Automobile air spring control method and system

Abstract

The invention discloses an automobile air spring control method and system. The method comprises the steps that automobile body state information of a target automobile is obtained; judging whether the vehicle is in an adjustable state or not based on the vehicle body state signal, and if yes, sending an air spring adjusting request; determining an air spring adjusting action according to an air spring adjusting request sent by the target vehicle; the vehicle height is adjusted based on the air spring adjustment action request. According to the method, the vehicle body state information is accurately calculated, the vehicle working condition judgment and the response process of the adjustment request are optimized, so that the air spring system is accurately adjusted under different driving modes and road conditions, and the vehicle running stability and riding comfort are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and more particularly to an automobile air spring control method and system. BACKGROUND

[0002] With the development of the automobile industry, people's requirements for the comfort and control stability of automobiles are increasing. Although the air spring system has the advantages of adjustable stiffness and height, the existing control method has defects.

[0003] Some methods are not accurate in reading and calculating vehicle body state information, and the adjustment is not timely and appropriate. Some methods are not perfect in judging the working condition and responding to the adjustment request process, and do not fully consider the state of key components, which affects the performance and normal driving of the vehicle. For example, the existing technology only judges according to the road surface and wheel state, and the information dimension obtained is single, which cannot accurately reflect the real-time state of the whole vehicle. The road surface condition is complex and changeable, and the wheel state can reflect part of the information, but key information such as the door state and the lifting speed of the vehicle is difficult to accurately obtain through this method. This makes the judgment result one-sided, which may misjudge as adjustable when the vehicle is actually in an inappropriate adjustment state, or make an incorrect judgment in a condition that can be adjusted, and cannot meet the demand for accurate adjustment of the air spring system of the vehicle under complex working conditions.

[0004] Therefore, how to provide an automobile air spring control method and system has become a technical problem to be solved in the field. SUMMARY

[0005] The purpose of the present application is to provide a new technical solution for an automobile air spring control method and system.

[0006] According to a first aspect of the present application, an automobile air spring control method is provided, comprising:

[0007] obtaining vehicle body state information of a target vehicle;

[0008] judging whether the vehicle is in an adjustable state based on the vehicle body state signal, and if so, issuing an air spring adjustment request;

[0009] determining an air spring adjustment action according to the air spring adjustment request issued by the target vehicle;

[0010] adjusting the height of the vehicle based on the air spring adjustment action request.

[0011] Optionally, the obtaining of the vehicle body state information of the target vehicle comprises:

[0012] obtaining the acceleration value of the target vehicle in the acceleration state or the deceleration state, and the ground clearance of the vehicle body;

[0013] Based on the acceleration value of the vehicle in acceleration or deceleration state, the body rotation angular velocity is calculated, and the body state information signal is sent out;

[0014] The sent body state information signal is processed and unit converted;

[0015] The processed signal is calculated and filtered to obtain accurate and true signal.

[0016] Optionally, the method further comprises:

[0017] Obtaining the door state information of each door of the target vehicle;

[0018] Based on the door state information, it is judged whether each door is in a closed state, and if so, an air spring adjustment request is sent out.

[0019] Optionally, if the door is in a closed state, the method further comprises the following steps:

[0020] Obtaining the height change rate of the height sensor;

[0021] Based on the height change rate, it is judged whether the height change rate is less than a preset rate, and if so, an air spring adjustment request is sent out.

[0022] Optionally, if the height change rate is less than the preset rate, the method further comprises the following steps:

[0023] Obtaining the state information of the air spring system of the target vehicle;

[0024] Based on the state information of the air spring system, it is judged whether the air spring system of the target vehicle is currently in an active state, and if so, an air spring adjustment request is sent out.

[0025] Optionally, the method further comprises:

[0026] According to the adjustment gear corresponding to the target height of the air spring adjustment sent out by the target vehicle;

[0027] According to the body state information, it is judged whether the target height can be reached;

[0028] Calculating the difference between the target height and the current actual height;

[0029] Balancing the front and rear axles of the vehicle;

[0030] Determining the air spring adjustment action.

[0031] Optionally, the method further comprises:

[0032] Obtaining the current pressure value of the gas tank;

[0033] selecting a pressure source based on the current pressure value of the gas tank;

[0034] determining whether the gas tank and the compressor are in an activated state, and if so, performing a height adjustment action.

[0035] According to a second aspect of the present application, there is provided an automobile air spring control system, comprising a reading module, a calculation module, a determination module, a request module, and an execution module.

[0036] The reading module is configured to read sensor signals.

[0037] The calculation module is connected to the reading module and is configured to filter, correct, and solve signals.

[0038] The determination module is connected to the calculation module and is configured to determine whether the vehicle is currently in an adjustable state under normal working conditions.

[0039] The request module is connected to the determination module and is configured to determine an air spring adjustment action and issue an air spring adjustment action request.

[0040] The execution request is connected to the request module and is configured to perform a vehicle height adjustment action.

[0041] The present application has the following advantages:

[0042] 1. Improve data reliability: By collecting multi-dimensional vehicle body state information and performing a series of processes such as removing interference, correcting deviation, unifying units, and deep calculation on the original signal, accurate and real signals reflecting the actual state of the vehicle can be obtained. This makes the subsequent judgment and control based on the vehicle body state information more reliable, avoiding incorrect decisions caused by inaccurate signals.

[0043] 2. Optimize system operation efficiency: Accurate determination of whether the vehicle is in an adjustable state avoids invalid adjustment attempts by the system at inappropriate times. Only in appropriate conditions can subsequent adjustment actions be performed, reducing unnecessary calculations and operations of the system, improving the operation efficiency of the air spring system, and prolonging the service life of the components.

[0044] 3. Achieve precise adjustment: According to the air spring adjustment request issued by the target vehicle, the air spring adjustment action can be determined to accurately adjust the actual needs of the vehicle. For example, when the vehicle encounters different load conditions or changes in driving conditions, the system can accurately make corresponding adjustment actions according to the request, so that the working state of the air spring matches the actual needs of the vehicle, improving the overall performance of the vehicle.

[0045] 4. Enhance the passability and applicability of the vehicle: reasonable height adjustment of the vehicle can adjust the ground clearance of the vehicle according to different road conditions and driving needs. For example, appropriately raising the body height when passing through rough road to improve the passability of the vehicle; reducing the body height when driving at high speed to reduce wind resistance and improve fuel economy. This makes the vehicle adapt to more different use scenarios and enhances the applicability of the vehicle.

[0046] Other features of the present application, and their advantages, will become apparent from the following detailed description of illustrative embodiments of the present application, together with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0048] Figure 1 Flow chart of the automobile air spring control method of the present application;

[0049] Figure 2 Flow chart of the first embodiment of the automobile air spring control method of the present application;

[0050] Figure 3 Flow chart of the second embodiment of the automobile air spring control method of the present application;

[0051] Figure 4 Flow chart of the third embodiment of the automobile air spring control method of the present application;

[0052] Figure 5 Flow chart of the fourth embodiment of the automobile air spring control method of the present application;

[0053] Figure 6 Schematic diagram of the automobile air spring control system of the present application. DETAILED DESCRIPTION

[0054] Various illustrative embodiments of the present application will now be described in detail with reference to the accompanying figures. It is noted that the relative arrangements, numerical expressions, and values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0055] The following description of at least one illustrative embodiment is merely exemplary in nature and is in no way intended to limit the present application or its application or uses.

[0056] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0057] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0058] As Figures 1 to 5 shown, the embodiment of the present application provides a vehicle air spring control method, comprising:

[0059] Step S100, acquiring the body state information of the target vehicle;

[0060] Step S200, judging whether the vehicle is in an adjustable state based on the body state signal, if yes, issuing an air spring adjustment request; if no, stopping the adjustment program or re-acquiring the body state information of the target vehicle.

[0061] Specifically, the current state of the target vehicle can be determined according to the body state information, and if the vehicle is currently in an adjustable state, the air spring control system can respond to the relevant adjustment instructions and perform the corresponding adjustment action at this time.

[0062] Step S300, determining the air spring adjustment action according to the air spring adjustment request issued by the target vehicle;

[0063] Specifically, when the target vehicle issues an air spring adjustment request based on its own driving demand or driver's instruction, relying on the pre-constructed mathematical model and control algorithm, many key factors are comprehensively considered, such as vehicle speed, acceleration, body posture, etc., and the system generates and determines the specific adjustment action of the air spring according to the established rules, so that the vehicle air spring system reaches the expected performance state, and meets the requirements of the target vehicle for driving stability, maneuverability and ride comfort in a specific scene.

[0064] Step S400, adjusting the vehicle height based on the air spring adjustment action request.

[0065] Specifically, after receiving the air spring adjustment action request generated based on the actual driving demand or driving instruction of the vehicle, the system will accurately control the compressor to fill or discharge an appropriate amount of gas into the air spring, or command the reasonable transfer of gas between the gas tank and the air spring, so as to change the air pressure inside the air spring, and then change its elastic supporting force, and finally realize the accurate adjustment of the vehicle height, so that the vehicle height fits the current driving condition and driving demand, and ensures that the vehicle maintains good stability, passability and comfort during driving.

[0066] In one embodiment of the vehicle air spring control method of the present application, as Figure 1 and Figure 2 shown, the acquisition of the body state information of the target vehicle comprises:

[0067] Step S101, obtaining the acceleration value of the vehicle acceleration state or deceleration state of the target vehicle, and the body off-road height;

[0068] Step S102, based on the acceleration value of the vehicle acceleration state or deceleration state, the body rotation angular velocity is calculated, and the body state information signal is sent out;

[0069] Specifically, the acceleration value of the vehicle acceleration and deceleration obtained by the accelerometer, the body rotation angular velocity measured by the gyroscope, and the body off-road height obtained by the height sensor are analyzed and processed by a specific algorithm, which constitutes the body state information and provides a key basis for precise control of the air spring and other vehicle systems to ensure the stability, safety and comfort of the vehicle.

[0070] Step S103, processing and unit conversion of the sent body state information signal;

[0071] Step S104, calculating and filtering the processed signal to obtain accurate and real signals.

[0072] In the vehicle state data acquisition process, first, the multi-dimensional body state information of the target vehicle is collected by using various sensors.

[0073] Then, the original signal output by the sensor is processed to remove interference, correct deviation, and converted into a unified unit to improve data usability.

[0074] Finally, the processed signal is deeply calculated by using algorithm and filtering technology, and the noise and abnormal fluctuation are filtered out to obtain accurate and real signals that can accurately reflect the actual state of the vehicle, and provide reliable basis for subsequent decision and control.

[0075] In one embodiment of the automobile air spring control method of the present application, as shown in Figure 3 The determination of whether the vehicle is in an adjustable state based on the body state signal comprises:

[0076] Step S201, obtaining the door state information of each door of the target vehicle;

[0077] Step S202, determining whether each door is in a closed state based on the door state information, and if so, sending an air spring adjustment request.

[0078] Further, if the door is in a closed state, the following steps are further included:

[0079] Step S2021, obtaining the height change rate of the height sensor;

[0080] Step S2022, determining whether the height change rate is less than a preset rate based on the height change rate, and if yes, issuing an air spring adjustment request. If the height change rate is greater than or equal to the preset rate, stopping the adjustment program or reacquiring the body state information of the target vehicle.

[0081] Further, if the height change rate is less than the preset rate, the following steps are further included:

[0082] Step S2023, acquiring the state information of the air spring system of the target vehicle;

[0083] Step S2024, determining whether the air spring system of the target vehicle is currently in an activated state based on the state information of the air spring system, and if yes, issuing an air spring adjustment request. If the air spring system of the target vehicle is not currently in the activated state, stopping the adjustment program or reacquiring the body state information of the target vehicle.

[0084] In the process of determining the state of the air spring system of the target vehicle, the closure states of each door of the target vehicle are accurately detected by means of a vehicle door sensor and other devices, and the overall closure integrity of the vehicle is confirmed, thereby providing a basic condition judgment for subsequent air spring system related operations.

[0085] If each door is in the closed state, the next step can be entered. By analyzing the data collected by the height sensor, the height change rate is calculated and compared with the preset rate threshold to determine the stability of the vehicle driving state. If the height change rate is less than the preset rate, it indicates that the vehicle driving state is relatively stable, and the next step is entered. According to the activation logic and determination criteria set internally by the system, it is determined whether the air spring system of the target vehicle is currently in an activated state.

[0086] In one embodiment of the automobile air spring control method of the present application, as shown in Figure 4 According to the air spring adjustment request issued by the target vehicle, the air spring adjustment action includes:

[0087] Step S301, determining the target height of the air spring adjustment corresponding to the adjustment gear issued by the target vehicle;

[0088] Step S302, determining whether the target height can be reached according to the body state information;

[0089] Step S303, calculating the difference between the target height and the current actual height;

[0090] Step S304, performing front and rear axle balance adjustment on the vehicle;

[0091] Step S305, determining the air spring adjustment action.

[0092] In the adjustment decision process of the air spring system, first, according to the pre-established mapping relationship, the target vehicle issued adjustment gear is accurately corresponded to a specific air spring adjustment height, so as to provide a clear height target for the adjustment operation.

[0093] Then, combined with the current vehicle body state information, including but not limited to the load distribution of the vehicle, the driving speed, the road condition and other factors, it is judged whether the target height can be achieved under the current actual working condition, so as to ensure the feasibility of the adjustment target. If the target height is feasible, the difference between the target height and the current actual height of the vehicle is calculated, and the height adjustment demand is quantified, so as to provide key numerical basis for the accurate execution of subsequent adjustment action.

[0094] Then, considering the importance of front and rear axle stress and balance during vehicle driving, based on vehicle dynamics theory, the load, height change and other parameters of front and rear axle are analyzed and calculated comprehensively, and front and rear axle balance adjustment is implemented to optimize the driving stability and handling performance of the vehicle.

[0095] Finally, the analysis results of the above steps are integrated, and the final air spring adjustment action request is determined according to the control logic and strategy of the air spring system, which will be issued as an instruction to the air spring actuator to realize the precise adjustment of the vehicle height and meet the performance requirements of the vehicle under different working conditions.

[0096] In one embodiment of the air spring control method of the present application, as shown in Figure 5 Based on the air spring adjustment action request, the vehicle height is adjusted, including:

[0097] Step S401, acquiring the current pressure value of the gas tank;

[0098] Step S402, selecting a pressure source based on the current pressure value of the gas tank;

[0099] Step S403, judging whether the gas tank and the compressor are in the activated state, if yes, executing the height adjustment action.

[0100] In the execution stage of the vehicle air spring height adjustment, according to the pressure value monitored by the gas tank in real time, through the pre-set pressure source selection strategy, the appropriate pressure supply source is selected from the two potential pressure sources of the gas tank itself and the compressor.

[0101] Then, the running state of the gas tank and the compressor, the two key components, needs to be determined to confirm whether they are in the activated state. This judgment depends on the real-time collection and analysis of the system on the working parameters, control signals and feedback information of the components, so as to ensure that the related components have the conditions to respond to the adjustment instruction.

[0102] Finally, the system issues precise instructions to the compressor or air tank in the active state based on the previously determined air spring adjustment action request, so that it performs highly adjusted actions according to the predetermined adjustment logic and parameters, thereby realizing accurate regulation of the air spring height and meeting the dynamic performance requirements of the vehicle during driving.

[0103] According to a second aspect of the present application, a vehicle air spring control system is provided, as shown in the accompanying drawings. Figure 6 The vehicle air spring control system comprises a reading module, a calculation module, a judgment module, a request module and an execution module.

[0104] The reading module is configured to collect various sensor signals on the target vehicle in real time, and unify the signal units according to a preset rule to provide standard input for the system.

[0105] The calculation module is connected with the reading module, and is configured to filter, correct and calculate the sensor signals to provide accurate signals for the subsequent modules.

[0106] The judgment module is connected with the calculation module, and is configured to consider the vehicle body state and other factors to determine whether the vehicle can be adjusted based on the accurate signals output by the calculation module.

[0107] The request module is connected with the judgment module, and is configured to determine the air spring adjustment action and issue an air spring adjustment action request.

[0108] The execution request is connected with the request module, and is configured to execute the vehicle height adjustment action.

[0109] The present application has the following advantages:

[0110] 1. Improved data reliability: By collecting multi-dimensional vehicle body state information and performing a series of processes such as removing interference, correcting deviation, unifying units and deep calculation on the original signals, accurate and real signals reflecting the actual state of the vehicle can be obtained.

[0111] 2. Optimizing system operation efficiency: Accurately determining whether the vehicle is in a tunable state avoids ineffective adjustment attempts by the system at inappropriate times. Only subsequent adjustment actions are performed in appropriate states, reducing unnecessary system calculations and operations, improving the operating efficiency of the air spring system, and prolonging the service life of the components.

[0112] 3. Achieving precise adjustment: Determining air spring adjustment actions based on the air spring adjustment request issued by the target vehicle allows for precise adjustment according to the actual needs of the vehicle. For example, when the vehicle encounters different load conditions or changes in driving conditions, the system can accurately make corresponding adjustment actions based on the request, so that the working state of the air spring matches the actual needs of the vehicle, improving the overall performance of the vehicle.

[0113] 4. Enhancing vehicle passability and applicability: Reasonable vehicle height adjustment can adjust the vehicle's ground clearance according to different road conditions and driving needs. For example, appropriately raising the vehicle height when passing rough roads improves the vehicle's passability, and lowering the vehicle height when driving at high speed reduces wind resistance and improves fuel economy. This allows the vehicle to adapt to more different use scenarios, enhancing the applicability of the vehicle.

[0114] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A method of controlling an automotive air spring, characterized by, The method comprises the following steps: acquiring body state information of a target vehicle; judging whether the vehicle is in an adjustable state based on the body state signal, and issuing an air spring adjustment request if the vehicle is in the adjustable state; determining an air spring adjustment action according to the air spring adjustment request issued by the target vehicle; adjusting the height of the vehicle based on the air spring adjustment action request.

2. The automotive air spring control method according to claim 1, characterized by, The step of acquiring the body state information of the target vehicle comprises the following steps: obtaining the acceleration value of the target vehicle in an acceleration state or a deceleration state, and the ground clearance of the vehicle body; calculating the body rotation angular velocity based on the acceleration value in the acceleration state or the deceleration state, and issuing a body state information signal; processing and unit conversion of the issued body state information signal; calculating and filtering the processed signal to obtain an accurate and true signal.

3. The automotive air spring control method according to claim 1, characterized by, The step of judging whether the vehicle is in the adjustable state based on the body state signal comprises the following steps: acquiring the door state information of each door of the target vehicle; judging whether each door is in a closed state based on the door state information, and issuing an air spring adjustment request if the door is in the closed state.

4. The automotive air spring control method according to claim 3, characterized by, If the door is in the closed state, the following steps are further included: obtaining the height change rate of the height sensor; judging whether the height change rate is less than a preset rate based on the height change rate, and issuing an air spring adjustment request if the height change rate is less than the preset rate.

5. The automotive air spring control method according to claim 4, characterized by, If the height change rate is less than the preset rate, the following steps are further included: obtaining the state information of the air spring system of the target vehicle; judging whether the air spring system of the target vehicle is in an activated state based on the state information of the air spring system, and issuing an air spring adjustment request if the air spring system is in the activated state.

6. The automotive air spring control method according to claim 1, characterized by, The step of determining the air spring adjustment action according to the air spring adjustment request issued by the target vehicle comprises the following steps: corresponding the target height of the air spring adjustment to the adjustment gear issued by the target vehicle; judging whether the target height can be reached based on the body state information; calculating the difference between the target height and the current actual height; performing front and rear axle balance adjustment on the vehicle; determining the air spring adjustment action.

7. The automotive air spring control method according to claim 1, characterized by, The step of adjusting the height of the vehicle based on the air spring adjustment action request comprises the following steps: obtaining the current pressure value of the gas tank; selecting a pressure source based on the current pressure value of the gas tank; judging whether the gas tank and the compressor are in an activated state, and performing height adjustment action if the gas tank and the compressor are in the activated state.

8. An automotive air spring control system characterized by comprising: The automobile air spring control system comprises a reading module, a calculation module, a judgment module, a request module, and an execution module. The reading module is used to read sensor signals. The calculation module is connected with the reading module, and is used to filter, correct, and solve the signals. The judgment module is connected with the calculation module, and is used to judge whether the vehicle is in an adjustable state under normal working conditions. The request module is connected with the judgment module, and is used to determine an air spring adjustment action and issue an air spring adjustment action request. The execution request is connected with the request module, and is used to perform a vehicle height adjustment action.

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