A vehicle, an air conditioner control method and device

Abstract

The present invention belongs to the technical field of vehicle air-conditioning regulation, and particularly relates to a vehicle, an air-conditioning regulation method and a device. The present invention regulates the opening and closing of the air-conditioning compressor. Before the vehicle enters a high-power working condition section, the air-conditioning compressor is first controlled to work to appropriately reduce the temperature inside the vehicle. After entering the high-power working condition section, if there is a lack of power, the air-conditioning compressor can be controlled to turn off to meet the power demand of the vehicle. Since the engine does not need to drive the air-conditioning compressor during the high-power working condition stage, a small-horsepower engine can be used to meet the power demand of the whole vehicle, achieving the balance between economy and power performance. Moreover, due to the early implementation of the cooling action, even if the temperature inside the vehicle rises due to turning off the air-conditioning compressor when passing through this high-power working condition section, the final temperature inside the vehicle can still be in a relatively comfortable state, achieving the balance between the power performance and comfort of the whole vehicle.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle air conditioning regulation, and in particular relates to a vehicle and air conditioning regulation method and device. Background Art

[0002] The rapid development of high-speed rail and the popularization of private cars have reduced the profit margins of the passenger transport market. In order to enable customers to obtain greater economic benefits, various OEMs are also constantly developing new technologies or optimizing vehicle configurations to reduce the cost of the vehicle itself and increase customer profits.

[0003] In terms of optimizing vehicle configuration, many manufacturers also start from the engine operating area and operating conditions. On the premise of meeting the conventional power needs of the vehicle, they try to reduce the engine power as much as possible and choose a smaller horsepower engine, thereby reducing the fuel consumption throughout the vehicle's life cycle and creating more value for users. However, when a small horsepower engine is used, it will be underpowered when encountering some special working conditions. The most prominent manifestation is that when the air conditioner is turned on during high temperatures in summer and encounters uphill conditions, the small horsepower engine cannot meet the power requirements of the vehicle. If the air conditioner compressor is turned off under uphill conditions, the comfort will be poor. How to achieve a balance between the economy, power and comfort of the vehicle is an urgent problem to be solved. Summary of the invention

[0004] The present invention provides a vehicle and air conditioning control method and device, which are used to solve the problem that the prior art cannot balance the economy, power and comfort of the whole vehicle.

[0005] In order to solve the above technical problems, the technical solutions included in the present invention and the beneficial effects corresponding to the technical solutions are as follows:

[0006] The present invention provides a vehicle air conditioning control method, comprising the following steps:

[0007] 1) obtaining the current position information of the vehicle and the road condition information around the vehicle, and determining whether there is a high-power operating condition section within a set range ahead of the vehicle's driving direction, and the time period corresponding to the high-power operating condition section is the high-power operating condition stage;

[0008] 2) If there is a high-power section within a set range ahead of the vehicle's driving direction, predict whether the vehicle will experience insufficient power when passing through the high-power section;

[0009] 3) If the pre-judgment result is that power shortage will occur in the large power working condition section, estimate the temperature rise inside the vehicle when passing through the large power working condition section with the air-conditioning compressor turned off; based on the temperature rise, pre-judge whether the temperature inside the vehicle in the large power working condition stage will exceed the upper limit of the set comfort temperature. If the pre-judgment result is that it will exceed the upper limit of the set comfort temperature, then before the vehicle enters the large power working condition stage, control the air-conditioning compressor to operate so that the temperature inside the vehicle is lower than the upper limit of the set comfort temperature;

[0010] 4) When the vehicle is in the large power working condition stage, if the actual operation of the vehicle shows a power shortage situation, control to turn off the air-conditioning compressor.

[0011] The beneficial effects of the above technical solution are as follows: The present invention regulates the turning on and off of the air-conditioning compressor. Before the vehicle enters the large power working condition section, first control the air-conditioning compressor to operate to appropriately lower the temperature inside the vehicle. After entering the large power working condition section, if a power shortage situation occurs, the air-conditioning compressor can be controlled to turn off to meet the power demand of the vehicle. Since the engine does not need to drive the air-conditioning compressor during the large power working condition stage, a small-horsepower engine can be used to meet the power demand of the whole vehicle, achieving the balance between economy and power performance. Moreover, due to the pre-cooling action, even if the temperature inside the vehicle rises due to turning off the air-conditioning compressor when passing through the large power working condition section, the final temperature inside the vehicle can still be in a relatively comfortable state, achieving the balance between the power performance and comfort of the whole vehicle.

[0012] Further, the large power working condition section is an uphill section, and the corresponding large power working condition stage is the uphill stage; in step 2), if the following situation occurs, pre-judge that the vehicle will have a power shortage when passing through the large power working condition section: Determine the required power based on the slope and length of the uphill section. The current power is less than the required power and the vehicle has the behavior of turning off the air-conditioning compressor when passing through the large power working condition section in its historical journey.

[0013] Further, in order to ensure that the temperature inside the vehicle is appropriate, in step 3), control the air-conditioning compressor to operate so that the temperature inside the vehicle is also lower than the current air-conditioning set temperature, and the degree of reduction is the first set temperature, and the current air-conditioning set temperature is lower than the upper limit of the set comfort temperature; the first set temperature is greater than 0.

[0014] Further, in order to accurately judge whether the vehicle has a power shortage situation, in step 4), if the following situation occurs, it is determined that the actual operation of the vehicle has a power shortage situation: The throttle pedal opening is greater than the set throttle opening threshold, the engine load rate is greater than the set load rate threshold, and the engine speed is in a gradually decreasing state.

[0015] Further, to balance the vehicle's power performance and comfort, in step 4), when the vehicle is in the high-power working condition stage, if the air-conditioning compressor has been turned off, the vehicle interior temperature also needs to be detected: if the vehicle interior temperature exceeds the set air-conditioning turning-on temperature and the exceeding degree is greater than or equal to the second set temperature, then control the air-conditioning compressor to turn on after a delay of T seconds; if the vehicle interior temperature exceeds the set air-conditioning turning-on temperature and the exceeding degree is less than the second set temperature, then keep the air-conditioning compressor in the off state; the second set temperature is greater than 0.

[0016] Further, after step 4), if the vehicle has passed through the high-power working condition section, the vehicle interior temperature needs to be detected: if the vehicle interior temperature exceeds the set air-conditioning turning-on temperature, control the air-conditioning compressor to be in the on state; otherwise, control the air-conditioning compressor to be in the off state.

[0017] Further, to accurately obtain the vehicle's current position information and the road conditions information around the vehicle, in step 1), use GPS to obtain the vehicle's current position information and use the ADAS map to obtain the road conditions information around the vehicle.

[0018] The present invention also provides a vehicle air-conditioning control device, including a memory and a processor, and the processor is used to execute the instructions stored in the memory to implement the vehicle air-conditioning control method introduced above and achieve the same effect as this method.

[0019] The present invention also provides a vehicle, including an air conditioner, and also including a memory and a processor, and the processor is used to execute the instructions stored in the memory to implement the vehicle air-conditioning control method introduced above and achieve the same effect as this method. Description of the Drawings

[0020] Figure 1 is a connection schematic diagram of each module in the vehicle of the present invention;

[0021] Figure 2 is a flowchart of the vehicle air-conditioning control method of the present invention;

[0022] Figure 3 is a structural diagram of the vehicle air-conditioning control device of the present invention. Detailed Embodiments

[0023] The basic concept of a vehicle air-conditioning control method of the present invention is as follows: A small-horsepower engine is selected. In response to the high-temperature environment in summer, before the vehicle enters a high-power working condition section, the interior of the vehicle is appropriately cooled in advance. Then, when the vehicle is in the high-power working condition stage, if the vehicle power is significantly insufficient, the air-conditioning compressor can be temporarily turned off, and the small-horsepower engine can be used to meet the power demand of the whole vehicle, enabling the vehicle to pass through this high-power working condition section. Moreover, even when the interior temperature rises due to the shutdown of the air-conditioning compressor, the interior temperature remains within a comfortable range, thus achieving a balance among the economy, power performance, and comfort of the whole vehicle.

[0024] The following will introduce and explain a vehicle, a vehicle air-conditioning control method, and a vehicle air-conditioning control device of the invention in conjunction with the accompanying drawings and embodiments.

[0025] Vehicle embodiment:

[0026] A vehicle embodiment of the present invention includes a vehicle body and each module as shown in Figure 1 The modules are respectively an air-conditioning controller, a control strategy controller, a map controller, a GPS positioning module, and an engine ECU. Figure 1 The air-conditioning controller is used to send the compressor state and the interior temperature information to the control strategy controller.

[0027] The GPS positioning module is used to obtain the current position information of the vehicle and send it to the map controller.

[0028] The map controller is used to obtain the current driving road condition information (including information such as uphill / downhill, turning, and traffic congestion on the road) using the ADAS map based on the current position information of the vehicle, and when it is found that there is a high-power working condition section within a set range in front of the vehicle driving direction, inform the control strategy controller of the basic situation of the high-power working condition section. For example, if the high-power working condition section is an uphill section, the map controller needs to send information such as the slope and length of the uphill section to the control strategy controller.

[0029] The engine ECU is used to send information such as the engine speed, throttle pedal opening, and engine load rate to the control strategy controller.

[0030] The control strategy controller is used to analyze and process the information sent by the air-conditioning controller, the engine ECU, and the map controller, and send an air-conditioning start / stop control instruction to the air-conditioning controller according to the processing result, so that the air-conditioning controller controls the operation of the air-conditioning compressor according to this instruction. The whole process of data analysis, processing, and control is a vehicle air-conditioning control method of the present invention. The following will specifically introduce in conjunction with

[0031] and Figure 2 as follows.

[0032] Step 1: Use the GPS module to obtain the current location information of the vehicle and send it to the map controller module. According to the current location information, the map controller module uses the ADAS map to obtain the current driving road conditions information and determines whether there is a high-power working condition section within S1 kilometers ahead of the vehicle. In this embodiment, the high-power working condition section is an uphill section, and the corresponding time period for climbing this uphill section is the uphill stage. When there is an uphill section, use the ADAS map to obtain information such as the slope and length of the uphill section.

[0033] Step 2: The control strategy controller estimates whether the current power of the vehicle can meet the slope power demand (the power required to climb this uphill section) based on the slope and length of the uphill section; conduct a historical data query to check whether there is a behavior of turning off the air-conditioning compressor when passing through this uphill section during the vehicle's historical journey. If it is estimated that the current power of the vehicle cannot meet the slope power demand and there is a behavior of turning off the air-conditioning compressor when passing through this uphill section during the historical journey, it means that the vehicle power is insufficient, and it is predicted as insufficient uphill power, and then execute Step 3; if it is estimated that the current power of the vehicle can meet the slope power demand or there is no behavior of turning off the air-conditioning compressor when passing through this uphill section during the historical journey, directly execute Step 4.

[0034] Among them, the following method can be used to estimate whether the current power of the vehicle can meet the slope power demand:

[0035] 1) Assume that the engine does not provide power and the vehicle travels at the current speed, then the resistance received by the vehicle is:

[0036]

[0037] Among them, r w is the wheel radius; m veh is the vehicle mass; θ is the road slope angle; C d is the air resistance coefficient; A is the vehicle frontal area; v x is the vehicle speed at time x.

[0038] The resulting acceleration is:

[0039]

[0040] 2) Assume that the speed before going uphill is v0 and the speed after the slope is v t , and it is required that v t ≥v0 - 5. To meet the power demand, according to the kinetic energy theorem, there is:

[0041]

[0042] Among them, T engis the vehicle torque; i0 is the final drive ratio; i g is the transmission ratio; s ramp is the total slope length; s is a small section of the slope length.

[0043] If the torque range of the engine is set to 1300 N.m to 2100 N.m, and the maximum value of the torque is taken in the above formula, then only v in the above formula t is the unknown. If the estimated v t cannot meet v t ≥ v0 - 5, it is considered that the vehicle power in the current cycle cannot meet the power demand.

[0044] Step 3, when the prediction result of the control strategy controller is insufficient uphill power, estimate the temperature rise inside the vehicle when the vehicle passes through the uphill section with the air-conditioning compressor turned off, and estimate whether the temperature inside the vehicle during the uphill stage will exceed the set comfort temperature upper limit (for example, 30 °C, generally the air-conditioning calibration value) based on the temperature rise inside the vehicle during the uphill stage and the current vehicle temperature. If it is estimated that the temperature during the uphill stage exceeds the set comfort temperature upper limit, then before going uphill, an instruction needs to be sent to the air-conditioning controller to make the air-conditioning controller control the air-conditioning to refrigerate and cool the vehicle interior appropriately. For example, control the air-conditioning compressor to work with the goal of decreasing by 2 °C based on the current air-conditioning set temperature to reduce the impact on comfort caused by turning off the air-conditioning compressor during the uphill stage.

[0045] Step 4, further determine whether the vehicle has entered the uphill section through the GPS module and ADAS map information, and when it is determined that the vehicle has entered the uphill section, obtain information such as the throttle pedal opening, engine load, and engine speed through the engine ECU, and determine whether the throttle pedal opening is greater than 95%, the engine load rate is greater than 90%, and the engine speed is gradually decreasing. If all these three conditions are met, it means that there is obvious insufficient power during the uphill stage of the vehicle. Then, during this uphill stage, the control strategy controller sends an instruction to the air-conditioning controller to make the air-conditioning controller control to turn off the air-conditioning compressor to increase the engine power.

[0046] Step 5, during the uphill stage, if the air-conditioning compressor has been turned off at this time, it is also necessary to judge the temperature inside the vehicle: if the temperature inside the vehicle has reached the set air-conditioning turning-on temperature (set by the user and can be set according to requirements), but has not reached the set air-conditioning turning-on temperature + 2 °C, then keep the air-conditioning compressor turned off; if the temperature inside the vehicle has reached the set air-conditioning turning-on temperature + 2 °C, then remind the driver through the instrument that the air-conditioning compressor is about to turn on, and it is recommended to downshift and climb the slope, and turn on the air-conditioning compressor after T seconds.

[0047] Step 6: Determine whether the vehicle has exited the uphill section through the GPS module and ADAS map information. When it is determined that the vehicle has exited the uphill section, record the vehicle's uphill behavior, the on / off operation of the air-conditioning compressor, the vehicle's gear-shifting behavior, etc. as reference data for the historical journey. Moreover, during this process, it is also necessary to continue to judge the temperature inside the vehicle: if the temperature inside the vehicle has reached the set air-conditioning turning-on temperature, turn on the air-conditioning compressor; if the temperature inside the vehicle has not reached the set air-conditioning turning-on temperature, turn off the air-conditioning compressor.

[0048] Through the adjustment and control of the air-conditioning compressor in the above-mentioned various stages, a small-displacement engine can be used to complete the driving on various high-power working condition sections, achieving the balance between economy and power performance; moreover, even when the air-conditioning compressor is turned off during the high-power working condition stage, the final temperature inside the vehicle can still be in a comfortable state, achieving the balance between power performance and comfort.

[0049] In this embodiment, the high-power working condition section is an uphill section. As other implementation manners, the method of the present invention can also be used to achieve the balance of the vehicle's power performance, economy and comfort for other high-power working condition sections. For example, if the driver suddenly steps on the accelerator and the vehicle throttle opening > 95%, the engine load rate exceeds 90%, and the engine speed remains unchanged or even decreases, it is considered that the driving section is a high-power working condition section and there is a situation of insufficient power.

[0050] Method embodiment:

[0051] A vehicle air-conditioning regulation method of the present invention has a flow as Figure 2 shown. As a vehicle air-conditioning regulation method introduced in the vehicle embodiment, it will not be elaborated here.

[0052] Device embodiment:

[0053] An embodiment of a vehicle air-conditioning regulation device of the present invention, as Figure 3 shown, includes a memory, a processor and an internal bus. The processor and the memory complete mutual communication and data interaction through the internal bus. The memory includes at least one software function module stored in the memory. The processor executes various function applications and data processing by running the software programs and modules stored in the memory, and realizes a vehicle air-conditioning regulation method introduced in the vehicle embodiment of the present invention.

[0054] Among them, the processor can be a microprocessor MCU, a programmable logic device FPGA and other processing devices, such as the control strategy controller introduced in the system embodiment.

[0055] The memory can be various types of memories that store information using electrical energy, such as RAM, ROM, etc.; it can also be various types of memories that store information using magnetic energy, such as hard disks, floppy disks, magnetic tapes, magnetic core memories, bubble memories, USB flash drives, etc.; it can also be various types of memories that store information using optical methods, such as CDs, DVDs, etc.; of course, it can also be other types of memories, such as quantum memories, graphene memories, etc.

Claims

1. A vehicle air-conditioning control method, characterized in that, The method includes the following steps: 1) Obtain the current position information of the vehicle and the road condition information around the vehicle, and determine whether there is a high-power working condition section within a set range in front of the driving direction of the vehicle. The time period corresponding to the high-power working condition section is the high-power working condition stage; 2) If there is a high-power working condition section within the set range in front of the driving direction of the vehicle, predict whether the vehicle will have insufficient power when passing through the high-power working condition section; 3) If the prediction result is that there will be insufficient power in the high-power working condition section, estimate the temperature rise inside the vehicle when the vehicle passes through the high-power working condition section with the air-conditioning compressor turned off; according to the temperature rise, predict whether the temperature inside the vehicle will exceed the upper limit of the set comfort temperature during the high-power working condition stage. If the prediction result is that it will exceed the upper limit of the set comfort temperature, then before the vehicle enters the high-power working condition stage, control the air-conditioning compressor to operate so that the temperature inside the vehicle is lower than the upper limit of the set comfort temperature; 4) When the vehicle is in the high-power working condition stage, if the vehicle actually has insufficient power during operation, control to turn off the air-conditioning compressor.

2. The vehicle air-conditioning control method according to claim 1, characterized in that, The high-power working condition section is an uphill section, and the corresponding high-power working condition stage is the uphill stage; in step 2), if the following conditions occur, it is predicted that the vehicle will have insufficient power when passing through the high-power working condition section: determine the required power according to the slope and length of the uphill section, the current power is less than the required power, and the vehicle has the behavior of turning off the air-conditioning compressor when passing through the high-power working condition section in its historical journey.

3. The vehicle air-conditioning control method according to claim 1, wherein In step 3), control the air-conditioning compressor to operate so that the temperature inside the vehicle is also lower than the current air-conditioning set temperature, and the degree of reduction is the first set temperature, and the current air-conditioning set temperature is lower than the upper limit of the set comfort temperature; the first set temperature is greater than 0.

4. The vehicle air-conditioning control method according to claim 1, characterized in that, In step 4), if the following conditions occur, it is determined that the vehicle actually has insufficient power during operation: the throttle pedal opening is greater than the set throttle opening threshold, the engine load rate is greater than the set load rate threshold, and the engine speed is in a gradually decreasing state.

5. The vehicle air-conditioning control method according to claim 1, wherein In step 4), when the vehicle is in the high-power working condition stage, if the air-conditioning compressor has been turned off, the temperature inside the vehicle needs to be detected: if the temperature inside the vehicle exceeds the set air-conditioning turning-on temperature and the degree of exceeding is greater than or equal to the second set temperature, then control to turn on the air-conditioning compressor after a delay of T seconds; If the temperature inside the vehicle exceeds the set air-conditioning turning-on temperature and the degree of exceeding is less than the second set temperature, then keep the air-conditioning compressor in the off state; the second set temperature is greater than 0.

6. The vehicle air-conditioning control method according to claim 1, wherein, After step 4), if the vehicle has passed through the high-power working condition section, the temperature inside the vehicle needs to be detected: if the temperature inside the vehicle exceeds the set air-conditioning turning-on temperature, control the air-conditioning compressor to be in the on state; otherwise, control the air-conditioning compressor to be in the off state.

7. The vehicle air-conditioning control method according to any one of claims 1 to 6, characterized in that, In step 1), use GPS to obtain the current position information of the vehicle, and use the ADAS map to obtain the road condition information around the vehicle.

8. A vehicle air-conditioning control device, characterized in that, It includes a memory and a processor, and the processor is used to execute the instructions stored in the memory to implement the vehicle air-conditioning control method according to any one of claims 1 to 7.

9. A vehicle, characterized in that, It includes an air conditioner, and also includes a memory and a processor. The processor is configured to execute instructions stored in the memory to implement the vehicle air conditioner control method according to any one of claims 1 to 7.

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