Vehicle attitude adjustment control system and control method

Abstract

The invention relates to a whole vehicle attitude adjustment control system and method, the system comprises a whole vehicle controller, a lifting driving assembly, four air suspensions and four capacitive sensors, the four air suspensions are distributed in a pairwise opposite mode, and the four air suspensions are used for being connected with four tires through suspension structures respectively; the lifting driving assembly communicates with the four air suspensions through inflation pipelines and is used for driving the four air suspensions to ascend and descend. The four capacitive sensors are respectively arranged beside the four air suspensions and are respectively used for detecting the lifting change quantity of the four air suspensions, namely the wheel eyebrow change quantity; the lifting driving assembly and the four capacitive sensors are in communication connection with the vehicle control unit. The method has the beneficial effects that the method is simple, the design is reasonable, the posture of the whole vehicle can be adaptively adjusted according to the actual load of the vehicle, the posture balance and attractiveness of the whole vehicle are guaranteed, and the cost is low.

Description

Technical Field

[0001] This invention relates to the field of automotive posture adjustment technology, specifically to a vehicle posture adjustment control system and control method. Background Technology

[0002] Traditional vehicles cannot adaptively adjust their posture when on display (stationary): The height of traditional air springs is mostly adjustable in three intervals. If the vehicle is unbalanced, one or more air springs will be over-compressed, while the other air springs will be in a normal or relaxed state, resulting in an unbalanced and unsightly vehicle posture.

[0003] Traditional control logic cannot couple the individual air springs: traditional air spring control logic treats the four air springs as independent, unrelated actuators. However, the vehicle body is a holistic structure, and any change in the height and stiffness of any suspension will affect the forces and displacements of other suspensions through the vehicle body.

[0004] Traditional air spring control logic is rigid: Traditional air spring control logic only allows three or more non-continuous adjustable settings for air springs.

[0005] Traditional air spring height sensors are expensive. They often use linkage potentiometers, Hall effect sensors, or optical sensors, which have a series of disadvantages such as space occupation, susceptibility to electromagnetic interference, or high cost. Summary of the Invention

[0006] This invention addresses the technical problems existing in the prior art by providing a vehicle attitude adjustment control system and control method.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A vehicle attitude adjustment control system includes: a vehicle controller, a lifting drive assembly, four air suspensions, and four capacitive sensors. The four air suspensions are distributed in pairs opposite to each other and are respectively connected to the four tires through a suspension structure. The lifting drive assembly is connected to the four air suspensions through inflation lines and is used to drive the four air suspensions to lift and lower. The four capacitive sensors are respectively installed next to the four air suspensions and are used to detect the lifting and lowering changes of the four air suspensions, i.e., the wheel arch changes. The lifting drive assembly and the four capacitive sensors are respectively communicatively connected to the vehicle controller. The four capacitive sensors send the detected wheel arch changes to the vehicle controller. The vehicle controller receives the corresponding signals and compares them with the preset wheel arch height. When at least one wheel arch change is not equal to its preset wheel arch height, the vehicle controller controls the lifting drive assembly to drive the corresponding air suspension to lift or lower, thereby adjusting the vehicle's attitude.

[0008] The beneficial effects of the present invention are as follows: During operation, four capacitive sensors are used to detect the lifting amount of the four air suspensions, i.e. the wheel arch change amount. The four capacitive sensors send the detected wheel arch change amount to the vehicle controller. The vehicle controller receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment. When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller controls the lifting drive assembly to drive the corresponding air suspension to lift or lower, so as to adjust the vehicle's attitude.

[0009] The method of this invention is simple and reasonably designed. It can adjust the posture of the vehicle according to the actual load of the vehicle, so as to ensure the posture balance and aesthetics of the vehicle, and the cost is low.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the lifting drive assembly includes an inflation component and four on / off valves, the four on / off valves being fixedly installed on the four inflation lines respectively; one end of each of the four inflation lines is connected to one of the four air suspensions, and the inflation component is connected to the other end of each of the four inflation lines respectively; the inflation component and the four on / off valves are respectively communicatively connected to the vehicle controller.

[0012] The beneficial effect of adopting the above-mentioned further solution is that during operation, the vehicle controller controls the opening and closing of the above four opening and closing valves so that the inflation component can inflate any one or more air suspensions to realize the raising and lowering of any one or more air suspensions. This results in a high degree of automation and convenient adjustment.

[0013] Furthermore, the four opening and closing valves are all solenoid valves.

[0014] The advantages of adopting the above-mentioned further scheme are that the structure is simple, the four opening and closing valves are preferably solenoid valves, which is more reasonable, easy to control, highly automated, and easy to adjust.

[0015] Furthermore, the inflation component includes a cylinder and an inflation pump. The cylinder is connected to the other end of each of the four inflation lines, and the inflation pump is connected to the cylinder. The cylinder and the inflation pump are respectively connected to the vehicle controller.

[0016] The beneficial effect of adopting the above-mentioned further solution is that during operation, an air pump is used in conjunction with a cylinder to inflate any one or more air suspensions, thereby realizing the raising and lowering of any one or more air suspensions. This results in a high degree of automation and convenient adjustment.

[0017] Furthermore, it also includes four pressure sensors, which are respectively installed on the four air suspensions and are respectively connected to the vehicle controller, and are respectively used to detect the pressure in the four air suspensions.

[0018] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. During operation, four pressure sensors are used to detect the pressure inside the four air suspensions respectively. When the pressure inside the four air suspensions reaches the maximum value, the inflation of the four air suspensions can be stopped.

[0019] The present invention also relates to a control method implemented using the vehicle attitude adjustment control system described above, comprising the following specific steps: S1: Detects the load applied to the vehicle, and simultaneously uses four capacitive sensors to detect the lifting and lowering of the four air suspensions, i.e., the change in wheel arches, and sends the corresponding signals to the vehicle controller. S2: The vehicle controller receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment; When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller controls the lifting drive assembly to drive the corresponding air suspension to lift or lower, so as to adjust the vehicle's attitude.

[0020] The beneficial effect of adopting the above-mentioned further solution is that during operation, S1: detects the load applied to the vehicle, and at the same time uses four capacitive sensors to detect the lifting amount of the four air suspensions, i.e. the change in wheel arches, and sends the corresponding signals to the vehicle controller. S2: The vehicle controller receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment; When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller controls the lifting drive assembly to drive the corresponding air suspension to lift or lower, so as to adjust the vehicle's attitude.

[0021] Furthermore, when the change in one of the wheel arches is not equal to its preset wheel arch height, the vehicle controller controls the lifting drive assembly to drive the air suspension diagonally opposite to the change in wheel arch to lift primarily, while simultaneously controlling the lifting drive assembly to fine-tune the lifting of the remaining two air suspensions as a secondary adjustment, in order to adjust the overall vehicle attitude.

[0022] The beneficial effect of adopting the above-mentioned further solution is that during operation, when the change in one of the wheel arches is not equal to its preset wheel arch height, the vehicle controller controls the lifting drive assembly to drive the air suspension diagonally opposite to the change in wheel arch to lift as the primary action, while simultaneously controlling the lifting drive assembly to fine-tune the lifting of the remaining two air suspensions as the secondary action, so as to adjust the overall vehicle attitude.

[0023] Furthermore, when the changes in the two coaxially distributed wheel arches are not equal to their preset wheel arch heights, the vehicle controller controls the lifting drive assembly to drive the two air suspensions corresponding to the opposite side axle to descend, so as to adjust the vehicle's attitude.

[0024] The beneficial effect of adopting the above-mentioned further solution is that during operation, when the change amount of the two coaxially distributed wheel arches is not equal to their preset wheel arch heights, the vehicle controller controls the lifting drive assembly to drive the two air suspensions corresponding to the opposite side axle to descend, so as to adjust the vehicle attitude.

[0025] Furthermore, when the changes in the two wheel arches distributed on one of the diagonals are not equal to their preset wheel arch heights, the vehicle controller controls the lifting drive assembly to drive the two air suspensions on the other diagonal to adjust the vehicle's attitude.

[0026] The beneficial effect of adopting the above-mentioned further solution is that during operation, when the change in the two wheel arches distributed on one of the diagonals is not equal to their preset wheel arch heights, the vehicle controller controls the lifting drive assembly to drive the two air suspensions on the other diagonal to adjust the vehicle's attitude.

[0027] Furthermore, when the changes in the three wheel arches are not equal to their preset wheel arch heights, the vehicle controller controls the lifting drive assembly to lift any one of the three air suspensions to adjust the vehicle's attitude.

[0028] The beneficial effect of adopting the above-mentioned further solution is that when the change amount of the three wheel arches is not equal to their preset wheel arch height, the vehicle controller controls the lifting drive assembly to drive any one of the three air suspensions to lift or lower, so as to adjust the vehicle attitude. Attached Figure Description

[0029] Figure 1 This is a flowchart of the control method in this invention; Figure 2 This is a schematic diagram of the structure of the present invention.

[0030] The attached diagram lists the components represented by each number as follows: 1. Vehicle controller; 2. Air suspension; 3. Capacitive sensor; 4. Inflation line; 5. Solenoid valve; 6. Cylinder; 7. Inflation pump; 8. Pressure sensor. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0034] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0035] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0036] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a vehicle attitude adjustment control system, including: a vehicle controller 1, a lifting drive assembly, four air suspensions 2, and four capacitive sensors 3. The four air suspensions 2 are distributed in pairs opposite to each other and are respectively used to connect to the four tires through the suspension structure. The lifting drive assembly is connected to the four air suspensions 2 through inflation lines 4 and is used to drive the four air suspensions 2 to lift and lower. The four capacitive sensors 3 are respectively installed next to the four air suspensions 2 and are respectively used to detect the lifting and lowering changes of the four air suspensions 2, i.e., the wheel arch changes. The lifting drive assembly and the four capacitive sensors 3 are respectively communicatively connected to the vehicle controller 1. The four capacitive sensors 3 send the detected wheel arch changes to the vehicle controller 1 respectively. The vehicle controller 1 receives the corresponding signals and compares them with the preset wheel arch height. When at least one wheel arch change is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the corresponding air suspension 2 to lift or lower, so as to adjust the vehicle's attitude.

[0037] During operation, four capacitive sensors 3 are used to detect the lifting amount of the four air suspensions 2, i.e. the wheel arch change amount. The four capacitive sensors 3 send the detected wheel arch change amount to the vehicle controller 1 respectively. The vehicle controller 1 receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment. When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the corresponding air suspension to lift or lower, so as to adjust the vehicle's attitude.

[0038] The method described in this embodiment is simple and reasonably designed. It can adjust the vehicle's posture according to the actual load of the vehicle, ensuring the vehicle's posture balance and aesthetics, and is low in cost.

[0039] Example 2 Based on Embodiment 1, in this embodiment, the lifting drive assembly includes an inflation component and four on / off valves, the four on / off valves being fixedly installed on the four inflation lines 4 respectively; one end of each of the four inflation lines 4 is connected to one of the four air suspensions 2 respectively, and the inflation component is connected to the other end of each of the four inflation lines 4 respectively; the inflation component and the four on / off valves are respectively connected to the vehicle controller 1 for communication.

[0040] During operation, the vehicle controller 1 controls the opening and closing of the four opening and closing valves to inflate any one or more air suspensions 2, thereby raising or lowering any one or more air suspensions 2. The system is highly automated and easy to adjust.

[0041] Example 3 Based on Example 2, in this example, the four opening and closing valves are solenoid valves 5.

[0042] The scheme has a simple structure, and it is more reasonable to select solenoid valve 5 for the four opening and closing valves, which is easy to control, has a high degree of automation, and is easy to adjust.

[0043] During operation, the vehicle controller 1 controls the opening and closing of the four solenoid valves 5 so that the inflation component can inflate any one or more air suspensions 2, thereby raising or lowering any one or more air suspensions 2. The system is highly automated and easy to adjust.

[0044] Alternatively, the four opening and closing valves mentioned above can also be manual valves, but manual valves are not as convenient as the solenoid valve 5 mentioned above.

[0045] Example 4 Based on any one of Embodiments 2 to 3, in this embodiment, the inflation component includes a cylinder 6 and an inflation pump 7. The cylinder 6 is connected to the other end of each of the four inflation lines 4, and the inflation pump 7 is connected to the cylinder 6. The cylinder 6 and the inflation pump 7 are respectively connected to the vehicle controller 1.

[0046] During operation, the air pump 7 and the cylinder 6 are used to inflate any one or more air suspensions 2, thereby raising or lowering any one or more air suspensions 2. The system is highly automated and easy to adjust.

[0047] Example 5 Based on the above embodiments, this embodiment also includes four pressure sensors 8, which are respectively installed on the four air suspensions 2, and are respectively connected to the vehicle controller 1, and are respectively used to detect the pressure in the four air suspensions 2.

[0048] The scheme has a simple structure and reasonable design. During operation, four pressure sensors 8 are used to detect the pressure inside the four air suspensions 2 respectively. When the pressure inside the four air suspensions 2 reaches the maximum value, the inflation of the four air suspensions 2 can be stopped.

[0049] During operation, four capacitive sensors 3 are used to detect the lifting amount of the four air suspensions 2, i.e. the wheel arch change amount. The four capacitive sensors 3 send the detected wheel arch change amount to the vehicle controller 1 respectively. The vehicle controller 1 receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment. When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the corresponding air suspension to lift or lower, so as to adjust the vehicle's attitude.

[0050] During this process, four pressure sensors 8 are used to detect the pressure in the four air suspensions 2 respectively, and the corresponding signals are sent to the vehicle controller 1. The vehicle controller 1 determines whether the pressure in the air suspension 2 has reached the maximum value.

[0051] Example 6 Based on the above embodiments, this embodiment also relates to a control method implemented using the vehicle attitude adjustment control system described above, including the following specific steps: S1: Detect the load applied to the vehicle, and at the same time use four capacitive sensors 3 to detect the lifting amount of the four air suspensions 2, i.e. the change in wheel arches, and send the corresponding signals to the vehicle controller 1. S2: The vehicle controller 1 receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment; When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the corresponding air suspension 2 to lift or lower, so as to adjust the vehicle's posture.

[0052] During operation, S1 detects the load applied to the vehicle and simultaneously uses four capacitive sensors 3 to detect the lifting amount of the four air suspensions 2, i.e. the change in wheel arches, and sends the corresponding signals to the vehicle controller 1. S2: The vehicle controller 1 receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment; When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the corresponding air suspension 2 to lift or lower, so as to adjust the vehicle's posture.

[0053] Example 7 Based on Embodiment 6, in this embodiment, when the change in one of the wheel arches is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the air suspension 2 diagonally opposite to the change in wheel arch to lift as the primary action, while simultaneously controlling the lifting drive assembly to fine-tune the lifting of the remaining two air suspensions 2 as the secondary action, so as to adjust the overall vehicle posture.

[0054] During operation, when the change in one of the wheel arches is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the air suspension 2 diagonally opposite to the change in wheel arch to lift as the primary action, while simultaneously controlling the lifting drive assembly to fine-tune the lifting of the remaining two air suspensions 2 as the secondary action, in order to adjust the overall vehicle posture.

[0055] Based on the above scheme, the range of fine adjustment for the remaining two air suspensions 2 is ±3mm.

[0056] Example 8 Based on Embodiment 6, in this embodiment, when the change in the two coaxially distributed wheel arches is not equal to their preset wheel arch heights, the vehicle controller 1 controls the lifting drive assembly to drive the two air suspensions 2 corresponding to the opposite side axle to descend, so as to adjust the vehicle's attitude.

[0057] During operation, when the change in the two coaxially distributed wheel arches is not equal to their preset wheel arch heights, the vehicle controller 1 controls the lifting drive assembly to drive the two air suspensions 2 corresponding to the opposite side axle to descend, so as to adjust the vehicle's posture.

[0058] Example 9 Based on Embodiment 6, in this embodiment, when the change in the two wheel arches distributed on one diagonal is not equal to their preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the two air suspensions 2 on the other diagonal to adjust the vehicle's posture.

[0059] During operation, when the change in the two wheel arches on one of the diagonal distributions is not equal to their preset wheel arch heights, the vehicle controller 1 controls the lifting drive assembly to drive the two air suspensions 2 on the other diagonal to adjust the vehicle's posture.

[0060] Example 10 Based on Embodiment 6, in this embodiment, when the change in the three wheel arches is not equal to their preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive any one of the three air suspensions 2 to lift or lower, so as to adjust the vehicle's posture.

[0061] During operation, when the changes in the three wheel arches are not equal to their preset wheel arch heights, the vehicle controller 1 controls the lifting drive assembly to lift any one of the three air suspensions 2 to adjust the vehicle's attitude.

[0062] The above embodiments 7, 8, 9 and 10 represent several different posture adjustment scenarios.

[0063] This invention provides a vehicle attitude adjustment control system and control method, the different situations and adjustment principles of which are as follows: (1) When the change in one of the wheel arches is not equal to its preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the air suspension 2 diagonally opposite to the change in wheel arch to lift as the main movement, and at the same time controls the lifting drive assembly to finely adjust the lifting of the remaining two air suspensions 2 as the auxiliary movement, so as to adjust the attitude of the whole vehicle.

[0064] (2) When the change in the two wheel arches distributed on the same axis is not equal to their preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive the two air suspensions 2 corresponding to the opposite side axle to descend, so as to adjust the vehicle posture.

[0065] (3) When the change in the two wheel arches distributed on one of the diagonals is not equal to their preset wheel arch heights, the vehicle controller 1 controls the lifting drive assembly to drive the two air suspensions 2 on the other diagonal to adjust the vehicle posture.

[0066] (4) When the change in the three wheel arches is not equal to their preset wheel arch height, the vehicle controller 1 controls the lifting drive assembly to drive any one of the three air suspensions 2 to lift or lower, so as to adjust the vehicle posture.

[0067] Based on the above scheme, the vehicle attitude angle (X, Y and Z directions) can be set in the vehicle controller system during the initial adjustment phase, which can further determine the attitude of the vehicle.

[0068] In addition, Figure 2 The dashed lines in the diagram represent control circuits.

[0069] This invention provides a vehicle attitude adjustment control system and control method, the beneficial effects of which are as follows: 1. Low sensor cost: Only four capacitive sensors are installed on the wheel arches to complete the continuous, accurate and fast measurement of suspension height, and they take up almost no space in the vehicle.

[0070] 2. High-precision sensing: The use of capacitive sensors to directly measure the gap between the wheel arch and the tire eliminates the conversion error of traditional indirect measurement, and can more accurately reflect changes in vehicle height and attitude.

[0071] 3. Maintain the best vehicle posture: With the "vehicle posture angle" as the ultimate optimization goal, ensure that the vehicle can obtain the best static display posture within the possible range under various loads.

[0072] 4. Comprehensive safety protection: Using air spring pressure as the core control constraint, the system actively prevents any spring overpressure through multi-mode switching, effectively protecting the suspension system and avoiding component damage.

[0073] 5. High system versatility: The installation of capacitive sensors is not dependent on the suspension structure, and the control algorithm is based on vehicle attitude and pressure constraints. Therefore, this technology can be applied to various vehicle models and suspension types, exhibiting excellent versatility.

[0074] This invention provides a vehicle attitude adjustment control system and control method, the key points of which are: 1. Non-contact measurement of wheel arch and tire clearance using capacitive sensors: The suspension height is indirectly measured by measuring the clearance between the wheel arch and the tire using capacitive sensors. This method features non-contact, wear-free, high precision, and fast response.

[0075] 2. Multi-mode intelligent adjustment algorithm based on capacitive sensor signals: An algorithm that automatically selects three adjustment modes (normal adjustment, pressure limiting protection, and extreme pressure) based on the current air spring pressure and the estimated target pressure. This algorithm ensures that the vehicle's posture reaches its optimal level while maintaining safe air spring pressure.

[0076] 3. Introduction and optimization of vehicle attitude angle: The vehicle attitude angle (the angle between the straight line of the lower side skirt of the body-in-white and the horizontal plane) is used as the control target. By adjusting it, the vehicle attitude angle is optimized, thereby improving the visual display effect and stability of the vehicle.

[0077] 4. Coordinated inflation and deflation strategy: The air springs in the four air suspensions are coupled and adjusted to achieve coordinated adjustment of the vehicle's posture, while avoiding the risk of over-inflation of a single spring, making the adjustment process smoother and more efficient.

[0078] 5. Standardized sensor installation location: The sensor installation point has been moved from the complex, variable, and space-constrained chassis area to the relatively regular and uniform wheel arch, enabling the same set of sensor hardware to be applied to different vehicle platforms.

[0079] The working logic of traditional air suspension automatic leveling systems is relatively simple and direct: "Detect height → Compare with target → Adjust to target". Its core objective is to restore the vehicle body to a level posture, without considering the stress conditions of each air spring. The drawback of this method is: (1) Neglecting mechanical safety: When the vehicle is severely unbalanced on one side, forcibly leveling it may cause the air spring pressure on one side to exceed the safety limit.

[0080] (2) Rigid adjustment strategy: Regardless of the load distribution, the horizontal attitude is the only objective, which lacks flexibility.

[0081] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of the invention is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A vehicle attitude adjustment control system, characterized in that, include: The vehicle controller (1), lifting drive assembly, four air suspensions (2) and four capacitive sensors (3) are provided. The four air suspensions (2) are distributed in pairs and are respectively used to connect to the four tires through the suspension structure. The lifting drive assembly is connected to the four air suspensions (2) through the inflation pipes (4) and is used to drive the four air suspensions (2) to lift. The four capacitive sensors (3) are respectively installed next to the four air suspensions (2) and are respectively used to detect the lifting change of the four air suspensions (2), that is, the wheel arch change. The lifting drive assembly and the four capacitive sensors (3) are respectively connected to the vehicle controller (1) for communication. The four capacitive sensors (3) send the detected wheel arch changes to the vehicle controller (1) respectively. The vehicle controller (1) receives the corresponding signals and compares them with the preset wheel arch height. When at least one wheel arch change is not equal to its preset wheel arch height, the vehicle controller (1) controls the lifting drive assembly to drive the corresponding air suspension (2) to lift and lower to adjust the vehicle posture.

2. The vehicle attitude adjustment control system according to claim 1, characterized in that, The lifting drive assembly includes an inflation component and four opening and closing valves. The four opening and closing valves are respectively fixedly installed on the four inflation lines (4). One end of the four inflation lines (4) is connected to the four air suspensions (2), and the inflation component is connected to the other end of the four inflation lines (4). The inflation component and the four opening and closing valves are respectively connected to the vehicle controller (1).

3. The vehicle attitude adjustment control system according to claim 2, characterized in that, The four opening and closing valves are solenoid valves (5).

4. The vehicle attitude adjustment control system according to claim 2, characterized in that, The inflation component includes a cylinder (6) and an inflation pump (7). The cylinder (6) is connected to the other end of the four inflation lines (4) respectively, and the inflation pump (7) is connected to the cylinder (6). The cylinder (6) and the inflation pump (7) are respectively connected to the vehicle controller (1).

5. The vehicle attitude adjustment control system according to any one of claims 1-4, characterized in that, It also includes four pressure sensors (8), which are respectively installed on the four air suspensions (2), and are respectively connected to the vehicle controller (1) for detecting the pressure in the four air suspensions (2).

6. A control method implemented using the vehicle attitude adjustment control system as described in any one of claims 1-5, characterized in that, The specific steps include the following: S1: Detect the load applied to the vehicle, and at the same time use four capacitive sensors (3) to detect the lifting amount of the four air suspensions (2), i.e. the change in wheel arches, and send the corresponding signals to the vehicle controller (1). S2: The vehicle controller (1) receives the corresponding signal and compares the signal with the preset wheel arch height to make a judgment; When at least one of the wheel arch changes is not equal to its preset wheel arch height, the vehicle controller (1) controls the lifting drive assembly to drive the corresponding air suspension (2) to lift and lower, so as to adjust the vehicle posture.

7. The control method according to claim 6, characterized in that, When the change in one of the wheel arches is not equal to its preset wheel arch height, the vehicle controller (1) controls the lifting drive assembly to drive the air suspension (2) diagonally opposite to the change in wheel arch to lift as the main movement, and at the same time controls the lifting drive assembly to fine-tune the lifting of the remaining two air suspensions (2) as the auxiliary movement, so as to adjust the overall vehicle posture.

8. The control method according to claim 6, characterized in that, When the change in the two coaxially distributed wheel arches is not equal to their preset wheel arch height, the vehicle controller (1) controls the lifting drive assembly to drive the two air suspensions (2) corresponding to the opposite side axle to descend, so as to adjust the vehicle posture.

9. The control method according to claim 6, characterized in that, When the change in the two wheel arches distributed on one of the diagonals is not equal to their preset wheel arch heights, the vehicle controller (1) controls the lifting drive assembly to drive the two air suspensions (2) on the other diagonal to adjust the vehicle's posture.

10. The control method according to claim 6, characterized in that, When the change in the three wheel arches is not equal to their preset wheel arch height, the vehicle controller (1) controls the lifting drive assembly to lift any one of the three air suspensions (2) to adjust the vehicle's posture.

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