WO2019029095A1

WO2019029095A1 - Built-in temperature detecting unit-based automatic vehicle air conditioning control method and controller

Info

Publication number: WO2019029095A1
Application number: PCT/CN2017/118384
Authority: WO
Inventors: 陈雄志; 隋延春
Original assignee: 惠州市德赛西威汽车电子股份有限公司
Priority date: 2017-08-11
Filing date: 2017-12-25
Publication date: 2019-02-14
Also published as: CN107571713B; CN107571713A

Abstract

A built-in temperature detecting unit-based automatic vehicle air conditioning control method and controller, comprising the following steps: A. acquiring a vehicle body temperature of the whole vehicle; B. by means of the acquired vehicle body temperature of the whole vehicle, calculating and outputting a virtual vehicle interior temperature that is equal to an actual vehicle interior air temperature; C. according to the virtual vehicle interior temperature, controlling wind output. The control method and the controller obtain the vehicle body temperature of the whole vehicle by means of a built-in temperature detecting unit disposed on a certain component related to the air conditioner controller, and obtain a virtual vehicle interior temperature by using a a thermodynamic model; furthermore, by means of the virtual vehicle interior temperature, subsequent automatic control of the vehicle interior temperature is accomplished, thereby achieving automatic control of the interior temperature of the vehicle without requiring a vehicle interior temperature sensor, thus saving costs on vehicle interior temperature sensors and accompanying wire harnesses thereof while ensuring stability and accuracy in controlling vehicle interior temperature.

Description

Automobile automatic air conditioning control method and controller based on built-in temperature detecting unit

Technical field

The invention relates to the technical field of automobile automatic air conditioning control, in particular to an automobile automatic air conditioning control method and controller based on a built-in temperature detecting unit.

Background technique

In the modern automobile automatic air conditioning control system, the central control module automatically adjusts the indoor climate according to the ambient climatic conditions and the signals detected by the temperature and humidity sensors, so that the temperature and air volume in the vehicle are maintained at a comfortable level. The interior temperature sensor is an important unit in the current automotive automatic air conditioning control system.

The current in-vehicle temperature sensors mainly include a suction type interior temperature sensor and a non-inhalation type interior temperature sensor. The conventional suction type interior temperature sensor uses the negative pressure of the air conditioning system box or the ventilation motor to draw in the air inside the vehicle, and the air flows along the pipeline through the temperature sensor disposed in the pipeline to measure the temperature of the air inside the vehicle, but due to the negative pressure As the air volume of the blower changes, it will cause a change in the inspiratory volume. The unstable air intake will affect the measurement of the air temperature inside the vehicle, and the pipe structure of the in-vehicle temperature sensor will cause the dust in the air to accumulate or even block in the pipeline. , affecting the measurement of the air temperature inside the car. The non-inhalation interior temperature sensor does not have the above-mentioned problem of the in-vehicle temperature sensor, but it needs to expose a sensor probe to contact with the air, which affects the interior of the car, and if the passenger accidentally touches the sensor The probe will affect the accuracy of the air temperature measurement inside the car.

Both the inhaled in-vehicle temperature sensor and the non-inhalation in-vehicle temperature sensor require a certain production cost.

Summary of the invention

In view of the above technical problems, the present invention provides an automobile automatic air conditioning control method and controller based on a built-in temperature detecting unit that improves stability and accuracy of temperature measurement in a vehicle and reduces production cost.

In order to solve the above technical problem, the specific solution provided by the present invention is as follows: A method for controlling an automatic air conditioner of an automobile based on a built-in temperature detecting unit, comprising the following steps: A: obtaining a vehicle body temperature; B, obtaining the whole The vehicle body temperature calculates and outputs the virtual interior temperature equal to the actual vehicle air temperature; C. controls the wind according to the virtual interior temperature.

Preferably, before the step B, the parameter correction step is further included. When the obtained vehicle body temperature and the actually detected air temperature in the vehicle have an error larger than the tolerance error range, the corresponding parameters are adjusted and the virtual interior temperature is output. When the obtained vehicle body temperature and the actually detected air temperature in the vehicle have an error smaller than the tolerance error range, the virtual interior temperature can be output without parameter adjustment.

Preferably, the tolerance error ranges from "-1.5 ° C to 1.5 ° C".

Preferably, the parameter modification includes the following parameter quantities: ambient temperature, sunlight intensity, engine water temperature, evaporator temperature, mixing damper position, internal and external circulation damper position, mode damper position, and blower voltage, vehicle body temperature and interior air There is a big difference in temperature. In order to obtain the temperature of the air inside the vehicle through the obtained vehicle body temperature, it is necessary to consider the amount of the connection between the two.

Preferably, the step C specifically includes: C1, controlling the air outlet mode; C2, controlling the target air outlet temperature; C3, controlling the target wind, and automatically adjusting the interior temperature.

The invention provides an automobile automatic air conditioning controller based on a built-in temperature detecting unit, comprising an air conditioner controller and a built-in temperature detecting unit connected to the air conditioner controller.

Preferably, the control strategy of the air conditioner controller includes an in-vehicle temperature calculation module, an in-vehicle temperature control module, and an air outlet module, and the built-in temperature detecting unit sends the acquired vehicle body temperature to the in-vehicle temperature calculation. The module, the in-vehicle temperature calculation module calculates the virtual vehicle interior temperature and sends it to the in-vehicle temperature control module, and the in-vehicle temperature control module controls the outlet module to generate air.

Preferably, the air outlet module includes an air outlet mode control end that controls the air outlet mode, an air outlet temperature control end that controls the target air outlet temperature, and a blower control end that controls the target wind, to automatically adjust the interior temperature.

Preferably, the air outlet module further comprises an inner and outer circulation control end for controlling internal and external circulation.

Preferably, the in-vehicle temperature calculation module includes a temperature correction end and a parameter interface end, the temperature correction end corrects and outputs a virtual interior temperature equal to an actual in-vehicle air temperature, and the parameter interface end is used to adjust the temperature correction. The correction of each parameter in the end correction process causes the virtual interior temperature outputted by the temperature correction end to be the same as the actually detected interior air temperature, and the output virtual interior temperature feedback is used to control the outlet mode and the target outlet temperature. And the target wind speed.

Compared with the prior art, the present invention has the beneficial effects of obtaining the vehicle body temperature through a built-in temperature detecting unit provided on a certain component related to the air conditioner controller, and obtaining a virtual vehicle interior temperature by using a thermodynamic model, and further Through the virtual interior temperature to complete the subsequent automatic control of the interior temperature, the automatic control of the interior temperature without the need for the interior temperature sensor is realized, which saves the temperature sensor inside the vehicle and the cost of the attached wiring harness, and ensures the temperature control inside the vehicle. Stability and accuracy.

DRAWINGS

1 is a flowchart of parameter correction in the first embodiment;

2 and FIG. 3 are flowcharts showing specific calculations of the temperature inside the virtual vehicle;

Figure 4 is a graph showing the calculation of the external temperature compensation of the present invention;

Figure 5 is a graph of solar compensation calculation of the present invention;

Figure 6 is a graph showing the calculation of the outlet temperature compensation of the present invention;

Figure 7 is a graph showing the calculation of the wind speed compensation of the present invention;

FIG. 8 is a block diagram showing the overall structure of the second embodiment.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below with reference to the accompanying drawings.

Embodiment 1: The automatic air conditioning control method based on the built-in temperature detecting unit, A, obtaining the vehicle body temperature; B, calculating and outputting the virtual vehicle interior temperature equal to the actual vehicle air temperature by acquiring the vehicle body temperature; C. According to the temperature inside the virtual car, the wind is controlled.

Step B further includes a parameter correction step. When the obtained vehicle body temperature and the actually detected vehicle air temperature have an error greater than the tolerance error range, the corresponding parameters are adjusted and the virtual vehicle interior temperature is output; When the error between the vehicle body temperature and the actually detected air temperature in the vehicle is less than the tolerance error range, the virtual interior temperature can be output without parameter adjustment. As shown in Fig. 1, the parameter correction process is as follows: Obtain the vehicle body temperature Determine whether the output vehicle body temperature and the actual vehicle air temperature are greater than the tolerance error range. If the tolerance is greater than the tolerance error range, the parameter calculation is performed according to the error, and finally the virtual vehicle interior temperature corresponding to the actual vehicle air temperature is calculated. The calculation of the parameters can only consider the calculation of the vehicle body temperature and the actual vehicle air temperature. It should be noted that the tolerance error range can be adjusted according to actual needs, without any limitation, and in the parameter correction process. , the parameter calculation will be in the output of the vehicle body temperature and the actual car air temperature When the difference reaches the end of the error within the tolerable range, otherwise it will continue to adjust the parameters.

In order to improve the accuracy of temperature control inside the vehicle, the parameter calculation in this embodiment also includes the following parameter quantities: ambient temperature, sunlight intensity, engine water temperature, evaporator temperature, mixing damper position, internal and external circulation damper position, mode damper position As well as the blower voltage, the calculation of the virtual interior temperature needs to consider all the energy input that affects the temperature of the air inside the vehicle. The external temperature sensor, the sunlight sensor, the engine water temperature sensor and the evaporator temperature sensor installed on the vehicle sense the external energy. The input, combined with the energy input of the mixed damper position, the internal and external circulation damper position, the mode damper position and the blower voltage, is used to calculate their influence on the air temperature inside the vehicle, thereby obtaining the virtual interior temperature.

The influence of each external energy input on the air temperature inside the vehicle is determined by environmental simulation experiments and road experiments. After the parameter correction is completed and the same parameter correction is performed again, the vehicle body temperature can be calculated and outputted by virtual. The temperature inside the car can be used as feedback to control the air outlet mode, target air temperature and target wind, and automatically adjust the interior temperature.

As shown in Figure 2 and Figure 3, for the specific calculation process of the virtual interior temperature, first determine whether the external temperature sensor input is valid. If it is valid, calculate the external temperature compensation. If it is invalid, use the default external temperature compensation; then judge the sunlight. Whether the sensor input is valid, if it is valid, calculate the sun compensation. If it is invalid, use the default sun compensation; similarly, judge whether the engine water temperature, evaporator temperature, and mixing damper position feedback are valid. If it is effective, calculate the wind temperature. Calculate the wind temperature compensation. If it is invalid, use the default air temperature compensation. Similarly, determine whether the internal and external circulation damper position, mode damper position and blower voltage feedback are valid, and calculate the blower air volume and wind speed compensation. Whether the vehicle body temperature is valid or not, if it is valid, it is obtained that the output virtual vehicle interior temperature = vehicle body temperature + external temperature compensation + sunlight compensation + air temperature compensation + wind speed compensation.

It is worth noting that the above-mentioned judgment input or judgment feedback is valid, depending on the sensor of the corresponding component, such as the external temperature sensor, where the input value of the external temperature sensor is the ambient temperature mentioned in the parameter quantity. If the external temperature sensor is directly detected by the controller, it is determined whether the external temperature sensor is open or shorted by detecting the voltage to determine whether the external temperature sensor is normal. If not, the default external temperature compensation is used; if the external temperature is used; If the sensor input signal is coming through the bus, the bus fault flag is used to judge whether the external temperature sensor is normal. If it is not normal, the default external temperature compensation is used. The default external temperature compensation here is an average value measured in advance. The effect of using the default external temperature compensation is that if the external temperature sensor is not working properly, it will not cause the internal temperature calculation module to calculate the temperature inside the vehicle. Here, it is only the input judgment of the external temperature sensor and the interpretation using the default external temperature compensation. The above-mentioned solar sensor, engine water temperature, evaporator temperature and other discriminants follow this principle.

As shown in FIGS. 4-7, the external temperature compensation calculation curve, the solar compensation calculation curve diagram, the outlet temperature compensation calculation curve diagram, and the wind speed compensation calculation curve diagram obtained in the parameter modification experiment process of the present embodiment, It has been experimentally verified that the control method can accurately calculate the virtual interior temperature equal to the actual vehicle air temperature. Therefore, the present invention is more accurate than the conventional interior temperature sensor due to the consideration of a plurality of factors affecting the temperature variation inside the vehicle. And stable.

In this embodiment, the thermodynamic model is used to determine the influence of all detected external energy inputs as a numerical heat flow level, and the heat flow level is integrated into time to obtain a heat level, and then the heat level is combined with the external temperature compensation calculation curve. The virtual interior temperature can be obtained from the graph, the solar compensation calculation graph, the wind temperature compensation calculation graph, and the wind speed compensation calculation graph.

Embodiment 2: An automatic air conditioning controller for an automobile based on a built-in temperature detecting unit, as shown in FIG. 8, includes an air conditioner controller and a built-in temperature detecting unit connected to the air conditioner controller, and it should be noted that, in this embodiment, The built-in temperature detecting unit is different from the conventional in-vehicle temperature sensor. It can be any type of device that can realize the temperature detecting function, such as an infrared temperature sensor, a thermocouple or a thermistor. The built-in temperature detecting unit in this embodiment is The thermistor is installed on the panel of the air conditioner controller and away from the area of the heat generating component, so that the influence of the heat generating component on the panel of the air conditioner controller on the temperature detection can be avoided. Of course, the built-in temperature detecting unit in this embodiment can also It is installed on the black box of the air conditioner controller or connected to the independent components of the air conditioner controller by wire harness or the like.

The control strategy of the air conditioner controller includes an in-vehicle temperature calculation module, an in-vehicle temperature control module and an air outlet module, and the built-in temperature detecting unit transmits the acquired vehicle body temperature to the in-vehicle temperature calculation module, and the in-vehicle temperature calculation module. The temperature inside the virtual vehicle is calculated and sent to the temperature control module in the vehicle, and the temperature control module in the vehicle controls the air outlet of the air outlet module.

The air outlet module includes an air outlet mode control end, an air outlet temperature control end, and a blower control end, the air outlet mode control end controls the air outlet mode, the outlet air temperature control end controls the target air outlet temperature, and the blower control end controls the target wind speed. The air outlet module further includes an inner and outer circulation end for controlling the inner and outer circulations to realize automatic adjustment of the interior temperature.

The vehicle interior temperature calculation module includes a temperature correction end and a parameter interface end, the temperature correction end corrects and outputs the virtual vehicle interior temperature, and the parameter interface end is used to adjust various parameter corrections in the temperature correction end correction process, so that the temperature correction end outputs the virtual vehicle. The internal temperature is the same as the actually detected air temperature inside the vehicle, and the output virtual interior temperature feedback is used to control the air outlet mode, the target air outlet temperature, the target wind speed, and the internal and external circulation.

In this embodiment, under the condition that the in-vehicle temperature sensor is not used, the air temperature in the vehicle cannot be directly obtained by the measurement of the temperature sensor inside the vehicle, and the air temperature in the vehicle is used as the feedback of the temperature control module in the vehicle, and the temperature inside the vehicle is automatically controlled. Therefore, in this embodiment, the interior temperature is virtualized by the thermodynamic model, and then the subsequent internal temperature automatic control function is realized by the virtual interior temperature.

The parameter correction includes the following parameter quantities: ambient temperature, sunlight intensity, engine water temperature, evaporator temperature, mixing damper position, internal and external circulation damper position, mode damper position, and blower voltage. The calculation of the virtual interior temperature needs to consider all the factors in the vehicle. The energy input caused by the air temperature is sensed by an external temperature sensor, a sunlight sensor, an engine water temperature sensor, and an evaporator temperature sensor installed on the vehicle, and combined with the position of the mixing damper, the position of the inner and outer circulation dampers, the mode damper position, and The blower voltages, these influential energy inputs, calculate their effect on the temperature of the air inside the vehicle, resulting in a virtual interior temperature.

The influence of each external energy input on the air temperature inside the vehicle is determined by environmental simulation experiments and road experiments. After the parameter correction is completed and the same parameter correction is performed again, the vehicle body temperature can be calculated and outputted by virtual. The temperature inside the car can be used as feedback to control the air outlet mode, the target air temperature, the target wind, and the internal and external circulation to automatically adjust the interior temperature.

As shown in Figure 2 and Figure 3, for the specific calculation process of the virtual interior temperature, the interior temperature calculation module starts to work to determine whether the external temperature sensor input is valid. If it is valid, the external temperature compensation is calculated. If it is invalid, the default is used. External temperature compensation; then determine whether the sun sensor input is valid. If it is valid, calculate the sun compensation. If it is invalid, use the default sun compensation; similarly, judge whether the engine water temperature, evaporator temperature, and hybrid damper position feedback are valid. Then calculate the wind temperature, and then calculate the wind temperature compensation. If it is invalid, use the default air temperature compensation; similarly, determine whether the inner and outer circulation damper position, the mode damper position and the blower voltage feedback are valid, and calculate the blower air output. And the wind speed compensation, finally determine whether the temperature sensor input is valid, if it is valid, it is obtained, the output virtual vehicle interior temperature = vehicle body temperature + external temperature compensation + sunlight compensation + air temperature compensation + wind speed compensation.

It is worth noting that the above-mentioned judgment input or judgment feedback is valid, depending on the sensor of the corresponding component, such as the external temperature sensor, where the input value of the external temperature sensor is the ambient temperature mentioned in the parameter quantity. If the external temperature sensor is directly detected by the controller, it is determined whether the external temperature sensor is open or shorted by detecting the voltage to determine whether the external temperature sensor is normal. If not, the default external temperature compensation is used; if the external temperature is used; If the sensor input signal is coming through the bus, the bus fault flag is used to judge whether the external temperature sensor is normal. If it is not normal, the default external temperature compensation is used. The default external temperature compensation here is an average value measured in advance. The effect of using the default external temperature compensation is that if the external temperature sensor is not working properly, it will not cause the internal temperature calculation module to calculate the temperature inside the vehicle. Here, only the input judgment of the external temperature sensor and the use of the default external temperature compensation are explained. The above-mentioned solar sensor, engine water temperature, evaporator water temperature and the like all follow this principle.

By using the virtual interior temperature as feedback for the in-vehicle temperature control module, it can realize the automatic control function of all vehicle air conditioners, ensuring the comfort of the environment inside the cabin and the rapidity, stability and accuracy of the air temperature control inside the vehicle. It saves the cost of the traditional in-vehicle temperature sensor and its associated piping, fan, motor and wiring harness, and does not require any external sensor probe to detect the temperature of the air inside the cabin, ensuring the aesthetic requirements of the air conditioner controller.

The above is a preferred embodiment of the present invention, and any obvious modifications and substitutions are possible without departing from the spirit and scope of the invention.

Claims

The automobile automatic air conditioning control method based on the built-in temperature detecting unit is characterized in that it comprises the following steps: A, obtaining the vehicle body temperature; B, calculating and outputting the virtual temperature equal to the actual vehicle air temperature by acquiring the vehicle body temperature The temperature inside the car; C, according to the temperature inside the virtual car, control the wind.
The automobile automatic air conditioning control method based on the built-in temperature detecting unit according to claim 1, wherein the step B further comprises a parameter correcting step, when the obtained vehicle body temperature and the actually detected interior air temperature are obtained. If the error is greater than the tolerance error range, the corresponding parameters are adjusted and the virtual interior temperature is output; when the obtained vehicle body temperature and the actually detected interior air temperature have an error less than the tolerance error range, no parameters are required. Adjust to output the virtual interior temperature.
The method according to claim 2, wherein the tolerance error range is “-1.5° C. to 1.5° C.”.
The method according to claim 2, wherein the parameter correction comprises the following parameter quantities: ambient temperature, sunlight intensity, engine water temperature, evaporator temperature, mixing damper position, Internal and external circulation damper position, mode damper position and blower voltage.
The method according to claim 2, wherein the step C specifically comprises:

C1, controlling the wind mode;

C2, controlling the target outlet air temperature;

C3, control the target wind.
An automotive automatic air conditioning controller based on a built-in temperature detecting unit, comprising: an air conditioning controller and a built-in temperature detecting unit connected to the air conditioner controller.
The automotive automatic air conditioning controller based on the built-in temperature detecting unit according to claim 6, wherein the control strategy of the air conditioner controller includes an interior temperature calculation module, an interior temperature control module, and an air outlet module. The built-in temperature detecting unit sends the acquired vehicle body temperature to the in-vehicle temperature calculation module, and the in-vehicle temperature calculation module calculates the virtual vehicle interior temperature to be sent to the in-vehicle temperature control module, and the in-vehicle temperature control module controls the outlet module to output wind.
The automobile automatic air conditioning controller based on the built-in temperature detecting unit according to claim 7, wherein the air outlet module comprises an air outlet mode control end for controlling an air outlet mode, and an air outlet temperature control for controlling a target air outlet temperature. The end and the blower control end that controls the target wind.
The automotive automatic air conditioning controller based on the built-in temperature detecting unit according to claim 8, wherein the air outlet module further comprises an inner and outer loop control end for controlling internal and external circulation.
The automotive automatic air conditioning controller based on the built-in temperature detecting unit according to claim 7, wherein the in-vehicle temperature calculation module comprises a temperature correction end and a parameter interface end, and the temperature correction end corrects and outputs the actual vehicle. The virtual interior temperature is equal to the internal air temperature, and the parameter interface end is used to adjust various parameter corrections in the temperature correction end correction process.
The automotive automatic air conditioning controller based on the built-in temperature detecting unit according to claim 10, wherein the parameter correction comprises the following parameter quantities: ambient temperature, sunlight intensity, engine water temperature, evaporator temperature, mixing damper position, Internal and external circulation damper position, mode damper position and blower voltage.