In-vehicle device control device

Abstract

To enable an occupant to take a comfortable nap in the case of taking the nap by tilting a seat in a cabin where vehicle driving is performed, and to secure safety when restarting driving immediately after the nap.SOLUTION: An on-vehicle equipment controller controls on-vehicle equipment including an air conditioner. The on-vehicle equipment controller determines that an occupant is going to take a nap, by detecting a tilted state of a seat when a vehicle has stopped. In accordance with the determination, operation of the air conditioner is switched to nap-corresponding operation for limiting dehumidification operation. Subsequent to the determination, termination of the nap is determined, and the air conditioner is switched to awakening air-conditioning operation for the occupant having taken the nap.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an in-vehicle device control device that controls in-vehicle devices including a vehicle air conditioner.

Background Art

[0002] Conventionally, when an air conditioning instruction switch of a vehicle air conditioner is operated for a person taking a nap in a nap room in a truck vehicle, the temperature of the nap room fluctuates according to a temperature pattern for napping stored in a memory as a temperature fluctuation pattern that allows for comfortable sleep, and a vehicle air conditioner that adjusts the temperature and air volume of conditioned air is known (see Patent Document 1 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a vehicle not equipped with a nap room, passengers such as drivers will take a nap in the passenger compartment where they drive the vehicle with the seat reclined. At this time, since it is not possible to take a proper nap as in a nap room, even if it is possible to adjust the air conditioning suitable for napping as in the prior art, such adjustment may be forgotten and the person may take a nap in the normal air conditioning operation state, and the air from the air conditioning may directly hit the person, etc., resulting in an inability to take a comfortable nap.

[0005] Also, during a nap in the passenger compartment, the humidity in the passenger compartment may increase due to breathing. However, if one takes a nap while the air conditioner is operating, the air conditioner will detect the increase in humidity in the passenger compartment and perform a dehumidification operation, and conversely, the passenger compartment may become dry during the nap, which may affect the physical condition of the napper.

[0006] Furthermore, when taking a nap with the driver's seat reclined, if driving is resumed immediately after waking up, it becomes difficult to ensure safety as driving will be done with insufficient arousal. Also, when taking a nap with the air conditioner turned off, the humidity inside the vehicle cabin increases immediately after the nap, causing the glass to fog up, which may also lead to a situation where safety is compromised during driving immediately after the nap.

[0007] An object of the present invention is to address such problems. That is, in a vehicle cabin where vehicle driving is performed, when taking a nap with the seat reclined, to enable a comfortable nap, and also to ensure safety when resuming driving immediately after the nap, are the problems of the present invention.

Means for Solving the Problems

[0008] To solve such problems, the present invention comprises the following configuration. An in-vehicle device control device that controls in-vehicle devices including an air conditioner, which detects the reclined state of the seat when the vehicle is stopped and determines that the occupant is taking a nap, and based on the determination, switches the operation of the air conditioner to a nap response operation that restricts dehumidification operation, and after the determination, determines the end of the nap and switches the air conditioner to an awakening air conditioner operation for the napping occupant The end of the standby is determined based on the prediction of the standby end time. The vehicle is an electric vehicle, and the prediction of the standby end time is performed based on the start of EV charging or the EV charging state. An in-vehicle device control device characterized by the above.

Effects of the Invention

[0009] When taking a nap with the seat reclined in a vehicle cabin where vehicle driving is performed, a comfortable nap can be taken. Also, safety can be ensured when resuming driving immediately after the nap.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the in-vehicle device control apparatus 1 according to the embodiment of the present invention includes a control device (ECU: Electronic Control Unit) 1A. The control device 1A includes a single or a plurality of processors and a memory in which a program executed by the processor is stored. The above-described program causes the in-vehicle device control apparatus 1 according to the embodiment of the present invention to perform control so as to enable comfortable dozing when the seat is reclined and dozing is taken in the passenger compartment where vehicle driving is performed, or to ensure safety when restarting driving immediately after dozing.

[0012] Further, the control device 1A is connected to an in-vehicle network (for example, CAN: Controller Area Network) L installed in the vehicle. The control device 1A is connected to various in-vehicle devices and input / output devices of control devices (ECUs) that control them via the in-vehicle network L. Note that the control device 1A may be a unique one that constitutes the in-vehicle device control apparatus 1 according to the embodiment of the present invention, or may be an ECU that controls one of various in-vehicle devices (for example, an air conditioner).

[0013] On the premise that this control device 1A is connected to the input / output devices of various in-vehicle devices via the in-vehicle network L, when the vehicle stops, it detects the recline of the seat and determines that the occupant is taking a nap. Based on this determination, it controls the operation of the air conditioner to switch to a nap mode operation that restricts the dehumidification operation.

[0014] More specifically, for example, the control device 1A receives a vehicle stop signal from a shift operation device 2 or the like, and a seat recline state detection signal from a seat adjustment device 3. When the in-vehicle device control device 1 is mounted on an electric vehicle, the control device 1A receives an EV charging start signal or an EV charge state (SOC: State Of Charge) signal from an in-vehicle charger 4 or the like. Then, it performs arithmetic processing on these inputs and outputs a command for controlling the air conditioner 5 or the seat adjustment device 3.

[0015] In FIG. 2, a control example of the control device 1A will be described. First, the control device 1A waits for the input of a vehicle stop signal and determines whether the vehicle has stopped (step S1). On the premise that the vehicle has stopped, based on the input of the seat recline state detection signal, it determines whether the occupant is taking a nap (step S2). The determination at this time is made based on preset conditions, for example, the seat recline angle has fallen by a set value or more, or the state where the seat recline angle has fallen by a set value or more has continued for a set time, or the seat recline angle has fallen to a state of a set value or more after the EV charging start signal has been input, to determine whether the occupant is taking a nap.

[0016] And when the control device 1A determines that the occupant is taking a nap (step S2: YES), it outputs a command to switch the air conditioner 5 to the nap mode operation (step S3). The nap mode operation here has two aspects. One is to restrict the dehumidification operation. As a result, the air conditioner 5 cannot perform the dehumidification operation even when its control conditions correspond to the dehumidification operation. The other aspect of the nap mode operation is to change the air supply direction. The grill direction is changed to move the wind direction away from the occupant so that the direct air supply does not hit the occupant lying on the reclined seat.

[0017] Thereafter, until it is determined that the nap has ended (step S4), the power saving operation of the air conditioner 5 is continued (step S4: NO). When it is determined that the nap has ended (step S4: YES), a command to switch the air conditioner 5 to the wake-up air conditioning operation for the napping occupant is output.

[0018] The determination of the end of the nap (step S4) can be made, for example, when it is detected by the seat recline state detection signal that the seat state has risen, and it is determined that the nap has ended. Also, the wake-up air conditioning operation of the air conditioner 5 here is set to an air conditioning operation that promotes the awakening of the napping occupant, such as lowering the air conditioning blowing temperature and directing the blowing direction toward the face direction of the occupant.

[0019] According to such a control example, since it is determined whether to take a nap in the reclined state of the seat and a control command is output to the air conditioner 5, the risk that the air conditioner 5 takes a nap while remaining in the normal operation state, disturbing sound sleep with the air conditioning, or harming health due to drying during the nap can be avoided. In particular, according to the power saving operation of the air conditioner 5 described above, by restricting the dehumidification operation, drying of the throat of the napper can be suppressed, and by not directly blowing air on the occupant, the effect of not disturbing sleep can be obtained.

[0020] Also, according to the control example described above, since the determination of whether to take a nap and the determination of the end of the nap are made triggered by the reclined state of the seat, appropriate determination can be made without using an in-vehicle camera or the like, and the system can be simplified. Also, after the determination of the end of the nap, by performing wake-up air conditioning, safety can be ensured even when restarting driving immediately after the end of the nap.

[0021] FIG. 3 shows another control example of the control device 1A. Here, after the control device 1A determines to take a nap, the end time of the nap (nap time) is predicted, and the end of the nap is determined based on this prediction.

[0022] In FIG. 3, steps S10 to S12 are the same as steps S1 to S3 in the above-described example, determining vehicle stop and, on that premise, determining whether the occupant is taking a nap. If it is determined that the occupant is taking a nap, a nap-corresponding operation command is output to the air conditioner 5.

[0023] Thereafter, in step S13, when it is determined in step S11 that the occupant is taking a nap (step S11: YES) is used as a trigger to predict the nap end time (nap time). This prediction is, for example, when making a determination based on the input of the EV charging start signal in the determination of step S11, predicting the completion time of EV charging, and predicting the completion time or a time before the set time of the completion time as the nap end time.

[0024] Also, when an EV charging state signal is input, the nap end time is predicted based on the EV charging state signal. By the user setting a target SOC in advance, the time when the charging state reaches the target SOC or a time before the set time when the target SOC is reached is predicted as the nap end time.

[0025] Alternatively, simply set a general nap time taken during driving in advance, and add that set time to the time at the determination in step S11 to predict the nap end time.

[0026] Thereafter, it is determined whether the elapsed time approaches the predicted nap end time according to the elapsed time (step S14). Until the elapsed time approaches the predicted nap end time, the nap-corresponding operation of the air conditioner 5 is maintained (step S14: NO). When the elapsed time approaches the nap end time (step S14: YES), it is determined whether the operation of the air conditioner 5 has stopped (step S15). If the air conditioning operation has not stopped (step S15: NO), the restriction on the dehumidification operation commanded in step S12 is released (step S16). If the air conditioning operation has stopped (step S15: YES), the air conditioner 5 is turned on and the dehumidification operation is started (step S16A).

[0027] The determination of the end of the nap based on the prediction of the nap end time (step S17) is made by checking whether the elapsed time has reached the predicted nap end time. If it has reached (step S17: YES), a command is output to the seat adjustment device 3 to automatically raise the seat (step S18). After that, the same awakening air-conditioning operation as in step S5 described above is performed (step S19).

[0028] According to such a control example, in addition to the control example described above, by predicting the nap end time, it is possible to permit the dehumidification operation of the air-conditioning device 5 prior to the end of the nap (actively execute the dehumidification operation if the air-conditioning operation has stopped), and it is possible to clear the window fogging that occurred during the nap prior to the end of the nap. As a result, together with the awakening air-conditioning operation to be executed thereafter, the safety when restarting the vehicle operation immediately after the end of the nap can be ensured.

[0029] Hereinafter, an embodiment in the case where the vehicle equipped with the in-vehicle device control device 1 is an electric vehicle (EV: Electric Vehicle) will be described. FIG. 4 is a configuration example (omitting the in-vehicle network) of the in-vehicle device control device 1 mounted on the electric vehicle, and FIG. 5 shows an overview of the interior of the electric vehicle 100.

[0030] The electric vehicle 100 includes at least an air-conditioning device 5 that controls the air-conditioning in the vehicle interior, a driving force output device 20 that outputs a driving force to the driving wheels, a seat adjustment device 3 that adjusts the reclined state of the seat of the occupant including the driver's seat, and a control device 1A in the in-vehicle device control device 1.

[0031] The air-conditioning device 5 performs heating and cooling operations, dehumidification operations, air-blowing operations, etc. for the in-vehicle air-conditioning of the electric vehicle 100. Specifically, the air-conditioning device 5 includes a fan 11 for air-blowing, a grill 12 for changing the air-blowing direction, a refrigerant circuit 13 including an electric compressor, an air-conditioning ECU 10 for controlling these, etc.

[0032] The driving force output device 20 includes an in-vehicle charger (the aforementioned in-vehicle charger 4) 21 that converts an externally supplied AC power supply into a DC power supply, a battery 22 that stores the DC power supply from the in-vehicle charger 21, and an inverter 23 that converts the DC power supply of the battery 22 into an AC power supply.

[0033] Furthermore, the driving force output device 20 includes a traveling motor 24 that drives drive wheels based on the AC power supply from the inverter 23, a battery management unit 25 that detects the charge and discharge state of the battery 22, a motor ECU 26 that controls the inverter 23, and the like.

[0034] When the in-vehicle charger 21 is connected to a charger (charging gun) at a charging station or a household AC power supply, it converts the AC power supply into a DC power supply and charges the battery 22. The battery management unit 25 constantly monitors the EV charging state of the battery 22 and outputs an EV charging state signal to the motor ECU 26 or the control device 1A.

[0035] Based on the charge state of the battery 22 detected by the battery management unit 25, the motor ECU 26 controls the inverter 23 or transmits the EV charging state of the battery 22 to the control device 1A. For example, when the charging of the battery 22 starts, the motor ECU 26 transmits an EV charging start signal to the control device 1A and sequentially transmits an EV charging state signal when the charging of the battery 22 starts.

[0036] The seat adjustment device 3 includes a seating sensor 31 that detects whether there is an occupant on the driver's seat 3S, an angle sensor 32 that detects the reclined state of the driver's seat 3S, a reclining motor 33 that adjusts the reclined state of the seat 3S by rotational driving force, a seat ECU 30 that controls the reclining motor 33 and the like.

[0037] The seat ECU 30 determines whether there is an occupant on the seat 3S by monitoring the output value of the seating sensor 31. Also, the seat ECU 30 monitors the reclining angle of the seat 3S, which is the output value of the angle sensor 32, and determines whether the reclining state of the seat is such that the reclining angle exceeds the set angle.

[0038] The above-mentioned set angle is an angle that is not detected during the operation of the electric vehicle 100. For example, it is an angle obtained by adding a predetermined angle (e.g., 10 to 30 degrees) to the driving reclining angle (e.g., 95 degrees). Also, the seat ECU 30 can automatically control the reclining state of the seat 3S by controlling the reclining motor 33.

[0039] The control device 1A is constantly communicating with the air-conditioning ECU 10, the motor ECU 26, and the seat ECU 30 via an in-vehicle network (not shown). Therefore, the control device 1A can monitor the operating status and control the operation of each of the air-conditioning device 5, the driving force output device 20, and the seat adjustment device 3.

[0040] FIG. 6 and FIG. 7 show the control by the control device 1A of the electric vehicle 100. The control device 1A of the electric vehicle 100 executes the following processing after step S101 when the vehicle stops.

[0041] In step S101, the control device 1A communicates with the motor ECU 26 of the driving force output device 20 to determine whether an EV charging start signal has been input, that is, whether the electric vehicle 100 has started charging. If the control device 1A has not started charging, it waits as it is, and when the EV charging start signal is input and the charging of the electric vehicle 100 starts, it proceeds to step S102.

[0042] In step S102, the control device 1A communicates with the seat ECU 30 of the seat adjustment device 3 to determine whether there is an occupant on the seat 3S. If the control device 1A determines that there is an occupant, it proceeds to step S103, and if there is no occupant, it proceeds to step S106.

[0043] In step S103, the control device 1A communicates with the seat ECU 30 to determine whether the seat 3S is reclined or not.

[0044] When the control device 1A determines that the seat 3S is reclined (step S103: YES), it determines that the occupant is taking a nap and proceeds to step S104. In step S104, the control device 1A commands the air conditioner 5 to perform the aforementioned nap-corresponding operation. When the seat 3S is not reclined, the control device 1A proceeds to step S105.

[0045] When the air conditioner ECU 10 of the air conditioner 5 receives a control command for the nap-corresponding operation from the control device 1A, it restricts the dehumidification operation in order not to excessively dry the interior of the vehicle while the occupant is taking a nap. Specifically, when the air conditioner 5 is in the dehumidification operation, the air conditioner ECU 10 switches to an operation mode different from the dehumidification operation (for example, a preset operation mode such as heating and cooling operation, air blowing operation, etc.) and controls the electric compressor of the fan 11 and the refrigerant circuit 13. Further, the air conditioner ECU 10 controls the grill 12 to blow air in a direction different from the direction in which the occupant is located so that the occupant on the seat 3S is not blown by the wind.

[0046] On the other hand, when the air conditioner 5 is operating in an operation mode different from the dehumidification operation, the air conditioner ECU 10 maintains that operation mode. Note that when the operation stop is preset by the occupant instead of the nap-corresponding operation, the control device 1A may stop the operation. Then, it proceeds to step S107.

[0047] In step S105, the control device 1A maintains the current operation of the air conditioner 5 and proceeds to step S107. In step S106, the control device 1A stops the operation of the air conditioner 5 in order to suppress power consumption and proceeds to step S107.

[0048] In step S107, the control device 1A determines whether it has reached 10 minutes before the charging end time. The charging end time is set as follows, for example.

[0049] When the target SOC at the end of charging is set by the occupant, the control device 1A communicates with the motor ECU 26 and predicts the charging time, which is the time from when the EV charging start signal is input until the end of charging when the target SOC is reached. Then, the control device 1A sets the end charging time based on the predicted charging time.

[0050] Also, when the charging time is preset by the occupant, the control device 1A sets the time when the charging time elapses as the end charging time. Note that when the end charging time is preset by the occupant, the control device 1A directly uses that end charging time.

[0051] When the control device 1A determines that it is 10 minutes before the end charging time, it proceeds to step S108. When it determines that it is not 10 minutes before the end charging time, it returns to step S102. That is, from the start of charging until 10 minutes before the end charging time, the processing from step S102 to step S107 is repeated.

[0052] In step S108, the control device 1A determines whether there is an occupant. If it determines that there is an occupant, it proceeds to step S108. If it determines that there is no occupant, it proceeds to step S112.

[0053] In step S109, the control device 1A determines whether the seat is reclined. If it determines that the seat is reclined, it proceeds to step S110. If it determines that the seat is not reclined, it proceeds to step S111.

[0054] In step S110, the control device 1A controls the air conditioner 5 to perform a dehumidification operation in order to remove the fogging of the front windshield of the electric vehicle 100. When the air conditioner ECU 10 of the air conditioner 5 receives a control command for the dehumidification operation from the control device 1A, it controls the fan 11 and the electric compressor of the refrigerant circuit 13 to perform the dehumidification operation. Then, it proceeds to step S113.

[0055] In step S111, the control device 1A maintains the current operation for the air conditioner 5 and proceeds to step S113. In step S112, the control device 1A stops the operation to suppress power consumption for the air conditioner 5 and proceeds to step S113.

[0056] In step S113, the control device 1A determines whether it has reached 3 minutes before the charging end time. The charging end time is set in the same way as in step S107. If the control device 1A determines that it has reached 3 minutes before the charging end time, it proceeds to step S114 shown in FIG. 7. If it determines that it has not reached 3 minutes before the charging end time, it returns to step S108. That is, from 10 minutes before the charging end time to 3 minutes before the charging end time, the processes from step S108 to step S113 are repeated.

[0057] In step S114, the control device 1A determines whether there is an occupant. If it determines that there is an occupant, it proceeds to step S115. If it determines that there is no occupant, it proceeds to step S118.

[0058] In step S115, the control device 1A determines whether the seat is reclined. If it determines that the seat is reclined, it proceeds to S116. If it determines that the seat is not reclined, it proceeds to step S117.

[0059] In step S116, the control device 1A outputs an operation signal to the seat adjustment device 3 to raise the seat to the driving reclining angle.

[0060] When the seat ECU 30 of the seat adjustment device 3 receives the above operation signal from the control device 1A, it controls the reclining motor 33 so that the seat reaches the driving reclining angle. As a result, the seat 3S is raised until it reaches the driving reclining angle. When the control device 1A detects that the seat 3S has risen beyond the above set angle to the driving reclining angle, it proceeds to step S117.

[0061] In step S117, the control device 1A controls the air conditioner 5 to perform the above-described awakening air-conditioning operation.

[0062] When the air-conditioning ECU 10 receives a control command for the awakening air-conditioning operation from the control device 1A, it blows air in the direction of the occupant of the seat 3S and controls the electric compressor of the fan 11, the grill 12, and the refrigerant circuit 13 so that the occupant's face is hit by the wind. As a result, the occupant can fully wake up from the dozing state before driving, enabling safe driving. Then, the process proceeds to step S119.

[0063] In addition, when the control device 1A detects that the door has been opened during the awakening air-conditioning operation of the air conditioner 5, since it is considered that the occupant has woken up and gone out of the vehicle, the control device 1A controls the air conditioner 5 to stop the awakening air-conditioning operation.

[0064] In step S118, the control device 1A stops the operation of the air conditioner 5 in order to suppress power consumption and proceeds to step S119.

[0065] In step S119, the control device 1A determines whether the charger (charging gun) of the charging station has been removed from the in-vehicle charger 21 and further whether the door has been opened. If the above determination is NO, the control device 1A waits, and if the above determination becomes YES, the process proceeds to step S120. If the above determination is YES, since the charger has been removed from the in-vehicle charger 21 and the door has been opened, it is considered that the occupant is sitting on the seat 3S and the driving preparation is complete.

[0066] In step S120, the control device 1A returns the air-conditioning setting to the operation mode before charging for the air conditioner 5. As a result, the occupant can resume driving the electric vehicle 100 in the vehicle interior environment before charging.

[0067] As described above, when the control device 1A of the electric vehicle 100 detects that the vehicle has stopped and the seat 3S has fallen, it determines that the occupant is dozing and switches the air conditioner 5 to the dozing corresponding operation. As a result, the occupant can take a doze in a comfortable state inside the vehicle.

[0068] Thereafter, when the control device 1A detects that the seat 3S has risen, the control device 1A switches the air conditioner 5 to the wake-up air-conditioning operation, for example, to direct the wind at the face of the occupant. As a result, even immediately after waking up from a doze, the occupant can be fully awakened and safely resume driving.

[0069] In addition, when the electric vehicle 100 is being charged, the control device 1A switches the air conditioner 5 to the wake-up air-conditioning operation at the end of charging or before that. As a result, when the occupant takes a doze during charging, the occupant can be fully awakened in accordance with the end time of charging and safely resume driving.

[0070] Further, before a predetermined time before the end of charging, the control device 1A can remove the moisture inside the vehicle by causing the air conditioner 5 to perform a dehumidifying operation. As a result, at the end of charging, the front windshield of the occupant is not fogged, so the occupant can safely resume driving while ensuring the field of view.

[0071] Here, an example of being mounted on the electric vehicle 100 is shown, but the present invention is not limited to the electric vehicle 100, and it is also applicable to an engine vehicle or a hybrid vehicle provided with an in-vehicle device using a battery.

[0072] In addition, each of the numerical values of "10 minutes before" in step S107 and "3 minutes before" in step S113 is an example, and as long as the order of step S107 and step S113 does not change, other values may be used. Further, in step S113, it is determined whether it is 3 minutes before the end time of charging, but it may be determined whether it is the end time of charging.

[0073] In the above-described embodiment, the seat 3S in the driver's seat is taken as an example for explanation, but the seat in the passenger seat may also be used. Further, for the control device 1A to determine whether there is an occupant on the seat 3S, the output of the seating sensor 31 is used, but instead, the image of a camera that photographs the occupant may be used.

[0074] The power-saving operation of the air conditioner 5 is not limited to the above-described example, and other operation modes may be used as long as the passengers can take a comfortable power nap. Similarly, the wake-up air-conditioning operation of the air conditioner 5 is not limited to the above-described example, and other operation modes may be used as long as the passengers can be fully awakened.

Description of Reference Numerals

[0075] 1: In-vehicle equipment control device, 1A: Control device, 2: Shift operation device, 3: Seat adjustment device, 4, 21: In-vehicle charger, 5: Air conditioner, 10: Air-conditioning ECU, 11: Fan, 12: Grill, 13: Refrigerant circuit, 20: Driving force output device, 22: Battery, 23: Inverter, 24: Traction motor, 25: Battery management unit, 26: Motor ECU, 30: Seat ECU, 31: Occupancy sensor, 32: Angle sensor, 33: Reclining motor, 100: Electric vehicle, L: In-vehicle network

Claims

1. An in-vehicle device control apparatus for controlling an in-vehicle device including an air conditioner, which detects a reclined state of a seat when the vehicle stops and determines that a passenger is taking a nap, and based on the determination, switches the operation of the air conditioner to a nap response operation that restricts a dehumidifying operation, after the determination, determines the end of the nap and switches the air conditioner to an awakening air-conditioning operation for the napping passenger, wherein the end of the nap is determined based on a prediction of the nap end time, the vehicle on which it is mounted is an electric vehicle, and the prediction of the nap end time is performed based on the start of EV charging or the EV charging state, characterized by the in-vehicle device control apparatus.

2. The in-vehicle device control apparatus according to claim 1, characterized in that when it is determined that the predicted nap end time is approaching, the restriction on the dehumidifying operation in the air conditioner is released or the dehumidifying operation is executed.

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