JP5083099B2 - VEHICLE AIR CONDITIONING CONTROL DEVICE, VEHICLE AIR CONDITIONING CONTROL METHOD, AND VEHICLE AIR CONDITIONING CONTROL PROGRAM - Google Patents

Description

  The present invention relates to a vehicle air-conditioning control device, a vehicle air-conditioning control method, and a vehicle air-conditioning control program, and more particularly to a vehicle mounted on a vehicle such as a hybrid vehicle that runs on a motor or an automobile that stops an engine when the vehicle stops. The present invention relates to a vehicle air conditioning control device that controls an air conditioning device, a vehicle air conditioning control method, and a vehicle air conditioning control program.

  There is known a technique for stopping an engine in order to suppress unnecessary exhaust gas emission and fuel consumption due to idling when a vehicle stops.

  In such a technique, when the engine is stopped when the compressor and the blower are turned on to air-condition (cool) the passenger compartment, the compressor is turned off because the compressor is generally rotated by the engine. The air-conditioning refrigerant is no longer compressed and circulated. If the air-conditioning refrigerant is no longer compressed and circulated, damp air on the evaporator surface blows out onto the windshield glass or the like, resulting in cloudiness.

Therefore, in the technique described in Patent Document 1, when the blower fan is in the on state, the necessity for heating, cooling, and dehumidification is determined based on the outside air temperature, the air blowing temperature, and the air suction temperature, and the idle stop is performed. It has been proposed to allow or prohibit Specifically, when the outside air temperature is equal to or higher than the first predetermined value and the air blowing temperature is higher than the second predetermined value, it is determined that dehumidification for cooling and defrosting of the window is necessary and the idle stop is prohibited. Yes.
JP 2001-341515 A

  However, in the technique described in Patent Document 1, a plurality of temperatures such as the outside air temperature, the air blowing temperature, and the air suction temperature are detected, and the necessity of air conditioning is determined by comparing the detection result with a threshold value. The determination of the necessity of air conditioning is complicated.

  The present invention has been made in consideration of the facts, and an object thereof is to control the start and stop of an engine by determining the necessity of air conditioning with a simple configuration.

In order to achieve the above object, an air conditioning control apparatus for a vehicle according to claim 1 includes an acquisition unit that acquires a detection result of a detection unit that detects an outside air temperature, and a compressor that operates using an engine as a drive source to compress refrigerant. Calculating means for calculating an engine stop time from when the vehicle is air-conditioned by the air-conditioning means until the fogging of the glass occurs from the acquisition result of the acquisition means; When the engine is stopped by the engine control means for controlling the start and stop of the engine according to the driving state of the vehicle when the air conditioning is being performed, and the engine stop time calculated by the calculation means has elapsed, the engine is and control means for controlling the engine control means so as to start, wherein the acquisition means, rain detection means for detecting the rain A detection result is further acquired, and the calculation means predetermines the engine stop time according to the outside air temperature during rainy weather and a map for rainy weather that predetermines the engine stop time according to the outside air temperature during rainy weather. A map corresponding to the detection result of the rainy weather detection means is selected from the map for fine weather, and the engine stop time corresponding to the detection result of the detection means is calculated from the selected map .
According to a second aspect of the present invention, there is provided an air conditioning control apparatus comprising: an acquisition unit that acquires a detection result of a detection unit that detects an outside air temperature; and an air compressor that compresses a refrigerant by operating the engine as a drive source. When the vehicle interior is air-conditioned by the calculation means for calculating the engine stop time from the engine stop when the vehicle interior is air-conditioned until the fogging of the glass occurs from the acquisition result of the acquisition means In addition, when 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 has elapsed, the engine is started so that the engine is started. Control means for controlling the engine control means, and the calculation means prohibits the engine from being started and stopped again The prohibition time is further calculated from the detection result of the detection means, and the control means further controls the engine control means to prohibit the engine stop until the prohibition time calculated by the calculation means elapses. It is characterized by doing.
According to the first and second aspects of the invention, the acquisition means acquires the outside air temperature detected by the detection means, and the air conditioning means includes a compressor that operates using the engine as a drive source, and is compressed by the compressor. The vehicle interior is air-conditioned using the refrigerant.
In the calculation means, the engine stop time from when the engine is stopped when the vehicle interior is air-conditioned by the air conditioning means until the fogging of the glass occurs is calculated from the detection result of the detection means.
The engine control means controls the start and stop of the engine according to the driving state of the vehicle. The engine control means performs control such as stopping the engine when the vehicle stops and the side brake or the like is operated, and automatically starting the engine when the side brake is released thereafter.
In the control means, when the vehicle interior is air-conditioned, the engine control means is configured to start the engine when the engine is stopped by the engine control means and the engine stop time calculated by the calculation means has elapsed. Be controlled.
In this way, the engine stop time until the cloudiness of the glass is calculated from the detection result of the outside air temperature, and the engine is controlled to start when the engine stop time has elapsed, so that the glass is fogged. Nothing will happen. That is, since the necessity of air conditioning is determined only by detecting the outside air temperature, it is possible to control the start and stop of the engine by determining the necessity of air conditioning with a simple configuration.
According to the first aspect of the present invention, the acquisition means further acquires the detection result of the rainy weather detection means for detecting rainy weather, and the calculation means determines whether the engine stop time is predetermined according to the outside air temperature during rainy weather. The map corresponding to the detection result of the rain detection means is selected from the map for time and the map for fine weather in which the engine stop time is predetermined according to the outside air temperature in fine weather, and the detection result of the detection means is selected from the selected map By calculating the engine stop time corresponding to, the time until the glass is fogged becomes longer in fine weather than in rainy weather, so the time to stop the engine can be lengthened, and exhaust gas suppression and fuel efficiency improvement are possible It becomes.
On the other hand, in the invention described in claim 2, the calculating means further calculates a prohibition time for prohibiting the engine from being started and stopped again from the detection result of the detecting means, and the control means is calculated by the calculating means. By further controlling the engine control means so as to prohibit the engine stop until the prohibited time elapses, it is possible to prevent the engine from starting and stopping frequently and to stop the engine frequently. The fogging of the glass caused by
According to a third aspect of the present invention, there is provided a vehicle air conditioning control apparatus comprising: an acquisition unit that acquires a detection result of a detection unit that detects an outside air temperature; and an air conditioning unit that includes a compressor that operates using an engine as a drive source to compress refrigerant. Calculating means for calculating the engine stop time from the engine stop when the vehicle interior is air-conditioned until the fogging of the glass occurs based on the acquisition result of the acquisition means and the condition that the predetermined glass is likely to be fogged, 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 And control means for controlling the engine control means so as to start the engine when it has elapsed. That.

According to the third aspect of the present invention, the acquisition means acquires the outside air temperature detected by the detection means, and the air conditioning means includes a compressor that operates using the engine as a drive source, and supplies the refrigerant compressed by the compressor. The passenger compartment is air-conditioned.

In calculation means, the engine stop time until fogging is produced in the glass from the engine stop when the vehicle interior is conditioned by the air conditioning unit, the detection result of the detection means obtained by the obtaining unit and a predetermined glass cloudy Calculated based on easy conditions . For example, the engine stop time can be calculated from the outside air temperature using a predetermined function. The calculating means may calculate the engine stop time corresponding to the detection result of the detection means from the predetermined map according to the outside air temperature as in the invention described in claim 4. Good. As a result, the engine stop time can be easily calculated.

  The engine control means controls the start and stop of the engine according to the driving state of the vehicle. The engine control means performs control such as stopping the engine when the vehicle stops and the side brake or the like is operated, and automatically starting the engine when the side brake is released thereafter.

  In the control means, when the vehicle interior is air-conditioned, the engine control means stops the engine so that the engine control means starts the engine when the engine stop time calculated by the calculation means has elapsed. Be controlled.

  In this way, the engine stop time until the cloudiness of the glass is calculated from the detection result of the outside air temperature, and the engine is controlled to start when the engine stop time has elapsed, so that the glass is fogged. Nothing will happen. That is, since the necessity of air conditioning is determined only by detecting the outside air temperature, it is possible to control the start and stop of the engine by determining the necessity of air conditioning with a simple configuration.

As in the invention described in claim 5 , the acquisition means further acquires the detection result of the rain detection means for detecting rain, and the calculation means predetermines the engine stop time according to the outside air temperature during rain. The map corresponding to the detection result of the rain detection means is selected from the map for rainy weather and the map for sunny weather in which the engine stop time is set in advance according to the outside air temperature in fine weather, and the detection means of the detection means is selected from the selected map. The engine stop time corresponding to the detection result may be calculated. That is, since the time until the glass is fogged is longer in fine weather than in rainy weather, the time for stopping the engine can be lengthened, and exhaust gas suppression and fuel efficiency can be improved.

Further, as in the invention according to claim 6 , the calculation means and the control means further calculate a prohibition time during which the calculation means prohibits the engine from being started and stopped again from the detection result of the detection means, The control unit may further control the engine control unit so as to prohibit the engine from being stopped until the prohibition time calculated by the calculation unit elapses. This can prevent frequent start and stop of the engine and suppress fogging of the glass due to frequent engine stop.

At this time, the calculating means may calculate the prohibited time from the outside air temperature using a predetermined function, or the prohibited time corresponding to the detection result of the detecting means as in the invention according to claim 7. Alternatively, the prohibition time may be calculated from a predetermined prohibition map according to the outside air temperature. Thereby, the prohibition time can be easily calculated.

The vehicle air conditioning control method according to an eighth aspect of the present invention includes an acquisition step of acquiring a detection result of a detection unit that detects an outside air temperature, and an air conditioning unit including a compressor that operates with an engine as a drive source to compress refrigerant. When calculating the engine stop time from the engine stop when the room is air-conditioned until the fogging of the glass occurs from the detection result of the detection means, and when the vehicle interior is air-conditioned by the air-conditioning means, The engine control means for starting the engine when 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 calculated in the calculation step has elapsed. see containing and a control step of controlling the acquisition step, the detection result of the rain detection means for detecting the rain And the calculation step includes a rainy weather map in which the engine stop time is predetermined according to the outside air temperature during rainy weather, and a clear weather map in which the engine stop time is predetermined according to the outside air temperature during fine weather. Then, a map corresponding to the detection result of the rain detection means is selected, and the engine stop time corresponding to the detection result of the detection means is calculated from the selected map .
The vehicle air-conditioning control method according to claim 9 is an air-conditioning unit including an acquisition step of acquiring a detection result of a detection unit that detects an outside air temperature, and a compressor that operates the engine as a drive source to compress refrigerant. A calculation step for calculating an engine stop time from the engine stop when the vehicle interior is air-conditioned until the fogging of the glass occurs from the detection result of the detection means, and when the vehicle interior is air-conditioned by the air-conditioning means In addition, when 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 in the calculation step has elapsed, the engine is started so that the engine is started. A control step for controlling the control means, wherein the calculation step is stopped again when the engine is started. The engine control unit is further configured to calculate a prohibition time for prohibiting the detection from the detection result of the detection unit, and the control step prohibits the engine from being stopped until the prohibition time calculated in the calculation step elapses. Further control is a feature.
According to the eighth and ninth aspects of the present invention, in the acquiring step, the outside air temperature detected by the detecting means is acquired, and the air conditioning means includes a compressor that operates using the engine as a drive source, and is compressed by the compressor. The vehicle interior is air-conditioned using the refrigerant.
In the calculation step, the engine stop time from when the engine is stopped when the vehicle interior is air-conditioned by the air-conditioning means until the fogging of the glass occurs is calculated from the detection result of the detection means.
The engine control means controls the start and stop of the engine according to the driving state of the vehicle. The engine control means performs control such as stopping the engine when the vehicle stops and the side brake or the like is operated, and automatically starting the engine when the side brake is released thereafter.
Further, in the control step, the engine control unit is controlled to start the engine when the engine is stopped by the engine control unit when the vehicle interior is air-conditioned and the engine stop time calculated in the calculation step has elapsed. To do.
In this way, the engine stop time until the cloudiness of the glass is calculated from the detection result of the outside air temperature, and the engine is controlled to start when the engine stop time has elapsed, so that the glass is fogged. Nothing will happen. That is, since the necessity of air conditioning is determined only by detecting the outside air temperature, it is possible to control the start and stop of the engine by determining the necessity of air conditioning with a simple configuration.
In the invention according to claim 8, the acquisition step further acquires the detection result of the rain detection means for detecting rain, and the calculation step is a rainy weather in which the engine stop time is predetermined according to the outside air temperature during the rain. A map corresponding to the detection result of the rainy weather detection means is selected from the time map and the clear weather map in which the engine stop time is determined in advance according to the outside air temperature in fine weather, and the detection result of the detection means is selected from the selected map. By calculating the corresponding engine stop time, the time until the glass is fogged becomes longer in fine weather than in rainy weather, so the time to stop the engine can be lengthened, and exhaust gas suppression and fuel efficiency can be improved. Become.
On the other hand, in the invention according to claim 9, the calculation step further calculates a prohibition time for prohibiting the engine from being started and stopped again from the detection result of the detection means, and the control step is calculated in the calculation step. By further controlling the engine control means so as to prohibit the engine stop until the prohibit time elapses, it is possible to prevent frequent start and stop of the engine and to frequently stop the engine. The fogging of the glass due to this can be suppressed.
The vehicle air conditioning control method according to claim 10 includes an acquisition step of acquiring a detection result of a detection unit that detects an outside air temperature, and an air conditioning unit including a compressor that operates with the engine as a drive source to compress refrigerant. A calculation step of calculating an engine stop time from the engine stop when the vehicle interior is air-conditioned until the fogging of the glass occurs based on the detection result of the detection means and the condition that the predetermined glass is likely to be fogged, 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 calculated in the calculation step has elapsed. And a control step for controlling the engine control means to start the engine. It is set to.

According to the invention described in claim 10 , in the obtaining step, the outside air temperature detected by the detecting means is obtained, and the air conditioning means comprises a compressor that operates using the engine as a drive source, and the refrigerant compressed by the compressor is obtained. The passenger compartment is air-conditioned.

In the calculating step, the engine stop time from when the vehicle is air-conditioned by the air-conditioning means until the fogging of the glass occurs is the detection result of the detection means acquired by the acquisition means and the predetermined glass is fogged. Calculated based on easy conditions . For example, the engine stop time can be calculated using a predetermined function. Further, calculation step, as in the invention according to claim 11, the engine stop time corresponding to the detection result be calculated from a predetermined map engine stop time according to the outside temperature Good. As a result, the engine stop time can be easily calculated.

  The engine control means controls the start and stop of the engine according to the driving state of the vehicle. The engine control means performs control such as stopping the engine when the vehicle stops and the side brake or the like is operated, and automatically starting the engine when the side brake is released thereafter.

  In the control step, the engine control means controls the engine control means to start the engine when the engine is stopped by the engine control means when the vehicle interior is air-conditioned and the engine stop time calculated in the calculation step has elapsed. To do.

  In this way, the engine stop time until the cloudiness of the glass is calculated from the detection result of the outside air temperature, and the engine is controlled to start when the engine stop time has elapsed, so that the glass is fogged. Nothing will happen. That is, since the necessity of air conditioning is determined only by detecting the outside air temperature, it is possible to control the start and stop of the engine by determining the necessity of air conditioning with a simple configuration.

As in the invention described in claim 12 , the acquisition step further acquires the detection result of the rain detection means for detecting rain, and the calculation step predetermines the engine stop time according to the outside air temperature during rain. The map corresponding to the detection result of the rainy weather detection means is selected from the rainy weather map and the clear weather map in which the engine stop time is predetermined according to the outside air temperature in the fine weather, and the detection means is detected from the selected map. The engine stop time corresponding to the result may be calculated. That is, since the time until the glass is fogged is longer in fine weather than in rainy weather, the time for stopping the engine can be lengthened, and exhaust gas suppression and fuel efficiency can be improved.

Further, the calculation step and the control step further calculate a prohibition time for prohibiting the engine from being started and stopped again from the detection result of the detection means, as in the invention of claim 13 . The control step may further control the engine control means so as to prohibit the stop of the engine until the prohibition time calculated in the calculation step elapses. This can prevent frequent start and stop of the engine and suppress fogging of the glass due to frequent engine stop.

At this time, calculation step may be to calculate the inhibition time from ambient temperature using a predetermined function, as in the invention according to claim 1 4, ban corresponding to the detection result The time may be calculated from a prohibition map in which a prohibition time is determined in advance according to the outside air temperature. Thereby, the prohibition time can be easily calculated.

As in the invention described in claim 15 , a vehicle air-conditioning control program that causes a computer to function as each unit of the vehicle air-conditioning control apparatus described in any one of claims 1 to 7 may be used. The vehicle air conditioning control program may be stored in a storage medium and distributed.

  As described above, according to the present invention, the engine stop time until the cloudiness of the glass occurs from the outside temperature is calculated, and the engine is controlled to start when the engine stop time has elapsed after the engine stop. There is an effect that the start and stop of the engine can be controlled by determining the necessity of air conditioning with a simple configuration.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing a schematic configuration of a vehicle air conditioner according to the first 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 a blower motor 22, a mode switching damper motor 24, an air mix damper motor 36, an outlet motor 13, an outlet switching damper motor 34, a compressor 14, an outside air temperature sensor 32, and an inside air temperature sensor 30. In addition, the solar radiation sensor 28 is connected, and 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. The detection values of the sensor 32, the inside air temperature sensor 30, and the solar radiation sensor 28 are input to the air conditioner ECU 11, and the 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. Yes.

  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, if 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 performs. The compression circulation of the refrigerant stops, and the temperature of the evaporator 20 increases. As a result, the dew point temperature of the air blown out from the air outlet 44 may exceed the dew point temperature of the glass, and the glass may be clouded.

  Therefore, in this embodiment, the air conditioner ECU 11 estimates the glass temperature from the detection result of the outside air temperature sensor 32 and calculates the time during which the glass does not fog even when the engine is stopped (hereinafter also referred to as eco-run possible time). For a longer time than the eco-run possible time, an eco-run prohibition request is made to the eco-run ECU 17 so that the engine does not stop.

  Specifically, the air conditioner ECU 11 has a correlation map (eco-run) that predetermines a timer time (engine-on request threshold) that allows the engine to stop with respect to the outside air temperature, such as the engine-on request threshold shown in FIG. A map) is stored, and a time T1 (engine-on threshold) at which eco-run is possible is set as a timer according to the outside air temperature, and an engine start request is made after the time T1 has elapsed, that is, before clouding occurs.

  The eco-run map is determined in advance by conducting an experiment or the like under conditions in which the glass is likely to be fogged (for example, rainy weather, inside air circulation mode, generally used air volume, five-seater ride, etc.). Note that the area on the left side of FIG. 2A of the engine-on request threshold is the eco-run prohibited area, and the area on the right side is the eco-run permitted area. Further, as shown in FIG. 2A, the engine-on request threshold is gradually increased when the outside air temperature is equal to or higher than a predetermined value t. However, this portion may be curved. As shown in (A), the timer time may be approximated by a straight line having a predetermined time interval (for example, 5 seconds) and fixed linearly. Further, in FIG. 2A, when the outside air temperature is smaller than the predetermined value t, the timer time is set to 0 and set as a margin for preventing the glass from fogging, but along the curve of FIG. An engine-on request threshold may be used.

  In addition, as an example of the conditions that the glass is likely to be fogged when setting each correlation map, rainy weather, inside air circulation mode, commonly used air volume, 5 passengers, etc. are given as examples. However, since the temperature rise of the evaporator 20 is fast, the maximum air volume may be used.

  Further, when the eco-run is continuously performed after the eco-run ECU 17 performs the eco-run, that is, when the engine is frequently stopped, the temperature of the evaporator 20 rises and the glass becomes cloudy. End up.

  Therefore, in this embodiment, the eco-run ECU 11 prohibits continuous eco-runs at predetermined time intervals. Specifically, a correlation map (eco-run prohibition map) that predetermines a time during which eco-run is prohibited with respect to the outside temperature (threshold of continuous eco-run prohibition time) like the threshold of prohibition of continuous eco-run shown in FIG. Is set as a timer for prohibiting continuous eco-run in accordance with the outside air temperature (continuous eco-run prohibition time threshold) and prohibiting continuous eco-run until time T2 elapses.

  The eco-run prohibition map is also determined in advance by conducting an experiment or the like under conditions in which the glass is likely to be fogged (for example, rainy weather, inside air circulation mode, five passengers, etc.). The threshold value of the continuous eco-run prohibition time may be curved as shown by the dotted line in FIG. 2 (B), or approximated by a straight line and fixed linearly as shown by the solid line in FIG. 2 (B). You may make it do.

  Next, processing performed by the air conditioner ECU 11 of the vehicle air conditioner 10 according to the first embodiment of the present invention configured as described above will be described. FIG. 3 is a flowchart illustrating 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 first embodiment of the present invention.

  First, in step 100, it is determined by the air conditioner ECU 11 whether or not the A / C switch is on. In this determination, it is determined from the state of the operation unit 15 whether or not the A / C switch for turning on the compressor 14 is turned on. If the determination is affirmative, the process proceeds to step 102 and is denied. In this case, the processing related to the eco-run is returned (end and return to step 100 or perform other processing).

  In step 102, it is determined by the air conditioner ECU 11 whether the blower fan is on. This determination is made based on the state of the operation unit 15. If the determination is affirmative, the process proceeds to step 104. If the determination is negative, the process returns.

  In step 104, it is determined by the air conditioner ECU 11 whether or not the eco-run is in progress. The determination is made as to whether or not the engine stop request is output to the engine ECU 12 by the eco-run ECU 17 and the engine is stopped. If the determination is affirmative, the routine proceeds to step 106; Control goes to step 114.

  In step 106, the outside air temperature detection result is acquired from the outside air temperature sensor 32, and the process proceeds to step 108.

  In step 108, the eco-run possible time T1 is calculated from the outside air temperature, and the routine proceeds to step 110. That is, the eco-run possible time T1 corresponding to the outside air temperature detected using the eco-run map stored in advance is calculated.

  In step 110, it is determined by the air conditioner ECU 11 whether or not the time T1 has elapsed from the start of the eco-run. If the determination is affirmative, the process proceeds to step 112, and if the determination is negative, the process returns.

  In step 112, an engine-on request is output to the eco-run ECU 17 and the process returns. That is, the glass may be fogged after the eco-run possible time T1 has elapsed, so the engine is started by outputting an engine-on request and refrigerant circulation by the compressor 14 is started.

  On the other hand, at step 114, an eco-run prohibition request is output to the eco-run ECU 17 and the routine proceeds to step 116.

  In step 116, the outside air temperature detection result is acquired from the outside air temperature sensor 32, and the process proceeds to step 118.

  In step 118, the continuous eco-run prohibition time T2 is calculated from the outside air temperature, and the routine proceeds to step 120. That is, the eco-run prohibition time T2 corresponding to the outside air temperature detected using the eco-run prohibition map stored in advance is calculated.

  In step 120, it is determined by the air conditioner ECU 11 whether or not the time T2 has elapsed since the engine was restarted (the engine was stopped by the eco-run and restarted). If the determination is negative, the process returns to step 116. The above process is repeated, and if the determination in step 120 is affirmative, the routine proceeds to step 122.

  In step 122, the eco-run prohibition cancellation is output to the eco-run ECU 17 and the process is returned. That is, since the engine stop by the eco-run ECU 17 is prohibited during the time T2, it is possible to prevent the eco-run from being performed at time intervals when the glass is fogged.

  As described above, in the present embodiment, when the engine is stopped by the eco-run ECU 17, the eco-run possible time T1 is set according to the outside air temperature, and when the time T1 has elapsed, an engine start request is made to start the engine. Therefore, the compressor 14 can be driven before the glass is fogged, and the glass fogging due to the eco-run can be prevented. In other words, since the necessity of air conditioning is determined only by detecting the outside air temperature, it is possible to control the start and stop of the engine by determining the necessity of air conditioning with a simple configuration.

Also, when the engine is started, the continuous eco-run prohibition time is set according to the outside air temperature and the eco-run prohibition is canceled when the time T2 has elapsed, so the engine is frequently started and stopped repeatedly. It is possible to prevent the fogging of the glass due to frequent engine stop.
(Second Embodiment)
Then, the vehicle air conditioner concerning 2nd Embodiment of this invention is demonstrated. FIG. 4 is a block diagram showing a schematic configuration of a vehicle air conditioner according to the second embodiment of the present invention. In addition, the same structure as 1st Embodiment is shown with the same code | symbol, and only a difference is demonstrated.

  In the first embodiment, an engine start request is made using one eco-run map so that the glass is not fogged. However, in the second embodiment, two eco-run maps are provided, and an eco-run map is displayed according to the weather. By switching, the engine start request is made so that the glass is not fogged.

  In the second embodiment, as shown in FIG. 4, rain detection means 58 is provided to judge the weather as compared with the first embodiment.

  As the rain detection means 58, for example, a wiper switch, a raindrop sensor, or the like can be applied. When the wiper operation is instructed, it can be determined that it is rainy, and when raindrops are detected by the raindrop sensor. Since it can be determined that it is raining, it is possible to detect rainy weather. The rain detection means is not limited to these, and rain may be detected by another sensor or the like.

  In the present embodiment, the air conditioner ECU 11 stores two eco-run maps. As the two eco-run maps, a rainy-day eco-run map shown in FIG. 5A and a clear-sky eco-run map shown in FIG. 5B are stored.

  The eco-run map for rainy weather is the same as the eco-run map shown in FIG. 2A described in the first embodiment, and the eco-run map for clear weather is less likely to cause fogging of the glass than when raining. The map is set so that the eco-run prohibited area (shaded area) becomes smaller.

  Then, the process performed by air conditioner ECU11 of the vehicle air conditioner concerning 2nd Embodiment of this invention is demonstrated. FIG. 6 is a flowchart showing an example of a flow of processing relating to an eco-run performed by the air conditioner ECU 11 of the vehicle air conditioner according to the second embodiment of the present invention. Note that the same processes as those in the first embodiment will be described with the same reference numerals.

  First, in step 100, it is determined by the air conditioner ECU 11 whether or not the A / C switch is on. In this determination, it is determined from the state of the operation unit 15 whether or not the A / C switch for turning on the compressor 14 is turned on. If the determination is affirmative, the process proceeds to step 102 and is denied. In this case, the processing related to the eco-run is returned (end and return to step 100 or perform other processing).

  In step 102, it is determined by the air conditioner ECU 11 whether the blower fan is on. This determination is made based on the state of the operation unit 15. If the determination is affirmative, the process proceeds to step 104. If the determination is negative, the process returns.

  In step 104, it is determined by the air conditioner ECU 11 whether or not the eco-run is in progress. The determination is made as to whether or not the engine stop request is output to the engine ECU 12 by the eco-run ECU 17 and the engine is stopped. If the determination is affirmative, the routine proceeds to step 105. Control goes to step 114.

  In step 105, the outside air temperature detection result of the outside air temperature sensor 32 and the rain detection result of the rain detecting means 58 are acquired, and the process proceeds to step 107.

  In step 107, the air conditioner ECU 11 determines whether or not it is raining from the detection result of the rain detection means 58. If the determination is affirmative, the process proceeds to step 108. If the determination is negative, the process proceeds to step 109.

  In step 108, the eco-run possible time T1 is calculated from the outside temperature using the rainy weather map, and the process proceeds to step 110. That is, the eco-run possible time T1 corresponding to the outside air temperature detected from the eco-run map for rainy weather shown in FIG. 5A (the eco-run map of the first embodiment) is calculated.

  In step 109, the eco-run possible time T1 is calculated from the outside air temperature using the clear sky map, and the routine proceeds to step 110. That is, the eco-run possible time T1 corresponding to the outside air temperature detected from the clear sky eco-run map shown in FIG.

  In step 110, it is determined by the air conditioner ECU 11 whether or not the time T1 has elapsed from the start of the eco-run. If the determination is affirmative, the process proceeds to step 112, and if the determination is negative, the process returns.

  In step 112, an engine-on request is output to the eco-run ECU 17 and the process returns. That is, the glass may be fogged after the eco-run possible time T1 has elapsed, so the engine is started by outputting an engine-on request and refrigerant circulation by the compressor 14 is started.

  On the other hand, at step 114, an eco-run prohibition request is output to the eco-run ECU 17 and the routine proceeds to step 116.

  In step 116, the outside air temperature detection result is acquired from the outside air temperature sensor 32, and the process proceeds to step 118.

  In step 118, the continuous eco-run prohibition time T2 is calculated from the outside air temperature, and the routine proceeds to step 120. That is, the eco-run prohibition time T2 corresponding to the outside air temperature detected using the eco-run prohibition map stored in advance is calculated.

  In step 120, it is determined by the air conditioner ECU 11 whether or not the time T2 has elapsed since the engine was restarted (the engine was stopped by the eco-run and restarted). If the determination is negative, the process returns to step 116. The above process is repeated, and if the determination in step 120 is affirmative, the routine proceeds to step 122.

  In step 122, the eco-run prohibition cancellation is output to the eco-run ECU 17 and the process is returned. That is, since the engine stop by the eco-run ECU 17 is prohibited during the time T2, it is possible to prevent the eco-run from being performed at time intervals when the glass is fogged.

  As described above, in this embodiment, in the eco-run map for clear weather, the eco-run prohibited area is set smaller than the eco-run map for rainy weather. In other words, by switching the eco-run map to be used according to the weather, the eco-run possible time can be extended compared to the first embodiment, and exhaust gas suppression and fuel efficiency can be improved compared to the first embodiment. It becomes.

  The processing performed by the air conditioner ECU 11 in each of the above embodiments has been described as processing executed by the air conditioner ECU 11 as hardware, but may be a vehicle air conditioning control program that can be executed by a computer. In this case, the vehicle air conditioning control program may be stored and distributed in various storage media such as a flexible disk, CD-ROM, CD-R, and DVD.

  Further, in each of the above embodiments, the time T1 and the eco-run prohibition time T2 in which the eco-run can be performed are calculated using the correlation map (eco-run map and eco-run prohibition map). However, the present invention is not limited to this. Each time may be calculated from a predetermined function corresponding to each correlation map.

  In each of the above embodiments, the vehicle air conditioner using a mechanical compressor that operates using an engine as a drive source has been described as an example. However, the vehicle air conditioner using an electric compressor may be applied. Good. In the case of an electric compressor, when the electric compressor is stopped for the purpose of saving battery power, etc., control is performed such as making an on / off request for the electric compressor instead of the on / off request for the engine in each of the above embodiments. This makes it possible to achieve both power saving and prevention of glass fogging.

  In each of the above embodiments, the mode switching damper motor 24, the outlet switching damper motor 34, the air mix damper motor 36, and the like are provided, and mode switching, outlet switching, temperature adjustment, etc. are automatically performed. An example has been described, but these may be omitted and a vehicle air conditioner that performs various types of switching manually may be applied. Further, a vehicle air conditioner that manually adjusts the temperature by omitting the solar radiation sensor 28 and the inside air temperature sensor 30 may be applied.

It is a block diagram which shows schematic structure of the vehicle air conditioner concerning 1st Embodiment of this invention. (A) is a figure which shows an example of an eco-run map, (B) is a figure which shows an example of an eco-run prohibition map. 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 1st Embodiment of this invention. It is a block diagram which shows schematic structure of the vehicle air conditioner concerning 2nd Embodiment of this invention. (A) is a figure which shows an example of the eco-run map for rainy weather, (B) is a figure which shows an example of the eco-run map for fine weather. It is a flowchart which shows an example of the flow of the process regarding the eco-run performed by air-conditioner ECU11 of the vehicle air conditioner concerning 2nd Embodiment of this invention.

Explanation of symbols

10 Vehicle Air Conditioner 11 Air Conditioner ECU
12 Engine ECU
14 Compressor 17 Eco-run ECU
32 Outside air temperature sensor 58 Rain detection means

Claims (15)

Obtaining means for obtaining the detection result of the detecting means for detecting the outside air temperature;
Based on the acquisition result of the acquisition means, the engine stop time from when the engine is stopped to when the fogging of the glass occurs when the vehicle interior is air-conditioned by the air-conditioning means that operates with the engine as a drive source and compresses the refrigerant. A calculating means for calculating;
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;
Equipped with a,
The acquisition means further acquires the detection result of the rainy weather detection means for detecting rainy weather, and the calculation means has a map for rainy weather in which the engine stop time is predetermined according to the outside air temperature during rainy weather, The engine corresponding to the detection result of the detection means is selected from the selected map by selecting a map corresponding to the detection result of the rainy weather detection means from the map for fine weather in which the engine stop time is predetermined according to the outside air temperature. A vehicle air-conditioning control device that calculates a stop time . Obtaining means for obtaining the detection result of the detecting means for detecting the outside air temperature;
Based on the acquisition result of the acquisition means, the engine stop time from when the engine is stopped to when the fogging of the glass occurs when the vehicle interior is air-conditioned by the air-conditioning means that operates with the engine as a drive source and compresses the refrigerant. A calculating means for calculating;
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;
With
The calculation means further calculates a prohibition time for prohibiting the engine from being started and stopped again from the detection result of the detection means, and the control means passes the prohibition time calculated by the calculation means. A vehicle air-conditioning control apparatus for further controlling the engine control means so as to prohibit the engine stop until . Obtaining means for obtaining the detection result of the detecting means for detecting the outside air temperature;
The acquisition result of the acquisition means is the engine stop time from when the engine is stopped to when the fogging of the glass occurs when the vehicle interior is air-conditioned by the air-conditioning means that operates with the engine as a drive source and compresses the refrigerant. And a calculating means for calculating based on a condition that the predetermined glass is likely to be fogged,
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. The vehicle air conditioning control device according to claim 3 , wherein the calculation means calculates the engine stop time corresponding to the detection result of the detection means from a map in which the engine stop time is determined in advance according to an outside air temperature . The acquisition means further acquires the detection result of the rainy weather detection means for detecting rainy weather, and the calculation means has a map for rainy weather in which the engine stop time is predetermined according to the outside air temperature during rainy weather, The engine corresponding to the detection result of the detection means is selected from the selected map by selecting a map corresponding to the detection result of the rainy weather detection means from the map for fine weather in which the engine stop time is predetermined according to the outside air temperature. The vehicle air conditioning control device according to claim 3 , wherein the stop time is calculated .   The calculation means further calculates a prohibition time for prohibiting the engine from being started and stopped again from the detection result of the detection means, and the control means passes the prohibition time calculated by the calculation means. The vehicle air-conditioning control apparatus according to any one of claims 1 to 5, further controlling the engine control means so as to prohibit the engine from being stopped.   The vehicle air conditioning control device according to claim 6, wherein the calculation unit calculates the prohibition time corresponding to the detection result of the detection unit from a prohibition map in which the prohibition time is determined in advance according to an outside air temperature. An acquisition step of acquiring a detection result of a detection means for detecting the outside air temperature;
From the detection result of the detection means, the engine stop time from when the engine is stopped to when the fogging 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. A calculating step for calculating;
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 calculated in the calculation step has elapsed. A control step for controlling the engine control means to start the engine,
Including
The acquisition step further acquires a detection result of rainy weather detection means for detecting rainy weather, and the calculation step includes a map for rainy weather in which the engine stop time is predetermined according to the outside air temperature during rainy weather, The map corresponding to the detection result of the rainy weather detection means is selected from the map for clear weather in which the engine stop time is predetermined according to the outside air temperature, and the engine stop corresponding to the detection result of the detection means is selected from the selected map A vehicle air conditioning control method for calculating time . An acquisition step of acquiring a detection result of a detection means for detecting the outside air temperature;
From the detection result of the detection means, the engine stop time from when the engine is stopped to when the fogging 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. A calculating step for calculating;
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 calculated in the calculation step has elapsed. A control step for controlling the engine control means to start the engine,
Including
The calculation step further calculates a prohibition time for prohibiting the engine from being started and stopped again from the detection result of the detection means until the prohibition time calculated in the calculation step elapses. A vehicle air-conditioning control method for further controlling the engine control means so as to prohibit the stop of the engine . An acquisition step of acquiring a detection result of a detection means for detecting the outside air temperature;
The detection result of the detection means indicates the engine stop time from when the engine is stopped to when the fogging 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. And a calculation step for calculating based on a condition that the predetermined glass is likely to be fogged,
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 calculated in the calculation step has elapsed. A control step for controlling the engine control means to start the engine,
A vehicle air-conditioning control method.   The vehicle air conditioning control method according to claim 10, wherein the calculating step calculates an engine stop time corresponding to a detection result of the detection means from a map in which the engine stop time is determined in advance according to an outside air temperature.   The acquisition step further acquires a detection result of rainy weather detection means for detecting rainy weather, and the calculation step includes a map for rainy weather in which the engine stop time is predetermined according to the outside air temperature during rainy weather, The map corresponding to the detection result of the rainy weather detection means is selected from the map for clear weather in which the engine stop time is predetermined according to the outside air temperature, and the engine stop corresponding to the detection result of the detection means is selected from the selected map The vehicle air conditioning control method according to claim 10, wherein the time is calculated.   The calculation step further calculates a prohibition time for prohibiting the engine from being started and stopped again from the detection result of the detection means until the prohibition time calculated in the calculation step elapses. The vehicle air-conditioning control method according to any one of claims 8 to 12, further comprising controlling the engine control means so as to prohibit the stop of the engine.   14. The vehicle air conditioning control method according to claim 13, wherein the calculating step calculates a prohibition time corresponding to a detection result of the detection means from a prohibition map in which the prohibition time is determined in advance according to an outside air temperature.   A vehicle air-conditioning control program for causing a computer to function as each unit of the vehicle air-conditioning control device according to any one of claims 1 to 7.

Images