Air suspension system and vehicle with same

Abstract

The utility model discloses an air suspension system and a vehicle with the air suspension system. The air suspension system comprises an air spring and an air spring, the number of the air path switching devices is the same as that of the air springs, the air path switching devices are in one-to-one correspondence with the air springs, each air path switching device is provided with a first connector, a second connector and a third connector and is used for controlling communication or cut-off of the first connector, the second connector and the third connector, and the first connector is connected with the corresponding air spring; the gas inlet pipeline and the gas exhaust pipeline are respectively connected with the second interface and the third interface; and the electric control unit is electrically connected with the gas path switching device. According to the air suspension system, the corresponding air springs can be flexibly adjusted to be inflated or deflated by controlling the air path switching devices, namely, each air spring can be independently inflated or deflated, so that the height of each air spring can be flexibly adjusted according to different road conditions and the like; the adjusting flexibility of the air suspension system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an air suspension system and a vehicle having the same. Background Art

[0002] Vehicles equipped with air spring suspensions offer superior ride smoothness, comfort, and operational stability during driving. With their increasing popularity, air springs have become standard equipment in high-end vehicles. Air spring suspensions primarily adjust the height and elasticity of the air springs by inflating and deflating them. However, the related art requires simultaneous inflation and deflation of multiple air springs, preventing independent adjustment of each air spring and resulting in limited flexibility. Therefore, improvements are needed. Utility Model Content

[0003] A first aspect of the present invention provides an air suspension system, which has the advantages of being able to independently adjust each air spring and having high adjustment flexibility.

[0004] According to the air suspension system of the first aspect embodiment of the present utility model, it includes: air springs; air circuit switching devices, the number of which is the same as and one-to-one corresponding to the air springs, the air circuit switching device having a first interface, a second interface and a third interface and being used to control the connection or cutoff of the first interface with the second interface and the third interface, the first interface being connected to the corresponding air spring; an intake pipe and an exhaust pipe being connected to the second interface and the third interface respectively; an electronic control unit being electrically connected to the air circuit switching device.

[0005] According to the air suspension system of the embodiment of the first aspect of the present invention, an independent control circuit can be formed between each air spring and the intake pipe and the exhaust pipe through the corresponding air circuit switching device, so that the inflation or deflation of the corresponding air spring can be flexibly adjusted by controlling multiple air circuit switching devices, that is, each air spring can be independently inflated or deflated, so that the height of each air spring can be flexibly adjusted according to road conditions, etc., so as to enhance the adjustment flexibility of the air suspension system.

[0006] According to some embodiments of the present invention, the air circuit switching device includes a first solenoid valve and a second solenoid valve, the first solenoid valve is a two-position three-way solenoid valve and is used to connect the intake pipe, the exhaust pipe and the second solenoid valve, and the second solenoid valve is a connecting valve and is used to connect the first solenoid valve and the air spring.

[0007] According to some embodiments of the present invention, the air circuit switching device is a three-position three-way solenoid valve and is used to connect the intake pipe, the exhaust pipe and the air spring.

[0008] According to some embodiments of the present invention, the air suspension system also includes a high-pressure chamber, a low-pressure chamber and an air supply device, the air intake pipe connects the high-pressure chamber and the second interface, the low-pressure chamber is connected to the third interface through an exhaust pipe, and the air supply device is used to drive the gas in the low-pressure chamber to flow toward the high-pressure chamber and to drive external gas into the low-pressure chamber.

[0009] According to some embodiments of the present invention, the low-pressure chamber has an air inlet and an exhaust port, the air inlet is connected to the exhaust pipe, and the gas delivery device includes: a third solenoid valve, the third solenoid valve is a three-way valve and includes a fourth interface, a fifth interface and a sixth interface, the fourth interface is connected to the external space, and the fifth interface is connected to the exhaust port; an air pump, the air inlet end of the air pump is connected to the sixth interface; a fourth solenoid valve, the fourth solenoid valve is a connecting valve and is connected to the exhaust end of the air pump; a fifth solenoid valve, the fifth solenoid valve is a three-way valve and includes a seventh interface, an eighth interface and a ninth interface, the seventh interface is connected to the air pump through the fourth solenoid valve, and the eighth interface and the ninth interface are respectively connected to the air inlet pipe and the exhaust pipe; wherein, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are all electrically connected to the electronic control unit.

[0010] According to some embodiments of the present utility model, the air circuit switching device includes a first solenoid valve and a second solenoid valve, the first solenoid valve is a two-position three-way solenoid valve and is used to connect the intake pipe, the exhaust pipe and the second solenoid valve, the second solenoid valve is a connecting valve and is used to connect the first solenoid valve and the air spring, and the fifth solenoid valve is the same solenoid valve as one of the first solenoid valves.

[0011] According to some embodiments of the present invention, the air suspension system further includes: an air storage tank, wherein the low-pressure chamber and the high-pressure chamber are both formed in the air storage tank.

[0012] According to some embodiments of the present invention, the air suspension system also includes: a first pressure sensor for detecting the pressure in the high-pressure chamber and a second pressure sensor for detecting the pressure in the low-pressure chamber, the first pressure sensor and the second pressure sensor are both electrically connected to the electronic control unit; and / or the high-pressure chamber is provided with a pressure relief structure.

[0013] According to some embodiments of the present invention, the air suspension system further includes: height sensors, the number of which is the same as and corresponds one-to-one to the air springs, the height sensors being used to detect the height of the corresponding air springs and being electrically connected to the electronic control unit.

[0014] A second aspect of the present invention provides a vehicle.

[0015] A vehicle according to an embodiment of the second aspect of the present invention includes: the above-mentioned air suspension system.

[0016] According to the vehicle of the embodiment of the second aspect of the present invention, an independent control circuit can be formed between each air spring and the intake pipe and the exhaust pipe through the corresponding air circuit switching device, so that the inflation or deflation of the corresponding air spring can be flexibly adjusted by controlling multiple air circuit switching devices, that is, each air spring can be independently inflated or deflated, so that the height of each air spring can be flexibly adjusted according to road conditions, etc., so as to enhance the adjustment flexibility of the air suspension system.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an air suspension system according to a first embodiment of the present utility model;

[0019] Figure 2 It is a schematic diagram of an air suspension system according to the second embodiment of the present utility model.

[0020] Reference numerals:

[0021] 100. Air suspension system;

[0022] 1. Air spring; 2. Air path switching device; 21. First solenoid valve; 22. Second solenoid valve;

[0023] 3. Intake pipe; 4. Exhaust pipe; 5. Electronic control unit;

[0024] 6. Gas storage tank; 61. High-pressure chamber; 62. Low-pressure chamber; 63a. First pressure sensor; 63b. Second pressure sensor; 64. Pressure relief structure;

[0025] 71. Third solenoid valve; 72. Air pump; 73. Fourth solenoid valve; 74. Fifth solenoid valve; 75. Filter mechanism;

[0026] 8. Height sensor. DETAILED DESCRIPTION

[0027] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0029] An air suspension system 100 according to an embodiment of the first aspect of the present invention will be described below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2 As shown, the air suspension system 100 according to the embodiment of the first aspect of the present utility model includes: an air spring 1, an air circuit switching device 2, an intake pipe 3, an exhaust pipe 4 and an electronic control unit 5. The air circuit switching devices 2 are the same in number as the air springs 1 and correspond one to one. For example, an air spring 1 is provided at each of the four tires of the vehicle, that is, when the vehicle has four air springs 1, the air circuit switching devices 2 are also provided with four corresponding one to one to the four air springs 1.

[0031] The air circuit switching device 2 has a first interface, a second interface, and a third interface and is used to control the connection or cutoff of the first interface with the second interface and the third interface. The first interface is connected to the corresponding air spring 1, the intake line 3 and the exhaust line 4 are connected to the second interface and the third interface respectively, and the electronic control unit 5 is electrically connected to the air circuit switching device 2. It can be understood that since the intake line 3 injects gas into the air spring 1 to achieve inflation, the air discharged from the air spring 1 can be discharged into the exhaust line 4 to achieve deflation.

[0032] That is to say, the electronic control unit 5 can send instructions to the air circuit switching device 2 to control the connection or disconnection of the first interface, the second interface and the third interface. When it is necessary to inflate the air spring 1, the air circuit switching device 2 controls the first interface to be connected to the second interface and to be disconnected from the third interface, and the gas in the intake pipe 3 can enter the air spring 1 through the first interface and the second interface in sequence; when the air spring 1 is deflated, the air circuit switching device 2 controls the first interface to be connected to the third interface and to be disconnected from the second interface, and the gas in the air spring 1 can enter the exhaust pipe 4 through the first interface and the third interface in sequence.

[0033] That is, the air circuit switching device 2 can control the connection or disconnection between the first interface, the second interface, and the third interface to control the connection or disconnection between the corresponding air spring 1 and the intake pipe 3 or the exhaust pipe 4, thereby inflating or deflating the air spring 1. Therefore, each air spring 1 can form an independent control loop with the intake pipe 3 and the exhaust pipe 4 through the corresponding air circuit switching device 2, so that the inflation or deflation of the corresponding air spring 1 can be flexibly adjusted by controlling multiple air circuit switching devices 2. That is, each air spring 1 can be independently inflated or deflated, so that the height of each air spring 1 can be flexibly adjusted according to different road conditions, etc., thereby improving the adjustment flexibility of the air suspension system 100.

[0034] Specifically, taking the example of four air springs 1 provided with left front, right front, left rear and right rear, during the use of the vehicle, such as when the vehicle body tilts to the left, the electronic control unit 5 can control the air path switching devices 2 corresponding to the two air springs 1 on the left to inflate the two air springs 1 on the left, and control the air path switching devices 2 corresponding to the two air springs 1 on the right to deflate the two air springs 1 on the right, thereby correcting the vehicle body to a horizontal state, so as to improve the vehicle's driving smoothness, ride comfort and operational stability.

[0035] According to the air suspension system 100 of the embodiment of the first aspect of the present invention, an independent control circuit can be formed between each air spring 1 and the intake pipe 3 and the exhaust pipe 4 through the corresponding air circuit switching device 2, so that the inflation or deflation of the corresponding air spring 1 can be flexibly adjusted by controlling multiple air circuit switching devices 2, that is, each air spring 1 can be independently inflated or deflated, so that the height of each air spring 1 can be flexibly adjusted according to road conditions, etc., so as to enhance the adjustment flexibility of the air suspension system 100.

[0036] According to some embodiments of the present utility model, the air circuit switching device 2 includes a first solenoid valve 21 and a second solenoid valve 22. The first solenoid valve 21 is a two-position three-way solenoid valve and is used to connect the intake line 3, the exhaust line 4, and the second solenoid valve 22. The second solenoid valve 22 is a connecting valve and is used to connect the first solenoid valve 21 and the air spring 1. In other words, two of the three interfaces of the first solenoid valve 21 are respectively connected to the intake line 3 and the exhaust line 4, and the other is connected to the air spring 1 through the second solenoid valve 22. The two interfaces connecting the first solenoid valve 21 to the intake line 3 and the exhaust line 4 form the second interface and the third interface, respectively, and the interface connecting the second solenoid valve 22 to the air spring 1 forms the first interface.

[0037] Among them, the electronic control unit 5 is electrically connected to the first solenoid valve 21 and the second solenoid valve 22. Since the first solenoid valve 21 is a two-position three-way solenoid valve, the first solenoid valve 21 can control the connection between the second interface or the third interface and the structure connected to the second solenoid valve 22. The second solenoid valve 22 is a connecting valve that can control the connection or cutoff of the pipeline between the first solenoid valve 21 and the air spring 1. Therefore, when the air spring 1 is inflated, the first solenoid valve 21 controls the second interface to be connected to the interface connected to the second solenoid valve 22. At this time, the third interface is cut off from the first interface, and the second solenoid valve 22 is in a conducting state, so that the gas in the intake pipe 3 can pass through the first solenoid valve 21 and the second solenoid valve 22 in sequence to enter the air spring 1; when the air spring 1 needs to be deflated, the first solenoid valve 21 controls the third interface to be connected to the interface connected to the second solenoid valve 22. At this time, the second interface is cut off from the first interface, and the second solenoid valve 22 is in a conducting state, so that the gas in the air spring 1 can pass through the first solenoid valve 21 and the second solenoid valve 22 in sequence to enter the exhaust pipe 4; and when it is necessary to maintain the amount of air in the air spring 1, the second solenoid valve 22 can be controlled to switch to the cut-off state. Among them, the two-position three-way solenoid valve and the connecting valve have a simple structure and a relatively mature process, which can reduce the cost of the air path switching device 2.

[0038] According to some embodiments of the present invention, the air path switching device 2 is a three-way solenoid valve and is used to connect the intake pipe 3, the exhaust pipe 4, and the air spring 1. The three-way solenoid valve is electrically connected to the electronic control unit 5 and has three interfaces, namely, a first interface, a second interface, and a third interface. The three-way solenoid valve has three positions, which can control whether the first interface is connected to the second interface or the third interface. Therefore, when inflating the air spring 1, the three-way solenoid valve controls the second interface to connect to the interface connected to the second solenoid valve 22. At this time, the third interface is disconnected from the first interface, allowing the gas in the intake pipe 3 to enter the air spring 1 through the three-way solenoid valve. When the air spring 1 needs to be deflated, the three-way solenoid valve controls the third interface to connect to the interface connected to the second solenoid valve 22. At this time, the second interface is disconnected from the first interface, allowing the gas in the air spring 1 to enter the exhaust pipe 4 through the three-way solenoid valve. When the air volume in the air spring 1 needs to be maintained, the three-way solenoid valve controls the first interface to connect to both the second interface and the third interface. Therefore, the three-position three-way solenoid valve can control the switching of the air circuit while maintaining the gas volume in the air spring 1, which can reduce the number of parts of the air suspension system 100 and has a compact structure to reduce the installation space occupied by the air suspension system 100.

[0039] According to some embodiments of the present invention, the air suspension system 100 further includes a high-pressure chamber 61, a low-pressure chamber 62, and a gas delivery device. The intake line 3 connects the high-pressure chamber 61 with the second interface, and the low-pressure chamber 62 is connected to the third interface via the exhaust line 4. The gas delivery device is used to drive the gas in the low-pressure chamber 62 toward the high-pressure chamber 61 and to drive external gas into the low-pressure chamber 62. In other words, on the one hand, the high-pressure chamber 61 can be connected to the air spring 1 via the intake line 3 and the gas path switching device 2 to inflate the air spring 1, and the air spring 1 can be connected to the low-pressure chamber 62 via the gas path switching device 2 and the exhaust line 4 to deflate the low-pressure chamber 62. Gas entering the low-pressure chamber 62 can enter the high-pressure chamber 61 via the gas delivery device to facilitate inflating the air spring 1. In other words, the gas in the air suspension system 100 can continuously circulate between the high-pressure chamber 61, the air spring 1, and the low-pressure chamber 62. In this way, the gas in the air suspension system 100 can be recycled and the clean air in the air suspension system 100 can be prevented from being discharged into the atmosphere to reduce system energy loss and exhaust noise. Secondly, the working time of devices that transport gas to the air suspension system 100, such as the air pump 72 and the air compressor, can be effectively reduced to prevent overheating and extend the working life. In addition, the amount of air from the atmospheric environment entering the air suspension system 100 can be reduced, making the air inside the air suspension system 100 cleaner, and the amount of filter dehumidifier used and the wear of the valve core in the air suspension system 100 can be reduced.

[0040] On the other hand, when the gas pressure within the air suspension system 100 is insufficient, the gas supply device can be used to deliver gas from the external space to the low-pressure chamber 62 for replenishment. It is understood that the gas pressure within the low-pressure chamber 62 is lower than the gas pressure within the high-pressure chamber 61. By replenishing gas into the low-pressure chamber 62, the pressure differential of the high-pressure gas buildup can be reduced, thereby lowering the compression ratio requirements of the gas supply device, thereby reducing the operating cost and energy loss of the gas supply device, and making the air suspension system 100 more adaptable to use in high-altitude environments.

[0041] According to some embodiments of the present utility model, the low-pressure chamber 62 has an air inlet and an exhaust port, the air inlet is connected to the exhaust pipe 4, and the gas delivery device includes: a third solenoid valve 71, an air pump 72, a fourth solenoid valve 73 and a fifth solenoid valve 74, the third solenoid valve 71 is a three-way valve and includes a fourth interface, a fifth interface and a sixth interface, the fourth interface is connected to the external space, the fifth interface is connected to the exhaust port, the air inlet end of the air pump 72 is connected to the sixth interface, the fourth solenoid valve 73 is a connecting valve and is connected to the exhaust end of the air pump 72, the fifth solenoid valve 74 is a three-way valve and includes a seventh interface, an eighth interface and a ninth interface, the seventh interface is connected to the air pump 72 through the fourth solenoid valve 73, and the eighth interface and the ninth interface are connected to the air inlet pipe 3 and the exhaust pipe 4 respectively.

[0042] Among them, the third solenoid valve 71 can control the fourth interface to be connected with the fifth interface or the sixth interface, so that the air intake end of the air pump 72 can be connected with the external space or the low-pressure chamber 62 through the third solenoid valve 71, the fourth solenoid valve 73 can control the on-off of the air path between the air pump 72 and the fifth solenoid valve 74, and the fifth solenoid valve 74 can control the seventh interface to be connected with the eighth interface or the ninth interface, so that the exhaust end of the air pump 72 can be connected with the air intake chamber or the exhaust chamber through the fifth solenoid valve 74.

[0043] Therefore, when it is necessary to replenish air into the low-pressure chamber 62, the air pump 72 is turned on, and the third solenoid valve 71 controls the fourth interface to be connected to the sixth interface. At this time, the fourth interface and the fifth interface are cut off, and the fourth solenoid valve 73 is in a conducting state. The fifth solenoid valve 74 controls the seventh interface to be connected to the ninth interface. At this time, the seventh interface and the eighth interface are cut off, so that the air in the external space can enter the low-pressure chamber 62 through the third solenoid valve 71, the air pump 72, the fourth solenoid valve 73, the fifth solenoid valve 74 and the exhaust pipe 4 in sequence under the drive of the air pump 72; when the gas in the low-pressure chamber 62 is transported to the high-pressure chamber 61, the air pump 72 is turned on. Air pump 72, the third solenoid valve 71 controls the fourth interface to be connected with the fifth interface. At this time, the fourth interface and the sixth interface are cut off. The fourth solenoid valve 73 is in the on state. The fifth solenoid valve 74 controls the seventh interface to be connected with the eighth interface. At this time, the seventh interface and the ninth interface are cut off, so that the air in the low-pressure chamber 62 can enter the low-pressure chamber 62 through the third solenoid valve 71, the air pump 72, the fourth solenoid valve 73, the fifth solenoid valve 74 and the intake pipe 3 in sequence under the drive of the air pump 72; and when it is necessary to maintain the gas in the low-pressure chamber 62 and the high-pressure chamber 61, the fourth solenoid valve 73 can be switched to the cut-off state.

[0044] The third solenoid valve 71, air pump 72, fourth solenoid valve 73, and fifth solenoid valve 74 are used to supply air to the low-pressure chamber 62 and the high-pressure chamber 61, thereby reusing the third solenoid valve 71, air pump 72, fourth solenoid valve 73, and fifth solenoid valve 74. This simplifies the structure of the air suspension system 100, reducing costs and installation space. Furthermore, the third solenoid valve 71, fourth solenoid valve 73, and fifth solenoid valve 74 are all electrically connected to the electronic control unit 5, allowing the electronic control unit 5 to issue control commands to the third solenoid valve 71, fourth solenoid valve 73, and fifth solenoid valve 74.

[0045] In one specific example, the air delivery device further includes a filter mechanism 75, which is located upstream of the third solenoid valve 71 and is used to connect the third solenoid valve 71 with the external space. Specifically, after entering the air delivery device, the external space is first aligned and filtered by the filter mechanism 75. This improves the cleanliness of the air delivered by the air delivery device into the low-pressure chamber 62, thereby preventing dust and other impurities in the air entering the air suspension system 100 from affecting the stable operation of the valve core, etc. The filter mechanism 75 can be a dehumidification and dust removal filter element, thereby reducing the humidity and dust content of the air entering the air suspension system 100.

[0046] According to some embodiments of the present invention, the air path switching device 2 includes a first solenoid valve 21 and a second solenoid valve 22. The first solenoid valve 21 is a two-position, three-way solenoid valve and is used to connect the intake line 3, the exhaust line 4, and the second solenoid valve 22. The second solenoid valve 22 is a connecting valve and is used to connect the first solenoid valve 21 and the air spring 1. The fifth solenoid valve 74 is the same solenoid valve as one of the first solenoid valves 21. This allows for the reuse of one of the first solenoid valves 21, thereby simplifying the structure of the air suspension system 100 and reducing costs and installation space.

[0047] Specifically, if Figure 1 As shown, one end of the fourth solenoid valve 73 facing away from the air pump 72 is connected between any group of the first solenoid valve 21 and the corresponding second solenoid valve 22, eliminating the cost and installation space of an additional fifth one-way valve.

[0048] According to some embodiments of the present invention, the air suspension system 100 further includes an air tank 6, wherein the low-pressure chamber 62 and the high-pressure chamber 61 are both formed within the air tank 6. Specifically, integrating the low-pressure chamber 62 and the high-pressure chamber 61 within the air tank 6 makes the layout of the low-pressure chamber 62 and the high-pressure chamber 61 more compact, and at the same time, reduces the difficulty of communication between the high-pressure chamber 61 and the low-pressure chamber 62, thereby facilitating the transfer of air from the low-pressure chamber 62 to the high-pressure chamber 61.

[0049] According to some embodiments of the present invention, the air suspension system 100 further includes: a first pressure sensor 63a for detecting the pressure within the high-pressure chamber 61; and a second pressure sensor 63b for detecting the pressure within the low-pressure chamber 62. Both the first pressure sensor 63a and the second pressure sensor 63b are electrically connected to the electronic control unit 5. This facilitates detection of the pressures within the high-pressure chamber 61 and the low-pressure chamber 62, allowing for appropriate processing based on the pressures within the high-pressure chamber 61 and the low-pressure chamber 62. For example, when the pressure within the high-pressure chamber 61 is too low, gas from the low-pressure chamber 62 can be transferred to the high-pressure chamber 61 via a gas delivery device. When the pressure within the low-pressure chamber 62 is too low, air from the external space can be transferred to the low-pressure chamber 62 via the gas delivery device. When the pressure within the high-pressure chamber 61 is too high, pressure relief can be achieved by opening a pressure relief valve or other pressure relief structure 64, etc. Details are omitted here.

[0050] According to some embodiments of the present invention, the high-pressure chamber 61 is provided with a pressure relief structure 64. Thus, when the pressure in the high-pressure chamber 61 is too high, the pressure relief structure 64 can release gas to reduce the pressure in the high-pressure chamber 61, thereby preventing the high pressure in the high-pressure chamber 61 from damaging the air suspension system 100.

[0051] According to some embodiments of the present invention, the air suspension system 100 further includes: height sensors 8, which are equal in number to and correspond to the number of air springs 1. The height sensors 8 are used to detect the height of the corresponding air springs 1 and are electrically connected to the electronic control unit 5. Thus, the height of each air spring 1 can be monitored in a timely manner by the height sensors 8, thereby facilitating the determination of whether the air springs 1 are inflated to a preset height, thereby improving the accuracy of the height control of the air springs 1.

[0052] A vehicle according to an embodiment of the second aspect of the present invention will be described below with reference to the accompanying drawings.

[0053] A vehicle according to an embodiment of the second aspect of the present invention includes an air suspension system 100 .

[0054] According to the vehicle of the embodiment of the second aspect of the present invention, an independent control circuit can be formed between each air spring 1 and the intake pipe 3 and the exhaust pipe 4 through the corresponding air circuit switching device 2, so that the inflation or deflation of the corresponding air spring 1 can be flexibly adjusted by controlling multiple air circuit switching devices 2, that is, each air spring 1 can be independently inflated or deflated, so that the height of each air spring 1 can be flexibly adjusted according to road conditions, etc., so as to enhance the adjustment flexibility of the air suspension system 100.

[0055] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0057] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air suspension system, characterized in that: include: Air springs; an air circuit switching device, the number of which is the same as and corresponds to the air springs, the air circuit switching device having a first interface, a second interface, and a third interface and being used to control the connection or cutoff of the first interface with the second interface and the third interface, the first interface being connected to the corresponding air spring; an air intake pipe and an exhaust pipe, connected to the second interface and the third interface respectively; The electronic control unit is electrically connected to the gas path switching device.

2. The air suspension system according to claim 1, characterized in that: The air circuit switching device includes a first solenoid valve and a second solenoid valve. The first solenoid valve is a two-position three-way solenoid valve and is used to connect the intake pipe, the exhaust pipe and the second solenoid valve. The second solenoid valve is a connecting valve and is used to connect the first solenoid valve and the air spring.

3. The air suspension system according to claim 1, characterized in that: The air circuit switching device is a three-position three-way solenoid valve and is used to connect the intake pipe, the exhaust pipe and the air spring.

4. The air suspension system according to claim 1, characterized in that: It also includes a high-pressure chamber, a low-pressure chamber and a gas supply device, the air inlet pipe connects the high-pressure chamber and the second interface, the low-pressure chamber is connected to the third interface through an exhaust pipe, and the gas supply device is used to drive the gas in the low-pressure chamber to flow toward the high-pressure chamber and to drive external gas into the low-pressure chamber.

5. The air suspension system according to claim 4, characterized in that: The low-pressure chamber has an air inlet and an air outlet, the air inlet is connected to the exhaust pipeline, and the air delivery device includes: a third solenoid valve, the third solenoid valve being a three-way valve and comprising a fourth interface, a fifth interface, and a sixth interface, the fourth interface being in communication with the external space, and the fifth interface being connected to the exhaust port; an air pump, wherein an air inlet end of the air pump is connected to the sixth interface; a fourth solenoid valve, the fourth solenoid valve being a communication valve and connected to the exhaust end of the air pump; The fifth solenoid valve is a three-way valve and includes a seventh interface, an eighth interface and a ninth interface. The seventh interface is connected to the air pump through the fourth solenoid valve, and the eighth interface and the ninth interface are connected to the intake pipe and the exhaust pipe respectively; wherein the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are all electrically connected to the electronic control unit.

6. The air suspension system according to claim 5, characterized in that: The air circuit switching device includes a first solenoid valve and a second solenoid valve. The first solenoid valve is a two-position three-way solenoid valve and is used to connect the intake pipe, the exhaust pipe and the second solenoid valve. The second solenoid valve is a connecting valve and is used to connect the first solenoid valve and the air spring. The fifth solenoid valve is the same solenoid valve as one of the first solenoid valves.

7. The air suspension system according to claim 4, characterized in that: Also includes: An air storage tank, wherein the low-pressure chamber and the high-pressure chamber are both formed in the air storage tank.

8. The air suspension system according to claim 4, characterized in that: Also includes: A first pressure sensor for detecting the pressure in the high-pressure chamber and a second pressure sensor for detecting the pressure in the low-pressure chamber, wherein the first pressure sensor and the second pressure sensor are both electrically connected to the electronic control unit; and / or the high-pressure chamber is provided with a pressure relief structure.

9. The air suspension system according to claim 1, characterized in that: Also includes: The number of height sensors is the same as that of the air springs and they correspond one to one. The height sensors are used to detect the height of the corresponding air springs and are electrically connected to the electronic control unit.

10. A vehicle, characterized in that: include: An air suspension system according to any one of claims 1 to 9.

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