Air supply control method and device of air suspension

Abstract

The embodiment of the invention provides an air supply control method and device for an air suspension, and relates to the field of vehicle control, the method comprises the steps of receiving an air supply request sent by a vehicle-mounted intelligent system, determining whether air in a low-pressure air storage tank meets the air supply request, and when the air in the low-pressure air storage tank meets the air supply request, controlling the low-pressure air storage tank to supply air; when the gas in the low-pressure gas storage tank meets the gas supply request, the low-pressure gas storage tank is controlled to supply gas to the vehicle-mounted intelligent system, and when the gas in the low-pressure gas storage tank does not meet the gas supply request, the high-pressure gas storage tank is controlled to supply gas to the low-pressure gas storage tank, so that the gas supply requirements of various systems of a modern electric vehicle can be met, and

Description

Technical Field

[0001] The present invention relates to the field of vehicle control, and in particular to an air supply control method and device for an air suspension. Background Art

[0002] In the prior art, air suspension systems are widely used in automobiles and other vehicles to improve ride comfort and driving stability. Air suspension uses air springs to adjust the height of the vehicle and achieve shock absorption. Its working principle is mainly to adjust the pressure inside the air spring by inflating or exhausting the air spring through a compressor, thereby changing the stiffness of the spring and the height of the vehicle. Air springs have become an important part of modern vehicle suspension systems due to their good adaptability, adjustability and lightweight characteristics.

[0003] In some high-end models, air suspension is not only used to adjust the height of the vehicle body and improve the riding experience, but may also integrate other functions. The realization of these additional functions requires the air suspension system to be more intelligent and efficient. However, in the process of realizing these additional functions, the air supply requirements of the air springs become more complicated. In order to ensure that these additional functions can operate normally, the existing air suspension system usually needs to add a redundant air supply system to realize the air supply of the air springs and other additional functions. This redundant design increases the complexity and cost of the system. Summary of the invention

[0004] The object of the present invention is to provide an air supply control method and device for an air suspension, which can reduce the system complexity while satisfying the air supply for additional functions of a vehicle.

[0005] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides an air supply control method for an air suspension, which is applied to a controller of an air supply control system, wherein the air supply control system also includes an air suspension system and an on-board intelligent system, wherein the air suspension system includes a low-pressure air storage tank and a high-pressure air storage tank; the high-pressure air storage tank is used to supply air to an air spring in the air suspension system; and the low-pressure air storage tank is used to supply air to the on-board intelligent system. The method includes:

[0007] Receiving a gas supply request sent by the vehicle-mounted intelligent system;

[0008] Determining whether the gas in the low-pressure gas storage tank meets the gas supply request;

[0009] When the gas in the low-pressure gas storage tank meets the gas supply request, controlling the low-pressure gas storage tank to supply gas to the on-board intelligent system;

[0010] When the gas in the low-pressure gas storage tank does not meet the gas supply request, the high-pressure gas storage tank is controlled to supply gas to the low-pressure gas storage tank.

[0011] In an optional embodiment, the air supply control system includes an air valve, a first switching valve, a second switching valve, a third switching valve, an air dryer and an air pump module, one end of the first switching valve is connected to a circuit of the air valve, the other end of the first switching valve is connected to the air pump module, the air pump module is connected to the air dryer, one end of the second switching valve is connected to the high-pressure air storage tank, the other end of the second switching valve is connected to the air pump module, one end of the third switching valve is connected to the low-pressure air storage tank, and the other end of the third switching valve is connected to the circuit of the air valve;

[0012] When the gas in the low-pressure gas storage tank does not meet the gas supply request, the step of controlling the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank comprises:

[0013] When the gas in the low-pressure gas storage tank does not meet the gas supply request, the first switching valve, the second switching valve, the air dryer, the air pump module and the third switching valve are controlled to open to control the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank.

[0014] In an optional embodiment, the air supply control system further includes an exhaust valve, the onboard intelligent system includes an exhaust system, and the method further includes:

[0015] Upon receiving a first instruction, controlling the gas in each of the air springs in the air suspension system to enter the low-pressure gas storage tank, wherein the first instruction instructs controlling the vehicle body to descend;

[0016] The exhaust system and / or the exhaust valve are controlled to exhaust the gas in each of the air springs in the air suspension system.

[0017] In an optional embodiment, the air supply control system includes a third switching valve and an air valve, the air valve is connected to the air spring in the air suspension system, one end of the third switching valve is connected to the low-pressure air storage tank, and the other end of the third switching valve is connected to the circuit of the air valve, and when receiving the first instruction, the step of controlling the gas in each of the air springs in the air suspension system to enter the low-pressure air storage tank includes:

[0018] The third switching valve and the air valve are controlled to open so that the gas in each of the air springs in the air suspension system enters the low-pressure air storage tank.

[0019] In an optional embodiment, the air supply control system includes an exhaust valve, the air pump module is connected to the exhaust valve, a fourth switching valve is provided on the circuit connecting the air pump module and the air valve circuit, and the exhaust valve is connected to the atmosphere;

[0020] The step of controlling the exhaust system and / or the exhaust valve to discharge the gas in each of the air springs in the air suspension system comprises:

[0021] Controlling the fourth switching valve, the air valve and the exhaust valve to open so that the gas in each of the air springs in the air suspension system is discharged;

[0022] and / or;

[0023] The exhaust system, the third switching valve and the air valve are controlled to open so that the gas in each of the air springs in the air suspension system is discharged.

[0024] In an optional implementation, the vehicle-mounted intelligent system further includes a tire inflation and deflation system, and the method further includes:

[0025] Determine the current vehicle speed;

[0026] When the current vehicle speed is zero, the tire inflation and deflation system is controlled to deflate the vehicle tires.

[0027] In an optional embodiment, the gas supply control system includes a third switching valve, the third switching valve is connected to the low-pressure gas storage tank, the gas control system also includes a pressure sensor, and the method further includes:

[0028] When it is detected that the low-pressure air storage tank supplies air to the tire inflation and deflation system, detecting the pressure of the tire of the vehicle based on the pressure sensor;

[0029] When the tire pressure reaches a preset pressure, the third switching valve is closed.

[0030] In an optional embodiment, the method further comprises:

[0031] Determining the pressure of the high-pressure gas storage tank during the process of exhausting the gas from the low-pressure gas storage tank to the high-pressure gas storage tank;

[0032] When the pressure of the high-pressure gas storage tank reaches a preset pressure, the exhaust system is controlled to exhaust gas to the atmosphere.

[0033] In an optional embodiment, the method further comprises:

[0034] When the high-pressure air storage tank supplies air to the air spring in the air suspension system, determining a first pressure at each location in the air suspension system;

[0035] When any of the first pressures is greater than a preset pressure, the exhaust valve is controlled to open.

[0036] In a second aspect, an embodiment of the present application provides a control device for an air suspension, which is applied to a controller of an air supply control system, wherein the air supply control system also includes an air suspension system and an on-board intelligent system, wherein the air suspension system includes a low-pressure gas storage tank and a high-pressure gas storage tank; the high-pressure gas storage tank is used to supply air to an air spring in the air suspension system; the low-pressure gas storage tank is used to supply air to the on-board intelligent system, and the device includes:

[0037] A receiving module, used for receiving a gas supply request sent by the vehicle-mounted intelligent system;

[0038] A determination module, used to determine whether the gas in the low-pressure gas storage tank meets the gas supply request;

[0039] The control module is used to control the low-pressure gas storage tank to supply gas to the on-board intelligent system when the gas in the low-pressure gas storage tank meets the gas supply request; and control the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank when the gas in the low-pressure gas storage tank does not meet the gas supply request.

[0040] In a third aspect, an embodiment of the present application provides an air supply control system, including a memory and a controller, wherein the memory stores a computer program, and the controller implements the steps of the air suspension control method when executing the computer program.

[0041] In a fourth aspect, an embodiment of the present application provides a storage medium having a computer program stored thereon, which implements the steps of the air suspension control method when executed by a controller.

[0042] This application has the following beneficial effects:

[0043] The present application receives a gas supply request sent by an on-board intelligent system, determines whether the gas in the low-pressure gas tank meets the gas supply request, and when the gas in the low-pressure gas tank meets the gas supply request, controls the low-pressure gas tank to supply gas to the on-board intelligent system; when the gas in the low-pressure gas tank does not meet the gas supply request, controls the high-pressure gas tank to supply gas to the low-pressure gas tank. This can solve the gas supply needs of various systems in modern trams and reduce the complexity and cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 A block diagram of an inflation control system provided by an embodiment of the present invention;

[0046] Figure 2 One of the flow charts of an air supply control method for an air suspension provided in an embodiment of the present invention;

[0047] Figure 3 One of the schematic diagrams of the gas supply control system provided by the embodiment of the present invention;

[0048] Figure 4 A second flow chart of an air supply control method for an air suspension provided in an embodiment of the present invention;

[0049] Figure 5 A second schematic diagram of a gas supply control system provided in an embodiment of the present invention;

[0050] Figure 6 A third flow chart of an air supply control method for an air suspension provided in an embodiment of the present invention;

[0051] Figure 7 The third schematic diagram of the gas supply control system provided by the embodiment of the present invention;

[0052] Figure 8 A fourth flow chart of an air supply control method for an air suspension provided in an embodiment of the present invention;

[0053] Fig. 9 A fourth schematic diagram of a gas supply control system provided in an embodiment of the present invention;

[0054] Fig.10 A fifth flow chart of an air supply control method for an air suspension provided in an embodiment of the present invention;

[0055] Fig.11 A structural block diagram of an air supply control device for an air suspension provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0057] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0059] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0061] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] After extensive research, the inventors found that air suspension is not only used to adjust the height of the vehicle body and improve the riding experience, but may also integrate other functions. The realization of these additional functions requires the air suspension system to be more intelligent and efficient. However, in the process of realizing these additional functions, the air supply requirements of the air spring become more complicated. In order to ensure that these additional functions can operate normally, the existing air suspension system usually needs to add a redundant air supply system to realize the air supply of the air spring and other additional functions. This redundant design increases the complexity and cost of the system.

[0063] In view of the discovery of the above problems, the present embodiment provides an air supply control method and device for an air suspension, which can determine whether the gas in the low-pressure gas tank meets the gas supply request by receiving the gas supply request sent by the on-board intelligent system. When the gas in the low-pressure gas tank meets the gas supply request, the low-pressure gas tank is controlled to supply gas to the on-board intelligent system. When the gas in the low-pressure gas tank does not meet the gas supply request, the high-pressure gas tank is controlled to supply gas to the low-pressure gas tank. This can solve the gas supply needs of various systems in modern trams and reduce the complexity and cost of the system. The solution provided in this embodiment is elaborated in detail below.

[0064] This embodiment provides an air supply control system that can control the air supply to an air suspension.

[0065] Please refer to Figure 1 , Figure 1 1 is a schematic diagram of the structure of the gas supply control system 100 provided in the embodiment of the present application. The gas supply control system 100 may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown. Figure 1 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0066] The air supply control system 100 includes an air supply control device 110 for an air suspension, a memory 120 and a controller 130 .

[0067] The components of the memory 120 and the controller 130 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The air supply control device 110 of the air suspension includes at least one software function module that can be stored in the memory 120 in the form of software or firmware or fixed in the operating system (OS) of the inflation control system 100. The controller 130 is used to execute the executable modules stored in the memory 120, such as the software function modules and computer programs included in the air supply control device 110 of the air suspension.

[0068] The memory 120 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), etc. The memory 120 is used to store a program, and the controller 130 executes the program after receiving an execution instruction.

[0069] Please refer to Figure 2 , Figure 2 For application Figure 1 The present invention is a flow chart of an air supply control method for an air suspension of an air supply control system 100, and the method including various steps is described in detail below.

[0070] The air supply control system also includes an air suspension system and an on-board intelligent system. The air suspension system includes a low-pressure air tank and a high-pressure air tank; the high-pressure air tank is used to supply air to the air springs in the air suspension system; the low-pressure air tank is used to supply air to the on-board intelligent system.

[0071] S201: receiving a gas supply request sent by the vehicle-mounted intelligent system.

[0072] Among them, the on-board intelligent system may include modules with multiple functions, such as a tire inflation and deflation module, a headlight / radar cleaning module, or a seat massage module.

[0073] The air supply request of the vehicle-mounted intelligent system can be input by the user. When the tire needs to be inflated or deflated, the user operates the tire inflation and deflation module to obtain an air supply request. When the headlight or radar needs to be cleaned, the user operates the headlight / radar cleaning module to obtain an air supply request. When the seat massage needs to be turned on, the user operates the seat massage block to obtain an air supply request.

[0074] The air supply request of the vehicle-mounted intelligent system can also be input based on the vehicle's own judgment. When the tire pressure is detected to be high, an air supply request is generated. When the headlight or radar needs to be cleaned, an air supply request is generated. When the user needs a massage, an air supply request is generated.

[0075] S202: Determine whether the gas in the low-pressure gas storage tank meets the gas supply request.

[0076] S203: When the gas in the low-pressure gas storage tank meets the gas supply request, control the low-pressure gas storage tank to supply gas to the on-board intelligent system.

[0077] S204: When the gas in the low-pressure gas storage tank does not meet the gas supply request, control the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank.

[0078] The air suspension system includes a low-pressure gas tank and a high-pressure gas tank. The low-pressure gas tank is used to supply gas to the on-board intelligent system. When receiving a gas supply request sent by the on-board intelligent system, it is necessary to determine whether the gas in the low-pressure gas tank is sufficient to meet the gas supply request of the on-board intelligent system.

[0079] The method for determining whether the gas in the low-pressure gas storage tank meets the gas supply request may be: determining the pressure corresponding to the gas supply request, determining the pressure of the gas in the low-pressure gas storage tank based on the pressure sensor in the gas supply control system, comparing the pressure of the gas in the low-pressure gas storage tank with the pressure corresponding to the gas supply request, and when the pressure of the gas in the low-pressure gas storage tank is greater than or equal to the pressure corresponding to the gas supply request, determining that the gas in the low-pressure gas storage tank meets the gas supply request, and controlling the low-pressure gas storage tank to supply gas to the on-board intelligent system. When the pressure of the gas in the low-pressure gas storage tank is less than the pressure corresponding to the gas supply request, determining that the gas in the low-pressure gas storage tank does not meet the gas supply request, and controlling the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank.

[0080] After the high-pressure gas tank supplies gas to the low-pressure gas tank, it is determined again whether the gas in the low-pressure gas tank meets the gas supply request. If so, the low-pressure gas tank is controlled to supply gas to the on-board intelligent system.

[0081] Reference Figure 3 , is a schematic diagram of an air supply control system, which includes an air valve, a first switching valve, a second switching valve, a third switching valve, an air dryer and an air pump module.

[0082] The air valve includes AV1 valve, AV2 valve, AV3 valve and AV4 valve, wherein AV1 valve is connected to air spring 1 in the air suspension system, AV2 valve is connected to air spring 2 in the air suspension system, AV3 valve is connected to air spring 3 in the air suspension system, and AV4 is connected to air spring 4 in the air suspension system.

[0083] The first switching valve is SV1 valve, one end of the first switching valve SV1 valve is connected to the circuit of the air valve, and the other end of the first switching valve SV1 valve is connected to the air dryer AD of the air pump module 5. The air pump module 5 is connected to the air dryer AD, one end of the second switching valve SV3 is connected to the high-pressure air storage tank RES1, and the other end of the second switching valve SV3 is connected to the air pump module 5, one end of the third switching valve SV5 is connected to the low-pressure air storage tank RES2, and the other end of the third switching valve SV5 is connected to the circuit of the air valve.

[0084] The air pump module 5 includes a plurality of air pumps CM and a motor M.

[0085] When the high-pressure air tank supplies air to the air springs in the air suspension system, the second switching valve SV3, the air pump module 5, the air dryer AD, the first switching valve SV1 and the air valve are controlled to open, and air is supplied to the air spring corresponding to the air valve through the circuit formed by the second switching valve SV3, the air pump module 5, the air dryer AD, the first switching valve SV1 and the air valve.

[0086] When the gas in the low-pressure gas storage tank does not meet the gas supply request, the first switching valve SV1, the second switching valve SV3, the air dryer AD, the air pump module 5, the air dryer AD, and the third switching valve SV5 are controlled to open to control the high-pressure gas storage tank RES1 to supply gas to the low-pressure gas storage tank RES2.

[0087] Still refer to Figure 3 The air supply control system also includes a pressure sensor, which is connected to the first switching valve SV1.

[0088] When a gas supply request is received from the on-board intelligent system, the third switching valve SV5 is controlled to open so that the pressure sensor detects the pressure in the low-pressure gas tank RES1, thereby obtaining the pressure in the low-pressure gas tank, and comparing the pressure in the low-pressure gas tank with the pressure corresponding to the gas supply request to determine whether the gas in the low-pressure gas tank meets the gas supply request.

[0089] When the vehicle body is lowered based on the vehicle intelligent system and the air suspension system, Figure 4 As shown, the following steps are included:

[0090] S301: When receiving the first instruction, control the gas in each air spring of the air suspension system to enter the low-pressure air storage tank.

[0091] Among them, the first instruction instructs to control the vehicle body to descend.

[0092] S302: Control the exhaust system and / or the exhaust valve to discharge the gas in each air spring of the air suspension system.

[0093] like Figure 5 As shown, it is a schematic diagram of the air supply control system. The vehicle-mounted intelligent system includes an exhaust system 6, which can clean the headlights of the vehicle. The exhaust system 6 can also clean the radar of the vehicle. The air supply control system also includes an exhaust valve EV, which is connected to the atmosphere. The other end of the exhaust valve EV is connected to the air pump module 5 and the air dryer AD respectively.

[0094] When the first instruction for controlling the vehicle body to descend is received, in order to improve the recycling of gas in the air supply control system, the gas in each air spring is controlled to enter the low-pressure gas storage tank.

[0095] Specifically, the AV valve corresponding to each air spring is controlled to open, and the third switching valve SV5 is controlled to open, so that the gas in the air spring can be recovered by the low-pressure gas storage tank.

[0096] In some scenarios, in order to lower the height of the vehicle body more quickly, the exhaust system or the exhaust valve is opened at the same time to speed up the descent of the vehicle body.

[0097] Specifically, based on controlling the gas in each air spring in the air suspension system to enter the low-pressure air tank, and then based on the exhaust valve to discharge the gas in each air spring in the air suspension system, the fourth switching valve SV2, the air valve and the exhaust valve EV are controlled to open to control the discharge of gas in each air spring in the air suspension.

[0098] Specifically, based on controlling the gas in each air spring in the air suspension system to enter the low-pressure air tank, and then based on the exhaust system to discharge the gas in each air spring in the air suspension system, the exhaust system 6, the third switching valve SV5 and the air valve are controlled to open to discharge the gas in each air spring in the air suspension system.

[0099] When the vehicle body is lowered based on the vehicle intelligent system and the air suspension system, Figure 6 As shown, the following steps are included:

[0100] S401: When receiving the first instruction, control the gas in each air spring of the air suspension system to enter the low-pressure air storage tank.

[0101] S402: Control the exhaust system and / or the exhaust valve to discharge the gas in each air spring of the air suspension system.

[0102] S403: Determine the current vehicle speed.

[0103] S404: When the current vehicle speed is zero, control the tire inflation and deflation system to deflate the vehicle tires.

[0104] When the vehicle body needs to be lowered, the gas in the air spring is controlled to enter the low-pressure air storage tank, and then the gas in each air spring of the air suspension system is discharged by controlling the exhaust system and / or the exhaust valve.

[0105] When the vehicle speed is zero, in order to lower the vehicle body faster, the tire inflation and deflation system can be controlled to deflate the tires.

[0106] like Figure 7As shown, the on-board intelligent system also includes a tire inflation and deflation system 7. When the vehicle speed is zero, the AV valve and the third switching valve SV5 corresponding to each air spring are controlled to open, the fourth switching valve SV2, the air valve and the exhaust valve EV are controlled to open, the exhaust system 6 and the third switching valve SV5 are controlled to open, and the tire inflation and deflation system 6 is controlled to open, so that the tires can be deflated while the air springs are deflated, which can lower the vehicle body faster.

[0107] In addition to deflation of tires, the air supply control system can also supply air to tires, such as Figure 8 As shown, the following steps are included:

[0108] S501: When it is detected that the low-pressure air storage tank supplies air to the tire inflation and deflation system, the pressure of the tire of the vehicle is detected based on the pressure sensor.

[0109] S502: When the tire pressure reaches a preset pressure, close the third switching valve.

[0110] The low-pressure air tank is used to supply air to the on-board intelligent system. When the on-board intelligent system includes a tire inflation and deflation system, upon receiving an inflation command for the tire inflation and deflation system, the low-pressure air tank is controlled to supply air to the tire inflation and deflation system, the pressure of the inflated tire is determined, and the pressure is compared with a preset pressure. When the pressure of the inflated tire reaches the preset pressure, the third switching valve SV5 corresponding to the low-pressure air tank is closed, and the air supply to the tire inflation and deflation system is stopped.

[0111] like Fig. 9 As shown, the vehicle-mounted intelligent system also includes a seat massage system 8. When receiving the gas supply request sent by the seat massage system, it detects whether the gas in the low-pressure gas storage tank meets the gas supply request sent by the seat massage system. If it meets, the low-pressure gas storage tank is controlled to supply gas to the seat massage system. Specifically, the third switching valve SV5 is opened to allow the low-pressure gas storage tank to supply gas to the seat massage system. If it does not meet, the high-pressure gas storage tank is controlled to supply gas to the low-pressure gas storage tank.

[0112] When the gas in each of the air springs in the air suspension system is controlled to enter the low-pressure gas storage tank, when the low-pressure gas storage tank can no longer store gas, the gas in the low-pressure gas storage tank is discharged to the high-pressure gas storage tank for storage, and when the high-pressure gas storage tank can no longer store gas, the gas can be discharged to the atmosphere through the exhaust valve EV and / or the exhaust system 6. This solves the problem that the low-pressure gas storage tank has a small capacity and needs to start multiple solenoid valves and air pumps for exhaust.

[0113] The gas supply control system also has overpressure protection function, such as Fig.10 As shown, the following steps are included:

[0114] S601: When the high-pressure air storage tank supplies air to the air springs in the air suspension system, determine a first pressure at each location in the air suspension system.

[0115] S602: When any first pressure is greater than a preset pressure, control the exhaust valve to open.

[0116] The existing method of overpressure protection is to set a power limiting valve in the gas supply control system. When the pressure is too high, the gas is discharged through the power limiting valve, or the internal structure of the exhaust valve EV is changed to replace the function of the power limiting valve. When overpressure protection is performed based on the power limiting valve, the power limiting valve will only open when the pressure meets the threshold set by the power limiting valve. At this time, the pressure is already high. Therefore, the existing method has hysteresis and cannot perform overpressure protection in time.

[0117] In order to solve the above problems, during the process of the high-pressure air tank supplying air to the air spring, the sensor of the air supply control system performs real-time pressure detection on various parts of the circuit. When it is detected that any first pressure is greater than the preset pressure, the exhaust valve EV is controlled to open for overpressure protection.

[0118] In the present application, in addition to exhausting the exhaust valve EV for overpressure protection, the pressure can also be discharged through the exhaust system.

[0119] In another way of overpressure protection, the pressure change rate at various locations in the air suspension system can be determined in real time. When the pressure change rate at a certain location is higher than a preset rate, the exhaust valve EV or the exhaust system 6 is controlled to open in advance to release pressure.

[0120] Please refer to Fig.11 The present application embodiment also provides an application Figure 1 The air supply control device 110 of the air suspension of the inflation control system 100, the air supply control system also includes an air suspension system and an on-board intelligent system, the air suspension system includes a low-pressure air storage tank and a high-pressure air storage tank; the high-pressure air storage tank is used to supply air to the air spring in the air suspension system; the low-pressure air storage tank is used to supply air to the on-board intelligent system, and the air supply control device 110 of the air suspension includes:

[0121] The receiving module 111 is used to receive the gas supply request sent by the vehicle-mounted intelligent system;

[0122] A determination module 112, configured to determine whether the gas in the low-pressure gas storage tank satisfies the gas supply request;

[0123] The control module 113 is used to control the low-pressure gas storage tank to supply gas to the on-board intelligent system when the gas in the low-pressure gas storage tank meets the gas supply request; when the gas in the low-pressure gas storage tank does not meet the gas supply request, control the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank.

[0124] The present application also provides an air supply control system 100, which includes a controller 130 and a memory 120. The memory 120 stores computer executable instructions, and when the computer executable instructions are executed by the controller 130, the air supply control method of the air suspension is implemented.

[0125] The embodiment of the present application further provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by the controller 130, the air supply control method of the air suspension is implemented.

[0126] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0127] In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part. If the function is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk.

[0128] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0129] The above are only various implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An air supply control method for an air suspension, characterized in that: A controller applied to an air supply control system, wherein the air supply control system further comprises an air suspension system and an on-board intelligent system, wherein the air suspension system comprises a low-pressure air storage tank and a high-pressure air storage tank; the high-pressure air storage tank is used to supply air to an air spring in the air suspension system; The low-pressure gas storage tank is used to supply gas to the vehicle-mounted intelligent system, and the method includes: Receiving a gas supply request sent by the vehicle-mounted intelligent system; Determining whether the gas in the low-pressure gas storage tank meets the gas supply request; When the gas in the low-pressure gas storage tank meets the gas supply request, controlling the low-pressure gas storage tank to supply gas to the on-board intelligent system; When the gas in the low-pressure gas storage tank does not meet the gas supply request, the high-pressure gas storage tank is controlled to supply gas to the low-pressure gas storage tank.

2. The method according to claim 1, characterized in that The air supply control system comprises an air valve, a first switching valve, a second switching valve, a third switching valve, an air dryer and an air pump module, one end of the first switching valve is connected to a circuit of the air valve, the other end of the first switching valve is connected to the air pump module, the air pump module is connected to the air dryer, one end of the second switching valve is connected to the high-pressure air storage tank, the other end of the second switching valve is connected to the air pump module, one end of the third switching valve is connected to the low-pressure air storage tank, and the other end of the third switching valve is connected to the circuit of the air valve; When the gas in the low-pressure gas storage tank does not meet the gas supply request, the step of controlling the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank comprises: When the gas in the low-pressure gas storage tank does not meet the gas supply request, the first switching valve, the second switching valve, the air dryer, the air pump module and the third switching valve are controlled to open to control the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank.

3. The method according to claim 1, characterized in that The air supply control system further includes an exhaust valve, the vehicle-mounted intelligent system includes an exhaust system, and the method further includes: Upon receiving a first instruction, controlling the gas in each of the air springs in the air suspension system to enter the low-pressure gas storage tank, wherein the first instruction instructs controlling the vehicle body to descend; The exhaust system and / or the exhaust valve are controlled to exhaust the gas in each of the air springs in the air suspension system.

4. The method according to claim 3, characterized in that The air supply control system includes a third switching valve and an air valve, the air valve is connected to the air spring in the air suspension system, one end of the third switching valve is connected to the low-pressure air storage tank, and the other end of the third switching valve is connected to the circuit of the air valve. When receiving the first instruction, the step of controlling the gas in each of the air springs in the air suspension system to enter the low-pressure air storage tank includes: The third switching valve and the air valve are controlled to open so that the gas in each of the air springs in the air suspension system enters the low-pressure air storage tank.

5. The method according to claim 4, characterized in that The air supply control system includes an exhaust valve, the air pump module is connected to the exhaust valve, a fourth switching valve is provided on the loop connecting the air pump module and the air valve loop, and the exhaust valve is connected to the atmosphere; The step of controlling the exhaust system and / or the exhaust valve to discharge the gas in each of the air springs in the air suspension system comprises: Controlling the fourth switching valve, the air valve and the exhaust valve to open so that the gas in each of the air springs in the air suspension system is discharged; and / or; The exhaust system, the third switching valve and the air valve are controlled to open so that the gas in each of the air springs in the air suspension system is discharged.

6. The method according to claim 3, characterized in that The vehicle-mounted intelligent system also includes a tire inflation and deflation system, and the method further includes: Determine the current vehicle speed; When the current vehicle speed is zero, the tire inflation and deflation system is controlled to deflate the vehicle tires.

7. The method according to claim 6, characterized in that The gas supply control system includes a third switching valve, the third switching valve is connected to the low-pressure gas storage tank, the gas control system also includes a pressure sensor, and the method further includes: When it is detected that the low-pressure air storage tank supplies air to the tire inflation and deflation system, detecting the pressure of the tire of the vehicle based on the pressure sensor; When the tire pressure reaches a preset pressure, the third switching valve is closed.

8. The method according to claim 3, characterized in that The method further comprises: During the process of exhausting the gas from the low-pressure gas storage tank to the high-pressure gas storage tank, determining the pressure of the high-pressure gas storage tank; When the pressure of the high-pressure gas storage tank reaches a preset pressure, the exhaust system is controlled to exhaust gas to the atmosphere.

9. The method according to claim 5, characterized in that The method further comprises: When the high-pressure air storage tank supplies air to the air spring in the air suspension system, determining a first pressure at each location in the air suspension system; When any of the first pressures is greater than a preset pressure, the exhaust valve is controlled to open.

10. A control device for an air suspension, characterized in that: A controller applied to an air supply control system, wherein the air supply control system further comprises an air suspension system and an on-board intelligent system, wherein the air suspension system comprises a low-pressure air storage tank and a high-pressure air storage tank; the high-pressure air storage tank is used to supply air to an air spring in the air suspension system; The low-pressure gas storage tank is used to supply gas to the vehicle-mounted intelligent system, and the device includes: A receiving module, used for receiving a gas supply request sent by the vehicle-mounted intelligent system; A determination module, used to determine whether the gas in the low-pressure gas storage tank meets the gas supply request; The control module is used to control the low-pressure gas storage tank to supply gas to the on-board intelligent system when the gas in the low-pressure gas storage tank meets the gas supply request; and control the high-pressure gas storage tank to supply gas to the low-pressure gas storage tank when the gas in the low-pressure gas storage tank does not meet the gas supply request.

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