Vehicle temperature control method, device and equipment and storage medium

Abstract

The invention discloses a vehicle temperature control method, device and equipment and a storage medium, and relates to the technical field of vehicle control. The method comprises the steps that the target air outlet temperature of an air outlet of a vehicle air conditioner is calculated, and cold and heat source control is conducted on a vehicle according to the target air outlet temperature; the actual air outlet temperature of an air outlet of the vehicle air conditioner is obtained, and the current deviation and deviation increment corresponding to the air outlet temperature are determined based on the target air outlet temperature and the actual air outlet temperature; determining a proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient according to the current deviation and the deviation increment; and performing temperature control on the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient. Compared with a traditional vehicle temperature control method, the method does not depend on opening and closing of the cold source and the heat source of the vehicle simply by detecting the cooling and heating loads in the vehicle, so that the temperature stability of the vehicle during temperature control is improved, and the problem that the interior of the vehicle is suddenly cold and suddenly hot is avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a vehicle temperature control method, device, equipment and storage medium. Background Art

[0002] The existing vehicle temperature control method generally simply determines whether the cold source and heat source are turned on by detecting the cold and hot loads in the vehicle, and thereby realizes the temperature control of the vehicle. The control logic of this temperature control method is relatively simple, which makes the cold source and heat source of the vehicle frequently and cross-open and close, so the temperature stability is poor, which easily causes the problem of alternating cold and hot in the vehicle, thus greatly affecting the user's riding comfort. Therefore, the industry is in urgent need of a vehicle temperature control method that can improve temperature stability. Summary of the invention

[0003] The main purpose of the present application is to provide a vehicle temperature control method, device, equipment and storage medium, aiming to solve the technical problem of poor temperature stability of existing vehicle temperature control methods.

[0004] To achieve the above object, the present application provides a vehicle temperature control method, the method comprising the following steps:

[0005] Calculating the target air outlet temperature of the vehicle air conditioner, and controlling the cold and heat sources of the vehicle according to the target air outlet temperature;

[0006] Acquire the actual air outlet temperature of the air conditioner outlet of the vehicle, and determine the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature;

[0007] Determining a proportional adjustment coefficient, an integral adjustment coefficient, and a differential adjustment coefficient according to the current deviation and the deviation increment;

[0008] The vehicle is temperature controlled based on the proportional adjustment coefficient, the integral adjustment coefficient, and the differential adjustment coefficient.

[0009] In one embodiment, the step of calculating the target air outlet temperature of the air conditioner outlet of the vehicle and controlling the cold and heat sources of the vehicle according to the target air outlet temperature includes:

[0010] Calculate the target air outlet temperature of the vehicle air conditioner according to the current setting temperature, the interior temperature, the ambient temperature and the sunlight intensity of the vehicle, wherein the target air outlet temperature includes a first target air outlet temperature corresponding to the main driver of the vehicle and a second target air outlet temperature corresponding to the co-driver of the vehicle;

[0011] Selecting a minimum target air outlet temperature and a maximum target air outlet temperature from the first target air outlet temperature and the second target air outlet temperature;

[0012] The vehicle is subjected to cold source control according to the minimum target air outlet temperature, and the vehicle is subjected to heat source control according to the maximum target air outlet temperature.

[0013] In one embodiment, the step of determining the current deviation and the deviation increment corresponding to the outlet air temperature based on the target outlet air temperature and the actual outlet air temperature includes:

[0014] Determine the difference between the target air outlet temperature and the actual air outlet temperature as the current deviation corresponding to the air outlet temperature, and obtain the historical deviation corresponding to the air outlet temperature at the previous moment;

[0015] The difference between the current deviation and the historical deviation is used as the deviation increment corresponding to the outlet air temperature.

[0016] In one embodiment, the step of determining the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient according to the current deviation and the deviation increment includes:

[0017] Fuzzifying the current deviation and the deviation increment, and constructing a fuzzy rule table corresponding to the proportional adjustment coefficient increment, the integral adjustment coefficient increment and the differential adjustment coefficient increment based on the fuzzification result;

[0018] Determining the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value according to the fuzzy rule table;

[0019] A proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient are determined based on the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value.

[0020] In one embodiment, the step of controlling the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient includes:

[0021] Calculating the temperature damper position of the vehicle at the next moment according to the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient;

[0022] The vehicle is temperature controlled based on the temperature damper position at the next moment.

[0023] In one embodiment, the vehicle temperature control method further includes:

[0024] Acquiring an engine water temperature of the vehicle, and determining an output mode of a thermal management system in the vehicle according to the engine water temperature;

[0025] Whether to add a thermal management request engine heat supplement strategy is determined according to the output mode of the thermal management system, and the thermal management request engine heat supplement strategy is used to control the start or shut down of the engine in the vehicle.

[0026] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle temperature control device, the vehicle temperature control device comprising:

[0027] A cold and heat source control module, used to calculate the target air outlet temperature of the vehicle air conditioner outlet and control the cold and heat sources of the vehicle according to the target air outlet temperature;

[0028] a deviation calculation module, used to obtain the actual air outlet temperature of the vehicle air conditioner outlet, and determine the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature;

[0029] A coefficient determination module, used to determine a proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient according to the current deviation and the deviation increment;

[0030] A temperature control module is used to control the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient.

[0031] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle temperature control device, which includes: a memory, a processor, and a vehicle temperature control program stored on the memory and executable on the processor, and the vehicle temperature control program is configured to implement the steps of the vehicle temperature control method described above.

[0032] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a vehicle temperature control program is stored on the storage medium. When the vehicle temperature control program is executed by the processor, the steps of the vehicle temperature control method described above are implemented.

[0033] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer program product, which includes a vehicle temperature control program, and when the vehicle temperature control program is executed by a processor, the steps of the vehicle temperature control method described above are implemented.

[0034] The present application calculates the target air outlet temperature of the vehicle air conditioner outlet, and controls the cold and hot sources of the vehicle according to the target air outlet temperature; obtains the actual air outlet temperature of the vehicle air conditioner outlet, and determines the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature; determines the proportional adjustment coefficient, integral adjustment coefficient and differential adjustment coefficient based on the current deviation and the deviation increment; and controls the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient. After the present application controls the cold and hot sources of the vehicle according to the target air outlet temperature of the vehicle air conditioner outlet, the current deviation and deviation increment corresponding to the air outlet temperature obtained based on the target air outlet temperature and the actual air outlet temperature are determined, and finally the vehicle is temperature controlled based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient. Compared with the traditional vehicle temperature control method, the above method of the present application does not rely on simply opening and closing the cold source and heat source of the vehicle by detecting the cold and hot load in the vehicle, thereby improving the temperature stability of the vehicle during temperature control and avoiding the problem of alternating cold and hot in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a vehicle temperature control device in a hardware operating environment involved in an embodiment of the present application;

[0036] Figure 2 This is a flow chart of the first embodiment of the vehicle temperature control method of the present application;

[0037] Figure 3 A schematic diagram of a thermal management system circuit of a vehicle temperature control method of this application;

[0038] Figure 4 This is a flow chart of a second embodiment of the vehicle temperature control method of the present application;

[0039] Figure 5 This is a flow chart of a third embodiment of the vehicle temperature control method of the present application;

[0040] Figure 6 This is an intentional representation of the fuzzy rule corresponding to the proportional adjustment coefficient increment in the vehicle temperature control method of this application;

[0041] Figure 7 This is a fuzzy rule representation of the integral adjustment coefficient increment in the vehicle temperature control method of this application;

[0042] Figure 8 This is a fuzzy rule representation of the differential adjustment coefficient increment in the vehicle temperature control method of this application;

[0043] Fig. 9This is a structural block diagram of the first embodiment of the vehicle temperature control device of the present application.

[0044] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle temperature control device in the hardware operating environment involved in the embodiment of the present application.

[0047] like Figure 1 As shown, the vehicle temperature control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the vehicle temperature control device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0049] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a vehicle temperature control program.

[0050] exist Figure 1In the vehicle temperature control device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the vehicle temperature control device of the present application can be set in the vehicle temperature control device, and the vehicle temperature control device calls the vehicle temperature control program stored in the memory 1005 through the processor 1001, and executes the vehicle temperature control method provided in the embodiment of the present application.

[0051] The present application provides a vehicle temperature control method, referring to Figure 2 , Figure 2 This is a flow chart of the first embodiment of the vehicle temperature control method of the present application.

[0052] In this embodiment, the vehicle temperature control method includes the following steps:

[0053] Step S10: Calculate the target air outlet temperature of the vehicle air conditioner outlet, and control the cold and heat sources of the vehicle according to the target air outlet temperature.

[0054] It should be noted that the execution subject of the method of this embodiment can be a terminal device with data calculation, data processing and program running functions, such as an intelligent vehicle machine, a computer, etc., or an electronic device with the same or similar functions, such as the above-mentioned vehicle temperature control device. The following takes the vehicle temperature control device as an example to illustrate this embodiment and the following embodiments.

[0055] It is understandable that the above-mentioned vehicle may be a hybrid vehicle, that is, a vehicle whose driving system is composed of two or more single driving systems that can operate simultaneously.

[0056] It should be understood that the target air outlet temperature of the vehicle air conditioner outlet can be obtained by calculating the user's set temperature. The set temperature can be a custom temperature set by the user manually or by voice in the vehicle's temperature control interface; in particular, when the user does not set a custom temperature, the set temperature can also be a default temperature set by the vehicle temperature control device according to the current ambient temperature, and the default temperature is determined as the set temperature after obtaining the user's consent.

[0057] Step S20: Acquire the actual air outlet temperature of the vehicle air-conditioning outlet, and determine the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature.

[0058] It should be noted that the above-mentioned actual air outlet temperature may be the temperature corresponding to the air outlet of the vehicle air conditioner after the cold and heat sources of the vehicle are controlled according to the target air outlet temperature.

[0059] It should be understood that the above-mentioned current deviation may refer to the temperature difference between the target outlet air temperature and the actual outlet air temperature, and the above-mentioned deviation increment may refer to the increment of the temperature difference between the target outlet air temperature and the actual outlet air temperature at the previous moment and the temperature difference between the target outlet air temperature and the actual outlet air temperature at the current moment.

[0060] Step S30: determining a proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient according to the current deviation and the deviation increment.

[0061] It should be noted that the above-mentioned proportional adjustment coefficient, integral adjustment coefficient and differential adjustment coefficient can be represented by Kp, Ki and Kd respectively, which together constitute the control parameters in the fuzzy PID control process. Among them, Kp can quickly respond to the system error and improve the accuracy and sensitivity of the system. When the system error is large, Kp will play a greater regulatory role, allowing the system to quickly approach the target value; Ki is mainly used to eliminate the residual effect caused by the accumulation of errors in the system and achieve a smoother control process. It accumulates error information by integrating the error and adjusts the control amount according to this accumulation, thereby eliminating static errors; Kd improves the dynamic performance of the system by predicting the change of the error, improves the instantaneous response and stability of the system, and adjusts the control amount according to the rate of change of the error, thereby suppressing the oscillation and overshoot of the system.

[0062] It should be understood that after obtaining the above-mentioned current deviation and deviation increment, the proportional adjustment coefficient Kp, the integral adjustment coefficient Ki and the differential adjustment coefficient Kd can be determined based on the following rules: when the current deviation is large, in order to quickly correct the deviation, Kp should take a larger value, which can speed up the response speed of the system and make the system approach the target value faster; when the current deviation is small, in order to reduce the overshoot and oscillation of the system, Kp should be appropriately reduced, so that the system can be more stable when approaching the target value; when the current deviation is large, in order to eliminate the deviation as soon as possible, Ki can temporarily take a smaller value or zero to avoid system overshoot and oscillation caused by the integral action; when the current deviation is small, Ki should be appropriately increased to strengthen the integral action, thereby eliminating the steady-state error; when the deviation increment is large, in order to slow down the overshoot and oscillation of the system, Kd should take a larger value, so that the control amount can be reduced in advance, so that the system can approach the target value more smoothly; when the deviation increment is small, Kd can be appropriately reduced, because at this time the system is close to the target value, and the differential action should not be too strong to avoid causing unnecessary fluctuations.

[0063] Step S40: temperature controlling the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient.

[0064] In a specific implementation, the vehicle's thermal management system can be PID controlled based on the above-mentioned proportional adjustment coefficient, integral adjustment coefficient and differential adjustment coefficient, thereby achieving temperature control of the vehicle. Figure 3 , Figure 3 This is a schematic diagram of the thermal management system circuit of the vehicle temperature control method of this application. Figure 3 In the figure, LT RAD indicates the motor circuit heat exchanger, CON indicates the refrigerant circuit heat exchanger, HT RAD indicates the engine circuit heat exchanger, FAN indicates the fan, Tank1 indicates the motor circuit water tank, Punp_M indicates the motor water pump, MCU indicates the motor controller, Engine indicates the engine, E_Pump indicates the heater water pump, Tank2 indicates the heater circuit water tank, F-HVAC indicates the air conditioning box, EVAP indicates the evaporator, Heat Core indicates the heater core, APTC indicates the air resistor, ETXV indicates the passenger compartment electronic expansion valve, EXV_Chiller indicates the battery side electronic expansion valve, Battery indicates the battery pack, PT1 indicates the battery outlet temperature and pressure sensor, T indicates the air outlet temperature sensor, Tc indicates the heater core temperature sensor, T1 indicates the motor outlet water temperature sensor, P1 indicates the outdoor heat exchanger outlet pressure sensor, TMM indicates the engine thermal management module, COMP indicates the compressor, and IHX indicates the intermediate heat exchanger.

[0065] This embodiment calculates the target air outlet temperature of the vehicle air conditioner outlet, and controls the cold and hot sources of the vehicle according to the target air outlet temperature; obtains the actual air outlet temperature of the vehicle air conditioner outlet, and determines the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature; determines the proportional adjustment coefficient, integral adjustment coefficient and differential adjustment coefficient based on the current deviation and the deviation increment; and controls the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient. After the cold and hot sources of the vehicle are controlled according to the target air outlet temperature of the vehicle air conditioner outlet, this embodiment determines the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient based on the current deviation and deviation increment corresponding to the air outlet temperature obtained from the target air outlet temperature and the actual air outlet temperature, and finally controls the temperature of the vehicle according to the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient. Compared with the traditional vehicle temperature control method, the above method of the present application does not rely on simply opening and closing the cold source and the heat source of the vehicle by detecting the cold and hot load in the vehicle, thereby improving the temperature stability of the vehicle during temperature control and avoiding the problem of alternating cold and hot in the vehicle.

[0066] refer to Figure 4 , Figure 4 This is a flow chart of the second embodiment of the vehicle temperature control method of the present application.

[0067] In a feasible implementation manner, the step S10 may include:

[0068] Step S101: Calculate the target air outlet temperature of the vehicle's air conditioning outlet based on the vehicle's current set temperature, interior temperature, ambient temperature and sunlight intensity, wherein the target air outlet temperature includes a first target air outlet temperature corresponding to the vehicle's main driver and a second target air outlet temperature corresponding to the vehicle's co-driver.

[0069] In a specific implementation, after obtaining the set temperature, in-car temperature, ambient temperature and sunlight intensity of the vehicle at the current moment, the target air outlet temperature of the vehicle air conditioning outlet can be calculated based on the following formula: TempTarget = A*TempSet+B*TempAmb+C*Q+D*(TempSet-TempIncar)+E. Among them, TempTarget represents the above target air outlet temperature, TempSet represents the above set temperature, TempAmb represents the above ambient temperature, TempIncar represents the above in-car temperature, Q represents the above sunlight intensity, A, B, C, D, and E are all calibration coefficients, and A, B, C, and D change with the change of ambient temperature. In particular, the calibration values ​​of A, B, C, and D can be obtained through test calibration. A and B can be calibrated based on the ambient temperature and the set temperature of the vehicle during the test process, C can be calibrated based on the ambient temperature and irradiance of the vehicle during the test process, and D can be calibrated based on the difference between the ambient temperature of the vehicle during the test process and the set temperature and the in-car temperature.

[0070] Step S102: selecting a minimum target air outlet temperature and a maximum target air outlet temperature from the first target air outlet temperature and the second target air outlet temperature.

[0071] In a specific implementation, the target air outlet temperature of the vehicle's main driver can be compared with the target air outlet temperature of the vehicle's co-driver, and the one with the smallest temperature value can be selected as the minimum target air outlet temperature, and the one with the largest temperature value can be selected as the maximum target air outlet temperature.

[0072] Step S103: performing cold source control on the vehicle according to the minimum target air outlet temperature, and performing heat source control on the vehicle according to the maximum target air outlet temperature.

[0073] In the specific implementation, assuming that the minimum target air outlet temperature is Tmin, Tmin-3℃ can be used as the lower limit and Tmin+3℃ as the upper limit. When the outside temperature is greater than Tmin+3, the cooling source in the vehicle is turned on; when the outside temperature is less than Tmin-3, the cooling source is turned off; when Tmin-3 is less than the outside temperature and less than Tmin+3, the last value is output (i.e., turned on or off), and it is turned off by default.

[0074] Similarly, assuming that the maximum target air outlet temperature is Tmax, Tmax-3℃ can be used as the lower limit and Tmax+3℃ as the upper limit. When the outside temperature is greater than Tmax+3, the heat source in the vehicle is turned off; when the outside temperature is less than Tmax-3℃, the heat source is turned on; when Tmax-3 is less than the outside temperature and less than Tmax+3, the last value is output (i.e., turned on or off), and the default is turned off.

[0075] In a feasible implementation manner, the step S20 may include:

[0076] Step S201: determining the difference between the target air outlet temperature and the actual air outlet temperature as the current deviation corresponding to the air outlet temperature, and obtaining the historical deviation corresponding to the air outlet temperature at the previous moment.

[0077] Step S202: taking the difference between the current deviation and the historical deviation as the deviation increment corresponding to the outlet air temperature.

[0078] In the specific implementation, assuming that the target air outlet temperature and the actual air outlet temperature at time k are represented by r(k) and y(k) respectively, the current deviation e(k) corresponding to the vehicle air outlet temperature can be expressed as e(k)=r(k)-y(k), the historical deviation corresponding to the air outlet temperature at the previous moment can be expressed as e(k-1), and the deviation increment ec(k) corresponding to the vehicle air outlet temperature can be expressed as ec(k)=e(k)-e(k-1).

[0079] This embodiment calculates the target air outlet temperature of the vehicle's air-conditioning outlet according to the vehicle's set temperature, interior temperature, ambient temperature and sunlight intensity at the current moment, the target air outlet temperature including a first target air outlet temperature corresponding to the vehicle's main driver and a second target air outlet temperature corresponding to the vehicle's co-driver; selects a minimum target air outlet temperature and a maximum target air outlet temperature from the first target air outlet temperature and the second target air outlet temperature; performs cold source control on the vehicle according to the minimum target air outlet temperature, and performs heat source control on the vehicle according to the maximum target air outlet temperature; determines the difference between the target air outlet temperature and the actual air outlet temperature as the current deviation corresponding to the air outlet temperature, and obtains the historical deviation corresponding to the air outlet temperature at the previous moment; and determines the difference between the current deviation and the historical deviation as the deviation increment corresponding to the air outlet temperature. Compared with the traditional vehicle temperature control method, the above method of this embodiment calculates the target air outlet temperature of the vehicle's air-conditioning outlet according to the vehicle's set temperature, interior temperature, ambient temperature and sunlight intensity, and then performs cold source control and heat source control on the vehicle according to the minimum target air outlet temperature and maximum target air outlet temperature in the driver and co-driver seats of the vehicle, respectively. This makes the control of the vehicle's cold source and heat source in this embodiment more in line with actual vehicle usage scenarios, thereby achieving more refined vehicle temperature control.

[0080] refer to Figure 5 , Figure 5 This is a flow chart of a third embodiment of the vehicle temperature control method of the present application.

[0081] In a feasible implementation manner, the step S30 may include:

[0082] Step S301: fuzzify the current deviation and the deviation increment, and construct a fuzzy rule table corresponding to the proportional adjustment coefficient increment, the integral adjustment coefficient increment and the differential adjustment coefficient increment based on the fuzzification result.

[0083] Step S302: determining the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value according to the fuzzy rule table.

[0084] Step S303: determining a proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient based on the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value.

[0085] In the specific implementation, it is necessary to first determine the fuzzy subsets of the current deviation e and the deviation increment ec. For PID control, this embodiment selects 7 language variables, namely, negative large [NB], negative medium [NM], negative small [NS], zero [ZO], positive small [PS], positive medium [PM], and positive large [PB], which can express its fuzzy subsets with sufficient accuracy. Therefore, this embodiment defines that the fuzzy subsets of e and ec are {NB, NM, NS, ZO, PS, PM, PB}. In particular, the fuzzy rule table corresponding to the above-mentioned proportional adjustment coefficient increment can be referred to Figure 6 , Figure 6 This is a fuzzy rule representation of the proportional adjustment coefficient increment in the vehicle temperature control method of this application, where △ Kp represents the proportional adjustment coefficient increment, E represents the current deviation, and EC represents the deviation increment; the rule table corresponding to the above integral adjustment coefficient increment fuzzy can be referred to Figure 7 , Figure 7 This is a fuzzy rule representation of the integral adjustment coefficient increment in the vehicle temperature control method of this application, where △ Ki represents the integral adjustment coefficient increment, E represents the current deviation, and EC represents the deviation increment; the fuzzy rule table corresponding to the differential adjustment coefficient increment can be referred to Figure 8 , Figure 8 This is a fuzzy rule representation of the differential adjustment coefficient increment in the vehicle temperature control method of this application, where △Ki represents the differential adjustment coefficient increment, E represents the current deviation, and EC represents the deviation increment. Finally, after obtaining the fuzzy value of the proportional adjustment coefficient, the fuzzy value of the integral adjustment coefficient, and the fuzzy value of the differential adjustment coefficient, these fuzzy values ​​can be defuzzified respectively to obtain the above-mentioned proportional adjustment coefficient, integral adjustment coefficient, and differential adjustment coefficient.

[0086] In a feasible implementation manner, the step S40 may include:

[0087] Step S401: Calculate the temperature damper position of the vehicle at the next moment according to the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient.

[0088] In a specific implementation, the temperature damper position of the vehicle at the next moment can be calculated based on the following formula: TempPos = ΔTempPos + TempPos_M, ΔTempPos = Kp (ΔT_(k) - ΔT_(k - 1)) + Ki*ΔT_(k) + Kd. Among them, TempPos represents the temperature damper position at the next moment, ΔTempPos represents the damper change, TempPos_M represents the damper position at this moment, ΔT_(k) represents the difference between the set temperature of the air outlet at this moment and the actual air outlet temperature, ΔT_(k - 1) represents the difference between the set temperature and the actual temperature at the previous moment, Kp represents the proportional adjustment coefficient, Ki represents the integral adjustment coefficient, and Kd represents the differential adjustment coefficient.

[0089] Step S402: Controlling the temperature of the vehicle based on the temperature damper position at the next moment.

[0090] It should be understood that the control of the temperature damper can be achieved by a servo motor, and the specific steps are as follows: first, perform the initialization task, including motor initialization (configure the timer to output pulses to control the motor), encoder initialization (configure the timer to read the encoder count value), timer initialization (configure the basic timer to generate a timer interrupt to perform PID operation), PID parameter initialization (configure the target value, actual value, error, integral term, proportional gain, integral gain and differential gain related parameters); then set the target value (that is, the temperature damper position of the above-mentioned vehicle at the next moment) and enable the motor, so that the motor rotates and the encoder counts feedback; finally, perform the PID operation again according to the feedback result to limit the duty cycle of the motor until the actual position of the temperature damper reaches the temperature damper position at the next moment mentioned above.

[0091] In a feasible implementation manner, the vehicle temperature control method may further include:

[0092] Step S1: Acquire the engine water temperature of the vehicle, and determine the output mode of the thermal management system in the vehicle according to the engine water temperature.

[0093] In the specific implementation, when the passenger compartment requests a heating mode and the engine water temperature is at least 20°C higher than the outlet target temperature, it can be determined that the output mode of the thermal management system in the vehicle is passenger compartment engine heating; when the engine water temperature is greater than 60°C, it can be determined that the output mode of the thermal management system in the vehicle is passenger compartment engine and PTC (Positive Temperature Coefficient) mixed heating; if none of the above conditions are met, it can be determined that the output mode of the thermal management system in the vehicle is passenger compartment PTC heating alone.

[0094] Step S2: judging whether to add a thermal management request engine heating supplement strategy according to the output mode of the thermal management system, wherein the thermal management request engine heating supplement strategy is used to control the start or shut down of the engine in the vehicle.

[0095] In the specific implementation, in order to increase the temperature rise rate of the passenger compartment, the thermal management request engine heating strategy is added: when the thermal management output mode is passenger compartment PTC heating alone and the PTC outlet water temperature is less than the warm core target water temperature -10℃ for 3 minutes, the engine start request can be output to the thermal management system; when the thermal management output mode is passenger compartment engine heating / passenger compartment engine and PTC mixed heating and the warm core target water temperature is less than 60 degrees for 2 minutes, no engine start request can be output to the thermal management system. When the thermal management output mode is passenger compartment PTC heating alone, the PTC target power is calculated according to the following control: the control object is the actual outlet air temperature, the control target is the target outlet air temperature, the control accuracy is 0~1℃, and the PID parameter calculation cycle is 1000ms. When the thermal management output mode is passenger compartment engine and PTC mixed heating, it is necessary to first determine the position of the air conditioning cold and warm mixed damper (when the mixed damper position is 0%, it means full cold, and when it is 100%, it means full heat). When the mixed damper position is ≥98%, PTC enable = 1, and PTC target power is calculated according to the following control: the control object is the actual outlet air temperature, the control target is the target outlet air temperature, the control accuracy is 0~1℃, and the PID parameter calculation cycle is 1000ms. When the mixed damper position is ≤95%, PTC enable = 0, and PTC target power = 0.

[0096] This embodiment fuzzifies the current deviation and the deviation increment, and constructs a fuzzy rule table corresponding to the proportional adjustment coefficient increment, the integral adjustment coefficient increment and the differential adjustment coefficient increment based on the fuzzification result; determines the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value according to the fuzzy rule table; determines the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient based on the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value; calculates the temperature damper position of the vehicle at the next moment according to the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient; performs temperature control on the vehicle based on the temperature damper position at the next moment; obtains the engine water temperature of the vehicle, and determines the output mode of the thermal management system in the vehicle according to the engine water temperature; determines whether to add a thermal management request engine heating supplement strategy according to the output mode of the thermal management system, and the thermal management request engine heating supplement strategy is used to control the start or shutdown of the engine in the vehicle. Compared with the traditional vehicle temperature control method, the above method of this embodiment determines the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient according to the fuzzy results of the current deviation and the deviation increment, thereby realizing the rapid adjustment of the PID control parameters related to the vehicle temperature control; at the same time, by adding a thermal management request engine heating strategy to control the start or shutdown of the engine in the vehicle, the response time and control accuracy of the temperature control are further improved.

[0097] In addition, an embodiment of the present application further proposes a storage medium, on which a vehicle temperature control program is stored. When the vehicle temperature control program is executed by a processor, the steps of the vehicle temperature control method described above are implemented.

[0098] Reference Fig. 9 , Fig. 9 This is a structural block diagram of the first embodiment of the vehicle temperature control device of the present application.

[0099] like Fig. 9 As shown, the vehicle temperature control device proposed in the embodiment of the present application includes:

[0100] The cold and heat source control module 901 is used to calculate the target air outlet temperature of the vehicle air conditioner outlet and control the cold and heat sources of the vehicle according to the target air outlet temperature;

[0101] The deviation calculation module 902 is used to obtain the actual air outlet temperature of the vehicle air conditioner outlet, and determine the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature;

[0102] A coefficient determination module 903 is used to determine a proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient according to the current deviation and the deviation increment;

[0103] The temperature control module 904 is used to control the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient.

[0104] This embodiment calculates the target air outlet temperature of the vehicle air conditioner outlet, and controls the cold and hot sources of the vehicle according to the target air outlet temperature; obtains the actual air outlet temperature of the vehicle air conditioner outlet, and determines the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature; determines the proportional adjustment coefficient, integral adjustment coefficient and differential adjustment coefficient based on the current deviation and the deviation increment; and controls the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient. After the cold and hot sources of the vehicle are controlled according to the target air outlet temperature of the vehicle air conditioner outlet, this embodiment determines the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient based on the current deviation and deviation increment corresponding to the air outlet temperature obtained from the target air outlet temperature and the actual air outlet temperature, and finally controls the temperature of the vehicle according to the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient. Compared with the traditional vehicle temperature control method, the above method of the present application does not rely on simply opening and closing the cold source and the heat source of the vehicle by detecting the cold and hot load in the vehicle, thereby improving the temperature stability of the vehicle during temperature control and avoiding the problem of alternating cold and hot in the vehicle.

[0105] Based on the first embodiment of the vehicle temperature control device described above in the present application, a second embodiment of the vehicle temperature control device described above in the present application is proposed.

[0106] In this embodiment, the cold and heat source control module 901 is also used to calculate the target air outlet temperature of the vehicle's air-conditioning outlet based on the vehicle's set temperature, interior temperature, ambient temperature and sunlight intensity at the current moment, the target air outlet temperature including a first target air outlet temperature corresponding to the vehicle's main driver and a second target air outlet temperature corresponding to the vehicle's co-driver; select a minimum target air outlet temperature and a maximum target air outlet temperature from the first target air outlet temperature and the second target air outlet temperature; perform cold source control on the vehicle according to the minimum target air outlet temperature, and perform heat source control on the vehicle according to the maximum target air outlet temperature.

[0107] Furthermore, the deviation calculation module 902 is also used to determine the difference between the target outlet air temperature and the actual outlet air temperature as the current deviation corresponding to the outlet air temperature, and obtain the historical deviation corresponding to the outlet air temperature at the previous moment; and use the difference between the current deviation and the historical deviation as the deviation increment corresponding to the outlet air temperature.

[0108] Furthermore, the coefficient determination module 903 is also used to fuzzy the current deviation and the deviation increment, and construct a fuzzy rule table corresponding to the proportional adjustment coefficient increment, the integral adjustment coefficient increment and the differential adjustment coefficient increment based on the fuzzification result; determine the fuzzy value of the proportional adjustment coefficient, the fuzzy value of the integral adjustment coefficient and the fuzzy value of the differential adjustment coefficient according to the fuzzy rule table; determine the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient based on the fuzzy value of the proportional adjustment coefficient, the fuzzy value of the integral adjustment coefficient and the fuzzy value of the differential adjustment coefficient.

[0109] Furthermore, the temperature control module 904 is also used to calculate the temperature valve position of the vehicle at the next moment according to the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient; and to perform temperature control on the vehicle based on the temperature valve position at the next moment.

[0110] Furthermore, the temperature control module 904 is also used to obtain the engine water temperature of the vehicle, and determine the output mode of the thermal management system in the vehicle according to the engine water temperature; determine whether to add a thermal management request engine heating strategy according to the output mode of the thermal management system, and the thermal management request engine heating strategy is used to control the start or shutdown of the engine in the vehicle.

[0111] Other embodiments or specific implementations of the vehicle temperature control device of the present application can refer to the above-mentioned method embodiments and will not be repeated here.

[0112] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0113] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0114] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0115] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vehicle temperature control method, characterized in that: The method comprises the following steps: Calculating the target air outlet temperature of the vehicle air conditioner, and controlling the cold and heat sources of the vehicle according to the target air outlet temperature; Acquire the actual air outlet temperature of the air conditioner outlet of the vehicle, and determine the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature; Determining a proportional adjustment coefficient, an integral adjustment coefficient, and a differential adjustment coefficient according to the current deviation and the deviation increment; The vehicle is temperature controlled based on the proportional adjustment coefficient, the integral adjustment coefficient, and the differential adjustment coefficient.

2. The vehicle temperature control method according to claim 1, characterized in that: The step of calculating the target air outlet temperature of the vehicle air conditioner outlet and controlling the cold and heat sources of the vehicle according to the target air outlet temperature comprises: Calculate the target air outlet temperature of the vehicle air conditioner according to the current setting temperature, the interior temperature, the ambient temperature and the sunlight intensity of the vehicle, wherein the target air outlet temperature includes a first target air outlet temperature corresponding to the main driver of the vehicle and a second target air outlet temperature corresponding to the co-driver of the vehicle; Selecting a minimum target air outlet temperature and a maximum target air outlet temperature from the first target air outlet temperature and the second target air outlet temperature; The vehicle is subjected to cold source control according to the minimum target air outlet temperature, and the vehicle is subjected to heat source control according to the maximum target air outlet temperature.

3. The vehicle temperature control method according to claim 1, characterized in that: The step of determining a current deviation and a deviation increment corresponding to the outlet air temperature based on the target outlet air temperature and the actual outlet air temperature comprises: Determine the difference between the target air outlet temperature and the actual air outlet temperature as the current deviation corresponding to the air outlet temperature, and obtain the historical deviation corresponding to the air outlet temperature at the previous moment; The difference between the current deviation and the historical deviation is used as the deviation increment corresponding to the outlet air temperature.

4. The vehicle temperature control method according to claim 1, characterized in that: The step of determining the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient according to the current deviation and the deviation increment comprises: Fuzzifying the current deviation and the deviation increment, and constructing a fuzzy rule table corresponding to the proportional adjustment coefficient increment, the integral adjustment coefficient increment and the differential adjustment coefficient increment based on the fuzzification result; Determining the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value according to the fuzzy rule table; A proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient are determined based on the proportional adjustment coefficient fuzzy value, the integral adjustment coefficient fuzzy value and the differential adjustment coefficient fuzzy value.

5. The vehicle temperature control method according to claim 1, characterized in that: The step of controlling the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient comprises: Calculating the temperature damper position of the vehicle at the next moment according to the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient; The vehicle is temperature controlled based on the temperature damper position at the next moment.

6. The vehicle temperature control method according to claim 1, characterized in that: The vehicle temperature control method further includes: Acquiring an engine water temperature of the vehicle, and determining an output mode of a thermal management system in the vehicle according to the engine water temperature; Whether to add a thermal management request engine heat supplement strategy is determined according to the output mode of the thermal management system, and the thermal management request engine heat supplement strategy is used to control the start or shut down of the engine in the vehicle.

7. A vehicle temperature control device, characterized in that: The vehicle temperature control device comprises: A cold and heat source control module, used to calculate the target air outlet temperature of the vehicle air conditioner outlet and control the cold and heat sources of the vehicle according to the target air outlet temperature; a deviation calculation module, used to obtain the actual air outlet temperature of the vehicle air conditioner outlet, and determine the current deviation and deviation increment corresponding to the air outlet temperature based on the target air outlet temperature and the actual air outlet temperature; A coefficient determination module, used to determine a proportional adjustment coefficient, an integral adjustment coefficient and a differential adjustment coefficient according to the current deviation and the deviation increment; A temperature control module is used to control the temperature of the vehicle based on the proportional adjustment coefficient, the integral adjustment coefficient and the differential adjustment coefficient.

8. A vehicle temperature control device, characterized in that: The device comprises: a memory, a processor, and a vehicle temperature control program stored in the memory and executable on the processor, wherein the vehicle temperature control program is configured to implement the steps of the vehicle temperature control method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, on which a vehicle temperature control program is stored. When the vehicle temperature control program is executed by a processor, the steps of the vehicle temperature control method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a vehicle temperature control program, and when the vehicle temperature control program is executed by a processor, the steps of the vehicle temperature control method according to any one of claims 1 to 6 are implemented.

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