Central inflation and deflation system and method for vehicle, and vehicle comprising central inflation and deflation system

Abstract

A central inflation and deflation system (100) and method for a vehicle, and a vehicle. The system (100) comprises: an air source (10); a control valve module (20) comprising an air source valve (21) and a back-pressure valve assembly which are connected in parallel, and a wheel position valve (22) connected in series with the air source valve (21) and the back-pressure valve assembly, wherein the air source (10) is sequentially connected to the air source valve (21) and the wheel position valve (22) by means of an inflation tube (41); and a wheel assembly (30), wherein the wheel assembly (30) comprises wheels (31) and a rim valve (33). The wheel position valve (22) is sequentially connected to the rim valve (33) and the wheels (31) by means of a communication tube (43); the back-pressure valve assembly comprises a back-pressure valve (23) and an exhaust valve (24); the wheel position valve (22) is sequentially connected to the back-pressure valve (23) and the exhaust valve (24) by means of an exhaust tube (42); and the back pressure value of the back-pressure valve (23) is not less than an opening pressure value of the rim valve (33).

Description

Central inflation and deflation system of vehicle, method and vehicle with same

[0001] The present application claims priority to the Chinese patent application No. 202410892733.4, filed on July 04, 2024, and entitled "Central inflation and deflation system of vehicle, method and vehicle with same", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to, but not limited to, the technical field of vehicle, in particular to a central inflation and deflation system of vehicle, method and vehicle with same. BACKGROUND

[0003] The background section provided herein is merely for information and is not necessarily prior art.

[0004] When the vehicle is running on special road surfaces such as sand, snow, mud, etc., the central inflation and deflation system of the vehicle needs to adjust the tire pressure according to the different road conditions in order to improve the passability of the vehicle, and then adjust the tire to the normal tire pressure when the vehicle is running on normal road surface.

[0005] However, in actual use, the central inflation and deflation system of the vehicle has the disadvantages of complexity, large volume and heavy weight, therefore, the central inflation and deflation system of the vehicle is mainly applied to trucks, military vehicles and some off-road modified vehicles, and is rarely applied to passenger vehicles. SUMMARY

[0006] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. The present application provides a central inflation and deflation system of vehicle, method and vehicle with same, and the following introduces each aspect related to the present application.

[0007] In a first aspect, the present application provides a central inflation and deflation system of vehicle, the central inflation and deflation system comprising: a gas source; a control valve module comprising a gas source valve and a back pressure valve group arranged in parallel, and a wheel position valve connected in series with the gas source valve and the back pressure valve group, the gas source being connected with the gas source valve and the wheel position valve in sequence through an inflation pipe; a wheel assembly, the wheel assembly comprising a wheel and a wheel edge valve, the wheel position valve being connected with the wheel edge valve and the wheel in sequence through a communication pipe; the back pressure valve group comprising a back pressure valve and an exhaust valve, the wheel position valve being connected with the back pressure valve and the exhaust valve in sequence through an exhaust pipe, the back pressure value of the back pressure valve being not less than the opening pressure value of the wheel edge valve.

[0008] In an embodiment of the present application, the gas source valve, the back pressure valve, the wheel position valve, the wheel edge valve and the exhaust valve are all arranged as single-channel on-off valves.

[0009] In an embodiment of the present application, the air source is an air compressor of an air spring of the vehicle, the air compressor is provided with an air inlet and an air outlet, the air compressor is connected to the air inlet of the air filling pipe and is capable of discharging the air in the air filling pipe and the communication pipe through the air outlet.

[0010] In an embodiment of the present application, the air outlet of the air compressor and the air outlet of the air exhaust valve are both arranged on the frame of the vehicle through the air pipe and are higher than the wheel assembly.

[0011] In an embodiment of the present application, the wheel assembly further comprises a rotary sealing bearing, the rotary sealing bearing is arranged on the wheel, one side of the rotary sealing bearing is connected to the wheel position valve through one communication pipe, and the other side of the rotary sealing bearing is connected to the wheel rim valve through another communication pipe.

[0012] In an embodiment of the present application, the central air filling and discharging system further comprises an air pressure sensor and a control unit, the air pressure sensor is used to monitor the tire pressure value of the wheel and the air pressure value of the communication pipe, and the control unit controls the opening and closing of the air source valve, the wheel position valve, the wheel rim valve and the air exhaust valve according to the tire pressure value and the air pressure value monitored by the air pressure sensor.

[0013] In a second aspect, the embodiments of the present application further provide a central air filling and discharging method of a vehicle, the central air filling and discharging method is implemented by a central air filling and discharging system, the air exhaust pipe of the central air filling and discharging system is provided with a back pressure valve located upstream of the air exhaust valve, and the central air filling and discharging method comprises the following steps: obtaining a real-time tire pressure and a required tire pressure of the vehicle; according to the real-time tire pressure being greater than the required tire pressure, controlling the air source valve and the wheel position valve of the central air filling and discharging system to be opened; according to the air pressure of the communication pipe of the central air filling and discharging system being greater than the opening pressure of the wheel rim valve, confirming that the wheel rim valve is in an open state; controlling the air source valve to be closed and the back pressure valve and the air exhaust valve to be opened, and the wheel sequentially discharges air through the wheel rim valve, the communication pipe, the wheel position valve, the air exhaust pipe, the back pressure valve and the air exhaust valve until the real-time tire pressure of the wheel is equal to the required tire pressure.

[0014] In an embodiment of the present application, the central air filling and discharging method further comprises the following steps: after the real-time tire pressure of the wheel is equal to the required tire pressure, controlling the air exhaust valve to be closed and the air source valve and the air outlet of the air source to be opened, discharging the air in the communication pipe through the wheel position valve, the air source valve and the air outlet of the air source, and restoring the wheel rim valve to a closed state.

[0015] In an embodiment of the present application, the central air filling and discharging method further comprises the following steps: according to the real-time tire pressure being less than the required tire pressure, controlling the air source valve, the wheel position valve and the wheel rim valve of the central air filling and discharging system to be opened, and filling the wheel with air by the air source until the real-time tire pressure is equal to the required tire pressure.

[0016] In a third aspect, the embodiments of the present application further provide a vehicle, which comprises the central air filling and discharging system of the vehicle according to the first aspect of the present application.

[0017] The central inflation and deflation system of the vehicle provided by the embodiment of the application can maintain the air pressure value in the communication pipe at a state greater than the opening pressure value of the wheel valve through the back pressure valve, so that the air in the wheel can be discharged through the wheel valve, the communication pipe, the wheel valve, the exhaust pipe, the back pressure valve and the exhaust valve, thereby achieving the purpose of adjusting the tire pressure of the wheel, reducing the complexity of the control valve module, and thereby reducing the complexity of the central inflation and deflation system.

[0018] Other aspects can become apparent from a review of the drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Fig. 1 is a schematic block diagram of the central inflation and deflation system of the vehicle according to the embodiment of the present application;

[0021] Fig. 2 is a schematic diagram of the partial structure of the central inflation and deflation system of the vehicle shown in Fig. 1;

[0022] Fig. 3 is a flow chart of the central inflation and deflation method of the vehicle according to the embodiment of the present application.

[0023] In the drawings, the reference signs are as follows: 100, central inflation and deflation system; 10, air source; 11, exhaust port; 20, control valve module; 21, air source valve; 22, wheel valve; 23, back pressure valve; 24, exhaust valve; 25, air pressure sensor; 30, wheel assembly; 31, wheel; 32, rotary sealing bearing; 33, wheel valve; 41, inflation pipe; 42, exhaust pipe; 43, communication pipe; 44, common pipe; 45, tee joint; 50, control unit; 60, operation module. DETAILED DESCRIPTION

[0024] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be thoroughly understood and fully conveyed to those skilled in the art.

[0025] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, elements, components, and / orintegers but do not preclude the presence or addition of one or more other features, elements, components, integers, and / or groups thereof.

[0026] Although the terms first, second, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. In addition, in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "set", "connected" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection, can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In order to facilitate the description, spatial relative terms can be used in the description to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "end", "in", "out", "bottom", etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation in addition to the orientation depicted in the figure. For example, if the mechanism in the figure is turned over, the element described as "under" or "below" the other element or feature will be subsequently oriented "above" or "over" the other element or feature. Therefore, the example term "below" can include both up and down orientations. The mechanism can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0028] When the vehicle travels on special road surfaces such as sand, snow, mud, etc., in order to enable the vehicle to maintain excellent passability on complex road conditions, the central inflation system emerges. The central inflation system of the vehicle needs to adjust the tire pressure according to the different road conditions in order to improve the passability of the vehicle. When the vehicle travels on normal road surface, the tire is adjusted to normal tire pressure again. The central inflation system generally consists of air source, control system, distribution valve system, wheel edge valve and air pipeline.

[0029] The current central inflation and deflation system is mainly applied to military vehicles, mining vehicles and some large trucks. Due to its complex structure, heavy weight and huge space requirement, the technology has not been expanded to passenger vehicles.

[0030] The central inflation and deflation system of the related art can control the opening of the wheel valve by the high pressure of the main pipe to realize the inflation of the wheel, and control the opening of the wheel valve of the wheel by the low pressure of the main pipe to realize the deflation of the wheel by the pressure difference between the tire and the main pipe. Especially, the low pressure during the deflation of the main pipe needs to be connected in parallel with an electromagnetic valve + pressure regulating valve in the air pipe to realize the conversion of the high pressure in the air source into low pressure, and needs to be matched with a wheel valve with an exhaust port to realize the deflation through the wheel valve. This design leads to a complex control valve module of the central inflation and deflation system, resulting in the disadvantages of complexity, large size and heavy weight of the central inflation and deflation system.

[0031] In view of the above problems, the embodiments of the present application provide a central inflation and deflation system of a vehicle, which can make the gas in the wheel be discharged through the wheel valve, the communication pipe, the wheel valve, the exhaust pipe, the back pressure valve and the exhaust valve, so as to achieve the purpose of adjusting the tire pressure of the wheel, and reduce the complexity of the control valve module. As shown in FIG. 1 and FIG. 2, the central inflation and deflation system 100 of the vehicle provided by the embodiments of the present application includes an air source 10, a control valve module 20 and a wheel assembly 30. The control valve module 20 includes an air source valve 21 and a back pressure valve group connected in parallel, and a wheel valve 22 connected in series with the air source valve 21 and the back pressure valve group. The air source 10 is connected with the air source valve 21 and the wheel valve 22 in sequence through an inflation pipe 41. The wheel assembly 30 includes a wheel 31 and a wheel valve 33. The wheel valve 22 is connected with the wheel valve 33 and the wheel 31 in sequence through a communication pipe 43. The back pressure valve group includes a back pressure valve 23 and an exhaust valve 24. The wheel valve 22 is connected with the back pressure valve 23 and the exhaust valve 24 in sequence through an exhaust pipe 42. The back pressure value of the back pressure valve 23 is not less than the opening pressure value of the wheel valve 33.

[0032] It should be noted that "FL" in FIG. 1 refers to the wheel valve of Front Left (left front wheel), "FR" refers to the wheel valve of Front Right (right front wheel), "RL" refers to the wheel valve of Rear Left (left rear wheel), and "RR" refers to the wheel valve of Rear Right (right rear wheel).

[0033] In the embodiment, the central inflation and deflation system 100 of the vehicle can maintain the air pressure value in the communication pipe 43 to be greater than the opening pressure value of the wheel valve 33 through the back pressure valve 23, so that the gas in the wheel 31 can be discharged through the wheel valve 33, the communication pipe 43, the wheel valve 22, the exhaust pipe 42, the back pressure valve 23 and the exhaust valve 24, so as to achieve the purpose of adjusting the tire pressure of the wheel 31, and the complexity of the control valve module 20 is reduced. Specifically, as shown in FIG. 1, the inflation pipe 41 is arranged in communication with the air source valve 21, the exhaust pipe 42 is arranged in communication with the exhaust valve 24, and the inflation pipe 41 and the exhaust pipe 42 are collected to the common pipe 44 through the three-way joint 45, and the common pipe 44 is in communication with the communication pipe 43 through the wheel valve 22, so as to realize the effect of inflation and deflation through the common pipe 44.

[0034] The embodiment of the application optimizes the design of the control valve module 20, simplifies the control valve module 20, the various pipelines, the control wire harness and the wheel valve 33, and realizes the miniaturization effect of the central inflation and deflation system 100, so that the central inflation and deflation system 100 is more easily applied to passenger cars, improves the driving safety and passability of the passenger cars, and improves the adaptability of the passenger cars to various road conditions.

[0035] Specifically, the central inflation and deflation system 100 of the embodiment mainly comprises an air source 10, a control valve module 20 and a wheel assembly 30, and the central inflation and deflation system 100 can adjust the tire pressure of the vehicle according to the actual road condition, so as to improve the passability of the vehicle to different road conditions.

[0036] One wheel valve 22 is arranged corresponding to one wheel 31, which is used to adjust the tire pressure of each wheel 31 according to the actual use condition. For example, four wheels 31 of a four-wheel vehicle are provided with one-to-one four wheel valves 22.

[0037] The back pressure valve 23 is arranged in the exhaust pipe 42, which can open the exhaust pipe 42 under the air pressure of the gas in the exhaust pipe 42, and can maintain the air pressure in the exhaust pipe 42 in a preset pressure value range, so that the wheel valve 33 can be maintained in an open state in the preset pressure value range.

[0038] The wheel valve 33 is arranged to be controlled by air pressure, and has a minimum opening pressure, which depends on the set minimum deflation pressure. For example, the minimum opening pressure can be set to 80kpa, and the pressure can be maintained at 400kpa, so as to realize the sealing effect of the tire.

[0039] The control valve module 20 of the embodiment of the present application is integrated with multiple wheel position valves 22 to realize separate control of different wheels 31, and is integrated with a back pressure valve 23 upstream of the exhaust valve 24, and the air pressure inside the exhaust pipe 42 during exhaust is realized through the back pressure valve 23, so as to ensure that the wheel edge valve 33 is in an open state during the exhaust process of the wheel 31, and the air inside the wheel 31 can be discharged through the wheel edge valve 33, thereby simplifying the overall structure and complexity of the control valve module 20.

[0040] It should be noted that the specific structure of the back pressure valve 23 is not limited in the embodiment of the present application, because the application point of the present application is to set the back pressure valve 23 in the exhaust pipe 42, so that an additional electromagnetic valve and pressure regulating valve are not needed, and the wiring harness and pipeline arrangement are simplified, and the specific structure of the back pressure valve 23 includes multiple embodiments, such as an overflow type back pressure valve 23 and a narrow valve type back pressure valve 23, which are optional embodiments of the present application, and will not be introduced one by one here.

[0041] The specific embodiments of the central inflation and deflation system 100 of the embodiment of the present application will be described in detail below.

[0042] As shown in FIGS. 1 and 2, in some embodiments, the air source valve 21, the back pressure valve 23, the wheel position valve 22, the wheel edge valve 33 and the exhaust valve 24 are all set as single-channel on-off valves.

[0043] In the embodiment, by adopting the technical solution of the present application, the structure of each control valve in the central inflation and deflation system 100 can be simplified, for example, each control valve can be set as a single-channel on-off valve, which not only can simplify the structure of each control valve, but also can simplify the control of the central inflation and deflation system 100 on each control valve, and reduce the risk of misoperation caused by complex control.

[0044] Specifically, the wheel edge valve 33 is set as a single-channel on-off valve controlled by air pressure, and the wheel edge valve 33 can overcome the spring force of the wheel edge valve 33 to achieve the purpose of opening and closing through the air pressure in the communication pipe 43, without the need for control by the control system, and has the advantages of simple structure and light weight, and the wheel edge valve 33 can design the minimum opening pressure and the maximum pressure retention value according to the vehicle demand, so as to improve the working reliability of the wheel edge valve 33.

[0045] As shown in FIG. 1, in some embodiments, the air source 10 is set as an air compressor of the air spring of the vehicle, the air compressor is provided with an inflation port and an exhaust port 11, the air compressor ventilates the inflation pipe 41 through the inflation port, and can discharge the gas in the communication pipe 43 and the inflation pipe 41 through the exhaust port 11.

[0046] In the embodiment, the air source 10 can directly use the air compressor, pipeline, control unit 50 and wire harness of the air spring, without complex circuit arrangement and pipeline arrangement, thereby improving the generalization rate of the air source 10.

[0047] Specifically, the central inflation and deflation system 100 is used for inflating the wheel 31, that is, the air line as shown in FIG. 1, the compressor generates high-pressure gas, the control unit 50 controls the air source valve 21 and the wheel position valve 22 to be opened, the high-pressure gas generated by the air source 10 opens the wheel edge valve 33, the pressure of the high-pressure gas is higher than the tire pressure of the wheel 31, and the high-pressure gas is filled into the wheel 31 through the wheel edge valve 33, so as to realize the inflation of the wheel 31.

[0048] The central inflation and deflation system 100 is used for deflating the wheel 31, that is, the air line as shown in FIG. 1, the compressor generates high-pressure gas, the control unit 50 controls the air source valve 21 and the wheel position valve 22 to be opened, and the high-pressure gas generated by the air source 10 opens the wheel edge valve 33; the deflation line as shown in FIG. 1, the compressor and the air source valve 21 are closed, at this time, the tire of the wheel 31 is communicated with the communication pipe 43, then the deflation valve 24 is opened, the gas in the tire is discharged through the deflation valve 24, because the back pressure valve 23 generates back pressure in the communication pipe 43, the wheel edge valve 33 can be kept in an open state, and stable deflation of the tire through the wheel edge valve 33 can be realized, when the tire reaches the set or expected tire pressure, the deflation valve 24 is closed, the air source valve 21 is opened, the gas in the pipeline is rapidly depressurized through the exhaust port 11 of the compressor, the wheel edge valve 33 is closed by the spring force of the wheel edge valve 33, and the central inflation and deflation system 100 returns to a stable state.

[0049] As shown in FIGS. 1 and 2, in some embodiments, the exhaust port 11 of the air compressor and the exhaust port of the deflation valve 24 are arranged on the vehicle frame through the air pipe and are higher than the wheel assembly 30.

[0050] In the embodiment, by using the central inflation and deflation system 100 of the application, the wheel end of the wheel 31 is free of the exhaust port, and the only air holes connected with the outside in the central inflation and deflation system 100 are the inlet and outlet ports of the compressor and the exhaust port of the deflation valve 24. In order to improve the water crossing ability of the central inflation and deflation system 100, the inlet and outlet ports of the compressor and the exhaust port of the deflation valve 24 are arranged at a high position of the vehicle frame through the air pipe, so as to reduce the water inlet phenomenon of the inlet and outlet ports of the compressor and the exhaust port of the deflation valve 24.

[0051] As shown in FIGS. 1 and 2, in some embodiments, the wheel assembly 30 further includes a rotary sealing bearing 32, the rotary sealing bearing 32 is arranged on the wheel 31, one side of the rotary sealing bearing 32 is communicated with the wheel position valve 22 through a communication pipe 43, and the other side of the rotary sealing bearing 32 is communicated with the wheel edge valve 33 through another communication pipe 43.

[0052] In the embodiment, the rotary sealing bearing 32 can achieve the purpose of transferring gas from the vehicle body static side to the wheel end rotating side, and can also play a role in sealing air, while ensuring that the rolling resistance of the rotary sealing bearing 32 is as low as possible to ensure the normal endurance of the vehicle.

[0053] The embodiment of the present application proposes that after the wheel 31 is completed, the air in the communication pipe 43 and the inflation pipe 41 is discharged through the exhaust port 11 of the gas source 10, so as to reduce the air pressure in the communication pipe 43 and the air pressure on both sides of the rotary sealing bearing 32 when the wheel 31 is not inflated, exhausted and tire pressure detected, thereby reducing the rolling resistance of the rotary sealing bearing 32, reducing the wear of the sealing element of the rotary sealing bearing 32, and improving the endurance of the vehicle.

[0054] As shown in FIGS. 1 and 2, in some embodiments, the central inflation and deflation system 100 further comprises a gas pressure sensor 25 and a control unit 50, the gas pressure sensor 25 is used to monitor the tire pressure value of the wheel 31 and the air pressure value of the communication pipe 43, and the control unit 50 controls the opening and closing of the gas source valve 21, the wheel position valve 22, the wheel edge valve 33 and the exhaust valve 24 according to the tire pressure value and the air pressure value monitored by the gas pressure sensor 25.

[0055] In the embodiment, the gas pressure sensor 25 is integrated in the control valve module 20, and the control unit 50 can detect the air pressure in the communication pipe 43 and / or the tire in real time through the gas pressure sensor 25 during the inflation and deflation process of the wheel 31, so as to achieve the timely opening and closing of the gas source valve 21, the wheel position valve 22, the wheel edge valve 33 and the exhaust valve 24.

[0056] Specifically, during the inflation process of the wheel 31, the real-time tire pressure data of the wheel 31 cannot be accurately measured due to the influence of the pressure of the gas source 10, therefore, the gas source valve 21 needs to be closed during the inflation process of the wheel 31, and the real-time tire pressure data of the wheel 31 is detected by the gas pressure sensor 25 after the air pressure in the communication pipe 43 and the tire of the wheel 31 is balanced.

[0057] As shown in FIGS. 1-3, the application also provides a central inflation and deflation method of a vehicle. The central inflation and deflation method is implemented by a central inflation and deflation system 100. The exhaust pipe 42 of the central inflation and deflation system 100 is provided with a back pressure valve 23 upstream of the exhaust valve 24. The central inflation and deflation method comprises: obtaining the real-time tire pressure and the required tire pressure of the vehicle; according to the real-time tire pressure being greater than the required tire pressure, controlling the air source valve 21 and the wheel position valve 22 of the central inflation and deflation system 100 to open; according to the air pressure of the communication pipe 43 of the central inflation and deflation system 100 being greater than the opening pressure of the wheel valve 33, confirming that the wheel valve 33 is in an open state; controlling the air source valve 21 to close, and controlling the back pressure valve 23 and the exhaust valve 24 to open, and the wheel 31 is sequentially deflated through the wheel valve 33, the communication pipe 43, the wheel position valve 22, the exhaust pipe 42, the back pressure valve 23 and the exhaust valve 24, until the real-time tire pressure of the wheel 31 is equal to the required tire pressure.

[0058] In this embodiment, the user can set the required tire pressure of the wheel 31 through the operation module 60 of the central inflation and deflation system 100, such as the central control entertainment screen, or when the tire pressure monitored by the tire pressure monitoring system is higher than the normal value, the control unit 50 of the central inflation and deflation system 100 sends a start signal, the central inflation and deflation system 100 controls the air compressor to start, the control unit 50 of the central inflation and deflation system 100 controls the air source valve 21 and the wheel position valve 22 corresponding to the wheel 31 to open, the compressed gas generated by the air compressor opens the wheel valve 33 after passing through the rotary sealing bearing 32, and the tire of the wheel 31 is communicated with the communication pipe 43, then the air source valve 21 and the air compressor are closed, the back pressure valve 23 and the exhaust valve 24 are opened, the air in the tire cavity is communicated with the outside to deflate, at the same time, the back pressure value of the back pressure valve 23 can ensure that the air pressure of the communication pipe 43 is not lower than the opening pressure of the wheel valve 33, and the effect that the tire of the wheel 31 can continuously and automatically deflate can be achieved.

[0059] In some embodiments, until the real-time tire pressure of the wheel 31 is equal to the required tire pressure, further comprising: controlling the exhaust valve 24 to close, and controlling the air source valve 21 and the exhaust port 11 of the air source 10 to open, the gas in the communication pipe 43 is discharged through the wheel position valve 22, the air source valve 21 and the exhaust port 11 of the air source 10, and the wheel valve 33 returns to a closed state.

[0060] In this embodiment, during the deflation process of the wheel 31, the real-time tire pressure of the tire is detected in real time by the air pressure sensor 25, when the real-time tire pressure of the tire reaches the required tire pressure, the control unit 50 sends a signal to close the exhaust valve 24 and open the air source valve 21, so that the air pressure in the pipeline can be quickly discharged through the exhaust port 11 of the compressor, then the wheel valve 33 is automatically closed to achieve the purpose of maintaining the pressure of the tire, and finally the wheel position valve 22 and the air source valve 21 are closed in turn to complete the deflation process of the wheel 31.

[0061] In some embodiments, the central inflation and deflation method further comprises: according to the real-time tire pressure being less than the required tire pressure, controlling the air source valve 21, the wheel position valve 22 and the wheel edge valve 33 of the central inflation and deflation system 100 to be opened, and the air source 10 inflates the wheel 31 until the real-time tire pressure is equal to the required tire pressure.

[0062] In the embodiment, the user can set the required tire pressure of the wheel 31 through the operation module 60 such as the central control entertainment screen of the central inflation and deflation system 100, or when the tire pressure monitored by the tire pressure monitoring system is lower than the normal value, the control unit 50 of the central inflation and deflation system 100 sends a start signal, the central inflation and deflation system 100 controls the air compressor to start, the control unit 50 of the central inflation and deflation system 100 controls the air source valve 21 and the wheel position valve 22 corresponding to the wheel 31 to be opened, the compressed gas generated by the air compressor opens the wheel edge valve 33 after passing through the rotating sealing bearing 32, and the tire of the wheel 31 is communicated with the communication pipe 43, the high-pressure gas generated by the air compressor is filled into the cavity of the tire, and the central inflation and deflation system 100 performs the inflation operation on the wheel 31.

[0063] Further, the central inflation and deflation system 100 detects the real-time tire pressure of the tire in real time through the air pressure sensor 25, and when the real-time tire pressure reaches the required tire pressure, the control unit 50 sends a signal to close the air compressor, the air in the communication pipe 43 and the inflation pipe 41 can be quickly discharged through the exhaust port 11 of the compressor, then the wheel edge valve 33 is automatically closed to achieve the purpose of pressure maintaining of the tire, and finally the wheel position valve 22 and the air source valve 21 are closed in turn, and the inflation process of the wheel 31 is completed.

[0064] The application further provides a vehicle comprising the central inflation and deflation system 100 according to the application.

[0065] In the embodiment, the vehicle provided by the application has all the technical effects of the central inflation and deflation system 100 provided by the application, which will not be described here.

[0066] In addition, the embodiments of the application only focus on the structures of the central inflation and deflation system 100 of the vehicle related to the improvement points of the application, and do not mean that the central inflation and deflation system 100 of the vehicle of the application does not have other structures. For example, the central inflation and deflation system 100 of the vehicle further comprises an operation module 60 such as a touch display screen, and the like. These structures all belong to the protection scope of the central inflation and deflation system 100 of the vehicle of the application, and other structures of the central inflation and deflation system 100 of the vehicle will not be described here.

[0067] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A central tire inflation system of a vehicle, wherein, The central inflation and deflation system (100) comprises: an air source (10); a control valve module (20) comprising a gas source valve (21) and a back pressure valve group arranged in parallel, and a wheel position valve (22) connected in series with the gas source valve (21) and the back pressure valve group, the air source (10) being connected with the gas source valve (21) and the wheel position valve (22) in sequence through an inflation pipe (41); a wheel assembly (30) comprising a wheel (31) and a wheel edge valve (33), the wheel position valve (22) being connected with the wheel edge valve (33) and the wheel (31) in sequence through a communication pipe (43); the back pressure valve group comprises a back pressure valve (23) and an exhaust valve (24), the wheel position valve (22) being connected with the back pressure valve (23) and the exhaust valve (24) in sequence through an exhaust pipe (42), and the back pressure value of the back pressure valve (23) is not lower than the opening pressure value of the wheel edge valve (33).

2. The central tire inflation system of the vehicle of claim 1, wherein, The gas source valve (21), the back pressure valve (23), the wheel position valve (22), the wheel edge valve (33) and the exhaust valve (24) are all arranged as single-channel on-off valves.

3. The central tire inflation system of the vehicle of claim 2, wherein, The air source (10) is arranged as an air compressor of an air spring of the vehicle, the air compressor is provided with an inflation port and an exhaust port (11), the air compressor is ventilated to the inflation pipe (41) through the inflation port, and the air compressor can discharge the gas in the communication pipe (43) and the inflation pipe (41) through the exhaust port (11).

4. The central tire inflation system of the vehicle of claim 3, wherein, The exhaust port of the air compressor (11) and the exhaust port of the exhaust valve (24) are both arranged on the frame of the vehicle through air pipes and are higher than the wheel assembly (30).

5. The central tire inflation system of the vehicle of claim 4, wherein, The wheel assembly (30) further comprises a rotary sealing bearing (32), the rotary sealing bearing (32) is arranged on the wheel (31), one side of the rotary sealing bearing (32) is communicated with the wheel position valve (22) through a section of communication pipe (43), and the other side of the rotary sealing bearing (32) is communicated with the wheel edge valve (33) through another section of communication pipe (43).

6. The central tire inflation system of a vehicle according to any one of claims 1 to 5, wherein, The central inflation and deflation system (100) further comprises a gas pressure sensor (25) and a control unit (50), the gas pressure sensor (25) is used for monitoring the tire pressure value of the wheel (31) and the gas pressure value of the communication pipe (43), and the control unit (50) controls the opening and closing of the gas source valve (21), the wheel position valve (22), the wheel edge valve (33) and the exhaust valve (24) according to the tire pressure value and the gas pressure value monitored by the gas pressure sensor (25).

7. A central tire inflation method for a vehicle, wherein, The central inflation and deflation method is implemented by the central inflation and deflation system (100), the exhaust pipe (42) of the central inflation and deflation system (100) is arranged at the upstream of the back pressure valve (23) of the exhaust valve (24), and the central inflation and deflation method comprises: obtaining the real-time tire pressure and the required tire pressure of the vehicle; controlling the opening of the gas source valve (21) and the wheel position valve (22) of the central inflation and deflation system (100) according to that the real-time tire pressure is greater than the required tire pressure; According to the air pressure of the communication pipe (43) of the central inflation and deflation system (100) being greater than the opening pressure of the wheel valve (33), it is confirmed that the wheel valve (33) is in an open state; After the real-time tire pressure of the wheel (31) is equal to the required tire pressure, it further comprises:

8. The central air charging and discharging method of a vehicle according to claim 7, wherein, After the real-time tire pressure of the wheel (31) is equal to the required tire pressure, it further comprises: The communication pipe (43) is in a closed state, the wheel valve (33) is in an open state, the wheel position valve (22) is in a closed state, the back pressure valve (23) is in an open state, and the exhaust valve (24) is in an open state.

9. The central air charging and discharging method of a vehicle according to claim 7, wherein, According to the real-time tire pressure being less than the required tire pressure, the source valve (21), the wheel position valve (22) and the wheel valve (33) of the central inflation and deflation system (100) are controlled to be opened, and the source (10) inflates the wheel (31) until the real-time tire pressure is equal to the required tire pressure. The vehicle comprises the central inflation and deflation system (100) of the vehicle according to any one of claims 1 to 6.

10. A vehicle, wherein, ​

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