JP2014048218A - Vehicle display system and display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle display system configured to reduce anxiety of a driver and improve driving flexibility in displaying distance to empty, and to provide a display method.SOLUTION: A vehicle display system 1 calculates an estimated SOC change based on estimated energy consumption to a destination, actual SOC change based on actual energy consumption. The system 1 calculates multiple estimated SOC changes to be obtained when power-saving improvement is implemented, as recovery SOC changes, at least one of when an actual SOC change value in the current place decreases by a predetermined value or more with respect to an estimated SOC change value in the current place, and when the estimated SOC change value in arriving the destination decreases below a predetermined SOC. The system 1 selects at least one of the recovery SOC changes, and displays the estimated SOC change, the actual SOC change, the selected recovery SOC change, and measures for power-saving improvement corresponding to the recovery SOC change.

Description

  The present invention relates to a vehicle display system and a display method.

  2. Description of the Related Art Conventionally, a travelable distance estimation system that estimates a cruising distance from a remaining capacity of a battery such as an electric vehicle has been proposed. In this travelable distance estimation system, the display device displays the route to the destination in black, for example, when the destination can be reached with power consumption of less than 90% of the remaining battery capacity, and more than 90% of the remaining battery capacity. When the destination can be reached with power consumption, the part that can be reached with less than 90% power consumption on the route is displayed in black, and the subsequent routes are displayed in yellow. Further, the travelable distance estimation system displays a route in red for a portion that cannot be reached on the route (see Patent Document 1).

JP 2006-115623 A

  However, the cruising range of the vehicle greatly varies depending on the power consumption state, and the conventional device is anxious to the driver whether it can actually travel to the route displayed in black or yellow. . Furthermore, in the conventional apparatus, when the driver feels uneasy about whether he can reach the destination, the driver will drive so as to improve the power consumption. However, in the conventional device, since it is not known how much to operate with restrictions on self-driving, such as changing the set temperature of the air conditioner or reducing the vehicle speed, the driving is restricted more than necessary, and driving The degree of freedom was limited.

  The present invention has been made in order to solve such a conventional problem, and an object of the present invention is to reduce anxiety given to the driver and display a degree of freedom in traveling when displaying a cruising range. An object of the present invention is to provide a vehicle display system and a display method that can be improved.

  The display system and display method for a vehicle according to the present invention has a value of the expected SOC change when the actual SOC change value at the current location is less than a predetermined value with respect to the value of the predicted SOC change at the current location and when the destination SOC reaches the destination. When at least one of the cases where the power consumption improvement measures are performed when the power consumption is lower than the predetermined SOC, a plurality of calculated SOC changes as recovery SOC changes are selected, and at least one is selected from the plurality of recovery SOC changes, and the predicted SOC changes. An actual SOC change, a recovery SOC change, and a power cost improvement measure corresponding to the recovery SOC change are displayed.

According to the present invention, when the actual SOC change value at the current location is lower than the predetermined SOC value by the predicted SOC change value at the current location, and when the expected SOC change value at the time of arrival at the destination is less than the predetermined SOC. In at least one of the cases, a plurality of predicted SOC changes when the electricity cost improvement measure is implemented are calculated as recovery SOC changes, and at least one is selected from the calculated plurality of recovery SOC changes. Then, the predicted SOC change, the actual SOC change, the recovery SOC change, and the electricity cost improvement measures corresponding to the recovery SOC change are displayed. For this reason, the display of the recovery SOC change or the actual SOC change provides the driver with information such as whether or not the destination can be reached, reduces the anxiety given to the driver, and improves the recovery SOC change and power consumption improvement measures. Is displayed, the driver only needs to implement the electricity cost improvement measures, and does not need to implement other electricity cost improvement measures. As a result, the degree of freedom in traveling is improved. Therefore, it is possible to reduce the anxiety given to the driver when displaying the cruising distance and to improve the degree of freedom of traveling.

It is a schematic structure figure showing the display system for vehicles concerning this embodiment. It is a block diagram which shows the detail of the display system for vehicles shown in FIG. It is a figure which shows the example of a display of the display system 1 for vehicles which concerns on this embodiment. It is a figure which shows the 2nd example of a display of the display system 1 for vehicles which concerns on this embodiment. It is a figure which shows the 3rd example of a display of the display system 1 for vehicles which concerns on this embodiment. It is a 1st flowchart which shows the display method by the display system 1 for vehicles which concerns on this embodiment. It is a 2nd flowchart which shows the display method by the display system 1 for vehicles which concerns on this embodiment. It is a 3rd flowchart which shows the display method by the display system 1 for vehicles which concerns on this embodiment. It is a figure which shows the 4th example of a display of the display system 1 for vehicles which concerns on this embodiment. It is a figure which shows the 5th example of a display of the display system 1 for vehicles which concerns on this embodiment. It is a figure which shows the 6th example of a display of the display system 1 for vehicles which concerns on this embodiment. It is a figure which shows the 7th example of a display of the display system 1 for vehicles which concerns on this embodiment.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a vehicle display system according to the present embodiment. As shown in FIG. 1, the vehicle display system 1 includes a navigation device 10, a vehicle controller 20, a battery device 30, various sensors 40, and various electrical components mounted on, for example, an electric vehicle as shown in FIG. 1. 50 and the information providing apparatus 2 outside the electric vehicle. Each of these units 2, 10 to 50 is connected by CAN (Controller Area Network), other in-vehicle LAN (Local Area Network), and other communication lines, and can exchange information.

  The navigation device 10 guides the route of an electric vehicle, which is its own vehicle, to a destination according to a set route. The navigation device 10 includes a current position detection device 11, a control device (selection means) 12, an input device 13, a communication device 14, a map information storage unit 15, a route search device 16, and a display 17 (display means). ).

The current position detection device 11 is composed of a GPS receiver or the like, and detects current position information of the host vehicle. The control device 12 controls the entire navigation device 10, and in this embodiment, in particular, executes processing for displaying a change in remaining battery capacity (SOC (State of Charge)).

The input device 13 is an interface that can accept user operations such as destination setting and display switching. The communication device 14 enables communication such as ITS and VICS (registered trademark) information with the information providing device 2 via a communication network. The map information storage unit 15 stores map information including information related to altitude, and includes an HDD (Hard Disk Drive) and a DVD.
(Digital Versatile Disc) or the like. The route search device 16 calculates a route search based on the map information stored in the map information storage unit 15 and the section vehicle speed information from the communication device 14. The display 17 displays map information, route search results, distance to the destination, SOC change in the route to the destination, and the like.

  The vehicle controller 20 can receive information such as voltage transmitted from the battery device 30, vehicle speed information calculated from various information transmitted from various sensors 40 and various electrical components 50, and electrical component power consumption information. . Moreover, the vehicle controller 20 can calculate and store information such as the current power consumption calculated based on the above information and the predicted SOC change.

  FIG. 2 is a block diagram showing details of the vehicle display system 1 shown in FIG. 2, details of the navigation device 10 and the vehicle controller 20 shown in FIG. 1 are shown, and the communication device 14 shown in FIG. 1 is not shown.

  As shown in FIG. 2, the vehicle controller 20 includes a battery remaining capacity calculation unit (actual SOC change calculation means) 21, an electrical component power consumption calculation unit 22, a vehicle information storage unit 23, and a power consumption prediction calculation unit (prediction). An SOC change calculation means, a recovery SOC change calculation means) 24 and a battery remaining capacity prediction calculation section (expected SOC change calculation means, recovery SOC change calculation means) 25 are provided.

  The battery remaining capacity calculation unit 21 calculates the SOC from the voltage obtained from the battery device 30 or the like. The battery remaining capacity calculation unit 21 transmits the calculated SOC to the control device 12, and the control device 12 causes the display 17 to display the SOC calculated by the battery remaining capacity calculation unit 21, that is, the actual SOC. The control device 12 may be configured to directly input the SOC calculated by the battery device 30 and display the SOC on the display 17. In this case, the battery device 30 functions as actual SOC change calculation means.

  The electrical component power consumption calculation unit 22 calculates power consumption by various electrical components such as an air conditioning system. The vehicle information storage unit 23 stores the electrical component power consumption calculated by the electrical component power consumption calculation unit 22 and information from the various sensors 40. The vehicle information storage unit 23 stores not only vehicle speed, acceleration / deceleration, and outside air temperature information but also information such as vehicle weight, air resistance coefficient, tire rolling resistance coefficient, and motor / reduction gear efficiency.

  The power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate the predicted SOC change according to the predicted energy consumption to the destination, and the prediction when the power consumption improvement measure is implemented when the predetermined condition is satisfied. A plurality of SOC changes are calculated as recovery SOC changes. First, the expected SOC change will be described.

  Specifically, the power consumption prediction calculation unit 24 calculates each link from the information stored in the vehicle information storage unit 23, the altitude information stored in the map information storage unit 15, and the section vehicle speed information obtained from the information providing device 2. The predicted remaining battery capacity is calculated by subtracting the predicted consumed power amount of each link from the current SOC, so that the battery remaining capacity prediction calculating unit 25 subtracts the predicted remaining battery capacity from the current SOC. That is, the expected SOC change is calculated.

  More specifically, the power consumption prediction calculation unit 24 calculates gradient energy Eh, rolling resistance loss energy Er, air resistance energy Ea, and acceleration resistance energy Eα, and calculates the power consumption of each link from these. To do.

First, the power consumption prediction calculation unit 24 calculates the gradient energy Eh from the following equation (1).
Eh [J] = Mgh (1)
In Equation (1), M is a vehicle weight [kg], g is a gravitational acceleration “m / s ² ”, and h is an altitude difference [m].

In addition, the power consumption prediction calculation unit 24 calculates the rolling resistance loss energy Er from the following equation (2).
Er [J] = μMg × d (2)
Note that μ is a rolling resistance coefficient, and d is a distance [m] of the link section.

Further, the power consumption prediction calculation unit 24 calculates the rolling air resistance energy Ea from the following equation (3).
Ea [J] = 1/2 × ρ × Cd × A × (Vsp / 3.6) 2 × d (3)
Note that ρ is an air density [kg / m ³ ], Cd is an air resistance coefficient, A is a front projection area “M2”, and Vsp is a vehicle speed [km / h].

In addition, the power consumption prediction calculation unit 24 calculates the rolling air resistance energy Ea from the following equation (4).
Eα [J] = Mα × d (4)
Α is the acceleration [m / s ² ].

After calculating each energy by the above formulas (1) to (4), the power consumption prediction calculation unit 24 calculates the travel energy amount Pdwp. Here, when (Eh + Er + Ea + Eα)> 0, the running energy Pd is
Pd [kWh] = (Eh + Er + Ea + Eα) /ηm/ηg/3.6 (5)
Note that ηm is motor efficiency [%], and ηg is gear efficiency [%].

On the other hand, when (Eh + Er + Ea + Eα) <0, the running energy Pd is
Pd [kWh] = (Eh + Er + Ea + Eα) × ηm × ηg / 3.6 (6).

The power consumption prediction calculation unit 24 that has calculated the travel energy Pd as described above further calculates the electrical component consumption energy Eaux.
Eaux [J] = Waux × d / (Vsp / 3.6) (7)
Waux is auxiliary machine power consumption [W].

Thereafter, the power consumption prediction calculation unit 24 predicts the power consumption Pr_all of each link from the following equation (8).
Pr_all [kWh] = Pd + Eaux / 3.6 (8)

  In the example shown in FIG. 2, the acceleration α in Expression (4) uses information stored in the vehicle information storage unit 23, but is not limited thereto, and information from various sensors 40 may be directly obtained. Good. In addition, the past information stored in the vehicle information storage unit 23 may be used for the auxiliary machine power consumption Wux, or may be predicted from the outside air temperature information.

As described above, after the power consumption prediction calculation unit 24 predicts the power consumption Pr_all of each link, the battery remaining capacity prediction calculation unit 25 calculates the battery remaining capacity according to the equation (9).
SOCn = SOCc−Σ (n−1) Pr_all (9)
Note that SOCn is the battery SOC at link n, and SOCc is the battery SOC at the start of travel.

Thereafter, the battery remaining capacity prediction calculation unit 25 transmits the calculated information to the control device 12,
The control device 12 causes the display 17 to display the predicted change in the remaining battery capacity, that is, the predicted SOC change.

  FIG. 3 is a diagram showing a display example of the vehicle display system 1 according to the present embodiment. In the present embodiment, the control device 12 displays the basic image shown in FIG. The basic image has a graph format in which the distance from the departure point to the destination is the horizontal axis and the vertical axis is the SOC. The control device 12 displays the SOC calculated by the battery remaining capacity calculation unit 21 as it is drawn on the graph. At this time, since the control device 12 sequentially displays the SOC every time the vehicle travels in a certain section, the continuous SOC is displayed as an actual SOC change as shown in FIG.

  Furthermore, the control device 12 also displays the predicted SOC change calculated based on the above formulas (1) to (9). Thereby, the display system 1 for vehicles can provide the driver with information on how the actual SOC is with respect to the prediction.

  Furthermore, the vehicle display system 1 according to the present embodiment has a function of displaying a recovery SOC change when a predetermined condition is satisfied. Specifically, the vehicle display system 1 determines that the value of the predicted SOC change at the current location is less than or equal to a predetermined value relative to the value of the predicted SOC change at the current location, and that the expected SOC change value at the time of arrival at the destination is the predetermined SOC. In both cases where the power consumption is lower than the predicted SOC change, a plurality of calculations are performed as the recovery SOC change. In this embodiment, the recovery SOC change is calculated in both of the above two cases. However, the present invention is not limited to this, and the recovery SOC change may be calculated in any one of the cases.

  FIG. 4 is a diagram showing a second display example of the vehicle display system 1 according to the present embodiment. As shown in FIG. 4, for example, when the SOC of the host vehicle is greatly reduced than expected and the value of the actual SOC change at the current location is less than or equal to a predetermined value a with respect to the value of the predicted SOC change at the current location, power consumption prediction is performed. The calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate a plurality of recovery SOC changes. Then, the control device 12 selects at least one of the plurality of recovery SOC changes and displays it on the display 17. FIG. 4 shows an example in which one of a plurality of recovery SOC changes is selected and displayed.

  As shown in FIG. 4, the recovery SOC change indicates the expected SOC change when the electric power cost improvement measure is implemented and the vehicle travels to the destination. By displaying such a change in the recovery SOC, it is possible to provide the driver with information such as whether the destination can be reached, and to reduce the anxiety given to the driver. As for the electricity cost improvement measures, for example, “electricity cost improvement measures: reduction in vehicle speed” is displayed at the lower right of the image, but the display format is not limited to this, and various formats are possible.

  FIG. 5 is a diagram showing a third display example of the vehicle display system 1 according to the present embodiment. Further, as shown in FIG. 5, the recovery SOC change is also calculated when the predicted SOC change value at the time of arrival at the destination falls below a predetermined value c which is a predetermined SOC. Also in this case, similarly to the above, the power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate a plurality of recovery SOC changes. Then, the control device 12 selects at least one of the plurality of recovery SOC changes and displays it on the display 17. FIG. 5 shows an example in which one of a plurality of recovery SOC changes is selected and displayed.

  Also by this, by displaying the recovery SOC change, it is possible to provide the driver with information such as whether the destination can be reached, and to reduce the anxiety given to the driver. In the example shown in FIG. 5 as well, the electricity cost improvement measures are displayed as in FIG.

  Next, details of the calculation of the recovery SOC change will be described. The recovery SOC change is calculated by the power consumption prediction calculation unit 24 by changing and calculating the numerical value so that the power consumption is improved in the above formulas (1) to (9). Hereinafter, three power cost improvement measures, such as changing the air-conditioner set temperature, lowering the vehicle speed, and lowering the vehicle acceleration, will be described as an example. Note that the change in the air conditioner set temperature is an effective power cost improvement measure when the vehicle speed is low and the travel time is long, and the power cost can be improved without changing the destination arrival time. Further, the reduction in the vehicle speed is an effective power cost improvement measure when the vehicle speed is high such as traveling on a highway, and the power cost can be improved by limiting the high speed. Further, the reduction in vehicle acceleration is an effective method in a route with many go-stops such as a city area with many traffic lights and intersections, and the power consumption can be suitably improved by limiting the acceleration.

  First, the case where electricity consumption is improved by changing the air-conditioner set temperature when using the heater will be described. If the air conditioner set temperature is changed (changed so that the load is reduced), the auxiliary machine power consumption Waux of equation (7) is reduced. Assuming that the auxiliary machine power consumption after the decrease is Waux ′ (<Waux), the electrical component energy consumption Eaux ′ after the power cost improvement is Eaux ′ [J] = Waux ′ × d / (Vsp / 3.6), Will be improved. The power consumption prediction calculation unit 24 calculates the electrical component consumption energy Eaux ′ after the power consumption improvement, and the battery remaining capacity prediction calculation unit 25 changes the recovery SOC based on the calculated electrical component consumption energy Eaux ′ after the power consumption improvement. Will be calculated. In the above description, the heater is used, but the same applies to the cooling use.

  Next, a case where power consumption is improved by a decrease in vehicle speed will be described. When the vehicle speed is decreased, the air resistance energy Ea shown in the equation (3) is decreased and the traveling energy Pd is also decreased. On the other hand, since the traveling time becomes longer, the electric component consumption energy Eaux tends to increase. For this reason, in the case where the running energy Pd 'after the vehicle speed is lowered> the electric component consumption energy Eaux "after the vehicle speed is lowered, the electric cost is improved. The power consumption prediction calculation unit 24 substitutes the air resistance energy Ea ′ decreased due to the decrease in the vehicle speed into the equations (5) and (6), and calculates the travel energy Pd ′ after the decrease in the vehicle speed. On the other hand, the power consumption prediction calculation unit 24 calculates the electrical component consumption energy Eaux ″ that increases as the travel time increases based on the equation (7). Then, the battery remaining capacity prediction calculation unit 25 calculates the recovery SOC change based on the calculation result.

  Next, when the vehicle acceleration is decreased, the acceleration resistance energy Eα of the equation (4) is decreased. For this reason, electricity consumption will improve. For this reason, the power consumption prediction calculation unit 24 substitutes the reduced acceleration resistance energy Eα ′ into the equations (5) and (6) to calculate the travel energy Pd ′ after the acceleration decrease. Next, the battery remaining capacity prediction calculation unit 25 calculates the recovery SOC change based on the travel energy Pd ′ after the acceleration decrease.

  As described above, the vehicle display system 1 according to the present embodiment calculates the recovery SOC change. Then, the control device 12 selects at least one of the plurality of calculated recovery SOC changes and causes the display 17 to display the selected recovery SOC change. In addition, in the above, the power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate one recovery SOC change according to one power cost improvement measure, but not limited to this, a plurality of power cost improvement measures are calculated. The recovery SOC change when implemented in combination may be calculated.

Next, a display method by the vehicle display system 1 according to the present embodiment will be described. FIGS. 6-8 is a flowchart which shows the display method by the display system 1 for vehicles which concerns on this embodiment. Note that the flowcharts shown in FIGS. 6 to 8 are executed independently at predetermined intervals.

  First, as shown in FIG. 6, the control device 12 determines whether or not the value of the predicted SOC change at the current location—the value of the actual SOC change at the current location is greater than a predetermined value a (S1). If it is determined that the value is not larger than the predetermined value a (S1: NO), there is no need to display the recovery SOC change, and the process returns to step S1.

  On the other hand, when it is determined that the value of the predicted SOC change at the current location—the value of the actual SOC change at the current location is greater than the predetermined value a (S1: YES), the control device 12 displays the recovery SOC change (S2). Thereafter, the control device 12 determines whether or not the value of the predicted SOC change at the current location—the value of the actual SOC change at the current location is greater than the specified value b (S3). The specified value b is a value smaller than the predetermined value a.

  Value of predicted SOC change at current location-When it is determined that the value of actual SOC change at the current location is greater than the specified value b (S3: NO), it can be said that the recovery of the SOC is achieved to some extent. The display of the recovery SOC change is deleted (S4). Thereafter, the process proceeds to step S1.

  FIG. 9 is a diagram showing a fourth display example of the vehicle display system 1 according to the present embodiment. For example, as shown in FIG. 4, the value of the past actual SOC change is less than the value of the predicted SOC change at that time by a predetermined value a or more, and then the SOC is recovered while the vehicle is traveling toward the destination, It is assumed that the difference between the predicted SOC change value at the current location and the actual SOC change value at the current location is within the specified value b. In this case, in the present embodiment, the control device 12 deletes the display of the recovery SOC change, for example, as in step S4, and displays the predicted SOC change from the current location so as to lead to the actual SOC change. Thereby, it is possible to indicate to the driver that the SOC has been recovered. In the present embodiment, the display of the electricity cost improvement measure is also deleted.

  FIG. 6 will be referred to again. If the value of the predicted SOC change at the current location—the value of the actual SOC change at the current location is determined to be greater than the specified value b (S3: YES), the control device 12 continues to display the recovery SOC change (S5). Thereafter, the control device 12 determines whether or not the destination has been reached (S6). If it is determined that the destination has not been reached (S6: NO), the process proceeds to step S3. If it is determined that the destination has been reached (S6: YES), the processing shown in FIG. 6 ends.

  Moreover, the control apparatus 12 performs the process shown in FIG. 7 in parallel with the process of FIG. As shown in FIG. 7, the power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate a predicted SOC change from the current location (S11). Next, the control device 12 determines whether or not the expected SOC change value when reaching the destination is smaller than a predetermined value c (predetermined SOC) (S12).

  When it is determined that the expected SOC change value at the time of arrival at the destination is not smaller than the predetermined value c (S12: NO), it can be determined that there is some margin in the SOC to reach the destination, so the recovery SOC change is displayed. There is no need to do so, and the process returns to step S1.

  On the other hand, if it is determined that the expected SOC change value when reaching the destination is smaller than the predetermined value c (S12: YES), the control device 12 displays the recovery SOC change (S13). Thereafter, the power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate a predicted SOC change from the current location (S14).

  Next, the control device 12 determines whether or not the expected SOC change value when reaching the destination is larger than a specified value d (specified SOC) (S15). The specified value d is a value larger than the predetermined value c.

  If it is determined that the expected SOC change value when reaching the destination is larger than the specified value d (S15: YES), it can be said that the recovery of the SOC has been realized to some extent, so the control device 12 displays the recovery SOC change display. It erases (S16). Thereafter, the process proceeds to step S11.

  FIG. 10 is a diagram illustrating a fifth display example of the vehicle display system 1 according to the present embodiment. For example, as shown in FIG. 5, when the value of the predicted SOC change when the destination is reached is less than a predetermined value c, and then the vehicle is traveling toward the destination, the SOC is recovered and is lower than the specified value d. Suppose it grows. In this case, in the present embodiment, the control device 12 erases the display of the recovery SOC change, for example, as in step S16, and displays the predicted SOC change from the current location so as to lead to the actual SOC change. Thereby, it is possible to indicate to the driver that the SOC has been recovered. In the present embodiment, the display of the electricity cost improvement measure is also deleted.

  Reference is again made to FIG. If it is determined that the expected SOC change value when reaching the destination is not greater than the specified value d (S15: NO), the control device 12 continues to display the recovery SOC change (S16). Thereafter, the control device 12 determines whether or not the destination has been reached (S17). If it is determined that the destination has not been reached (S17: NO), the process proceeds to step S14. If it is determined that the destination has been reached (S17: YES), the processing shown in FIG. 7 ends.

  Moreover, the control apparatus 12 performs the process shown in FIG. 8 in parallel with the process of FIG.6 and FIG.7. As shown in FIG. 8, the control device 12 determines whether or not to display a recovery SOC change (S21). Specifically, when “YES” is determined in step S1 shown in FIG. 6 and “YES” is determined in step S12 shown in FIG. 7, the control device 12 determines to display the recovery SOC change. (S21: YES). On the other hand, if not, the control device 12 determines not to display the recovery SOC change (S21: NO).

  When it is determined that the recovery SOC change is displayed (S21: YES), the power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 perform the SOC at the destination when the set temperature of the air conditioner is changed as described above. (Hereinafter referred to as destination SOCac) is calculated (S22).

  Next, the power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate the SOC at the destination when the vehicle speed is reduced (hereinafter referred to as the destination SOCv) as described above (S23). Thereafter, the power consumption prediction calculation unit 24 and the battery remaining capacity prediction calculation unit 25 calculate the SOC (hereinafter referred to as the destination SOCa) at the destination when the acceleration is reduced as described above (S24).

  Next, the control device 12 selects the one having the highest SOC at the destination (S25). When the SOCac is the highest (S25: SOCac), the control device 12 causes the display 17 to display the recovery SOC change when the set temperature of the air conditioner is changed (S26). That is, the control device 12 performs display as shown in FIGS. 4 and 5, and then the processing shown in FIG. 8 ends.

Further, when the SOCv is the highest (S25: SOCv), the control device 12 displays the recovery SOC change when the vehicle speed is reduced on the display 17 (S26). That is, the control device 12 performs display as shown in FIGS. 4 and 5, and then the processing shown in FIG. 8 ends.

  Further, when SOCa is the highest (S25: SOCa), control device 12 causes display 17 to display the recovery SOC change when the acceleration is relaxed (S26). That is, the control device 12 performs display as shown in FIGS. 4 and 5, and then the processing shown in FIG. 8 ends.

  In the present embodiment, as shown in FIG. 8, the one having the highest power consumption improvement effect is selected. However, the present invention is not limited to this. For example, a driver selected by the driver may be selected.

  FIG. 11 is a diagram illustrating a sixth display example of the vehicle display system 1 according to the present embodiment. As shown in FIG. 11, when the actual SOC change is less than a predetermined value with respect to the predicted SOC change, and when the expected SOC change at the time of arrival at the destination is below the predetermined SOC, the power consumption prediction calculation unit 24 and the battery The remaining capacity prediction calculation unit 25 calculates a recovery SOC change when the set temperature of the air conditioner is changed, a recovery SOC change when the vehicle speed is reduced, and a recovery SOC change when the acceleration is reduced.

  Then, the control device 12 displays all of these recovery SOC changes. Furthermore, the control device 12 displays an announcement such as “Please select a method for improving power consumption” and causes the driver to select a recovery SOC change via the input device 13. When the selection operation by the driver is completed, the control device 12 selects and displays the recovery SOC change selected by the driver on the display 17 and deletes the display of other recovery SOC changes. Thereby, the electric power cost improvement measure which a driver desires can be implemented, and it can lead to the improvement of driving freedom.

  In the example shown in FIG. 11, it is preferable to clearly display which recovery SOC change corresponds to which power cost improvement measure. This is because the driver can perform the selection operation in association with the electricity cost improvement measure and the recovery SOC change.

  Furthermore, the following display is also possible in the vehicle display system 1 according to the present embodiment. FIG. 12 is a diagram illustrating a seventh display example of the vehicle display system 1 according to the present embodiment. As described above, when the predetermined condition is satisfied, the recovery SOC change is displayed. Furthermore, in the example shown in FIG. 12, the display of the recovery SOC change displayed when the predetermined condition is satisfied is continued. That is, even when the recovery SOC change is displayed and then the vehicle proceeds toward the destination, the recovery SOC change at the start of display is not erased and the display continues.

  Accordingly, the driver can confirm the effect of improving the power consumption by referring to the recovery SOC change at the start of display, and can lead to a sense of security. In the example shown in FIG. 12, the recovery SOC change from the current location is also displayed, but this is displayed in the same manner as the above-described processing.

Thus, according to the vehicle display system 1 and the display method according to the present embodiment, the value of the actual SOC change at the current location is less than the predetermined value relative to the value of the expected SOC change at the current location, and the purpose In at least one of cases where the value of the predicted SOC change at the time of arrival at the ground is lower than the predetermined SOC, a plurality of calculated SOC changes as a recovery SOC change when the electricity cost improvement measure is implemented, and a plurality of calculated recovery SOCs Select at least one from the changes. Then, the predicted SOC change, the actual SOC change, the recovery SOC change, and the electricity cost improvement measures corresponding to the recovery SOC change are displayed. For this reason, the display of the recovery SOC change or the actual SOC change provides the driver with information such as whether or not the destination can be reached, reduces the anxiety given to the driver, and improves the recovery SOC change and power consumption improvement measures. Is displayed, the driver only needs to implement the electricity cost improvement measures, and does not need to implement other electricity cost improvement measures. As a result, the degree of freedom in traveling is improved. Therefore, it is possible to reduce the anxiety given to the driver when displaying the cruising distance and to improve the degree of freedom of traveling.

  In addition, when the actual SOC change value at the current location no longer falls below the specified value with respect to the predicted SOC change value at the current location, the display disappears due to the power consumption improvement effect to erase the recovery SOC change being displayed. On the other hand, it is possible to provide a sense of achievement in improving power consumption and a sense of security of extending the cruising distance, and it is possible to improve the visibility of other displays by erasing.

  In addition, when the expected SOC change value at the time of arrival at the destination becomes larger than the specified SOC, the recovery SOC change being displayed is erased, so the display disappears due to the effect of improving power consumption, and the driver is improved in power consumption. A sense of accomplishment and a sense of security of extending the cruising distance can be provided, and the visibility of other displays can be improved by erasing.

  In addition, since the electricity cost improvement measures include changing the air conditioner set temperature, the electricity cost can be improved without changing the destination arrival time without improving the vehicle speed or the like by changing the air conditioner set temperature. .

  Further, since the electricity cost improvement measures include a decrease in the vehicle speed, the electricity cost can be improved by limiting the high speed, for example, while traveling on a highway.

  Moreover, since the electricity cost improvement measures include a decrease in vehicle acceleration, for example, in a route with many go-stops, such as a city area with many traffic lights or intersections, it is possible to limit the acceleration and appropriately improve the electricity cost. it can.

  In addition, among the calculated multiple recovery SOC changes, the one with the highest power consumption improvement effect is selected, so that the most efficient method can be provided to the driver and only the one with the highest power consumption improvement effect is displayed. Thus, the visibility can be improved.

  In addition, since the recovery SOC change is calculated when a plurality of electricity cost improvement measures are implemented in combination, the recovery SOC change that improves the electricity cost more than one electricity cost improvement measure can be displayed, leading to a further increase in electricity cost. it can.

  Moreover, since the driver | operator's desired electricity cost improvement measure can be implemented in order to select the driver | operator's selection among the calculated several recovery SOC changes, it can lead to the improvement of a driving | running | working freedom degree.

  In addition, even when the recovery SOC change is displayed and the vehicle subsequently travels toward the destination, the driver continues to display the recovery SOC change at the display start time. By referring to the above, the driver can confirm the effect of improving the power consumption and can provide a sense of security.

  In addition, the expected SOC change, actual SOC change, and recovery SOC change are displayed in a graph format in which the horizontal axis is the distance to the destination and the vertical axis is the SOC, so the display is highly visible and highly recognizable to the driver. It can be performed.

As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and modifications may be made without departing from the spirit of the present invention. For example, in this embodiment, the predicted SOC change is displayed in a graph format in which the horizontal axis is the distance to the destination and the vertical axis is the SOC, but the vertical axis and the horizontal axis are not limited to the above, and the vertical axis is Various changes are possible, such as distance and horizontal axis as SOC. Further, the display format is not limited to the graph format, and may be a format in which only numerical values are displayed, or display by another method may be performed.

  In the present embodiment, the predicted SOC change and the recovery SOC change are calculated based on the formulas (1) to (9). However, the present invention is not limited to this, and some of the formulas may be changed or omitted. The following formula may be added.

DESCRIPTION OF SYMBOLS 1 ... Display system 2 for vehicles ... Information provision apparatus 10 ... Navigation apparatus 11 ... Current position detection apparatus 12 ... Control apparatus (selection means)
DESCRIPTION OF SYMBOLS 13 ... Input device 14 ... Communication apparatus 15 ... Map information storage part 16 ... Route search device 17 ... Display (display means)
20 ... Vehicle controller 21 ... Battery remaining capacity calculation section (actual SOC change calculation means)
22 ... Electrical component power consumption calculation unit 23 ... Vehicle information storage unit 24 ... Power consumption prediction calculation unit (expected SOC change calculation means, recovery SOC change calculation means)
25. Battery remaining capacity prediction calculation unit (expected SOC change calculation means, recovery SOC change calculation means)
30 ... Battery device 40 ... Various sensors 50 ... Various electrical components

Claims (12)

A vehicle display system that correlates and displays a distance to a destination on a set route and an SOC change when traveling on the route,
An expected SOC change calculating means for calculating an expected SOC change based on an expected energy consumption to the destination;
An actual SOC change calculating means for calculating an actual SOC change based on actual energy consumption;
When the actual SOC change value at the current location calculated by the actual SOC change calculation unit falls below a predetermined value or more with respect to the predicted SOC change value at the current location calculated by the predicted SOC change calculation unit; A recovery SOC change calculating means for calculating a plurality of predicted SOC changes as recovery SOC changes when power consumption improvement measures are implemented in at least one of cases where the value of the predicted SOC change at the time of arrival is below a predetermined SOC;
Selecting means for selecting at least one of a plurality of recovery SOC changes calculated by the recovery SOC change calculating means;
Expected SOC change calculated by the predicted SOC change calculation means, actual SOC change calculated by the actual SOC change calculation means, recovery SOC change selected by the selection means, and power consumption improvement corresponding to the recovery SOC change Display means for displaying measures,
A vehicle display system comprising: When the actual SOC change value at the current location falls below a predetermined value or more with respect to the predicted SOC change value at the current location, and the recovery SOC change is displayed, the actual SOC change value does not fall below a specified value that is smaller than the predetermined value thereafter. The vehicle display system according to claim 1, wherein the display unit erases the recovery SOC change being displayed. When the expected SOC change value at the time of arrival at the destination is lower than the predetermined SOC and the recovery SOC change is displayed, the value of the expected SOC change at the time of arrival at the destination is larger than the specified SOC larger than the predetermined SOC after that. The display unit for a vehicle according to claim 1, wherein the display unit erases the recovery SOC change being displayed. The vehicle display system according to any one of claims 1 to 3, wherein the electricity cost improvement measure includes a change in air-conditioner set temperature. The vehicle display system according to any one of claims 1 to 4, wherein the electricity cost improvement measure includes a reduction in vehicle speed. The vehicle display system according to any one of claims 1 to 5, wherein the electricity cost improvement measure includes a decrease in vehicle acceleration. The said selection means selects the thing with the highest electricity cost improvement effect among the some recovery SOC change calculated by the said recovery SOC change calculation means. The any one of Claims 1-6 characterized by the above-mentioned. The vehicle display system described in 1. The vehicle display according to any one of claims 1 to 7, wherein the recovery SOC change calculation means calculates a recovery SOC change in a case where a plurality of electricity cost improvement measures are implemented in combination. system. The selecting means includes a plurality of recovery S calculated by the recovery SOC change calculating means.
The vehicle display system according to any one of claims 1 to 6, wherein the OC change is selected by the driver. When the recovery SOC change is displayed and then the vehicle advances toward the destination, the display means continues to display the recovery SOC change at the display start time. The vehicle display system according to claim 9. The display means displays the predicted SOC change, the actual SOC change, and the recovery SOC change in a graph format in which the horizontal axis is the distance to the destination and the vertical axis is the SOC. The vehicle display system according to any one of 10. A display method for a vehicle display system that displays a correlation between a distance to a destination on a set route and a change in SOC when traveling on the route,
An expected SOC change calculating step for calculating an expected SOC change based on an expected energy consumption to the destination;
An actual SOC change calculation step of calculating an actual SOC change based on actual energy consumption;
When the actual SOC change value at the current location calculated in the actual SOC change calculation step is less than a predetermined value with respect to the predicted SOC change value at the current location calculated in the predicted SOC change calculation step; A recovery SOC change calculating step of calculating a plurality of predicted SOC changes as recovery SOC changes when power consumption improvement measures are implemented in at least one of cases where the value of the predicted SOC change at the time of arrival is below a predetermined SOC;
A selection step of selecting at least one of the plurality of recovery SOC changes calculated in the recovery SOC change calculation step;
Expected SOC change calculated in the predicted SOC change calculation step, actual SOC change calculated in the actual SOC change calculation step, recovery SOC change selected in the selection step, and power consumption improvement corresponding to the recovery SOC change A display process for displaying the solution,
A display method for a vehicle display system.

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