JP2019214331A - Vehicular air conditioning control device - Google Patents

Abstract

To provide a vehicular air conditioning control device that can secure air conditioning performance (cooling force maintenance) during automatic stop of an engine, and can suppress deterioration in fuel efficiency of the engine.SOLUTION: The vehicular air conditioning control device comprises an information acquiring means for acquiring at least signal information or navigation device information; predicts time elapsing until an engine automatically stops and time during which automatic stoppage of the engine continues on the basis of the signal information from the information acquiring means; calculates an evaporator target temperature at which cooling force can be maintained for a period of time during which the automatic stoppage of the engine continues, and calculates time required for cooling an evaporator down to the evaporator target temperature; and instructs an air conditioning device to cool the evaporator down toward the evaporator target temperature when the time elapsing until the engine automatically stops is not longer than the time required for cooling the evaporator down to the evaporator target temperature.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle air conditioning control device.

  BACKGROUND ART As a vehicle air conditioning control device, a device described in Patent Document 1 is conventionally known. In this vehicle air-conditioning control device, a change in the engine rotation speed is predicted from a vehicle torque model, a compressor stop timing is predicted from the prediction, the compressor capacity is increased from a predetermined time before the compressor stop timing, and the airflow is reduced. The temperature of the evaporator is reduced by reducing the rotation speed of the fan.

JP 2011-189812 A

  However, in the above prior art, since the vehicle stop timing itself is not predicted, the timing to start cooling the evaporator may not be optimal. That is, the vehicle torque model is used to calculate how long the compressor can operate based on the amount of change in vehicle speed, etc.For example, if the previous traffic light turns red, the driver If the vehicle speed changes greatly due to stepping on, etc., the vehicle stop timing will be earlier than the initially predicted timing, and cooling of the evaporator will not be in time, so it is necessary to stop the vehicle before stopping the vehicle. There was a fear that it would not be possible to maintain a great cold power.

  The vehicle air-conditioning control device of the present invention includes an information obtaining unit that obtains at least signal information or navigation device information. Based on the signal information from the information obtaining unit, the time until the automatic engine stop and the continuous engine stop time are determined. Estimating and calculating the evaporator target temperature capable of maintaining the cooling power during the engine automatic stop duration, calculating the time required to cool the evaporator to the evaporator target temperature, and calculating the time until the engine automatic stop. However, when the time required to cool the evaporator to the evaporator target temperature is not longer than the required time, the air conditioner is instructed to cool the evaporator toward the evaporator target temperature.

  Therefore, in the vehicle air-conditioning control device of the present invention, air-conditioning performance (cooling power maintenance) during automatic engine stop can be ensured, and deterioration of fuel efficiency of the engine can be suppressed.

FIG. 1 is a diagram illustrating a configuration of an entire control system as an example to which the present invention is applied. 3 is a flowchart illustrating a flow of a process of the vehicle air-conditioning control device according to the first embodiment. 3 is a time chart illustrating an example of a process performed by the vehicle air-conditioning control device according to the first embodiment. 9 is a flowchart illustrating a flow of a process performed by the vehicle air-conditioning control device according to the second embodiment. 9 is a time chart illustrating an example of a process performed by the vehicle air-conditioning control device according to the second embodiment. 10 is a flowchart illustrating a flow of a process of the vehicle air-conditioning control device according to the third embodiment. 10 is a time chart illustrating an example of a process performed by a vehicle air-conditioning control device according to a third embodiment.

[Example 1]
FIG. 1 is a diagram showing a configuration of an entire control system as an example to which the present invention is applied.

The vehicle to which the present invention is applied has an engine automatic stop function.
There are three types of engine automatic stop functions: idle stop (IS), coast stop (CS), and sailing stop (SS).
IS is a function of stopping the engine while the vehicle is stopped, thereby suppressing unnecessary fuel consumption.
In addition, CS is a function of stopping the engine while the vehicle is running at a vehicle speed of a predetermined vehicle speed (for example, 10 km / h) or less and stopping the vehicle before stopping, thereby suppressing unnecessary fuel consumption.
Further, SS refers to coasting, for example, in which a vehicle is running at a high vehicle speed (for example, 80 km / h) on a highway such as a long gentle downhill, and the driver does not step on the accelerator or the brake. If it is, the function is to stop the engine and reduce unnecessary fuel consumption.

First, the configuration of the entire control system will be described with reference to FIG.
The air-conditioning control device 1 includes signal information from a communication device 2 mounted on the own vehicle that performs mutual communication with a camera 3 mounted on the own vehicle and a roadside device installed on the road, traffic condition information such as traffic congestion, and information on the mounted vehicle. An information acquisition unit 1a is provided for acquiring map information from the navigation device 13, outside temperature information from the outside temperature sensor 14, insolation information from the insolation sensor 15, and air volume information from the blower fan sensor 16.
In addition, the air-conditioning control device 1 learns the temperature rise speed data of the evaporator 11 during the past automatic stop of the engine (IS, CS, SS) during the same travel, the start and end timings of the SS that are aggregated and analyzed, and the learning. Information such as the habit of the driver's driving operation is stored.

  Further, the air-conditioning control device 1 performs mutual communication of an engine automatic stop permission command signal to the engine control device 4 as engine stop control means, or an engine state signal from the engine control device.

The engine control device 4 as engine stop control means controls the engine 5 based on signals such as the vehicle speed V from the vehicle speed sensor 6 and the driver's depression opening θ from the accelerator pedal sensor 7.
The variable displacement compressor 8 is driven by the engine 5 by the engine-side pulley 5a, the compressor-side pulley 8a, and the belt 9, and adjusts the discharge amount according to a command from the air conditioning control device 1.

Next, the configuration of the air conditioner 20 and the operation of the refrigeration cycle will be described.
The refrigerant compressed by the variable displacement compressor 8 is cooled by the condenser 10 and liquefied.
The liquefied refrigerant passes through an expansion valve (not shown), is injected into the evaporator 11, and is vaporized.
In the evaporator 11, the vaporized refrigerant takes the surrounding heat to cool the evaporator 11.
The air blown by the blower fan 12 to the cooled evaporator 11 becomes cool air and is sent into the vehicle interior.
The refrigerant flowing out of the evaporator 11 returns to the variable displacement compressor 8 and is compressed again.
Reference numeral 11a is a temperature sensor that measures the temperature Ta of the evaporator 11.

FIG. 2 is a flowchart illustrating a flow of a process of the vehicle air-conditioning control device according to the first embodiment.
That is, the present invention is applied to a vehicle having an IS function.
This flowchart is repeatedly executed at a predetermined calculation cycle.

In step S1, it is determined whether or not the vehicle speed V of the own vehicle is equal to or higher than the IS permission vehicle speed (V = 0).
When the vehicle speed V of the own vehicle is equal to or higher than the IS permission vehicle speed (V = 0), the process proceeds to step S2. When the vehicle speed V of the own vehicle is not equal to or higher than the IS permission vehicle speed (V = 0), the process proceeds to step S9.
In step S2, the next IS permitted vehicle speed (V = 0), that is, the time tn until the vehicle stops (the time until the engine 5 automatically stops) tn is stored as information from the camera 3, the navigation device 13, the communication device 2, and the like. The air-conditioning control device 1 makes a prediction based on the learned driving operation habit information of the driver and the like.
For example, the information from the roadside machine obtains the signal state of the next traffic light and its duration, etc., and judges that the vehicle stops at the stop line at the intersection of the next traffic light with a red light. The time tn until the vehicle stops (the time until the engine 5 automatically stops) tn is predicted from the current vehicle speed of the own vehicle, traffic condition information such as traffic congestion, and the stored and learned driving operation habit information of the driver.

In step S3, similarly, the air-conditioning control device 1 predicts the vehicle stop time, that is, the IS duration time td, based on information from the camera 3, the navigation device 13, and the communication device 2.
For example, a time tn (time until the automatic stop of the engine 5) tn of the own vehicle and a remaining time of the red light state of the traffic signal at that time are obtained, and the duration td of the IS which is the vehicle stop duration is obtained. Make predictions.
At step S4, the stored temperature rise speed data of the evaporator 11 at the time of the past IS during the same traveling is stored as the outside air temperature from the outside air temperature sensor 14, the insolation from the insolation sensor 15, the blower fan sensor 16 Then, the target temperature Tt (for example, 3 ° C.) of the evaporator 11 that can maintain the cooling power for the duration td of the IS is calculated by correcting the cooling load such as the air volume of the blower fan 12 from the air conditioner.

In step S5, a time tc required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt is calculated.
In step S6, is the time tn until the vehicle stops (the time until the automatic stop of the engine 5) tn longer than the time tc required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt? Determine whether or not.
If the time tn until the vehicle stops (the time until the automatic stop of the engine 5) tn is longer than the time tc required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt, the process proceeds to step S12. If the time tn until the vehicle stops (the time until the engine 5 automatically stops) tn is not longer than the time tc required to cool the evaporator 11 from the current temperature Ta to the target temperature Tt, the process proceeds to step S7.

In step S7, the target temperature of the evaporator 11 is set to Tt.
In step S8, the cooling of the evaporator 11 to the target temperature Tt is started.

In step S9, it is determined whether or not the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is lower than the target temperature Tt of the evaporator 11.
When the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is lower than the target temperature Tt of the evaporator 11, the process proceeds to step S10, where the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is the target temperature of the evaporator 11. If it is not lower than Tt, the process returns to step S9.
In step S10, the air conditioning control device 1 determines IS permission and transmits an IS permission signal to the engine control device 4.
In step S11, after the vehicle stops (V = 0), the engine control device 4 stops the engine 5.
In step S12, the target temperature T0 (for example, 10 ° C.) of the evaporator 11 is set without assuming that the engine 5 is stopped.
If the vehicle stops earlier than the time tn until the vehicle stops (time until the automatic stop of the engine 5) predicted by the driver applying sudden braking or the like, the vehicle stop duration td is predicted again. During the predicted vehicle stop duration td, the target temperature Tt of the evaporator 11 capable of maintaining the cooling power is calculated again, and the automatic stop of the engine 5 is prohibited until the evaporator 11 decreases to the target temperature Tt. ing.

  FIG. 3 is a time chart illustrating an example of a process performed by the vehicle air-conditioning control device according to the first embodiment.

  The horizontal axis represents time, with the top representing the vehicle speed V, the bottom representing the change in the number of revolutions of the engine 5 and the temperature of the evaporator 11.

At time t1, steps S1 to S5 in FIG. 2 are executed, and the next IS permitted vehicle speed (V = 0), that is, the time until the vehicle stops (the time until the engine 5 automatically stops) tn, the IS duration The prediction of td, the target temperature Tt of the evaporator 11, and the time tc required for cooling to the target temperature Tt are calculated.
Further, steps S6 to S12 in FIG. 2 are executed, and the target temperature of the evaporator 11 is set to Tt (for example, 10 ° C.).

  The time t2 is a time before the time tc required to cool to the target temperature Tt at the time t3 after the time tn from the time t1 until the vehicle stops (the time until the engine 5 automatically stops) tn. Therefore, at time t2, steps S7 to S8 in FIG. 2 are executed, the target temperature of the evaporator 11 is set to Tt (for example, 3 ° C.), and cooling of the evaporator 11 to the target temperature Tt is started.

  At the time t3 after the time tn (time until the automatic stop of the engine 5) until the vehicle stops predicted from the time t1, at steps S9 to S11 in FIG. 2, the traffic light is in a red light state, and the intersection is stopped. Since the vehicle has stopped on the line, the engine control device 4 that has received the IS permission signal from the air conditioning control device 1 stops the engine 5 as IS.

At a time t4 after the IS duration time td predicted from the time t3, the traffic light turns to a green light state as predicted. Therefore, the engine control device 4 stops the IS, starts the engine 5, and restarts running by driving the engine.
During the IS duration td from the time t3 to the time t4, the temperature of the evaporator 11 is appropriately maintained, and the air conditioning performance (cooling power maintenance) can be secured.

The air conditioning control device according to the first embodiment has the following effects.
(1) The air-conditioning control device 1 determines the time tn until the vehicle stops (the time until the automatic stop of the engine 5) tn and the IS of the vehicle stop continuation time based on the signal information and the traffic condition information from the information obtaining means 1a. The duration time td is predicted, and the target temperature Tt of the evaporator 11 capable of maintaining the cooling power during the vehicle stop duration time td is calculated based on the evaporator temperature increase speed during the automatic stop of the engine during IS. The time tc required to cool the evaporator to the temperature Tt is calculated, and the time tn until the vehicle stops (time until the automatic stop of the engine 5) tn is longer than the time tc required to cool the evaporator to the evaporator target temperature Tt. When it is not long, the evaporator 20 directs the air conditioner 20 to the target temperature Tt of the evaporator 11 before the engine 5 automatically stops. And to instruct the first cooling start.
Therefore, the duration of IS can be extended without sacrificing the air conditioning performance.
Further, since the engine 5 while the vehicle is stopped is not restarted due to the air conditioning performance, deterioration of fuel efficiency can be suppressed.

(2) The target temperature of the evaporator 11 during the automatic stop of the engine 5 uses the stored temperature increase rate of the evaporator 11 at the past IS during the same traveling.
Therefore, since the target temperature Tt of the evaporator 11 can be set accurately, the fuel consumption loss of the running engine 5 can be kept to a minimum, and the cooling operation can be performed during the IS continuation time td, which is the required vehicle stop continuation time. Power can be maintained without sacrificing air conditioning performance.

(3) The temperature rise speed of the evaporator 11 during the automatic stop of the engine 5 is the stored temperature rise speed of the evaporator 11 at the past IS during the same traveling, which is the outside air temperature, the amount of solar radiation, and the air volume of the blower fan 12. Corrected by the cooling load such as the above, and used.
Therefore, since the target temperature Tt of the evaporator 11 can be set more accurately, the fuel consumption loss of the running engine 5 can be kept to a minimum, and the required vehicle stop duration time IS, which is the required vehicle stop duration time, is td. Cooling power can be maintained without sacrificing air conditioning performance.

(4) For predicting the time until the vehicle stops (the time until the automatic stop of the engine 5) tn, in addition to signal information and traffic condition information such as traffic congestion, the stored and learned driving habit information of the driver is used. I did it.
Therefore, the time tn until the vehicle stops (the time until the automatic stop of the engine 5) tn can be predicted more accurately, so that the fuel consumption loss of the engine 5 during traveling is kept to a minimum, and the required vehicle stop duration is required. The cooling power can be maintained for the duration td of the IS, which does not sacrifice the air conditioning performance.

(5) If the vehicle stops earlier than the predicted time until the vehicle stops (the time until the automatic stop of the engine 5) tn, the vehicle stop continuation time td is predicted again, and the predicted vehicle stop continuation is performed again. During the time td, the target temperature Tt of the evaporator 11 capable of maintaining the cooling power is calculated again, and the automatic stop of the engine 5 is prohibited until the evaporator 11 decreases to the target temperature Tt.
Therefore, since the IS time extended by this is much longer than the time required to cool the evaporator 11, the IS time can be lengthened as a whole, and deterioration of the fuel efficiency of the engine 5 can be suppressed. .

[Example 2]
FIG. 4 is a flowchart illustrating a flow of a process performed by the vehicle air-conditioning control device according to the second embodiment.
That is, the present invention is applied to a vehicle having a CS function.
This flowchart is repeatedly executed at a predetermined calculation cycle.

In step S21, it is determined whether or not the vehicle speed V of the own vehicle is equal to or higher than the CS permission vehicle speed Va (for example, 10 km / h).
When the vehicle speed V of the host vehicle is equal to or higher than the CS permission vehicle speed Va, the process proceeds to step S22. When the vehicle speed V of the host vehicle is not equal to or higher than the CS permission vehicle speed Va, the process proceeds to step S29.
In step S22, the time tn until the next CS-permitted vehicle speed Va (the time until the automatic stop of the engine 5) tn is stored in the information from the camera 3, the navigation device 13, the communication device 2, and the like. The information is predicted by the air conditioning control device 1.
For example, the information from the roadside machine obtains the signal state of the next traffic light and its duration, etc., and judges that the vehicle stops at the stop line at the intersection of the next traffic light with a red light. Predicting the time tn (time until the automatic stop of the engine 5) until the next CS permission vehicle speed Va from the current vehicle speed of the own vehicle, traffic condition information such as traffic congestion, stored and learned driver's driving habit information and the like. I do.

In step S23, similarly, the time from the automatic stop time of the engine 5 to the time at which the vehicle stops at the stop line at the intersection until the vehicle restarts, that is, the CS continuation time td is determined by the camera 3 and the navigation device 13. The air conditioning control device 1 makes predictions based on information from the communication device 2 and the like.
For example, from the predicted time to the next CS-permitted vehicle speed Va (time to automatic stop of the engine 5) tn and the predicted time to the next CS-permitted vehicle speed Va (time to automatic stop of the engine 5) tn, The time ts until the vehicle stops at the stop line and the remaining time of the red light state of the traffic light after the vehicle stops at the intersection stop line are obtained, and the vehicle stop time tr is calculated. From the time ts and the time tr, the CS duration time td is predicted.
In step S24, the stored temperature rise speed data of the evaporator 11 during the past CS during the same traveling is stored as the outside air temperature from the outside air temperature sensor 14, the insolation from the insolation sensor 15, the blower fan sensor 16 Then, the target temperature Tt (for example, 3 ° C.) of the evaporator 11 which can maintain the cooling power for the duration td of the CS is calculated by correcting the cooling load such as the air volume of the blower fan 12 from the air conditioner.

In step S25, a time tc required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt is calculated.
In step S26, the time tn until the next CS-permitted vehicle speed Va (time until the automatic stop of the engine 5) tn is the time required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt. It is determined whether it is longer than tc.
When the time tn until the next CS permission vehicle speed Va (time until the automatic stop of the engine 5) tn is longer than the time tc required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt. Proceeding to step S32, the time tn until the next CS-permitted vehicle speed Va (time until the automatic stop of the engine 5) tn is not longer than the time tc required to cool the evaporator 11 from the current temperature Ta to the target temperature Tt. In some cases, the process proceeds to step S27.

In step S27, the target temperature of the evaporator 11 is set to Tt.
In step S28, cooling of the evaporator 11 to the target temperature Tt is started.

In step S29, it is determined whether the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is lower than the target temperature Tt of the evaporator 11.
When the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is lower than the target temperature Tt of the evaporator 11, the process proceeds to step S30, where the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is the target temperature of the evaporator 11. If it is not lower than Tt, the process returns to step S29.
In step S30, the air conditioning control device 1 determines CS permission and transmits a CS permission signal to the engine control device 4.
In step S31, after the vehicle speed V of the vehicle reaches the CS permission vehicle speed Va, the engine control device 4 stops the engine 5.
In step S32, the target temperature T0 (for example, 10 ° C.) of the evaporator 11 is set without assuming that the engine 5 is stopped.
If the vehicle reaches the permitted vehicle speed Va earlier than the time tn (time until the automatic stop of the engine 5) until the next CS permitted vehicle speed Va predicted by the driver applying a sudden brake, etc. The continuation time td is predicted again, and the target temperature Tt of the evaporator 11 capable of maintaining the cooling power is calculated again for the predicted continuation time td of the CS, and the engine 5 is operated until the evaporator 11 decreases to the target temperature Tt. To prohibit automatic stoppage.

  FIG. 5 is a time chart illustrating an example of a process performed by the vehicle air-conditioning control device according to the second embodiment.

  The horizontal axis represents time, with the top representing the vehicle speed V, the bottom representing the change in the number of revolutions of the engine 5 and the temperature of the evaporator 11.

At time t1, steps S21 to S25 in FIG. 4 are executed, the time tn until the next CS-permitted vehicle speed Va (time until the automatic stop of the engine 5) tn, the continuation time td of the CS, and the target of the evaporator 11 are set. A time tc required for cooling to the temperature Tt and the target temperature Tt is calculated.
Further, steps S26 to S32 in FIG. 4 are executed, and the target temperature of the evaporator 11 is set to Tt (for example, 10 ° C.).

  The time t2 is a time before the time tc required to cool to the target temperature Tt at the time t3 after the time tn (time until the automatic stop of the engine 5) till the CS permission vehicle speed Va predicted from the time t1. Therefore, at time t2, steps S27 to S28 in FIG. 4 are executed, the target temperature of the evaporator 11 is set to Tt (for example, 3 ° C.), and cooling of the evaporator 11 to the target temperature Tt is started.

At time t3 after the time tn from the time t1 to the CS permission vehicle speed Va (time until the automatic stop of the engine 5) tn, steps S29 to S31 in FIG. 4 are executed, and the vehicle speed V of the vehicle becomes the CS permission vehicle speed. Since Va has been reached, the engine control device 4 that has received the CS permission signal from the air conditioning control device 1 stops the engine 5 as CS.
Thereafter, at time t3 ', the vehicle stops at the stop line at the intersection because the signal state of the traffic light is a red light.

At a time t4 after the CS continuation time td predicted from the time t3, the traffic light changes to a green light state as predicted, so the engine control device 4 stops the CS, starts the engine 5, and resumes running by driving the engine.
During the CS continuation time td from the time t3 to the time t4, the temperature of the evaporator 11 is appropriately maintained, and the air conditioning performance (cooling power maintenance) can be secured.

The air conditioning control device according to the second embodiment has the following effects.
(1) The air-conditioning control device 1 determines the time tn (time until the automatic stop of the engine 5) tn and the CS continuation time td based on the signal information and the traffic condition information from the information obtaining means 1a based on the traffic information. For estimating and calculating the target temperature Tt of the evaporator 11 capable of maintaining the cooling power for the duration td of the CS based on the rate of increase in the evaporator temperature during the automatic engine stop, the evaporator is cooled to the evaporator target temperature Tt. The required time tc is calculated, and when the time tn to the CS permission vehicle speed Va (time until the automatic stop of the engine 5) tn is not longer than the time tc required to cool the evaporator to the evaporator target temperature Tt, the air conditioning is performed. Before the automatic stop of the engine 5, the apparatus 20 is instructed to start cooling the evaporator 11 to the target temperature Tt of the evaporator 11. It was way.
Therefore, the duration of CS can be extended without sacrificing the air conditioning performance.
Further, since the engine 5 while the vehicle is stopped is not restarted due to the air conditioning performance, deterioration of fuel efficiency can be suppressed.

(2) As the target temperature of the evaporator 11 during the automatic stop of the engine 5, the stored temperature increase speed of the evaporator 11 during the past CS during the same running is used.
Therefore, since the target temperature Tt of the evaporator 11 can be set accurately, the fuel consumption loss of the running engine 5 can be kept to a minimum, and the cooling power can be maintained for the required CS continuation time td. No sacrifices in performance.

(3) The temperature rise rate of the evaporator 11 during the automatic stop of the engine 5 is the stored temperature rise rate of the evaporator 11 during the past CS during the same travel, which is the outside air temperature, the amount of solar radiation, and the air volume of the blower fan 12. Corrected by the cooling load such as the above, and used.
Therefore, the target temperature Tt of the evaporator 11 can be set more accurately, so that the fuel consumption loss of the running engine 5 can be kept to a minimum, and the cooling power can be maintained for the required CS continuation time td, There is no sacrifice in air conditioning performance.

(4) In order to predict the time tn until the CS-permitted vehicle speed Va (the time until the automatic stop of the engine 5) tn, in addition to traffic information such as signal information and traffic congestion, the stored and learned driving habit information of the driver. Was used.
Therefore, it is possible to more accurately predict the time tn up to the CS permission vehicle speed Va (the time until the automatic stop of the engine 5) tn, so that the fuel consumption loss of the running engine 5 is kept to a minimum, and the required CS During the duration time td, the cooling power can be maintained without sacrificing the air conditioning performance.

(5) If the vehicle reaches the permitted vehicle speed Va earlier than the time tn (time until the automatic stop of the engine 5) until the next CS permitted vehicle speed Va predicted by the driver applying sudden braking, etc. Is again predicted, and the target temperature Tt of the evaporator 11 capable of maintaining the cooling power is calculated again during the predicted CS duration td again until the evaporator 11 decreases to the target temperature Tt. 5 was automatically prohibited.
Therefore, since the CS time extended by this is much longer than the time required to cool the evaporator 11, the CS time can be lengthened as a whole, and deterioration of the fuel efficiency of the engine 5 can be suppressed. .

Example 3
FIG. 6 is a flowchart illustrating the flow of the process of the vehicle air-conditioning control device according to the third embodiment.
That is, the present invention is applied to a vehicle having an SS function.
This flowchart is repeatedly executed at a predetermined calculation cycle.

In step S41, it is determined whether or not the vehicle speed V of the own vehicle is equal to or higher than the SS permission vehicle speed Vb (for example, 80 km / h).
When the vehicle speed V of the host vehicle is equal to or higher than the SS permission vehicle speed Vb, the process proceeds to step S42. When the vehicle speed V of the host vehicle is not equal to or higher than the SS permission vehicle speed Vb, the process proceeds to step S49.
In step S42, the time until the next SS permission vehicle speed Vb (the time until the automatic stop of the engine 5) tn is predicted by the air conditioning control device 1 based on information from the camera 3, the navigation device 13, the communication device 2, and the like. .
For example, at present, a vehicle is running on a highway such as a long gentle downhill road at a high vehicle speed (for example, 80 km / h), and the vehicle is coasting so that the driver does not step on the accelerator or the brake. Judgment, current vehicle speed of the own vehicle, traffic condition information such as traffic congestion, stored and analyzed past timing of automatic stop of engine during high vehicle speed driving of the past own vehicle, driver's driving learned and memorized From the operation habit information and the like, a time tn (time until automatic stop of the engine 5) until the next SS permission vehicle speed Vb, which is the start timing of the automatic engine stop, is predicted.

In step S43, similarly, the vehicle starts traveling on a flat straight road or uphill from the end timing of the automatic stop of the engine while the vehicle is running at a high speed and the automatic stop time of the engine 5, which is stored and analyzed in the past. From the camera 3, the navigation device 13, the communication device 2, etc., and store the collected and analyzed past time td of the SS during the high vehicle speed traveling of the own vehicle at the high vehicle speed. The air-conditioning control device 1 makes predictions based on the end timing, the stored and learned driving operation habit information of the driver, and the like.
For example, the time from the end timing of the automatic stop of the engine during the high-speed running of the past own vehicle which is stored and analyzed and the time at which the engine 5 stops automatically to the time when the vehicle starts running on a flat straight road or uphill. Is obtained, and the duration time td of the SS is predicted.
In step S44, the stored temperature rise speed data of the evaporator 11 during the past SS during the same travel is stored as the outside air temperature from the outside air temperature sensor 14, the insolation from the insolation sensor 15, the blower fan sensor 16 Then, the target temperature Tt (for example, 3 ° C.) of the evaporator 11 which can maintain the cooling power for the duration td of the SS is calculated by correcting the cooling load such as the air volume of the blower fan 12 from the air conditioner.

In step S45, a time tc required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt is calculated.
In step S46, the time tn until the next SS permission vehicle speed Vb (time until the automatic stop of the engine 5) tn is the time required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt. It is determined whether it is longer than tc.
When the time tn until the next SS permission vehicle speed Vb (time until the automatic stop of the engine 5) tn is longer than the time tc required to cool the evaporator 11 from the current temperature Ta detected by the temperature sensor 11a to the target temperature Tt. Proceeding to step S52, the time tn until the next SS permission vehicle speed Vb (time until the automatic stop of the engine 5) tn is not longer than the time tc required to cool the evaporator 11 from the current temperature Ta to the target temperature Tt. Sometimes, the process proceeds to step S47.

In step S47, the target temperature of the evaporator 11 is set to Tt.
In step S48, the cooling of the evaporator 11 to the target temperature Tt is started.

In step S49, it is determined whether the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is lower than the target temperature Tt of the evaporator 11.
When the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is lower than the target temperature Tt of the evaporator 11, the process proceeds to step S50, where the current temperature Ta of the evaporator 11 detected by the temperature sensor 11a is the target temperature of the evaporator 11. If it is not lower than Tt, the process returns to step S49.
In step S50, the air conditioning control device 1 determines SS permission and transmits an SS permission signal to the engine control device 4.
In step S51, after the vehicle speed V of the vehicle reaches the SS permission vehicle speed Vb, the engine control device 4 stops the engine 5.
In step S52, the target temperature T0 (for example, 10 ° C.) of the evaporator 11 is set without assuming that the engine 5 is stopped.
If the vehicle reaches the permitted vehicle speed Vb earlier than the time tn (time until the automatic stop of the engine 5) to the next SS permitted vehicle speed Vb predicted by the driver applying sudden braking, etc. The prediction of the duration td is performed again, and the target temperature Tt of the evaporator 11 capable of maintaining the cooling power is calculated again during the predicted duration td of the SS, and the engine 5 is maintained until the evaporator 11 decreases to the target temperature Tt. To prohibit automatic stoppage.

  FIG. 7 is a time chart illustrating an example of a process performed by the vehicle air-conditioning control device according to the third embodiment.

  The horizontal axis represents time, with the top representing the vehicle speed V, the bottom representing the change in the number of revolutions of the engine 5 and the temperature of the evaporator 11.

At time t1, steps S41 to S45 in FIG. 6 are executed, the time tn until the next SS permitted vehicle speed Vb (time until the automatic stop of the engine 5) tn, the prediction of the SS duration td, and the target of the evaporator 11. A time tc required for cooling to the temperature Tt and the target temperature Tt is calculated.
Further, steps S46 to S52 in FIG. 6 are executed, and the target temperature of the evaporator 11 is set to Tt (for example, 10 ° C.).

  The time t2 is a time before the time tc required to cool down to the target temperature Tt at the time t3 after the time tn (time until the automatic stop of the engine 5) until the SS permission vehicle speed Vb predicted from the time t1. Therefore, at time t2, steps S47 to S48 in FIG. 6 are executed, the target temperature of the evaporator 11 is set to Tt (for example, 3 ° C.), and the cooling of the evaporator 11 to the target temperature Tt is started.

At time t3 after the time tn from the time t1 to the SS permission vehicle speed Vb (time until the automatic stop of the engine 5) tn, steps S49 to S51 in FIG. 6 are executed, and the vehicle speed V of the vehicle becomes the SS permission vehicle speed. Since Vb has been reached, the engine control device 4 that has received the SS permission signal from the air conditioning control device 1 stops the engine 5 as SS.
At this time, by setting the automatic transmission (not shown) to neutral, the connection between the engine 5 and the drive wheels (not shown) is released, so that the load from the engine 5 is not applied to the drive wheels.
For this reason, the rotation speed of the engine 5 becomes '0' rotation, and the coasting becomes substantially constant vehicle speed, so that a smoother running can be performed.

At time t4 after the SS continuation time td predicted from time t3, the vehicle starts traveling on a flat straight road or uphill as predicted, so the engine control device 4 stops the SS and starts the engine 5. The automatic transmission (not shown) restarts running by driving the engine by connecting the engine 5 and the drive wheels (not shown).
During the SS continuation time td from the time t3 to the time t4, the temperature of the evaporator 11 is appropriately maintained, and the air conditioning performance (cooling power maintenance) can be secured.

The air conditioning control device according to the third embodiment has the following effects.
(1) The air-conditioning control device 1 sets the SS based on the start and end timings of the automatic stop of the engine while the own vehicle is running at a high vehicle speed in the past collected and analyzed from the information obtaining means 1a and the traffic condition information. The time tn to the permitted vehicle speed Vb (time until the automatic stop of the engine 5) tn and the duration td of the SS are predicted, and the target temperature Tt of the evaporator 11 capable of maintaining the cooling power during the duration td of the SS is automatically stopped by the engine. The time tc required to cool the evaporator to the evaporator target temperature Tt is calculated based on the rate of rise of the evaporator temperature in the middle, and the time till the SS permission vehicle speed Vb (time until the automatic stop of the engine 5) tn. Is not longer than the time tc required to cool the evaporator up to the evaporator target temperature Tt, Before the automatic stop, and to instruct the start of cooling of the evaporator 11 toward the target temperature Tt of the evaporator 11.
Therefore, the duration of the SS can be extended without sacrificing the air conditioning performance.
Further, since the engine 5 while the vehicle is stopped is not restarted due to the air conditioning performance, deterioration of fuel efficiency can be suppressed.

(2) The target temperature of the evaporator 11 during the automatic stop of the engine 5 uses the stored temperature increase speed of the evaporator 11 during the past SS during the same traveling.
Therefore, since the target temperature Tt of the evaporator 11 can be set accurately, the fuel consumption loss of the running engine 5 can be kept to a minimum, and the cooling power can be maintained for the required CS continuation time td. No sacrifices in performance.

(3) The temperature rise speed of the evaporator 11 during the automatic stop of the engine 5 is the stored temperature rise speed of the evaporator 11 during the past SS at the same running time as the outside air temperature, the amount of solar radiation, and the air volume of the blower fan 12. Corrected by the cooling load such as the above, and used.
Therefore, the target temperature Tt of the evaporator 11 can be set more accurately, so that the fuel consumption loss of the running engine 5 can be kept to a minimum, and the cooling power can be maintained for the necessary SS continuation time td, There is no sacrifice in air conditioning performance.

(4) The prediction of the time tn until the SS permission vehicle speed Vb (the time until the automatic stop of the engine 5) tn is based on the end timing of the automatic stop of the engine during running at a high vehicle speed in the past of the own vehicle which is stored and analyzed. In addition to traffic condition information such as traffic information, traffic information, traffic congestion, and the like, the stored and learned driving habit information of the driver is used.
Therefore, the time to the SS permission vehicle speed Vb (the time until the automatic stop of the engine 5) tn can be predicted more accurately, so that the fuel consumption loss of the engine 5 during traveling is kept to a minimum, and the required SS During the duration time td, the cooling power can be maintained without sacrificing the air conditioning performance.

(5) If the vehicle reaches the permitted vehicle speed Vb earlier than the time tn (the time until the automatic stop of the engine 5) tn to the next SS permitted vehicle speed Vb predicted by the driver applying sudden braking, etc. Is again calculated, and the target temperature Tt of the evaporator 11 capable of maintaining the cooling power is calculated again for the predicted SS time td again until the evaporator 11 decreases to the target temperature Tt. 5 was automatically prohibited.
Therefore, since the SS time extended by this is much longer than the time required to cool the evaporator 11, the SS time can be lengthened as a whole and the deterioration of fuel efficiency of the engine 5 can be suppressed. .

[Other Examples]
As described above, the present invention has been described based on the embodiments. However, the specific configuration of each invention is not limited to the embodiments, and even if there is a design change or the like within a range not departing from the gist of the invention, the present invention is not limited to the embodiments. Included in the invention.
Further, in the embodiment, the description has been given of the variable displacement compressor, but a fixed displacement compressor may be used instead.
Furthermore, the air-conditioning control device stores the start and end timings of the automatic stop (SS) of the engine while the own vehicle is traveling at a high vehicle speed, which has been collected and analyzed, but may be obtained as cloud information.

DESCRIPTION OF SYMBOLS 1 Air-conditioning control apparatus 1a Information acquisition means 2 Communication apparatus 3 Camera 4 Engine control apparatus (engine stop control means)
5 Engine 5a Engine side pulley 6 Vehicle speed sensor 7 Accelerator pedal sensor 8 Variable displacement compressor (compressor)
8a Compressor side pulley 9 Belt 10 Capacitor 11 Evaporator 11a Temperature sensor 12 Blower fan 13 Navigation device 14 Outside temperature sensor 15 Solar radiation sensor 16 Blower fan sensor

Claims (10)

An engine serving as a power source of the vehicle, an engine stop control means for automatically stopping the engine when an automatic stop request is issued during the operation of the engine during running or stopping at low vehicle speed, and a compressor driven by the engine. An air conditioner that circulates a refrigerant in a refrigeration cycle to an evaporator and adjusts an air temperature to be blown into a vehicle cabin by a cooling action of the evaporator;
The vehicle air-conditioning control device includes information obtaining means for obtaining at least signal information,
The vehicle air conditioning control device predicts a time until an automatic engine stop and a continuous engine stop time based on signal information from the information obtaining means, and an evaporator capable of maintaining a cooling power during the automatic engine stop time. Calculate the target temperature, calculate the time required to cool the evaporator to the evaporator target temperature,
When the time until the automatic stop of the engine is not longer than the time required to cool the evaporator to the evaporator target temperature, the air conditioner is instructed to cool the evaporator to the evaporator target temperature. ,
An air conditioning control device for a vehicle, comprising: The vehicle air-conditioning control device according to claim 1,
The evaporator target temperature is calculated based on the stored evaporator temperature increase speed during the past automatic stop of the engine during the same traveling,
An air conditioning control device for a vehicle, comprising: The vehicle air conditioning control device according to claim 2,
The rising speed of the evaporator temperature is corrected by a cooling load such as an outside air temperature, an amount of solar radiation, and a blower fan air volume.
An air conditioning control device for a vehicle, comprising: The vehicle air-conditioning control device according to claim 1,
The prediction of the engine automatic stop timing uses learned driving habit information of the driver,
An air conditioning control device for a vehicle, comprising: The vehicle air-conditioning control device according to claim 1,
If the engine automatic stop timing is earlier than predicted, the engine automatic stop duration is predicted again, and the evaporator target temperature that can maintain the cooling power during the predicted engine automatic stop duration is calculated again. The automatic stop of the engine was prohibited until the evaporator dropped to the evaporator target temperature.
An air conditioning control device for a vehicle, comprising: An engine serving as a power source of the vehicle, engine stop control means for automatically stopping the engine when an automatic stop request is issued during operation of the engine during high-speed running, and a refrigeration cycle including a compressor driven by the engine. An air conditioner for circulating the refrigerant in the evaporator to adjust the temperature of the air blown into the passenger compartment by the cooling action of the evaporator,
The vehicle air-conditioning control device includes information obtaining means for obtaining at least navigation device information,
The vehicle air-conditioning control device predicts the start and end timings of the automatic stop of the engine during high-speed travel of the vehicle based on the navigation device information, and sets the evaporator target temperature that can maintain the cooling power during the automatic stop of the engine. Calculating, and calculating the time required to cool the evaporator to the evaporator target temperature,
When the time until the automatic stop of the engine is not longer than the time required to cool the evaporator to the evaporator target temperature, the air conditioner is instructed to cool the evaporator to the evaporator target temperature. ,
An air conditioning control device for a vehicle, comprising: The air conditioning control device for a vehicle according to claim 6,
The evaporator target temperature is calculated based on the stored evaporator temperature increase speed during the past automatic stop of the engine during the same traveling,
An air conditioning control device for a vehicle, comprising: The vehicle air-conditioning control device according to claim 7,
The rising speed of the evaporator temperature is corrected by a cooling load such as an outside air temperature, an amount of solar radiation, and a blower fan air volume.
An air conditioning control device for a vehicle, comprising: The air conditioning control device for a vehicle according to claim 6,
The prediction of the start and end timings of the engine automatic stop uses learned driving operation habit information of the driver.
An air conditioning control device for a vehicle, comprising: The vehicle air-conditioning control device according to claim 1,
If the start and end timings of the automatic engine stop are earlier than predicted, the start and end timings of the automatic engine stop are predicted again. The evaporator target temperature capable of maintaining the force is calculated again, and the automatic stop of the engine is prohibited until the evaporator decreases to the evaporator target temperature.
An air conditioning control device for a vehicle, comprising:

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