JP6344324B2 - Control device for hybrid vehicle - Google Patents

Description

  The present invention relates to a control device that is mounted on a hybrid vehicle and controls a storage state of a battery.

  Devices that control the state of charge (SOC) of a battery are disclosed in, for example, Patent Literature 1 and Patent Literature 2. In these conventional control devices, traffic information on a route on which the vehicle is scheduled to travel is acquired from a navigation system or the like, and a target for controlling the battery storage amount based on the acquired traffic information and the current position of the vehicle, A target value is set. Then, control is performed to bring the battery power storage amount closer to the set target value. With this control, the conventional control device realizes battery storage state control (SOC control) suitable for road conditions.

  In order to reduce exhaust gas and improve fuel consumption, it is preferable to drive the vehicle with a motor instead of an engine during traffic jams. Therefore, in a conventional control device, for example, when a section where a traffic jam occurs on a route on which the vehicle is scheduled to travel is detected, the traffic jam section is detected until the vehicle catches up at the end of the traffic jam section. Control is performed to increase the target value of the battery storage amount compared to when it is not. With such control, a conventional control device or the like can run the motor of the vehicle in a traffic jam for a long time.

JP 2014-015125 A JP 2000-134719 A

  In the above-described conventional control device or the like, for example, when the execution of control to increase the target value of the battery power storage amount at a position close to the traffic jam section is started, the vehicle immediately catches up to the tail of the traffic jam section, There may be a case where the control is completed in a short time.

The present invention has been made in view of the above problems, and provides a control device for a hybrid vehicle that can suppress the control for increasing the target value of the battery storage amount from being executed for a short time. Objective.

In order to solve the above-mentioned problem, the present invention is a control device that controls the storage state of a battery of a hybrid vehicle, an acquisition unit that acquires traffic information related to a current position of the vehicle and a planned travel route of the vehicle, and traffic information. And a detection unit for detecting a traffic jam area where traffic jam occurs on the planned travel route based on predetermined map information, and a power storage amount control for bringing the battery power storage amount closer to a predetermined target value, thereby detecting a traffic jam zone. and when, and a control unit capable of executing the target value control to increase the target value than when congestion section is not detected, the control unit is congested section by the detecting unit in a state that is not running the target value control If but is detected, the distance to the end of the detected congested section from the current position of the vehicle does not run a target value control is equal to or less than a predetermined value, congestion area detected from the current position of the vehicle The distance to the end is you run value control if exceeds a predetermined value, characterized in that.

  In the hybrid vehicle control device according to the present invention, when the control unit detects a traffic jam section by the detection unit in a state where the control (target value control) for increasing the target value of the battery storage amount is not executed, If the distance from the current position to the end of the traffic jam section is less than the predetermined value, the control is not executed. If the distance from the current position of the vehicle to the tail of the traffic jam section exceeds the predetermined value, the control is executed. To do. That is, the control for increasing the target value of the battery storage amount is not performed only when a traffic jam in which the distance from the current position of the vehicle to the tail of the traffic jam section is a predetermined value or less is detected. As a result, for example, a traffic jam section detected at a position close to a predetermined value or less from the vehicle can be excluded from the control target for increasing the target value of the battery storage amount, and the control is prevented from being executed for a short time. it can.

As described above, according to the control apparatus for a hybrid vehicle of the present invention, it is possible to suppress the control (target value control) for increasing the target value of the battery power storage amount from being executed for a short time .

The figure which shows the structural example of the control apparatus of the hybrid vehicle which concerns on one Embodiment of this invention. The figure which shows an example in which the electrical storage state of a battery is controlled by this control apparatus The figure which shows an example of the display mode in the display part of this control apparatus. Flowchart for explaining storage state control of a battery performed by the present control device The figure which shows a response | compatibility with the electrical storage state control of the battery which this control apparatus performs, and the display of a display part

[Overview]
The present invention is a control device that controls a storage state of a battery of a hybrid vehicle. In the present control device, the control to increase the battery storage amount to the target value (storage amount control) and the control to increase the target value based on the positional relationship between the traffic jam detected on the planned travel route of the vehicle and the vehicle (target value) Control). If the target value control is not executed when a traffic jam is detected, the target value control is executed if the distance from the vehicle to the traffic jam exceeds a predetermined value, and is not executed if the distance from the vehicle to the traffic jam is a predetermined value or less. . Thereby, for example, traffic congestion detected at a position close to a predetermined value or less from the vehicle can be excluded from the target of battery target value control, and execution of target value control for a short time can be suppressed. Moreover, it can suppress that the display which shows that target value control is performed only for a short time in a display means. Therefore, the possibility that the driver may feel uncomfortable with respect to the storage state control (SOC control) of the battery can be reduced.

[Configuration example of control device]
FIG. 1 is a diagram illustrating a configuration example of a control apparatus 1 for a hybrid vehicle according to an embodiment of the present invention. The hybrid vehicle control device 1 shown in FIG. 1 includes a navigation ECU 10, a hybrid ECU 20, a battery 30, and a display unit 40. The navigation ECU 10, the hybrid ECU 20, the battery 30, and the display unit 40 are connected to be communicable with each other via a vehicle-mounted network (Control Area Network: CAN) 50 or by wireless communication. In the following description, the hybrid vehicle is simply referred to as “vehicle”.

  The navigation ECU 10 is, for example, an electronic control unit (ECU) serving as the center of a so-called navigation system having a function of setting a travel route from the current position of the vehicle to a destination and guiding the set travel route. It is. The electronic control unit includes a central processing unit (CPU) that executes a predetermined control program, a memory that stores the control program, an input / output interface (all not shown), and the like. The navigation ECU 10 exhibits a function of acquiring information to be described later and a function of detecting a traffic jam section when the CPU reads and interprets and executes a control program stored in the memory.

  As shown in FIG. 1, the navigation ECU 10 is connected to a GPS receiving unit 11, a VICS receiving unit 12, and a map information database 13, respectively. The map information database 13 may be incorporated in the navigation ECU 10.

  The GPS receiver 11 receives a GPS signal transmitted from a satellite of the global positioning system (GPS). The navigation ECU 10 acquires information on the current position of the vehicle based on the GPS signal received by the GPS receiver 11. Note that the information on the current position of the vehicle may be acquired based on a signal detected by a vehicle speed sensor or an acceleration sensor (not shown) mounted on the vehicle. Moreover, you may acquire the information of the present position of a vehicle using systems other than GPS.

  The VICS receiving unit 12 is connected to a VICS (Vehicle Information and Communication System (registered trademark)), which is one of external infrastructure systems that distribute traffic information to vehicles, and receives traffic information distributed from the VICS center. . The navigation ECU 10 acquires traffic information via the VICS receiver 12. The traffic information includes various information such as traffic jams, congestion, speed restrictions, lane restrictions, accidents, and broken cars. The traffic information may be acquired using a system other than VICS.

  The map information database 13 is composed of a recording medium such as a DVD (Digital Versatile Disk), an SD card (Secure Digital Card), or an HDD (Hard Disk Drive). The map information database 13 stores map information (for example, roads, national road numbers, intersection names, lane signs) necessary for the navigation function performed by the navigation ECU 10. The map information database 13 may have a function of learning past travel history and the like.

  The navigation ECU 10 of the present embodiment is based on the traffic information acquired by the VICS receiver 12 and the map information stored in the map information database 13 (hereinafter referred to as “travel planned route”). ) It is configured to detect a traffic jam section where a traffic jam has occurred. Further, the navigation ECU 10 of the present embodiment is configured to obtain the distance from the current position of the vehicle to the tail of the traffic jam section based on the information on the current position of the vehicle acquired by the GPS receiver 11.

  The hybrid ECU 20 is an electronic control unit (ECU) that calculates necessary engine output, motor torque, and the like from the accelerator opening, vehicle speed, and the like, and controls overall driving of the engine and motor (not shown). The hybrid ECU 20 is also an electronic control unit that controls the SOC of the battery 30 (SOC control). This electronic control unit also includes a CPU that executes a predetermined control program, a memory that stores the control program, and an input / output interface. The hybrid ECU 20 exhibits a function of controlling a storage state of the battery 30 to be described later when the CPU reads and interprets and executes the control program stored in the memory.

  The hybrid ECU 20 sets a target value that is a target for controlling the amount of power stored in the battery 30 when controlling the power storage state of the battery 30. The hybrid ECU 20 controls the drive of the motor and the engine to perform control so that the amount of power stored in the battery 30 approaches the target value (hereinafter, this control is referred to as “power storage amount control”). See FIG. 2 (a). For example, discharge by power supply when the vehicle is accelerated and charging by regenerative braking when the vehicle is decelerated are appropriately controlled to bring the stored amount of the battery 30 close to the target value. The amount of electricity stored in the battery 30 can be obtained using, for example, a signal output from a voltage sensor or a current sensor provided in the battery 30.

  Further, the hybrid ECU 20 of the present embodiment, when a traffic congestion section is detected by the navigation ECU 10, increases the target value of the battery 30 until the vehicle arrives at the tail end of the detected traffic congestion section (hereinafter, this control is performed). “Target value control”) is possible. Specifically, the hybrid ECU 20 increases the target value when the traffic jam section is detected, higher than the target value when the traffic jam section is not detected. See FIG. 2 (b). For example, if the target value in the storage amount control executed when no traffic jam is detected is “50%” of the battery full storage amount, the target value in the storage amount control executed when the traffic jam section is detected is set to the battery. It is assumed that “60%” of the full power storage amount. Thereby, in the control apparatus 1 of this hybrid vehicle, the motor driving | running | working of the vehicle in traffic congestion is enabled for a long time.

  Further, the hybrid ECU 20 of the present embodiment is in a state in which the target value control is not executed based on the information on the traffic jam section given from the navigation ECU 10 and the information on the distance from the current position of the vehicle to the tail of the traffic jam section. When the traffic congestion section is detected by the navigation ECU 10, if the distance from the current position of the vehicle to the tail end of the traffic congestion section is less than or equal to a predetermined value, target value control is not executed and the current position of the vehicle to the tail end of the traffic congestion section If the distance exceeds the predetermined value, the target value control is executed. Thereby, in the control apparatus 1 of this hybrid vehicle, it is suppressed that target value control is performed only for a short time about the detected traffic jam area.

  The display unit 40 is, for example, a display or a meter, and performs a display notifying the driver that the target value control is being executed only while the hybrid ECU 20 is executing the target value control. This display is performed, for example, by turning on a display lamp as shown in FIG. The display destination may be a screen of a navigation device or a projection screen by a head-up display.

[Battery charge state control]
FIG. 4 is a flowchart illustrating a battery storage state control method performed by the hybrid vehicle control device 1 according to the embodiment of the present invention. In the following description, it is assumed that the guide route corresponding to the planned travel route has been set in advance by the navigation ECU 10. Of course, even if the guide route is not set, for example, a route from the current position of the vehicle to the home, a route that can be predicted from a past travel history, and the like can be used.

  The battery storage state control (SOC control) shown in FIG. 4 is started, for example, when the vehicle power supply is turned on (IG_ON) and the vehicle control system operates. Immediately after the start, only storage amount control is performed to bring the battery storage amount close to a predetermined target value. In the battery storage state control (SOC control), the processes in steps S401 to S410 are repeatedly executed until a predetermined system termination condition is satisfied (step S411). The predetermined system termination condition is, for example, that the vehicle power supply is turned off (IG_OFF) and the vehicle control system is stopped.

  When the storage amount control of the battery is started, the traffic information related to the planned travel route received by the VICS receiver 12 and the map information stored in the map information database 13 are acquired by the navigation ECU 10 (step S401). Next, based on the traffic information and map information acquired in step S401, the navigation ECU 10 searches for a traffic jam section where traffic jam has occurred on the planned travel route (step S402). When the search for the traffic jam section is completed, the hybrid ECU 20 determines whether or not the target value control is already being executed (step S403).

  If it is determined in step S403 that the target value control has already been executed (step S403: Yes), that is, if the target value control has been executed for the traffic jam section detected in the previous processing routine, the process proceeds to step S408. The target value control being executed is continuously performed. On the other hand, if the target value control is not executed in the determination of step S403 (step S403: No), that is, the traffic jam section has not been detected in the previous processing routine, or the target value control for the detected traffic jam section is not performed. If it has already ended, the process proceeds to step S404, and it is determined whether or not a traffic jam section has been detected in the current processing routine.

  If it is determined in step S404 that a traffic jam section is not detected (step S404: No), there is no target for which target value control is to be executed, and the process proceeds to step S411. On the other hand, if it is determined in step S404 that a traffic jam section has been detected (step S404: Yes), the process proceeds to step S405 to determine whether target value control should be executed for the detected traffic jam section. Is done.

  When a traffic jam section is detected in a situation where target value control is not being executed, the hybrid ECU 20 determines whether the distance D from the current position of the vehicle to the tail end of the detected traffic jam section is equal to or less than a predetermined value Th. (Step S405). When the distance D is not less than or equal to the predetermined value Th (step S405: No), the hybrid ECU 20 executes target value control for the detected traffic jam section (step S406). On the other hand, when the distance D is equal to or smaller than the predetermined value Th (step S405: Yes), the detected traffic jam section is excluded from the target of target value control (step S407). By being excluded from the target, the target value control is not executed for the traffic jam section detected in the current processing routine.

  In step S406, when target value control is executed for the detected traffic jam section, the occurrence of a specific event that requires re-searching of the traffic jam section (step S408) and the condition for termination of the target value control (step S409) are detected. Are sequentially determined. The specific event requiring the re-search of the traffic jam section determined in step S408 is, for example, a reroute by the navigation ECU 10 when the traffic information received by the VICS receiver 12 is updated and the vehicle deviates from the guide route. An event such as a process being performed. The condition for ending the target value control determined in step S409 is a condition that satisfies any one of, for example, that the vehicle has reached the tail end of a traffic jam section, or that route guidance has been stopped. The end of the target value control means returning to the execution of only the storage amount control.

  When a specific event that requires re-searching of the traffic jam section occurs (step S408: Yes), the process returns to step S401, and the traffic jam section on the planned travel route based on the latest traffic information received by the VICS receiver 12 The re-search is performed by the navigation ECU 10. On the other hand, when a specific event that requires a re-search of the traffic jam section does not occur and the condition for the target value control end is satisfied (step S409: Yes), the target value control that has been executed for the traffic jam section by the hybrid ECU 20 is performed. The process ends (step S410).

[Relationship between battery state control and display on display]
FIG. 5 is a diagram illustrating the relationship between the battery storage state control (SOC control) performed by the control device 1 of the hybrid vehicle and the display on the display unit 40.

  FIG. 5A is a scene where only the storage amount control is being executed (target value control is not being executed), and the current traffic condition of the vehicle at the time when the traffic jam section is newly detected and the traffic jam section is detected. It is a figure explaining the case where the distance D to a position and the tail end of a congestion area exceeds predetermined value Th (D> Th).

  As shown in FIG. 5A, when the period during which the target value control can be executed is sufficiently long, if the execution of the target value control is started from the current vehicle position, the target is reached until the vehicle reaches the end of the traffic jam section. It can be sufficiently expected that the effect of value control, that is, the charged amount of the battery 30 approaches a high target value. Further, the display by the display unit 40 informing that the target value control is being executed can also be displayed continuously for a sufficiently long time, and the driver feels uncomfortable with the battery charge state control (SOC control). There is no fear. Therefore, the control device 1 of the hybrid vehicle performs a process of executing the target value control in a scene where the distance D> the predetermined value Th (Step S405 in FIG. 4: No).

  FIG. 5B shows the current vehicle state at the time when a traffic jam section is newly detected and a traffic jam section is detected in a scene where only the storage amount control is executed (target value control is not executed). It is a figure explaining the case where the distance D to a position and the tail end of a traffic congestion area is below predetermined value Th (D <= Th).

  As shown in FIG. 5B, if the period during which the target value control can be executed is short, even if the execution of the target value control is started from the current vehicle position, the target value is reached until the vehicle reaches the end of the traffic jam section. There is a possibility that the effect of the control cannot be sufficiently exhibited, that is, the charged amount of the battery 30 does not approach a high target value. In addition, since the display by the display unit 40 notifying that the target value control is being executed can be displayed only for a short time, the driver may feel uncomfortable with the battery storage state control (SOC control). . Therefore, the control device 1 of the present hybrid vehicle performs a process of excluding the detected traffic jam section from the target in the scene of the distance D ≦ predetermined value Th and not executing the target value control (step S405 in FIG. 4: Yes). .

  FIG. 5C and FIG. 5D show the time when a traffic jam section is newly detected and the traffic jam section is detected in a scene where the target value control is already executed in addition to the storage amount control. FIG. 6 is a diagram for explaining a case where a distance D from a vehicle current position to the tail end of a traffic jam section is equal to or smaller than a predetermined value Th (D ≦ Th) and exceeds a predetermined value Th (D> Th).

  As shown in FIGS. 5C and 5D, if the target value control has already been executed, the display by the display unit 40 notifying that the target value control is being executed is also continuously displayed. . Therefore, if the target value control that has been executed is stopped at the distance D from the current position of the vehicle to the tail end of the traffic jam section, the driver feels uncomfortable with respect to the battery charge state control (SOC control). There is a fear. Moreover, the effect by target value control will also fall. Therefore, the control device 1 of the hybrid vehicle performs a process of continuing the execution of the target value control regardless of the distance D in the scene where the target value control is already being executed (step S403: No in FIG. 4).

[Effect of the embodiment]
As described above, in the hybrid vehicle control device 1 according to an embodiment of the present invention, when a traffic jam section is detected on the planned travel route of the vehicle in a state where the target value control is not executed, the current position of the vehicle is detected. If the distance D to the tail end of the traffic jam section is equal to or less than the predetermined value Th, the target value control of the battery 30 is not executed. Accordingly, for example, a traffic jam section detected at a position close to a predetermined value Th or less from the vehicle can be excluded from the target value control target, and the target value control of the battery 30 can be suppressed from being executed for a short time. That is, it can suppress that the notification which shows performing target value control being displayed on the display part 40 only for a short time. Therefore, the possibility that the driver feels uncomfortable with the battery storage state control (SOC control) can be reduced.

  Further, in the hybrid vehicle control device 1, if the target value control has already been executed, the target value control is continuously executed regardless of the distance D from the current position of the vehicle to the tail end of the traffic jam section. In other words, even when a traffic jam section in which the distance D from the vehicle is a predetermined value Th or less is newly detected in a scene where the target value control is already executed, the target value control being executed is not stopped. Also in this respect, it is possible to reduce the possibility that the driver feels uncomfortable with the battery storage state control (SOC control).

[Reference example]
In the above-described embodiment, an example in which target value control for increasing the target value of the battery 30 is applied to a traffic jam section detected on the planned travel route of the vehicle has been described. However, other than this, for example, for a downhill section detected on the planned travel route of the vehicle, the downhill section is not detected until the vehicle reaches the downhill section (or until the downhill section is completed). It is also possible to apply target value control such that the target value of the battery 30 is lower than the time.

  In the above embodiment, in a situation where the target value control is not executed, the target value is immediately detected when a traffic jam section in which the distance D from the current position of the vehicle to the tail of the traffic jam section exceeds a predetermined value Th is detected. The example which performs control was demonstrated. However, as another control method, after the congestion section is detected, execution of target value control may be waited until the distance D approaches a predetermined distance (a value larger than the predetermined value Th).

  The control device for a hybrid vehicle of the present invention suppresses the control for increasing the target value of the battery for the detected traffic jam section from being executed for a short time, and the notification indicating that the control is being executed is short. This is useful when you want to suppress only being displayed.

DESCRIPTION OF SYMBOLS 1 Control apparatus 11 GPS receiving part 12 VICS receiving part 13 Map information database 10 Navigation ECU
20 Hybrid ECU
30 battery 40 display unit

Claims (2)

A control device for controlling a storage state of a battery of a hybrid vehicle,
An acquisition unit for acquiring traffic information related to a current position of the vehicle and a planned travel route of the vehicle;
Based on the traffic information and predetermined map information, a detection unit that detects a traffic jam section where traffic jam occurs on the planned travel route;
Run the storage amount control to approximate the battery storage amount to a predetermined target value, wherein if the congested section is detected, capable of executing the target value control to increase the target value than the previous SL congested section is not detected control comprises a part, the,
The control unit, when the congestion section is detected by the detection unit in a state where the target value control is not executed, a distance from the current position of the vehicle to the tail end of the detected congestion section is a predetermined value or less if the without executing the target value control, currently running the target value control if the distance exceeds the predetermined value until the end of the detected congested section from the position of the vehicle, the control apparatus. The control device according to claim 1, further comprising a display unit that displays that the target value control is being executed only while the control unit is executing the target value control.

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