Vehicle aerodynamic resistance control method and device, vehicle and storage medium

Abstract

The embodiment of the invention provides a vehicle aerodynamic resistance control method and device, a vehicle and a storage medium, the vehicle comprises air supply equipment and an empennage which are arranged at the tail, and the method comprises the steps that the vehicle speed and the tail static pressure of the vehicle are obtained, and the braking state of the vehicle is determined; judging whether the vehicle meets an aerodynamic resistance reduction condition or not according to the vehicle speed and the tail static pressure of the vehicle; according to the vehicle speed and the vehicle braking state, whether the vehicle meets the aerodynamic resistance increasing condition or not is judged; if the vehicle meets the aerodynamic resistance reduction control condition, air supply equipment and an empennage of the vehicle are adjusted to reduce the aerodynamic resistance of the vehicle; if the vehicle meets the control condition for increasing the aerodynamic resistance, the aerodynamic resistance of the vehicle is increased, so that the aerodynamic resistance of the vehicle can be controlled in real time by controlling the air supply equipment and the empennage mounted at the tail part of the vehicle, and the aerodynamic resistance is reduced when the vehicle runs at a high speed so as to improve the endurance; and when the vehicle is braked, the pneumatic resistance is increased to shorten the braking distance.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle control, and particularly to a method and device for controlling the aerodynamic drag of a vehicle, a vehicle, and a storage medium. Background Art

[0002] With the continuous development of new energy vehicles, users' requirements for the vehicle's cruising range are also increasing. As the vehicle speed increases, most of the vehicle's energy is used to overcome air resistance, thus affecting the vehicle's cruising range. At the same time, when the vehicle brakes at high speed, air resistance is an important factor affecting the vehicle's braking distance. In related technologies, most vehicles are equipped with passive drag reduction devices, but the ability of passive drag reduction devices to reduce air resistance is limited, and the optimization effect on vehicle energy consumption is poor; moreover, the methods for controlling aerodynamic drag in related technologies are too single, mainly focusing on reducing aerodynamic drag, and cannot meet the vehicle's need to increase aerodynamic drag. How to flexibly and reliably control the aerodynamic drag of a vehicle is a problem to be solved at present. Summary of the Invention

[0003] In order to solve the above problems, embodiments of the present application disclose a method and device for controlling the aerodynamic drag of a vehicle, a vehicle, and a storage medium.

[0004] In a first aspect, embodiments of the present application provide a method for controlling the aerodynamic drag of a vehicle, where the vehicle includes a blowing device and a rear wing provided at the rear, and the method includes:

[0005] Obtain the vehicle speed and the static pressure at the rear of the vehicle, and determine the braking state of the vehicle;

[0006] According to the vehicle speed and the static pressure at the rear of the vehicle, determine whether the vehicle meets the condition for reducing aerodynamic drag; and according to the vehicle speed and the braking state of the vehicle, determine whether the vehicle meets the condition for increasing aerodynamic drag;

[0007] If the vehicle meets the condition for controlling the reduction of aerodynamic drag, adjust the blowing device and the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle;

[0008] If the vehicle meets the condition for controlling the increase of aerodynamic drag, adjust the blowing device and the rear wing of the vehicle to increase the aerodynamic drag of the vehicle.

[0009] Optionally, the determining whether the vehicle meets the condition for reducing aerodynamic drag according to the vehicle speed and the static pressure at the rear of the vehicle includes:

[0010] When the vehicle speed is greater than a first preset vehicle speed, determine whether the vehicle speed matches the static pressure at the rear of the vehicle;

[0011] If the vehicle speed of the vehicle does not match the static pressure at the rear of the vehicle, it is confirmed that the vehicle meets the conditions for reducing aerodynamic drag control.

[0012] Optionally, determining whether the vehicle speed of the vehicle matches the static pressure at the rear of the vehicle includes:

[0013] In the case where the ratio of the vehicle speed of the vehicle to the static pressure at the rear of the vehicle exceeds a preset range, it is determined that the vehicle speed of the vehicle does not match the static pressure at the rear of the vehicle.

[0014] Optionally, determining whether the vehicle meets the conditions for increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle includes:

[0015] In the case where the braking state of the vehicle is emergency braking and the vehicle speed is greater than a second preset vehicle speed, it is determined that the vehicle meets the conditions for increasing aerodynamic drag.

[0016] Optionally, determining the braking state of the vehicle includes:

[0017] Obtain the braking cylinder pressure of the vehicle;

[0018] In the case where the braking cylinder pressure of the vehicle is greater than a preset pressure value, it is determined that the braking state of the vehicle is emergency braking.

[0019] Optionally, adjusting the air supply device and the tail wing of the vehicle to reduce the aerodynamic drag of the vehicle includes:

[0020] Controlling the air supply device of the vehicle to supply air to the rear of the vehicle and adjusting the angle of the tail wing of the vehicle to reduce the aerodynamic drag of the vehicle.

[0021] Optionally, adjusting the air supply device and the tail wing of the vehicle to increase the aerodynamic drag of the vehicle includes:

[0022] Controlling the air supply device of the vehicle to supply air to the front of the vehicle and adjusting the angle of the tail wing of the vehicle to be perpendicular to the vehicle to increase the aerodynamic drag of the vehicle.

[0023] In a second aspect, an embodiment of the present application provides a vehicle aerodynamic drag control device. The vehicle includes an air supply device and a tail wing provided at the rear. The device includes:

[0024] A vehicle information acquisition module, configured to acquire the vehicle speed and the static pressure at the rear of the vehicle, and determine the braking state of the vehicle;

[0025] A vehicle information judgment module, configured to judge whether the vehicle meets the condition for reducing aerodynamic drag according to the vehicle speed and the static pressure at the vehicle's tail; and judge whether the vehicle meets the condition for increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle;

[0026] An aerodynamic drag reduction module, configured to adjust the air supply device and the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle if the vehicle meets the condition for controlling the reduction of aerodynamic drag;

[0027] An aerodynamic drag increase module, configured to adjust the air supply device and the rear wing of the vehicle to increase the aerodynamic drag of the vehicle if the vehicle meets the condition for controlling the increase of aerodynamic drag.

[0028] Optionally, the vehicle information judgment module includes:

[0029] A static pressure at the tail judgment sub-module, configured to judge whether the vehicle speed and the static pressure at the vehicle's tail match when the vehicle speed is greater than a first preset vehicle speed;

[0030] A reduction condition determination sub-module, configured to confirm that the vehicle meets the condition for controlling the reduction of aerodynamic drag if the vehicle speed and the static pressure at the vehicle's tail do not match.

[0031] Optionally, the static pressure at the tail judgment sub-module includes:

[0032] A static pressure at the tail judgment unit, configured to determine that the vehicle speed and the static pressure at the vehicle's tail do not match when the ratio of the vehicle speed to the static pressure at the vehicle's tail exceeds a preset range.

[0033] Optionally, the vehicle information judgment module includes:

[0034] An increase condition determination sub-module, configured to determine that the vehicle meets the condition for increasing aerodynamic drag when the braking state of the vehicle is emergency braking and the vehicle speed is greater than a second preset vehicle speed.

[0035] Optionally, the vehicle information acquisition module includes:

[0036] A brake cylinder pressure acquisition sub-module, configured to acquire the brake cylinder pressure of the vehicle;

[0037] A braking state determination sub-module, configured to determine that the braking state of the vehicle is emergency braking when the brake cylinder pressure of the vehicle is greater than a preset pressure value.

[0038] Optionally, the aerodynamic drag reduction module includes:

[0039] An aerodynamic drag reduction sub-module for controlling the air supply device of the vehicle to supply air to the rear of the vehicle and adjusting the angle of the vehicle's rear wing to reduce the aerodynamic drag of the vehicle.

[0040] Optionally, the aerodynamic drag increase module includes:

[0041] An aerodynamic drag increase sub-module for controlling the air supply device of the vehicle to supply air to the front of the vehicle and adjusting the angle of the vehicle's rear wing to be perpendicular to the vehicle to increase the aerodynamic drag of the vehicle.

[0042] In a third aspect, the present application discloses a vehicle, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the processor executes the computer program, the steps of the above-mentioned vehicle aerodynamic drag control method are implemented.

[0043] In a fourth aspect, the present application discloses a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned vehicle aerodynamic drag control method are implemented.

[0044] The embodiments of the present application have the following advantages:

[0045] The vehicle of the embodiments of the present application includes an air supply device and a rear wing provided at the rear. The embodiments of the present application can obtain the vehicle speed and the static pressure at the rear of the vehicle, and determine the braking state of the vehicle; according to the vehicle speed and the static pressure at the rear of the vehicle, determine whether the vehicle meets the aerodynamic drag reduction condition, so as to accurately reduce the aerodynamic drag of the vehicle and improve the vehicle's cruising range; and according to the vehicle speed and the braking state of the vehicle, determine whether the vehicle meets the aerodynamic drag increase condition, so as to timely increase the aerodynamic drag of the vehicle, shorten the vehicle's emergency braking distance, and improve the vehicle's safety; if the vehicle meets the aerodynamic drag reduction control condition, adjust the vehicle's air supply device and rear wing to reduce the aerodynamic drag of the vehicle; if the vehicle meets the aerodynamic drag increase control condition, adjust the vehicle's air supply device and rear wing to increase the aerodynamic drag of the vehicle, so that the aerodynamic drag of the vehicle can be controlled in real time by controlling the air supply device and rear wing installed at the rear of the vehicle. Through the air supply device and rear wing, the embodiments of the present application can integrate the aerodynamic drag reduction method and the aerodynamic drag increase method into the vehicle at the same time, realizing reducing the aerodynamic drag to improve the cruising range in the state of high-speed driving of the vehicle, and increasing the aerodynamic drag to shorten the braking distance in the state of braking of the vehicle, thereby improving the overall performance of the vehicle. Description of the Drawings

[0046] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0047] Figure 1 is a flowchart of the steps of a vehicle aerodynamic drag control method according to an embodiment of the present application;

[0048] Figure 2 is a flowchart of the steps of another vehicle aerodynamic drag control method according to an embodiment of the present application;

[0049] Figure 3 is a logic diagram of a vehicle aerodynamic drag control method according to an embodiment of the present application;

[0050] Figure 4 is a structural block diagram of a vehicle aerodynamic drag control device according to an embodiment of the present application. Detailed implementation manners

[0051] In the related art, when the vehicle speed is greater than 65 km / h, about 55% of the vehicle's energy is used to overcome air resistance. When the vehicle speed is greater than 90 km / h, about 70% of the vehicle's energy is used to overcome air resistance. Therefore, reducing the air resistance suffered by the vehicle during driving can significantly improve the vehicle's cruising range. When the vehicle brakes at high speed, the frictional resistance and air resistance are the main factors affecting the braking distance of the vehicle. Increasing the air resistance suffered by the vehicle during driving can shorten the braking distance of the vehicle.

[0052] The present application proposes a vehicle aerodynamic drag control method, aiming to flexibly and reliably control the aerodynamic drag of the vehicle. To achieve this goal, the embodiments of the present application can achieve the effect of real-time controlling the vehicle's aerodynamic drag by controlling the air supply device and the rear wing installed at the rear of the vehicle. Thus, the method of reducing aerodynamic drag and the method of increasing aerodynamic drag are integrated into the vehicle at the same time, realizing reducing aerodynamic drag to improve cruising range in the state of high-speed driving of the vehicle, and increasing aerodynamic drag to shorten the braking distance in the state of vehicle braking, improving the overall performance of the vehicle.

[0053] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will further describe the present application in detail with reference to the accompanying drawings and specific implementation manners.

[0054] Referring to Figure 1 , a flowchart of the steps of a vehicle aerodynamic drag control method according to an embodiment of the present application is shown. The vehicle includes an air supply device and a rear wing provided at the rear. The method may specifically include the following steps:

[0055] Step 101: Obtain the vehicle speed and the static pressure at the rear of the vehicle, and determine the braking state of the vehicle.

[0056] In the embodiment of the present application, the vehicle aerodynamic drag control method can be executed by the vehicle control system. The control system may include a vehicle speed sensor, a brake cylinder pressure sensor, and a static pressure sensor. The control system can obtain the vehicle speed through the vehicle speed sensor, obtain the static pressure at the rear of the vehicle through the static pressure sensor, and determine the braking state of the vehicle through the brake cylinder pressure sensor. Among them, the braking state of the vehicle may include emergency braking and normal braking.

[0057] Step 102: Determine whether the vehicle meets the condition for reducing aerodynamic drag according to the vehicle speed and the static pressure at the rear of the vehicle; and determine whether the vehicle meets the condition for increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle.

[0058] In the embodiment of the present application, the control system can determine the driving state of the vehicle according to the vehicle speed. The driving state includes high-speed driving, so as to determine whether the vehicle meets the condition for reducing aerodynamic drag. The control system can also determine whether the vehicle is performing emergency braking or normal braking according to the vehicle speed and the braking state of the vehicle, and determine whether the vehicle meets the condition for increasing aerodynamic drag. Exemplarily, when the vehicle is driving at a high speed, the control system can consider that the vehicle meets the condition for reducing aerodynamic drag; when the vehicle is performing emergency braking and has not stopped, the control system can consider that the vehicle meets the condition for increasing aerodynamic drag.

[0059] Step 103: If the vehicle meets the condition for reducing aerodynamic drag control, adjust the air supply device and the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle.

[0060] In the embodiment of the present application, when the vehicle meets the condition for reducing aerodynamic drag control, the control system can determine the energy consumption of the vehicle according to the static pressure at the rear of the vehicle, and then adjust the air supply device and the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle, so as to reasonably reduce the aerodynamic drag of the vehicle, reduce the energy consumption of the vehicle, and improve the cruising range of the vehicle. Among them, the air supply device can be a fan or a jet device, and the number of air supply devices can be one or more.

[0061] Step 104: If the vehicle meets the condition for increasing aerodynamic drag control, adjust the air supply device and the rear wing of the vehicle to increase the aerodynamic drag of the vehicle.

[0062] In the embodiment of the present application, when the vehicle meets the condition for increasing aerodynamic drag control, the control system can adjust the air supply device and the rear wing of the vehicle to increase the aerodynamic drag of the vehicle, so as to timely increase the aerodynamic drag of the vehicle, shorten the emergency braking distance of the vehicle, and improve the safety of the vehicle.

[0063] The vehicle according to the embodiment of the present application includes a air supply device and a rear wing provided at the rear. The embodiment of the present application can obtain the vehicle speed and the static pressure at the rear of the vehicle, and determine the braking state of the vehicle; according to the vehicle speed and the static pressure at the rear of the vehicle, determine whether the vehicle meets the condition for reducing aerodynamic drag, so as to accurately reduce the aerodynamic drag of the vehicle and improve the vehicle's cruising range; and according to the vehicle speed and the braking state of the vehicle, determine whether the vehicle meets the condition for increasing aerodynamic drag, so as to timely increase the aerodynamic drag of the vehicle, shorten the emergency braking distance of the vehicle, and improve the safety of the vehicle; if the vehicle meets the condition for reducing aerodynamic drag control, adjust the air supply device and the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle; if the vehicle meets the condition for increasing aerodynamic drag control, adjust the air supply device and the rear wing of the vehicle to increase the aerodynamic drag of the vehicle, so that the aerodynamic drag of the vehicle can be controlled in real time by controlling the air supply device and the rear wing installed at the rear of the vehicle. Through the air supply device and the rear wing, the embodiment of the present application can integrate the method for reducing aerodynamic drag and the method for increasing aerodynamic drag onto the vehicle at the same time, realizing reducing aerodynamic drag to improve cruising range in the state of high-speed driving of the vehicle, and increasing aerodynamic drag to shorten the braking distance in the state of braking of the vehicle, thus improving the overall performance of the vehicle.

[0064] Referring to Figure 2 , a step flow chart of another vehicle aerodynamic drag control method according to the embodiment of the present application is shown. The vehicle includes a air supply device and a rear wing provided at the rear. The method may specifically include the following steps:

[0065] Step 201, obtain the vehicle speed and the static pressure at the rear of the vehicle, and determine the braking state of the vehicle;

[0066] In one embodiment, the step of determining the braking state of the vehicle may further include the following sub-steps:

[0067] Sub-step S11, obtain the braking cylinder pressure of the vehicle;

[0068] Sub-step S12, when the braking cylinder pressure of the vehicle is greater than a preset pressure value, determine that the braking state of the vehicle is emergency braking.

[0069] In an embodiment of the present application, the vehicle aerodynamic drag control method can be executed by the vehicle control system, which may include a vehicle speed sensor, a brake cylinder pressure sensor, and a static pressure sensor. The control system can obtain the vehicle speed through the vehicle speed sensor, obtain the static pressure at the vehicle's tail through the static pressure sensor, and determine the braking state of the vehicle through the brake cylinder pressure sensor. The braking state of the vehicle can include emergency braking and normal braking. Specifically, the control system can obtain the brake cylinder pressure of the vehicle through the brake cylinder pressure sensor and determine the braking state of the vehicle according to the brake cylinder pressure of the vehicle. For example, when the brake cylinder pressure of the vehicle is greater than a preset pressure value, it is determined that the braking state of the vehicle is emergency braking. Among them, the preset pressure value can be one hundred atmospheres, and those skilled in the art can determine the preset pressure value as other appropriate values according to the idea of the present application, and the present application does not limit this.

[0070] Step 202, determine whether the vehicle meets the condition for reducing aerodynamic drag according to the vehicle speed and the static pressure at the vehicle's tail; and determine whether the vehicle meets the condition for increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle;

[0071] In an embodiment of the present application, the control system can determine whether the vehicle meets the condition for reducing aerodynamic drag according to the vehicle speed and the static pressure at the vehicle's tail. Specifically, the control system can determine that the vehicle meets the condition for reducing aerodynamic drag when the vehicle speed is greater than a first preset vehicle speed. According to related technologies, when the vehicle speed is greater than 65 km / h, about 55% of the vehicle's energy is used to overcome air resistance. Therefore, in an embodiment of the present application, the first preset vehicle speed can be set to 60 km / h, and those skilled in the art can set the first preset vehicle speed to other appropriate values according to the idea of the present application, and the present application does not limit this.

[0072] In one embodiment, the step of determining whether the vehicle meets the condition for reducing aerodynamic drag according to the vehicle speed and the static pressure at the vehicle's tail may further include the following sub-steps:

[0073] Sub-step S21, when the vehicle speed is greater than the first preset vehicle speed, determine whether the vehicle speed matches the static pressure at the vehicle's tail;

[0074] Among them, determining whether the vehicle speed matches the static pressure at the vehicle's tail includes: when the ratio of the vehicle speed to the static pressure at the vehicle's tail exceeds a preset range, it is determined that the vehicle speed does not match the static pressure at the vehicle's tail.

[0075] Sub-step S22, if the vehicle speed does not match the static pressure at the vehicle's tail, confirm that the vehicle meets the condition for reducing aerodynamic drag control.

[0076] In an embodiment of the present application, the control system can determine the energy consumption of the vehicle according to the static pressure at the rear of the vehicle. Specifically, when the vehicle speed is greater than the first preset vehicle speed, the control system determines whether the vehicle speed matches the static pressure at the rear of the vehicle. When the vehicle speed does not match the static pressure at the rear of the vehicle, that is, when the ratio of the vehicle speed to the static pressure at the rear of the vehicle exceeds the preset range, it is confirmed that the vehicle meets the condition for reducing aerodynamic drag control.

[0077] Among them, to determine whether the vehicle speed matches the static pressure at the rear, the principles of aerodynamics and actual testing means can be combined. Use aerodynamic software (such as CFD, computational fluid dynamics) to simulate the airflow distribution of the vehicle at different vehicle speeds, especially the static pressure distribution at the rear. Through simulation, it can be analyzed whether the static pressure at the rear changes proportionally with the vehicle speed. According to Bernoulli's equation, the relationship between static pressure and vehicle speed is:

[0078] P static pressure + 1 / 2(ρv2) = a

[0079] Among them, P static pressure is the static pressure at the rear, ρ is the air density, v is the vehicle speed, and a is a constant. In the present application, when the ratio of the vehicle speed to the static pressure at the rear of the vehicle, that is, the constant a exceeds the preset range, it is determined that the vehicle speed does not match the static pressure at the rear of the vehicle, and then it is determined that the vehicle meets the condition for reducing aerodynamic drag.

[0080] In one embodiment, the step of determining whether the vehicle meets the condition for increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle may further include the following sub-steps:

[0081] Sub-step S31, when the braking state of the vehicle is emergency braking and the vehicle speed is greater than the second preset vehicle speed, it is determined that the vehicle meets the condition for increasing aerodynamic drag.

[0082] In an embodiment of the present application, the control system can also determine whether the vehicle meets the condition for increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle, and determine whether the vehicle is in emergency braking or normal braking. Specifically, when the braking state of the vehicle is emergency braking and the vehicle speed is greater than the second preset vehicle speed, it is determined that the vehicle meets the condition for increasing aerodynamic drag. Among them, the second preset vehicle speed can be 50 km / h, that is, during the emergency braking process of the vehicle, the aerodynamic drag of the vehicle is increased until the vehicle stops. Those skilled in the art can set the second preset vehicle speed to other appropriate values according to the idea of the present application, and the present application does not limit this.

[0083] Step 203, if the vehicle meets the condition for reducing aerodynamic drag control, adjust the air supply device and the rear wing of the vehicle, control the air supply device of the vehicle to supply air to the rear of the vehicle, and adjust the angle of the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle;

[0084] In an embodiment of the present application, the control system may, when the vehicle speed is greater than a first preset vehicle speed, determine whether the vehicle speed matches the static pressure at the rear of the vehicle. When the vehicle speed does not match the static pressure at the rear of the vehicle, that is, when the ratio of the vehicle speed to the static pressure at the rear of the vehicle exceeds a preset range, it is determined that the vehicle meets the condition for reducing aerodynamic drag control. When the vehicle meets the condition for reducing aerodynamic drag control, the control system may adjust the air supply device and the rear wing of the vehicle, control the air supply device of the vehicle to supply air to the rear of the vehicle, and adjust the angle of the rear wing of the vehicle, so as to reduce the aerodynamic drag of the vehicle, thereby reasonably reducing the aerodynamic drag of the vehicle, reducing the energy consumption of the vehicle, and improving the cruising range of the vehicle.

[0085] Step 204, if the vehicle meets the condition for increasing aerodynamic drag control, adjust the air supply device and the rear wing of the vehicle, control the air supply device of the vehicle to supply air to the front of the vehicle, and adjust the angle of the rear wing of the vehicle to be perpendicular to the vehicle, so as to increase the aerodynamic drag of the vehicle.

[0086] In an embodiment of the present application, when the vehicle meets the condition for increasing aerodynamic drag control, the control system may control the air supply device of the vehicle to supply air to the front of the vehicle, and adjust the angle of the rear wing of the vehicle to be perpendicular to the vehicle, so as to increase the aerodynamic drag of the vehicle, thereby being able to timely increase the aerodynamic drag of the vehicle, shorten the emergency braking distance of the vehicle, and improve the safety of the vehicle.

[0087] The embodiment of the present application can obtain the vehicle speed and the static pressure at the rear of the vehicle, and determine the braking state of the vehicle; according to the vehicle speed and the static pressure at the rear of the vehicle, determine whether the vehicle meets the condition for reducing aerodynamic drag, so as to accurately reduce the aerodynamic drag of the vehicle and improve the cruising range of the vehicle; and according to the vehicle speed and the braking state of the vehicle, determine whether the vehicle meets the condition for increasing aerodynamic drag, so as to timely increase the aerodynamic drag of the vehicle, shorten the emergency braking distance of the vehicle, and improve the safety of the vehicle; if the vehicle meets the condition for reducing aerodynamic drag control, control the air supply device of the vehicle to supply air to the rear of the vehicle, and adjust the angle of the rear wing of the vehicle, so as to reduce the aerodynamic drag of the vehicle; if the vehicle meets the condition for increasing aerodynamic drag control, control the air supply device of the vehicle to supply air to the front of the vehicle, and adjust the angle of the rear wing of the vehicle to be perpendicular to the vehicle, so as to increase the aerodynamic drag of the vehicle, thereby being able to achieve the effect of real-time control of the aerodynamic drag of the vehicle by controlling the air supply device and the rear wing installed at the rear of the vehicle. Through the air supply device and the rear wing, the embodiment of the present application can integrate the method for reducing aerodynamic drag and the method for increasing aerodynamic drag into the vehicle at the same time, realizing reducing aerodynamic drag to improve cruising range in the state of high-speed driving of the vehicle, and increasing aerodynamic drag to shorten the braking distance in the state of braking of the vehicle, thus improving the overall performance of the vehicle.

[0088] Refer to Figure 3, which shows the logic diagram of a vehicle aerodynamic drag control method provided by an embodiment of the present application. To enable those skilled in the art to better understand the embodiments of the present application, the following will be described through Figure 3 to illustrate the embodiments of the present application:

[0089] Step 301, obtain the vehicle speed.

[0090] Step 302, determine whether the vehicle speed is greater than a first preset vehicle speed.

[0091] Step 303, when the vehicle speed is greater than the first preset vehicle speed, reduce the aerodynamic drag of the vehicle.

[0092] Exemplarily, the control system can first determine whether the vehicle speed is greater than 60 km / h. If the vehicle speed is less than or equal to 60 km / h, the control strategy for reducing the vehicle aerodynamic drag is not activated, and the vehicle speed signal is continuously detected in a loop; when the vehicle speed is greater than 60 km / h, the strategy for reducing the aerodynamic drag can be executed.

[0093] Step 304, obtain the static pressure at the rear of the vehicle.

[0094] Step 305, determine whether the vehicle speed matches the static pressure at the rear of the vehicle.

[0095] Step 306, when the vehicle speed does not match the static pressure at the rear of the vehicle, adjust the air supply device and the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle.

[0096] Exemplarily, the control system can determine whether the static pressure at the rear matches the current vehicle speed. If the vehicle speed does not match the static pressure at the rear of the vehicle, the air supply device of the vehicle is controlled to supply air to the rear of the vehicle according to the real-time vehicle speed and static pressure, and the angle of the rear wing of the vehicle is adjusted to an appropriate angle to reduce the aerodynamic drag of the vehicle; if the vehicle speed matches the static pressure at the rear of the vehicle, the control voltage of the fan motor is maintained to keep its rotational speed unchanged and the current angle of the rear wing is maintained.

[0097] Step 307, determine the braking state of the vehicle.

[0098] Step 308, when the braking state of the vehicle is emergency braking, adjust the air supply device and the rear wing of the vehicle to increase the aerodynamic drag of the vehicle.

[0099] Step 309, determine whether the vehicle speed has dropped to 0.

[0100] Exemplarily, during the execution of the pneumatic drag reduction strategy, the control system can determine the braking state of the vehicle through the brake cylinder pressure sensor. In the case where the braking state of the vehicle is an emergency brake, it serves as an interruption signal to execute the pneumatic drag increase strategy, adjusting the air supply device and the rear wing of the vehicle to increase the pneumatic drag of the vehicle until the speed of the vehicle drops to 0. Specifically, the emergency brake signal serves as the interruption signal for the pneumatic drag reduction strategy. If the vehicle speed is greater than 50 km / h and the emergency brake signal is detected, the control system can abort the ongoing pneumatic drag reduction strategy (if the pneumatic drag reduction strategy is activated), execute the pneumatic drag increase strategy, then adjust the motor controlling the tail fan to rotate fully in reverse so that the fan blows forward, adjust the angle of the rear wing so that its angle is perpendicular to the vehicle body, increase the pneumatic drag received by the vehicle, and shorten the braking distance. Read the braking state of the vehicle, determine whether the emergency brake signal is continuously maintained. If not, end the pneumatic drag increase control strategy and return to the main program; if so, loop to read the vehicle speed signal and determine whether the vehicle speed is 0 km / h. If so, end the pneumatic drag increase control strategy and return to the main program. This control method can respond immediately to the emergency brake signal, while the control idea of the related technology more often detects the emergency brake signal in each cycle. Although the time of each cycle is not long, for emergency braking, the faster the pneumatic drag increase control strategy responds, the better.

[0101] In the embodiment of the present application, by means of the air supply device and the rear wing installed at the rear of the vehicle, the static pressure at the rear is changed, so that the static pressure at the rear of the vehicle matches the real-time vehicle speed, achieving the effect of real-time control of the pneumatic drag of the vehicle; through the forward and reverse rotation of the air supply device and the angle of the rear wing, the pneumatic drag reduction strategy and the pneumatic drag increase strategy for the vehicle are integrated into a set of devices. In the embodiment of the present application, through the air supply device and the rear wing, it is possible to reduce the pneumatic drag to improve the endurance in the state of the vehicle traveling at high speed, and increase the pneumatic drag to shorten the braking distance in the state of the vehicle braking, improving the overall performance of the vehicle.

[0102] The methods for reducing the pneumatic drag of the related technology mainly focus on changing the exterior design of the vehicle. Due to reasons such as cost and response time, the need to increase the pneumatic drag during emergency braking has not been implemented in mass-produced vehicles. However, the present application relies on the air supply device and the rear wing, and realizes the control strategy for increasing the pneumatic drag of the vehicle through the reverse rotation of the motor, which can well solve problems such as cost and response time limit.

[0103] It should be noted that for the method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present application are not limited by the described action sequences, because according to the embodiments of the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential for the embodiments of the present application.

[0104] Refer to Figure 4 which shows a structural block diagram of a vehicle aerodynamic drag control device provided in an embodiment of the present application. The vehicle includes a blowing device and a rear wing provided at the tail. The device may specifically include the following modules:

[0105] A vehicle information acquisition module 401, configured to acquire the vehicle speed and the static pressure at the tail of the vehicle, and determine the braking state of the vehicle;

[0106] A vehicle information judgment module 402, configured to judge whether the vehicle meets the condition for reducing aerodynamic drag according to the vehicle speed and the static pressure at the tail of the vehicle; and judge whether the vehicle meets the condition for increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle;

[0107] An aerodynamic drag reduction module 403, configured to adjust the blowing device and the rear wing of the vehicle to reduce the aerodynamic drag of the vehicle if the vehicle meets the condition for controlling the reduction of aerodynamic drag;

[0108] An aerodynamic drag increase module 404, configured to adjust the blowing device and the rear wing of the vehicle to increase the aerodynamic drag of the vehicle if the vehicle meets the condition for controlling the increase of aerodynamic drag.

[0109] In the embodiment of the present application, the vehicle information judgment module 402 includes:

[0110] A static pressure judgment sub-module at the tail, configured to judge whether the vehicle speed and the static pressure at the tail of the vehicle match when the vehicle speed is greater than a first preset vehicle speed;

[0111] A reduction condition determination sub-module, configured to confirm that the vehicle meets the condition for controlling the reduction of aerodynamic drag if the vehicle speed and the static pressure at the tail of the vehicle do not match.

[0112] In the embodiment of the present application, the static pressure judgment sub-module at the tail includes:

[0113] A static pressure judgment unit at the tail, configured to determine that the vehicle speed and the static pressure at the tail of the vehicle do not match when the ratio of the vehicle speed to the static pressure at the tail of the vehicle exceeds a preset range.

[0114] In the embodiment of the present application, the vehicle information judgment module 402 further includes:

[0115] An increase condition determination sub-module, configured to determine that the vehicle meets the condition for increasing aerodynamic drag when the braking state of the vehicle is an emergency brake and the vehicle speed is greater than a second preset vehicle speed.

[0116] In the embodiment of the present application, the vehicle information acquisition module 401 includes:

[0117] A braking cylinder pressure acquisition sub-module, configured to acquire the braking cylinder pressure of a vehicle;

[0118] A braking state determination sub-module, configured to determine that the braking state of the vehicle is an emergency braking when the braking cylinder pressure of the vehicle is greater than a preset pressure value.

[0119] In an embodiment of the present application, the pneumatic drag reduction module 403 includes:

[0120] A pneumatic drag reduction sub-module, configured to control a blowing device of the vehicle to blow air to the rear of the vehicle and adjust the angle of a rear wing of the vehicle, so as to reduce the pneumatic drag of the vehicle.

[0121] In an embodiment of the present application, the pneumatic drag increase module 404 includes:

[0122] A pneumatic drag increase sub-module, configured to control the blowing device of the vehicle to blow air to the front of the vehicle and adjust the angle of the rear wing to be perpendicular to the vehicle, so as to increase the pneumatic drag of the vehicle.

[0123] In the embodiment of the present application, by installing a blowing device and a rear wing at the rear of the vehicle, the static pressure at the rear is changed, so that the static pressure at the rear of the vehicle matches the real-time vehicle speed, achieving the effect of real-time control of the pneumatic drag of the vehicle; through the forward and reverse rotations of the blowing device and the angle of the rear wing, the strategy of reducing the pneumatic drag of the vehicle and the strategy of increasing the pneumatic drag of the vehicle are integrated into a set of devices. In the embodiment of the present application, through the blowing device and the rear wing, it is possible to reduce the pneumatic drag to improve the endurance when the vehicle is traveling at a high speed, and increase the pneumatic drag to shorten the braking distance when the vehicle is braking, thereby improving the overall performance of the vehicle.

[0124] For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the related parts, reference may be made to the partial description of the method embodiment.

[0125] An embodiment of the present application further provides a vehicle, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the processor executes the computer program, the steps of the above-mentioned vehicle pneumatic drag control method are implemented.

[0126] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned vehicle pneumatic drag control method are implemented.

[0127] Each embodiment in this specification is described in a progressive manner, and the key point of each embodiment is to illustrate the differences from other embodiments. For the same and similar parts among the embodiments, reference may be made to each other.

[0128] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, apparatuses, or computer program products. Therefore, the embodiments of the present application can take the form of completely hardware embodiments, completely software embodiments, or embodiments combining software and hardware aspects. Moreover, the embodiments of the present application can take the form of a computer program product implemented on one or more machine-readable media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) that contain computer-usable program code.

[0129] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing terminal devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing terminal devices generate means for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0130] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0131] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, such that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0132] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0133] Finally, it should also be noted that in this text, 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 actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0134] The above provides a detailed introduction to a vehicle aerodynamic drag control method, device, vehicle and storage medium provided by the present application. Specific examples are used in this text to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A method for controlling the aerodynamic drag of a vehicle, characterized in that, The vehicle includes a blowing device and a spoiler provided at the rear, and the method includes: Obtaining the vehicle speed and the static pressure at the rear of the vehicle, and determining the braking state of the vehicle; Judging whether the vehicle meets the condition of reducing aerodynamic drag according to the vehicle speed and the static pressure at the rear of the vehicle; and judging whether the vehicle meets the condition of increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle; If the vehicle meets the condition of reducing aerodynamic drag control, adjust the blowing device and the spoiler of the vehicle to reduce the aerodynamic drag of the vehicle; If the vehicle meets the condition of increasing aerodynamic drag control, adjust the blowing device and the spoiler of the vehicle to increase the aerodynamic drag of the vehicle.

2. The method according to claim 1, wherein The judging whether the vehicle meets the condition of reducing aerodynamic drag according to the vehicle speed and the static pressure at the rear of the vehicle includes: When the vehicle speed is greater than the first preset vehicle speed, judging whether the vehicle speed matches the static pressure at the rear of the vehicle; If the vehicle speed does not match the static pressure at the rear of the vehicle, confirm that the vehicle meets the condition of reducing aerodynamic drag control.

3. The method according to claim 2, wherein The judging whether the vehicle speed matches the static pressure at the rear of the vehicle includes: When the ratio of the vehicle speed to the static pressure at the rear of the vehicle exceeds the preset range, determine that the vehicle speed does not match the static pressure at the rear of the vehicle.

4. The method according to claim 1, wherein The judging whether the vehicle meets the condition of increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle includes: When the braking state of the vehicle is emergency braking and the vehicle speed is greater than the second preset vehicle speed, determine that the vehicle meets the condition of increasing aerodynamic drag.

5. The method according to claim 1, characterized in that, The determining the braking state of the vehicle includes: Obtaining the braking cylinder pressure of the vehicle; When the braking cylinder pressure of the vehicle is greater than the preset pressure value, determine that the braking state of the vehicle is emergency braking.

6. The method according to claim 1, wherein The adjusting the blowing device and the spoiler of the vehicle to reduce the aerodynamic drag of the vehicle includes: Controlling the blowing device of the vehicle to blow air to the rear of the vehicle, and adjusting the angle of the spoiler of the vehicle to reduce the aerodynamic drag of the vehicle.

7. The method according to claim 1, characterized in that The adjusting the blowing device and the spoiler of the vehicle to increase the aerodynamic drag of the vehicle includes: Controlling the blowing device of the vehicle to blow air to the front of the vehicle, and adjusting the angle of the spoiler of the vehicle to be perpendicular to the vehicle to increase the aerodynamic drag of the vehicle.

8. A vehicle aerodynamic drag control device, characterized in that, The vehicle includes a blowing device and a spoiler provided at the rear, and the device includes: A vehicle information acquisition module for obtaining the vehicle speed and the static pressure at the rear of the vehicle, and determining the braking state of the vehicle; A vehicle information judgment module for judging whether the vehicle meets the condition of reducing aerodynamic drag according to the vehicle speed and the static pressure at the rear of the vehicle; and judging whether the vehicle meets the condition of increasing aerodynamic drag according to the vehicle speed and the braking state of the vehicle; An aerodynamic drag reduction module for adjusting the blowing device and the spoiler of the vehicle to reduce the aerodynamic drag of the vehicle if the vehicle meets the condition of reducing aerodynamic drag control; An aerodynamic drag increasing module, which is configured to adjust a blower device and a rear wing of the vehicle to increase the aerodynamic drag of the vehicle if the vehicle meets the aerodynamic drag increasing control condition.

9. A vehicle, characterized in that, Comprising: A processor, a memory, and a computer program stored on the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of a vehicle aerodynamic drag control method according to any one of claims 1-7 are implemented.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of a vehicle aerodynamic drag control method according to any one of claims 1-7 are implemented.

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