Environment self-adaptive flow guiding device for truck, truck and control method

Abstract

The invention provides an environment self-adaptive flow guide device for a truck, the truck and a control method, and belongs to the technical field of truck flow guide hoods, the environment self-adaptive flow guide device comprises a foldable flow guide hood, and the foldable flow guide hood is provided with a front fixed end and a lifting end opposite to the front fixed end; the front fixed end is hinged with a fixed part; the bottom of the lifting end is connected with a connecting rod assembly, and a transmission mechanism is installed on the connecting rod assembly and connected with an electric push rod. Defining an environment self-adaptive diversion control strategy; acquiring environment temperature information, wind speed and direction information and altitude information; and according to the altitude information, and / or the environment temperature information, and / or the wind speed and wind direction information, a lifting execution mechanism is controlled to operate based on an environment self-adaptive flow guide control strategy, and then the foldable flow guide cover is controlled to ascend and descend. The wind resistance is effectively reduced, the energy loss is reduced, the fuel economy is improved, and the endurance mileage of the new energy truck can be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of truck deflector covers, and in particular relates to an environment-adaptive deflector device for a truck, a truck and a control method. Background Art

[0002] The top of the truck cab is usually equipped with a deflector, which can prevent the sun from directly hitting the top of the cab and play a certain role in heat insulation and cooling. The deflector also changes the direction of airflow to form a streamlined transition between the cab and the car body, reducing the direct collision between the airflow and the car body, thereby reducing the air resistance coefficient.

[0003] However, since trucks travel in different regions, they encounter different weather and different environmental factors. Wind direction, wind speed, and temperature will change, which requires adjusting the angle of the air deflector. Traditional air deflectors, such as those mentioned in relevant documents, include a cover body and a telescopic mechanism; the front end of the cover body is used to be rotatably connected to the top of the vehicle body, the telescopic mechanism is connected between the cover body and the vehicle body, and the extension or retraction of the telescopic mechanism can change the height of the rear end of the cover body relative to the top of the vehicle body. It can be seen that the existing method can adjust the angle of the cover body through the telescopic mechanism, but it usually requires the user to actively adjust it, and it is impossible to achieve automatic adjustment according to the ambient temperature, wind speed and direction, and altitude information of the truck, and thus it is impossible to match the air deflector with the current wind direction, wind speed, and temperature, and it does not play a role in reducing fuel consumption, reducing wind resistance, and improving driving stability. Summary of the invention

[0004] The invention provides an environment-adaptive deflector device for a truck, which can automatically adjust the installation posture of a deflector cover according to specific environmental conditions, thereby optimizing the aerodynamic performance of the truck, reducing wind resistance, and improving economy.

[0005] The flow guide device comprises: a foldable flow guide cover, the foldable flow guide cover is provided with a front fixed end and a lifting end opposite to the front fixed end; The front fixed end is hinged with a fixing piece; The bottom of the lifting end is connected with a connecting rod assembly, a transmission mechanism is installed on the connecting rod assembly, and the transmission mechanism is connected with an electric push rod.

[0006] It should be further explained that the foldable air deflector is provided with two sections of hard plates and a soft plate; The soft board is arranged in the middle of two sections of hard boards, and the soft board is provided with folds.

[0007] It should be further explained that the connecting rod assembly is provided with two side connecting rods, two transition rods and an intermediate connecting rod.

[0008] Two side connecting rods are respectively arranged on the side of the bottom of the lifting end, one end of the side connecting rod is connected to the first end of the transition rod through a hinge, and the second end of the transition rod is connected to the middle connecting rod through a transmission mechanism.

[0009] According to another embodiment of the present application, a truck is provided, comprising: an environment-adaptive flow guide device for a truck, a temperature sensor, a wind speed and direction sensor, an altitude sensor, a memory, and a controller; The controller obtains the ambient temperature information by communicating with the temperature sensor; The controller obtains wind speed and direction information by communicating with the wind speed and direction sensor; The controller obtains the altitude information by communicating with the altitude sensor; The memory stores an environment-adaptive diversion control strategy; The controller is connected in communication with the electric push rod, and controls the operation of the lifting actuator according to the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information, and based on the environment adaptive diversion control strategy, thereby controlling the lifting and lowering of the foldable deflector.

[0010] It should be further explained that the environment-adaptive diversion control strategy includes: calculating air density and diversion shroud resistance; The air density is calculated based on: , where P is the air pressure, R is the gas constant, and T is the temperature; The form of the shroud resistance is: , where ρ is the air density, v is the wind speed, Cd is the drag coefficient, and A is the frontal area.

[0011] It should be further explained that the environment-adaptive flow guide control strategy further includes: defining a first angle θ1 of the foldable flow guide cover; Define wind speed v, when wind speed v<5m / s, define the first angle θ1 of the foldable deflector to be 10 to 12°; When the wind speed is 5m / s ≤v<15m / s, the first angle θ1 of the foldable deflector is defined as 20 to 23°; When the wind speed is 15 m / s ≤ v, the first angle θ1 of the foldable fairing is defined as 30 to 35°.

[0012] It should be further explained that the wind direction x is defined as , then the second angle of the foldable fairing θ2=θ1+x / 2; When the wind direction is x , then θ2=θ1-(180-θ1) / 2.

[0013] It should be further explained that, the altitude h is defined, if h>2000, then the third angle θ3 of the foldable fairing is = θ2×0.85; Define the ambient temperature information T, if T>35° C., then the fourth angle θ4 of the foldable air duct is =θ3×0.9.

[0014] It should be further explained that the controller obtains the first angle θ1, or the second angle θ2, or the third angle θ3, or the fourth angle θ4, and calculates the number of rotation steps B of the electric push rod motor, B=(θ1-θ0) / β; Or B = (θ2-θ0) / β; Or B = (θ3-θ0) / β; Or B = (θ4-θ0) / β; β is the motor step angle.

[0015] According to another embodiment of the present application, a control method is also provided, the method comprising: Define environmental adaptive diversion control strategy; The environmental adaptive diversion control strategy includes: adjusting the angle information of the foldable diversion cover based on the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information; Obtain ambient temperature information, wind speed and direction information, and altitude information; According to the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information, and based on the environment adaptive diversion control strategy, the operation of the lifting actuator is controlled to control the lifting of the foldable deflector.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages: The environmentally adaptive deflector device for trucks and the truck provided in the present application can sense the external environmental conditions of the truck by acquiring environmental temperature information, wind speed and direction information, and altitude information. When the environmental temperature information, wind speed and direction information, and altitude information change significantly, the angle of the foldable deflector is adjusted, which can effectively reduce the abnormal increase in air resistance caused by changes in air density, thereby reducing the engine load and improving fuel efficiency.

[0017] Dynamically adjusting the angle of the foldable fairing based on real-time wind speed and direction data can effectively reduce the impact of side winds on the truck body, reduce body sway and deviation, allow the driver to control the vehicle more easily, reduce the risk of accidents caused by side winds, ensure the safe transportation of goods, while also reducing driver fatigue and improving driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of an environmentally adaptive flow guide device for trucks; Figure 2 It is a schematic diagram of a foldable deflector cover; Figure 3 It is a schematic diagram of an embodiment of an environment-adaptive flow guide device for trucks; Figure 4 It is a schematic diagram of the flipping of the foldable deflector cover; Figure 5 A schematic diagram of a truck embodiment. DETAILED DESCRIPTION

[0020] The environmentally adaptive deflector device for trucks and the truck provided in the present application can reasonably adjust the deflector angle according to altitude information, ambient temperature information, wind speed and direction information to enhance the heat dissipation effect and ensure that the truck operates within a suitable temperature range; heat loss can also be reduced by changing the deflector angle.

[0021] The adjustment method involved in this application can dynamically adjust the deflector device under various environmental information, realize the intelligent automatic adjustment of the truck deflector, improve the adaptability of the truck to different environments, and improve the automation level of the transportation process.

[0022] The following will describe in detail the contents of the truck environment adaptive flow guide device, truck and control method. For the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are provided to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details.

[0023] It should be understood that the "one or more" mentioned in this application refers to one, two or more than two, and the "multiple" mentioned in this application refers to two or more. In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B. The "and / or" in this article is just a way to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0024] The phrases such as "one embodiment" or "some embodiments" described in the present application mean that the specific features, structures or characteristics described in the embodiment are included in one or more embodiments of the present application. Therefore, the phrases such as "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments" etc. that appear in different places in the present application do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 and Figure 2 The figure shows a schematic diagram of an environment-adaptive flow guide device for trucks in a specific embodiment. The flow guide device comprises: a foldable flow guide cover 1.

[0027] The foldable air deflector 1 has a front fixed end 2 and a lifting end 3 opposite to the front fixed end 2. The front fixed end 2 is connected to a fixing member by a hinged manner, and the fixing member is installed on a truck, so that the front fixed end 2 of the foldable air deflector 1 is fixed to the truck. This connection method enables the foldable air deflector 1 to rotate at a certain angle with the fixing member as a fulcrum. The bottom of the lifting end 3 is connected to a connecting rod assembly 4, which provides a transmission link for the lifting action of the foldable air deflector 1.

[0028] like Figure 3 As shown, the foldable air deflector 1 of this embodiment is composed of two sections of hard plates 5 and a soft plate 6. The soft plate 6 is located in the middle of the two sections of hard plates 5, and folds are provided on the soft plate 6. The design of the folds enables the soft plate 6 to flexibly deform when the foldable air deflector 1 is folded or unfolded, effectively avoiding damage caused by structural rigidity, and also facilitating adaptation to changes in airflow at different diversion angles, thereby ensuring the stability of the diversion effect.

[0029] In this embodiment, the connecting rod assembly 4 includes two side connecting rods 7, two transition rods 8 and an intermediate connecting rod 9. The two side connecting rods 7 are respectively installed on the two sides of the bottom of the lifting end 3. One end of the side connecting rod 7 is connected to the first end of the transition rod 8 by means of a hinge. The hinged connection method ensures that the side connecting rod 7 and the transition rod 8 can rotate relatively flexibly to adapt to different movement postures. The second end of the transition rod 8 is connected to the intermediate connecting rod 9 through a transmission mechanism 10. The transmission mechanism 10 plays a role in power transmission and conversion in the entire device, and can transmit the power from the electric push rod 11 to the connecting rod assembly 4, thereby driving the lifting action of the foldable air deflector 1.

[0030] This embodiment uses an electric push rod 11 as a lifting power source for the foldable air deflector 1, and provides driving force for the lifting of the foldable air deflector 1 through connection with the transmission mechanism 10. The electric push rod 11 can accurately adjust its telescopic length according to the control signal, thereby realizing the control of the lifting height of the foldable air deflector 1.

[0031] In this way, Figure 4 As shown, the design of the foldable deflector 1 and its ability to adjust the angle according to environmental information can optimize the aerodynamic performance of the truck in different driving environments. When the wind speed and direction, or the temperature and altitude have large changes, the deflector angle can be appropriately adjusted to reduce the additional wind resistance caused by the reduction of air density; under different wind speed and direction conditions, the deflector can change its angle in real time to better guide the airflow and reduce the wind resistance coefficient, thereby reducing the power loss of the engine and improving the fuel efficiency.

[0032] In combination with the above-mentioned environment-adaptive flow guide device for trucks, the present application also provides a truck, such as Figure 5 As shown, the truck includes: an environmentally adaptive flow guide device for the truck, a temperature sensor, a wind speed and direction sensor, an altitude sensor, a memory and a controller.

[0033] In some specific embodiments, a temperature sensor, a wind speed and direction sensor, and an altitude sensor are respectively installed at preset positions of the truck.

[0034] Optionally, the temperature sensor should be installed in a position to sense the external ambient temperature, such as near the air intake grille on the front of the truck or in a more ventilated area on the outside of the vehicle body, to avoid direct interference from heat sources such as the engine. The wind speed and direction sensor is installed at a higher position on the top of the truck to obtain more accurate wind speed and direction data that is not affected by the obstruction of the vehicle body. During installation, it is necessary to ensure that the horizontality and orientation of the sensor meet the detection requirements so that the sensor can sense changes in wind direction. The altitude sensor can be integrated into the vehicle's electronic control unit or installed separately in a suitable position in the vehicle, and works based on principles such as satellite positioning or air pressure measurement. After installation, perform initialization settings and calibrate with the vehicle's baseline altitude data to ensure the accuracy of altitude measurement.

[0035] In this embodiment, the controller is communicatively connected with the temperature sensor, the wind speed and direction sensor, the altitude sensor and the electric push rod 11 .

[0036] Optionally, a CAN bus protocol or a dedicated sensor communication protocol is used to ensure the stability and accuracy of data transmission. The connection lines should be arranged reasonably to avoid being affected by factors such as electromagnetic interference. For example, the communication lines use shielded lines and keep a certain distance from the vehicle's power lines and other strong power lines to prevent signal crosstalk. The controller is programmed to recognize the data format transmitted by each sensor and to send accurate control instructions to the electric push rod 11.

[0037] As an implementation method, the controller can be connected to a cache, that is, a data receiving buffer is set to cope with sudden peaks of sensor data transmission and prevent data loss.

[0038] In this embodiment, the environment adaptive diversion control strategy can be stored in the memory.

[0039] It should be noted that the environmental adaptive diversion control strategy can be a mathematical model or rule set derived from a large amount of experimental data and theoretical calculations. For example, based on wind tunnel experimental data at different altitudes, ambient temperatures, and wind speed and direction combinations, a mathematical relationship model for adjusting the angle of the foldable deflector 1 is established, and converted into a code form that can be recognized and executed by the controller and stored in the memory.

[0040] When the truck starts, the controller automatically loads the environmental adaptive diversion control strategy from the memory, ready to receive sensor data and process it.

[0041] Specifically, when the truck is running, the controller obtains ambient temperature information from the temperature sensor, wind speed and direction information from the wind speed and direction sensor, and altitude information from the altitude sensor at a set frequency.

[0042] The controller of this embodiment pre-processes the received data, including data filtering, to remove abnormal data points caused by sensor jitter or electromagnetic interference, etc. For example, a sliding average filtering algorithm is used to average the data of multiple consecutive sampling points to obtain relatively stable environmental information data.

[0043] According to the environment adaptive diversion control strategy, the processed ambient temperature information, wind speed and direction information, and altitude information are comprehensively analyzed. For example, if the altitude increases and the air density decreases, the control strategy calculates that the foldable deflector 1 should appropriately reduce the windward area, that is, adjust it to a smaller angle; if the wind speed is high and the wind direction is crosswind, it is calculated that the deflector should be tilted to the windward side at a certain angle to reduce the impact of the crosswind, etc.

[0044] As for the control method of the foldable air deflector 1, the controller generates an instruction for controlling the movement of the electric push rod 11 according to the analysis result.

[0045] The control command includes the extension direction and extension amount of the electric push rod 11. For example, if the foldable deflector 1 needs to rise to increase the windward angle, the controller sends a command to extend a certain length to the electric push rod 11; if it needs to descend to reduce the angle, a contraction command is sent.

[0046] After receiving the command, the electric push rod 11 drives the connecting rod assembly 4 to move through the transmission mechanism 10, thereby realizing the rise or fall of the lifting end 3 of the foldable air deflector 1 and completing the adjustment of the angle of the foldable air deflector 1. During the movement of the electric push rod 11, the controller monitors its movement state in real time, such as position feedback, current feedback, etc., to ensure that it operates in a preset manner. If an abnormal situation occurs, such as the electric push rod 11 being stuck or overloaded, the controller immediately stops the operation and sends a fault alarm signal to ensure the safety and reliability of the system.

[0047] A display can be provided in the cab as required to display the current angle information of the foldable deflector 1, and can also display the altitude information, ambient temperature information, and wind speed and direction information.

[0048] As an implementation strategy of this embodiment, a large amount of parameter data of trucks driving under different wind speeds, wind directions, altitudes and temperatures can be collected, including the angle and position setting of the deflector, vehicle speed, fuel consumption, driving stability, etc. The acquired data is marked, and the marked categories may include good fuel economy, good driving stability, significant wind resistance reduction effect, etc.

[0049] Select a decision tree model or a neural network model, divide the acquired data into a training set and a test set, use parameters such as wind speed, wind direction, altitude, and temperature as input features, and use the angle and position adjustment strategy of the deflector as output labels.

[0050] The decision tree model is trained using the training set. By adjusting the model parameters (such as tree depth, node splitting rules, etc.), the model can accurately predict the optimal control strategy of the deflector based on the input parameters.

[0051] In this embodiment, the trained model can be evaluated using the test set to calculate the model's accuracy, recall rate and other evaluation indicators. If the model performance meets the requirements, it can be applied to the actual deflector control strategy setting.

[0052] When new wind speed, wind direction, altitude and temperature data are obtained, they are input into the model, and the model outputs the optimal adjustment strategy for the angle and position of the deflector.

[0053] As for the wind speed, wind direction, altitude and temperature data involved in this embodiment, different interval ranges can be set to control the operation of the lifting actuator according to the environmental adaptive diversion control strategy, thereby controlling the lifting and lowering of the foldable deflector 1.

[0054] For example, the wind speed range can be divided into different intervals, such as 0-8 m / s, 8 m / s-20 m / s, 20 m / s-33 m / s, etc. Wind speed is an important factor affecting the angle and position adjustment of the deflector. Different wind speed ranges correspond to different aerodynamic requirements. The greater the wind speed, the more the deflector needs to be adjusted to an angle and position that is more conducive to reducing wind resistance.

[0055] The wind direction in this embodiment is an angle range measured with the front direction of the vehicle as 0°, such as 0-45°, 45°-90°, etc. The wind direction determines the direction of the airflow relative to the truck and the deflector, thereby affecting the fine adjustment of the deflector angle.

[0056] The altitude range takes into account that changes in altitude will cause changes in physical properties such as air density. It can be set to 1000-2000 meters. At high altitudes, the air density is lower and the wind resistance is relatively small, so the angle and position adjustment of the deflector may be reduced accordingly to avoid excessive deflection affecting vehicle stability.

[0057] The temperature range can be set to different temperature intervals, such as -10°C to 0°C, 0°C to 15°C, 15°C to 30°C, etc. Similar to the altitude factor, the air density change is considered to adjust the deflector. Higher temperatures usually mean lower air density, leading to changes in adjustment strategies, such as appropriately reducing the deflector angle adjustment.

[0058] In this embodiment, when the foldable air deflector is adjusted, the foldable air deflector has an initial angle. The adjustment is performed according to the influence of wind speed, wind direction, altitude and temperature on the air deflector. The angle calculated by the environmental adaptive air deflection control strategy can be the adjustment angle or the adjusted angle. In this way, the air deflector can better adapt to the airflow direction and optimize the aerodynamic performance.

[0059] For example, the final angle of the deflector = the initial angle of the deflector + the angle adjustment calculation angle. Wind speed 8m / s, wind direction 60°, altitude 500m, temperature 20°C, deflector initial angle 20°, if the angle adjustment calculation angle is the deflector initial angle + (60-45) / 2 = 7.5°, then the final deflector angle is 27.5°.

[0060] The following is an embodiment of the control method provided by the embodiment of the present disclosure. The control method and the trucks in the above-mentioned embodiments belong to the same inventive concept. For details not fully described in the embodiment of the control method, reference can be made to the above-mentioned truck embodiments.

[0061] The method includes: defining an environment-adaptive diversion control strategy; The environmental adaptive diversion control strategy includes: adjusting the angle information of the foldable diversion cover based on the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information; Obtain ambient temperature information, wind speed and direction information, and altitude information; According to the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information, and based on the environment adaptive diversion control strategy, the operation of the lifting actuator is controlled to control the lifting of the foldable deflector.

[0062] In one embodiment of the present application, based on the control method, a possible embodiment will be given below to illustrate its specific implementation scheme in a non-limiting manner.

[0063] The controller obtains the current altitude information through the altitude sensor.

[0064] Get the current ambient temperature through the temperature sensor.

[0065] Get real-time wind speed and direction data by integrating a local weather app or a wind speed and direction sensor, also known as an anemometer and a wind vane.

[0066] Based on the altitude and temperature, use the following formula to calculate the current air density and viscosity. Air Density Model: , where P is the air pressure, which can be calculated based on the altitude, R is the gas constant, and T is the temperature.

[0067] According to the principles of aerodynamics, the drag model of the fairing at different angles and positions is established. The resistance Fd can be expressed as: , where ρ is the air density, v is the wind speed, Cd is the drag coefficient (related to the angle and position of the deflector), and A is the frontal area.

[0068] This embodiment can find the angle and position of the fairing that minimizes the resistance under different environmental conditions based on the resistance model and particle swarm optimization.

[0069] Different control strategies are set according to the combination of wind speed, wind direction, altitude and temperature. For example, in low temperature and high altitude areas, the deflector angle is increased to reduce resistance; in high temperature and low viscosity conditions, the angle is reduced to reduce energy consumption.

[0070] According to the best angle and position obtained by the optimization algorithm, instructions are sent to the actuator through the controller.

[0071] Optionally, the controller controls the operation of two electric push rods, one for adjusting the installation angle and height of the air deflector, and the other for adjusting the extension or folding of the air deflector in the left and right directions.

[0072] The status of the air deflector and changes in environmental parameters are monitored in real time through sensors.

[0073] Based on the feedback data, the controller adjusts the angle and position of the deflector to adapt to changing environmental conditions.

[0074] The environmentally adaptive diversion control strategy of this embodiment can control the diversion cover to maintain a smaller angle when the wind speed is less than 5m / s, so as to reduce energy consumption.

[0075] When the wind speed is >15m / s, increase the angle of the deflector to reduce air resistance and improve vehicle stability.

[0076] According to the wind direction data, adjust the left and right directions of the deflector so that the windward side of the deflector is always facing the wind direction to minimize resistance as much as possible.

[0077] In case of strong crosswind, the extension of the fairing can be adjusted to provide better lateral stability.

[0078] The algorithm for controlling the truck's shroud at different wind speeds needs to take into account multiple factors, including aerodynamic efficiency, vehicle stability, and energy consumption. Below is a simplified algorithm framework for adjusting the angle and position of the shroud based on wind speed.

[0079] Specifically, the environment-adaptive flow guide control strategy further includes: defining a first angle θ1 of the foldable flow guide cover.

[0080] A wind speed v is defined. When the wind speed v is less than 5 m / s, a first angle θ1 of the foldable fairing is defined as 10 to 12°.

[0081] When the wind speed is 5 m / s ≤v<15 m / s, the first angle θ1 of the foldable fairing is defined as 20 to 23°.

[0082] When the wind speed is 15 m / s ≤ v, the first angle θ1 of the foldable fairing is defined as 30 to 35°.

[0083] This embodiment also defines a wind direction x. , then the second angle of the foldable fairing θ2=θ1+x / 2; When the wind direction is x , then θ2=θ1-(180-θ1) / 2.

[0084] Define the altitude h, if h>2000, then the third angle θ3 of the foldable fairing is =θ2×0.85.

[0085] Define the ambient temperature information T, if T>35° C., then the fourth angle θ4 of the foldable air duct is =θ3×0.9.

[0086] The controller obtains the first angle θ1, or the second angle θ2, or the third angle θ3, or the fourth angle θ4, and calculates the number of rotation steps B of the electric push rod motor, where B=(θ1-θ0) / β. β is the motor step angle.

[0087] This is the algorithm that performs the angle adjustment for the collapsible shroud when considering wind speed alone.

[0088] Or B = (θ2-θ0) / β; this is an algorithm for performing angle adjustment on the foldable deflector while taking into account wind speed and wind direction.

[0089] Or B = (θ3-θ0) / β; this is an algorithm for performing angle adjustment on the foldable deflector when considering wind speed, wind direction, and altitude.

[0090] Or B = (θ4-θ0) / β; this is an algorithm for performing angle adjustment on the foldable deflector while considering wind speed, wind direction, altitude, and ambient temperature.

[0091] It can be seen that in the control method, when facing crosswind, the angle of the foldable deflector is automatically adjusted according to the wind speed and direction information, which can effectively balance the lateral force generated by the crosswind on the truck body. By changing the deflector angle, the force distribution of the airflow on the vehicle body is more reasonable, reducing the shaking and deviation of the vehicle body, improving the stability of the vehicle driving, and ensuring the safety of cargo transportation.

[0092] The combined structure of two sections of hard plates and a soft plate with folds in the foldable air deflector involved in this application makes it more adaptable when dealing with different air deflection requirements and environmental changes. The hard plate provides basic structural support and air deflection shape, and the folds of the soft plate allow for flexible deformation during folding and angle adjustment, avoiding structural damage caused by frequent adjustments or external force impacts, and extending the service life of the air deflector.

[0093] It should be understood that when an element or layer is referred to as being "on", "connected" or "coupled" to another element or layer, it may be directly on, directly connected or coupled to the other element or layer, or there may be intermediate elements or layers. Conversely, when an element is referred to as being "directly on", "directly connected" or "directly coupled" to another element or layer, there are no intermediate elements or layers. Similar numbers in all figures indicate similar elements. As used herein, the term "and / or" includes any and all combinations of one or more of the relevant listed items.

[0094] Spatially relative terms may be used for ease of description, such as "under," "below," "lower," "above," "above," etc. to describe the relationship of one element or feature to another element or feature as shown in the figure. It should be understood that the spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation shown in the figure. For example, if the device in the figure is turned over, the elements described as "under" or "below" other elements or features will be facing "above" the other elements or features. Thus, the exemplary term "below" can include both the above and below orientations. The device can be made to take other orientations (rotated 90 degrees or other orientations), and the spatially relative terms used here are interpreted accordingly.

[0095] The controllers involved in the present application can be implemented by using at least one of an application-specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to perform the functions described herein. In some cases, such an implementation can be implemented in a controller. For software implementation, implementations such as processes or functions can be implemented with separate software modules that allow execution of at least one function or operation. The software code can be implemented by a software application (or program) written in any appropriate programming language, and the software code can be stored in a memory and executed by a controller.

[0096] The memory can be used to store software programs and various data. The memory can include high-speed random access memory and can also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0097] The memory may be any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0098] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmentally adaptive flow guide device for a truck, characterized in that: include: A foldable air deflector, wherein the foldable air deflector is provided with a front fixed end and a lifting end opposite to the front fixed end; The front fixed end is hinged with a fixing piece; The bottom of the lifting end is connected with a connecting rod assembly, a transmission mechanism is installed on the connecting rod assembly, and the transmission mechanism is connected with an electric push rod.

2. The environment-adaptive flow guide device for trucks according to claim 1, characterized in that: The foldable air deflector is provided with two sections of hard plates and a soft plate; The soft board is arranged in the middle of two sections of hard boards, and the soft board is provided with folds.

3. The environment-adaptive flow guide device for trucks according to claim 1, characterized in that: The connecting rod assembly is provided with two side connecting rods, two transition rods and an intermediate connecting rod; Two side connecting rods are respectively arranged on the side of the bottom of the lifting end, one end of the side connecting rod is connected to the first end of the transition rod through a hinge, and the second end of the transition rod is connected to the middle connecting rod through a transmission mechanism.

4. A truck, characterized in that: include: The environmentally adaptive flow guiding device, temperature sensor, wind speed and direction sensor, altitude sensor, memory and controller according to any one of claims 1 to 3; The controller obtains the ambient temperature information by communicating with the temperature sensor; The controller obtains wind speed and direction information by communicating with the wind speed and direction sensor; The controller obtains the altitude information by communicating with the altitude sensor; The memory stores an environment-adaptive diversion control strategy; The controller is connected in communication with the electric push rod, and controls the operation of the lifting actuator according to the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information, and based on the environment adaptive diversion control strategy, thereby controlling the lifting and lowering of the foldable deflector.

5. The truck according to claim 4, characterized in that The environmental adaptive diversion control strategy includes: calculating air density and diversion shroud resistance; The air density is calculated based on: , where P is the air pressure, R is the gas constant, and T is the temperature; The form of the shroud resistance is: , where ρ is the air density, v is the wind speed, Cd is the drag coefficient, and A is the frontal area.

6. The truck according to claim 4, characterized in that The environment-adaptive flow guide control strategy further includes: defining a first angle θ1 of the foldable flow guide cover; Define wind speed v, when wind speed v<5m / s, define the first angle θ1 of the foldable deflector to be 10 to 12°; When the wind speed is 5m / s ≤v<15m / s, the first angle θ1 of the foldable deflector is defined as 20 to 23°; When the wind speed is 15 m / s ≤ v, the first angle θ1 of the foldable fairing is defined as 30 to 35°.

7. The truck according to claim 6, characterized in that Define wind direction x. When wind direction x , then the second angle of the foldable fairing θ2=θ1+x / 2; When the wind direction is x , then θ2=θ1-(180-θ1) / 2.

8. The truck according to claim 7, characterized in that Define the altitude h, if h>2000, then the third angle of the foldable fairing θ3=θ2×0.85; The ambient temperature information T is defined. If T>35° C., the fourth angle θ4 of the foldable air duct is θ3×0.

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9. The truck according to claim 8, characterized in that The controller obtains the first angle θ1, or the second angle θ2, or the third angle θ3, or the fourth angle θ4, and calculates the number of rotation steps B of the electric push rod motor, where B=(θ1-θ0) / β; Or B = (θ2-θ0) / β; Or B = (θ3-θ0) / β; Or B = (θ4-θ0) / β; β is the motor step angle.

10. A control method, characterized in that: The method is performed based on the truck according to any one of claims 4 to 9; Methods include: Define environmental adaptive diversion control strategy; The environmental adaptive diversion control strategy includes: adjusting the angle information of the foldable diversion cover based on the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information; Obtain ambient temperature information, wind speed and direction information, and altitude information; According to the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information, and based on the environment adaptive diversion control strategy, the operation of the lifting actuator is controlled to control the lifting of the foldable deflector.

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