Vehicle air spring control method, device and system

Abstract

The invention relates to a control method, device and system for a vehicle air spring, and the method comprises the steps: determining the current driving state of a vehicle based on the state parameters of the vehicle; under the condition that the current driving state meets a first preset condition, based on a driving mode of the vehicle and the current driving state, control information for an air spring of the vehicle is determined; and adjusting the height of an air spring mounted on a front axle or a rear axle of the air suspension system of the vehicle based on the control information. The purpose of automatically adjusting the air spring in multiple scenes is achieved, so that adjustment and compensation of the gravity center of the vehicle are completed, and the effects of optimizing the driving performance of the vehicle and improving the driving confidence of a driver are achieved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a control method, device and system for a vehicle air spring. Background Art

[0002] The center of gravity of a vehicle is one of the important basic parameters of a vehicle. It has a significant impact on the vehicle's dynamic performance and even affects the vehicle's driving safety.

[0003] When the vehicle is stationary, the position of the vehicle's center of gravity is stable. When the vehicle is in motion, the position of the vehicle's center of gravity will change with the change of the motion state, and this change will have a greater impact on the direction of movement of the vehicle. Therefore, if the right center of gravity is generated at the right time and under the right working conditions, it will help the vehicle to drive with the correct body dynamics. Otherwise, it will hinder the vehicle from driving with the correct body dynamics.

[0004] Therefore, how to adjust the center of gravity of the vehicle so that the vehicle can travel with correct body dynamics has become an urgent problem to be solved. Summary of the invention

[0005] One of the purposes of the present invention is to provide a control method for a vehicle air spring to solve the problem of adjusting the center of gravity of the vehicle; the second purpose is to provide a control device for a vehicle air spring; the third purpose is to provide a control system for a vehicle air spring.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A method for controlling a vehicle air spring comprises: determining a current driving state of the vehicle based on a state parameter of the vehicle;

[0008] When the current driving state satisfies a first preset condition, control information for the air spring of the vehicle is determined based on the driving mode of the vehicle and the current driving state; and based on the control information, the height of the air spring installed on the front axle or rear axle of the air suspension system of the vehicle is adjusted.

[0009] According to the above-mentioned technical means, during vehicle driving, when the driving state of the vehicle meets the first preset condition, the adjustment method of the vehicle air spring is further determined in combination with the vehicle driving mode, that is, the purpose of automatically adjusting the air spring in multiple scenarios is achieved, thereby completing the adjustment and compensation of the vehicle's center of gravity, thereby achieving the effect of optimizing the vehicle's driving performance and enhancing the driver's driving confidence.

[0010] Further, the first preset condition is that the current driving state is an uphill state or a downhill state, and the slope corresponding to the current driving state is greater than the corresponding slope threshold, and the duration corresponding to the current driving state is greater than the first time threshold;

[0011] The determining, based on the driving mode of the vehicle and the target driving state, control information for the air spring of the vehicle includes:

[0012] Based on the slope corresponding to the current driving state, control information for an air spring of the vehicle is determined.

[0013] According to the above technical means, it is clarified that in a scenario where the vehicle is in an uphill state or a downhill state, control information for the air spring is determined based on the slope.

[0014] Further, the current driving state is an uphill state;

[0015] The determining, based on the driving mode of the vehicle and the slope corresponding to the current driving state, control information for the air spring of the vehicle comprises one of the following:

[0016] In a case where the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the uphill state, determining to raise an air spring installed on a rear axle of an air suspension system of the vehicle to a first height;

[0017] In a case where the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the uphill state, it is determined that an air spring installed on a front axle of an air suspension system of the vehicle is raised to a second height.

[0018] According to the above technical means, by further distinguishing the driving mode of the vehicle in the uphill state, the control method of the vehicle's air spring can be determined more accurately, so as to better adjust and compensate the vehicle's center of gravity, optimize the vehicle's driving performance during the uphill process, and thus improve the driver's driving confidence during the uphill process.

[0019] Further, the current driving state is a downhill state;

[0020] The determining, based on the driving mode of the vehicle and the slope corresponding to the current driving state, control information for the air spring of the vehicle comprises one of the following:

[0021] In a case where the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the downhill state, determining to raise the air spring of the front axle installed in the air suspension system of the vehicle to a third height;

[0022] In a case where the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the downhill state, it is determined that an air spring installed on a rear axle of an air suspension system of the vehicle is raised to a fourth height.

[0023] According to the above technical means, by further distinguishing the driving mode of the vehicle in the downhill state, the control method of the vehicle's air spring can be determined more accurately, so as to better adjust and compensate the vehicle's center of gravity, optimize the vehicle's driving performance during the downhill process, and thus improve the driver's driving confidence during the downhill process.

[0024] Further, the first preset condition is that the current driving state is a sudden acceleration state or a sudden deceleration state, and the absolute value of the acceleration corresponding to the current driving state is greater than the corresponding acceleration threshold, and the duration corresponding to the current driving state is greater than the second time threshold;

[0025] The determining, based on the driving mode of the vehicle and the current driving state, control information for the air spring of the vehicle includes:

[0026] Based on the driving mode of the vehicle and the acceleration corresponding to the current driving state, control information for the air spring of the vehicle is determined.

[0027] According to the above technical means, it is clarified that in a scenario where the vehicle is in a rapid acceleration state or a rapid deceleration state, control information for the air spring is determined based on acceleration.

[0028] Further, the current driving state is a rapid deceleration state;

[0029] The determining of control information for the air spring of the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state includes one of the following:

[0030] In a case where the driving mode of the vehicle is front-wheel drive, determining to raise an air spring installed on a rear axle of an air suspension system of the vehicle to a fifth height based on the acceleration corresponding to the rapid deceleration state;

[0031] When the driving mode of the vehicle is rear-wheel drive, it is determined to raise the air spring of the front axle installed in the air suspension system of the vehicle to a sixth height based on the acceleration corresponding to the rapid deceleration state.

[0032] According to the above technical means, by further distinguishing the driving mode of the vehicle in the state of rapid deceleration, the control method of the vehicle's air spring can be determined more accurately, so as to better adjust and compensate the vehicle's center of gravity, optimize the vehicle's driving performance during rapid deceleration, and thus improve the driver's driving confidence in the state of rapid deceleration.

[0033] Further, the current driving state is a rapid acceleration state;

[0034] The determining of control information for the air spring of the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state includes one of the following:

[0035] In a case where the driving mode of the vehicle is front-wheel drive, based on the acceleration corresponding to the rapid acceleration state, determining to raise the air spring of the front axle of the air suspension system installed in the vehicle to a seventh height;

[0036] In a case where the driving mode of the vehicle is rear-wheel drive, based on the acceleration corresponding to the rapid acceleration state, it is determined that an air spring installed on a rear axle of an air suspension system of the vehicle is raised to an eighth height.

[0037] According to the above technical means, by further distinguishing the driving mode of the vehicle under rapid acceleration, the control method of the vehicle's air spring can be determined more accurately, so as to better adjust and compensate the vehicle's center of gravity, optimize the vehicle's driving performance during rapid acceleration, and thus improve the driver's driving confidence under rapid acceleration.

[0038] Further, after adjusting the height of the air spring installed on the front axle or the rear axle of the air suspension system of the vehicle based on the control information, the method further includes:

[0039] Obtaining updated state parameters of the vehicle;

[0040] In a case where the updated state parameter satisfies a second preset condition, determining updated control information for an air spring of the vehicle;

[0041] Based on the updated control information, the height of the front axle or rear axle air spring installed in the air suspension system of the vehicle is restored to the initial height.

[0042] According to the above technical means, by real-time detection of the vehicle's status parameters, and when the updated status parameters meet the second preset condition, the air spring is restored to the initial height, thereby adjusting the vehicle's control logic in combination with the vehicle's real-time status parameters, thereby reducing the computing resource requirements of the vehicle control unit and reducing the mechanical wear of the vehicle.

[0043] A control device for a vehicle air spring, comprising:

[0044] A first determination module, configured to determine a current driving state of the vehicle based on a state parameter of the vehicle;

[0045] A second determination module, configured to determine control information for an air spring of the vehicle based on a driving mode of the vehicle and a target driving state when the current state satisfies a first preset condition;

[0046] An adjustment module is used to adjust the height of an air spring installed on a front axle or a rear axle of an air suspension system of the vehicle based on the control information.

[0047] A control system for a vehicle air spring includes a plurality of sensors, a first controller and a second controller; wherein:

[0048] The multiple sensors are used to collect status parameters of the vehicle;

[0049] The first controller is connected to the plurality of sensors in communication to receive the state parameters; based on the state parameters, determines the current driving state of the vehicle; and when the current driving state satisfies a first preset condition, determines control information for the air spring of the vehicle based on the driving mode of the vehicle and the current driving state;

[0050] The second controller receives the control information from the first controller to adjust the height of an air spring installed at a front axle or a rear axle of an air suspension system of the vehicle based on the control information.

[0051] Beneficial effects of the present invention:

[0052] During vehicle driving, when the vehicle's driving state meets the first preset condition, the adjustment method of the vehicle's air spring is further determined in combination with the vehicle's driving mode, that is, the purpose of automatically adjusting the air spring in multiple scenarios is achieved, thereby completing the adjustment and compensation of the vehicle's center of gravity, thereby optimizing the vehicle's driving performance and improving the driver's driving confidence. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the implementation flow of a vehicle air spring control method provided by the present invention;

[0054] Figure 2 A schematic diagram of the structure of a vehicle air spring control device provided by the present invention;

[0055] Figure 3 A system block diagram of a control system for a vehicle air spring provided by the present invention;

[0056] Figure 4 A schematic diagram of an implementation flow of an embodiment of the vehicle air spring control system provided by the present invention;

[0057] Figure 5A schematic diagram of the implementation flow of an embodiment of the first controller exiting the adaptive adjustment function in the vehicle air spring control system provided by the present invention;

[0058] Figure 6 A control logic diagram of a first controller in a vehicle air spring control system provided by the present invention for implementing an adaptive adjustment function. DETAILED DESCRIPTION

[0059] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0060] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0061] The present invention proposes a control method for a vehicle air spring, which can be implemented by a controller installed in the vehicle, such as an electronic control unit (ECU), a vehicle motion control unit (VMC), and the like. Figure 1 A schematic diagram of the implementation flow of a vehicle air spring control method provided by the present invention is shown in FIG. Figure 1 As shown, the method includes the following steps S101 to S103:

[0062] Step S101, determining the current driving state of the vehicle based on the state parameters of the vehicle.

[0063] Here, the vehicle state parameters refer to the vehicle driving related data collected during the vehicle driving process.

[0064] In some embodiments, the state parameters of the vehicle may include engine torque data, gear data, accelerator pedal position data, brake pedal position data, wheel speed data, lateral acceleration data, longitudinal acceleration data, and the like.

[0065] In some embodiments, a vehicle is equipped with a torque sensor to obtain real torque data of the vehicle engine through the torque sensor.

[0066] In some embodiments, the vehicle is equipped with a power controller to obtain the gear position data of the vehicle through the power controller.

[0067] In some embodiments, the vehicle is equipped with a potentiometer sensor or a Hall sensor to obtain the accelerator pedal position data of the vehicle through the potentiometer sensor or the Hall sensor.

[0068] In some embodiments, the vehicle is equipped with a brake pedal position sensor to obtain brake pedal position data of the vehicle through the brake pedal position sensor.

[0069] In some embodiments, the vehicle is equipped with a left front wheel speed sensor, a right front wheel speed sensor, a left rear wheel speed sensor and a right rear wheel speed sensor, so as to obtain wheel speed data of the corresponding wheels respectively through the four wheel speed sensors. At the same time, lateral acceleration data and longitudinal acceleration data can also be calculated through the wheel speed data obtained by the four wheel speed sensors.

[0070] In some embodiments, the vehicle is equipped with an inertial sensor to obtain the vehicle's entire acceleration data, tilt angle data, and rotation state data through the inertial sensor.

[0071] In some embodiments, the vehicle is equipped with an ignition (IGN) signal acquisition unit to acquire an ignition signal of the vehicle through the IGN signal acquisition unit.

[0072] In this way, various sensor data during the vehicle's driving process are acquired through various sensors installed on the vehicle, and the vehicle's current driving state is determined based on the various sensor data, that is, the vehicle's current driving state is determined based on multimodal data related to the vehicle.

[0073] In some embodiments, multimodal data related to the vehicle may be input into a recognition model to determine the current driving state of the vehicle using the recognition model. For example, the vehicle's engine torque data, gear data, accelerator pedal position data, brake pedal position data, wheel speed data, lateral acceleration data, and longitudinal acceleration data may be input into the recognition model to determine whether the vehicle is currently in an uphill state or a downhill state; for another example, the vehicle's accelerator pedal position data, brake pedal position data, wheel speed data, longitudinal acceleration data, etc. may be input into the recognition model to determine whether the vehicle is currently in a rapid acceleration state or a rapid deceleration state.

[0074] Step S102, when the current driving state satisfies a first preset condition, based on the driving mode of the vehicle and the current driving state, determining control information for the air spring of the vehicle.

[0075] Here, the first preset condition refers to a vehicle driving state condition that requires adjustment of the air spring of the vehicle.

[0076] In some embodiments, when the current driving state meets the first preset condition, the vehicle's adaptive adjustment function is activated to determine control information for the vehicle's air spring based on the vehicle's driving mode and the current driving state.

[0077] During daily use of a vehicle, acceleration, braking, steering, climbing and descending are common driving behaviors that change the center of gravity of the vehicle. Therefore, in some embodiments, the current driving state satisfies the first preset condition, which at least includes that the current driving state of the vehicle is at least one of a rapid acceleration state, a rapid deceleration state, an uphill state and a downhill state.

[0078] The driving mode of a vehicle refers to the position of the vehicle engine and the position of the drive wheels. Here, the driving mode of a vehicle includes front drive and rear drive.

[0079] Since the vehicle's driving mode is related to the vehicle's equivalent slope, driving efficiency, etc., and the vehicle's equivalent slope and driving efficiency are respectively related to the vehicle's uphill and downhill capabilities, rapid acceleration and rapid deceleration capabilities, the control information for the vehicle's air spring is determined based on the vehicle's driving mode and the current driving state, that is, the adjustment information for the front axle height or rear axle height of the air spring is determined.

[0080] Step S103: adjusting the height of the air spring installed on the front axle or the rear axle of the air suspension system of the vehicle based on the control information.

[0081] An air spring is a spring that uses the elasticity of air. It achieves its elasticity by filling a retractable closed container with compressed air. When an air spring is applied to a vehicle system, the air spring can be installed on the front and rear axles of the vehicle's air suspension system to change the height of the vehicle body and the stiffness of the suspension system, thereby better adapting to different road conditions and driving conditions.

[0082] In this way, according to the control information, when the air springs installed on the front axle of the air suspension system are adjusted (for example, raised or lowered), the height of the front end of the vehicle's body is raised or lowered; according to the control information, when the air springs installed on the rear axle of the air suspension system are adjusted (for example, raised or lowered), the height of the rear end of the vehicle's body is raised or lowered.

[0083] In the vehicle air spring control method provided by the present invention, first, the current driving state of the vehicle is determined based on the state parameters of the vehicle; then, when the current driving state meets the first preset condition, the control information for the air spring of the vehicle is determined based on the driving mode of the vehicle and the current driving state; finally, based on the control information, the height of the air spring installed on the front axle or rear axle of the air suspension system of the vehicle is adjusted. In this way, during the driving process of the vehicle, when the driving state of the vehicle meets the first preset condition, the adjustment method of the vehicle air spring is further determined in combination with the driving mode of the vehicle, that is, the purpose of automatically adjusting the air spring in multiple scenarios is achieved, thereby completing the adjustment and compensation of the center of gravity of the vehicle, and achieving the effect of optimizing the driving performance of the vehicle and improving the driving confidence of the driver.

[0084] In some embodiments, the first preset condition is that the current driving state is an uphill state or a downhill state, and the slope corresponding to the current driving state is greater than the corresponding slope threshold, and the duration corresponding to the current driving state is greater than the first time threshold.

[0085] Here, since uphill and downhill are common driving behaviors that change the center of gravity of the vehicle, when the current driving state is an uphill state or a downhill state, it is necessary to consider adjusting and compensating the center of gravity of the vehicle.

[0086] At the same time, considering that in the uphill state and the downhill state, if the uphill and downhill slopes are small, for example, less than 10°, the slope has little effect on the center of gravity of the vehicle, and there is no need to adjust the center of gravity of the vehicle. Therefore, the first preset condition also includes that the slope corresponding to the current driving state is greater than the corresponding slope threshold. For example, the uphill slope is greater than the first slope threshold, and the downhill slope is greater than the second slope threshold; wherein the first slope threshold and the second slope threshold can be the same or different, and are independent of each other.

[0087] In addition, when the uphill state or downhill state is maintained for a short time, for example, less than 10 seconds, the uphill state or downhill state has a short impact on the center of gravity of the vehicle, and there is no need to adjust the center of gravity of the vehicle. Therefore, the first preset condition also includes that the duration corresponding to the current driving state is greater than the first time threshold. For example, the duration of the uphill state is greater than the first uphill time threshold, and the duration of the downhill state is greater than the first downhill time threshold; wherein the first uphill time threshold and the first downhill time threshold can be the same or different, and are independent of each other.

[0088] In this way, the step S102 of determining the control information for the air spring of the vehicle based on the driving mode of the vehicle and the current driving state can be implemented as the following step S1021:

[0089] Step S1021, determining control information for the air spring of the vehicle based on the driving mode of the vehicle and the slope corresponding to the current driving state.

[0090] Here, based on the slope corresponding to the uphill state or downhill state, the control information for the air spring is determined, that is, the height adjustment information for the air spring installed on the front axle of the air suspension system is determined, or the height adjustment information for the air spring installed on the rear axle of the air suspension system is determined. For example, when going uphill or downhill, by adjusting the height of the air spring, the vehicle body can be raised and the equivalent slope of the vehicle can be increased, thereby improving the uphill or downhill ability of the vehicle.

[0091] In addition, the maximum equivalent slope is calculated differently for vehicles with different driving modes.

[0092] For front-wheel drive vehicles, the maximum equivalent slope is q1 It can be calculated by the following formula (1):

[0093]

[0094] Wherein, b represents the distance from the center of gravity of the vehicle to the rear axle of the vehicle air suspension system; Indicates the road adhesion coefficient; h g It represents the height of the vehicle's center of gravity; L represents the wheelbase of the vehicle's air suspension system.

[0095] For rear-wheel drive vehicles, the maximum equivalent slope is q2 It can be calculated by the following formula (2):

[0096]

[0097] Where a represents the distance from the center of gravity of the vehicle to the front axle of the vehicle air suspension system; Indicates the road adhesion coefficient; h g It represents the height of the vehicle's center of gravity; L represents the wheelbase of the vehicle's air suspension system.

[0098] It can be seen from the above formulas (1) and (2) that when a front-wheel drive vehicle is in an uphill state, in order to increase the maximum equivalent slope, it is necessary to raise the rear axle of the air suspension system so that the center of gravity of the vehicle moves toward the front axle; and when a rear-wheel drive vehicle is in an uphill state, in order to increase the maximum equivalent slope, it is necessary to raise the front axle of the air suspension system so that the center of gravity of the vehicle moves toward the rear axle.

[0099] Therefore, in some embodiments, when the current driving state is an uphill state, the control information for the air spring of the vehicle is determined based on the driving mode of the vehicle and the slope corresponding to the current driving state, that is, the above step S1021, can be implemented as one of the following steps S1022 to S1023:

[0100] Step S1022, when the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the uphill state, determining to raise the air spring installed on the rear axle of the air suspension system of the vehicle to a first height;

[0101] Step S1023, when the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the uphill state, determine to raise the air spring installed on the front axle of the air suspension system of the vehicle to a second height.

[0102] Here, the first height and the second height are heights determined for the front-wheel drive vehicle and the rear-wheel drive vehicle, respectively, based on the gradient of the uphill state.

[0103] In some embodiments, the first height and the second height corresponding to different slopes can be determined respectively by calibration.

[0104] In some embodiments, the first height and the second height corresponding to the front-wheel drive vehicle and the rear-wheel drive vehicle may be determined based on the slope corresponding to the uphill state and the load of the vehicle.

[0105] In some embodiments, the first height and the second height corresponding to the front-wheel drive vehicle and the rear-wheel drive vehicle may be determined based on the slope corresponding to the uphill state, the load of the vehicle, and the adhesion coefficient of the vehicle tires.

[0106] In the above embodiment, for a front-wheel drive vehicle in an uphill state, the air spring installed on the rear axle of the air suspension system of the vehicle is raised; for a rear-wheel drive vehicle in an uphill state, the air spring installed on the front axle of the air suspension system of the vehicle is raised. In this way, by further distinguishing the driving mode of the vehicle in the uphill state, the control mode of the air spring of the vehicle can be more accurately determined, thereby better adjusting and compensating the center of gravity of the vehicle, optimizing the driving performance of the vehicle in the uphill process, and thus improving the driving confidence of the driver in the uphill process.

[0107] At the same time, based on the above formulas (1) and (2), it can be seen that, in contrast to the direction of movement of the vehicle's center of gravity during the uphill process, when a front-wheel drive vehicle is in a downhill state, in order to increase the maximum equivalent slope, the front axle of the air suspension system needs to be raised so that the vehicle's center of gravity moves toward the rear axle; and when a rear-wheel drive vehicle is in a downhill state, in order to increase the maximum equivalent slope, the rear axle of the air suspension system needs to be raised so that the vehicle's center of gravity moves toward the front axle.

[0108] Therefore, in some embodiments, when the current driving state is a downhill state, the control information for the air spring of the vehicle is determined based on the driving mode of the vehicle and the slope corresponding to the current driving state, that is, the above step S1021, can be implemented as one of the following steps S1024 to S1025:

[0109] Step S1024, when the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the downhill state, determining to raise the air spring installed on the front axle of the air suspension system of the vehicle to a third height;

[0110] Step S1025, when the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the downhill state, determine to raise the air spring of the rear axle installed in the air suspension system of the vehicle to a fourth height.

[0111] Here, the third height and the fourth height are heights determined for the front-wheel drive vehicle and the rear-wheel drive vehicle, respectively, based on the gradient of the downhill state.

[0112] In some embodiments, the third height and the fourth height corresponding to different slopes can be determined respectively by calibration.

[0113] In some embodiments, the third height and the fourth height corresponding to the front-wheel drive vehicle and the rear-wheel drive vehicle may be determined based on the slope corresponding to the downhill state and the load of the vehicle.

[0114] In some embodiments, the third height and the fourth height corresponding to the front-wheel drive vehicle and the rear-wheel drive vehicle may be determined based on the slope corresponding to the downhill state, the load of the vehicle and the adhesion coefficient of the vehicle tires.

[0115] In the above embodiment, for a front-wheel drive vehicle in a downhill state, the air spring installed on the front axle of the air suspension system of the vehicle is raised; for a rear-wheel drive vehicle in a downhill state, the air spring installed on the rear axle of the air suspension system of the vehicle is raised. In this way, by further distinguishing the driving mode of the vehicle in the downhill state, the control mode of the air spring of the vehicle can be more accurately determined, thereby better adjusting and compensating the center of gravity of the vehicle, optimizing the driving performance of the vehicle in the downhill process, and thus improving the driving confidence of the driver in the downhill process.

[0116] In some embodiments, the first preset condition is that the current driving state is a rapid acceleration state or a rapid deceleration state, and the absolute value of the acceleration corresponding to the current driving state is greater than the corresponding acceleration threshold, and the duration corresponding to the current driving state is greater than the second time threshold.

[0117] Here, since sudden acceleration and sudden deceleration are common driving behaviors that change the center of gravity of the vehicle, when the current driving state is a sudden acceleration state or a sudden deceleration state, it is necessary to consider adjusting and compensating the center of gravity of the vehicle.

[0118] At the same time, considering that in a sudden acceleration state or a sudden deceleration state, if the absolute value of the acceleration is small, the sudden acceleration or deceleration behavior has a small impact on the center of gravity of the vehicle, and there is no need to adjust the center of gravity of the vehicle. Therefore, the first preset condition also includes that the absolute value of the acceleration corresponding to the current driving state is greater than the corresponding slope threshold. For example, the absolute value of the acceleration in the sudden acceleration state is greater than the first acceleration threshold, and the absolute value of the acceleration in the sudden deceleration state is greater than the second acceleration threshold; wherein the absolute values ​​of the first acceleration threshold and the second acceleration threshold can be the same or different, and are independent of each other.

[0119] In addition, when the rapid acceleration state or the rapid deceleration state is maintained for a short time, for example, less than 10 seconds, the rapid acceleration state or the rapid deceleration state has a short impact on the center of gravity of the vehicle, and there is no need to adjust the center of gravity of the vehicle. Therefore, the first preset condition also includes that the duration corresponding to the current driving state is greater than the second time threshold. For example, the duration of the rapid acceleration state is greater than the second rapid acceleration time threshold, and the duration of the rapid deceleration state is greater than the second rapid deceleration time threshold; wherein the second rapid acceleration time threshold and the second rapid deceleration time threshold can be the same or different, and are independent of each other.

[0120] In this way, the step S102 of determining the control information for the air spring of the vehicle based on the driving mode of the vehicle and the target driving state can be implemented as the following step S1026:

[0121] Step S1026: Determine control information for the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state.

[0122] Here, based on the absolute value of the acceleration corresponding to the sudden acceleration state or the sudden deceleration state, the control information for the air spring is determined, that is, the height adjustment information of the air spring installed on the front axle of the air suspension system, or the height adjustment information of the air spring installed on the rear axle of the air suspension system. For example, during sudden acceleration or sudden deceleration, the braking efficiency of the vehicle can be adjusted by adjusting the height of the air spring.

[0123] In addition, the braking efficiency is calculated differently for vehicles with different driving modes.

[0124] For front-wheel drive vehicles, the braking efficiency E r1 It can be calculated by the following formula (3):

[0125]

[0126] Wherein, b represents the distance from the center of gravity of the vehicle to the rear axle of the vehicle air suspension system; Indicates the road adhesion coefficient; h g It represents the height of the vehicle's center of gravity; L represents the wheelbase of the vehicle's air suspension system; β represents the brake force distribution coefficient.

[0127] For rear-wheel drive vehicles, the braking efficiency E r2 It can be calculated by the following formula (4):

[0128]

[0129] Where a represents the distance from the center of gravity of the vehicle to the front axle of the vehicle air suspension system; Indicates the road adhesion coefficient; h g It represents the height of the vehicle's center of gravity; L represents the wheelbase of the vehicle's air suspension system; β represents the brake force distribution coefficient.

[0130] It can be seen from the above formulas (3) and (4) that when a front-wheel drive vehicle is in a state of rapid deceleration, in order to improve the braking efficiency of the vehicle, it is necessary to raise the rear axle of the air suspension system so that the center of gravity of the vehicle moves toward the front axle; and when a rear-wheel drive vehicle is in a state of rapid deceleration, in order to improve the braking efficiency of the vehicle, it is necessary to raise the front axle of the air suspension system so that the center of gravity of the vehicle moves toward the rear axle.

[0131] Therefore, in some embodiments, if the current driving state is a rapid deceleration state;

[0132] The step of determining the control information for the air spring of the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state, that is, the above step S1026, can be implemented as one of the following steps S1027 to S1028:

[0133] Step S1027, when the driving mode of the vehicle is front-wheel drive, based on the acceleration corresponding to the rapid deceleration state, determining to raise the air spring of the rear axle installed in the air suspension system of the vehicle to a fifth height;

[0134] Step S1028, when the driving mode of the vehicle is rear-wheel drive, based on the acceleration corresponding to the rapid acceleration state, determine to raise the air spring of the front axle of the air suspension system installed in the vehicle to a sixth height.

[0135] Here, the fifth height and the sixth height are heights determined for the front-wheel drive vehicle and the rear-wheel drive vehicle, respectively, based on the acceleration in the rapid deceleration state.

[0136] In some embodiments, the fifth height and the sixth height corresponding to different accelerations may be determined respectively by calibration.

[0137] In some embodiments, the fifth height and the sixth height corresponding to the front-wheel drive vehicle and the rear-wheel drive vehicle may be determined based on information such as the acceleration corresponding to the rapid deceleration state, the load of the vehicle, and the adhesion coefficient of the vehicle tires.

[0138] In the above embodiment, for a front-wheel drive vehicle in a state of rapid deceleration, the air spring installed on the rear axle of the air suspension system of the vehicle is raised to move the center of gravity of the vehicle forward, thereby improving the braking efficiency of the vehicle; for a rear-wheel drive vehicle in a state of rapid deceleration, the air spring installed on the front axle of the air suspension system of the vehicle is raised to move the center of gravity of the vehicle backward, thereby improving the braking efficiency of the vehicle. In this way, by further distinguishing the driving mode of the vehicle in a state of rapid deceleration, the control mode of the air spring of the vehicle can be more accurately determined, thereby better adjusting and compensating the center of gravity of the vehicle, optimizing the driving performance of the vehicle during rapid deceleration, and thus improving the driving confidence of the driver in a state of rapid deceleration.

[0139] At the same time, based on the above formulas (3) and (4), it can be seen that, in contrast to the direction of movement of the vehicle's center of gravity during rapid deceleration, when a front-wheel drive vehicle is in a rapid acceleration state, in order to reduce the braking efficiency, it is necessary to raise the front axle of the air suspension system so that the vehicle's center of gravity moves toward the rear axle; and when a rear-wheel drive vehicle is in a rapid acceleration state, in order to reduce the braking efficiency, it is necessary to raise the rear axle of the air suspension system so that the vehicle's center of gravity moves toward the front axle.

[0140] Therefore, in some embodiments, if the current driving state is a rapid acceleration state;

[0141] The step of determining the control information for the air spring of the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state, that is, the above step S1026, can be implemented as at least one of the following steps S1029 to S10210:

[0142] Step S1029, when the driving mode of the vehicle is front-wheel drive, based on the acceleration corresponding to the rapid acceleration state, determining to raise the air spring of the front axle of the air suspension system of the vehicle to a seventh height;

[0143] Step S10210, when the driving mode of the vehicle is rear-wheel drive, based on the acceleration corresponding to the rapid acceleration state, determine to raise the air spring of the rear axle of the air suspension system installed in the vehicle to an eighth height.

[0144] Here, the seventh height and the eighth height are heights determined for the front-wheel drive vehicle and the rear-wheel drive vehicle, respectively, based on the acceleration in the rapid acceleration state.

[0145] In some embodiments, the seventh height and the eighth height corresponding to different accelerations may be determined respectively by calibration.

[0146] In some embodiments, the seventh height and the eighth height corresponding to the front-wheel drive vehicle and the rear-wheel drive vehicle may be determined respectively based on information such as the acceleration corresponding to the rapid acceleration state, the load of the vehicle, and the adhesion coefficient of the vehicle tires.

[0147] In the above embodiment, for a front-wheel drive vehicle in a state of rapid acceleration, the air spring installed on the front axle of the air suspension system of the vehicle is raised to move the center of gravity of the vehicle backward, thereby improving the braking efficiency of the vehicle; for a rear-wheel drive vehicle in a state of rapid acceleration, the air spring installed on the rear axle of the air suspension system of the vehicle is raised to move the center of gravity of the vehicle forward, thereby improving the braking efficiency of the vehicle. In this way, by further distinguishing the driving mode of the vehicle in a state of rapid acceleration, the control mode of the air spring of the vehicle can be more accurately determined, thereby better adjusting and compensating the center of gravity of the vehicle, optimizing the driving performance of the vehicle during rapid acceleration, and thus improving the driving confidence of the driver in a state of rapid acceleration.

[0148] In some embodiments, after adjusting the height of the air spring installed on the front axle or the rear axle of the air suspension system of the vehicle based on the control information, that is, after the above step S103, the method further includes the following steps S104 to S106:

[0149] Step S104, obtaining updated state parameters of the vehicle;

[0150] Step S105, determining updated control information for the air spring of the vehicle when the updated state parameter satisfies a second preset condition;

[0151] Step S106: Based on the updated control information, the height of the front axle or rear axle air spring installed in the air suspension system of the vehicle is restored to the initial height.

[0152] Here, after the air springs of the vehicle are adjusted based on the current driving state of the vehicle, the state information of the vehicle continues to be acquired as an updated state parameter.

[0153] The second preset condition represents a vehicle driving state condition for exiting automatic adjustment of the vehicle air spring.

[0154] In some embodiments, the second preset condition includes that the gear data of the vehicle collected by the power controller is switched from a forward gear (e.g., D gear) to a non-forward gear (e.g., non-D gear). Here, when the vehicle switches from a forward gear to a non-forward gear, it indicates that the vehicle has exited a rapid acceleration, rapid deceleration, uphill or downhill state.

[0155] In some embodiments, when the current driving state of the vehicle is determined to be a sudden deceleration state based on step S102, the second preset condition includes that the updated acceleration is less than the first acceleration threshold and the duration exceeds the corresponding time threshold; or, when the current driving state of the vehicle is determined to be a sudden acceleration state based on step S102, the second preset condition includes that the updated acceleration is greater than the second acceleration threshold and the duration exceeds the corresponding time threshold.

[0156] In some embodiments, when the current driving state of the vehicle is determined to be an uphill state based on step S102, the second preset condition includes that the updated slope is less than the first slope threshold and the duration exceeds the corresponding time threshold; or, when the current driving state of the vehicle is determined to be a downhill state based on step S102, the second preset condition includes that the updated slope is less than the second slope threshold and the duration exceeds the corresponding time threshold.

[0157] In some embodiments, the second preset condition also includes that a control unit for realizing automatic adjustment of the height of the air spring, that is, a control unit for realizing an adaptive adjustment function, fails.

[0158] In some embodiments, the second preset condition further includes that an ignition signal of the vehicle is switched from an ignition (ON) state to an ignition (OFF) state.

[0159] In this way, in response to the updated state parameter satisfying the second preset condition, updated control information for the air spring is determined, and the height of the air spring installed on the front axle or rear axle of the air suspension system is restored to the initial height with the updated control information.

[0160] In the above embodiment, the state parameters of the vehicle are detected in real time, and the air spring is restored to the initial height when the updated state parameters meet the second preset condition, so as to adjust the control logic of the vehicle in combination with the real-time state parameters of the vehicle, thereby reducing the computing resource requirements of the vehicle control unit and reducing the mechanical wear of the vehicle.

[0161] In some embodiments, the vehicle air spring control method provided by the present invention further includes the following steps S107:

[0162] The current driving state, vehicle center of gravity position change information and air spring control information are displayed and output.

[0163] Here, the vehicle includes a display screen; wherein the display screen may be a touch display screen.

[0164] The display screen is used to display the current driving state of the output vehicle, for example, an uphill state, a downhill state, a rapid acceleration state or a rapid deceleration state.

[0165] The display screen is also used to display control information of the air springs of the output vehicle, such as the lifting information of the air springs installed on the front axle or rear axle of the air suspension, or the height recovery information of the air springs installed on the front axle or rear axle of the air suspension, etc.

[0166] By adjusting the height of the air spring, the center of gravity of the vehicle moves. Here, the display screen is also used to display the change information of the center of gravity of the vehicle.

[0167] In the above embodiment, by using a display screen to display the current driving status information of the vehicle and the control information of the air spring to the user, the user can intuitively feel the changes in the vehicle's driving performance as the driving status changes during driving, thereby improving the user's driving confidence.

[0168] Based on the foregoing embodiments, the present invention also provides a control device for a vehicle air spring. The units included in the device and the modules included in each unit can be implemented by a processor in the vehicle; of course, they can also be implemented by a specific logic circuit; during the implementation process, the processor can be an ECU, VMC, and the like.

[0169] Figure 2 A schematic diagram of the structure of a vehicle air spring control device provided by the present invention is shown in FIG. Figure 2 As shown, the control device 200 includes: a first determination module 210, a second determination module 220 and an adjustment module 230, wherein:

[0170] A first determination module 210, configured to determine a current driving state of the vehicle based on a state parameter of the vehicle;

[0171] A second determination module 220 is used to determine control information for the air spring of the vehicle based on the driving mode of the vehicle and the target driving state when the current state satisfies a first preset condition;

[0172] The adjustment module 230 is used to adjust the height of the air spring installed on the front axle or the rear axle of the air suspension system of the vehicle based on the control information.

[0173] In some embodiments, the first preset condition is that the current driving state is an uphill state or a downhill state, and the slope corresponding to the current driving state is greater than the corresponding slope threshold, and the duration corresponding to the current driving state is greater than the first time threshold;

[0174] The second determination module 220 is used to determine control information for the air spring of the vehicle based on the driving mode of the vehicle and the slope corresponding to the current driving state.

[0175] In some embodiments, the current driving state is an uphill state;

[0176] The second determining module 220 is configured to perform one of the following:

[0177] In a case where the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the uphill state, determining to raise an air spring installed on a rear axle of an air suspension system of the vehicle to a first height;

[0178] In a case where the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the uphill state, it is determined that an air spring installed on a front axle of an air suspension system of the vehicle is raised to a second height.

[0179] In some embodiments, the current driving state is a downhill state;

[0180] The second determining module 220 is configured to perform one of the following:

[0181] In a case where the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the downhill state, determining to raise the air spring of the front axle installed in the air suspension system of the vehicle to a third height;

[0182] In a case where the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the downhill state, it is determined that an air spring installed on a rear axle of an air suspension system of the vehicle is raised to a fourth height.

[0183] In some embodiments, the first preset condition is that the current driving state is a rapid acceleration state or a rapid deceleration state, and the absolute value of the acceleration corresponding to the current driving state is greater than the corresponding acceleration threshold, and the duration corresponding to the current driving state is greater than the second time threshold;

[0184] The second determination module 220 is used to determine control information for the air spring of the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state.

[0185] In some embodiments, the current driving state is a rapid deceleration state;

[0186] The second determining module 220 is configured to perform one of the following:

[0187] In a case where the driving mode of the vehicle is front-wheel drive, determining to raise an air spring of a rear axle of an air suspension system of the vehicle to a fifth height based on the acceleration corresponding to the rapid deceleration state;

[0188] When the driving mode of the vehicle is rear-wheel drive, it is determined to raise the air spring of the front axle installed in the air suspension system of the vehicle to a sixth height based on the acceleration corresponding to the rapid deceleration state.

[0189] In some embodiments, the current driving state is a rapid acceleration state;

[0190] The second determining module 220 is configured to perform one of the following:

[0191] In a case where the driving mode of the vehicle is front-wheel drive, based on the acceleration corresponding to the rapid acceleration state, determining to raise the air spring of the front axle of the air suspension system installed in the vehicle to a seventh height;

[0192] In a case where the driving mode of the vehicle is rear-wheel drive, based on the acceleration corresponding to the rapid acceleration state, it is determined that an air spring installed on a rear axle of an air suspension system of the vehicle is raised to an eighth height.

[0193] The description of the above device embodiment is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. In some embodiments, the functions or modules included in the device provided by the present invention can be used to execute the method described in the above method embodiment. For technical details not disclosed in the device embodiment of the present invention, please refer to the description of the method embodiment of the present invention for understanding.

[0194] Based on the above embodiments, the present invention also provides a control system for a vehicle air spring. Figure 3 As shown, the control system 300 of the vehicle air spring includes a plurality of sensors 310, a first controller 320 and a second controller 330; wherein,

[0195] The multiple sensors 310 are used to collect state parameters of the vehicle;

[0196] The first controller 320 is connected in communication with the plurality of sensors 310 to receive the state parameters; based on the state parameters, determines the current driving state of the vehicle; and when the current driving state satisfies a first preset condition, determines control information for the air spring based on the driving mode of the vehicle and the target driving state;

[0197] The second controller 330 receives the control information from the first controller 320 to adjust the front axle height or the rear axle height of the air spring based on the control information.

[0198] Here, the first controller 320 is used to implement an adaptive adjustment function, that is, the first controller 320 activates the adaptive adjustment function by judging whether the current driving state of the vehicle satisfies the first preset condition, so as to determine the control information for the air spring based on the driving mode and the current driving state of the vehicle under the adaptive adjustment function.

[0199] In some embodiments, the control system 300 further includes a display screen 340;

[0200] The display screen 340 is in communication with the first controller 320 to display height information of the air spring of the front axle or the rear axle of the air suspension system of the vehicle.

[0201] Here, the control system 300 provides a human-machine interaction interface through the display screen 340, so that the user can obtain the current driving state information of the vehicle, the position change information of the center of gravity of the vehicle, and the height information of the air spring installed on the front axle or rear axle of the air suspension system of the vehicle through the human-machine interaction interface. In this way, the current driving state information of the vehicle and the adjustment information of the air spring are displayed to the user through the display screen 340, so that the user can intuitively feel the changes of the driving performance of the vehicle with the driving state during driving, thereby improving the driving confidence of the user.

[0202] In some embodiments, the control system 300 further includes a bus 350 , so that the first controller 320 , the second controller 330 , and the display screen 340 are communicatively connected via the bus 350 .

[0203] In some embodiments, the bus 350 is a Controller Area Network (CAN) bus.

[0204] In some embodiments, the control system 300 further includes a signal acquisition unit corresponding to the plurality of sensors 310. For example, a wheel speed acquisition unit connected to a left front wheel speed sensor, a right front wheel speed sensor, a left rear wheel speed sensor, and a right rear wheel speed sensor installed on the wheels of the vehicle; another example, a vehicle inertial signal acquisition unit connected to an inertial sensor; another example, an IGN signal acquisition unit; and so on.

[0205] In some embodiments, the signal acquisition unit is connected to the corresponding sensor via a hard wire.

[0206] In some embodiments, the signal acquisition unit is connected to the first controller 320 via a bus 350 to send the acquired sensor information to the first controller 320 .

[0207] Next, combine Figure 4 , the implementation process of an application embodiment implemented by using the above-mentioned vehicle air spring control system is described in detail. Figure 4 As shown, this embodiment includes the following steps S401 to S406:

[0208] Step S401, using multiple sensors to collect state parameters of the vehicle; then, executing step S402;

[0209] Here, the vehicle's state parameters include the vehicle's wheel speed, lateral acceleration, longitudinal acceleration, gear position, accelerator pedal position, brake pedal position, engine real torque, and other data.

[0210] Step S402, based on the state parameters of the vehicle, the first controller determines the current driving state of the vehicle; thereafter, executing step S403;

[0211] Step S403, the first controller determines whether to activate the adaptive adjustment function; if so, execute step S404; if not, execute step S401;

[0212] Step S404, the display screen outputs the current driving state of the vehicle, the change information of the center of gravity position and the height information of the air spring; then, step S405 is executed;

[0213] Here, when the adaptive adjustment function is activated, the first controller determines the control information for the air spring based on the current driving state and driving mode of the vehicle; the first controller sends the control information to the second controller, so that the second controller adjusts the height of the air spring installed on the front axle or rear axle of the air suspension based on the control information, thereby achieving the purpose of adjusting the center of gravity position of the vehicle; thereafter, the current driving state of the vehicle, the center of gravity position change information and the height information of the air spring are displayed on the display screen of the vehicle.

[0214] Step S405, the first controller determines whether to exit the adaptive adjustment function; if so, execute step S406; if not, execute step S404;

[0215] Here, the first controller acquires and updates the state parameters of the vehicle in real time, and determines to exit the adaptive adjustment function when the updated state parameters meet the second preset condition; otherwise, the adaptive adjustment function continues to be executed.

[0216] Step S406, the display screen exits displaying the current driving state of the vehicle, the center of gravity position change information and the height information of the air spring.

[0217] Next, combine Figure 5, the implementation process of an embodiment of the first controller exiting the adaptive adjustment function according to the present invention is described in detail. Figure 5 As shown, this embodiment includes the following steps S501 to S506:

[0218] Step S501, the first controller activates the adaptive adjustment function and obtains the updated state parameters in real time; then, step S502 is executed;

[0219] Here, the updated state parameters include the vehicle's gear data, acceleration data, slope data, operating state data of a module in the first controller for performing an adaptive adjustment function, and an ignition signal, etc.

[0220] Step S502, determining whether the gear data is switched from the D gear to the non-D gear; if not, executing step S503; if yes, executing step S506;

[0221] Step S503, determining whether the updated state parameter does not meet the first preset condition; if not, executing step S504; if so, executing step S506;

[0222] Here, when the current driving state of the vehicle is a rapid acceleration state, if the updated acceleration is less than the first acceleration threshold and the duration exceeds the corresponding time threshold, it is determined that the first preset condition is not met;

[0223] When the current driving state of the vehicle is a sudden deceleration state, if the updated acceleration is greater than the second acceleration threshold and the duration exceeds the corresponding time threshold, it is determined that the first preset condition is not met;

[0224] When the current driving state of the vehicle is an uphill state, if the updated slope is less than the first slope threshold and the duration exceeds the corresponding time threshold, it is determined that the first preset condition is not met;

[0225] When it is determined that the current driving state of the vehicle is a downhill state, if the updated slope is less than the second slope threshold and the duration exceeds the corresponding time threshold, it is determined that the first preset condition is not met.

[0226] Step S504, determining whether the operating state of the adaptive adjustment function is abnormal; if not, executing step S505; if so, executing step S506;

[0227] Here, when the running state of the adaptive adjustment function is abnormal, the adaptive adjustment function is exited; otherwise, the adaptive adjustment function continues to be executed.

[0228] Step S505, determining whether the vehicle ignition signal is switched from the ON state to the OFF state; if not, executing step S502; if so, executing step S506;

[0229] Step S506, exit the adaptive adjustment function.

[0230] Next, combine Figure 6 , a control logic schematic diagram after the first controller according to the present invention activates the adaptive adjustment function is described in detail.

[0231] like Figure 6 As shown, multiple sensors installed on the vehicle are used to collect the vehicle's engine real torque signal 610, gear signal 620, accelerator pedal position signal 630, brake pedal position signal 640, wheel speed signal 650, longitudinal acceleration signal 660 and lateral acceleration signal 670 respectively.

[0232] like Figure 6 The control logic represented by the solid arrow in the middle determines whether the vehicle is currently in an uphill state or a downhill state based on the engine real torque signal 610, the gear position signal 620, the accelerator pedal position signal 630, the brake pedal position signal 640, the wheel speed signal 650, the longitudinal acceleration signal 660 and the lateral acceleration signal 670 at step S601; Figure 6 The control logic represented by the dashed arrow in the middle determines, at step S602 , whether the vehicle is currently in a rapid acceleration state or a rapid deceleration state based on the accelerator pedal position signal 630 , the brake pedal position signal 640 , the wheel speed signal 650 , and the lateral acceleration signal 670 .

[0233] At step S601, it can be determined that the vehicle is in two states, namely, state 680 and state 690; wherein, state 680 indicates that the vehicle is in an uphill state, and the uphill slope is greater than threshold A1, and the duration is greater than time threshold B1; state 690 indicates that the vehicle is in a downhill state, and the downhill slope is greater than threshold A2, and the duration is greater than time threshold B2.

[0234] When the vehicle is in state 680, continue to judge the driving mode of the vehicle; when the vehicle is a front-wheel drive vehicle, execute step S603 to raise the air spring installed on the rear axle, that is, raise the air spring installed on the rear axle of the vehicle's air suspension system; when the vehicle is a rear-wheel drive vehicle, execute step S604 to raise the air spring installed on the front axle, that is, raise the air spring installed on the front axle of the vehicle's air suspension system.

[0235] When it is determined that the vehicle is in state 690, continue to determine the driving mode of the vehicle; when the vehicle is a front-wheel drive vehicle, execute step S605 to raise the air spring installed on the front axle, that is, raise the air spring installed on the front axle of the vehicle's air suspension system; when the vehicle is a rear-wheel drive vehicle, execute step S606 to raise the air spring installed on the rear axle, that is, raise the air spring installed on the rear axle of the vehicle's air suspension system.

[0236] At step S602, it can be determined that the vehicle is in two states, namely, state 6110 and state 6120; wherein, state 6110 indicates that the vehicle is in a rapid acceleration state, and the acceleration is greater than the threshold X1, and the duration is greater than the time threshold Y1; state 6120 indicates that the vehicle is in a rapid deceleration state, and the acceleration is greater than the threshold X2, and the duration is greater than the time threshold Y2.

[0237] In state 6110, continue to judge the driving mode of the vehicle; if the vehicle is a front-wheel drive vehicle, execute step S607 to raise the air spring installed on the front axle, that is, raise the air spring installed on the front axle of the vehicle's air suspension system; if the vehicle is a rear-wheel drive vehicle, execute step S608 to raise the air spring installed on the rear axle, that is, raise the air spring installed on the rear axle of the vehicle's air suspension system.

[0238] In state 6120, continue to judge the driving mode of the vehicle; when the vehicle is a front-wheel drive vehicle, execute step S609 to raise the air spring installed on the rear axle, that is, raise the air spring installed on the rear axle of the vehicle's air suspension system; when the vehicle is a rear-wheel drive vehicle, execute step S6010 to raise the air spring installed on the front axle, that is, raise the air spring installed on the front axle of the vehicle's air suspension system.

[0239] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A method for controlling a vehicle air spring, comprising: Determining a current driving state of the vehicle based on a state parameter of the vehicle; When the current driving state satisfies a first preset condition, determining control information for an air spring of the vehicle based on a driving mode of the vehicle and the current driving state; Based on the control information, a height of an air spring installed at a front axle or a rear axle of an air suspension system of the vehicle is adjusted.

2. The method according to claim 1, characterized in that: The first preset condition is that the current driving state is an uphill state or a downhill state, and the slope corresponding to the current driving state is greater than the corresponding slope threshold, and the duration corresponding to the current driving state is greater than the first time threshold; The determining, based on the driving mode of the vehicle and the target driving state, control information for the air spring of the vehicle includes: Based on the driving mode of the vehicle and the slope corresponding to the current driving state, control information for the air spring of the vehicle is determined.

3. The method according to claim 2, characterized in that The current driving state is an uphill state; The determining, based on the driving mode of the vehicle and the slope corresponding to the current driving state, control information for the air spring of the vehicle comprises one of the following: In a case where the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the uphill state, determining to raise an air spring installed on a rear axle of an air suspension system of the vehicle to a first height; In a case where the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the uphill state, it is determined that an air spring installed on a front axle of an air suspension system of the vehicle is raised to a second height.

4. The method according to claim 2, characterized in that: The current driving state is a downhill state; The determining, based on the driving mode of the vehicle and the slope corresponding to the current driving state, control information for the air spring of the vehicle comprises one of the following: In a case where the driving mode of the vehicle is front-wheel drive, based on the slope corresponding to the downhill state, determining to raise the air spring of the front axle installed in the air suspension system of the vehicle to a third height; In a case where the driving mode of the vehicle is rear-wheel drive, based on the slope corresponding to the downhill state, it is determined that an air spring installed on a rear axle of an air suspension system of the vehicle is raised to a fourth height.

5. The method according to any one of claims 1 to 4, characterized in that The first preset condition is that the current driving state is a sudden acceleration state or a sudden deceleration state, and the absolute value of the acceleration corresponding to the current driving state is greater than the corresponding acceleration threshold, and the duration corresponding to the current driving state is greater than the second time threshold; The determining, based on the driving mode of the vehicle and the target driving state, control information for the air spring of the vehicle includes: Based on the driving mode of the vehicle and the acceleration corresponding to the current driving state, control information for the air spring of the vehicle is determined.

6. The method according to claim 5, characterized in that The current driving state is a rapid deceleration state; The determining of control information for the air spring of the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state includes one of the following: In a case where the driving mode of the vehicle is front-wheel drive, determining to raise an air spring of a rear axle of an air suspension system of the vehicle to a fifth height based on the acceleration corresponding to the rapid deceleration state; When the driving mode of the vehicle is rear-wheel drive, it is determined to raise the air spring of the front axle installed in the air suspension system of the vehicle to a sixth height based on the acceleration corresponding to the rapid deceleration state.

7. The method according to claim 5, characterized in that The current driving state is a rapid acceleration state; The determining of control information for the air spring of the vehicle based on the driving mode of the vehicle and the acceleration corresponding to the current driving state includes one of the following: In a case where the driving mode of the vehicle is front-wheel drive, based on the acceleration corresponding to the rapid acceleration state, determining to raise the air spring of the front axle of the air suspension system installed in the vehicle to a seventh height; In a case where the driving mode of the vehicle is rear-wheel drive, based on the acceleration corresponding to the rapid acceleration state, it is determined that an air spring installed on a rear axle of an air suspension system of the vehicle is raised to an eighth height.

8. The method according to any one of claims 1 to 4, after adjusting the height of the air spring installed at the front axle or the rear axle of the air suspension system of the vehicle based on the control information, the method further comprises: Obtaining updated state parameters of the vehicle; In a case where the updated state parameter satisfies a second preset condition, determining updated control information for an air spring of the vehicle; Based on the updated control information, the height of the front axle or rear axle air spring installed in the air suspension system of the vehicle is restored to the initial height.

9. A control device for a vehicle air spring, comprising: A first determination module, configured to determine a current driving state of the vehicle based on a state parameter of the vehicle; A second determination module, configured to determine control information for an air spring of the vehicle based on a driving mode of the vehicle and a target driving state when the current state satisfies a first preset condition; An adjustment module is used to adjust the height of an air spring installed on a front axle or a rear axle of an air suspension system of the vehicle based on the control information.

10. A control system for a vehicle air spring, comprising a plurality of sensors, a first controller and a second controller; wherein: The multiple sensors are used to collect status parameters of the vehicle; The first controller is communicatively connected with the plurality of sensors to receive the state parameters; Based on the state parameter, determining the current driving state of the vehicle; When the current driving state satisfies a first preset condition, determining control information for an air spring of the vehicle based on a driving mode of the vehicle and the current driving state; The second controller receives the control information from the first controller to adjust the height of an air spring installed at a front axle or a rear axle of an air suspension system of the vehicle based on the control information.

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