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

Abstract

The application provides a truck environment adaptive flow guiding device, a truck and a control method, and belongs to the technical field of truck flow guiding hoods, and comprises: a foldable flow guiding hood, the foldable flow guiding 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 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. An environment adaptive flow guiding control strategy is defined; environment temperature information, wind speed and direction information and altitude information are acquired; the lifting actuator is controlled to operate according to the altitude information and / or the environment temperature information and / or the wind speed and direction information and based on the environment adaptive flow guiding control strategy, so as to control the folding flow guiding hood to lift. The wind resistance is effectively reduced, the energy loss is reduced, the fuel economy is improved, and the endurance mileage of a new energy truck can also be increased.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of truck fairing, in particular to a truck environment adaptive fairing device, a truck and a control method. BACKGROUND

[0002] The cab top of the truck is usually equipped with a fairing, which can avoid direct sunlight on the cab top and play a certain heat insulation and cooling role. The fairing also changes the airflow direction to form a streamlined transition between the cab and the carriage, reducing the direct collision of airflow and the carriage body, thereby reducing the air resistance coefficient.

[0003] However, since the truck will travel in different regions, it will encounter different weather and different environmental factors. The wind direction, wind speed and temperature change, which requires the angle of the fairing to be adjusted. The traditional fairing, such as the one described in the related document, includes a cover body and an extension mechanism; the front end of the cover body is used to rotate with the top of the vehicle body, the extension mechanism is connected between the cover body and the vehicle body, and the extension or retraction of the extension 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 extension mechanism, but usually requires user to actively adjust, and cannot automatically adjust according to the environmental temperature, wind speed, wind direction and altitude information of the truck, so as to match the fairing with the current wind direction, wind speed and temperature, thereby reducing fuel consumption, reducing wind resistance and improving driving stability. SUMMARY

[0004] The present application provides a truck environment adaptive fairing device, which can automatically adjust the installation attitude of the fairing according to the specific environmental conditions, thereby optimizing the aerodynamic performance of the truck, reducing the wind resistance and improving the economy.

[0005] The fairing device comprises a foldable fairing, which is provided with a front fixed end and a lifting end opposite to the front fixed end;

[0006] The front fixed end is hinged with a fixing piece;

[0007] The bottom of the lifting end is connected with a linkage assembly, the linkage assembly is installed with a transmission mechanism, and the transmission mechanism is connected with an electric push rod.

[0008] It is further pointed out that the foldable fairing is provided with two hard plates and a soft plate;

[0009] The soft plate is arranged in the middle of the two hard plates, and the soft plate is provided with wrinkles.

[0010] It is further pointed out that the linkage assembly is provided with two side linkages, two transition rods and a middle linkage.

[0011] Two side connecting rods are arranged at the side of the bottom of the lifting end, one end of the side connecting rod is connected with the first end of the transition rod through a hinge, and the second end of the transition rod is connected with the middle connecting rod through a transmission mechanism.

[0012] According to another embodiment of the application, a truck is provided, comprising: an environment-adaptive flow guiding device for truck, a temperature sensor, a wind speed and direction sensor, an altitude sensor, a memory and a controller;

[0013] The controller is in communication connection with the temperature sensor to obtain environmental temperature information;

[0014] The controller is in communication connection with the wind speed and direction sensor to obtain wind speed and direction information;

[0015] The controller is in communication connection with the altitude sensor to obtain altitude information;

[0016] The memory stores an environment-adaptive flow guiding control strategy;

[0017] The controller is in communication connection with the electric push rod, and controls the lifting actuator to operate according to the altitude information, and / or the environmental temperature information, and / or the wind speed and direction information, and based on the environment-adaptive flow guiding control strategy, so as to control the folding flow hood to lift.

[0018] It is further needed to be explained that the environment-adaptive flow guiding control strategy comprises: calculating air density and flow hood resistance;

[0019] The air density is calculated based on the following way:

[0020] Wherein, P is air pressure, R is gas constant, and T is temperature;

[0021] The flow hood resistance is calculated in the following way:

[0022] Wherein, p is air density, v is wind speed, Cd is resistance coefficient, and A is windward area.

[0023] It is further needed to be explained that the environment-adaptive flow guiding control strategy further comprises: defining a first angle θ1 of the folding flow hood;

[0024] When the wind speed v<5m / s, the first angle θ1 of the folding flow hood is defined as 10-12°;

[0025] When the wind speed 5m / s≤v<15m / s, the first angle θ1 of the folding flow hood is defined as 20-23°;

[0026] When the wind speed is 15m / s≤v, the first angle θ1 of the foldable fairing is defined as 30-35°.

[0027] It is further explained that the wind direction x is defined, when the wind direction x Then the second angle θ2 of the foldable fairing is θ2=θ1+x / 2.

[0028] When the wind direction x Then θ2=θ1-(180-θ1) / 2.

[0029] It is further explained that the altitude h is defined, if h>2000, the third angle θ3 of the foldable fairing is θ3=θ2×0.85.

[0030] The ambient temperature information T is defined, if T>35℃, the fourth angle θ4 of the foldable fairing is θ4=θ3×0.9.

[0031] It is 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 rotation step number B of the motor of the electric push rod, B=(θ1-θ0) / β.

[0032] Or B=(θ2-θ0) / β.

[0033] Or B=(θ3-θ0) / β.

[0034] Or B=(θ4-θ0) / β.

[0035] β is the step angle of the motor.

[0036] According to another embodiment of the present application, a control method is also provided, the method comprising:

[0037] Defining an environment adaptive fairing control strategy;

[0038] The environment adaptive fairing control strategy comprises angle information of the foldable fairing adjusted based on altitude information, and / or ambient temperature information, and / or wind speed and direction information.

[0039] Obtaining the ambient temperature information, the wind speed and direction information, and the altitude information;

[0040] Controlling the lifting actuator to operate based on the altitude information, and / or the ambient temperature information, and / or the wind speed and direction information, and based on the environment adaptive fairing control strategy, thereby controlling the foldable fairing to lift and lower.

[0041] From the above technical solutions, the present application has the following advantages:

[0042] The truck environment adaptive flow guiding device and the truck provided by the application can perceive the external environment condition of the truck by acquiring the environment temperature information, the wind speed and direction information and the altitude information. When the environment temperature information, the wind speed and direction information and the altitude information change greatly, the angle of the foldable flow cover is adjusted, the abnormal increase of air resistance caused by the change of air density is effectively reduced, the engine load is reduced, and the fuel utilization rate is improved.

[0043] The dynamic angle adjustment of the foldable flow cover according to the real-time wind speed and direction data can effectively reduce the impact force of crosswind on the truck body, reduce the shaking and deviation of the truck body, enable the driver to more easily control the vehicle, reduce the accident risk caused by crosswind, ensure the safe transportation of goods, reduce the fatigue of the driver and improve the driving comfort. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the application, the drawings needed to be used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Figure 1 It is a schematic view of the truck environment adaptive flow guiding device.

[0046] Figure 2 It is a schematic view of the foldable flow cover.

[0047] Figure 3 It is a schematic view of the truck environment adaptive flow guiding device.

[0048] Figure 4 It is a schematic view of the foldable flow cover.

[0049] Figure 5 It is a schematic view of the truck. DETAILED DESCRIPTION

[0050] The truck environment adaptive flow guiding device and the truck provided by the application can reasonably adjust the angle of the flow cover according to the altitude information, the environment temperature information and the wind speed and direction information, can enhance the heat dissipation effect, and can ensure that the truck works in a suitable temperature range. The angle of the flow cover can also be changed to reduce heat dissipation.

[0051] The adjustment mode related by the application can meet the dynamic adjustment of the flow guiding device under various environment information, realize the intelligent automatic adjustment of the truck flow cover, improve the adaptability of the truck to different environments, and improve the automation level of the transportation process.

[0052] The truck environment-adaptive flow guiding device, the truck and the control method will be described in detail below. For the purpose of illustration but not for the purpose of limitation, specific details such as specific system structures, techniques, etc. are presented in order to thoroughly understand the embodiments of the present application. However, it should be clear for those skilled in the art that the present application can also be implemented in other embodiments without these specific details.

[0053] It should be understood that the "one or more" mentioned in the present application refers to one, two or more than two, and the "multiple" mentioned in the present application refers to two or more than two. In the description of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B. The "and / or" in the present application only describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone.

[0054] The phrase "one embodiment" or "some embodiments" or the like appearing in the present application means that the specific feature, structure or characteristic described in the embodiment is included in one or more embodiments of the present application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" appearing 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.

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0056] Please refer to Figure 1 and Figure 2 Fig. 1 is a schematic diagram of a truck environment-adaptive flow guiding device in a specific embodiment. The flow guiding device comprises a foldable flow guiding cover 1.

[0057] The foldable flow guiding cover 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 fixed part by a hinged way, and the fixed part is installed on the truck, so that the front fixed end 2 of the foldable flow guiding cover 1 is fixed to the truck. This connection way enables the foldable flow guiding cover 1 to rotate at a certain angle with the fixed part as the fulcrum. The bottom of the lifting end 3 is connected with a connecting rod assembly 4, which provides a transmission link for the lifting action of the foldable flow guiding cover 1.

[0058] As Figure 3As shown, the foldable air deflector 1 of this embodiment is composed of two rigid panels 5 and a flexible panel 6. The flexible panel 6 is located between the two rigid panels 5 and is provided with pleats. The pleated design allows the flexible panel 6 to flexibly deform when the foldable air deflector 1 is folded or unfolded, effectively preventing damage caused by structural rigidity. It also helps adapt to changes in airflow at different diversion angles, ensuring the stability of the diversion effect.

[0059] 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 mounted on both 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. This hinged connection ensures that the side connecting rod 7 and the transition rod 8 can rotate flexibly relative to each other to accommodate different movement postures. The second end of the transition rod 8 is connected to the intermediate connecting rod 9 via a transmission mechanism 10. The transmission mechanism 10 plays a role in power transmission and conversion in the entire device, transmitting power from the electric push rod 11 to the connecting rod assembly 4, thereby driving the lifting and lowering movement of the foldable air deflector 1.

[0060] This embodiment uses an electric push rod 11 as the power source for raising and lowering the foldable air deflector 1. Through connection with the transmission mechanism 10, it provides driving force for raising and lowering the foldable air deflector 1. The electric push rod 11 can accurately adjust its extension length according to the control signal, thereby achieving control of the raising and lowering height of the foldable air deflector 1.

[0061] In this way, Figure 4 As shown, the design of the foldable deflector 1, and its ability to adjust its angle based on environmental information, optimizes the truck's aerodynamic performance in various driving environments. When there are significant changes in wind speed and direction, or temperature and altitude, the deflector angle can be adjusted appropriately to reduce the additional wind resistance caused by reduced air density. Under varying wind speeds and directions, the deflector's angle can be adjusted in real time to better guide airflow, reducing the drag coefficient, thereby reducing engine power loss and improving fuel efficiency.

[0062] 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.

[0063] In some specific embodiments, a temperature sensor, a wind speed and direction sensor, and an altitude sensor are installed at preset positions of the truck.

[0064] Optionally, the temperature sensor should be installed in a position that can sense the ambient temperature, such as near the air intake grille of the truck cab or a more ventilated part 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 high position on the top of the truck to obtain more accurate and unobstructed wind speed and direction data. When installing, the levelness and orientation of the sensor should be ensured to meet the detection requirements, so that the sensor can sense the change of 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 by satellite positioning or air pressure measurement. After installation, the initialization setting is performed, and the calibration with the baseline altitude data of the vehicle is performed to ensure the accuracy of the altitude measurement.

[0065] 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.

[0066] Optionally, CAN bus protocol or dedicated sensor communication protocol is used to ensure the stability and accuracy of data transmission. The connection line should be arranged reasonably to avoid the influence of electromagnetic interference and other factors. For example, the communication line uses a shielded wire, and is kept a certain distance from the strong current line of the vehicle, to prevent signal crosstalk. The controller is programmed to recognize the data format transmitted by each sensor and send accurate control instructions to the electric push rod 11.

[0067] As an implementation manner, the controller can be connected with a cache, that is, a data receiving buffer is set to cope with the burst peak of sensor data transmission and prevent data loss.

[0068] The environment adaptive flow guiding control strategy can be stored in the memory.

[0069] It should be noted that the environment adaptive flow guiding control strategy can be a mathematical model or rule set based on a large amount of experimental data and theoretical calculation. For example, according to the wind tunnel experimental data under different combinations of altitude, ambient temperature and wind speed and direction, a mathematical relationship model of angle adjustment of the foldable flow guiding cover 1 is established, and it is converted into a code form that the controller can recognize and execute and stored in the memory.

[0070] When the truck starts, the controller automatically loads the environment adaptive flow guiding control strategy from the memory, prepares to receive sensor data and processes it.

[0071] Specifically, when the truck is running, the controller obtains the ambient temperature information from the temperature sensor, the wind speed and direction information from the wind speed and direction sensor, and the altitude information from the altitude sensor at a set frequency.

[0072] The controller of the embodiment pre-processes the received data, including data filtering, to remove abnormal data points caused by factors such as sensor jitter or electromagnetic interference. 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.

[0073] According to the environmental adaptive flow control strategy, the processed environmental temperature information, wind speed and direction information, and altitude information are comprehensively analyzed. For example, if the altitude increases, the air density decreases, and according to the control strategy, it is calculated that the foldable fairing 1 should appropriately reduce the windward area, that is, adjust to a smaller angle; if the wind speed is large and the wind direction is crosswind direction, it is calculated that the fairing should be inclined to the windward side at a certain angle to reduce the crosswind effect, etc.

[0074] For the control mode of the foldable fairing 1, the controller generates a control instruction for the movement of the electric push rod 11 according to the analysis result.

[0075] The control instruction includes the extension direction and extension amount of the electric push rod 11. For example, if the foldable fairing 1 needs to be raised to increase the windward angle, the controller sends a command to the electric push rod 11 to extend by a certain length; if it needs to be lowered to reduce the angle, a retraction command is sent.

[0076] After receiving the instruction, the electric push rod 11 drives the linkage assembly 4 to move through the transmission mechanism 10, thereby realizing the lifting or lowering of the lifting end 3 of the foldable fairing 1 and completing the adjustment of the angle of the foldable fairing 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 the preset manner. If an abnormal situation occurs, such as jamming or overloading of the electric push rod 11, the controller immediately stops operation and sends a fault alarm signal to ensure the safety and reliability of the system.

[0077] According to the need, a display can be provided in the cab to display the current angle information of the foldable fairing 1, and also the altitude information, environmental temperature information, wind speed and direction information.

[0078] As an implementation strategy of the embodiment, a large amount of parameter data of trucks driving under different wind speed, wind direction, altitude, and temperature conditions can be collected, including fairing angle and position setting, vehicle speed, fuel consumption, driving stability, etc. The obtained data is labeled, and the label categories can include good fuel economy, good driving stability, and obvious wind resistance reduction effect, etc.

[0079] Select a decision tree model or a neural network model to divide the obtained data into a training set and a test set. The wind speed, wind direction, altitude, temperature, etc. are used as input features, and the fairing angle and position adjustment strategy are used as output labels.

[0080] The decision tree model is trained using the training set by adjusting the parameters of the model (such as the depth of the tree, node splitting rules, etc.) so that the model can accurately predict the optimal control strategy for the fairing based on the input parameters.

[0081] The trained model can be evaluated using the test set to calculate evaluation metrics such as accuracy, recall rate, etc. If the model performance meets the requirements, it can be applied to the actual fairing control strategy setting.

[0082] 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 fairing angle and position.

[0083] As for the wind speed, wind direction, altitude, and temperature data involved in this embodiment, different interval ranges can be set to adaptively control the environmental fairing control strategy to control the lifting mechanism to operate, thereby controlling the folding fairing 1 to lift.

[0084] 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 adjustment of the fairing angle and position. Different wind speed ranges correspond to different aerodynamic requirements. The larger the wind speed, the more the fairing needs to be adjusted to a more favorable angle and position to reduce wind resistance.

[0085] The wind direction of this embodiment is measured in the range of angles with the vehicle head direction as 0°, such as 0-45°, 45°-90°, etc. The wind direction determines the direction of the airflow relative to the truck and the fairing, thereby affecting the fine adjustment of the fairing angle.

[0086] The altitude range takes into account the change in altitude, which can cause changes in air density and other physical properties. It can be set to 1000-2000 meters. In high-altitude areas, air density is lower, and wind resistance is relatively small, so the adjustment range of the fairing angle and position may be correspondingly reduced to avoid excessive fairing affecting vehicle stability.

[0087] 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 fairing. Higher temperatures usually mean lower air density, resulting in changes in the adjustment strategy, such as appropriately reducing the fairing angle adjustment amount.

[0088] In this embodiment, the foldable fairing has an initial angle when being adjusted. The adjustment is performed according to the influence of the wind speed, the wind direction, the altitude and the temperature on the fairing. The angle calculated by the environment-adaptive fairing control strategy can be the adjustment angle or the adjusted angle. In this way, the fairing can better adapt to the airflow direction and optimize the aerodynamic performance.

[0089] For example, the final angle of the fairing = the initial angle of the fairing + the angle adjustment calculation angle. When the wind speed is 8 m / s, the wind direction is 60°, the altitude is 500 m, the temperature is 20°C, the initial angle of the fairing is 20°, and the angle adjustment calculation angle is the initial angle of the fairing + (60-45) / 2 = 7.5°, the final angle of the fairing is 27.5°.

[0090] The following is an embodiment of the control method provided by the embodiment of the present disclosure, which belongs to the same inventive concept as the truck in the above embodiments. Details not described in the embodiment of the control method can be referred to the above embodiments of the truck.

[0091] The method comprises defining an environment-adaptive fairing control strategy.

[0092] The environment-adaptive fairing control strategy comprises angle information of the foldable fairing adjustment based on altitude information, and / or environmental temperature information, and / or wind speed and direction information.

[0093] The environmental temperature information, the wind speed and direction information, and the altitude information are obtained.

[0094] The lifting actuator is controlled to operate based on the altitude information, and / or the environmental temperature information, and / or the wind speed and direction information, and based on the environment-adaptive fairing control strategy, so as to control the lifting of the foldable fairing.

[0095] In an embodiment of the present application, based on the control method, a possible embodiment will be given below to non-limitingly illustrate the specific implementation thereof.

[0096] The controller obtains the current altitude information through an altitude sensor.

[0097] The current environmental temperature is obtained through a temperature sensor.

[0098] The real-time wind speed and direction data are obtained through an integrated local weather APP or a wind speed and direction sensor, i.e. an anemometer and a wind vane.

[0099] The current air density and viscosity are calculated according to the altitude and the temperature by using the following formula.

[0100] 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.

[0101] According to the principles of aerodynamics, a drag model for the fairing at different angles and positions is established.

[0102] The drag force 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 fairing), and A is the windward area.

[0103] This embodiment can use particle swarm optimization or other optimization methods to find the fairing angle and position that minimizes drag under different environmental conditions based on the drag model.

[0104] Based on the combination of wind speed, wind direction, altitude, and temperature, different control strategies are set. For example, in low-temperature and high-altitude areas, increase the angle of the fairing to reduce drag; in high-temperature and low-viscosity conditions, reduce the angle to reduce energy consumption.

[0105] According to the optimal angle and position obtained by the optimization algorithm, the controller sends instructions to the actuator.

[0106] Optionally, the controller controls the operation of two electric push rods, one for adjusting the installation angle and height of the fairing, and the other for adjusting the left and right direction of the fairing to stretch or fold.

[0107] The state of the fairing and changes in environmental parameters are monitored in real time by sensors.

[0108] Based on the feedback data, the controller adjusts the angle and position of the fairing to adapt to changing environmental conditions.

[0109] The environmental adaptive fairing control strategy of this embodiment can control the fairing to maintain a smaller angle when the wind speed is <5 m / s, reducing energy consumption.

[0110] At wind speeds >15 m / s, increase the angle of the fairing to reduce air resistance and improve vehicle stability.

[0111] According to the wind direction data, adjust the left and right direction of the fairing so that the windward surface of the fairing always aligns with the wind direction to maximize drag reduction.

[0112] In the case of strong crosswinds, better lateral stability can be provided by adjusting the extension of the fairing.

[0113] The algorithm for controlling the truck fairing at different wind speeds needs to consider multiple factors such as aerodynamic efficiency, vehicle stability, and energy consumption. The following is a simplified algorithm framework for adjusting the angle and position of the fairing based on wind speed.

[0114] Specifically, the environment-adaptive guide-vane control strategy further comprises: defining a first angle θ1 of the foldable guide-vane.

[0115] When the wind speed v is less than 5 m / s, the first angle θ1 of the foldable guide-vane is defined as 10-12°.

[0116] When the wind speed 5 m / s≤v<15 m / s, the first angle θ1 of the foldable guide-vane is defined as 20-23°.

[0117] When the wind speed 15 m / s≤v, the first angle θ1 of the foldable guide-vane is defined as 30-35°.

[0118] The embodiment further defines a wind direction x, when the wind direction x , the second angle θ2 of the foldable guide-vane is θ1+x / 2;

[0119] When the wind direction x , θ2=θ1-(180-θ1) / 2.

[0120] Define the altitude h, if h>2000, the third angle θ3 of the foldable guide-vane is θ2×0.85.

[0121] Define the ambient temperature information T, if T>35℃, the fourth angle θ4 of the foldable guide-vane is θ3×0.9.

[0122] The controller obtains the first angle θ1, or the second angle θ2, or the third angle θ3, or the fourth angle θ4, calculates the rotation step number B of the electric push rod motor, B=(θ1-θ0) / β. β is the motor step angle.

[0123] This is an algorithm for adjusting the angle of the foldable guide-vane when only considering the wind speed.

[0124] Or B=(θ2-θ0) / β; this is an algorithm for adjusting the angle of the foldable guide-vane when considering wind speed and wind direction.

[0125] Or B=(θ3-θ0) / β; this is an algorithm for adjusting the angle of the foldable guide-vane when considering wind speed, wind direction, and altitude.

[0126] Or B=(θ4-θ0) / β; this is an algorithm for adjusting the angle of the foldable guide-vane when considering wind speed, wind direction, altitude, and ambient temperature.

[0127] It can be seen that in the control method, when facing the side wind, the angle of the foldable fairing is automatically adjusted according to the wind speed and direction information, which can effectively balance the lateral force of the truck body generated by the side wind. By changing the angle of the fairing, the force distribution of the airflow on the vehicle body is more reasonable, the shaking and deviation of the vehicle body are reduced, the stability of the vehicle driving is improved, and the safety of the goods transportation is ensured.

[0128] The two-segment hard plate and the soft plate with folds of the foldable fairing involved in the present application are combined, which makes it have better adaptability when facing different fairing requirements and environmental changes. The hard plate provides basic structural support and fairing shape, and the folds of the soft plate allow flexible deformation during folding and angle adjustment, avoiding structural damage caused by frequent adjustment or external impact, prolonging the service life of the fairing.

[0129] It should be understood that when an element or layer is referred to as being "on", "connected to" or "coupled to" another element or layer, it can be directly on, connected or coupled to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0130] Spatially relative terms, such as "under", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0131] The controller to which the present application relates 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, an electronic unit designed to perform the functions described herein, and in some cases, such an implementation can be implemented in the controller. For software implementation, the implementation of such as a process or a function can be implemented with a separate software module allowing at least one function or operation to be performed. The software code can be implemented by a software application (or program) written in any suitable programming language, which can be stored in a memory and executed by the controller.

[0132] The memory can be used to store software programs as well as various data. The memory can include a high-speed random access memory, and can also include a non-volatile memory such as at least one magnetic disk storage device, a flash memory device, or other volatile solid state memory device.

[0133] The memory can employ any combination of one or more readable media. The readable media can be a readable signal medium or a readable storage medium. The readable storage medium, for example, can be, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include an electrical connection having one or more wires, a portable disc, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0134] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmentally adaptive flow guiding device for a truck, characterized in that The foldable fairing 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, the connecting rod assembly is installed with a transmission mechanism, and the transmission mechanism is connected with an electric push rod; The foldable fairing is provided with two hard plates and a soft plate; The soft plate is arranged between the two hard plates, and the soft plate is provided with a wrinkle; The connecting rod assembly is provided with two side connecting rods, two transition rods and a middle connecting rod; The two side connecting rods are respectively arranged at the side of the bottom of the lifting end, one end of the side connecting rod is connected with the first end of the transition rod through a hinge piece, and the second end of the transition rod is connected with the middle connecting rod through the transmission mechanism. The environmental self-adaptive fairing device, the temperature sensor, the wind speed and direction sensor, the altitude sensor, the memory and the controller of claim 1; 2. A truck characterized by The controller is connected with the temperature sensor to obtain the environmental temperature information; The controller is connected with the wind speed and direction sensor to obtain the wind speed and direction information; The controller is connected with the altitude sensor to obtain the altitude information; The memory stores the environmental self-adaptive fairing control strategy; The controller is connected with the electric push rod, and controls the lifting execution mechanism to operate according to the altitude information, and / or the environmental temperature information, and / or the wind speed and direction information, and controls the foldable fairing to lift based on the environmental self-adaptive fairing control strategy.

3. The truck of claim 2, wherein The environmental self-adaptive fairing control strategy comprises: calculating air density and fairing resistance; The air density is calculated based on the following mode: The mode of the fairing resistance is: The environmental self-adaptive fairing control strategy further comprises: defining a first angle θ1 of the foldable fairing; where P is the gas pressure, R is the gas constant, and T is the temperature. When the wind speed v < 5 m / s, the first angle θ1 of the foldable fairing is defined as 10-12°; where p is the air density, v is the wind speed, Cd is the drag coefficient, and A is the wind- facing area.

4. The truck of claim 2, wherein, When the wind speed 5 m / s ≤ v < 15 m / s, the first angle θ1 of the foldable fairing is defined as 20-23°; When the wind speed 15 m / s ≤ v, the first angle θ1 of the foldable fairing is defined as 30-35°.

5. The truck of claim 4, wherein 6. The truck of claim 5, wherein When the altitude h > 2000, the third angle θ3 of the foldable fairing is defined as θ2 x 0.85; Define the wind direction x, when the wind direction x Then the second angle θ2 of the foldable fairing = θ1 + x / 2; When the wind direction x Then θ2 = θ1 - (180 - θ1) / 2. When the environmental temperature information T > 35℃, the fourth angle θ4 of the foldable fairing is defined as θ3 x 0.

9.

7. The truck of claim 6, wherein 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 electric push rod motor rotation step number B, 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. The method is performed based on the truck of any one of claims 2 to 7; The method comprises:

8. A control method characterized by, Defining the environmental self-adaptive fairing control strategy; ​ ​ The environment self-adaptive flow guiding control strategy comprises: adjusting the angle information of the foldable flow hood based on the altitude information, and / or the environment temperature information, and / or the wind speed and direction information; Obtaining the environment temperature information, the wind speed and direction information, and the altitude information; Controlling the lifting actuator to operate based on the altitude information, and / or the environment temperature information, and / or the wind speed and direction information, and based on the environment self-adaptive flow guiding control strategy, so as to control the folding and unfolding of the foldable flow hood.

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