JP2010100144A - Vehicular air-conditioner control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compatibly prevent a glass from being fogged, and save the power. <P>SOLUTION: The result of detection of an outside air temperature sensor is obtained (100), the engine stop time for glass fogging, the engine stop time for odor prevention, and the engine stop time for comfortableness are respectively calculated from the obtained result of detection of the outside air temperature sensor (108-112). Since the larger the amount of solar radiation is, the glass temperature is higher than the amount of solar radiation is smaller; and if the humidity in a cabin is same, glass fogging hardly occurs. Thus, by using the function or the map for calculating the glass fogging stop time set so that the engine stop time is longer as the amount of solar radiation is larger, the engine stop time is calculated. After the engine is stopped, and the minimum engine stop time among the calculated engine stop times is elapsed, the engine start request is made (114-126). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle air-conditioning control device, and more particularly, to a vehicle air-conditioning control device mounted on a vehicle to save power by stopping an engine while the vehicle is stopped, such as waiting for a signal.

  As a vehicle air conditioner mounted on a vehicle that saves power by stopping the engine while stopping at a signal or the like, the techniques described in Patent Documents 1 to 3 have been proposed.

  In the techniques described in Patent Documents 1 and 2, by bypassing the evaporator and forming a bypass passage for flowing air, the amount of air flowing through the bypass passage is adjusted while the air mix door is fixed at the maximum cooling position. It has been proposed to save power by extending the engine stop time by storing cool air in the evaporator and allowing the evaporator to cool when the engine is stopped. In addition, it is described that the compressor is driven by restarting the engine when the blowing temperature becomes higher than the temperature of the perception limit point at which the odor generation and cloudiness that are set low are not felt as the amount of solar radiation increases.

Further, in the technique described in Patent Document 3, it is proposed to set the engine stop time according to the blowing mode. In the case of heating, the engine stop time is set longer as the amount of solar radiation is larger. In some cases, the higher the amount of solar radiation, the hotter it feels, so the longer the amount of solar radiation, the shorter the engine stop time.
JP 2001-71734 A JP 2008-81121 A JP 2008-138622 A

  However, in the technologies described in Patent Documents 1 to 3, the engine stop time is shortened as the amount of solar radiation increases during cooling, and there is room for improvement in terms of preventing glass fogging and saving power.

  The present invention has been made in consideration of the above-described facts, and an object thereof is to achieve both prevention of fogging of glass and power saving.

  In order to achieve the above object, the invention described in claim 1 includes an acquisition unit that acquires a detection result of the solar radiation amount detection unit that detects the solar radiation amount, and a compressor that operates the engine as a drive source to compress the refrigerant. A memory for storing a function or map that is set in advance so that the longer the amount of solar radiation, the longer the engine stop time from when the vehicle interior is air-conditioned by the air-conditioning means until the fogging of the glass occurs. The vehicle interior is air-conditioned by the means, the amount of solar radiation acquired by the acquisition means, the calculation means for calculating the engine stop time based on the function or map stored in the storage means, and the air-conditioning means. The engine is stopped by an engine control means for controlling start and stop of the engine according to the driving state of the vehicle, and the calculation means Thus when the engine stop time calculated has elapsed, is characterized by comprising control means for controlling said engine control means so as to start the engine, the.

  According to the first aspect of the present invention, the acquisition means acquires the detection result of the solar radiation amount detecting means for detecting the solar radiation amount.

  The storage means includes a function or map set in advance so that the engine stop time from when the vehicle interior is air-conditioned by the air-conditioning means until the fogging of the glass occurs becomes longer as the amount of solar radiation increases. It is remembered. That is, when the air conditioner is operated by operating the compressor, if the engine is stopped, the compressor is stopped, so that the glass is easily fogged. Therefore, a preset function or map is stored as the engine stop time until the glass fogging occurs. At this time, if the amount of solar radiation is large, the glass is less likely to be clouded. Therefore, a function or map in which the engine stop time is set longer as the amount of solar radiation is larger is stored in the storage means.

  The calculating means calculates the engine stop time based on the amount of solar radiation acquired by the acquiring means and the function or map stored in the storage means.

  Then, in the control means, when the vehicle interior is air-conditioned by the air-conditioning means, the engine is stopped by the engine control means for controlling start and stop of the engine according to the driving state of the vehicle, and the calculation means calculates The engine control means is controlled to start the engine when the engine stop time has elapsed.

  In other words, the engine stop time is calculated using a function or map that is set longer as the amount of solar radiation increases until the amount of solar radiation increases, so the engine stop time is reduced while preventing the glass from fogging. Can be long. Therefore, it is possible to achieve both prevention of fogging of the glass and power saving even in the case of cooling.

  According to a second aspect of the present invention, the amount of solar radiation detecting means for detecting the amount of solar radiation, the acquiring means for acquiring the detection result of the outside air temperature detecting means for detecting the outside air temperature, and the refrigerant is compressed by operating with the engine as a driving source. The engine stop time from when the vehicle interior is air-conditioned by the air conditioning means equipped with a compressor to the time when the cloudiness of the glass occurs becomes longer according to the outside air temperature so as to increase as the amount of solar radiation increases. Function or map relating to glass fog prevention, function or map relating to odor prevention set in advance according to the outside air temperature from when the engine is stopped until odor is generated, and until the comfort is impaired after the engine is stopped A storage means for storing a function or map relating to comfort set in advance according to the outside air temperature, First calculation means for calculating the engine stop time for preventing glass fogging based on the solar radiation amount and the outside air temperature acquired by the acquisition means, and the function or map related to the glass fog prevention stored in the storage means; A second calculating means for calculating the engine stop time for preventing the odor based on the outside air temperature acquired by the acquiring means and the function or map relating to the odor prevention stored in the storage means; and the acquiring means Third calculation means for calculating the engine stop time for maintaining comfort based on the acquired outside air temperature and a function or map related to comfort stored in the storage means; and the first to third calculations Of the calculation results of the means, the selecting means for selecting the minimum engine stop time and the air conditioning means The engine is stopped by an engine control means for controlling start and stop of the engine according to the driving state of the vehicle, and the engine is stopped when the engine stop time selected by the selection means has elapsed. And control means for controlling the engine control means so as to start.

  According to the invention described in claim 2, the acquisition means acquires the detection results of the solar radiation amount detection means for detecting the solar radiation amount and the outside air temperature detection means for detecting the outside air temperature.

  The storage means has an engine stop time from when the engine is stopped until the cloudiness of the glass occurs when the vehicle interior is air-conditioned by an air-conditioning means that operates with the engine as a drive source and compresses the refrigerant. Function or map for preventing glass fogging set in advance according to the outside temperature so that the longer it is, the function for preventing odor that is set in advance according to the outside temperature until the engine stops after the engine stops Alternatively, a map and a function or map relating to comfort set in advance in accordance with the outside air temperature are stored in accordance with the engine stop time from when the engine stops until comfort is lost.

  That is, when the air conditioner is operated by operating the compressor, if the engine is stopped, the compressor is stopped, so that the glass is easily fogged. Therefore, a preset function or map is stored as the engine stop time until the glass fogging occurs. At this time, if the amount of solar radiation is large, the glass is less likely to be clouded. Therefore, a function or map set according to the outside air temperature is stored in the storage means so that the engine stop time becomes longer as the amount of solar radiation increases. Further, when the compressor stops, odor is generated and comfort is impaired. Therefore, a function or map in which the engine stop time until the odor is generated is stored in advance, and a function or map in which the engine stop time until the comfort is impaired is stored.

  Further, the first calculation means calculates the engine stop time based on the solar radiation amount and the outside air temperature acquired by the acquisition means, and the function or map stored in the storage means, and the second calculation means by the acquisition means Based on the acquired outside air temperature and the function or map related to odor prevention stored in the storage means, the engine stop time for preventing the odor is calculated, and in the third calculating means, the outside air temperature acquired by the acquiring means, and An engine stop time for maintaining comfort is calculated based on a function or map related to comfort stored in the storage means.

  The selecting means selects the minimum engine stop time from the calculation results of the first to third calculating means, and the control means selects the vehicle operating state when the vehicle interior is air-conditioned by the air-conditioning means. Accordingly, the engine is controlled by engine control means for controlling start and stop of the engine, and the engine control means is controlled to start the engine when the engine stop time selected by the selection means has elapsed.

  In other words, the engine stop time is calculated using a function or map that is set longer as the amount of solar radiation increases until the amount of solar radiation increases, so the engine stop time is reduced while preventing the glass from fogging. Can be long. In addition, since the engine stop time is determined from the viewpoints of odor prevention and comfort, it is possible not only to prevent fogging of the glass and power saving, but also to prevent odor and maintain comfort.

  In addition, as in the third aspect of the present invention, it further includes a calculation means for calculating the target outlet temperature of the air-conditioning means, and the storage means replaces a function or map relating to comfort preset according to the outside air temperature. In addition, the engine stop time from the engine stop until the comfort is impaired stores a function or map relating to the comfort set in advance according to the target blow temperature, and the third calculation means calculates the target blow calculated by the calculation means. The engine stop time for maintaining comfort may be calculated based on the temperature and the function or map related to comfort stored in the storage means. As a result, it is possible not only to prevent fogging of the glass and power saving, but also to prevent odors and maintain comfort.

  As described above, according to the present invention, when the amount of solar radiation is large, it is difficult for the glass to be clouded.As the amount of solar radiation is large, the engine stop time is calculated using a function or map in which the engine stop time is set longer. By controlling the engine stop time, it is possible to lengthen the engine stop time while preventing the glass from fogging. Therefore, there is an effect that it is possible to achieve both the prevention of glass fogging and power saving.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a vehicle air conditioner according to an embodiment of the present invention. The vehicle air conditioner 10 according to the embodiment of the present invention is applied to a vehicle air conditioner mounted on a vehicle that travels by the power of an internal combustion engine such as an engine, a hybrid vehicle that includes an engine and a motor, or the like. be able to.

  In the vehicle air conditioner 10, a refrigerant cycle including a compressor 14, a condenser 16, an expansion valve 18, and an evaporator 20 constitutes a refrigeration cycle.

  The evaporator 20 cools the air passing through the evaporator 20 (hereinafter referred to as air after the evaporator) by vaporizing the compressed and liquefied refrigerant. At this time, the evaporator 20 cools the passing air so as to condense moisture in the air, thereby dehumidifying the air after the evaporator 20.

  The expansion valve 18 provided on the upstream side of the evaporator 20 supplies the refrigerant to the evaporator in a mist state by rapidly depressurizing the liquefied refrigerant. The vaporization efficiency of the refrigerant is improved.

  In the present embodiment, the compressor 14 of the vehicle air conditioner 10 compresses the refrigerant by a compressor that is mechanically driven using the power of the vehicle and circulates the refrigerant cycle.

  The evaporator 20 of the vehicle air conditioner 10 is provided inside the air conditioning duct 38. The air conditioning duct 38 is open at both ends, and air intake ports 40 and 42 are formed at one opening end. Further, a plurality of air outlets 44 (44A, 44B, and 44C are shown as an example in the present embodiment) that are opened toward the vehicle interior are formed at the other opening end.

  The air inlet 42 communicates with the outside of the vehicle and can introduce outside air into the air conditioning duct 38. Further, the air intake port 40 communicates with the passenger compartment so that air (inside air) in the passenger compartment can be introduced into the air conditioning duct 38. The air outlet 44 is, for example, a defroster outlet 44A that blows out air toward the windshield glass, a side and center register outlet 44B, and a foot outlet 44C.

  A blower fan 46 is provided in the air conditioning duct 38 between the evaporator 20 and the air intake ports 40 and 42. A mode switching damper 48 is provided in the vicinity of the air intake ports 40 and 42. The mode switching damper 48 opens and closes the air intake ports 40 and 42 by the operation of an actuator such as the mode switching damper motor 24.

  The blower fan 46 is rotated by driving the blower motor 22, sucked into the air conditioning duct 38 from the air intake port 40 to the air intake port 42, and further sends this air toward the evaporator 20. At this time, outside air or inside air is introduced into the air conditioning duct 38 in accordance with the open / close state of the air intake ports 40 and 42 by the mode switching damper 48. That is, the mode switching damper 48 switches between the inside air circulation mode and the outside air introduction mode.

  An air mix damper 50 and a heater core 52 are provided downstream of the evaporator 20. The air mix damper 50 is rotated by driving the air mix damper motor 36 to adjust the amount of air after the evaporator 20 that passes through the heater core 52 and the amount that bypasses the heater core 52. The heater core 52 circulates engine coolant and heats the air guided by the air mix damper 50 with the engine coolant.

  The air after the evaporator 20 is guided to the heater core 52 according to the opening degree of the air mix damper 50 and heated, and further mixed with the air not heated by the heater core 52 and then sent to the air outlet 44. Is done. In the vehicle air conditioner 10, the air mix damper 50 is controlled to adjust the amount of air heated by the heater core 52, thereby adjusting the temperature of the air blown out from the air blowing port 44 toward the vehicle interior.

  In the vicinity of each air outlet 44, an outlet switching damper 54 is provided correspondingly. In the vehicle air conditioner 10, the air outlets 44 </ b> A, 44 </ b> B, and 44 </ b> C are opened and closed by the outlet switching damper 54, so that the temperature-adjusted air can be blown from a desired position into the vehicle interior.

  The vehicle air conditioner 10 also includes an air conditioner ECU (Electronic Control Unit) 11 for performing various controls of the vehicle air conditioner 10. The air conditioner ECU 11 includes the blower motor 22, the mode switching damper motor 24, the air mix damper motor 36, the outlet switching damper motor 34, the compressor 14, the outside air temperature sensor 32, the inside air temperature sensor 30, and the solar radiation sensor 28. In addition to being connected, an operation unit 15 for performing various operations of the vehicle air conditioner 10 such as temperature setting of the vehicle air conditioner 10 and selection of the outlet is connected. 30 and the detected value of the solar radiation sensor 28 are input to the air conditioner ECU 11, and air conditioning control of the vehicle interior is performed according to the setting of the operation unit 15 based on the detection result of each sensor.

  Furthermore, an engine ECU 12 is connected to the air conditioner ECU 11 via an eco-run ECU (Electronic Control Unit) 17. An engine start request, a stop request, or the like can be made from the air conditioner ECU 11 to the engine ECU 12 via the eco-run ECU 17. It is possible. Although the present embodiment is described as a configuration including the eco-run ECU 17, the eco-run ECU 17 may be omitted and the engine ECU may be directly connected to the air conditioner ECU 11.

  The eco-run ECU 17 performs control for suppressing unnecessary exhaust gas and fuel consumption by making an engine stop request, an engine start request, and the like to the engine ECU 12 in accordance with the running state of the vehicle. For example, when the vehicle stops and the side brake or the like is operated, an engine stop request is sent to the engine ECU 12 to stop idling, and when the side brake is released thereafter, the engine start request is sent to the engine ECU 12. The control such as automatically starting the engine is performed. Further, in the present embodiment, a request such as an engine stop request or a start request according to a request from the air conditioner ECU 11 is output to the engine ECU 12.

  As an example of various types of control performed by the air conditioner ECU 11, for example, when the ignition switch is turned on, the target blowing temperature is calculated based on the detection result of each sensor and the setting content of the operation unit 15 to be the target blowing temperature. Perform air conditioning control. In addition, when the air conditioner ECU 11 performs air conditioning control, on / off control of the compressor 14, drive control of the air mix damper motor 36, switching control of the air outlet 44, and air intake 40 according to the target outlet temperature and the like. , 42 control (mode switching control in the inside air circulation mode and outside air introduction mode) and the like are also performed. The switching control of the air intake ports 40 and 42 may be performed manually by the occupant operating the operation unit 15.

  By the way, in this embodiment, when the compressor 14 is turned on and the vehicle interior is air-conditioned, when the engine stop request is made by the eco-run ECU 17 and the engine is stopped (hereinafter referred to as “eco-run”), the compressor 14. As a result, the compression and circulation of the refrigerant stops, and the temperature of the evaporator 20 rises. As a result, the temperature of the evaporator 20 rises during cooling, which may impair comfort, and the dehumidifying performance of the evaporator 20 may be impaired, and odor may be generated. Moreover, the dew point temperature of the passenger compartment air exceeds the dew point temperature of the glass due to the increased temperature blown out from the air blowing port 44, and the glass may be clouded.

  Therefore, in the present embodiment, the maximum time (engine stop time) at which no problem occurs under various environmental conditions is found, and the maximum engine stop time is set in advance under the environmental conditions. By doing so, the engine stop time is extended and fuel efficiency is improved.

  Further, in this embodiment, the greater the amount of solar radiation, the higher the glass temperature and the same humidity in the passenger compartment as compared to when the amount of solar radiation is small. The larger the engine stop time, the longer the engine stop time.

  In the present embodiment, a function or map of the engine stop time viewed from the viewpoint of preventing glass fogging is set in advance. As shown in FIG. 2A, for example, the function or map of the engine stop time for preventing glass fogging is set so that the engine stop time becomes longer as the outside air temperature increases, and the engine stop time increases as the amount of solar radiation increases. Is stored in advance in the air conditioner ECU 11.

  Further, a function or map of the engine stop time viewed from the viewpoint of odor prevention is determined in advance. As shown in FIG. 2B, for example, the function or map of the odor prevention engine stop time is a substantially constant engine stop time until the outside air temperature reaches a predetermined temperature, and the engine temperature increases as the outside air temperature becomes higher than the predetermined temperature. The stop time becomes longer, and what is set to a substantially constant engine stop time above a predetermined temperature is stored in the air conditioner ECU 11 in advance.

  In addition, a function or map of the engine stop time viewed from the viewpoint of comfort is determined in advance. For example, as shown in FIG. 3A, the comfort engine stop time function or map is stored in advance in the air conditioner ECU 11 so that the engine stop time becomes shorter as the outside air temperature becomes higher.

  As shown in FIG. 3B, a function or map of the engine stop time for comfort may be applied so that the engine stop time becomes longer as the target blowing temperature becomes higher. The target blowing temperature Tao can be calculated using the following equation.

Tao = k1, Tset-k2, Ta-k3, Tr-k4, ST + C
Here, k1, k2, k3, and k4 each represent a constant, Tset represents a set temperature, Tr represents the cabin temperature, Ta represents the outside temperature, and ST represents the amount of solar radiation. Moreover, since the target blowing temperature Tao represents the cooling load, as shown in FIG. 3B, the cooling load increases as the target blowing temperature Tao decreases, and the engine stop time for comfort is shown in FIG. As shown in (), the engine stop time becomes longer as the target blowing temperature Tao is higher.

  That is, since the engine stop time is set in advance by each function or map described above, the air conditioner ECU 11 determines that the glass fogging by the following formulas from the detection result of the outside air temperature sensor 32 when the engine is stopped by the eco-run ECU 17. Engine stop time, odor prevention engine stop time, and comfort engine stop time are calculated.

TIME = f1 (Ta, ST)
TIME = f2 (Ta)
TIME = f3 (Ta)
Here, f1 is a function or map of the cloudy engine stop time (FIG. 2A), Ta is the outside air temperature, ST is the amount of solar radiation, f2 is a function or map of the engine stop time for preventing odor (FIG. 2B )), F3 represents a function or map of comfort engine stop time (FIG. 3A).

  Then, the shortest engine stop time is selected from the calculated engine stop times, and an engine start request is made.

  Next, a process performed by the air conditioner ECU 11 of the vehicle air conditioner 10 according to the embodiment of the present invention configured as described above will be described. FIG. 4 is a flowchart showing an example of a flow of processing related to an eco-run performed by the air conditioner ECU 11 of the vehicle air conditioner 10 according to the embodiment of the present invention.

  First, in step 100, detection results of various sensors such as the outside air temperature sensor 32, the inside air temperature sensor 30, and the solar radiation sensor 28 are acquired by the air conditioner ECU 11, and the process proceeds to step 102.

  In step 102, the target blowing temperature Tao is calculated by the air conditioner ECU 11 from the detection results of the various sensors acquired in step 100, and the routine proceeds to step 104.

  In step 104, it is determined by the air conditioner ECU 11 whether or not the eco-run control is performed. The determination is made by determining whether the eco-run is instructed by a switch or the like connected to the eco-run ECU 17, by the air conditioner ECU 11 communicating with the eco-run ECU 17. If the determination is affirmative, the process proceeds to step 106. When the result is negative, the process is returned to execute another process or restart the process from step 100.

  In step 106, it is determined by the air conditioner ECU 11 whether or not the vehicle has stopped. In this determination, for example, the air conditioner ECU 11 determines whether or not the eco-run ECU 17 has received a signal indicating a stop from the engine ECU 12 by communicating with the eco-run ECU 17, and if the determination is affirmed, the process proceeds to step 108. If the result is negative, the process is returned to execute another process or restart the process from step 100.

  In step 108, the engine fogging time (f1) for glass fogging is calculated by the air conditioner ECU 11 from the above formula, and the routine proceeds to step 110. That is, the engine stop time corresponding to the detection result of the outside air temperature sensor 32 is calculated from the function or map representing FIG.

  In step 110, the odor prevention engine stop time (f2) is calculated by the air conditioner ECU 11 from the above formula, and the routine proceeds to step 112. That is, the engine stop time corresponding to the detection result of the outside air temperature sensor 32 is calculated from the function or map representing FIG.

  In step 112, the comfort engine stop time (f3) is calculated by the air conditioner ECU 11 from the above formula, and the routine proceeds to step 114. That is, the engine stop time corresponding to the detection result of the outside air temperature sensor 32 is calculated from the function or map representing FIG. When the function or map representing FIG. 3B is used, the engine stop time corresponding to the target outlet temperature Tao calculated in step 102 is calculated.

  Subsequently, at step 114, the minimum value among the calculated engine stop times is selected by the air conditioner ECU 11, and the routine proceeds to step 116.

  In step 116, an engine stop request is output from the air conditioner ECU 11 to the eco-run ECU 17, and the routine proceeds to step 118.

  In step 118, it is determined by the air conditioner ECU 11 whether the timer is operating. This determination is made by determining whether or not the timer for measuring the time since the eco-run ECU 17 has controlled the engine ECU 12 to stop the engine is operating. If the determination is negative, step 120 is performed. If the result is affirmative, the process proceeds to step 122. Note that the timer is turned on when the vehicle is powered on, and at this time, the timer is reset. This is a so-called power-on reset. The timer is reset when the engine is started by the eco-run ECU 17.

  In step 120, the eco-run ECU 17 controls the engine ECU 12 to start a timer for measuring the time since the engine was stopped, and the process is returned to execute other processes or from step 100. Resume processing.

  On the other hand, in step 122, the timer time from when the engine is stopped is read, and the routine proceeds to step 124.

  In step 124, the air conditioner ECU 11 determines whether or not the selected engine stop time has elapsed since the engine was stopped. That is, when the eco-run ECU 17 controls the engine ECU 12 to stop the engine, the air conditioner ECU 11 determines whether or not the time after the engine has stopped is the engine stop time selected in step 114, and the determination is affirmative. Shifts to step 126, and if the result is negative, returns the process and executes another process or resumes the process from step 100.

  In step 126, an engine start request is output from the air conditioner ECU 11 to the eco-run ECU 17 under the control of the air conditioner ECU 11, and the process proceeds to step 128. Accordingly, the eco-run ECU 17 makes an engine start request to the engine ECU 12 to start the engine and start the compressor 14.

  In step 128, the timer is reset, the process returns, and another process is executed or the process from step 100 is resumed.

  As described above, in the vehicle air conditioner 10 according to the present embodiment, the minimum engine stop time is selected by calculating for each of the glass stop engine stop time, the smell stop engine stop time, and the comfort engine stop time. By doing so, glass fogging and odor can be prevented and comfort can be ensured.

  From the viewpoint of glass fogging, the engine stop time is set longer as the amount of solar radiation increases, so that both glass fog prevention and power saving can be achieved even in cooling.

It is a block diagram which shows schematic structure of the vehicle air conditioner concerning embodiment of this invention. (A) is a figure which shows an example of the engine stop time of glass fogging, (B) is a figure which shows an example of the engine stop time of odor prevention. (A) is a figure which shows an example of the engine stop time of comfort, (B) is a figure which shows the other example of the engine stop time of comfort. It is a flowchart which shows an example of the flow of the process regarding the eco-run performed by air-conditioner ECU of the vehicle air conditioner concerning embodiment of this invention.

Explanation of symbols

10 Vehicle Air Conditioner 11 Air Conditioner ECU
12 Engine ECU
14 Compressor 16 Condenser 17 Eco-run ECU
18 Expansion valve 20 Evaporator 28 Solar radiation sensor 30 Inside air temperature sensor 32 Outside air temperature sensor

Claims (3)

An acquisition means for acquiring a detection result of the solar radiation amount detecting means for detecting the solar radiation amount;
The longer the amount of solar radiation, the longer the engine stop time from when the vehicle is air-conditioned by the air-conditioning means equipped with a compressor that operates with the engine as a drive source to compress the refrigerant until the glass becomes cloudy. Storage means for storing a glass fog prevention function or map preset to
Calculation means for calculating the engine stop time based on the amount of solar radiation acquired by the acquisition means and the function or map stored in the storage means;
When the vehicle interior is air-conditioned by the air-conditioning means, the engine is stopped by an engine control means for controlling start and stop of the engine according to the driving state of the vehicle, and the engine stop time calculated by the calculation means is Control means for controlling the engine control means to start the engine when elapsed;
A vehicle air-conditioning control device. An acquisition means for acquiring the detection result of the solar radiation amount detecting means for detecting the solar radiation amount, and the outside air temperature detecting means for detecting the outside air temperature;
The longer the amount of solar radiation, the longer the engine stop time from when the vehicle is air-conditioned by the air-conditioning means that operates with the engine as a drive source and compresses the refrigerant until the glass is fogged. A function or map relating to glass fog prevention set in advance according to the outside air temperature, a function or map relating to odor prevention preset in accordance with the outside air temperature, from the engine stop to the time when odor is generated, and Storage means for storing a function or a map relating to comfort set in advance according to the outside air temperature from the engine stop until the comfort is impaired;
First calculation means for calculating the engine stop time for preventing glass fogging based on the solar radiation amount and the outside air temperature acquired by the acquisition means, and the function or map relating to the glass fog prevention stored in the storage means; ,
Second calculating means for calculating the engine stop time for preventing odor based on the outside air temperature acquired by the acquiring means and the function or map relating to the odor prevention stored in the storage means;
Third calculating means for calculating the engine stop time for maintaining comfort based on the outside air temperature acquired by the acquiring means and the function or map relating to the comfort stored in the storage means;
Selecting means for selecting the engine stop time that is the minimum among the calculation results of the first to third calculating means;
When the vehicle interior is air-conditioned by the air-conditioning means, the engine is stopped by the engine control means for controlling start and stop of the engine according to the driving state of the vehicle, and the engine stop time selected by the selection means is Control means for controlling the engine control means to start the engine when elapsed;
A vehicle air-conditioning control device. A calculation means for calculating a target blowing temperature of the air conditioning means;
In place of the function or map relating to comfort that is preset according to the outside air temperature, the storage means is preset according to the target outlet temperature until the engine is stopped and the comfort is lost. Remember functions or maps about comfort,
The third calculation means calculates the engine stop time for maintaining comfort based on a target blowing temperature calculated by the calculation means and a function or map related to the comfort stored in the storage means. Item 3. A vehicle air conditioning control device according to Item 2.

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