Method, device, electronic equipment and medium for determining the opening of active air intake grille

Abstract

The present invention relates to a method, device, electronic device, and medium for determining the opening of an active air intake grille. The method includes: determining the required heat dissipation power of the entire vehicle based on the current vehicle speed, current opening, vehicle acceleration, required passenger compartment temperature, and required power battery temperature; determining the pre-adjusted opening based on the vehicle's required heat dissipation power, a first pre-adjusted cooling water flow rate, and the current vehicle speed; obtaining a second pre-adjusted cooling water flow rate based on the first pre-adjusted cooling water flow rate; determining a combination of vehicle required power variations based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted opening, the first and second pre-adjusted cooling water flows, and the power limits of the cooling fan and cooling water pump for the entire vehicle's NVH at the current vehicle speed; and determining the required air intake grille opening based on the minimum value of the combination of vehicle required power variations. The present invention can achieve combined control of the active air intake grille opening to meet multiple requirements in terms of heat dissipation, wind resistance, energy consumption, comfort, and NVH.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control, and in particular to a method, device, electronic equipment and medium for determining the opening of an active air intake grille. Background Art

[0002] The active grille shutter (AGS) has become the main device for optimizing vehicle wind resistance and heat dissipation performance. However, in the process of overall vehicle performance design, more requirements are also put forward for the working scenarios of the active grille. It is necessary to maintain the minimum opening to reduce wind resistance, and to maintain the natural air intake volume at the maximum opening to meet the heat dissipation requirements of the power system and air-conditioning system. At the same time, it is necessary to avoid frequent operation of the active grille to reduce its service life. This requires the active grille to maintain the optimal opening in different vehicle environments and different operating conditions.

[0003] Existing active air intake grille control strategies generally only consider heat dissipation, energy consumption or wind resistance, and lack a joint control method to fully meet the multiple needs of heat dissipation, wind resistance, energy consumption, comfort and NVH.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, device, electronic equipment and medium for determining the opening of an active air intake grille, so as to achieve joint control of the opening of the active air intake grille that meets multiple requirements of heat dissipation, wind resistance, energy consumption, comfort and NVH.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a method for determining the required heat dissipation power of a vehicle based on the current vehicle speed, the current active air intake grille opening, the vehicle acceleration, the required passenger compartment temperature, and the required power battery temperature;

[0008] determining a pre-adjusted active air intake grille opening according to the vehicle heat dissipation demand power, the first pre-adjusted cooling water flow rate, and the current vehicle speed;

[0009] Obtaining a second pre-adjusted cooling water flow rate according to the current cooling water flow rate;

[0010] Determining a vehicle power requirement change combination based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, a vehicle NVH power limit for the cooling fan at the current vehicle speed, and a vehicle NVH power limit for the cooling water pump at the current vehicle speed;

[0011] The required air intake grille opening is determined according to the minimum value of the combination of the required power changes of the entire vehicle.

[0012] In a second aspect, the present invention provides a device for determining the opening of an active air intake grille, comprising: a vehicle heat dissipation power requirement module, configured to determine the vehicle heat dissipation power requirement based on the current vehicle speed, the current active air intake grille opening, the vehicle acceleration, the passenger compartment temperature requirement, and the power battery temperature requirement;

[0013] a pre-adjusted active air intake grille opening determination module, configured to determine the pre-adjusted active air intake grille opening according to the vehicle heat dissipation demand power, the first pre-adjusted cooling water flow rate, and the current vehicle speed;

[0014] a second pre-regulated cooling water flow acquisition module, configured to acquire a second pre-regulated cooling water flow according to the current cooling water flow;

[0015] a vehicle power requirement change combination determination module, configured to determine a vehicle power requirement change combination based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the vehicle NVH power limit for the cooling fan at the current vehicle speed, and the vehicle NVH power limit for the cooling water pump at the current vehicle speed;

[0016] The required air intake grille opening determination module is used to determine the required air intake grille opening according to the minimum value of the combination of the required power changes of the whole vehicle.

[0017] In a third aspect, the present invention provides an electronic device, comprising:

[0018] at least one processor, and a memory communicatively coupled to the at least one processor;

[0019] The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to perform the above method.

[0020] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are used to enable the computer to execute the above method.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The method for determining the active grille opening provided by the present invention considers the required passenger compartment temperature, the driver's driving intent (i.e., vehicle acceleration), and the heat dissipation requirements of the power battery, thereby deriving a vehicle heat dissipation power requirement. This vehicle heat dissipation power requirement combines the heat dissipation requirements of the drive system (determined by the current vehicle speed, the current active grille opening, and vehicle acceleration) and the heat dissipation requirements of the air conditioning system (determined by the required passenger compartment temperature and the required power battery temperature). A pre-adjusted active grille opening is then determined based on the vehicle heat dissipation power requirement, a first pre-adjusted cooling water flow rate, and the current vehicle speed. This pre-adjusted active grille opening is used to calculate the subsequent change in vehicle power requirement. This opening satisfies both the heat dissipation requirements and the minimum wind resistance requirement, resulting in the lowest wind resistance at this opening. Then, based on the current cooling water flow rate, obtain the second pre-adjusted cooling water flow rate; based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the power limit of the cooling fan for the whole vehicle NVH at the current vehicle speed, and the power limit of the cooling water pump for the whole vehicle NVH at the current vehicle speed (NVH requirements are taken into account here), determine the required power change of the whole vehicle; based on the required power change of the whole vehicle, determine the required air intake grille opening. The present invention pre-adjusts the active air intake grille opening and / or the cooling water flow rate. Any of the pre-adjusted parameters will affect the required power change of the whole vehicle, thereby forming a combination of required changes of the whole vehicle. The minimum value in the combination of required changes of the whole vehicle represents the lowest energy consumption of the vehicle, and the air intake grille opening corresponding to the minimum value is determined to be the required air intake grille opening. The above method for determining the opening of the active air intake grille is based on the perspective of the optimal performance combination of the entire vehicle, meeting the requirements of different professions for the opening of the active air intake grille, such as heat dissipation performance, wind resistance, energy consumption, air conditioning comfort, NVH, etc., so that the grille is maintained at the optimal opening. The optimal opening is determined at one time, without the need for repeated debugging, reducing the frequent movement of the grille and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a flow chart of a method for determining the opening of an active air intake grille in the present invention;

[0025] Figure 2 This is a flow chart for determining the required heat dissipation power of the entire vehicle in the present invention;

[0026] Figure 3 This is a flow chart for determining a combination of power variation requirements for a vehicle in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the device for determining the opening of the active air intake grille in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the electronic device in the present invention. DETAILED DESCRIPTION

[0029] The following description of exemplary embodiments of the present application is made in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0030] It should be noted that:

[0031] The determination method of the present invention comprehensively considers the heat dissipation requirements of the drive system and the air conditioning system. The drive system dissipates heat through the combined action of a high-temperature radiator and a low-temperature radiator, while the air conditioning system dissipates heat through the condenser. The heat dissipation power of the high-temperature and low-temperature radiators is related to the drive power, while the heat dissipation power of the condenser is related to the required passenger compartment temperature and the required power battery temperature. Changing at least one of the heat dissipation power of the high-temperature radiator, the low-temperature radiator, or the condenser can alter the vehicle's heat dissipation.

[0032] Q1 = C1m1ΔT1, where Q1 is the air-side cooling power, C1 is the specific heat of the air, m1 is the total air volume, and ΔT1 is the temperature rise of the air entering and exiting the cooling system. Q2 = C2m2ΔT2, where Q2 is the water-side cooling power, C2 is the specific heat of the water, m2 is the water flow rate, and ΔT2 is the temperature rise of the cooling water after passing through the cooling system. The air-side cooling power equals the water-side cooling power, which in turn equals the vehicle's required cooling power. The vehicle's required cooling power is the maximum of the condenser cooling power, the high-temperature radiator cooling power, and the low-temperature radiator cooling power.

[0033] During heat dissipation, the cooling water cools down the heat source (power element) and then takes away the heat through the high-temperature radiator, low-temperature radiator and condenser air intake to achieve final heat dissipation. When changing the heat dissipation of the vehicle at the current speed, there are two ways to do it (the following is explained by taking acceleration, that is, the current speed is increased relative to the previous speed, as an example): 1. First, pre-increase the cooling water flow rate so that the heat dissipation power on the water side is equal to the heat dissipation power required by the vehicle. The cooling water flow rate is related to the cooling water pump power. When the cooling water flow rate changes, the cooling water pump power changes at the same time. Then, further pre-increase the total air intake volume so that the heat dissipation power on the wind side is equal to the heat dissipation power required by the vehicle. The total air intake volume consists of natural air intake volume and forced air intake volume. The natural air intake volume is related to the opening of the active air intake grille, and the forced air intake volume is related to the cooling fan power. When pre-adjusting the total air intake volume, first pre-increase the opening of the active air intake grille. Increasing the opening of the active air intake grille can increase the natural air intake volume, and the natural air intake volume will affect the driving power, thereby increasing the driving power. At the same time, the increase in the opening of the active air intake grille may also change the forced air intake volume. And then change the cooling fan power; 2. Keep the opening of the active air intake grille unchanged, that is, maintain the opening before the current vehicle speed, and then pre-adjust the cooling water flow to increase it slightly. At the same time, ΔT2 will also increase, so that the heat dissipation power on the water side is equal to the vehicle's heat dissipation demand power. As ΔT2 increases, the heat transferred from the water side to the wind side will increase, and ΔT1 will inevitably increase. If ΔT1 is large enough to make the heat dissipation power on the wind side equal to the vehicle's heat dissipation demand power, there is no need to pre-increase the total air intake volume. If ΔT1 is not large enough to make the heat dissipation power on the wind side equal to the vehicle's heat dissipation demand power, it is necessary to pre-increase the total air intake volume. When pre-adjusting the total air intake volume, first pre-increase the opening of the active air intake grille. Increasing the opening of the active air intake grille can increase the natural air intake volume, and the natural air intake volume will affect the driving power, thereby increasing the driving power. At the same time, the increase in the opening of the active air intake grille may also change the forced air intake volume, thereby changing the cooling fan power. The above two methods also need to consider the NVH power requirements of the cooling fan and cooling water pump at the current vehicle speed. Therefore, further adjustment of the active air intake grille opening and / or cooling water flow may be involved in the future. Please refer to the following description for details. In this way, when the vehicle heat dissipation condition is changed at the current vehicle speed, the change value of the vehicle power requirement can be obtained (i.e., the sum of the drive power change value, the cooling fan power change value, and the cooling water pump power change value). When the change value of the vehicle power requirement is minimum, it means that the energy consumption of the vehicle is minimum and the vehicle endurance is maximum. The present invention selects the opening corresponding to the minimum value of the vehicle power requirement as the required active air intake grille opening.

[0034] Example 1

[0035] Figure 1This is a flow chart of a method for determining the opening of an active air intake grille, provided in this embodiment. This embodiment is applicable to determining the opening of an active air intake grille while a vehicle is in motion. This method can be performed by an apparatus for determining the opening of an active air intake grille, which can be composed of software and / or hardware and is typically integrated into an electronic device.

[0036] like Figure 1 As shown, this embodiment provides a method for determining the opening of an active air intake grille, comprising the following steps:

[0037] S110 , determining a required cooling power for the entire vehicle based on the current vehicle speed, the current active air intake grille opening, the vehicle acceleration, the required passenger compartment temperature, and the required power battery temperature.

[0038] "Vehicle acceleration" refers to the vehicle's acceleration within a set timeframe. The "Required passenger compartment temperature" is typically determined by the driver, who can preset it in the vehicle's computer system or change it based on their own needs, such as on the computer system. Of course, the required passenger compartment temperature can also be determined jointly by other passengers and the driver. For example, a display screen can be provided in front of the rear passengers for changing the required passenger compartment temperature. If the driver and passengers set different temperatures, a priority can be set. The "Required power battery temperature" refers to the optimal temperature the power battery must maintain to maintain normal operation.

[0039] Preferably, if Figure 2 As shown, the determination of the vehicle heat dissipation power requirement based on the current vehicle speed, the current active air intake grille opening, the vehicle acceleration, the passenger compartment temperature requirement, and the power battery temperature requirement includes:

[0040] S1011, determining a current driving power based on a current vehicle speed, a current active air intake grille opening, and vehicle acceleration;

[0041] S1012, determining a heat dissipation power of a high-temperature radiator and a heat dissipation power of a low-temperature radiator according to the current driving power;

[0042] S1013. Determine the condenser heat dissipation power based on the passenger compartment required temperature and the power battery required temperature;

[0043] S1014: Determine the required heat dissipation power of the entire vehicle according to the heat dissipation power of the high-temperature radiator, the heat dissipation power of the low-temperature radiator, and the heat dissipation power of the condenser.

[0044] Among them, the high-temperature radiator refers to the radiator for dissipating heat for the engine, and the low-temperature radiator refers to the radiator for dissipating heat for the motor system.

[0045] It should be noted that driving power P = F × u, where F is the driving resistance and u is the vehicle speed.w +F j +F i +F f , where F w is the wind resistance, F j is the acceleration resistance, F i is the slope resistance, F f is the rolling resistance. w =C d Au / 21.15,C d is the air resistance coefficient, A is the frontal area (i.e. the projected area in the direction of the car's travel), where C d It is related to the opening of the active air intake grille. Through simulation calculation, it is found that under different openings, C d The value is different (usually 2.85~2.95), C under different openings d The value is preset in the device for determining the opening of the active air intake grille. j =δma, δ is the rotation mass conversion factor, m is the vehicle mass, and a is the acceleration. i =mgsinα, g is the gravitational acceleration constant, α is the road slope angle. f =mgfcosα, f is the rolling resistance coefficient.

[0046] According to the above formula, the current driving power can be calculated using the current vehicle speed, the current active air intake grille opening, and the vehicle acceleration as inputs. The high-temperature radiator heat dissipation power and the low-temperature radiator heat dissipation power are then determined based on the current driving power. The specific determination method can be adopted using existing methods and is not specifically limited by the present invention. For example, the engine heat dissipation power can be obtained by multiplying the driving power by a set coefficient (e.g., 0.6). The engine heat dissipation power corresponds to the high-temperature radiator power. The speed ratio is calculated based on the vehicle speed and wheel diameter, and then the motor speed and motor efficiency are calculated. Combining the driving power and efficiency, the motor system heat dissipation power is obtained, which corresponds to the low-temperature radiator power.

[0047] Furthermore, determining the condenser heat dissipation power based on the passenger compartment temperature requirement and the power battery temperature requirement includes: determining the cockpit cooling / heating power requirement based on the passenger compartment temperature requirement, and determining the power battery cooling power based on the power battery temperature requirement; calculating the sum of the cockpit cooling / heating power requirement and the power battery cooling power to obtain the total air conditioning system power requirement; calculating the compressor power requirement based on the total air conditioning system power requirement and the air conditioning system energy efficiency ratio; and calculating the condenser heat dissipation power by summing the total air conditioning system power requirement and the compressor power requirement. Generally speaking, the air conditioning system energy efficiency ratio is 2.1-2.3, the compressor power requirement is 2-3kW, and the condenser heat dissipation power is approximately 10kW.

[0048] Furthermore, the maximum value of the heat dissipation power of the high-temperature radiator, the heat dissipation power of the low-temperature radiator, and the heat dissipation power of the condenser is taken as the heat dissipation power requirement of the entire vehicle.

[0049] S120 : Determine a pre-adjusted active air intake grille opening according to the vehicle heat dissipation demand power, the first pre-adjusted cooling water flow rate, and the current vehicle speed.

[0050] The first pre-adjusted cooling water flow rate refers to the cooling water flow rate calculated when the above ΔT2 remains unchanged under the vehicle heat dissipation demand power, and the flow rate is a preset water flow rate.

[0051] Preferably, determining the pre-adjusted active air intake grille opening according to the vehicle heat dissipation demand power, the first pre-adjusted cooling water flow rate, and the current vehicle speed includes:

[0052] determining a total air intake volume according to the vehicle heat dissipation demand power and the first pre-adjusted cooling water flow rate;

[0053] A pre-adjusted active air intake grille opening is determined according to the total air intake volume and the current vehicle speed.

[0054] Specifically, when determining the total air intake volume, the current cooling water flow rate (the current cooling water flow rate refers to the cooling water flow rate before vehicle speed adjustment, i.e., the cooling water flow rate before the current vehicle speed) is first predetermined as a first pre-adjusted cooling water flow rate. Combined with the vehicle's required heat dissipation power, the total air intake volume is obtained, which is the maximum of the required air intake volume for the high-temperature radiator, the required air intake volume for the low-temperature radiator, and the required air intake volume for the condenser. A pre-adjusted active air intake grille opening is then determined based on the total air intake volume and the current vehicle speed. The active air intake grille opening for a specific total air intake volume and specific vehicle speed can be pre-calibrated and preset in the active air intake grille opening determination device. This pre-adjusted active air intake grille opening is minimum at the first pre-adjusted cooling water flow rate, thereby minimizing the vehicle's wind resistance.

[0055] S130. Obtain a second pre-adjusted cooling water flow rate according to the current cooling water flow rate.

[0056] The second pre-adjusted cooling water flow rate can be preset in the active air intake grille opening determination device, and its value is related to the current cooling water flow rate. For example, based on the current cooling water flow rate value, the value can be increased or decreased by a certain proportion to obtain a set of second pre-adjusted cooling water flow rate values.

[0057] S140. Determine a combination of vehicle power requirement changes based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the vehicle NVH power limit for the cooling fan at the current vehicle speed, and the vehicle NVH power limit for the cooling water pump at the current vehicle speed.

[0058] Specifically, the device for determining the active grille opening can preset vehicle NVH power limits for the cooling fan and cooling water pump at different vehicle speeds. These required values represent the maximum cooling fan and cooling water pump power values required to meet the vehicle NVH requirements. If these maximum values are exceeded, the cooling fan and cooling water pump speeds will be too high, resulting in excessive noise and failing to meet the vehicle NVH requirements. Because there is a first pre-adjusted water flow rate and a second pre-adjusted cooling water flow rate, and the second pre-adjusted cooling water flow rate is a set of values, and the two methods mentioned above affect the vehicle power requirement change, a set of vehicle power requirement change values, i.e., a vehicle power requirement change combination, can be obtained.

[0059] Preferably, if Figure 3 As shown, the combination of determining the vehicle required power change amount based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the vehicle NVH power limit for the cooling fan at the current vehicle speed, and the vehicle NVH power limit for the cooling water pump at the current vehicle speed includes:

[0060] S1041, determining a driving power change value based on the current vehicle speed, the current active air intake grille opening, and the pre-adjusted active air intake grille opening;

[0061] S1042: Determine a pre-adjusted forced air intake volume based on the current vehicle speed and the pre-adjusted active air intake grille opening;

[0062] S1043: Determine a cooling fan power change value based on the pre-adjusted forced air volume and the vehicle NVH power limit for the cooling fan at the current vehicle speed;

[0063] S1044: Determine a cooling water pump power change value based on the first pre-adjusted cooling water flow rate and the vehicle NVH power limit for the cooling water pump at the current vehicle speed, or based on the second pre-adjusted cooling water flow rate and the vehicle NVH power limit for the cooling water pump at the current vehicle speed;

[0064] S1045 : Determine a combination of required power changes for the entire vehicle based on the driving power change value, the cooling fan power change value, and the cooling water pump power change value.

[0065] When the active air intake grille opening changes, the driving power will also change accordingly. Therefore, in this preferred embodiment, the driving power change value is first determined based on the current vehicle speed, the current active air intake grille opening and the pre-adjusted active air intake grille opening.

[0066] Furthermore, determining the pre-adjusted forced air intake volume according to the current vehicle speed and the pre-adjusted active air intake grille opening includes:

[0067] determining a pre-adjusted natural air intake volume according to the current vehicle speed and the pre-adjusted active air intake grille opening;

[0068] The pre-adjusted forced air intake volume is determined according to the total air intake volume and the pre-adjusted natural air intake volume.

[0069] The present invention does not specifically limit the specific calculation method for determining the pre-adjusted natural air intake volume based on the current vehicle speed and the pre-adjusted active air intake grille opening, and a commonly used method in the present invention can be used. Pre-adjusted forced air intake volume = total air intake volume - pre-adjusted natural air intake volume.

[0070] Preferably, determining the cooling fan power change value according to the pre-adjusted forced air intake volume and the power limit of the cooling fan imposed by the vehicle NVH at the current vehicle speed includes:

[0071] determining a pre-adjusted cooling fan power according to the pre-adjusted forced air inlet volume;

[0072] Determining a cooling fan power change value according to the pre-adjusted cooling fan power and the vehicle NVH power limit for the cooling fan at the current vehicle speed;

[0073] The determining of the cooling water pump power change value based on the first pre-adjusted cooling water flow rate and the vehicle NVH power limit for the cooling water pump at the current vehicle speed, or the second pre-adjusted cooling water flow rate and the vehicle NVH power limit for the cooling water pump at the current vehicle speed, includes:

[0074] determining a pre-adjusted cooling water pump power according to the first pre-adjusted cooling water flow rate;

[0075] Determining a cooling water pump power change value based on the pre-adjusted engine cooling water pump power and the power limit of the cooling water pump for the vehicle NVH at the current vehicle speed;

[0076] or determining the pre-adjusted cooling water pump power according to the second pre-adjusted cooling water flow rate;

[0077] The cooling water pump power change value is determined based on the pre-adjusted engine cooling water pump power and the power limit of the cooling water pump imposed by the vehicle NVH at the current vehicle speed.

[0078] Preferably, determining the cooling fan power change value according to the pre-adjusted cooling fan power and the power limit of the cooling fan imposed by the vehicle NVH at the current vehicle speed includes:

[0079] Take the first smaller value between the pre-adjusted cooling fan power and the power limit of the cooling fan for the vehicle NVH at the current vehicle speed, and calculate a first difference between the first smaller value and the current cooling fan power, where the first difference is the cooling fan power change value.

[0080] If the first smaller value is the pre-adjusted cooling fan power, the pre-adjusted forced air intake volume remains unchanged. If the first smaller value is the cooling fan power limit for vehicle NVH at the current speed, the pre-adjusted forced air intake volume needs to be further reduced to the second pre-adjusted forced air intake volume to meet NVH requirements. Furthermore, since the total air intake volume has been determined, the active air intake grille opening needs to be increased to increase the natural air intake volume.

[0081] Preferably, determining the cooling water pump power change value according to the pre-adjusted cooling water pump power and the power limit of the cooling water pump imposed by the vehicle NVH at the current vehicle speed includes:

[0082] Take the second smaller value between the pre-adjusted cooling water pump power and the power limit of the cooling water pump for the whole vehicle NVH at the current vehicle speed, calculate the second difference between the second smaller value and the current cooling water pump power, and the second difference is the cooling water pump power change value.

[0083] If the second smaller value is the pre-adjusted cooling water pump power, the second pre-adjusted cooling water flow rate remains unchanged. If the second smaller value is the power limit of the cooling water pump for the vehicle NVH at the current vehicle speed, the second pre-adjusted cooling water flow rate must be further reduced to a third pre-adjusted cooling water flow rate (selected from the set of second pre-adjusted cooling water flow rate values in S130) to meet the NVH requirements. At this time, in order to meet the vehicle's heat dissipation and power requirements, the total air intake volume needs to be increased. The situation of increasing the total air intake volume has been explained above and will not be repeated here.

[0084] In this embodiment, the driving power change value, the cooling fan power change value, and the cooling water pump power change value are summed to obtain a combination of vehicle required power change values.

[0085] S150: Determine the required air intake grille opening according to the minimum value of the combination of required vehicle power changes.

[0086] Since the aforementioned steps have already taken into account the four aspects of heat dissipation, air conditioning comfort, wind resistance and NVH, and ensured that these four aspects are the optimal solutions under various conditions, the air intake grille opening corresponding to the minimum value in the combination of vehicle required power changes is finally used as the required air intake grille opening, which can optimize heat dissipation, air conditioning comfort, wind resistance, NVH and energy consumption, and meet the requirements of the above-mentioned professional disciplines for the active air intake grille opening.

[0087] The above-mentioned method for determining the active grille opening considers the required passenger compartment temperature, the driver's driving intent (i.e., vehicle acceleration), and the heat dissipation requirements of the power battery, thereby deriving the vehicle's required heat dissipation power. This required heat dissipation power integrates the heat dissipation requirements of the drive system (determined by the current vehicle speed, the current active grille opening, and vehicle acceleration) and the heat dissipation requirements of the air conditioning system (determined by the required passenger compartment temperature and the required power battery temperature). A pre-adjusted active grille opening is then determined based on the vehicle's required heat dissipation power, the first pre-adjusted cooling water flow rate, and the current vehicle speed. This pre-adjusted active grille opening is used to calculate the subsequent change in vehicle required power. This opening satisfies both the heat dissipation requirements and the minimum wind resistance requirement, resulting in the lowest wind resistance. Then, based on the current cooling water flow rate, obtain the second pre-adjusted cooling water flow rate; based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the power limit of the cooling fan for the whole vehicle NVH at the current vehicle speed, and the power limit of the cooling water pump for the whole vehicle NVH at the current vehicle speed (NVH requirements are taken into account here), determine the required power change of the whole vehicle; based on the required power change of the whole vehicle, determine the required air intake grille opening. The present invention pre-adjusts the active air intake grille opening and / or the cooling water flow rate. Any of the pre-adjusted parameters will affect the required power change of the whole vehicle, thereby forming a combination of required changes of the whole vehicle. The minimum value in the combination of required changes of the whole vehicle represents the lowest energy consumption of the vehicle, and the air intake grille opening corresponding to the minimum value is determined to be the required air intake grille opening. The above method for determining the opening of the active air intake grille is based on the perspective of the optimal performance combination of the entire vehicle, meeting the requirements of different professions for the opening of the active air intake grille, such as heat dissipation performance, wind resistance, energy consumption, air conditioning comfort, NVH, etc., so that the grille is maintained at the optimal opening. The optimal opening is determined at one time, without the need for repeated debugging, reducing the frequent movement of the grille and increasing its service life.

[0088] Furthermore, after determining the pre-adjusted active air intake grille opening according to the vehicle heat dissipation demand power, the first pre-adjusted cooling water flow rate and the current vehicle speed, the method further includes:

[0089] determining a wind resistance change value based on the pre-adjusted active air intake grille opening and the current vehicle speed;

[0090] determining a change value of acceleration resistance according to the vehicle acceleration;

[0091] When it is determined that the wind resistance change value is less than a first preset value, or the acceleration resistance change value is less than a second preset value, determining the active air intake grille opening is stopped.

[0092] The first preset value is, for example, current wind resistance × 5%, and the second preset value is, for example, current acceleration resistance × 3%. After determining the pre-adjusted active air intake grille opening, this embodiment further determines the wind resistance change value and the acceleration resistance change value. If either of the two meets the set adjustment, determining the active air intake grille opening is stopped, i.e., the current active air intake grille opening is maintained unchanged. This further reduces frequent changes in the opening.

[0093] Example 2

[0094] like Figure 4 As shown, this embodiment provides a device for determining the opening of an active air intake grille, comprising:

[0095] The vehicle heat dissipation power requirement module 101 is used to determine the vehicle heat dissipation power requirement based on the current vehicle speed, the current active air intake grille opening, the vehicle acceleration, the passenger compartment temperature requirement, and the power battery temperature requirement;

[0096] a pre-adjusted active air intake grille opening determination module 102, configured to determine a pre-adjusted active air intake grille opening according to the vehicle heat dissipation power requirement, the first pre-adjusted cooling water flow rate, and the current vehicle speed;

[0097] A second pre-adjusted cooling water flow acquisition module 103 is configured to acquire a second pre-adjusted cooling water flow according to the current cooling water flow;

[0098] a vehicle power requirement change combination determination module 104, configured to determine a vehicle power requirement change combination based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the vehicle NVH power limit for the cooling fan at the current vehicle speed, and the vehicle NVH power limit for the cooling water pump at the current vehicle speed;

[0099] The required air intake grille opening determination module 105 is configured to determine the required air intake grille opening according to the minimum value of the combination of required vehicle power variations.

[0100] The device is used to execute the above method, and thus has at least functional modules and beneficial effects corresponding to the above method.

[0101] Example 3

[0102] like Figure 5 As shown, this embodiment provides an electronic device, including:

[0103] at least one processor; and

[0104] a memory communicatively connected to at least one of the processors; wherein,

[0105] The memory stores instructions executable by at least one processor, and the instructions are executed by at least one processor to enable at least one processor to perform the above method. The at least one processor in the electronic device is capable of performing the above method, thereby having at least the same advantages as the above method.

[0106] Optionally, the electronic device also includes an interface for connecting various components, including a high-speed interface and a low-speed interface. The various components are connected to each other using different buses and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on a memory to display graphical information of a GUI (Graphical User Interface) on an external input / output device (such as a display device coupled to an interface). In other embodiments, if necessary, multiple processors can be used together with multiple memories, and / or multiple buses can be used together with multiple memories. Similarly, multiple electronic devices can be connected (for example, as a server array, a group of blade servers, or a multi-processor system), and each device provides some necessary operations. Figure 5 A processor 201 is taken as an example.

[0107] Memory 202, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the method for determining the opening of the active air intake grille in the embodiments of the present invention. Processor 201 executes the software programs, instructions, and modules stored in memory 202 to perform various functional applications and data processing of the device, thereby implementing the aforementioned method for determining the opening of the active air intake grille.

[0108] The memory 202 may primarily include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created based on the use of the terminal, etc. Furthermore, the memory 202 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 202 may further include a memory remotely located relative to the processor 201, and these remote memories may be connected to the device via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0109] The electronic device may further include: an input device 203 and an output device 204. The processor 201, the memory 202, the input device 203 and the output device 204 may be connected via a bus or other means. Figure 5 The bus connection is taken as an example.

[0110] The input device 203 can receive input digital or character information, and the output device 204 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The display device can include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, and a plasma display. In some embodiments, the display device can be a touch screen.

[0111] Example 4

[0112] This embodiment provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to cause the computer to execute the above-described method. The computer instructions on the computer-readable storage medium are used to cause the computer to execute the above-described method, thereby having at least the same advantages as the above-described method.

[0113] The medium in the present invention can adopt any combination of one or more computer-readable media. The medium can be a computer-readable signal medium or a computer-readable storage medium. The medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination of the above. More specific examples of media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer 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 of the above. In this document, the medium can be any tangible medium that contains or stores a program that can be used by or in combination with an instruction execution system, device or device.

[0114] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0115] The program code contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, RF (Radio Frequency), etc., or any suitable combination of the above.

[0116] Computer program code for carrying out the operations of the present invention may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0117] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. This is not a limitation herein.

[0118] The above specific embodiments do not constitute a limitation on the scope of protection of this application. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A method for determining the opening of an active air intake grille, characterized in that: include: Determine the vehicle's required cooling power based on the current vehicle speed, current active air intake grille opening, vehicle acceleration, passenger compartment required temperature, and power battery required temperature; determining a pre-adjusted active air intake grille opening according to the vehicle heat dissipation demand power, the first pre-adjusted cooling water flow rate, and the current vehicle speed; Obtaining a second pre-adjusted cooling water flow rate according to the current cooling water flow rate; Determining a vehicle power requirement change combination based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, a vehicle NVH power limit for the cooling fan at the current vehicle speed, and a vehicle NVH power limit for the cooling water pump at the current vehicle speed; Determining the required air intake grille opening according to the minimum value of the combination of required vehicle power changes; Determining the vehicle power requirement change combination based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the vehicle NVH power limit for the cooling fan at the current vehicle speed, and the vehicle NVH power limit for the cooling water pump at the current vehicle speed includes: determining a pre-adjusted forced air intake volume according to the current vehicle speed and the pre-adjusted active air intake grille opening; determining a pre-adjusted cooling fan power according to the pre-adjusted forced air inlet volume; Taking a first smaller value between the pre-adjusted cooling fan power and the vehicle NVH power limit for the cooling fan at the current vehicle speed, and calculating a first difference between the first smaller value and the current cooling fan power, the first difference being a cooling fan power change value; determining a pre-adjusted cooling water pump power according to the first pre-adjusted cooling water flow rate; Taking the second smaller value between the pre-adjusted cooling water pump power and the vehicle NVH power limit for the cooling water pump at the current vehicle speed, and calculating a second difference between the second smaller value and the current cooling water pump power, the second difference being the cooling water pump power change value; or determining the pre-adjusted cooling water pump power according to the second pre-adjusted cooling water flow rate; The cooling water pump power change value is determined based on the pre-adjusted engine cooling water pump power and the power limit of the cooling water pump imposed by the vehicle NVH at the current vehicle speed.

2. The method for determining the opening of the active air intake grille according to claim 1, characterized in that: Determining the vehicle's required heat dissipation power based on the current vehicle speed, the current active air intake grille opening, the vehicle's acceleration, the passenger compartment's required temperature, and the power battery's required temperature includes: Determine the current driving power based on the current vehicle speed, the current active air intake grille opening, and the vehicle acceleration; determining a heat dissipation power of a high-temperature radiator and a heat dissipation power of a low-temperature radiator according to the current driving power; Determine the condenser heat dissipation power based on the required temperature of the passenger compartment and the power battery; The heat dissipation power requirement of the entire vehicle is determined according to the heat dissipation power of the high-temperature radiator, the heat dissipation power of the low-temperature radiator and the heat dissipation power of the condenser.

3. The method for determining the opening of the active air intake grille according to claim 1, characterized in that: Determining the pre-adjusted active air intake grille opening according to the vehicle heat dissipation required power, the first pre-adjusted cooling water flow rate, and the current vehicle speed includes: determining a total air intake volume according to the vehicle heat dissipation demand power and the first pre-adjusted cooling water flow rate; A pre-adjusted active air intake grille opening is determined according to the total air intake volume and the current vehicle speed.

4. The method for determining the opening of the active air intake grille according to claim 1, characterized in that: Determining the vehicle power requirement change combination based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the vehicle NVH power limit for the cooling fan at the current vehicle speed, and the vehicle NVH power limit for the cooling water pump at the current vehicle speed includes: determining a driving power change value according to the current vehicle speed, the current active air intake grille opening, and the pre-adjusted active air intake grille opening; A combination of vehicle power requirement changes is determined based on the driving power change value, the cooling fan power change value, and the cooling water pump power change value.

5. The method for determining the opening of the active air intake grille according to claim 1, characterized in that: After determining the pre-adjusted active air intake grille opening according to the vehicle heat dissipation required power, the first pre-adjusted cooling water flow rate, and the current vehicle speed, the method further includes: determining a wind resistance change value based on the pre-adjusted active air intake grille opening and the current vehicle speed; determining a change value of acceleration resistance according to the vehicle acceleration; When it is determined that the wind resistance change value is less than a first preset value, or the acceleration resistance change value is less than a second preset value, determining the active air intake grille opening is stopped.

6. A device for determining the opening of an active air intake grille, characterized in that: include: The vehicle heat dissipation power requirement module is used to determine the vehicle heat dissipation power requirement based on the current vehicle speed, the current active air intake grille opening, vehicle acceleration, the passenger compartment temperature requirement, and the power battery temperature requirement; a pre-adjusted active air intake grille opening determination module, configured to determine the pre-adjusted active air intake grille opening according to the vehicle heat dissipation demand power, the first pre-adjusted cooling water flow rate, and the current vehicle speed; a second pre-regulated cooling water flow acquisition module, configured to acquire a second pre-regulated cooling water flow according to the current cooling water flow; a vehicle power requirement change combination determination module, configured to determine a vehicle power requirement change combination based on the current vehicle speed, the current active air intake grille opening, the pre-adjusted active air intake grille opening, the first pre-adjusted cooling water flow rate, the second pre-adjusted cooling water flow rate, the vehicle NVH power limit for the cooling fan at the current vehicle speed, and the vehicle NVH power limit for the cooling water pump at the current vehicle speed; A module for determining the required air intake grille opening, configured to determine the required air intake grille opening according to the minimum value of the combination of required vehicle power variations; The vehicle power requirement change combination determination module is further configured as follows: determining a pre-adjusted forced air intake volume according to the current vehicle speed and the pre-adjusted active air intake grille opening; determining a pre-adjusted cooling fan power according to the pre-adjusted forced air inlet volume; Taking a first smaller value between the pre-adjusted cooling fan power and the vehicle NVH power limit for the cooling fan at the current vehicle speed, and calculating a first difference between the first smaller value and the current cooling fan power, the first difference being a cooling fan power change value; determining a pre-adjusted cooling water pump power according to the first pre-adjusted cooling water flow rate; Taking the second smaller value between the pre-adjusted cooling water pump power and the vehicle NVH power limit for the cooling water pump at the current vehicle speed, and calculating a second difference between the second smaller value and the current cooling water pump power, the second difference being the cooling water pump power change value; or determining the pre-adjusted cooling water pump power according to the second pre-adjusted cooling water flow rate; The cooling water pump power change value is determined based on the pre-adjusted engine cooling water pump power and the power limit of the cooling water pump imposed by the vehicle NVH at the current vehicle speed.

7. An electronic device, characterized in that: include: at least one processor, and a memory communicatively coupled to the at least one processor; The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable the at least one processor to execute the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method according to any one of claims 1 to 5.

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