Vehicle control method and system

Abstract

The present application discloses a vehicle control method and system, which relates to the field of vehicle control technology. The vehicle control method includes: when the vehicle is on a highway or a good road surface, obtaining preset vehicle adjustment parameters; the above-mentioned good road surface is the road surface where the vehicle driving parameters meet the first preset condition; the vehicle adjustment parameters include the vehicle body height and the rear wing deployment angle; the above-mentioned vehicle is adjusted according to the above-mentioned preset vehicle adjustment parameters. The vehicle control system includes: an acquisition module, which is used to obtain preset vehicle adjustment parameters when the vehicle is on a highway or a good road surface; an adjustment module, which is used to adjust the vehicle according to the preset vehicle adjustment parameters. The vehicle control method and system of the present application can realize automatic matching of vehicle adjustment parameters and improve driving stability and economy.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a vehicle control method and system. Background Art

[0002] At present, when vehicles are driving at high speeds, wind resistance has a greater impact on the fuel economy of the vehicle due to its high speed. At the same time, high speeds encountered in turning or emergency braking conditions have a greater impact on the stability of the vehicle and the driving comfort of the driver.

[0003] In the related technology, by receiving the ETC signal sent to the vehicle by the ETC (Electronic Toll Collection) device on the highway, the information of the vehicle entering the highway can be obtained without adding additional on-board equipment and remote servers, so as to accurately provide the identification result of the vehicle entering the highway, so that the vehicle can turn on the high-speed driving mode function of ADAS based on judgment.

[0004] However, simple detection through ETC can only detect the status on or off the highway, and it is too dependent on ETC. If ETC fails, the function cannot be used, and it may even cause misuse of ADAS high-speed driving mode, resulting in poor vehicle stability and economy. In addition, it is impossible to detect non-highway roads with good road conditions, nor can the entire vehicle be controlled. Summary of the invention

[0005] In view of one of the defects existing in the prior art, the purpose of the present application is to provide a vehicle control method and system to solve the problem of low vehicle driving stability and economy in the related technology.

[0006] The first aspect of the present application provides a vehicle control method, which comprises the steps of:

[0007] When the vehicle is on a highway or a good road, obtaining preset vehicle adjustment parameters; the above-mentioned good road is a road where the vehicle driving parameters meet the first preset condition; the vehicle adjustment parameters include vehicle height and rear wing deployment angle;

[0008] The vehicle is adjusted according to the preset vehicle adjustment parameters.

[0009] In some embodiments, when the vehicle is on a highway, the preset vehicle adjustment parameters include a minimum vehicle height and a maximum rear wing deployment angle;

[0010] When the vehicle is on a good road surface, the preset speed range in which the current vehicle speed is located is obtained, and each preset speed range corresponds to a vehicle height and a rear wing deployment angle; the above-mentioned preset vehicle adjustment parameters include the vehicle height and rear wing deployment angle corresponding to the preset speed range.

[0011] In some embodiments, the vehicle adjustment parameters also include the vehicle shock absorber damping force;

[0012] When the vehicle is on a highway or good road, the vehicle shock absorber damping force is controlled to a preset value.

[0013] In some embodiments, after controlling the damping force of the vehicle shock absorber to a preset value, the method further includes:

[0014] If the vehicle is in a sudden acceleration condition, the damping force of the rear axle is controlled to increase to a maximum value and is restored when the vehicle speed stabilizes; the sudden acceleration condition is that the average acceleration within the fourth preset time is greater than the acceleration threshold;

[0015] If the vehicle is in a sudden deceleration condition, the damping force of the front axle is controlled to increase to a maximum value and is restored when the vehicle speed stabilizes; the sudden deceleration condition is that the average absolute value of the deceleration within the fourth preset time is greater than the deceleration threshold;

[0016] If the vehicle turns, the difference in damping force between the inside and outside of the vehicle is controlled to a preset difference, and the damping force on the outside of the vehicle is greater than the damping force on the inside of the vehicle, and is restored after turning.

[0017] In some embodiments, the first preset condition includes:

[0018] The duration of the vehicle speed being greater than the first preset speed is greater than the first preset time;

[0019] The duration during which the Z-direction acceleration of each wheel of the above-mentioned vehicle is less than the preset acceleration is greater than the first preset time.

[0020] In some embodiments, after adjusting the vehicle according to the preset vehicle adjustment parameters, the method further includes:

[0021] Determine whether the vehicle exits the expressway or the good road; when the vehicle driving parameter meets any second preset condition, determine that the vehicle exits the good road;

[0022] If so, the vehicle adjustment parameters matching the current driving mode are obtained and used to adjust the above vehicle.

[0023] The second precondition mentioned above includes:

[0024] The duration of the vehicle speed being less than the second preset speed is greater than the second preset time;

[0025] The duration during which the Z-direction acceleration of any wheel of the above-mentioned vehicle is greater than the preset acceleration is greater than the second preset time.

[0026] In some embodiments, when the vehicle is on a highway or a good road, the method further includes:

[0027] Determine whether the active suspension integrated controller ASC system, the continuously adjustable damping shock absorber CDC system, and the active rear wing ACS system are all fault-free. If so, determine whether the vehicle is on a highway or a good road.

[0028] In some embodiments, determining whether the vehicle is on a highway or a good road specifically includes:

[0029] When the vehicle is equipped with the high-precision map and high-precision positioning HDM&HDP of the intelligent driving ADAS system, the above HDM&HDP is used to determine whether the vehicle is on a highway. If not, it is determined whether the vehicle is on a good road.

[0030] When the vehicle does not have HDM&HDP but has an onboard navigation CNC, if the CNC recognizes that the vehicle is on a highway and the duration of the vehicle speed being greater than the first preset speed is greater than the third preset time, then it is determined that the vehicle is on a highway, and the third preset time is less than the first preset time; if the CNC recognizes that the vehicle is not on a highway, then it is determined whether the vehicle is on a good road surface;

[0031] When the vehicle does not have HDM&HDP and CNC, it is directly determined whether the vehicle is on a good road.

[0032] In some embodiments, when the vehicle is on a highway or a good road, the method further includes:

[0033] Make sure the vehicle posture adjustment function switch is turned on.

[0034] A second aspect of the present application provides a vehicle control system, comprising:

[0035] An acquisition module, which is used to acquire preset vehicle adjustment parameters when the vehicle is on a highway or a good road surface; the above-mentioned good road surface is a road surface where the vehicle driving parameters meet the first preset condition; the vehicle adjustment parameters include vehicle height and tail wing deployment angle;

[0036] An adjustment module is used to adjust the vehicle according to the preset vehicle adjustment parameters.

[0037] The beneficial effects of the technical solution provided by this application include:

[0038] The vehicle control method and system of the present application obtains preset vehicle adjustment parameters when the vehicle is on a highway or a good road surface; the above-mentioned good road surface is the road surface where the vehicle driving parameters meet the first preset condition, and the vehicle adjustment parameters include the vehicle body height and the rear wing deployment angle; and then adjusts the vehicle body height and the rear wing deployment angle of the above-mentioned vehicle according to the above-mentioned preset vehicle adjustment parameters. Therefore, the present application can realize automatic matching of vehicle adjustment parameters and improve driving stability and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 This is a first flow chart of the vehicle control method in the embodiment of the present application;

[0041] Figure 2 This is a second flow chart of the vehicle control method in the embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] The embodiment of the present application provides a vehicle control method, which can solve the problems of low vehicle driving stability and economy in the related art.

[0044] like Figure 1 As shown, the vehicle control method of this embodiment includes the steps of:

[0045] S1. When the vehicle is on a highway or a good road, obtain preset vehicle adjustment parameters; the above-mentioned good road is the road on which the vehicle driving parameters meet the first preset condition, that is, when the vehicle driving parameters meet the first preset condition, it is judged that the vehicle is on a good road; the vehicle adjustment parameters include vehicle body height and rear wing deployment angle.

[0046] S2. Adjust the vehicle according to the preset vehicle adjustment parameters.

[0047] The vehicle control method of this embodiment obtains preset vehicle adjustment parameters when the vehicle is on a highway or a good road surface; the above-mentioned good road surface is the road surface where the vehicle driving parameters meet the first preset condition, and the vehicle adjustment parameters include the vehicle height and the rear wing deployment angle; and then adjusts the vehicle height and the rear wing deployment angle of the above-mentioned vehicle according to the above-mentioned preset vehicle adjustment parameters. Therefore, the present application can realize automatic matching of vehicle adjustment parameters and improve driving stability and economy.

[0048] Specifically, highway conditions require a low center of gravity and low wind resistance. Since vehicles need to take into account both passability, their center of gravity is usually not very low. In addition, although vehicles equipped with tail wings can improve grip at high speeds, offset some lift, and ensure vehicle driving stability, under low-speed conditions, the deployment of the tail wings will increase wind resistance.

[0049] Based on the above embodiments, in this embodiment, when the vehicle is on a highway, the preset vehicle adjustment parameters include the minimum vehicle body height and the maximum rear wing deployment angle, which can satisfy the low center of gravity height under high altitude conditions and effectively reduce wind resistance.

[0050] Among them, the minimum vehicle height is different for different models, and the specific minimum vehicle height can be set according to the actual vehicle.

[0051] When the vehicle is on a good road surface, the preset speed range in which the current vehicle speed is located is obtained, and each preset speed range corresponds to a vehicle height and a rear wing deployment angle; the above-mentioned preset vehicle adjustment parameters include the vehicle height and rear wing deployment angle corresponding to the preset speed range.

[0052] Optionally, the preset speed interval includes a first preset speed interval, a second preset speed interval and a third preset speed interval. The first preset speed interval is less than 100KPH, the second preset speed interval is 100KPH-120KPH, and the third preset speed interval is a vehicle speed greater than 120KPH. After determining the preset speed interval in which the current vehicle speed is located, the vehicle can be controlled according to the vehicle height and tail wing deployment angle corresponding to the preset speed interval.

[0053] Preferably, the vehicle height before entering the expressway or good road is x, the vehicle height corresponding to the first preset speed interval is x-30, that is, the vehicle height is reduced by 30mm; the vehicle height corresponding to the second preset speed interval is x-40, that is, the vehicle height is reduced by 40mm; the vehicle height corresponding to the third preset speed interval is x-50, that is, the vehicle height is reduced by 50mm. In this embodiment, the minimum vehicle height is x-50.

[0054] On the basis of the above embodiment, in this embodiment, the vehicle adjustment parameter also includes the damping force of the vehicle shock absorber.

[0055] When the vehicle is on a highway or a good road, the damping force of the vehicle shock absorber is controlled to a preset value. The preset vehicle adjustment parameter at this time also includes the preset value. In this embodiment, the preset value is less than the maximum damping force. Optionally, the preset value may be slightly less than the maximum damping force.

[0056] In this embodiment, when the damping force of the vehicle shock absorber is increased to a preset value, the roll or pitch of the vehicle body can be effectively suppressed during high-speed cornering or rapid acceleration and deceleration conditions, thereby further improving the driving stability of the vehicle.

[0057] Furthermore, after controlling the damping force of the vehicle shock absorber to a preset value, the following steps are also included:

[0058] If the vehicle is in a rapid acceleration condition, the damping force of the rear axle is controlled to increase to a maximum value and is restored when the vehicle speed stabilizes, that is, the damping force of the rear axle is restored to a preset value; the rapid acceleration condition is that the average acceleration within the fourth preset time is greater than the acceleration threshold.

[0059] If the vehicle is in a sudden deceleration condition, the damping force of the front axle is controlled to increase to a maximum value and is restored when the vehicle speed stabilizes, that is, the damping force of the front axle is restored to a preset value; the above-mentioned sudden deceleration condition is that the average absolute value of the deceleration within the fourth preset time is greater than the deceleration threshold.

[0060] Optionally, the fourth preset time is 1-3s, and the acceleration threshold and the deceleration threshold can be set according to actual needs. The above-mentioned vehicle speed stability means that the vehicle maintains a constant speed, or the acceleration or deceleration of the vehicle is less than a calibration value.

[0061] If the vehicle turns, the difference in damping force between the inside and outside of the vehicle is controlled to a preset difference, and the damping force on the outside of the vehicle is greater than the damping force on the inside of the vehicle, and is restored after turning, that is, the damping force of the wheel is restored to the preset value.

[0062] Preferably, the outer side damping of the vehicle may be increased. In other embodiments, the inner side damping of the vehicle may be reduced, or the inner side damping of the vehicle may be reduced while the outer side damping of the vehicle is increased.

[0063] In this embodiment, corresponding further control can be performed for rapid acceleration, deceleration and cornering conditions to offset the vehicle body tilt problem caused by axle load transfer.

[0064] Preferably, the above-mentioned vehicle adjustment parameters include vehicle body height, rear wing deployment angle, and vehicle shock absorber damping force.

[0065] When the vehicle is on a highway or good road, the above vehicle can be adjusted according to the corresponding vehicle body height, rear wing deployment angle, and vehicle shock absorber damping force.

[0066] In this embodiment, the first preset condition includes:

[0067] The duration of the vehicle speed being greater than the first preset speed is greater than the first preset time;

[0068] The duration of the Z-direction acceleration of each wheel of the vehicle being less than the preset acceleration is greater than a first preset time. The Z-direction is vertically upward from the ground.

[0069] That is, when the vehicle speed is greater than the first preset speed for a duration greater than the first preset time, and the Z-direction acceleration of each wheel of the vehicle is less than the preset acceleration for a duration greater than the first preset time, it is determined that the vehicle has entered a good road surface.

[0070] Preferably, the first preset vehicle speed is 80KPH, the first preset time is 30s, and the preset acceleration is a calibration value, wherein the calibration value can be determined by calibration based on an actual vehicle.

[0071] On the basis of the above embodiment, in this embodiment, after the above vehicle is adjusted according to the above preset vehicle adjustment parameters, the following steps are further included:

[0072] Determine whether the vehicle exits the expressway or the good road; when the vehicle driving parameters meet any one of the second preset conditions, determine that the vehicle exits the good road.

[0073] If so, that is, it is determined that the vehicle exits the highway or good road, the vehicle adjustment parameters matching the current driving mode are obtained and used to adjust the above vehicle, or the driving mode and vehicle adjustment parameters before the vehicle enters the highway or good road are restored. Otherwise, the vehicle adjustment parameters currently on the highway or good road are maintained.

[0074] Generally speaking, when a vehicle exits a highway or a good road, the current driving mode is the same as the driving mode before the vehicle entered the highway or the good road, and the vehicle adjustment parameters matching the two are also the same.

[0075] Furthermore, the second preset condition includes:

[0076] The duration of the vehicle speed being less than the second preset speed is greater than the second preset time;

[0077] The duration during which the Z-direction acceleration of any wheel of the above-mentioned vehicle is greater than the preset acceleration is greater than the second preset time.

[0078] That is, when the vehicle speed is less than the second preset speed for a duration greater than the second preset time, or the Z-direction acceleration of any wheel of the vehicle is greater than the preset acceleration for a duration greater than the second preset time, it is determined that the vehicle has exited the good road surface.

[0079] Preferably, the second preset vehicle speed is 60KPH, and the second preset time is 10s.

[0080] Based on the above embodiment, in this embodiment, before the vehicle is on a highway or a good road, the following steps are further included:

[0081] Determine whether the ASC (Active Suspension Controller) system, the CDC (Continuous Damping Control) system, and the ACS (ACTIVE CarSpoiler) system are all fault-free. If so, determine whether the vehicle is on a highway or a good road.

[0082] That is, only after confirming that the ASC system, CDC system, and ACS system are all in good condition will it be determined whether the vehicle is on a highway or a good road.

[0083] Preferably, determining whether the vehicle is on a highway or a good road specifically includes:

[0084] When a vehicle is equipped with HDM&HDP (HD maps and HD positioning) of the intelligent driving ADAS (Advanced Driving Assistance System), the HDM&HDP is used to determine whether the vehicle is on a highway. If not, it is determined whether the vehicle is on a good road.

[0085] Specifically, since the positioning of HDM&HDP can reach within 0.5 meters, the positioning accuracy is high. Therefore, when HDM&HDP determines that the vehicle enters the highway through high-precision maps and positioning, it will immediately feed back the highway signal to the ADAS controller, and the ADAS controller will then feed back the highway signal to the ASC system, CDC system, and ACS system, so that the ASC system, CDC system, and ACS system can perform corresponding control. When HDM&HDP determines that the vehicle has not entered the highway, it determines whether the vehicle is on a good road based on whether the vehicle driving parameters meet the first preset condition.

[0086] When the vehicle does not have HDM&HDP, but has a car navigation controller (CNC), if the CNC recognizes that the vehicle is on a highway, and the duration of the vehicle speed being greater than the first preset speed is greater than the third preset time, then the vehicle is judged to be on a highway, and the third preset time is less than the first preset time; if the CNC recognizes that the vehicle is not on a highway, then it is judged whether the vehicle is on a good road. Optionally, the third preset time may also be greater than the second preset time.

[0087] Specifically, since the CNC usually has an accuracy error of more than 15 meters, the CNC positioning accuracy is low, and it is necessary to jointly determine whether the vehicle is on the highway in conjunction with the vehicle driving parameters.

[0088] In this embodiment, the third preset time is 15s. That is, when the CNC identifies that the vehicle is on a highway and the duration of the vehicle speed greater than 80KPH is greater than 15s, it can be determined that the vehicle has entered the highway, and then the highway signal is fed back to the ASC system, the CDC system, and the ACS system. When the CNC determines that the vehicle is not on a highway, it determines whether the vehicle is on a good road according to whether the vehicle driving parameters meet the first preset condition.

[0089] When the vehicle does not have HDM&HDP and CNC, it is not determined whether the vehicle is on a highway, but whether the vehicle is on a good road is determined directly based on whether the vehicle driving parameters meet the first preset condition.

[0090] Optionally, when the vehicle is on a highway or a good road, it also includes:

[0091] Make sure the vehicle posture adjustment function switch is turned on.

[0092] In this embodiment, the control functions of the ASC system, CDC system, and ACS system for improving high-speed driving stability and economy are turned on by default, that is, the default vehicle posture adjustment function switch is turned on. If the driver needs to turn off this function, he needs to find the vehicle posture adjustment function switch in the IVI (In-Vehicle Infotainment) to turn it off. When the vehicle posture adjustment function switch is turned off, the IVI will also pop up a window to remind the driver to turn off the function, which will be detrimental to the stability and economy of the vehicle at high speed.

[0093] In this embodiment, after the ASC system, CDC system and ACS system are initialized, it is necessary to first determine whether there are any faults in themselves. For example, a height sensor / air pump fault will cause the air spring height to be unadjustable, an acceleration sensor / solenoid valve fault will cause the damping to be unadjustable, and a motor fault / stuck fault will cause the tail wing to be unadjustable.

[0094] When the ASC system, CDC system, and ACS system are all in good condition, and when the vehicle is equipped with the HDM&HDP of the ADAS system, ADAS determines through HDM&HDP whether the road the vehicle is traveling on is on a highway. If not, it determines whether the vehicle is on a good road based on a first preset condition. If it is met, the good road signal is fed back to the ADAS controller, and then fed back to the ASC, CDC, and ACS systems.

[0095] If the vehicle is not equipped with HDM&HDP, the configured CNC will determine whether the vehicle's driving trajectory is on the highway.

[0096] Since the positioning accuracy of HDM&HDP and CNC is quite different, HDM&HDP can reach within 0.5 meters, while CNC usually has an accuracy error of more than 15 meters, so the highway signal feedback strategies determined by the two are also different. After HDM&HDP enters the highway through high-precision maps and positioning, it will immediately feedback the highway signal to the ADAS controller, and then to the ASC, CDC, and ACS systems. After CNC locates the highway, it usually needs to cooperate with the vehicle speed greater than 80KPH and continuously for more than 15s to determine that the vehicle has entered the highway, and then further feedback to the ASC, CDC, and ACS systems.

[0097] If some vehicles have neither the on-board navigation CNC nor the HDM&HDP of the ADAS system, the driving road condition cannot be determined by positioning. In this case, ASC needs to make a judgment according to the first preset condition. If both of the following two conditions are met, it is determined that the vehicle is in good driving condition:

[0098] Condition 1: The ASC system receives the vehicle speed signal fed back by the ESC (Electronic Stability Controller) and maintains it above 80KPH for more than 30 seconds;

[0099] Condition 2: The four-wheel Z-axis accelerations fed back by the ASC system to the CDC system are all less than the preset acceleration a for more than 30 seconds.

[0100] After the ASC system determines that the first preset condition is met, it will synchronize the road signal to the CDC system and the ACS system.

[0101] When the ASC system, CDC system, and ACS system obtain highway signals or good road signals, they control the vehicle body height, CDC damping, and tail wing posture based on the preset vehicle adjustment parameters to ensure that the vehicle can travel in a better posture.

[0102] Specifically, when the vehicle enters the highway, the ASC system controls the air springs of the four wheels to deflate so that the vehicle body height is reduced by -50mm, and the vehicle enters the highway mode, so that the longitudinal windward area of ​​the vehicle can be greatly reduced to improve fuel economy. At the same time, the center of mass height of the vehicle will also decrease accordingly, which greatly improves the stability of high-speed driving. CDC controls the damping of the shock absorbers of the four wheels to the preset value, so as to effectively suppress the roll or pitch of the vehicle body when turning on the highway or in the condition of rapid acceleration and deceleration. After that, if the vehicle accelerates suddenly, the damping of the rear axle is controlled to increase. If the vehicle decelerates suddenly, the damping of the front axle is controlled to increase. If the vehicle turns, the difference between the inner and outer damping is controlled to offset the problem of body tilt caused by axle load transfer. The ACS system controls the maximum angle of the active rear wing to increase the downforce of the vehicle, improve the grip of the tires, and make the vehicle better and more stable when driving at high speeds.

[0103] In this embodiment, when HDM&HDP determines to exit the highway through high-precision mapping and positioning, it will immediately feed back the non-highway signal to the ADAS controller, and then to the ASC, CDC, and ACS systems.

[0104] After the CNC locates the exit from the expressway, the vehicle speed must be less than the second preset speed for a duration greater than the third preset time before the vehicle is judged to have exited the expressway. That is, after the CNC locates the exit from the expressway, the vehicle speed must be less than 60KPH and last for more than 15 seconds before the vehicle is judged to have exited the expressway, and then further feedback is given to the ASC, CDC, and ACS systems.

[0105] The confirmation method for determining whether the vehicle has exited a good road is similar to the process of entering a good road. ASC needs to make a determination according to the second preset condition. If any of the following conditions is met, the vehicle is determined to be in a non-good road condition:

[0106] Condition 1: The ASC system receives the vehicle speed signal fed back by the ESC and maintains it below 60KPH for more than 10 seconds;

[0107] Condition 2: Any one of the four-wheel Z-axis accelerations fed back by the CDC system to the ASC system is greater than the preset acceleration a and lasts for more than 10 seconds.

[0108] After the ASC system determines that any second preset condition is met, it determines that the vehicle is on a non-good road surface and synchronizes the road surface signal to the CDC system and the ACS system.

[0109] When the ASC system, CDC system, and ACS system obtain the signal to exit the highway or the signal to exit a good road surface, they obtain the vehicle adjustment parameters that match the current driving mode to control the vehicle height, CDC damping, and rear wing posture to ensure that the vehicle can travel in a better posture.

[0110] Specifically, the ASC system controls the inflation of the air springs of the four wheels to restore the vehicle body height to a height that matches the current driving mode, ensuring the vehicle's driving passability; the CDC system controls the shock absorber damping of the four wheels to match the current driving mode, ensuring good vibration filtering capability and providing good comfort; the ACS system controls the closure of the active rear wing to reduce vehicle driving resistance and reduce fuel consumption.

[0111] In this embodiment, the ASC system, CDC system, and ACS system control the vehicle body lifting, shock absorber damping changes, and tail wing switch status, and all of them will synchronize the signals to the IVI for display to facilitate driver observation.

[0112] Optionally, the vehicle control method is performed by the ASC system, CDC system, and ACS system interacting with ADAS or CNC to identify, judge, and execute according to software that embodies the control strategy.

[0113] like Figure 2 As shown, the vehicle control method of this embodiment specifically includes the following steps:

[0114] A1. Initialization of ASC system, CDC system and ACS system;

[0115] A2. Check if there are no faults in the ASC system, CDC system and ACS system. If yes, go to A3; otherwise, go to A2.

[0116] A3. Is the vehicle on the highway? If so, turn to A5; otherwise, turn to A4.

[0117] A4. Is the vehicle on a good road? If so, turn to A5; otherwise, turn to A3.

[0118] A5. Obtain preset vehicle adjustment parameters, adjust the vehicle accordingly, and display the adjustment information through IVI;

[0119] A6. Have you exited the highway or good road? If so, turn to A7; otherwise, turn to A6.

[0120] A7. Obtain vehicle adjustment parameters matching the current driving mode, adjust the vehicle accordingly, and display the adjustment information through the IVI. Preferably, at this time, turn to A3 to determine again whether the vehicle is on a highway.

[0121] The method of this embodiment, according to the HDM&HDP or CNC positioning and the ASC system, automatically lowers the center of gravity, reduces the windward area, reduces wind resistance and ensures good stability when the conditions for lowering the center of gravity are met; controls the rear wing to actively unfold or close, so as to increase stability by high-speed unfolding and improve economy by low-speed folding; actively adjusts the damping of the shock absorber to ensure driving stability; in addition, in addition to detecting highways, it will also simultaneously detect non-highway roads but with good road conditions based on the vehicle speed and the Z-axis acceleration sensor (or the change in the height value of the air spring height sensor), and actively control the vehicle body height, shock absorber damping force and rear wing based on the judgment conclusion.

[0122] The present application also provides an embodiment of a vehicle control system, which includes an acquisition module and an adjustment module.

[0123] When the vehicle is on a highway or a good road, the acquisition module is used to acquire preset vehicle adjustment parameters; the good road is the road where the vehicle driving parameters meet the first preset condition. The vehicle adjustment parameters include the vehicle height and the tail wing deployment angle.

[0124] The adjustment module is used to adjust the vehicle according to the preset vehicle adjustment parameters.

[0125] Preferably, the vehicle adjustment parameters also include the vehicle shock absorber damping force.

[0126] Optionally, the acquisition module includes a first sub-acquisition module, a second sub-acquisition module, and a third sub-acquisition module; the adjustment module includes a first sub-adjustment module, a second sub-adjustment module, and a third sub-adjustment module.

[0127] The first sub-acquisition module and the first sub-adjustment module are arranged in the ASC system, the second sub-acquisition module and the second sub-adjustment module are arranged in the CDC system, and the third sub-acquisition module and the third sub-adjustment module are arranged in the ACS system.

[0128] The vehicle control system of this embodiment can implement the above-mentioned vehicle control methods, and comprehensively control the vehicle body height, damping and rear wing according to the road conditions, which not only ensures good driving stability, but also improves economy and driving comfort.

[0129] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0130] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0131] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A vehicle control method, characterized in that: It includes the steps of: When the vehicle is on a highway or a good road, a preset vehicle adjustment parameter is obtained; the good road is a road on which the vehicle driving parameters meet the first preset condition; Vehicle adjustment parameters include vehicle height and rear wing deployment angle; adjusting the vehicle according to the preset vehicle adjustment parameters; The first preset condition includes: The duration of the vehicle speed being greater than the first preset speed being greater than the first preset time; The duration of the Z-direction acceleration of each wheel of the vehicle being less than the preset acceleration is greater than a first preset time; The vehicle adjustment parameters also include the vehicle shock absorber damping force; When the vehicle is on a highway or good road, the vehicle shock absorber damping force is controlled to a preset value; After controlling the damping force of the vehicle shock absorber to a preset value, it also includes: If the vehicle is in a sudden acceleration condition, the damping force of the rear axle is controlled to increase to a maximum value and is restored when the vehicle speed stabilizes; the sudden acceleration condition is that the average acceleration within the fourth preset time is greater than the acceleration threshold; If the vehicle is in a sudden deceleration condition, the damping force of the front axle is controlled to increase to a maximum value and to be restored when the vehicle speed is stable; the sudden deceleration condition is that the average absolute value of the deceleration within the fourth preset time is greater than the deceleration threshold; If the vehicle turns, the difference in damping force between the inside and outside of the vehicle is controlled to a preset difference, and the damping force on the outside of the vehicle is greater than the damping force on the inside of the vehicle, and is restored after turning.

2. The vehicle control method according to claim 1, characterized in that: When the vehicle is on a highway, the preset vehicle adjustment parameters include the minimum vehicle height and the maximum rear wing deployment angle; When the vehicle is on a good road surface, the preset speed range in which the current vehicle speed is located is obtained, and each preset speed range corresponds to a vehicle height and a rear wing deployment angle; the preset vehicle adjustment parameters include the vehicle height and rear wing deployment angle corresponding to the preset speed range.

3. The vehicle control method according to claim 1, characterized in that: After the vehicle is adjusted according to the preset vehicle adjustment parameters, the method further includes: Determine whether the vehicle exits the expressway or the good road; when the vehicle driving parameter meets any second preset condition, determine that the vehicle exits the good road; If so, obtaining vehicle adjustment parameters that match the current driving mode, and adjusting the vehicle accordingly; The second preset condition includes: The duration that the vehicle speed is less than the second preset vehicle speed is greater than the second preset time; The duration during which the Z-direction acceleration of any wheel of the vehicle is greater than the preset acceleration is greater than a second preset time.

4. The vehicle control method according to claim 1, characterized in that: When the vehicle is on a highway or good road, it also includes: Determine whether the active suspension integrated controller ASC system, the continuously adjustable damping shock absorber CDC system, and the active rear wing ACS system are all fault-free. If so, determine whether the vehicle is on a highway or a good road.

5. The vehicle control method according to claim 4, characterized in that: Determine whether the vehicle is on a highway or a good road, including: When the vehicle is equipped with the high-precision map and high-precision positioning HDM&HDP of the intelligent driving ADAS system, the high-precision map and high-precision positioning HDM&HDP are used to determine whether the vehicle is on a highway. If not, it is determined whether the vehicle is on a good road. When the vehicle does not have a high-precision map and high-precision positioning HDM&HDP, but has an on-board navigation CNC, if the on-board navigation CNC recognizes that the vehicle is on a highway, and the duration of the vehicle speed being greater than the first preset speed is greater than the third preset time, then it is determined that the vehicle is on a highway, and the third preset time is less than the first preset time; if the on-board navigation CNC recognizes that the vehicle is not on a highway, then it is determined whether the vehicle is on a good road surface; When the vehicle does not have high-precision maps, high-precision positioning HDM&HDP and on-board navigation CNC, it can directly determine whether the vehicle is on a good road.

6. The vehicle control method according to claim 1, characterized in that: When the vehicle is on a highway or good road, it also includes: Make sure the vehicle posture adjustment function switch is turned on.

7. A vehicle control system, characterized in that: It includes: An acquisition module, which is used to acquire preset vehicle adjustment parameters when the vehicle is on a highway or a good road; The good road surface is the road surface on which the vehicle driving parameters meet the first preset condition; the vehicle adjustment parameters include the vehicle height and the rear wing deployment angle; An adjustment module, used for adjusting the vehicle according to the preset vehicle adjustment parameters; The vehicle adjustment parameters include the vehicle shock absorber damping force; When the vehicle is on a highway or good road, the vehicle shock absorber damping force is controlled to a preset value; After controlling the damping force of the vehicle shock absorber to a preset value, it also includes: If the vehicle is in a sudden acceleration condition, the damping force of the rear axle is controlled to increase to a maximum value and is restored when the vehicle speed stabilizes; the sudden acceleration condition is that the average acceleration within the fourth preset time is greater than the acceleration threshold; If the vehicle is in a sudden deceleration condition, the damping force of the front axle is controlled to increase to a maximum value and to be restored when the vehicle speed is stable; the sudden deceleration condition is that the average absolute value of the deceleration within the fourth preset time is greater than the deceleration threshold; If the vehicle turns, the difference between the inner and outer damping forces of the vehicle is controlled to a preset difference, and the outer damping force of the vehicle is greater than the inner damping force of the vehicle, and the vehicle is restored after turning; The first preset condition includes: The duration of the vehicle speed being greater than the first preset speed being greater than the first preset time; The duration during which the Z-direction acceleration of each wheel of the vehicle is less than the preset acceleration is greater than a first preset time.

Images