JP2014187842A - Control device for electric drive system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device that controls an electric drive system of an electric vehicle, which can reduce a risk that the vehicle starts unexpectedly without decreasing operability and convenience.SOLUTION: The control device for an electric drive system 10, which allows a vehicle to start only by a travelling motor 11 and is activated by a predetermined activation operation, comprises: driver detecting means 31 that detects whether or not a driver is seated on a driver seat; range selecting means 15 that selects the change gear ranges of a transmission; and control means 20A that when it is determined that the driver is not seated and the selected range is other than a parking range, performs a shut down control to terminate the activation state of the drive system 10.

Description

  The present invention relates to a control device for an electric drive system capable of starting a vehicle using only a traveling motor.

  In recent years, an electric vehicle equipped with a motor (electric motor) as a driving power plant [hybrid electric vehicle] compared to a general vehicle (hereinafter also referred to as an engine vehicle) equipped only with an engine (internal combustion engine) as a driving power plant. Hereinafter, an electric vehicle not including an engine (also referred to as a hybrid vehicle or HEV equipped with an engine) is also referred to as EV, and a hybrid vehicle is referred to as HEV. In the case of an electric vehicle, a situation different from that of an engine vehicle occurs when starting the vehicle or leaving the vehicle after the vehicle stops.

  That is, in the case of an engine vehicle, the starting condition of the vehicle is that the engine is operating, and when the driver leaves the vehicle after the vehicle stops, the engine is usually stopped so that the vehicle does not start. In the case of this engine vehicle, it is possible to recognize whether there is a possibility that the vehicle will start, that is, whether the engine is operating or stopped, from the presence or absence of engine operating noise. Therefore, even if the engine stop operation is forgotten, the driver can easily recognize this, and a person approaching the vehicle can recognize the possibility of starting the vehicle from the operating sound of the engine.

  On the other hand, in the case of an electric vehicle, the starting condition of the vehicle is that an electric drive system such as an EV system composed of a motor and a battery and an HEV system composed of a motor, a battery and an engine are in an activated state. The power switch is operated to activate the electric drive system. When the driver leaves the vehicle after stopping the vehicle, the power switch should normally be stopped by operating the power switch so that the vehicle does not start. Since the fact that the electric drive system is in the activated state is usually displayed by a lamp, the driver can recognize whether or not the vehicle is in the activated state by viewing the display lamp.

  However, the driver may forget to stop the electric drive system and forget to check the display lamp. In the case of an electric vehicle, the motor is also stopped at the same time when the vehicle is stopped, and the vehicle starts at the same time as the motor is started. It is not possible. Therefore, when the driver forgets to stop the electric drive system, the driver does not notice it by hearing, and a person approaching the vehicle cannot recognize the possibility of starting the vehicle from outside. .

  In addition, since an electric vehicle basically does not have an idle state like an engine vehicle, when the vehicle is stopped on a flat road, the vehicle stops even if the transmission is set to the travel range unless the accelerator is operated. The state can be maintained. Even when the vehicle is stopped on a slope, if the side brake is applied, the vehicle can be kept stopped even if the transmission is set to the travel range.

  Furthermore, some electric vehicles have a creep function that simulates a creep phenomenon caused by a torque converter of an engine vehicle and applies a creep torque to the motor even when the accelerator pedal is turned off. In the case of this electric vehicle with a creep function, if the foot brake is released, the vehicle will start very slowly, but if the side brake is applied, the vehicle will remain stopped even if the transmission is set to the travel range. Can do.

  Due to the characteristics of such an electric vehicle, the driver does not operate the transmission to the stop range (parking range) and does not stop the electric drive system (that is, the shutdown operation by turning off the power switch). It can also be assumed that the vehicle leaves the vehicle after the vehicle stops. Under such circumstances, the vehicle may start by simply operating the accelerator, or the vehicle may start by creep torque or the like simply by releasing the side brake.

In this case, for example, if a child remains in the passenger compartment and the child accidentally releases the side brake or steps on the accelerator pedal, the vehicle will start unexpectedly. .
For this reason, in an electric vehicle, the possibility that the vehicle will start unexpectedly, which is assumed when the driver leaves the vehicle without performing the vehicle stop holding operation that is originally required after the vehicle stops, is reduced. There is a need for measures that can be taken.

In addition, a deadman device has been developed that automatically stops a vehicle when an abnormal situation such as loss of consciousness occurs in a driver who is driving a railway vehicle or work vehicle.
Patent Document 1 discloses a travel control device in an electric vehicle such as a battery forklift. In this device, when it is detected by the deadman switch that the operator is not seated on the driving seat, the control signal output processing is performed by the deadman signal (detection signal) at that time, and the acceleration signal by the forward / reverse signal and the pedal depression Regardless of the presence or absence of the vehicle, it is prohibited and the vehicle is stopped.

JP-A-9-215116

  In the case of the deadman device disclosed in Patent Document 1, since the vehicle is stopped when the driver is not seated in the driver's seat, such a technique is applied to electric vehicles (including hybrid electric vehicles). It is possible. In other words, if the driver leaves the vehicle without performing a vehicle stop and hold operation that is originally required, such as turning off the power switch after the vehicle stops, the control signal output process is prohibited and the vehicle is stopped. It is.

  However, since the deadman device is for stopping the vehicle when an abnormal situation occurs in the driving driver, for example, if a person other than the driver sits in the driver's seat after the vehicle stops, Start is possible. In the control of prohibiting the output process of the control signal when the driver leaves the driver's seat as in the technique of Patent Document 1, the prohibition of the output process can be canceled if a person other than the driver sits in the driver's seat. Can be started.

  The deadman device is applied to a work vehicle such as a forklift disclosed in Patent Document 1, but is mainly applied to a railway vehicle. In the case of railway vehicles, the driver's seat is usually isolated, so no one can sit in the driver's seat after the vehicle is stopped, and work vehicles are often used in specific places such as factories. Usually, not everyone can sit in the driver's seat after the vehicle is stopped.

  On the other hand, in the case of an automobile, if the door is not locked, for example, a child can enter the passenger compartment and sit in the driver's seat, and if the child remains in the passenger compartment, the child can also sit in the driver's seat. . In such a case, if the vehicle can be started, it is possible that the vehicle is erroneously started. Therefore, even if the technique of the deadman device is applied to an electric vehicle, the problem of reducing the possibility that the vehicle will start unexpectedly cannot be sufficiently solved.

  In the case of an electric vehicle, there is a process called shutdown that stops the activation state of an electric drive system such as an EV system or HEV system. In order to activate the shut down EV system or HEV system, a predetermined activation operation is required. The predetermined activation operation is, for example, operating the shift range to the P (parking) range by range selection means such as a selector lever or a parking switch, and operating the power switch to the EV system activation mode while depressing the brake pedal. This process is a combination of several operations.

For this reason, the possibility of performing the activation operation by mistake is extremely low, and the possibility of performing the process of further performing the accelerator operation after the activation operation is further decreased.
Therefore, when the driver leaves the vehicle without performing the vehicle stop holding operation required after the vehicle stops, the vehicle may start unexpectedly by shutting down the electric drive system. Can be sufficiently reduced.

However, in the case of an electric vehicle, for example, the following situation can be considered.
When starting up an EV system of an electric vehicle, normally, the shift range is operated to a P (parking) range by a selector lever or a parking switch, and the power switch is operated until the EV system starting mode is set while the brake pedal is depressed. The startup operation is performed. In order to stop the EV system, normally, the shift range is operated to the P range and the power switch is turned off.

  In the case of an automobile, the driver often leaves the driver's seat for a short time when the passenger gets on or off the vehicle, or when taking in or out the luggage. At this time, in many cases, the driver only operates the shift range to the P range and does not perform the operation of turning off the power switch. If the electric drive system is set to stop whenever the driver leaves the driver's seat and the electric drive system is set to stop, the driver who returns to the driver's seat will step on the electric drive system, that is, depress the brake pedal each time. However, it is necessary to turn on the power switch, which is troublesome and the operability of the vehicle is lowered.

  Also, in general, the shutdown not only stops the electric drive system in the activated state, but at the same time, activates the apparatus that can be activated in a device other than the electric drive system mounted on the vehicle that has been activated. This is a process of stopping (making it unstartable). For this reason, if shutdown control is performed while using in-vehicle devices, the convenience of the vehicle may be greatly reduced.

  For example, there is a case where the air conditioner system is operated before entering the vehicle interior or the air conditioner system is operated even when the vehicle is temporarily left to adjust the temperature in the vehicle interior. In some cases, the vehicle lamps may be used while the vehicle is stopped. Further, in a hybrid electric vehicle, when the engine equipped in the HEV system is in a cold state, it may be desired to warm up the engine without the driver.

In these cases, when the driver is absent from the driver's seat and the shutdown control is performed, and the air conditioner system, the lamps, and the engine are stopped, the convenience of the vehicle is greatly reduced.
In addition, if the shift range is set to the P range and the parking gear is locked, an operation for switching the shift range to the travel range is added to the start operation for starting the vehicle, so that the risk of the vehicle suddenly starting is reduced.

The present invention has been devised in view of such a problem. In an electric vehicle, the vehicle is expected even when the driver leaves the stopped vehicle without performing the stop and hold operation of the vehicle that is originally required. An object of the present invention is to provide a control device for an electric drive system which can avoid or reduce the risk of starting without starting.
Further, the present invention is not limited to this object, and other effects of the present invention can be achieved by the functions and effects derived from the respective configurations shown in the embodiments for carrying out the invention which will be described later. Can be positioned as For example, in avoiding or reducing the risk of the vehicle starting unexpectedly, it is possible to add to the object of the present invention not to reduce the operability and convenience of the vehicle as much as possible.

  (1) In order to achieve the above object, the control device for an electric drive system according to the present invention is installed in an electric vehicle and can start the vehicle only with a traveling motor and is activated by a predetermined activation operation. A control device for an electric drive system that is activated from an end state, wherein a driver detection unit that detects whether or not a driver is present in the driver's seat of the vehicle and a selection operation of a shift range of the transmission of the vehicle A range selection unit; and a control unit that performs a shutdown control that terminates an activation state of the drive system in accordance with a selection range by the range selection unit and a detection result of the driver detection unit. When it is detected by the driver detection means that the driver is absent, and the selection range by the range selection means is other than a parking range, And characterized by performing the shutdown control.

Note that the electric vehicle includes a hybrid electric vehicle that can start the vehicle only with a traveling motor.
The predetermined activation operation is, for example, a process of operating the shift range to the P (parking) range by a range selection unit such as a selector lever or a parking switch, and operating the power switch to the EV system activation mode while depressing the brake pedal. is there.

  (2) The shutdown control is configured to end the start-up state of the drive system and end the operable state of the equipment mounted on the vehicle, and the control means is a driver by the driver detection means. Is detected and the selected range is a parking range, the shutdown control is executed if the predetermined condition is not satisfied, and the shutdown control is prohibited if the predetermined condition is satisfied. The predetermined condition preferably includes that the device is operating or scheduled to operate.

  Although the shutdown control is effective in avoiding the risk of unexpected start of the vehicle, it may reduce the operability and convenience of the vehicle. Therefore, when a predetermined condition is set so that the shutdown control is not performed when the operability and convenience of the vehicle are lowered in a situation where the risk of an unexpected start of the vehicle is low, the predetermined condition is satisfied. The shutdown control is not performed.

“Under the situation where the possibility of unexpected start of the vehicle is low” includes, for example, the case where the driver is absent while the parking range is selected. If the parking range is selected, in order to start the vehicle, it is necessary to switch the shift range to the travel range before the accelerator operation, and the possibility that the vehicle will start unexpectedly is low.
Further, “when the operability and convenience of the vehicle is lowered by the shutdown control” means that the shutdown control ends the activation state of the drive system and the operable state of the equipment mounted on the vehicle. In such a case, there is a situation in which the device is operating or the operation schedule is set.

In other words, the driver may get out of the vehicle with the on-board device intentionally activated, and also set the operation schedule of the on-board device by timer reservation etc., and operate the device in the absence of the driver In these cases, if the operation of the device is disabled by the shutdown control, the convenience of the vehicle is lowered.
In addition, when getting off the vehicle while the device is intentionally operated, the driver may immediately return to the vehicle and start the vehicle.When shutdown control is performed, the start operation is performed by a predetermined start operation. Since an operation for starting the drive system is added, the operability of the vehicle is lowered.

As the device, for example, a device that can recognize the operation from outside the vehicle by an operating sound or the like is suitable. In this case, if the device is operating, the operation can be recognized from the outside of the vehicle. Is a temporary stop, and it can be sensed that there is a high possibility that the driver will immediately return to the driver's seat and start the vehicle.
(3) The device preferably includes an electric device including any one of an air conditioner system, an audio system, and a lamp.

(4) It is also preferable that the vehicle is a hybrid electric vehicle equipped with an engine, and the engine is included in the device.
(5) It is also preferable that the predetermined condition includes that the elapsed time from the start of detection of the absence of the driver by the driver detection means is within a predetermined time.
(6) It is also preferable that a remote operation system capable of setting the operation or operation schedule of the device by remote operation is applied to the vehicle.

(7) The vehicle is equipped with an electronic range attainment mechanism that achieves the range selected by the range selection means by means of an electrical signal, and the control means performs the electronic range before performing the shutdown control. It is also preferable to switch the range to the parking range by the achievement mechanism.
(8) It is also preferable that a notification means for notifying that is provided when the shutdown control is performed.

  (1) According to the control device for an electric drive system of the present invention, when it is detected that the selected range of the transmission is other than the parking range and the driver is absent, the drive system is stopped. In order to start the vehicle after that, it is necessary to start the electric drive system from the start end state by a predetermined start operation before the accelerator operation. Therefore, the risk that the vehicle will start unexpectedly is avoided or reduced.

  (2) In the case where the shutdown control is configured to end the start-up state of the drive system and end the operable state of the device mounted on the vehicle, the device is operating or is scheduled to operate If the selected range is the parking range and the driver is absent, the shutdown control is performed if the predetermined condition is not satisfied, and the shutdown control is performed if the predetermined condition is satisfied. By not carrying out, it is possible to avoid or reduce the risk of the vehicle starting unexpectedly without reducing the operability and convenience of the vehicle as much as possible.

If the device can recognize the operation from outside the vehicle, for example, by operating sound, etc., the operation can be recognized from outside the vehicle while the device is operating. There is an advantage that it is possible to sense that there is a high possibility of returning to the vehicle and starting the vehicle.
(3) If the equipment mounted on the vehicle includes an electric device including any one of an air conditioner system, an audio system, and a lamp, the selected range is a parking range, and an electric device such as an air conditioner system, an audio system, a lamp, etc. Shutdown control is not performed when the device is operating or scheduled to operate. Thereby, for example, the vehicle interior temperature can be adjusted by operating the air conditioning system in a situation where the driver is not in the driver's seat.

(4) If the device mounted on the vehicle is an engine mounted on a hybrid electric vehicle, the shutdown control is implemented if the selected range is the parking range and the engine is operating or scheduled to operate. do not do. Thereby, for example, the engine can be operated and warmed up when the driver is not in the driver's seat.
(5) If the predetermined condition includes that the elapsed time from the start of detection that the driver is absent is within a predetermined time, the driver leaves the driver's seat for a short time. When returning to the vehicle immediately after that and starting the vehicle, the shutdown control is not performed. Therefore, it is not necessary to perform a predetermined starting operation for the starting operation, and the operability of the vehicle is improved.

(6) If the remote control system is applied to the vehicle, the convenience of using the vehicle is improved. In this case, too, if the selected range is the parking range and the predetermined condition is satisfied, the shutdown control is not performed. Therefore, convenience by the remote operation system is ensured.
(7) If the vehicle is equipped with an electronic range attaining mechanism that achieves the selected range by an electrical signal, the safety can be achieved by switching the range to the parking range by the electronic range attaining mechanism before performing the shutdown control. Will improve. In addition, in the case of electric vehicles (including hybrid electric vehicles), it is normally set to the parking range as a condition for external charging. External charging can also be performed.

  (8) If a notification to that effect is given when the shutdown control is performed, it is possible to recognize that the driver or the like is shut down, and this does not satisfy the conditions for external charging, and there is a problem with external charging. Can also respond appropriately.

It is a principal part block diagram of the electric vehicle provided with the EV system (electric drive system) concerning 1st Embodiment of this invention. It is a figure explaining the vehicle equipment relevant to the control apparatus of EV system (electric drive system) concerning a 1st embodiment of the present invention, (a) shows a power switch, (b) shows a shift operation device, (C) shows an example of using a general-purpose display device for the present control device. It is a flowchart explaining the shutdown control by the control apparatus of EV system (electric drive system) concerning 1st Embodiment of this invention. It is a principal part block diagram of the hybrid electric vehicle provided with the HEV system (electric drive system) concerning 2nd Embodiment of this invention. It is a flowchart explaining the shutdown control by the control apparatus of the HEV system (electric drive system) concerning 2nd Embodiment of this invention. It is a flowchart explaining the shutdown control by the control apparatus of EV system (electric drive system) concerning 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Here, as the first and third embodiments, a description will be given of an electric drive system control device applied to an electric vehicle (EV) (EV system). As the second embodiment, the electric drive system control device is a hybrid electric vehicle. What is applied to a car (HEV) (HEV system) will be described.

[First Embodiment]
(Vehicle configuration)
FIG. 1 is a configuration diagram of a main part of an electric vehicle (EV) according to the present embodiment. As shown in FIG. 1, an electric vehicle (hereinafter, also simply referred to as a vehicle) 1A is used as a drive power plant, as an electric motor. And a motor generator (motor generator, hereinafter also simply referred to as a motor) 11 having a function as a generator. As the motor 11, an AC three-phase induction machine is used here. A traveling battery 12 that supplies electric power to the motor 11 is mounted.

  The traveling battery 12 is a high voltage battery of about 300 to 400 volts, and the electric power of the traveling battery 12 is supplied to the motor 11 via the inverter 13. In addition, an EV ECU (control means) 20 </ b> A is provided to control the inverter 13. The EV system (electric drive system) 10 is constituted by the motor 11, the traveling battery 12, the inverter 13, the EV ECU 20A, and the like.

  A rotation shaft of the motor 11 is connected to an input portion of a differential (rear wheel differential) 3 via a transmission (here, a speed reducer) 2. Drive shafts 4L, 4R of drive wheels (here, rear wheels) 5L, 5R are connected to the left and right output portions of the differential 3. When the EV system 10 is operated, the rotational torque of the motor 11 is transmitted from the motor rotation shaft to the drive wheels 5L, 5R from the left and right drive shafts 4L, 4R via the speed reducer 2 and the differential 3.

In the present embodiment, the front wheels 6L and 6R which are the steering wheels are driven wheels, but the EV system 10 may be applied to front wheel drive, and all wheels equipped with motor generators on the front wheels and the rear wheels respectively. It may be driven.
The reduction gear 2 is provided with a parking gear (not shown). This parking gear can be switched between locked and unlocked by an electrical signal.

Further, the vehicle 1A is provided with a weight sensor 31 that reacts to the weight of the driver when the driver is seated on the driver's seat 7 in the driver's seat 7, and in this control device, the weight sensor 31 is operated. This is used as driver detection means for detecting whether or not the driver is seated in the driver's seat 7.
Furthermore, the vehicle 1A is equipped with various electric devices such as an air conditioner system (air conditioner) 32, an audio system 33, and lamps 34 such as a headlight, a blinker, and a hazard lamp. The power source of these electric appliances is a high-voltage traveling battery 12, and the voltage of the traveling battery 12 is transformed by the DC / DC converters 8a and 8b and used. The air conditioner system 32 is supplied with electric power transformed to about 100 volts by the DC / DC converter 8a, and the audio system 33 and the lamps 34 are supplied with electric power transformed to about 24 volts by the DC / DC converter 8b. .

  Further, the vehicle 1A is keyless that can lock and unlock the door of the vehicle and start and stop the EV system (drive power plant) 10 without using a mechanical key (hereinafter also referred to as a key). An operation system (keyless system) is adopted. The vehicle door is locked and unlocked, and the EV system 10 is started and stopped by operating the power switch 14 without using a key.

  As shown in FIG. 2A, the power switch 14 of the present embodiment is a rotary switch that is twisted and operated. ROCK (off), ACC (accessory), ON (on), and START (EV system activation) Each mode is provided. When rotating from the ROCK position, ACC, ON, START, and modes are sequentially switched. With this power switch 14, each electric system of the vehicle 1A can be turned on and off.

  In such an electric system, in addition to the traveling motor 11, there are electric devices such as an air conditioner system 32, an audio system 33, and lamps 34. Among these, the traveling motor 11 that uses the high-voltage traveling battery 12 as it is is a high-voltage system, and the air conditioner system 32 that converts the high-voltage traveling battery 12 into a medium voltage and uses it is a medium-voltage system. The audio system 33 and the lamps 34 that use the high-voltage traveling battery 12 by converting it to a low voltage are a low-voltage system.

  When the power switch 14 is set to ROCK (off), all of the high voltage system, the medium voltage system, and the low voltage system are in a power supply cutoff state (shutdown state). Specifically, the inverter 13 is shut down in the case of a high voltage system, the DC / DC converter 8a is shut down in the case of a medium voltage system, and the DC / DC converter 8b is shut down in the case of a low voltage system. When the power switch 14 is set to ACC, only the low voltage system is in a power supply enabled state, and the high voltage system and the intermediate voltage system are in a power supply cutoff state. When the power switch 14 is set to ON, before the EV system 10 is started, the low voltage system and the medium voltage system are enabled, and the high voltage system is in a power supply cutoff state. When the power switch 14 is turned on after the EV system 10 is activated, the high voltage system, the medium voltage system, and the low voltage system are all in a power supply enabled state.

The power switch 14 is not limited to this, and for example, a push button switch that switches the mode by pressing may be applied. Further, the mode switching mode of the switch is not limited to that of this embodiment.
Further, the vehicle 1A is equipped with a shift operating device 15 for selecting and operating the shift range. The shift operating device 15 includes a selector lever 15a and a parking switch 16 as shown in FIG. It consists of and. In other words, the selector lever 15a can be used to select any one of the D (drive) range, N (neutral) range, R (reverse) range, and B (regenerative brake) range. In addition to the selector lever 15a, the push button type parking switch 16 is operated to make a selection.

  The selector lever 15a and the parking switch 16 output a signal corresponding to each selection operation to the EV ECU 20A, and the control corresponding to the selected range is performed through the EV ECU 20A. The selector lever 15a and the parking switch 16 are physically returned to the neutral position after the selection operation, and only the range display of the combination meter is switched to the display of the selected range.

As an activation operation for activating the EV system 10, the parking switch 16 is operated to set the shift range to the P (parking) range, and the power switch 14 is activated while the brake pedal (not shown) is depressed. Operate until the mode is reached. Depending on the configuration of the shift operation device 15, there is also a device that is not provided with the parking switch 16 and is set to the P (parking) range by operating the selector lever 15a. In this case, the shift range is set by operating the selector lever 15a. Set to the P (parking) range and operate the power switch 14 while depressing a brake pedal (not shown) until the EV system activation mode is set.
Further, the vehicle 1A is equipped with a display device 9 for displaying various information, and the display device 9 is also used for displaying information related to the present control device.

(Configuration of EV system control device)
This control device includes an electronic shift operation device 15 as a range selection means for selecting and operating a selection range of the transmission, and a weight sensor 31 as a driver detection means for detecting whether a driver is present in the driver's seat. And an EV ECU 20A as control means for performing shutdown control of the EV system 10 under predetermined conditions.

  When the range is selected by the electronic shift operating device 15, a signal corresponding to each selected range is output to the EV ECU 20A, and based on this, the EV ECU 20A controls each part according to the selected range through an electric signal. Therefore, the speed reducer 2 or the like is equipped with an electronic range attaining mechanism that achieves the range selected by the electrical signal. In particular, the parking gear attached to the speed reducer 2 is equipped with an electronic lock and unlock mechanism (electronic range attainment mechanism) that can be switched between lock and unlock by an electric signal.

  The EV ECU 20A is a known type control unit including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an input / output port, and the like. The EVECU 20A includes a shutdown control unit 21 that performs shutdown control, a notification unit 22 that notifies the fact when the shutdown control is performed, and a parking gear using the electronic lock and unlock mechanism described above under required conditions. Each of the functional elements is provided with a parking gear control unit 23 that achieves a parking range by switching to lock.

On the assumption that the vehicle 1A is stopped and the power switch 14 is turned on, the shutdown control unit 21 determines that the driver is absent from the driver's seat, the state of the selected range, and the in-vehicle electric When the operating state of the equipment meets the conditions, shutdown control is performed.
Specifically, in addition to satisfying both the following conditions (1) and (2), the shutdown control unit 21 satisfies the following conditions (3) and (4): Perform shutdown control.

(1) The power switch 14 is on.
(2) There is no driver in the driver's seat.
(3) The range is not a parking range.
(4) The range is a parking range and none of the predetermined conditions (conditions for performing control) are satisfied.

Here, the predetermined condition is a condition in which the shutdown control is not performed (that is, prohibited), and the following conditions are set.
(A) The electric devices such as the air conditioner system 32, the audio system 33, the lamps 34, etc. are operating. Note that the lamps 34 referred to here include lamps in the vehicle interior in addition to exterior lights such as headlamps.

Therefore, when the range is the parking range, if any of the electric devices such as the air conditioner system 32, the audio system 33, and the lamps 34 is operating, the shutdown control is prohibited, and the shutdown control unit 21 performs the shutdown control. Not implemented.
If the shift range is the parking range, the parking gear is locked, and therefore, an operation for switching the shift range to the travel range is required to start the vehicle, and the possibility that the vehicle suddenly starts is low.

  Moreover, as a use mode of the air conditioner system 32, the air conditioner system 32 is operated before entering the vehicle interior, or the air conditioner system 32 is operated even when leaving the vehicle temporarily, and the vehicle interior You may want to adjust the temperature. Further, when the user goes outside the vehicle for a short time, the audio system 33 and the lamps 34 are not turned off. Furthermore, there are cases where it is desired to use the lamps 34 of the vehicle 1A while stopping the vehicle 1A. In such a case, if the shift range is set to the parking range, the shutdown control is not performed, so that each device can be used conveniently.

In addition, when the driver leaves the driver's seat while using these devices, the driver often returns immediately to the driver's seat and starts the vehicle. This eliminates the need to start up the EV system 10 and improves operability.
Further, in the case of the air conditioner system 32, the audio system 33, the lamps 34, etc., if these devices are in operation, the operation of the devices can be recognized from outside the vehicle by operating sound, light irradiation, or the like. This is similar to the case where the vehicle 1A is stopped while the engine is running with the shift range set to the parking range in the engine vehicle. A pedestrian or the like around the vehicle is temporarily stopped by the driver. It is possible to detect that there is a high possibility that the vehicle immediately returns to the driver's seat and starts the vehicle.

In the present embodiment, when the shutdown control unit 21 performs the shutdown control by satisfying the above conditions (1), (2), (3), the parking gear control unit 23 Operate the electronic lock and unlock mechanism to switch the transmission range to the parking range.
Further, during the shutdown control, this is notified by the notification means including the notification unit 22 and the display device 9. That is, the notification unit 22 notifies the driver through the display device 9 by displaying a message such as “Shutdown is being performed because the system stop process has not been performed” as shown in FIG. 2C, for example.

As this notification means, the alarm lamp is turned on in accordance with or instead of the message display, the voice message is notified when the driver gets into the vehicle again, or the alarm sound is sounded. It may be a thing.
As described above, since the power switch 14 is set to ON through at least the ACC mode, the shutdown control unit 21 starts control from the time when the power switch 14 is set to ACC when the vehicle is stopped.

(Function and effect)
Since the control device of the EV system (electric drive system) according to the first embodiment of the present invention is configured as described above, the control can be performed, for example, as shown in the flowchart of FIG. The flow of FIG. 3 is started from the time when the power switch 14 is set to ACC when the vehicle is stopped.

As shown in FIG. 3, first, it is determined whether or not the power switch 14 is set to ON (step S10). If the power switch 14 is not on, there is no possibility that the vehicle 1A will start unexpectedly, so the process returns, and the determination in step S10 is performed again after a predetermined period.
When the power switch 14 is set to ON, it is determined whether or not the driver's seat is absent (step S20). If there is no driver's seat, there is no possibility that the vehicle 1A will start unexpectedly, and the process returns. If the driver's seat is absent, it is next determined whether or not the parking switch 16 is on (that is, the parking range is selected) (step S30).

  When the parking switch 16 is not on, that is, when the parking range is not selected, the vehicle 1A may start unexpectedly. First, the parking switch 16 is turned on using an electronic lock and unlock mechanism. A process of switching on (that is, switching the range to the parking range) is performed (step S40), and the high voltage system, the medium voltage system, and the low voltage system are all shut down to shut off the power supply (step S60). .

  In this case, since the parking switch 16 is turned on immediately before the shutdown, the possibility that the vehicle 1A starts unexpectedly at this time is avoided. However, this device considers the case where the electronic locking and unlocking mechanism malfunctions, suppresses standby current consumption, and applies appropriate processing (power switch 14 to the driver when leaving the vehicle). In order to prompt the user to turn off the parking switch 16 or turn on the parking switch 16, the shutdown is performed.

Further, during the shutdown control, the notification means including the notification unit 22 and the display device 9 notifies the fact (step S70). For example, as shown in FIG. 2C, the driver is notified of this by displaying a message such as “Shutdown is being performed because the system stop process has not been performed”.
On the other hand, when the parking switch 16 is on, it is determined whether or not all the electric devices are off (step S50). If any of the electric devices is off (is not operating and is not scheduled to operate), a shutdown is performed (step S60) and a notification to that effect is made (step S70). If any of the electric devices is on (in operation or scheduled to operate), the vehicle activation state (activation state of the EV system) is maintained without performing shutdown.

  When the parking range is selected, since the parking gear is operating, the vehicle is started against the parking gear. Therefore, even if the vehicle is in an activated state, the possibility that the vehicle will start is low. If the electric devices are in operation or are scheduled to operate, it is considered that the driver has left the vehicle 1A intentionally with the power switch 14 turned on. And reduce convenience. However, if the electric devices are not in operation and are not scheduled to operate, the operability and convenience of the vehicle will not be reduced even if the shutdown is performed.

  Therefore, when the parking switch 16 is on and all the electric devices are off, the shutdown is performed to further reduce the possibility that the vehicle without the driver will start unexpectedly. If any of the devices is on, the vehicle activation state (activation state of the EV system 10 or the like) is maintained without shutting down, and the operability and convenience of the vehicle are ensured.

  According to the present control device, when the power switch 14 is turned on and the parking switch 16 is turned off (the parking gear is not activated), there is a possibility that a vehicle in which the driver is absent may start unexpectedly. However, since the shutdown control for ending the startup state of the EV system 10 is performed, the possibility that the vehicle in which the driver is absent will start unexpectedly is avoided. At the same time, unnecessary standby power can be reduced.

  When the parking switch 16 is on (the parking range is selected) and the parking gear is operating, there is a low risk that a vehicle without a driver will start unexpectedly. Since the shutdown control is performed unless the predetermined condition that the vehicle is in operation is satisfied, the possibility that the vehicle in which the driver is absent starts unexpectedly can be avoided. At the same time, unnecessary standby power can be further reduced.

  If any one of the electric devices such as the air conditioner system 32, the audio system 33, and the lamps 34 is operating, the shutdown control is not performed. However, if the electric devices are operating, this operation is performed from outside the vehicle with an operating sound or the like. Since it can be recognized, pedestrians around the vehicle can sense that the vehicle is temporarily stopped and that the driver is likely to return to the driver's seat and start the vehicle immediately.

  Further, the air conditioner system 32 or the like may want to continue driving even if it is away from the vehicle 1A, and the driver may consciously operate the electric devices. In this case, it is contrary to the driver's will to end the operable state of the electric devices (become inoperable), but this can be avoided. In addition, when the driver leaves the driver's seat 7 with passengers or pets remaining in the vehicle 1A, the EV system 10 is consciously activated by, for example, turning on a hazard lamp or a room light. It can also be maintained.

  In addition, when the parking switch 16 is not turned on, shutdown control is performed after the parking switch 16 is turned on using an electronic lock and unlock mechanism. In general, the parking gear is in an activated state as a condition for external charging. Therefore, by switching on the parking switch 16 in this manner, Charging can be performed smoothly.

In addition, since the driver is notified that the shutdown control has been carried out, the driver can recognize that the shutdown has been performed, thereby failing to satisfy the conditions for external charging and hindering external charging. Can also respond appropriately.
Since the weight sensor 31 installed in the driver's seat is applied to the driver detection means, it can be easily detected that the driver is absent.

[Second Embodiment]
(Vehicle configuration)
FIG. 4 is a main part configuration diagram of a hybrid electric vehicle (HEV) according to the present embodiment. In FIG. 4, the same reference numerals as those in FIG. 1 denote the same parts, and a part of the description thereof will be omitted.
As shown in FIG. 4, the hybrid electric vehicle (hereinafter also simply referred to as a vehicle) 1B includes a motor generator (as a driving power plant) similar to the electric vehicle (EV) of the first embodiment shown in FIG. In addition to a drive system for the rear wheels 5L and 5R having a motor generator 11, a running battery 12, and an inverter 13, an engine (internal combustion engine) 50, an automatic transmission 51, a generator (generator) 52, a motor generator (Motor generator, motor) 53, an inverter 54, a clutch 55, and a drive system for the front wheels 6L, 6R provided with an engine ECU 56 are added. The HEVECU 20B that integrates and controls the drive system for the rear wheels 5L and 5R and the drive system for the front wheels 6L and 6R is provided, and the HEV system (electric drive system) 100 is configured. The engine ECU 56 and the HEVECU 20B are known types of control units including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an input / output port, and the like.

  The drive system for the front wheels 6L, 6R will be described. The engine 50 is connected to the generator 52 via the automatic transmission 51, and is connected to the input portion of the front wheel differential 3F via the automatic transmission 51 and the clutch 55. ing. When the clutch 55 is connected, the output torque of the engine 50 is transmitted from the left and right drive shafts 4L, 4R to the drive wheels 5L, 5R via the front wheel side differential 3F.

  The generator 52 is controlled by an inverter 54 and generates power upon receiving the output torque of the engine 50. If the clutch 55 is disengaged, the output torque of the engine 50 is used exclusively for power generation, and if the clutch 55 is connected, the power generation is stopped and the output torque of the engine 50 is used exclusively for travel driving or the output torque of the engine 50 is used. It can be distributed and used for traveling drive and power generation. The output torque of engine 50 is controlled by engine ECU 56 under the integrated control of HEVECU 20B.

  The motor 53 is directly connected to the input portion of the front-wheel differential 3F and is controlled by an inverter 54. When operating the generator 52, the inverter 54 supplies the generated power to the motor 53 or supplies the battery 12 for traveling. Further, when the generator 52 is not operated or when the power generated by the generator 52 is insufficient, electric power is supplied from the traveling battery 12 to the motor 53.

The operation of the inverter 54 and the operations of the automatic transmission 51 and the clutch 55 are controlled under the integrated control of the HEVECU 20B.
For example, if the remaining capacity of the traveling battery 12 is sufficient and the output request of the vehicle 1B can be covered by the motors 11 and 53, the clutch 55 is disengaged and the engine 50 is stopped, and the motors 11 and Power is supplied to 53 to obtain traveling torque and travel.

  Further, when the remaining capacity of the traveling battery 12 decreases, the clutch 55 is disconnected and the engine 50 is operated, and the generator 50 is operated by the engine 50 to generate power, and this generated power is charged to the traveling battery 12. The series running is performed while supplying the generated power to the motors 11 and 53 or supplying the generated power to the motors 11 and 53 in addition to the power of the running battery 12.

When the output demand of the vehicle 1B increases, such as at high speed, the clutch 55 is connected and the engine 50 is operated, and the motors 11 and 53 are operated while appropriately distributing the output torque of the engine 50 to the power generation and driving of the generator 52. To run in parallel.
Further, this vehicle 1B employs a remote operation system, and the operation of the air conditioner system, the warm-up of the engine 50, the plug-in system, etc. from a place away from the vehicle 1B by wireless communication through the remote controller or the smartphone 110. It is possible to remotely control the external charging of the traveling battery 12 using. However, various safety measures are prepared for the operating conditions of the remote control system.

For this reason, in this control apparatus, the following conditions (b) and (c) are added to the condition (a) of the first embodiment as a predetermined condition that is a condition for prohibiting the shutdown control. Three predetermined conditions b) and (c) are provided.
(A) The electric devices such as the air conditioner system 32, the audio system 33, the lamps 34, etc. are operating.

(B) The engine 50 is operating.
(C) The HEV system 100 or electric devices are operating by the remote control system.
The condition (b) is because if the engine 50 is in operation, a person approaching the vehicle 1B can recognize the possibility of starting the vehicle 1B from the operation sound of the engine 50 and does not need to be shut down. .

Condition (c) includes various safety measures such as that the operation condition of the remote operation system is, for example, that the operation of the HEV system (electric drive system) is prohibited and the clutch 55 is not connected. This is because the operation of the HEV system 100 or the electric devices by the remote operation system is unlikely to start the vehicle 1B.
Since the configuration other than the above is the same as that of the first embodiment, the description thereof is omitted here.

(Function and effect)
Since the control device of the HEV system (electric drive system) according to the second embodiment of the present invention is configured as described above, the control can be performed, for example, as shown in the flowchart of FIG. The flow of FIG. 5 is started from the time when the power switch 14 is set to ACC when the vehicle is stopped.

As shown in FIG. 5, first, it is determined whether or not the power switch 14 is set to ON (step S10). If the power switch 14 is not on, there is no possibility that the vehicle 1 will start unexpectedly, so the process returns, and the determination in step S10 is performed again after a predetermined period.
When the power switch 14 is set to ON, it is determined whether or not the driver's seat is absent (step S20). If there is no driver's seat, the vehicle 1 returns because there is no possibility that the vehicle 1 will start unexpectedly. If the driver's seat is absent, it is next determined whether or not the parking switch 16 is on (that is, the parking range is selected) (step S30).

  When the parking switch 16 is not turned on, that is, when the parking range is not selected, the vehicle 1 may start unexpectedly. First, the parking switch 16 is turned on using an electronic lock and unlock mechanism. A process of switching on (that is, switching the range to the parking range) is performed (step S40), and the high voltage system, the medium voltage system, and the low voltage system are all shut down to shut off the power supply (step S60). .

Further, during the shutdown control, the notification means including the notification unit 22 and the display device 9 notifies the fact (step S70). For example, as shown in FIG. 2C, the driver is notified of this by displaying a message such as “Shutdown is being performed because the system stop process has not been performed”.
On the other hand, if the parking switch 16 is on, it is determined whether or not all the electric devices are off (not operating and not scheduled to operate) (step S50). If any of the electric devices is on (in operation or scheduled to operate), the vehicle activation state (activation state of the EV system or the like) is maintained without performing shutdown.

  If all the electric devices are off, whether or not the remote control is operating, that is, the HEV system 100 or the electric devices (including those that do not emit operating noise) is operated by the remote operation system. It is determined whether it is in the middle (step S52). If the remote control is in operation, the vehicle activation state (EV system activation state) is maintained without performing shutdown.

If the remote control is not operating, it is determined whether or not the engine is operating (including the case where the operation is scheduled) (step S54). If the engine is operating, the vehicle activation state (EV system activation state) is maintained without performing shutdown. On the other hand, if the engine is operating, a shutdown is performed (step S60) and a notification to that effect is made (step S70).
In the present embodiment, the determination of whether or not the remote controller is operating (step S52) and the determination of whether or not the engine is operating (step S54) are added to the first embodiment. The following effects are added to the first embodiment.

Since various safety measures are prepared for the operating conditions of the remote operation system, the operation of the HEV system 100 or the electric devices by the remote operation system is not required to shut down because there is no possibility that the vehicle 1B starts. Excessive shutdown control can be avoided.
If the engine 50 is in operation, a person approaching the vehicle 1B has a high possibility that the vehicle 1B is temporarily stopped from the operation sound of the engine 50 and the driver immediately returns to the driver's seat and starts the vehicle. Can sense that.

[Third Embodiment]
In the present embodiment, in addition to the conditions related to the devices of the first embodiment, the elapsed time from the start of detection that the driver is absent is within a predetermined time in addition to the predetermined conditions for prohibiting the shutdown control. Is set.
That is, in this embodiment, the following condition (d) is added to the condition (a) of the first embodiment as a predetermined condition that is a condition for prohibiting the shutdown control, and two predetermined conditions (a) and (d) are added. A condition is provided, and the shutdown control in which any one of the predetermined conditions (a) and (d) is satisfied is prohibited.

(A) The electric devices such as the air conditioner system 32, the audio system 33, the lamps 34, etc. are operating.
(D) The elapsed time from the start of detection that the driver is absent is within a predetermined time.
The predetermined time of the condition (d) is based on the assumption that the driver does not leave the vehicle 1A even if he / she gets off the vehicle 1A, for example, assists passengers to get on and off or opens / closes the trunk room. For example, the time can be set to about several tens of seconds.

Since the configuration other than the above is the same as that of the first embodiment, the description thereof is omitted here.
(Function and effect)
Since the control device of the EV system (electric drive system) according to the third embodiment of the present invention is configured as described above, the control can be performed, for example, as shown in the flowchart of FIG. The flow of FIG. 6 is started from the time when the power switch 14 is set to ACC when the vehicle is stopped.

As shown in FIG. 6, in the control according to the present embodiment, steps S22, S24, S26, S32, S34, and S52 are added to the processing of the first embodiment (FIG. 3). A part of the description of the same steps as in FIG. 3 is omitted.
That is, first, it is determined whether or not the power switch 14 is set to ON (step S10). If the power switch 14 is not ON, there is no possibility that the vehicle 1A will start unexpectedly. After the cycle, the determination in step S10 is performed again.

  When the power switch 14 is set to ON, it is determined whether or not the driver's seat is absent (step S20). If there is no driver's seat, the vehicle 1A will not start unexpectedly, the timer is stopped and reset to 0 (step S32), the flag F is set to 0 (step S34), and the process returns. The timer starts and starts counting when the absence of the driver's seat is detected (that is, when the driver sitting in the driver's seat leaves the driver's seat), and the driver is seated in the driver's seat. At that time, the timer is stopped and reset to zero. The flag F is 0 when the driver is seated in the driver's seat and 1 when the driver is not seated.

  On the other hand, if the driver's seat is absent, it is determined whether or not the flag F is 0 (step S22). If the flag F is 0, that is, the driver who has been seated until now has the driver's seat. If it has left, the timer starts counting (step S24), the flag F is set to 1 (step S26), and whether or not the parking switch 16 is on (ie, the parking range is selected). Is determined (step S30). When the flag F is 1, the process proceeds from step S22 to step S30.

  In step S30, if the parking switch 16 is not on, that is, if the parking range is not selected, the vehicle 1A may start unexpectedly. First, using the electronic lock and unlock mechanism, The parking switch 16 is turned on (that is, the range is switched to the parking range) (step S40), and the process proceeds to step S52.

  On the other hand, if the parking switch 16 is on, it is determined whether or not all the electric devices are off (not operating and not scheduled to operate) (step S50). Here, if all the electric devices are off, the process proceeds to step S52. If any of the electric devices is on (in operation or scheduled to operate), the process returns, and the vehicle activation state (activation state of the EV system or the like) is maintained without performing shutdown.

In step S52, it is determined whether the timer value (timer count value) T has reached the set time T1 or more. If the timer value T has not reached the set time T1, the process returns to the vehicle without shutting down. The startup state (EV system startup state) is maintained.
When the timer value T reaches the set time T1 or more, shutdown is performed to turn off all the high voltage system, medium voltage system, and low voltage system (step S60).

Further, during the shutdown control, the notification means including the notification unit 22 and the display device 9 notifies the fact (step S70).
In this embodiment, in addition to the effects of the first embodiment, when the driver leaves the driver's seat for a short time, the driver does not shut down, so that the driver can, for example, assist passengers to get on and off or open the trunk room. When the user leaves the driver's seat for a short time in order to perform the closing operation, the EV system continues to operate, and it is not necessary to perform a predetermined starting operation for the starting operation, thereby improving the operability of the vehicle, Convenience is ensured because there is no stoppage of electric devices.

[Others]
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, It can implement by deform | transforming said embodiment suitably or employ | adopting a part.
In particular, in order to avoid the above problems, the predetermined condition is focused on the point that if the shutdown control is performed, the operability and convenience of the automobile are impaired, and the vehicle is unlikely to start unexpectedly. Appropriate conditions can be set.

The purpose of the present invention is to eliminate the problem that the vehicle starts without any foreseeing and almost no sound, but as a countermeasure, the shutdown to be performed is not to be over-controlled. is necessary.
In addition, the structure of an electric vehicle or a hybrid electric vehicle is not limited to said embodiment, It can apply to the thing of various structures.

The power switch, range selection means, and driver detection means are not limited to the above-described embodiment, and can be applied to various configurations. For example, a camera or a seat belt sensor can be applied to the driver detection means.
In addition, regarding the predetermined condition in which the shutdown control is not performed, the first and third embodiments are based on the condition that the electric devices mounted on the vehicle are operating or scheduled to operate, but are limited to the electric devices. First, it can be applied as a predetermined condition that other devices mounted on the vehicle such as the engine of the hybrid electric vehicle in the second embodiment are operating or scheduled to operate.

Further, a configuration in which the shutdown is not performed when the driver of the third embodiment leaves the driver's seat for a short time may be applied to the second embodiment. In this case, for example, the processing flow is obtained by adding steps S22, S24, S26, S32, S34, and S52 of FIG. 6 to the corresponding portions of FIG.
Further, when an electronically controlled parking brake capable of operating the parking brake by electronic control is provided, it is conceivable to switch the electronically controlled parking brake to the brake operating state before performing the shutdown control. In this case, in consideration of sticking of the parking brake in a cold region, it may be switched to an operating state if the outside air temperature is equal to or higher than a predetermined temperature.

1A Electric car (vehicle)
1B Hybrid electric vehicle (vehicle)
2 Transmission (reduction gear)
3 Differential (Rear wheel differential)
3F Front wheel differential 4L, 4R, 4FL, 4FR Drive shaft 5L, 5R Rear wheel 6L, 6R Front wheel 7 Driver's seat 8a, 8b DC / DC converter 9 Display device (display means)
10 EV system (electric drive system)
11 Motor generator (motor generator, motor)
DESCRIPTION OF SYMBOLS 12 Battery for driving | running | working 13 Inverter 14 Power switch 15 Shift operation apparatus 15a Selector lever 16 Parking switch 20A EVECU (control means)
21 Shutdown control unit 22 Notification unit 23 Parking gear control unit 31 Weight sensor (driver detection means)
32 Air conditioner system (air conditioner)
33 Audio system 34 Lamps 50 Engine (internal combustion engine)
51 Automatic transmission 52 Generator
53 Motor generator (motor generator, motor)
54 Inverter 55 Clutch 56 Engine ECU
100 HEV system (electric drive system)
110 Remote control device or smartphone

Claims (8)

A control device for an electric drive system that is installed in an electric vehicle, can start a vehicle only with a driving motor, and starts from a start end state by a predetermined start operation,
Driver detection means for detecting whether a driver is present in the driver's seat of the vehicle;
Range selection means for selecting and operating a shift range of the transmission of the vehicle;
Control means for performing shutdown control for terminating the activation state of the drive system according to the selection range by the range selection means and the detection result of the driver detection means, and
The control means performs the shutdown control when it is detected that the driver is absent by the driver detection means, and the selection range by the range selection means is other than a parking range, Control device for electric drive system. The shutdown control is configured to end the activation state of the drive system and end the operable state of the equipment mounted on the vehicle,
The predetermined control means detects that the driver is absent by the driver detection means, and when the selected range is a parking range, performs the shutdown control if a predetermined condition is not satisfied, If the predetermined condition is satisfied, the shutdown control is prohibited,
2. The control device for an electric drive system according to claim 1, wherein the predetermined condition includes that the device is operating or scheduled to operate. 3. The electric drive system control device according to claim 2, wherein the device includes an electric device including any one of an air conditioner system, an audio system, and a lamp. The vehicle is a hybrid electric vehicle equipped with an engine,
The control device for an electric drive system according to claim 2, wherein the engine is included in the device. 3. The predetermined condition includes that an elapsed time from the start of detection that the driver is absent by the driver detection means is within a predetermined time. The control apparatus of the electric drive system of any one of -4. The electric drive system according to any one of claims 1 to 5, wherein a remote operation system capable of setting the operation or operation schedule of the device by remote operation is applied to the vehicle. Control device. The vehicle is equipped with an electronic range attainment mechanism that achieves the range selected by the range selection means by means of an electrical signal,
7. The electric drive system according to claim 1, wherein the control unit switches the range to a parking range by the electronic range attainment mechanism before the shutdown control is performed. Control device. The control device for an electric drive system according to any one of claims 1 to 7, further comprising a notification unit that notifies the fact when the shutdown control is performed.

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