Control method and device for automobile active air inlet grille, server and medium

Abstract

The invention provides a control method and device for an automobile active air inlet grille, a server and a medium, and the method comprises the steps that according to the current cabin heat dissipation requirement, the opening degree of an AGS is controlled to be the target opening degree; collecting the current feedback voltage at the position of a brush motor contact of the AGS; the current feedback voltage is compared with the current target position voltage, the opening degree of the AGS is adjusted according to the comparison result, and the current target position voltage is obtained according to the target opening degree. According to the technical scheme, the purpose of accurately controlling the opening degree of the AGS through the brush motor is achieved, a brushless motor does not need to be arranged in an AGS actuator, the use cost is reduced, and the influence of the guarantee supply risk of chip resources on a production plan is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile active air intake grille actuator control, and in particular to a control method, system, server and medium for an automobile active air intake grille. Background Art

[0002] At present, most active grille actuators are driven by brushless motors. The actuators are controlled by LIN signals. The control module sets a control strategy in advance and controls the actuator according to the vehicle operating condition information. Driven by the actuator, the active grille blades flip to the target opening. Brushless motors often have built-in chips, which increases the manufacturing cost. On the other hand, there is a risk of chip resource supply. Summary of the invention

[0003] In view of this, one of the purposes of the embodiments of the present application is to provide a control method for an active air intake grille of an automobile, which can improve the problem of high cost of using brushless motors and the risk of chip resource supply affecting production capacity.

[0004] In order to achieve the above technical objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a method for controlling an active air intake grille of an automobile, the method comprising:

[0006] According to the current cabin heat dissipation requirements, the opening of the active air intake grille is controlled to the target opening;

[0007] Collect the current feedback voltage of the brush motor contact position of the active air intake grille;

[0008] The current feedback voltage is compared with the current target position voltage, and the opening of the active air intake grille is adjusted according to the comparison result, wherein the current target position voltage is obtained according to the target opening.

[0009] Furthermore, before comparing the current feedback voltage with the current target position voltage, the method further includes:

[0010] Acquire a corresponding relationship table, wherein the corresponding relationship table includes a mapping group of multiple groups of different target openings and corresponding target voltages;

[0011] According to the target opening, a target voltage corresponding to the target opening is searched in a correspondence table.

[0012] Further, the obtaining the corresponding relationship table includes:

[0013] Collecting a first feedback voltage and a second feedback voltage, wherein the first feedback voltage represents a feedback voltage corresponding to a position of an actuator contact piece of the active air intake grille when the active air intake grille is fully closed, and the second feedback voltage represents a feedback voltage corresponding to a position of an actuator contact piece of the active air intake grille when the active air intake grille is fully opened;

[0014] According to the first feedback voltage, the second feedback voltage and a preset mathematical algorithm, a plurality of third feedback voltages are obtained, wherein the third feedback voltages represent feedback voltages corresponding to when the opening of the active air intake grille is between fully open and fully closed.

[0015] Further, adjusting the opening of the active air intake grille according to the comparison result includes: when the difference between the current feedback voltage and the current target voltage is not 0, driving the brushed motor of the active air intake grille to rotate clockwise or counterclockwise according to the difference.

[0016] Further, controlling the opening of the active air intake grille to a target opening according to the current cabin heat dissipation demand includes:

[0017] Obtaining a current cabin cooling demand according to a cooling demand parameter, wherein the cooling demand parameter includes at least one of an engine cooling demand, an electric drive cooling demand, an air conditioning system cooling demand, and a fan demand;

[0018] Correct the current cabin cooling demand based on vehicle speed and outside temperature;

[0019] According to the corrected current cabin cooling demand, the opening of the active air intake grille is controlled to a target opening.

[0020] Further, obtaining the current cabin heat dissipation demand according to the heat dissipation demand parameter includes:

[0021] The current cabin cooling demand is obtained according to the maximum value of the engine cooling demand, the electric drive cooling demand, the air conditioning system cooling demand and the fan demand.

[0022] Furthermore, the preset mathematical algorithm is an interpolation operation.

[0023] In a second aspect, this embodiment provides a control device for an active air intake grille of an automobile, comprising:

[0024] a control module configured to control the opening of the active air intake grille to a target opening according to a current cabin heat dissipation requirement;

[0025] A collection module configured to collect a current feedback voltage of a brush motor contact position of an active air intake grille;

[0026] The adjustment module is configured to compare the current feedback voltage with the current target position voltage, and adjust the opening of the active air intake grille according to the comparison result, wherein the current target position voltage is obtained according to the target opening.

[0027] In a third aspect, this embodiment proposes a server, which includes a processor and a memory coupled to each other, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the server executes the above method.

[0028] In a fourth aspect, this embodiment proposes a computer-readable storage medium, in which a computer program is stored. When the computer program runs on a computer, the computer executes the above method.

[0029] The invention adopting the above technical solution has the following advantages:

[0030] In the technical solution provided in the present application, after controlling the opening of the active air intake grille to the target opening, the current feedback voltage of the contact position of the brush motor of the active air intake grille is collected, and the opening of the active air intake grille is adjusted according to the comparison result, thereby achieving the purpose of precise control of the opening of the active air intake grille by the brush motor, and eliminating the need to arrange a brushless motor inside the active air intake grille actuator, thereby reducing the cost of use and reducing the impact of the chip resource supply risk on the production plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present application may be further described by the non-limiting embodiments given in the accompanying drawings. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings may be obtained based on these drawings without creative effort.

[0032] Figure 1 A structural block diagram of the server provided in an embodiment of the present application.

[0033] Figure 2 A flowchart provided for an embodiment of the present application.

[0034] Figure 3 A voltage feedback schematic diagram of an actuator provided in an embodiment of the present application.

[0035] Figure 4 A structural diagram of the system provided in an embodiment of the present application.

[0036] Icon: 1-control module; 2-acquisition module; 3-adjustment module. DETAILED DESCRIPTION

[0037] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions, similar or identical parts use the same figure numbers, and the implementation methods not shown or described in the drawings are forms known to ordinary technicians in the relevant technical field. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] Please refer to Figure 1 The embodiment of the present application provides a server that may include a processing module and a storage module. The storage module stores a computer program, and when the computer program is executed by the processing module, the server can execute the corresponding steps in the control method of the active air intake grille of the automobile described below.

[0039] This embodiment controls the AGS (Active Grille Shutter) through a brushed DC motor, that is, the AGS actuator has a built-in carbon film brushed DC motor, and the carbon film contacts have different output voltages at different positions. By calibrating the voltage value, control at different angles can be achieved; the VIU collects the feedback voltage of the actuator contact position in real time, and determines the drive of the AGS based on the comparison between the real-time position feedback voltage and the target position voltage.

[0040] Please refer to Figure 2 The present application also provides a method for controlling an active air intake grille of an automobile. The method for controlling an active air intake grille of an automobile may include the following steps:

[0041] S110: Controlling the opening of the AGS to a target opening according to the current cabin cooling demand;

[0042] S120: Collect the current feedback voltage of the actuator contact position of the AGS;

[0043] S130: Compare the current feedback voltage with the current target position voltage, and adjust the opening of the AGS according to the comparison result. The current target position voltage is obtained according to the target opening.

[0044] The following will describe in detail the various steps of the control method of the active air intake grille of the automobile, as follows:

[0045] In S110, the domain controller VIU makes corrections based on the current cabin cooling requirements, the vehicle speed and the outside temperature, and confirms the grille opening that is currently required and meets the relevant cooling and wind resistance requirements.

[0046] The current cabin cooling demand is determined by the engine cooling demand, electric drive cooling demand, air conditioning system cooling demand and fan demand.

[0047] The engine cooling requirements are determined based on its operating conditions, heat load, and design parameters. These factors together determine the amount of heat that the engine needs to dissipate during operation to ensure that it can operate stably and efficiently and prevent damage caused by overheating. Here are some of the main methods and considerations for obtaining engine cooling requirements:

[0048] ①Engine power and thermal efficiency:

[0049] The greater the power output of an engine, the more heat it generates.

[0050] An engine with lower thermal efficiency means that more of the fuel energy is lost as heat, so the cooling requirement is higher.

[0051] ②Workload and speed:

[0052] When the engine runs at high load and high speed, it generates more heat.

[0053] Different working modes and conditions (such as idling, acceleration, constant speed driving, etc.) have different effects on heat dissipation requirements.

[0054] ③Ambient temperature and climate conditions:

[0055] The temperature and humidity of the external environment will affect the heat dissipation effect of the engine.

[0056] In hot or humid conditions, the cooling needs of the engine increase.

[0057] ④Cooling system design and efficiency:

[0058] The design and efficiency of the cooling system directly affects the ability to dissipate heat.

[0059] Factors such as coolant flow, temperature control, radiator area and layout will affect the heat dissipation effect.

[0060] ⑤Engine materials and heat capacity:

[0061] The thermal conductivity and heat capacity of engine materials affect the transfer and storage of heat.

[0062] Certain materials have better heat dissipation properties, which can reduce the need for cooling.

[0063] In order to obtain accurate engine cooling requirements, it is usually necessary to comprehensively consider the above factors and conduct detailed engineering analysis and calculations. In actual applications, adjustments and optimizations are also required according to specific circumstances to ensure that the engine can run stably and meet performance requirements.

[0064] The thermal requirements of electric drive of automobiles involve many aspects, including the power, thermal design, operating environment and efficiency of cooling system of electric drive system. The following are some main methods and considerations for thermal requirements of electric drive:

[0065] 1. Power and thermal efficiency of electric drive system

[0066] Power output: The greater the power output of the electric drive system, the more heat it generates. Therefore, you first need to understand the rated power and maximum output power of the electric drive system.

[0067] Thermal efficiency: The thermal efficiency of the electric drive system will also affect its heat dissipation requirements. Although the thermal efficiency of the electric drive system is relatively high, some energy will still be dissipated in the form of heat energy, which needs to be discharged through the cooling system.

[0068] 2. Operating Environment

[0069] Climate conditions: The temperature and humidity of the external environment will significantly affect the heat dissipation of the electric drive system. In hot or humid environments, the heat dissipation requirements of the electric drive system will increase accordingly.

[0070] Vehicle operating conditions: Different vehicle operating conditions (such as high-speed driving, low-speed climbing, long-term idling, etc.) also have different effects on the heat dissipation requirements of the electric drive system. For example, when driving at high speed, the workload of the electric drive system is greater and more heat is generated.

[0071] 3. Cooling system design and efficiency

[0072] Cooling system type: Electric drive systems usually use liquid cooling, but they may also use air cooling or natural cooling. Different types of cooling systems have different cooling efficiencies and costs. Therefore, when choosing a cooling system, you need to consider factors such as heat dissipation requirements, cost, and reliability.

[0073] Cooling medium and flow rate: The type and flow rate of cooling medium will also affect the heat dissipation effect. For example, using a coolant with high thermal conductivity can improve the heat dissipation efficiency; increasing the flow rate of the coolant can also accelerate the heat dissipation.

[0074] Radiator area and layout: The area and layout of the radiator are also important factors affecting the heat dissipation effect. Reasonable design of the radiator area and layout can ensure that the heat can be quickly dissipated into the air.

[0075] Air conditioning system heat dissipation requirements: Automobile air conditioning system manufacturers usually provide specifications and standards for heat dissipation requirements. These specifications are based on a large amount of experimental data and engineering experience, and can provide an important reference for obtaining heat dissipation requirements.

[0076] Obtaining the heat dissipation requirements of the automotive air conditioning system requires comprehensive consideration of the air conditioning system composition and working principle, vehicle use environment and working conditions, air conditioning system performance and efficiency, and experimental and simulation analysis. In actual applications, adjustments and optimizations are also required according to specific circumstances to ensure that the air conditioning system can operate efficiently and stably.

[0077] In this embodiment, the current cabin cooling demand = Max (engine cooling demand, electric drive cooling demand, air conditioning system cooling demand, fan cooling demand), that is, the cabin cooling demand is met, and the current cabin cooling demand is corrected in combination with the vehicle speed and the outside temperature. According to the corrected current cabin cooling demand, the target opening of the AGS is obtained, that is, the AGS gear position = Max (engine, electric drive, air conditioning system, fan demand) + vehicle speed, correction value of the outside temperature, where:

[0078] Engine demand = Max (engine coolant temperature, transmission oil temperature);

[0079] Electric drive demand = Max (motor inlet water temperature demand, DPEU cooling demand, PDU cooling demand, over-temperature protection demand);

[0080] Air conditioning system demand = Max (cooling demand, when the passenger compartment is cooled or the battery is cooled, the compressor is turned on, and the AGS gear position is determined according to the high pressure of the air conditioning system);

[0081] Fan demand is the fan duty cycle demand for AGS gear;

[0082] Vehicle speed and outside temperature correction:

[0083] Table 1 The effect of vehicle speed and outside temperature on AGS gear position correction

[0084]

[0085] In this example, the cabin heat dissipation demand information under the whole vehicle working condition is called as the cabin temperature signal. When the temperature reaches the threshold range, the gear control AGS opening needs to be adjusted.

[0086] In S120, the current feedback voltage of the actuator contact position is the voltage corresponding to the position of the contact of the brush motor of the AGS actuator. The voltage feedback principle of the actuator is as follows: Figure 3 shown.

[0087] In this embodiment, the AGS actuator has a built-in carbon film brushed DC motor. The carbon film contacts have different output voltages at different positions. The different output voltages result in different output powers of the brushed DC motor, which in turn affects the opening of the AGS.

[0088] In S130, the current target position voltage is determined according to the target opening. This embodiment requires setting a correspondence table, which is set in the vehicle system. When adjusting the gear position (opening) of the AGS, the correspondence table is called to convert the opening into voltage.

[0089] The corresponding relationship table is set as follows:

[0090] In this embodiment, 7 gears are temporarily set, and different gears correspond to different openings, as shown in Table 2.

[0091] First, after the vehicle is powered on, AGS needs to complete self-learning: VIU drives AGS to close to the fully closed stall position, records the feedback voltage V fully closed, and the corresponding gear is state 0; then VIU drives AGS to open to the fully open stall position, records the feedback voltage V fully open, and the corresponding gear is state 6; after completing the self-learning process; the feedback voltages of states 1-5 are linearly interpolated according to states 0 and 6; the AGS gear opening error is ±5°; and the corresponding feedback voltages when the five AGS openings are between 0% and 100% are obtained.

[0092] The details are shown in Table 2.

[0093] Table 2 Correspondence table

[0094]

[0095] The difference between the current target position voltage and the current feedback voltage can be used to obtain the amplitude of the AGS opening that needs to be corrected, and then the AGS motor is driven clockwise, counterclockwise or stopped according to the difference.

[0096] For example, according to the corrected current cabin cooling demand, the target opening is 60. According to Table 2, without considering the error, the feedback voltage when the target opening is 60 should be 3.26, that is, the current target position voltage is 3.26V. If it is detected that the current feedback voltage is less than 3.26V, that is, the current opening does not reach the target opening, the motor is rotated clockwise, otherwise it is rotated counterclockwise. When the target opening is just met, that is, the difference is 0, the motor is stopped to achieve precise control of the AGS.

[0097] Please refer to Figure 4 The present application also provides a control device for an active air intake grille of an automobile, the control device comprising at least one software function module that can be stored in a storage module or fixed in an operating system (OS) in the form of software or firmware. The processing module is used to execute the executable modules stored in the storage module, such as the software function modules and computer programs included in the control system of the active air intake grille of an automobile.

[0098] The control device includes a control module 1, a collection module 2 and an adjustment module 3. The functions of each unit may be as follows:

[0099] The control module 1 is configured to control the opening of the AGS to a target opening according to the current cabin cooling demand;

[0100] The acquisition module 2 is configured to acquire the current feedback voltage of the brush motor contact position of the AGS;

[0101] The adjustment module 3 is configured to compare the current feedback voltage with the current target position voltage, and adjust the opening of the AGS according to the comparison result, wherein the current target position voltage is obtained according to the target opening.

[0102] The acquisition module 2 is further configured to search for a target voltage corresponding to the target opening in a correspondence table according to the target opening, and the correspondence table includes a plurality of mapping groups of different target openings and target voltages.

[0103] The control module 1 is further configured to correct the current engine compartment cooling demand according to the vehicle speed and the outside temperature, and control the opening of the AGS to a target opening according to the corrected current engine compartment cooling demand.

[0104] The control module 1 is further configured to obtain the current cabin cooling demand according to the cooling demand parameter, and the cooling demand parameter includes at least one of the engine cooling demand, the electric drive cooling demand, the air conditioning system cooling demand and the fan demand. The control module 1 is further configured to obtain the current cabin cooling demand according to the maximum value of the engine cooling demand, the electric drive cooling demand, the air conditioning system cooling demand and the fan demand.

[0105] In this embodiment, the processing module may be an integrated circuit chip having the ability to process signals. The above-mentioned processing module may be a general-purpose processor. For example, the processor may be a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and may implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0106] The storage module may be, but is not limited to, a random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, etc. In this embodiment, the storage module may also be used to store a program, and the processing module executes the program after receiving the execution instruction.

[0107] Understandably, Figure 1 The server structure shown in FIG. 1 is only a schematic diagram of a structure. The server may also include Figure 1 More components are shown. Figure 1 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0108] It should be noted that those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the server described above can refer to the corresponding process of each step in the aforementioned method, and will not be elaborated here.

[0109] The embodiment of the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is run on a computer, the computer executes the control method of the active air intake grille of the automobile as described in the above embodiment.

[0110] Through the description of the above implementation methods, technical personnel in this field can clearly understand that the present application can be implemented by hardware, and can also be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each implementation scenario of the present application.

[0111] In the embodiments provided in the present application, it should be understood that the disclosed system and method can also be implemented in other ways. The system and method embodiments described above are merely schematic, for example, the flow charts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the systems, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a part of a module, a program segment or a code, and a part of the module, program segment or code includes one or more executable instructions for implementing the specified logical function. It should also be noted that each box in the block diagram and / or the flow chart, and the combination of the boxes in the block diagram and / or the flow chart can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0112] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method for an active air intake grille of an automobile, characterized in that: The method comprises: According to the current cabin heat dissipation requirements, the opening of the active air intake grille is controlled to the target opening; Collect the current feedback voltage of the brush motor contact position of the active air intake grille; The current feedback voltage is compared with the current target position voltage, and the opening of the active air intake grille is adjusted according to the comparison result, wherein the current target position voltage is obtained according to the target opening.

2. The method according to claim 1, characterized in that Before comparing the current feedback voltage with the current target position voltage, the method further includes: Acquire a corresponding relationship table, wherein the corresponding relationship table includes a mapping group of multiple groups of different target openings and corresponding target voltages; According to the target opening, a target voltage corresponding to the target opening is searched in a correspondence table.

3. The method according to claim 2, characterized in that The obtaining of the correspondence table comprises: Collecting a first feedback voltage and a second feedback voltage, wherein the first feedback voltage represents a feedback voltage corresponding to a position of an actuator contact piece of the active air intake grille when the active air intake grille is fully closed, and the second feedback voltage represents a feedback voltage corresponding to a position of an actuator contact piece of the active air intake grille when the active air intake grille is fully opened; According to the first feedback voltage, the second feedback voltage and a preset mathematical algorithm, a plurality of third feedback voltages are obtained, wherein the third feedback voltages represent feedback voltages corresponding to when the opening of the active air intake grille is between fully open and fully closed.

4. The method according to claim 1, characterized in that: The adjusting the opening of the active air intake grille according to the comparison result includes: when the difference between the current feedback voltage and the current target voltage is not 0, driving the brushed motor of the active air intake grille to rotate clockwise or counterclockwise according to the difference.

5. The method according to claim 1, characterized in that According to the current cabin heat dissipation requirement, controlling the opening of the active air intake grille to a target opening includes: Obtaining a current cabin cooling demand according to a cooling demand parameter, wherein the cooling demand parameter includes at least one of an engine cooling demand, an electric drive cooling demand, an air conditioning system cooling demand, and a fan demand; Correct the current cabin cooling demand based on vehicle speed and outside temperature; According to the corrected current cabin cooling demand, the opening of the active air intake grille is controlled to a target opening.

6. The method according to claim 5, characterized in that: The obtaining of the current cabin heat dissipation demand according to the heat dissipation demand parameter includes: The current cabin cooling demand is obtained according to the maximum value of the engine cooling demand, the electric drive cooling demand, the air conditioning system cooling demand and the fan demand.

7. The method according to claim 3, characterized in that: The preset mathematical algorithm is an interpolation operation.

8. A control device for an active air intake grille of an automobile, characterized in that: include: a control module configured to control the opening of the active air intake grille to a target opening according to a current cabin heat dissipation requirement; A collection module configured to collect a current feedback voltage of a brush motor contact position of an active air intake grille; The adjustment module is configured to compare the current feedback voltage with the current target position voltage, and adjust the opening of the active air intake grille according to the comparison result, wherein the current target position voltage is obtained according to the target opening.

9. A server, characterized in that: The server comprises a processor and a memory coupled to each other, wherein a computer program is stored in the memory. When the computer program is executed by the processor, the server executes the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 7.

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