Central inflation and deflation system, pressure acquisition method and vehicle

Abstract

The invention relates to a central inflation and deflation system, a pressure obtaining method and a vehicle. The central inflation and deflation system comprises a first element and a second element, the at least one charged device is connected with the first element; the detection device is used for acquiring a first numerical value of the first element; and the controller is configured to output an air pressure compensation coefficient based on the first numerical value and output a target pressure value of at least one charged device based on the air pressure compensation coefficient. The first element is introduced, the target pressure value of the inflated device can be output according to the air pressure compensation coefficient obtained based on the first numerical value of the first element, repeated opening of an inflation pump or a deflation valve can be avoided, and then the efficiency of obtaining the pressure value of the inflated device can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of air pressure detection technology, and in particular, to a central air filling and deflation system, a pressure acquisition method, and a vehicle. Background Art

[0002] With the rapid development of the automotive industry, people's requirements for vehicle safety and driving experience have also increased. Centralized inflation and deflation systems, which can inflate and deflate vehicles while they are stopped or moving, have gradually attracted attention. The basis for centralized inflation and deflation systems to achieve these functions is the acquisition of pressure values. Accurate pressure values ensure the accurate implementation of these functions. Therefore, how to obtain more accurate pressure values through centralized inflation and deflation systems is a technical problem that needs to be solved urgently. Summary of the Invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a central inflation and deflation system, a pressure acquisition method and a vehicle.

[0004] A first aspect of the present disclosure provides a central inflation and deflation system, the system comprising: first element; at least one charged device, the charged device being connected to the first component; a detection device, configured to obtain a first value of the first element; A controller is configured to output an air pressure compensation coefficient based on the first value, and output at least one target pressure value of the charged device based on the air pressure compensation coefficient.

[0005] Optionally, the first value includes a first pressure value and a first volume of the first element, and the target pressure value is obtained by correcting the first pressure value using the air pressure compensation coefficient; The air pressure compensation coefficient includes a first compensation coefficient and a second compensation coefficient. The first compensation coefficient is a compensation coefficient obtained when the inflated device is in an inflated state, and the second compensation coefficient is a compensation coefficient obtained when the inflated device is in a deflated state.

[0006] Optionally, the first compensation coefficient is determined according to the first pressure value, the second pressure value of the charged device, the first volume, and the second volume of the branch air path corresponding to the charged device.

[0007] Optionally, the first compensation coefficient is calculated according to the following formula: ; Wherein, C1 is the first compensation coefficient, P1 is the first pressure value, P TPMSis the second pressure value, V1 is the first volume, and V2 is the second volume.

[0008] Optionally, the controller is further configured to: obtaining a first proportional relationship between the second volume and the first volume; The first pressure value is corrected according to the first proportional relationship and the first compensation coefficient to obtain a target pressure value of the inflated device in the inflated state.

[0009] Optionally, the target pressure value is calculated according to the following formula: ; Wherein, P2 is the target pressure value, and k1 is the first proportional relationship.

[0010] Optionally, the central inflation and deflation system further comprises an air deflation valve, wherein the air deflation valve is connected to the inflated device and the first element respectively; The second compensation coefficient is determined according to the first pressure value, the second pressure value of the filled device, the first volume, the third volume of the filled device, and the fourth volume of the deflation valve.

[0011] Optionally, the second compensation coefficient is calculated according to the following formula: ; Wherein, C2 is the second compensation coefficient, P1 is the first pressure value, P TPMS is the second pressure value, V1 is the first volume, V3 is the third volume, and V4 is the fourth volume.

[0012] Optionally, the controller is configured to: obtaining a second proportional relationship between the third volume and the first volume, and obtaining a third proportional relationship between the fourth volume and the first volume; The first pressure value is corrected according to the second proportional relationship, the third proportional relationship, and the second compensation coefficient to obtain a target pressure value of the inflated device in the deflated state.

[0013] Optionally, the target pressure value is calculated according to the following formula: ; Wherein, P3 is the target pressure value, k2 is the second proportional relationship, k3 is the third proportional relationship, and P0 is the atmospheric pressure value.

[0014] Optionally, the inflated device includes a tire and / or an external inflated device.

[0015] Optionally, the first end of the first element is connected to each of the charged devices, and the second end of the first element is connected to the detection device.

[0016] A second aspect of the present disclosure provides a vehicle, comprising the central inflation and deflation system described in the first aspect.

[0017] The present disclosure provides a pressure acquisition method in three aspects, the method comprising: Obtaining a first value of a first component; An air pressure compensation coefficient is output based on the first value, and a target pressure value of at least one charged device is output based on the air pressure compensation coefficient.

[0018] In a fourth aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method described in the third aspect when the computer program is executed by a processor.

[0019] In a fifth aspect, the present disclosure provides a computer program product, comprising a computer program, which implements the method described in the third aspect when executed by a processor.

[0020] The present disclosure can output an air pressure compensation coefficient by utilizing the first value of the first element connected to the detection device in the central inflation and deflation system. The controller can output a target pressure value based on the air pressure compensation coefficient. Since the switching state of the inflation pump or the deflation valve does not change due to the operation of the detection device during the process of obtaining the target pressure value, the efficiency of obtaining the target pressure value can be improved to a certain extent, and the accuracy of obtaining the target pressure value can be achieved based on the air pressure compensation coefficient.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 The figure is a structural block diagram of a central inflation and deflation system according to an exemplary embodiment.

[0023] Figure 2 It is a structural block diagram of another central inflation and deflation system according to an exemplary embodiment.

[0024] Figure 3 It is a specific structural block diagram of another central inflation and deflation system according to an exemplary embodiment.

[0025] Figure 4FIG. 1 is an exemplary diagram showing a first volume and a second volume in another central inflation and deflation system according to an exemplary embodiment.

[0026] Figure 5 1 is an exemplary diagram showing a third volume and a fourth volume in another central inflation and deflation system according to an exemplary embodiment.

[0027] Figure 6 The figure is a flow chart showing a method for obtaining pressure according to an exemplary embodiment.

[0028] Figure 7 This is a flowchart illustrating an example of a process for obtaining an air pressure compensation coefficient in a pressure acquisition method according to an exemplary embodiment.

[0029] Figure 8 The present invention is a flowchart of correcting the air pressure value of an inflated device when inflating the inflated device in a pressure acquisition method according to an exemplary embodiment.

[0030] Figure 9 The present invention is a flowchart of correcting the air pressure value of an inflated device when the inflated device is deflated in a pressure acquisition method according to an exemplary embodiment.

[0031] Figure 10 is a block diagram of a pressure acquisition device according to an exemplary embodiment.

[0032] Figure 11 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0033] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0034] The following describes embodiments of the present disclosure in more detail with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0035] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0036] As used herein, the term "including" and its variations are open-ended, i.e., "including but not limited to." The term "based on" means "based, at least in part, on." The term "one embodiment" means "at least one embodiment," the term "another embodiment" means "at least one additional embodiment," and the term "some embodiments" means "at least some embodiments." Other terms are defined in the following description.

[0037] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0038] In related technologies, in order to flexibly adjust tire pressure, people have configured a central inflation and deflation system on the vehicle. This central inflation and deflation system can improve the adhesion of the tire by changing the tire pressure when the vehicle is driving on muddy, gravel, desert or snowy roads, thereby improving the vehicle's passability and comfort.

[0039] Accurately acquiring the real-time pressure of the external object or tire at the far end of the central air circuit during inflation and deflation is a major challenge for central air inflation and deflation systems. Related technologies primarily rely on the system's electronic control unit (ECU) to directly acquire pressure sensor values. Although the central air circuit and the external object or tire are connected, the rapid flow of high-pressure gas in the central air circuit during inflation and deflation causes the air pressure value collected by the pressure sensor to be in the form of fluid pressure. This fluid pressure can significantly differ from the actual pressure in the external object or tire.

[0040] Closing the air pump or slow-release valve can halt the inflation and deflation process, allowing the gas in the central air path to stabilize. The central air path pressure value collected by the air pressure sensor can then represent the real-time pressure value within the external object or tire. However, to obtain a more accurate real-time pressure value, this method requires repeatedly closing and opening the air pump or slow-release valve, which can affect inflation and deflation control efficiency to a certain extent.

[0041] In order to solve the above problems, an embodiment of the present disclosure proposes a central inflation and deflation system. The central inflation and deflation system of this method can obtain the target pressure value by utilizing the first value of the first element, while ensuring the accuracy of the pressure value acquisition and improving the efficiency of obtaining the target pressure value.

[0042] Figure 1 This is a block diagram of a central gas filling and deflation system according to an exemplary embodiment. Figure 1The central inflation and deflation system may include a first element 110, a detection device 120, a controller 130 and at least one device to be charged.

[0043] In the disclosed embodiment, the first end of the first element 110 can be connected to each charged device, and the second end can be connected to the first end of the detection device 120, and the connection between the two can be a pneumatic connection. The second end of the detection device 120 can be connected to the controller 130, and the connection between the two can be a circuit connection.

[0044] Here, the detection device 120 can indirectly obtain a target pressure value for each inflated device 140 by detecting the air pressure value of the first element 110. The target pressure value can be the actual pressure value of the inflated device obtained by correcting the pressure value of the first element acquired by the detection device. For example, the target pressure value can be the actual pressure value of a vehicle tire obtained by correcting the pressure value of the first element acquired by the pressure sensor.

[0045] The first element 110 may be a cavity or a component. For example, the first element 110 may be a cavity structure, which may also be referred to as a cavity compensation module, and may be a cylindrical cavity.

[0046] The detection device 120 can be used to obtain the first value of the first component 110. The detection device 120 can be installed at the end of the branch gas path of the first component 110, so that the air pressure value in the first component 110 can be directly collected. Exemplarily, the detection device 120 can be an air pressure sensor, which can be installed at the end of the branch gas path of the first component 110, so that the air pressure value in the first component 110 can be directly collected.

[0047] In some embodiments, the first value may include a first pressure value and a first volume of the first element. For example, the detection device 120 may be used to obtain the first pressure value of the first element 110. For another example, the detection device 120 may be used to obtain the first volume of the first element 110.

[0048] In other embodiments, the controller 130 may be configured to output a pressure compensation coefficient based on the first value obtained by the detection device 120, and output a target pressure value for at least one charged device based on the pressure compensation coefficient. Here, the controller 130 may be a system controller (ECU) or electronic control unit. The controller 130 may be connected to the detection device 120 via a circuit, and through this circuit connection, the controller 130 may directly obtain the pressure value in the central air circuit collected by the detection device 120.

[0049] Also, see Figure 2The central inflation and deflation system 100 may further include a deflation valve 150, which may be connected to the inflated device 140 and the first element 110, respectively. As described above, the first value may include the first pressure value and the first volume of the first element 110, and the target pressure value may be obtained by correcting the first pressure value using a pressure compensation coefficient.

[0050] Optionally, the air pressure compensation coefficient may include a first compensation coefficient and a second compensation coefficient, wherein the first compensation coefficient may be a compensation coefficient obtained when the inflated device 140 is in an inflated state, and the second compensation coefficient may be a compensation coefficient obtained when the inflated device is in a deflated state.

[0051] Specifically, the first compensation coefficient can be comprehensively determined based on the first pressure value of the first element, the second pressure value of the charged device, the first volume of the first element, and the second volume of the branch air path corresponding to the charged device.

[0052] Alternatively, the second compensation coefficient may be determined comprehensively based on the first pressure value of the first element, the second pressure value of the filled device, the first volume of the first element, the third volume of the filled device and the fourth volume of the deflation valve.

[0053] In order to better illustrate the process of obtaining the first compensation coefficient and the second compensation coefficient, the embodiment of the present disclosure provides a specific structural block diagram of the central inflation and deflation system, as shown in detail. Figure 3 As shown, based on Figure 3 It can be seen that the central inflation and deflation system 100 can include an electronic control unit 210, an integrated valve 220, an inflated component 230, an inflation pump 240 and corresponding system structure air circuits.

[0054] The embodiment of the present disclosure can be applied to a central gas filling and deflation system, and its specific structure can be as follows: Figure 3 As shown, based on Figure 3 As can be seen, the central inflation and deflation system 100 can be composed of an electronic control unit 210, an integrated valve 220, an inflated component 230, an inflation pump 240, and corresponding system structure air circuits. Among them, the electronic control unit 210 can be the above-mentioned controller, and the inflated component 230 can be the above-mentioned inflated device.

[0055] The integrated valve 220, inflated component 230 (e.g., wheel assembly), and air pump 240 of the central inflation / deflation system 100 can be connected via corresponding structural air paths to form the tire pressure regulation air path of the central inflation / deflation system 100. Furthermore, the air pump 240 and integrated valve 220 (external inflation interface) can be connected via corresponding structural air paths to form the external inflation air path of the central inflation / deflation system 100.

[0056] The integrated valve 220 may include multiple solenoid valves 221, an air pressure sensor 222, and a cavity element 223. For example, the integrated valve 220 may include seven solenoid valves 221 and one air pressure sensor 222. The airway openings of each solenoid valve 221 and air pressure sensor 222 can be directly connected via a central air path within the integrated valve 220. The air pressure sensor 222 can be used to collect air pressure values in the central air path. The cavity element 223, which can be referred to as a cavity compensation module, may be a cylindrical cavity. Here, the air pressure sensor 222 may be a detection device, and the cavity element may be a first element.

[0057] based on Figure 3 It can be seen that a cavity structure can be designed in the central air path, and the cavity structure can be a cavity element 223. The air pressure sensor 222 can be installed at the end of the branch air path of the cavity element 223, so that the air pressure value in the cavity element 223 can be directly collected.

[0058] From the above introduction, it can be seen that the electronic control unit 210 can be a system controller, which can be connected to the integrated valve 220 and the air pump 240 respectively through circuits. The electronic control unit 210 can be used to directly control the start and stop of the air pump 240, and can be used to control the switching status of each solenoid valve 221 in the integrated valve 220. It can also be used to directly obtain the air pressure value in the central air circuit collected by the air pressure sensor 222.

[0059] Optionally, the inflatable component 230 may include an external inflatable device 231 (external inflatable object) and a tire 232. For example, the external inflatable device 231 may be a balloon, an air mattress, an air sofa, or a tire of another vehicle. The tire 232 may include a left front wheel assembly, a left rear wheel assembly, a right front wheel assembly, and a right rear wheel assembly.

[0060] Optionally, the central inflation and deflation system 100 may further include an electromagnetic valve 6, which can be referred to as a quick-release valve. This electromagnetic valve 6 is used to close the tire's wheel-side valves after the inflated component 230 is completely inflated or deflated. Specifically, opening the quick-release valve closes the wheel-side valves. Thus, when the electromagnetic valve 6 is opened, the inflation or deflation process of the inflated component 230 ends. The electromagnetic valve 7 (slow-release valve) then deflates the inflated component 230, for example, to control tire deflation.

[0061] pass Figure 3 The central inflation and deflation system 100 of the disclosed embodiment can control the inflation and deflation of tires, as well as the inflation and deflation of external objects.

[0062] Specifically, when the central inflation and deflation system 100 controls the inflation of an external inflatable object, it controls the high-pressure gas to flow from the inflation pump 240 through the inflation pump interface of the integrated valve 220 and into the central air path of the integrated valve 220. During this process, a portion of the high-pressure gas can enter the cavity element 223 through the central air path, while the remaining portion of the high-pressure gas can enter the external inflatable device 231 through the solenoid valve 1 (external inflation valve) and the external inflatable object interface, thereby completing the inflation control of the external inflatable device 231.

[0063] Optionally, when the central inflation / deflation system 100 controls tire inflation, it can control high-pressure gas to flow from the inflation pump 240 through the inflation pump interface of the integrated valve 220 and into the central air path of the integrated valve 220. During this process, a portion of the high-pressure gas can enter the cavity element 223 through the central air path, while the remaining portion of the high-pressure gas can enter each wheel assembly as needed through the solenoid valves 2 to 5 and the FL, RL, FR, and RR interfaces, thereby completing tire inflation control. The solenoid valves 2 to 5 can be the control valve_FL, control valve_RL, control valve_FR, and control valve_RR, respectively.

[0064] Optionally, when the central inflation and deflation system 100 controls tire deflation, it can control the flow of high-pressure gas from the tire through the FL, RL, FR, and RR interfaces and solenoid valve 2 to solenoid valve 5 (control valve_FL, control valve_RL, control valve_FR, and control valve_RR), ultimately entering the central air circuit of the integrated valve 220. During this process, a portion of the high-pressure gas can enter the cavity element 223 through the central air circuit, while another portion can be discharged into the atmosphere through solenoid valve 7 (slow-release valve) and the slow-release interface, thereby completing tire deflation control. Here, solenoid valve 7 may also be referred to as a deflation valve or a deflation valve.

[0065] It should be noted that the ECU, air pump and integrated valve of the central inflation and deflation system can each be an assembly part separately, or they can be integrated into an assembly part in pairs, or the three can be integrated into an assembly part together, which can be installed on the chassis of the vehicle, or on the trunk of the vehicle, or on the front cabin of the vehicle.

[0066] From the above introduction, it is known that the air pressure sensor 222 can be used to collect the first pressure value of the filled component 230. The first pressure value can be obtained by the air pressure sensor 222 by collecting the air pressure in the cavity element 223. Different filled components 230 have different corresponding collected air pressures in the cavity element 223. For example, when the solenoid valve 5 is in a closed state and the solenoid valves 1 to 4 are in a disconnected state, the air pressure of the cavity element 223 collected by the air pressure sensor 222 can be used as the first pressure value of the right rear wheel. For another example, when the solenoid valve 1 is in a closed state and the solenoid valves 2 to 5 are in a disconnected state, the air pressure of the cavity element 223 collected by the air pressure sensor 222 can be used as the first pressure value of the external filled object of the right rear wheel.

[0067] It should be noted that, in the embodiment of the present disclosure, when the detection device 120 is collecting the air pressure value in the first element 110, the state of the inflation pump or the slow-release valve remains unchanged, that is, the switching state of the inflation pump or the slow-release valve will not be changed due to the detection device 120. This can improve the control efficiency of inflation and deflation to a certain extent.

[0068] In the disclosed embodiment, the air pressure compensation coefficient can be determined based on the first volume of the first element 110 connected to the detection device 120 and the second volume of the branch air path corresponding to the charged device 140. After collecting the first pressure value of the charged device 140, the disclosed embodiment can obtain the air pressure compensation coefficient corresponding to the charged device 140. Different charged devices 140 may also have different corresponding air pressure compensation coefficients. For example, if the detection device 120 collects the air pressure value of the left front wheel, the disclosed embodiment can obtain the air pressure compensation coefficient corresponding to the left front wheel.

[0069] Here, the air pressure compensation coefficient can be obtained after the vehicle is powered on for the first time, or it can be obtained at predetermined time intervals. For example, in the embodiment of the present disclosure, the compensation coefficient of the charged device 140 can be obtained once every one or three months. In addition, for the same charged device, the corresponding air pressure compensation coefficient is different when performing inflation control and deflation control.

[0070] Specifically, in the process of obtaining the air pressure compensation coefficient of the charged device 140, the embodiment of the present disclosure may first obtain a first volume and a second volume. The first volume may be the volume of the first element 110 connected to the detection device 120, which may be the sum of the volume of the first element 110 itself and the volume of the branch air path.

[0071] As an example, Figure 4 As shown, the first volume 201 may include the sum of the volume 2011 of the first element and the volume 2012 of the first branch gas path. Here, the first branch gas path may be the gas path between the first element and the central gas path.

[0072] Alternatively, the second volume 202 of the branch air path corresponding to the charged device 140 may be the volume of the air path between the charged device and its corresponding solenoid valve. For example, if the charged device is the right rear wheel, the corresponding second volume may be the volume of the branch air path between the right rear wheel assembly and the solenoid valve 5.

[0073] The methods for obtaining the pressure compensation coefficient are different when the inflated device is in the inflated state and the deflated state. As described above, the pressure compensation coefficient can include a first compensation coefficient and a second compensation coefficient. The first compensation coefficient is the compensation coefficient obtained when the inflated device 140 is in the inflated state, and the second compensation coefficient is the compensation coefficient obtained when the inflated device 140 is in the deflated state.

[0074] When controlling the inflation of an inflated component, that is, when the inflated device 140 is inflated, embodiments of the present disclosure can first obtain a second pressure value collected by a built-in sensor of the inflated device 140, that is, collect the internal air pressure value of the inflated device 140 through the built-in sensor of the inflated device 140. Based on this, a first compensation coefficient can be comprehensively determined based on the first pressure value, the second pressure value, the first volume, and the second volume. This first compensation coefficient can also be referred to as an inflation compensation coefficient.

[0075] Here, the built-in sensor of the device to be charged 140 may be a TPMS (Tire Pressure Monitoring System) sensor, which may be installed inside the device to be charged 140. For example, when the device to be charged 140 is a tire, the built-in sensor may be installed inside the tire, near the valve stem, so as to directly monitor the air pressure and temperature inside the tire.

[0076] Before obtaining the second pressure value, the embodiment of the present disclosure may determine whether a built-in sensor is installed in the charged device 140. If a built-in sensor is installed, the pressure value collected by the built-in sensor may be used as the second pressure value. Conversely, if the charged device 140 does not have a built-in sensor installed or the built-in sensor is faulty, the embodiment of the present disclosure may obtain another charged device 140 closest to the charged device 140 and use the pressure value collected by the built-in sensor of the other charged device 140 as the second pressure value.

[0077] Optionally, if no built-in sensor is installed in the charged device 140 or the built-in sensor fails, the embodiment of the present disclosure can also use the built-in sensors of other charged devices 140 to collect the second pressure value, and collect the first pressure value of other first elements 110 through the detection device 120. On this basis, the proportional relationship between the second pressure value and the first pressure value is obtained, and based on the proportional relationship, the air pressure compensation coefficient corresponding to the current charged device 140 is obtained.

[0078] Exemplarily, the first compensation coefficient can be calculated according to the following first formula: ; Among them, C1 is the first compensation coefficient, P1 is the first pressure value, P TPMS is the second pressure value, V1 is the first volume of the first element 110, V2 is the second volume of the branch gas path corresponding to the filled device 140; V2 / V1 can be a first proportional relationship between the second volume and the first volume, P TPMS / P1 may be a proportional relationship between the second pressure value and the first pressure value.

[0079] For example, the first volume may be the cavity volume V1, such as Figure 4 The first volume 201 shown can include the volume 2011 of the first element itself and the volume 2012 of the branch air path. Here, the volume 2012 of the branch air path can be the volume of the first element from the central air path. The second volume can be the branch air path V2 of the external inflatable object or tire. This second volume 202 can only include the volume of the branch air path and not the volume of the external inflatable object or tire. Alternatively, the second volume 202 can be the volume of the air path between any inflatable component and its corresponding solenoid valve.

[0080] For example, the second volume 202 may be the volume of the branch air path between the right rear wheel assembly and the solenoid valve 5. Alternatively, the second volume 202 may be the volume of the branch air path between the external charge and the solenoid valve 1. For example, the first proportional relationship between the second volume and the first volume may be: k1 = V2 / V1 = 100.

[0081] Optionally, when deflation control is being performed on the inflated device 140, i.e., when the inflated device 140 is in a deflated state, the disclosed embodiment can also obtain a second pressure value collected by a built-in sensor of the inflated device 140, i.e., collect the internal air pressure value of the inflated device 140 through the built-in sensor of the inflated device 140, as well as obtain the third volume of the inflated device 140 and the fourth volume of the deflation valve 150. On this basis, a second compensation coefficient can be comprehensively determined based on the first pressure value, the second pressure value, the first volume, the third volume, and the fourth volume. Here, the second compensation coefficient can also be referred to as the deflation compensation coefficient.

[0082] The third volume can be the sum of the volume of the filled device 140 itself and the volume of the corresponding branch gas path, such as Figure 5 As shown, third volume 203 may include the sum of volume 2031 of device 140 and volume 2032 of the second branch air path. Here, the second branch air path may be the volume of the air path between device 140 and its corresponding solenoid valve. For example, if device 140 is the left front wheel, the corresponding third volume may be the volume of the branch air path between the left front wheel assembly and solenoid valve 2.

[0083] Here, the third volume may be obtained based on the volume of the device to be filled 140 and the second volume. The third volume may be obtained by adding the volume of the device to be filled 140 and the volume of the second branch gas path.

[0084] The fourth volume can be the sum of the volume of the deflation valve 150 itself and the volume of the corresponding branch gas path, such as Figure 5 As shown, the fourth volume 204 may include the sum of the volume 204 of the deflation valve 150 and the volume 2042 of the third branch gas path. Here, the third branch gas path may be the volume of the gas path between the deflation valve 150 (slow release valve) and its corresponding deflation interface (slow release interface).

[0085] Exemplarily, the second compensation coefficient can be calculated according to the following second formula: ; Wherein, C2 is the second compensation coefficient, P1 is the first pressure value, P TPMS is the second pressure value, V1 is the first volume, V3 is the third volume of the filled device 140, and the third volume can be the sum of the volume of the filled device 140 itself and the second volume, V4 is the fourth volume of the deflation valve 150, and the fourth volume can be the sum of the volume of the deflation valve 150 itself and the volume of the third branch air path.

[0086] Obtaining the air pressure compensation coefficient can eliminate errors caused by gas flow when obtaining real-time pressure values. Due to component assembly errors between each vehicle, machining errors in the volume of the cavity within the central air path, and the complexity of gas flow during the inflation and deflation process of the central inflation and deflation system, the pressure value of the inflated device 140 is inaccurate. Obtaining the air pressure compensation coefficient can effectively address these issues. Specifically, the central inflation and deflation system 100 can perform a system self-test when it is first powered on, and during this system self-test, it can automatically start the operation of obtaining the air pressure compensation coefficient, thereby increasing the system's accuracy in converting the central air path cavity compensation.

[0087] It should be noted that after obtaining the first pressure value, the embodiment of the present disclosure can directly obtain the pre-acquired air pressure compensation coefficient, or can also calculate the air pressure compensation coefficient of the inflated device in real time. There is no clear restriction on when to calculate the air pressure compensation coefficient, and it can be selected according to actual conditions.

[0088] As an optional method, after obtaining the air pressure compensation coefficient, the embodiment of the present disclosure can correct the first pressure value based on the air pressure compensation coefficient to obtain the target pressure value, that is, the target pressure value can be obtained by correcting the first pressure value using the air pressure compensation coefficient.

[0089] From the above introduction, we know that the air pressure compensation coefficients corresponding to the inflated state and the deflated state are different. Therefore, the embodiment of the present disclosure can correct the first pressure value based on the first compensation coefficient to obtain the target pressure value of the inflated device in the inflated state, and can correct the first pressure value based on the second compensation coefficient to obtain the target pressure value of the inflated device in the deflated state.

[0090] Specifically, when controlling the inflation of the inflated device, the embodiment of the present disclosure can obtain a first proportional relationship between the second volume and the first volume, and correct the first pressure value according to the first proportional relationship and the first compensation coefficient to obtain the target pressure value of the inflated device in the inflated state.

[0091] For example, the target pressure value of the inflated device in the inflated state can be calculated according to the following third formula: ; Wherein, P2 is the target pressure value, k1 is the first proportional relationship, and the first proportional relationship can be the second volume V2 / the first volume V1, that is, .

[0092] Optionally, when deflation of the inflated device is controlled, embodiments of the present disclosure may obtain a second proportional relationship k2 between the third volume and the first volume, as well as a third proportional relationship k3 between the fourth volume and the first volume. Based on these, the first pressure value P1 is corrected according to the second proportional relationship k2, the third proportional relationship k3, and the second compensation coefficient C2 to obtain a target pressure value P3 for the inflated device in the deflated state.

[0093] Here, the target pressure value can be calculated according to the following fourth formula: ; Among them, P3 is the target pressure value, k2 is the second proportional relationship, k3 is the third proportional relationship, and P0 is the atmospheric pressure value.

[0094] It should be noted that in the process of correcting the first pressure value, not only the volume of the branch air path corresponding to the first element and the charged device, the volume of the charged device, and the volume of the deflation valve can be considered, but also the length of the branch air path of the first element, the length of the branch air path of the charged device, the length of the branch air path of the deflation valve, the diameter of the branch air path of the first element, the diameter of the branch air path of the charged device, and the diameter of the branch air path of the deflation valve, etc. can also be considered. By integrating these parameters, the final pressure value obtained can be more accurate.

[0095] In the embodiment of the present disclosure, the length of the first branch gas path may be the branch gas path length L1 of the cavity, which may be Figure 4 The length of the branch air path of the cavity element shown is the length of the branch air path from the central air path; the length of the second branch air path can be the length L2 of the branch air path of the external inflatable object or tire, which can be as Figure 4 The length of the branch air path between the right rear wheel assembly and the solenoid valve 5 is shown.

[0096] Exemplarily, a first length ratio relationship between the length of the second branch gas path and the length of the first branch gas path may be: k4=L2 / L1=2000.

[0097] Optionally, the length of the third branch gas path may be the length L of the branch gas path of the slow release valve. 慢放阀 , which can be Figure 5 The length of the branch gas path between the slow release valve and the slow release interface is shown. For example, the second length ratio between the length of the third branch gas path and the length of the first branch gas path can be: k5=L 慢放阀 / L1=10.

[0098] In the embodiment of the present disclosure, the diameter of the first branch gas path may be the diameter d1 of the branch gas path of the cavity, which may be Figure 4 The width of the branch air path from the central air path of the cavity element shown; the diameter of the second branch air path can be the diameter d2 of the branch air path of the external inflatable or tire, which can be as Figure 4 The width of the branch air path between the right rear wheel assembly and the solenoid valve 5 is shown.

[0099] Exemplarily, a first diameter ratio relationship between the diameter of the second branch gas path and the diameter of the first branch gas path may be: k6=d2 / d1=10.

[0100] Optionally, the diameter of the third branch gas path can be the width d of the branch gas path of the slow release valve. 慢放阀 , which can be Figure 5 The width of the branch gas path between the slow release valve and the slow release interface is shown. For example, the second diameter ratio between the diameter of the third branch gas path and the diameter of the first branch gas path can be: k7=d 慢放阀 / d1=5.

[0101] It should be noted that Figure 4 and Figure 5 202 and 2032 are primarily used to illustrate the volume, length, or diameter of the branch gas circuit. They are not actual connecting lines, but merely indicators. Alternatively, the second volume of the branch gas circuit may be the total volume of the gas circuit between the device being charged and the corresponding solenoid valve, which may include the interface volume.

[0102] During gas flow, pressure loss occurs in each branch gas path. This pressure loss increases the complexity of pressure conversion and can lead to significant errors between the conversion result and the actual pressure. Therefore, the disclosed embodiments introduce the volume of the cavity and the length and diameter of the branch gas paths within the central gas path. This information has a specific proportional relationship with the system gas path. Based on this specific proportional relationship, the pressure loss of each branch gas path can be compensated and eliminated. This allows the pressure loss of each branch to be ignored during the conversion process, simplifying the conversion process and improving the accuracy of the conversion result.

[0103] This embodiment sets the first element according to the above-mentioned volume ratio, length ratio and tube diameter ratio, which can improve the accuracy of pressure value acquisition to a certain extent and reduce the error in pressure acquisition of the tire or external object being measured. That is, based on the above-mentioned ratio, the specific pressure values of the external object and the tire can be accurately converted.

[0104] In summary, during the inflation and deflation process, the central inflation and deflation system does not need to shut down the inflation pump or slow-release valve, that is, it does not need to stabilize the gas in the central air path. It only needs to collect the air pressure value in the cavity in real time through the air pressure sensor and perform compensation conversion to obtain the real-time pressure value of the external inflated object or tire. In this process, there is no need to change the design of the original air pressure sensor acquisition circuit of the electronic control unit, nor is there any need to change the selection of the air pressure sensor. The air pressure sensor can be arranged in the integrated valve. In this way, without changing the original architecture of the system, the embodiment of the present disclosure can improve the control efficiency of the system's inflation and deflation by designing a cavity structure in the central air path of the integrated valve, while also improving the user experience.

[0105] The embodiment of the present disclosure can output an air pressure compensation coefficient by utilizing the first value of the first element connected to the detection device in the central inflation and deflation system. The controller can output a target pressure value based on the air pressure compensation coefficient. Since the switching state of the inflation pump or the deflation valve does not change due to the operation of the detection device during the process of obtaining the target pressure value, the efficiency of obtaining the target pressure value can be improved to a certain extent, and the accuracy of obtaining the target pressure value can be improved based on the air pressure compensation coefficient.

[0106] Figure 6This is a flow chart showing a method for obtaining pressure according to an exemplary embodiment. Figure 6 , the pressure acquisition method includes the following steps.

[0107] In step S310 , a first value of a first component is obtained.

[0108] The first value may include a first pressure value and a first volume of the first element.

[0109] In step S320, an air pressure compensation coefficient is output based on the first value, and a target pressure value of at least one charged device is output based on the air pressure compensation coefficient.

[0110] In some embodiments, the air pressure compensation coefficient may include a first compensation coefficient and a second compensation coefficient. The first compensation coefficient may be a compensation coefficient obtained when the inflated device is in an inflated state, and the second compensation coefficient may be a compensation coefficient obtained when the inflated device is in a deflated state.

[0111] The first compensation coefficient may be determined based on the first pressure value, the second pressure value, the first volume, and the second volume; and the second compensation coefficient may be determined based on the first pressure value, the second pressure value, the first volume, the third volume, and the fourth volume.

[0112] As an example, in order to better illustrate the process of obtaining the air pressure compensation coefficient, the embodiment of the present disclosure provides the following Figure 7 The example diagram shown is based on Figure 7 It can be seen that the central charging and discharging system can perform a system self-test when it is powered on for the first time, and can automatically start the operation of obtaining the compensation coefficient C (air pressure compensation coefficient) during the system self-test.

[0113] Specifically, the electronic control unit ECU (controller) can control the air pump and integrated valve, control the inflation of a tire in the central inflation and deflation system, and collect the pressure value P1 of the air pressure sensor and the tire pressure value P of the TPMS sensor in the tire in real time. TPMS On this basis, the electronic control unit can collect the air pressure value P1 in the cavity and the TPMS tire pressure value P TPMS As well as the volume V1 of the cavity and the volume V2 of the branch air path of the tire (excluding the tire volume), the first compensation coefficient C1 of the inflated device under inflation (compressor working) is obtained according to the above first formula.

[0114] Optionally, the electronic control unit ECU can also control the air pump and the integrated valve to control the deflation of the tire, that is, to collect the air pressure value P1 in the cavity and the tire pressure value P TPMS On this basis, the electronic control unit can collect the air pressure value P1 in the cavity and the TPMS tire pressure value PTPMS , the actual atmospheric pressure P0 and the volume V1 of the cavity, the total volume V3 (the third volume) of the branch air path of the tire, and the volume V4 (the fourth volume) of the branch air path of the slow release valve, and the second compensation coefficient of the inflated device under the deflated condition are obtained according to the above second formula.

[0115] In other embodiments, the target pressure value may include a target pressure value corresponding to the inflated state and a target pressure value corresponding to the deflated state. In the process of obtaining the target pressure value of the inflated device in the inflated state, the embodiment of the present disclosure can obtain a first proportional relationship between the second volume and the first volume, and correct the first pressure value according to the first proportional relationship and the first compensation coefficient to obtain the target pressure value of the inflated device in the inflated state.

[0116] For example, Figure 8 As shown, when controlling the inflation of an external object or tire, the electronic control unit (ECU) collects the real-time air pressure value P1 from the air pressure sensor within the central air path and performs cavity compensation conversion on the tire pressure value P2. During this process, the ECU first calculates the flow distribution relationship K between the high-pressure gas flow rate Q1 flowing into the cavity and the high-pressure gas flow rate Q2 flowing into the external object or tire based on the proportional relationship between the cavity volume V1 and the volume V2 of the branch air path connecting to the external object or tire: K = Q1 / Q2 = V2 / V1.

[0117] On this basis, the electronic control unit can calculate the pressure difference ΔP between the central air path cavity pressure value P1 and the external inflatable object or tire pressure value P2 based on the air pressure value P1 within the central air path, as measured by the air pressure sensor, the flow distribution relationship K, and the first inflation compensation coefficient C1. This pressure difference = (P1 × C1) / K. At this point, the external inflatable object or tire pressure value P2 can be calculated based on the pressure difference ΔP and the cavity air pressure value P1, i.e., P2 = P1 - ΔP. The formula for calculating the target pressure value P2 of the inflated device in the final inflated state can be as described in the third formula above.

[0118] Optionally, in the process of obtaining the target pressure value of the inflated device in the deflated state, the embodiment of the present disclosure can obtain a second proportional relationship between the third volume and the first volume, and obtain a third proportional relationship between the fourth volume and the first volume. On this basis, the first pressure value is corrected according to the second proportional relationship, the third proportional relationship and the second compensation coefficient to obtain the target pressure value of the inflated device in the deflated state.

[0119] For example, Figure 9 As shown, when controlling the deflation of an external object or a tire, such as controlling the deflation of a tire, the electronic control unit ECU can collect the air pressure value P1 of the air pressure sensor in the central air path in real time, and perform cavity compensation conversion on the tire pressure value P3.

[0120] Specifically, the electronic control unit can obtain a second proportional relationship k2=V3 / V1 between the volume V1 of the cavity and the total volume V3 of the tire (including the volume of the tire and the volume of the branch air path), and obtain a third proportional relationship k1 between the volume V1 of the cavity and the volume V4 of the branch air path of the slow release valve. 3= On this basis, according to the cavity pressure P1, the actual atmospheric pressure P0, the second compensation coefficient C2 and the above-mentioned volume ratio relationship k2 and k3, the target pressure value of the inflated device in the deflated state can be obtained based on the above-mentioned fourth formula.

[0121] Figure 10 is a block diagram of a pressure acquisition device according to an exemplary embodiment. Figure 10 The pressure acquisition device 400 may include an acquisition module 410 and an output module 420 .

[0122] The acquisition module 410 is configured to acquire a first value of a first component; The output module 420 is configured to output an air pressure compensation coefficient based on the first value, and output a target pressure value of at least one charged device based on the air pressure compensation coefficient.

[0123] Figure 11 FIG. 8 is a block diagram of a vehicle 800 according to an exemplary embodiment. The vehicle 800 may include the central inflation and deflation system. Figure 11 As shown, the vehicle 800 may further include: a processor 801 , a memory 802 , and one or more of a multimedia component 803 , an input / output (I / O) interface 804 , and a communication component 805 .

[0124] The processor 801 is used to control the overall operation of the vehicle 800 to complete all or part of the steps in the pressure acquisition method described above. The memory 802 is used to store various types of data to support the operation of the vehicle 800. This data may include, for example, instructions for any application or method operating on the vehicle 800, as well as application-related data such as contact information, sent and received messages, images, audio, video, etc. The memory 802 may be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 802 or transmitted via the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, which may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the vehicle 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more thereof, is not limited here. Therefore, the corresponding communication component 805 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0125] In an exemplary embodiment, the vehicle 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-mentioned pressure acquisition method.

[0126] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided. When executed by a processor, the program instructions implement the steps of the aforementioned pressure acquisition method. For example, the computer-readable storage medium may be the aforementioned memory 802 including the program instructions. The program instructions may be executed by the processor 801 of the vehicle 800 to perform the aforementioned pressure acquisition method.

[0127] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a programmable device, and has a code portion for executing the above pressure acquisition method when executed by the programmable device.

[0128] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0129] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0130] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A central inflation and deflation system, characterized in that: include: first element; at least one charged device, the charged device being connected to the first component; a detection device, configured to obtain a first value of the first element; A controller is configured to output an air pressure compensation coefficient based on the first value, and output at least one target pressure value of the charged device based on the air pressure compensation coefficient.

2. The system according to claim 1, wherein: The first value includes a first pressure value and a first volume of the first element, and the target pressure value is obtained by correcting the first pressure value using the air pressure compensation coefficient; The air pressure compensation coefficient includes a first compensation coefficient and a second compensation coefficient. The first compensation coefficient is a compensation coefficient obtained when the inflated device is in an inflated state, and the second compensation coefficient is a compensation coefficient obtained when the inflated device is in a deflated state.

3. The system according to claim 2, characterized in that The first compensation coefficient is determined according to the first pressure value, the second pressure value of the charged device, the first volume, and the second volume of the branch gas path corresponding to the charged device.

4. The system according to claim 3, characterized in that The first compensation coefficient is calculated according to the following formula: ； Wherein, C1 is the first compensation coefficient, P1 is the first pressure value, P TPMS is the second pressure value, V1 is the first volume, and V2 is the second volume.

5. The system according to claim 3, wherein: The controller is further configured to: obtaining a first proportional relationship between the second volume and the first volume; The first pressure value is corrected according to the first proportional relationship and the first compensation coefficient to obtain the target pressure value of the inflated device in the inflated state.

6. The system according to claim 5, characterized in that The target pressure value is calculated according to the following formula: ； Wherein, P2 is the target pressure value, and k1 is the first proportional relationship.

7. The system according to claim 2, wherein: The central inflation and deflation system further comprises an air deflation valve, which is connected to the inflated device and the first element respectively; The second compensation coefficient is determined according to the first pressure value, the second pressure value of the filled device, the first volume, the third volume of the filled device, and the fourth volume of the deflation valve.

8. The system according to claim 7, characterized in that The second compensation coefficient is calculated according to the following formula: ； Wherein, C2 is the second compensation coefficient, P1 is the first pressure value, P TPMS is the second pressure value, V1 is the first volume, V3 is the third volume, and V4 is the fourth volume.

9. The system according to claim 7, wherein: The controller is configured to: obtaining a second proportional relationship between the third volume and the first volume, and obtaining a third proportional relationship between the fourth volume and the first volume; The first pressure value is corrected according to the second proportional relationship, the third proportional relationship, and the second compensation coefficient to obtain a target pressure value of the inflated device in the deflated state.

10. The system according to claim 9, characterized in that The target pressure value is calculated according to the following formula: ； Wherein, P3 is the target pressure value, k2 is the second proportional relationship, k3 is the third proportional relationship, and P0 is the atmospheric pressure value.

11. The system according to any one of claims 1 to 10, characterized in that: The inflated device includes a tire and / or an external inflated device.

12. The system according to any one of claims 1 to 10, characterized in that: The first end of the first element is connected to each of the charged devices, and the second end of the first element is connected to the detection device.

13. A vehicle, characterized in that: The vehicle comprises the central inflation and deflation system according to any one of claims 1-12.

14. A pressure acquisition method, characterized in that: The method comprises: Obtaining a first value of a first component; An air pressure compensation coefficient is output based on the first value, and a target pressure value of at least one charged device is output based on the air pressure compensation coefficient.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 14 are implemented.

16. A computer program product, characterized in that The invention comprises a computer program which, when executed by a processor, implements the steps of the method according to claim 14.

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