the compressed gas from escaping.

[0056] An exemplary embodiment of the electronic parking valve 30 is described in CN220577230U, the disclosure of which is incorporated herein by reference.

[0057] In order to prevent the electronic parking valve 30 from being unable to receive a signal to switch from a non-working state to a working state to activate the parking brake due to power supply abnormality, the vehicle parking system 1 also includes a redundant parking device, which is connected to the connection port 34 of the electronic parking valve 30 and is configured to allow the compressed gas at the connection port 34 to be discharged outwardly through the redundant parking device when the electronic parking valve 30 is in a non-working state and the vehicle parking system 1 reaches a preset threshold. Here, the preset threshold may refer to a situation where the circuit power supply is abnormal (for example, the voltage across the electronic parking valve 30 is 0). In other words, the redundant parking device can allow the compressed gas to be discharged outwardly through the redundant parking device when the electronic parking valve 30 is in a non-working state and the circuit power supply is abnormal, thereby allowing the compressed gas in the parking air chamber 10 to be discharged outwardly through the exhaust port 35 of the electronic parking valve 30.

[0058] Reference Figure 1-2 and additionally refer to Figure 3In this embodiment, the redundant parking device includes a two-position three-way solenoid valve 40, which is closed to be sealed with the atmosphere under normal circumstances to prevent any compressed gas from entering the atmosphere through the two-position three-way solenoid valve 40, and when the electronic parking valve 30 is in a non-working state and the vehicle parking system 1 reaches a preset threshold, the two-position three-way solenoid valve is disconnected to communicate with the atmosphere. Specifically, in this embodiment, the two-position three-way solenoid valve 40 has a first port 41, a second port 42 and a third port 43, the first port 41 is blindly blocked, and the second port 42 can be connected to the connection port 34 through a nylon tube with a diameter of 8 mm, for example. When the circuit is powered normally, the second port 42 is connected to the first port 41, and the first port 41 is blindly blocked, which makes it impossible for the compressed gas at the connection port 34 to be discharged from the two-position three-way solenoid valve 40. When the electronic parking valve is in a non-operating state and the vehicle parking system 1 reaches a preset threshold, the second port 42 is connected to the third port 43, so that the compressed gas at the connection port 34 of the electronic parking valve 30 is discharged through the two-position three-way solenoid valve 40. The air pressure of the connection port 34 and the air pressure of the exhaust port 35 are the same. Therefore, when the air pressure of the connection port 34 is discharged, the air pressure of the exhaust port 35 will also become zero (relative to the ambient atmospheric pressure), and the exhaust port 35 and the parking air chamber 10 are connected, so that the compressed gas in the parking air chamber 10 and the pipeline is discharged through the exhaust port 35 of the electronic parking valve 30, thereby activating the parking brake and ensuring that the autonomous driving vehicle can be parked safely.

[0059] In this embodiment of the present invention, the two-position three-way solenoid valve 40 is advantageously connected in series with the electronic parking valve 30 in the circuit, so that when the electronic parking valve 30 is in a non-operating state and the vehicle parking system 1 reaches a preset threshold, for example, when the circuit is disconnected, the two-position three-way solenoid valve 40 is automatically disconnected. Thus, when the electronic parking valve 30 fails to activate the parking brake, the two-position three-way solenoid valve 40 can automatically activate the parking brake.

[0060] Preferably, in this embodiment, considering that the working life of the solenoid valve when it is normally powered is limited, the vehicle parking system 1 also includes a power-off protection device (not shown), which is connected to the two-position three-way solenoid valve 40 to perform power-off protection on the two-position three-way solenoid valve 40 when the electronic parking valve 30 is in a working state, thereby avoiding the problem of limited working life of the solenoid valve when it is normally powered, and effectively extending the service life of the valve.

[0061] In this embodiment, a two-position three-way solenoid valve 40 is used to perform emergency parking brake of the vehicle parking system 1, which makes the structure of the redundant parking device very simple and more economical. However, those skilled in the art will understand that other alternatives can be used to achieve an automatic activation parking function similar to the two-position three-way solenoid valve 40. For example, a two-position five-way solenoid valve can be used, or even a combination of a mechanical valve and a relay can be used. These alternatives also fall within the scope of the present invention.

[0062] Reference Figure 4-5 , shows a second embodiment of a vehicle parking system 1 according to the present invention, the vehicle parking system 1 includes a parking air chamber 10 to implement parking brake. Generally, the vehicle parking system 1 includes a pair of parking air chambers 10, which are respectively connected to tires on both sides. The specific structure of the parking air chamber 10 is known in the art and will not be described in detail herein.

[0063] As shown in the figure, the parking air chamber 10 is connected to the compressed gas source 20 so that the compressed gas from the compressed gas source 20 enters the parking air chamber 10. An electronic parking valve 30 is provided on the flow path between the parking air chamber 10 and the compressed gas source. The electronic parking valve 30 has an air inlet 31, which is configured to be connected to the compressed gas source 20 so that the compressed gas can enter the electronic parking valve 30. The electronic parking valve 30 also has a first connection port 32 and a second connection port 33, which are respectively connected to the parking air chamber 10 via pipelines so that the compressed gas can enter the parking air chamber 10 via the electronic parking valve 30.

[0064] The electronic parking valve 30 is connected in a circuit (not shown) to receive a signal, and has an operating state and a non-operating state. The electronic parking valve 30 can switch between these two states. In the operating state, the electronic parking valve 30 can receive a signal to cut off the connection with the compressed gas source in response to the signal and discharge the compressed gas from the parking air chamber 10 through the electronic parking valve 30 to the outside, thereby activating the parking brake, while in the non-operating state, the compressed gas cannot be discharged to the outside through the electronic parking valve 30. In addition, the electronic parking valve 30 also has a connection port 34. The connection port 34 is usually sealed from the atmosphere.

[0065] In order to prevent the electronic parking valve 30 from being unable to receive a signal to switch from a non-operating state to a working state to activate the parking brake due to power supply abnormality, the vehicle parking system 1 also includes a redundant parking device, which is connected to the connection port 34 of the electronic parking valve 30 and is configured to allow the compressed gas at the connection port 34 to be discharged outwardly through the redundant parking device when the electronic parking valve 30 is in a non-operating state and the vehicle parking system 1 reaches a preset threshold. Here, the preset threshold may refer to a situation where the operator finds that the vehicle is driving abnormally (for example, the vehicle travels a specific distance beyond a predetermined position). In other words, the redundant parking device can be operated to allow the compressed gas to be discharged outwardly through the redundant parking device when the electronic parking valve 30 is in a non-operating state and the operator finds that the vehicle is driving abnormally, thereby allowing the compressed gas in the parking air chamber 10 to be discharged outwardly through the electronic parking valve 30.

[0066] In this embodiment, the redundant parking device includes a connector 50 and at least one gas valve 60 , wherein the connector 50 is connected to the connection port 34 of the electronic parking valve 30 , and the gas valve 60 is connected to the connector 50 , wherein the gas valve 60 can be operated to activate the parking brake.

[0067] Specifically, refer to Figure 6 In one example, the air valve 60 includes an air inlet 61, an air outlet 62 and a switch 63, and the air inlet 61 can be connected to the joint 50 by, for example, a nylon tube with a diameter of 6 mm. The switch 63 can be operated to connect the air inlet 61 with the air outlet 62. The switch 63 can be in the form of, for example, a button. When the operator finds that the vehicle is driving abnormally, he only needs to press the switch 63 to enable the air valve to discharge the compressed air at the connection port 34 of the electronic parking valve 30 from the air outlet 62, thereby activating the parking brake. This design makes the operation of the air valve 60 simple, which is conducive to quickly starting the parking and improving safety. Further, the switch 63 can be operated to isolate the air inlet 61 from the air outlet 62, thereby releasing the parking brake. For example, in the case where the switch 63 is a button, the switch can be rotated to block the flow path between the air inlet 61 and the air outlet 62.

[0068] More preferably, the redundant parking device includes two gas valves 60, and the connector 50 is a three-way connector such as an F-type connector. The two gas valves 60 are arranged so that the switch 63 is positioned on both sides of the vehicle. Thus, the operator can operate the button on either side of the vehicle without having to go around to one side to facilitate the operation of emergency parking.

[0069] Although the present invention provides two different embodiments of the vehicle parking system, those skilled in the art will appreciate that the features of the above two embodiments can be combined to form new embodiments. For example, in an additional embodiment, the vehicle parking system can include the two-position three-way solenoid valve and two gas valves as described above, and the connector can be replaced with a four-way connector to connect the two-position three-way solenoid valve and the two gas valves. Such embodiments can still meet the requirements of the present invention, and these embodiments all fall within the scope of the present invention.

[0070] The technical advantage of the vehicle parking system proposed by the present invention is that the system can realize the parking brake action in the case of abnormal power supply. The entire control process does not need to go through the vehicle control system. Even if the power supply of the whole vehicle fails, the parking brake can still be effectively activated automatically or manually to ensure the safe parking of the vehicle.

[0071] Although the structure and operation method of the present invention are described above in conjunction with the preferred embodiments, it should be recognized by those skilled in the art that the above examples are only for illustration and cannot be used as limitations of the present invention. Therefore, the present invention may be modified and varied, and these modifications and variations will fall within the scope defined by the appended claims of the present application.

Claims

1. A vehicle parking system (1), comprising: Parking air chamber (10); an electronic parking valve (30), the electronic parking valve (30) being arranged on a flow path between the parking air chamber (10) and a compressed gas source (20), the electronic parking valve (30) comprising a connection port (34), wherein the electronic parking valve (30) is switchable between an operating state and a non-operating state, wherein in the operating state, compressed gas can be discharged from the parking air chamber (10) through the electronic parking valve (30) to the outside, thereby activating the parking brake, and in the non-operating state, the compressed gas cannot be discharged through the electronic parking valve (30); and A redundant parking device is connected to a connection port (34) of the electronic parking valve (30) and is configured to allow compressed gas at the connection port (34) to be discharged to the outside via the redundant parking device when the electronic parking valve (30) is in the non-operating state and the vehicle parking system (1) reaches a preset threshold, thereby allowing compressed gas in the parking air chamber (10) to be discharged to the outside via the electronic parking valve (30).

2. The vehicle parking system (1) according to claim 1, characterized in that: The redundant parking device comprises a two-position three-way solenoid valve (40), which is closed to be sealed from the atmosphere, wherein when the electronic parking valve is in the non-working state and the vehicle parking system reaches a preset threshold, the two-position three-way solenoid valve (40) is configured to be disconnected to communicate with the atmosphere.

3. The vehicle parking system (1) according to claim 2, characterized in that: The two-position three-way solenoid valve (40) has a first port (41), a second port (42) and a third port (43), wherein the second port (42) is communicated with the first port (41), and the second port (42) is connected to the connection port (43). wherein, when the electronic parking valve is in the non-operating state (30) and the vehicle parking system (1) reaches a preset threshold, the second port (42) is switched to communicate with the third port (43), and Wherein, the first port (41) is blindly blocked.

4. The vehicle parking system (1) according to claim 2, characterized in that: The two-position three-way solenoid valve (40) is connected in series with the electronic parking valve (30) in a circuit, so that when the electronic parking valve (30) is in the non-working state and the vehicle parking system (1) reaches a preset threshold, the two-position three-way solenoid valve (30) is automatically disconnected.

5. The vehicle parking system (1) according to claim 2, characterized in that: It also includes a power-off protection device, which is connected to the two-position three-way solenoid valve (40) to perform power-off protection on the two-position three-way solenoid valve (40) when the electronic parking valve (30) is in the working state.

6. The vehicle parking system (1) according to claim 1, characterized in that: The redundant parking device comprises a connector (50) and at least one gas valve (60), wherein the connector (50) is connected to the connection port (34) of the electronic parking valve (30), and the at least one gas valve (60) is connected to the connector (50). The gas valve (60) can be operated to allow the compressed gas to be discharged from the parking air chamber (10).

7. The vehicle parking system (1) according to claim 6, characterized in that The redundant parking device comprises two air valves (60), and the joint (50) is a three-way joint.

8. The vehicle parking system (1) according to claim 7, characterized in that: The air valve (60) comprises an air inlet (61), an air outlet (62) and a switch (63), wherein the air inlet (61) is connected to the joint (50). The switch (63) can be operated to connect the air inlet (61) to the air outlet (62).

9. The vehicle parking system (1) according to claim 8, characterized in that: The air valve (60) is arranged so that switches are located on both sides of the vehicle.

10. The vehicle parking system (1) according to claim 8, characterized in that The switch (63) can be operated to isolate the air inlet (61) from the air outlet (62).

Images