JP6361601B2 - 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.

  In order to efficiently recover the regenerative energy, it is preferable to charge the battery with electric power as much as possible while traveling downhill. Therefore, in the conventional control device, for example, when a section having a downward slope is detected on a route on which the vehicle is scheduled to travel, the downhill section is not detected until the downhill section is passed. Control for lowering the target value of the battery storage amount is performed. By such control, the conventional control device or the like can efficiently recover the regenerative energy generated during the downhill traveling to the battery.

JP 2005-160269 A JP 2000-134719 A

  For example, there may be a case where a plurality of traffic jam sections and downhill sections exist in close proximity on a route on which the vehicle is scheduled to travel. In this case, in the above-described conventional control device or the like, after the control to increase or decrease the target value of the battery storage amount executed for the first traffic jam section or the downhill section is completed, the next control is not performed so much. There may be a case in which the control for increasing or decreasing the target value of the battery storage amount for the traffic jam section or the downhill section is started.

The present invention has been made in view of the above problems, it is possible to avoid that the target value control of the battery storage amount is performed discontinuously with short non-execution period, the control apparatus for a hybrid vehicle The purpose is to provide.

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 detector for detecting the target interval Te planned travel route on the odor based on the predetermined map information to perform storage amount control to approximate the battery storage amount to a predetermined target value, when the target section is detected, the eye A control unit capable of executing target value control for raising or lowering the standard value, and when the target section is detected by the detection unit in a state where the target value control is not being executed, before the detection If the elapsed time after the end of the target value control is completed is less than or equal to the predetermined value, the target value control is not executed and the elapsed time after the end of the target value control that ended before the detection exceeds the predetermined value If It runs target value control, characterized in that.

  In the hybrid vehicle control device according to the present invention, the control unit detects the target section before the detection when the detection unit detects the target section without performing the target value control for increasing or decreasing the target value of the battery storage amount. If the elapsed time from the end of control of the target value control that ended is less than or equal to the predetermined value, the control is not executed, and the elapsed time from the end of control of the target value control that ended before detection exceeds the predetermined value If so, the control is executed. That is, if the time equal to or greater than the predetermined value has not elapsed since the end of the target value control that has been executed for a certain target section, the target value control of the battery charge amount is not executed even if the target section is detected. Thereby, when target value control is performed discontinuously, it is possible to prevent the interval between control and control, that is, the period during which target value control is not performed, from being shortened.

As described above, according to the hybrid vehicle control device of the present invention, the target value control for increasing or decreasing the target value of the battery storage amount is prevented from being executed discontinuously with a short non-execution period. it can be.

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 this control device, the control to increase the battery storage amount close to the target value (storage amount control) and the control to increase the target value in preparation for traffic jams detected on the planned travel route of the vehicle or the detection on the planned travel route of the vehicle It is possible to execute control (target value control) for lowering the target value in preparation for the downhill. If the target value control is not executed when a traffic jam or a downhill is detected, the target value control is executed if the elapsed time from the end of the control of the target value control that ended before the detection exceeds a predetermined value. If the elapsed time is less than or equal to a predetermined value, it is not executed. Thereby, when the target value control is executed discontinuously, it is possible to avoid shortening the interval between the controls, that is, the period during which the target value control is not executed. In addition, it is possible to prevent the notification indicating that the target value control is being executed on the display unit or the like from being discontinuously displayed with the non-display for a short time in between. 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, which will be described later, and a function of detecting a traffic jam section and a downhill section, when the CPU reads and interprets and executes the 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, altitudes) and the like 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 and a downhill section having a downward slope. Hereinafter, the traffic jam section and the downhill section are collectively referred to as “target section”. Further, the navigation ECU 10 of the present embodiment further determines the distance from the current position of the vehicle to the tail of the traffic jam section and the vehicle passes through the downhill section based on the information on the current position of the vehicle acquired by the GPS receiver 11. It is comprised so that the distance to may be calculated | required.

  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 is configured such that when the traffic congestion section is detected by the navigation ECU 10, the control of increasing the target value of the battery 30 is possible until the vehicle arrives at the tail end of the detected traffic congestion section. Has been. 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 or the downhill target section is not detected. See FIG. 2 (b). For example, if the target value in the storage amount control executed when the target section is not detected is “50%” of the battery full storage amount, the target value in the storage amount control executed when the traffic congestion section is detected is It is assumed that “60%” of the battery full charge 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 configured such that, when a downhill section is detected by the navigation ECU 10, it is possible to control to lower the target value of the battery 30 until the vehicle passes through the detected downhill section. Has been. Specifically, the hybrid ECU 20 makes the target value when the downhill section is detected lower than the target value when the target section of the traffic jam or the downhill is not detected. See FIG. 2 (c). For example, if the target value in the storage amount control executed when the target section is not detected is “50%” of the battery full storage amount, the target value in the storage amount control executed when the downhill section is detected Is “40%” of the battery full charge amount. Thereby, in the control apparatus 1 of this hybrid vehicle, it is possible to efficiently recover the regenerative energy generated during the downhill travel to the battery 30.

  The above-described control for increasing the target value of the battery 30 according to the detection of the traffic jam section and the control for decreasing the target value of the battery 30 according to the detection of the downhill section are hereinafter referred to as “target value control”.

  Further, the hybrid ECU 20 according to the present embodiment is configured so that the navigation ECU 10 performs the congestion section without executing the target value control based on the information on the target section given from the navigation ECU 10 and the history of the target value control executed so far. Is detected, if the elapsed time from the end of the control of the target value control that ended before the detection is less than or equal to the predetermined value, the target value control is not executed and the control of the target value control that ended before the detection ends If the elapsed time after the time exceeds a predetermined value, the target value control is executed. Thereby, in the control apparatus 1 of this hybrid vehicle, it is prevented that target value control is not performed only for the short time about the detected object 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. FIG. 3 shows an example in which different display is performed when target value control for a traffic jam section is executed and when target value control for a downhill section is executed. It does not matter. 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 S409 are repeatedly executed until a predetermined system termination condition is satisfied (step S410). 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, on the basis of the traffic information and map information acquired in step S401, the navigation ECU 10 determines whether there is a traffic jam section where traffic congestion has occurred on the planned travel route and a downhill section having a downward slope, that is, a target section. Search is performed (step S402). When the search for the target section is completed, the hybrid ECU 20 determines whether target value control is already being executed (step S403).

  If it is determined in step S403 that target value control has already been executed (step S403: Yes), that is, if target value control has been executed for the target 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 target section is not detected in the processing routine up to the previous time, or the target value control for the detected target section is performed. If already completed, the process proceeds to step S404, and it is determined whether or not the target section is detected in the current processing routine. When a plurality of traffic jam sections and downhill sections are detected, any one may be controlled based on a predetermined rule (for example, a section closest to the vehicle).

  If it is determined in step S404 that the target section is not detected (step S404: No), there is no target for which the target value control is to be performed, and the process proceeds to step S410. On the other hand, if it is determined in step S404 that the target section has been detected (step S404: Yes), the process proceeds to step S405 to determine whether target value control should be executed in preparation for the detected target section. Is done.

  When the target section is detected in a situation where the target value control is not executed, the hybrid ECU 20 determines whether or not the elapsed time t after the end of the control of the target value control that ended before the detection is equal to or less than the predetermined value Th. (Step S405). When the elapsed time t is not less than or equal to the predetermined value Th (step S405: No), the hybrid ECU 20 performs target value control for the detected target section (step S406). On the other hand, when the elapsed time t is less than or equal to the predetermined value Th (step S405: Yes), the target value control is not executed (started) for the detected target section. This determination is continued even after the target section is detected, if the target section is not resolved, and execution of target value control is started for the target section when the elapsed time t exceeds a predetermined value Th. (Steps S405 and S407). Note that the event that the target section is canceled is, for example, a case where the traffic information received by the VICS receiving unit 12 is updated and a re-search for a traffic jam section is required, and the vehicle deviates from the guidance route and is rerouted by the navigation ECU 10. An event such as when processing is performed.

  When the target value control is executed for the detected target section in step S406, the condition for the end of the target value control (step S408) is determined. The condition for ending the target value control determined in step S408 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 is stopped. The end of the target value control means returning to the execution of only the storage amount control. When the target value control termination condition is satisfied (step S408: Yes), the target value control that has been executed for the target section by the hybrid ECU 20 is terminated (step S409).

[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 shows a scene in which the target value control is not executed, and the elapsed time t after the end of the control of the target value control in which the target section is newly detected and ended before the detection is the predetermined value Th. It is a figure explaining the case where it exceeds (t> Th).

  As shown in FIG. 5A, when the elapsed time from the end of the target value control executed before the detection is sufficiently long, execution of the target value control is started. In this case, there is a sufficient interval between the display on the display unit 40 informing the execution of the target value control before detection and the display informing the execution of the target value control for the target section detected this time. For this reason, there is a high possibility that the driver will interpret that two consecutive target value controls are executed for different target sections, and the battery storage state control (SOC control) by display → non-display → display It seems that there is no fear of feeling uncomfortable. Therefore, the control device 1 of the hybrid vehicle performs a process of executing the target value control in a scene where the elapsed time t> the predetermined value Th (Step S405 in FIG. 4: No).

  FIG. 5B shows a scene in which the target value control is not executed, and the elapsed time t after the end of the control of the target value control in which the target section is newly detected and ended before the detection is the predetermined value Th. It is a figure explaining the case (t <= Th) below. Such a case is considered to occur in the following case, for example.

  (Case 1) A situation in which a plurality of target sections are detected in proximity. For example, when there is a downhill immediately after a traffic jam, or when two downhills continue with a short flat road in between. In such a situation, in general, target value control is first performed on a target section close to the vehicle among the detected plurality of target sections. Thereafter, when the target value control for this target section is completed, the target value control is immediately executed for the next target section.

  (Case 2) A situation in which the occurrence and elimination of traffic jams are repeated in a short time. In such a situation, the target value control is generally started for the detected traffic jam section. However, the target value control is once terminated when the traffic jam is eliminated. Then, when traffic jam occurs again, target value control is executed.

  (Case 3) A situation in which the travel route is changed during execution of the target value control and a new target section is generated. In such a situation, generally, the target value control that has been executed before the route change is temporarily ended by the reroute processing. When the target section is detected on the new route, target value control is executed for the new target section.

  As shown in FIG. 5 (b1), when the elapsed time from the end of the control of the target value control that ended before the detection is short, the execution of the target value control is not started. In this case, the display unit 40 does not have a sufficient interval between the display notifying execution of target value control before detection and the display notifying execution of target value control for the target section detected this time. For this reason, there is a high possibility that the driver will wonder why it is hidden for a moment while executing the target value control, and the battery storage state control (SOC control) by display → short-time non-display → display ) May be uncomfortable. Therefore, the control device 1 of the hybrid vehicle performs a process of not executing the target value control in a scene where the elapsed time t ≦ predetermined value Th (step S405 in FIG. 4: Yes).

  Then, as shown in FIG. 5 (b2), there is still a target section detected this time when the elapsed time t after the end of the control of the target value control that ended before the detection exceeds a predetermined value Th. If so, target value control is executed.

[Effect of the embodiment]
As described above, in the hybrid vehicle control device 1 according to an embodiment of the present invention, detection is performed when a traffic jam section or a downhill section is detected on the planned travel route of the vehicle in a state where target value control is not performed. If the elapsed time t after the end of the control of the target value control that ended before is less than or equal to the predetermined value Th, the target value control of the battery 30 is not executed. Thereby, when target value control is performed discontinuously, it is possible to prevent the interval between control and control, that is, the period during which target value control is not performed, from being shortened. In other words, the target value control is prevented from being discontinuously executed with a short non-execution period, and the notification indicating that the target value control is being executed is discontinuous with a short time non-display in between. Can be prevented from being displayed on the display unit 40. Therefore, the possibility that the driver feels uncomfortable with the battery storage state control (SOC control) can be reduced.

[Reference example]
In the above embodiment, an example has been described in which whether or not to execute target value control is determined based on an elapsed time t after the end of control of target value control that has ended before detecting a new target section. However, as another control method, whether or not to execute target value control is determined based on the distance traveled by the vehicle from the point where control of target value control that ended before detecting a new target section is completed. You can go.

  The control apparatus for a hybrid vehicle according to the present invention prevents the target value control of the battery storage amount from being executed discontinuously across a short non-execution period, so that the driver can control the battery storage state control (SOC control). This is useful when you want to prevent discontinuous display that makes you feel uncomfortable.

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 (4)

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 detector for detecting a Target interval Te the planned travel route on the smell,
Run the storage amount control to approximate the battery storage amount to a predetermined target value, wherein if the target section is detected, includes pre-SL and the control unit capable of executing the target value control to increase or decrease the target value, and
When the target section is detected by the detection unit in a state where the target value control is not executed, the control unit has a predetermined elapsed time from the end of the control of the target value control that ended before the detection. wherein without executing the target value control if the value or less, you run the target value control if the elapsed time exceeds the predetermined value after the control end of said target value control which have terminated before the relevant detection ,Control device. The target section is a traffic congestion section where traffic congestion has occurred,
2. The control device according to claim 1, wherein when the traffic jam section is detected, the control unit executes target value control for increasing the target value as compared with a case where the traffic jam section is not detected. The target section is a downhill section having a downward slope,
3. The control device according to claim 1, wherein when the downhill section is detected, the control unit executes target value control that makes the target value lower than when the downhill section is not detected. . 4. The display unit 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. 5. Control device.