Control device and display device

Abstract

To achieve both of accomplishment of a driving schedule and improvement of energy consumption reduction effect.SOLUTION: A control device allows a display device to display information related to a vehicle during traveling. The control device performs: generating a time image which indicates whether an estimation arrival time estimated based on a vehicle speed of the vehicle and navigation information as information related to a schedule time for an arrival at a destination is shortened or prolonged with respect to an initial arrival schedule time fixed by the navigation information when the traveling is started during the traveling of the vehicle to the destination set in the navigation information; generating an effect image which indicates an energy consumption reduction effect to be obtained in the vehicle depending on a present traveling state of the vehicle; and allowing the display device to display the generated time image and the generated effect image in real time.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a control device and a display device.

Background Art

[0002] Patent Document 1 discloses a platoon running system that forms a platoon in which a vehicle with excellent straight-ahead performance is placed at the head in consideration of the straight-ahead performance of each vehicle when a plurality of vehicles running in automatic driving wish to run in a platoon.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, like the effects obtained by implementing the platoon running described in Patent Document 1, there is a desire to run without delay from the driving plan while enjoying the effect of reducing energy consumption obtained by running the vehicle in an efficient driving state.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a control device and a display device capable of achieving both the achievement of a driving plan and the improvement of the effect of reducing energy consumption.

Means for Solving the Problems

[0006] The control device according to the present invention is a control device comprising a control unit that performs display control to display information relating to a vehicle in motion on a display device, wherein, while the vehicle is traveling toward a destination set in navigation information, the control unit generates a time image showing whether the estimated arrival time, estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated arrival time determined by the navigation information at the start of travel, as information relating to the scheduled time of arrival at the destination, generates an effect image showing the effect of reducing energy consumption obtained by the vehicle based on the vehicle's current driving state, and displays the generated time image and the effect image on the display device in real time.

[0007] In this configuration, a time image showing time information relative to the expected scheduled time and an effect image showing the effect of reducing energy consumption are displayed in real time on the display device. As a result, the driver who sees this image display can determine what kind of driving is necessary to balance time and fuel efficiency. Therefore, it is possible to achieve both the achievement of the driving plan and the improvement of the effect of reducing energy consumption.

[0008] Furthermore, the control unit may include an effect calculation unit that calculates the energy consumption reduction effect obtained by the vehicles when the vehicles are driving in a convoy, and a time calculation unit that calculates the difference between the initial scheduled arrival time and the estimated arrival time, and the control unit may generate the effect image based on the energy consumption reduction effect by the convoy calculated by the effect calculation unit, and generate the time image based on the difference calculated by the time calculation unit.

[0009] This configuration allows for reduced energy consumption through platooning while minimizing delays from the planned route.

[0010] Furthermore, the control unit may include an effect calculation unit that calculates the energy consumption reduction effect obtained by the vehicle due to the speed limit when the vehicle is traveling under speed limit conditions, and a time calculation unit that calculates the difference between the initial scheduled arrival time and the estimated arrival time, wherein the control unit generates the effect image based on the energy consumption reduction effect due to the speed limit calculated by the effect calculation unit, and generates the time image based on the difference calculated by the time calculation unit.

[0011] This configuration allows for the reduction in energy consumption due to speed limits while preventing delays from the planned driving schedule.

[0012] Furthermore, the control unit may include an effect calculation unit that calculates the energy reduction effect obtained by the vehicle when it is running in a control state that allows it to pass through traffic signals with the signal light always in a green state, and a time calculation unit that calculates the difference between the initial scheduled arrival time and the estimated arrival time, wherein the control unit generates the effect image based on the energy reduction effect due to the running state calculated by the effect calculation unit, and generates the time image based on the difference calculated by the time calculation unit.

[0013] This configuration allows us to enjoy the energy consumption reduction effect of the so-called "blue wave" while suppressing delays from the travel plan.

[0014] Furthermore, the control unit may set the time specified by the occupants of the vehicles as the target arrival time, and while the vehicles are driving in a convoy, it may generate a success / failure image showing whether the target has been achieved by comparing the estimated arrival time, which takes into account the delay in arrival time to the destination due to the convoy driving, with the target arrival time, and display the generated success / failure image on the display device in real time.

[0015] This configuration allows for the visualization of whether or not the target arrival time during platooning is achieved, based on the target arrival time set from the driver's perspective.

[0016] The present invention relates to a display device that displays information relating to a vehicle in motion, wherein, while the vehicle is traveling toward a destination set in navigation information, it displays in real time a time image showing information relating to the estimated time of arrival at the destination and an effect image showing the effect of reducing energy consumption, wherein the time image is an image showing whether the estimated time of arrival, estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated time of arrival determined by the navigation information at the start of travel, and the effect image is an image showing the effect of reducing energy consumption obtained by the vehicle based on the current driving state of the vehicle.

[0017] This configuration allows for the real-time display of a time image showing time information relative to the expected scheduled time, and an effect image showing the effect of reducing energy consumption. This enables drivers to determine what kind of driving is necessary to balance time and fuel efficiency. Therefore, it is possible to achieve both the goal of the driving plan and an improvement in the effect of reducing energy consumption.

[0018] Furthermore, when the vehicles are driving in a convoy, an effect image corresponding to the energy reduction effect obtained by the vehicles through convoy driving, and a time image corresponding to the difference between the initial scheduled arrival time and the estimated arrival time may be displayed in real time.

[0019] This configuration allows for reduced energy consumption through platooning while minimizing delays from the planned route.

[0020] Furthermore, when the vehicle is traveling under speed restrictions, the effect image corresponding to the energy reduction effect obtained by the vehicle due to the speed restriction, and the time image corresponding to the difference between the initial scheduled arrival time and the estimated arrival time may be displayed in real time.

[0021] This configuration allows for the reduction in energy consumption due to speed limits while preventing delays from the planned driving schedule.

[0022] Also, when the vehicle is always running in a control state where it can pass through a traffic signal with a blue light color, the effect image corresponding to the energy consumption reduction effect obtained by the vehicle due to this control state and the time image corresponding to the difference between the original arrival scheduled time and the estimated arrival time may be displayed in real time.

[0023] According to this configuration, it is possible to suppress being delayed from the driving plan while enjoying the energy consumption reduction effect by the so-called blue wave.

[0024] Also, when the vehicle is performing platoon driving, a pass / fail image indicating the result of whether the target has been achieved by comparing the estimated arrival time taking into account the delay in the arrival time at the destination due to platoon driving with respect to a preset target arrival time is displayed. The target arrival time may be set to the time designated by the vehicle occupants.

[0025] According to this configuration, it is possible to visualize whether the target has been achieved during platoon driving based on the target arrival time set from the driver's perspective.

Advantages of the Invention

[0026] In the present invention, a time image indicating time information with respect to the assumed scheduled time and an effect image indicating the energy consumption reduction effect are displayed on a display device in real time. As a result, for the driver who sees this image display, it is possible to determine what kind of driving should be performed in order to achieve both time and fuel efficiency. Therefore, it is possible to achieve both the achievement of the driving plan and the improvement of the energy consumption reduction effect.

Brief Description of the Drawings

[0027] [Figure 1] FIG. 1 is a block diagram schematically showing a vehicle in the first embodiment. [Figure 2] FIG. 2 is a flowchart showing a display control flow. [Figure 3]Figure 3 shows a first display example in which the time image and effect image are displayed in real time. [Figure 4] Figure 4 shows a second display example in which the time image and effect image are displayed in real time. [Figure 5] Figure 5 shows the first modified example of the image display. [Figure 6] Figure 6 shows a second modified example of the image display. [Figure 7] Figure 7 is a diagram illustrating the control device in the second embodiment. [Figure 8] Figure 8 is a diagram illustrating the control device in the third embodiment. [Figure 9] Figure 9 is a diagram illustrating the driving state in the third embodiment. [Modes for carrying out the invention]

[0028] The control device and display device in embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below.

[0029] (First Embodiment) Figure 1 is a schematic block diagram showing a vehicle in the first embodiment. In the first embodiment, when vehicle 1 is driving in a convoy, it is configured to provide the driver with information about vehicle 1 while it is in motion. It is configured to make the information about vehicle 1 visible. Vehicle 1 is equipped with a system (automatic follow system) that allows it to follow a vehicle driving ahead of it, such as radar cruise control, auto cruise control, or adaptive cruise control.

[0030] Vehicle 1 is equipped with a control device 11 and a display device 12.

[0031] The control device 11 is comprised of an electronic control unit that controls the vehicle 1. This electronic control unit includes a CPU, RAM, ROM, and a microcontroller equipped with an input / output interface. The control device 11 performs signal processing according to a program pre-stored in the ROM. The control device 11 also receives signals from various sensors mounted on the vehicle 1. The vehicle 1 is equipped with a preceding vehicle detection sensor 13 and a vehicle speed sensor 14 as on-board sensors.

[0032] The preceding vehicle detection sensor 13 is a sensor that detects a preceding vehicle, which is a vehicle traveling in front of vehicle 1. This preceding vehicle detection sensor 13 is composed of, for example, a front camera and a millimeter-wave radar. In the first embodiment, the preceding vehicle detection sensor 13 is composed of a front camera and a millimeter-wave radar. Therefore, the preceding vehicle detection sensor 13 outputs preceding vehicle information, including the image from the front camera and the measurement results from the millimeter-wave radar, to the control device 11.

[0033] The vehicle speed sensor 14 detects the vehicle speed of vehicle 1 from a pulse signal corresponding to the rotation speed of the axle.

[0034] The signals output from the preceding vehicle detection sensor 13 and the vehicle speed sensor 14 are then input to the control device 11. The control device 11 uses the preceding vehicle information input from the preceding vehicle detection sensor 13 to detect the vehicle that the vehicle will follow (the preceding vehicle). Since the preceding vehicle information includes an image of the area in front of the vehicle and measurement results from the radar, the control device 11 can detect the preceding vehicle based on the image of the area in front of the vehicle and the measurement results from the millimeter-wave radar.

[0035] Furthermore, the control device 11 performs display control to display information about the vehicles 1 during platooning based on signals input from various sensors. This control device 11 includes a control unit that performs the display control. When the control device 11 performs the display control, it generates an effect image B corresponding to the energy reduction effect of platooning, and displays the effect image B on the display device 12.

[0036] More specifically, the control device 11 comprises an effect calculation unit 11a, a maximum value setting unit 11b, a time calculation unit 11c, and an image generation unit 11d.

[0037] The effect calculation unit 11a calculates the energy consumption reduction effect obtained by vehicle 1 when platooning is performed. This effect calculation unit 11a calculates the energy consumption reduction effect obtained when vehicle 1 follows a preceding vehicle detected by the preceding vehicle detection sensor 13 (platooning).

[0038] This effect calculation unit 11a calculates the effect of reducing air resistance due to platooning as an effect of reducing energy consumption. The air resistance experienced by vehicle 1 while driving is determined by multiplying the frontal projected area of ​​vehicle 1, the air resistance coefficient, and the pressure. Furthermore, the effect of reducing air resistance obtained by platooning can be calculated based on the size of the preceding vehicle, the distance between vehicle 1 and the preceding vehicle (inter-vehicle distance), and the vehicle speed. In this case, the size of the preceding vehicle and the inter-vehicle distance can be calculated based on the preceding vehicle information acquired by the preceding vehicle detection sensor 13.

[0039] For example, the effect calculation unit 11a analyzes the image of the area in front of the vehicle acquired by the forward camera included in the preceding vehicle detection sensor 13 to calculate the size of the preceding vehicle and the distance between vehicle 1 and the preceding vehicle. Alternatively, the effect calculation unit 11a calculates the distance between vehicle 1 and the preceding vehicle based on the radar measurement results acquired by the millimeter-wave radar included in the preceding vehicle detection sensor 13. Vehicle speed can be detected by the vehicle speed sensor 14. The effect calculation unit 11a then calculates the air resistance reduction effect based on the size of the preceding vehicle, the distance between vehicles, and the vehicle speed. As an example, the air resistance reduction effect is greater when the distance between vehicles is short, and smaller when the distance between vehicles is long.

[0040] The maximum value setting unit 11b sets a provisional maximum value that indicates a state in which a sufficient reduction in energy consumption has been obtained. The provisional maximum value can be set to, for example, "20%". If vehicle 1 is not performing platooning, the energy consumption reduction effect due to platooning is not obtained, so the effect can be expressed as a percentage, such as "0%". On the other hand, if vehicle 1 is performing platooning, the energy consumption reduction effect due to platooning is obtained, so the obtained reduction effect can be expressed as a positive value, such as "15%".

[0041] The maximum value setting unit 11b then sets a value smaller than "100%" as the provisional maximum value. This is to prevent the driver from pursuing excessive energy reduction. If "100%" were set as the maximum value and the energy reduction effect was displayed on the display device 12, even if the energy reduction effect was at "20%", which is a sufficient level, the driver would still see "80% remaining" from the maximum value of "100%". This could lead the driver to seek even greater fuel efficiency improvements. To prevent this, the control device 11 sets a provisional maximum value. In other words, the control device 11 implements various controls to achieve both the achievement of the driving plan and the improvement of fuel efficiency.

[0042] The time calculation unit 11c calculates the estimated time of arrival at the destination. The control device 11 can acquire navigation information from the car navigation device 15. For example, if the driver of vehicle 1 sets a destination by operating the car navigation device 15, the control device 11 receives the destination information set by the car navigation device 15 as navigation information. The control device 11 also receives the positioning signal received by the GPS receiver 16. The control device 11 can acquire the location information of vehicle 1 from the GPS receiver 16. Then, while vehicle 1 is traveling toward the destination, the time calculation unit 11c estimates (calculates) the estimated time of arrival at the destination based on the current driving status, and calculates the difference between the estimated time of arrival and the initial estimated time of arrival set at the start of the journey. In other words, the control device 11 estimates the estimated time of arrival at the destination using information indicating the current driving status and navigation information while vehicle 1 is traveling in a convoy.

[0043] The initial estimated arrival time may be the time set by the driver of vehicle 1 using the car navigation system 15, or it may be a time calculated by the time calculation unit 11c (calculated value). In the case of a calculated value, the time calculation unit 11c can calculate the estimated arrival time based on the location information of vehicle 1 at the start of travel, destination information from navigation information, and information on the planned travel route. This calculated estimated arrival time is used as the assumed arrival time (initial estimated arrival time) that serves as the basis for the driving plan and is used for control by the control device 11.

[0044] The estimated arrival time during travel is calculated based on the location information of vehicle 1, the vehicle speed information of vehicle 1, the destination information, and the planned travel route information. The vehicle speed information uses either the current vehicle speed, the most recent vehicle speed, or the average vehicle speed over several minutes. The time calculation unit 11c calculates the estimated arrival time based on the current travel information while vehicle 1 is traveling in a convoy. This calculated estimated arrival time is used by the control device 11 as the estimated arrival time estimated when the current travel conditions are continued in accordance with the travel plan.

[0045] Furthermore, while the vehicles 1 are traveling in a convoy, the control device 11 can determine whether the estimated arrival time (estimated arrival time) based on the current driving conditions has become earlier or later than the initial estimated arrival time (expected arrival time) assumed at the start of the journey. In other words, by calculating the difference between the estimated arrival time and the expected arrival time during convoy travel, the control device 11 can determine whether the required time has been "shortened" or "extended" compared to the initially assumed required time.

[0046] The image generation unit 11d generates an image showing information about vehicle 1. The image generation unit 11d generates the image according to the results calculated by the effect calculation unit 11a and the time calculation unit 11c, and the provisional maximum value set by the maximum value setting unit 11b. The image data generated by the image generation unit 11d is then output to the display device 12.

[0047] The display device 12 displays information about vehicle 1 during platooning. This display device 12 is located inside the vehicle 1 and is a display that shows images in a position visible to the driver of vehicle 1. For example, the display device 12 is composed of a multi-information display or a head-up display. The display device 12 is controlled by the control device 11 and displays images in response to signals input from the control device 11.

[0048] Figure 2 is a flowchart illustrating the display control flow. The control shown in Figure 2 is repeatedly performed by the control device 11 while vehicle 1 is traveling in a convoy.

[0049] The control device 11 calculates the estimated time of arrival at the destination if the vehicle 1 continues its current driving state while traveling in a convoy (step S101). In step S101, the estimated arrival time is calculated (estimated). The processing in step S101 is performed by the time calculation unit 11c.

[0050] The control device 11 calculates the difference between the assumed arrival time at the start of travel and the estimated arrival time according to the current travel status (step S102). In step S102, the difference time between the assumed arrival time and the estimated arrival time is calculated. The processing in step S102 is performed by the time calculation unit 11c.

[0051] Then, the control device 11 generates an image showing the difference between the estimated arrival time and the assumed arrival time (step S103). In step S103, based on the calculation results in step S102, a time image A is generated that shows whether the expected arrival time at the destination is shorter or longer than the reference value.

[0052] For example, if the estimated arrival time is earlier than the expected arrival time, a time image A indicating "shortening" is generated in step S103. Also, if the estimated arrival time is later than the expected arrival time, a time image A indicating "extension" is generated in step S103. The processing in step S103 is performed by the video generation unit 11d.

[0053] Furthermore, the control device 11 calculates the current platooning effect (step S104). In step S104, when vehicle 1 is driving in a platoon, the energy reduction effect obtained by vehicle 1 through platooning is calculated. The processing in step S104 is performed by the effect calculation unit 11a.

[0054] The control device 11 generates an image showing the current convoy effect relative to a provisional maximum value (step S105). In step S105, an effect image B is generated that shows the reduction effect of the current energy consumption relative to a preset provisional maximum value. This effect image B is generated as an image in which information regarding the energy consumption reduction effect is represented by meters. The provisional maximum value is a value determined by the maximum value setting unit 11b, and is a value that indicates a state in which a sufficient energy consumption reduction effect can be obtained.

[0055] The control device 11 then displays both the difference time relative to the expected arrival time and the current estimated convoy effect in real time (step S106). In step S106, an image showing the difference time between the expected arrival time and the estimated arrival time, and an image showing the reduction effect of the current energy consumption relative to the provisional maximum value are displayed in real time on the display device 12. At this time, image data is output from the control device 11 to the display device 12. On the display device 12, the time image A is displayed on a meter as "shortened" or "extended," and the effect image B is displayed on a meter within a range between the provisional maximum value and 0%. In addition, as each image is displayed in real time, the meter showing the difference time and the meter showing the reduction effect change in real time. After the processing in step S106 is completed, this control routine ends.

[0056] Vehicle 1, configured in this way, can acquire information regarding the relative position between Vehicle 1 and the preceding vehicle using autonomous sensors such as millimeter-wave radar. The display device 12 then displays a time image A related to the arrival time next to the effect image B of platooning, as shown in Figures 3 and 4, for example.

[0057] As shown in Figure 3, if the estimated arrival time is later than the expected arrival time, and the energy reduction effect of platooning is significant, the time image A displays a meter that extends beyond the baseline value, and the effect image B displays a meter that has reached the provisional maximum value of "20%". In addition, time image A displays the reduction and extension of time with "X" minutes as the upper limit. This X minutes is a value set by the control device 11. For example, the car navigation device 15 can set "X minutes" to any value such as "20 minutes" or "30 minutes". If "X" is set to "20", the display device 12 will display images such as "20 [minutes] reduction" and "20 [minutes] extension".

[0058] As shown in Figure 4, if the estimated arrival time is earlier than the expected arrival time, and the energy reduction effect of platooning is small, the time image A will show a meter that extends beyond the baseline value towards the "shorter" side, and the effect image B will show a meter with a value smaller than the provisional maximum value.

[0059] In this way, by displaying images that show both the reduction or extension of the estimated arrival time and the energy reduction effect obtained by platooning, drivers who view these images can determine what kind of driving is necessary to balance time and fuel efficiency.

[0060] As explained above, the system can display images showing the current time difference from the driving plan, and can also display an image of the time difference relative to the driving plan, indicating whether the current driving conditions are eco-friendly. This allows the driver to make decisions about changing their driving conditions. This makes it possible to achieve both the achievement of the driving plan and the improvement of fuel efficiency.

[0061] For example, when traveling in vehicle 1 to attend an event held far away, if the driving plan is to depart with enough time to arrive by 11:00 AM, by departing with ample time and effectively utilizing the platooning mode, it is possible to drive on the highway with a high energy reduction effect. In other words, on the highway, it is possible to find an effective lead vehicle in platooning mode and follow that vehicle in a platoon. However, if the vehicle speed decreases due to platooning, although the energy reduction effect of platooning can be greatly enjoyed, there is a possibility of being late for the originally planned arrival time. Therefore, the driver can use the time image A and effect image B displayed on the display device 12 as a basis for judgment and change to a driving state that aims to shorten the time by increasing the speed, even if it means reducing the energy reduction effect of platooning. As a result, the driver was able to arrive at the destination in time for the planned 11:00 AM. Thus, using the image information displayed on the display device 12 as a basis for judgment during platooning is effective.

[0062] The power source for vehicle 1 is not particularly limited. For example, if vehicle 1 is an electric vehicle equipped with a motor as its power source, the motor can be driven by supplying electricity stored in the battery to the motor, allowing the vehicle to move. Since vehicle 1 moves using power obtained by consuming electricity, if it is in an energy-efficient driving state, the electricity consumption will improve and the driving range can be extended. In this case, the effect calculation unit 11a will calculate the effect of reducing power consumption during platooning (electricity consumption improvement effect). Also, for example, if vehicle 1 is a vehicle equipped with an engine, the effect calculation unit 11a will calculate the effect of reducing fuel consumed during platooning (fuel efficiency improvement effect).

[0063] Furthermore, the display device 12 may be a car navigation system 15. In short, the display device 12 is configured using an HMI (Human Machine Interface). That is, the display device 12 may be a device mounted on the vehicle 1, or it may be a mobile device brought into the vehicle 1 by the driver, such as a smartphone. If the display device 12 is a smartphone, the control device 11 is configured to communicate with the smartphone, and image data transmitted from the control device 11 is displayed on the smartphone's screen.

[0064] Furthermore, the time image A and effect image B displayed in real time on the display device 12 are not limited to the display examples shown in Figures 3 and 4. For example, the minimum and maximum values ​​of effect image B are not limited to a combination of "0%" and "20%", but can be set to any value. In short, the upper and lower limits of the meter for time image A and the upper and lower limits of effect image B are not particularly limited.

[0065] As an example, an image can be displayed on the display device 12 using the display method shown in Figures 5 and 6. In this display method, effect image B is displayed with a provisional maximum value of "20%" and a provisional minimum value of "-20%".

[0066] As shown in Figure 5, if the estimated arrival time is later than the expected arrival time, and the energy reduction effect of platooning is significant, the time image A will show a meter that extends beyond the baseline value, and the effect image B will show a meter that extends towards the positive value. This positive value represents a state where energy consumption has been reduced.

[0067] As shown in Figure 6, if the estimated arrival time is earlier than the expected arrival time, and the energy reduction effect of platooning is small, the time image A will show a meter extending towards the "shorter" side of the baseline, and the effect image B will show a meter extending towards the "negative value" side. This negative value represents a state where energy consumption has increased.

[0068] Furthermore, the control device 11 can set the time specified by the occupants of vehicle 1 as the target arrival time, and when vehicle 1 is driving in a convoy, it can display information on the display device 12 indicating whether or not it is possible to reach the destination by the target arrival time.

[0069] For example, if the driver of vehicle 1 operates an HMI such as a car navigation system 15 to specify a target arrival time, the control device 11 sets the specified time as the target arrival time based on that input information. The time calculation unit 11c calculates an estimated arrival time that takes into account the delay in arrival time to the destination due to platooning. Then, while vehicle 1 is platooning, the control device 11 compares the estimated arrival time calculated by the time calculation unit 11c with the preset target arrival time to determine whether the target has been achieved. If the estimated arrival time is earlier than the target arrival time, the result is that the target has been achieved; if the estimated arrival time is later than the target arrival time, the result is that the target has not been achieved. Furthermore, the control device 11 generates an image (approval / disapproval image) indicating whether the target has been achieved (approval / disapproval image) according to the determination result and displays it on the display device 12. In other words, the control device 11 generates an approval / disapproval image that shows whether the target has been achieved by comparing the estimated arrival time, which takes into account the delay in arrival time to the destination due to platooning, with the target arrival time during platooning. The control device 11 then displays the generated pass / fail image on the display device 12 in real time. In this case, the control device 11 can display the pass / fail image on the display device 12 instead of the time image A. The display device 12 can display the pass / fail image in real time instead of the time image A when the vehicles 1 are traveling in a convoy. This allows the driver of vehicle 1 to visualize whether or not they will arrive at the target arrival time they have specified. Because the display device 12 displays an image showing whether or not the target has been achieved, the driver does not need to operate the HMI during convoy travel to check whether or not they will arrive at the target arrival time, thus reducing the burden on the driver.

[0070] Furthermore, the control device 11 only needs to be configured to display at least one of the time image A and the pass / fail image on the display device 12, and it is also possible to display both the time image A and the pass / fail image on the display device 12. The same applies to the display device 12.

[0071] (Second Embodiment) In the second embodiment, unlike the first embodiment, the system is configured to ensure that the vehicle 1 does not fall behind the driving plan while enjoying the energy consumption reduction effect of speed control, assuming that the vehicle 1 is traveling under speed-restricted conditions. In the description of the second embodiment, the same components as in the first embodiment will not be described and their reference numerals will be used by reference.

[0072] In the second embodiment, when the control device 11 performs display control, an input signal from the preceding vehicle detection sensor 13 is not required. Furthermore, the control device 11 can perform speed limit control to restrict the vehicle speed of vehicle 1 to a predetermined upper limit. While performing speed limit control, the control device 11 calculates the energy consumption reduction effect according to the current vehicle speed based on the input signal from the vehicle speed sensor 14.

[0073] The effect calculation unit 11a calculates the energy consumption reduction effect according to the vehicle speed, based on the signal input from the vehicle speed sensor 14, while the vehicle 1 is traveling with the vehicle speed limited to a predetermined upper limit (vehicle speed limited state). When calculating the energy consumption reduction effect due to the vehicle speed limit, the effect calculation unit 11a calculates the effect such that the energy consumption reduction effect becomes smaller as the vehicle speed approaches the upper limit.

[0074] As shown in Figure 7, the relationship between vehicle speed and driving range is such that the driving range decreases as the vehicle speed increases. Therefore, the control device 11 can determine the driving range for each vehicle speed using the map shown in Figure 7 and the current vehicle speed of vehicle 1.

[0075] Furthermore, Figure 7 illustrates a case where Vehicle 1 is an electric vehicle powered by a motor and has a battery capacity of 30 kWh. In this case, the effect of reducing energy consumption translates to an improvement in electric fuel efficiency. That is, since there is a limit to the amount of electricity stored in the battery, driving conditions that allow for a longer driving range and thus a longer driving time are driving conditions that result in a high improvement in electric fuel efficiency.

[0076] In the example shown in Figure 7, the relationship between driving range and vehicle speed is such that the driving range increases with increasing vehicle speed up to around 30 km / h, peaking at around 30 km / h, and then decreasing as the vehicle speed increases further. From the perspective of driving range, the effect of improving energy efficiency decreases with increasing vehicle speed in the speed range above 30 km / h.

[0077] As shown in Figure 7, the relationship between driving time and vehicle speed is such that driving time decreases as vehicle speed increases. From the perspective of driving time, the effect of improving energy efficiency decreases with increasing vehicle speed across the entire speed range.

[0078] In this manner, the control device 11 calculates the energy consumption reduction effect based on the vehicle speed while driving under a vehicle speed limit, generates an effect image B corresponding to the result, and performs display control to display it on the display device 12. In the second embodiment as well, it is possible to display the time image A and the effect image B adjacent to each other using the display method shown in Figures 3 to 6.

[0079] As explained above, according to the second embodiment, it becomes possible to achieve the driving plan while enjoying the effect of reducing energy consumption by limiting vehicle speed.

[0080] In the second embodiment, the case where vehicle 1 is an electric vehicle was described, but the invention is not limited to this. Vehicle 1 may also be a vehicle powered by an engine. In other words, the effect of reducing energy consumption only needs to be at least one of the effects of improving fuel efficiency and improving electric power consumption.

[0081] (Third embodiment) In the third embodiment, unlike the first embodiment, information regarding traffic signals installed on the planned route is used to ensure that vehicle 1 can always travel in a state where the traffic signal is green and passable. In the description of the third embodiment, the same configuration as in the first embodiment will be omitted from the description and its reference numerals will be used by reference.

[0082] In the third embodiment, when the control device 11 performs display control, an input signal from the preceding vehicle detection sensor 13 is not required. Furthermore, the control device 11 is configured to enable vehicle-to-infrastructure communication and can communicate wirelessly with roadside equipment. Vehicle 1 can obtain information regarding the color of the traffic light through this vehicle-to-infrastructure communication. The control device 11 can then control vehicle 1 so that it is always in a driving state where it can pass through with the traffic light color green. This control device 11 can perform so-called green wave driving support control.

[0083] As shown in Figures 8 and 9, when passing through multiple traffic lights, it is possible to pass through each traffic light at the same time that each traffic light turns green. Based on information obtained through vehicle-to-infrastructure communication, the control device 11 can assist the vehicle 1 in its journey so that it turns green at the time it passes through each traffic light, as shown by the arrows in Figure 9. While the Green Wave driving support control is in operation, the control device 11 calculates the energy reduction effect obtained by maintaining this control state.

[0084] The effect calculation unit 11a calculates the energy consumption reduction effect obtained when Vehicle 1 is traveling in a driving-assisted control state (a state in which Green Wave driving support control is implemented) in which Vehicle 1 can pass through multiple traffic lights when the light color is green. When traveling along the planned route, if the light color is always green when passing through each traffic light, Vehicle 1 can continue traveling without stopping at the traffic lights. Since repeated stopping and starting of Vehicle 1 worsens fuel efficiency, fuel efficiency is improved by suppressing stops at traffic lights. Therefore, an energy consumption reduction effect can be obtained when Green Wave driving support control is implemented.

[0085] In this manner, the control device 11 calculates the energy consumption reduction effect while driving with the green wave driving support control in place, generates an effect image B corresponding to the result, and performs display control to display it on the display device 12. In the third embodiment as well, it is possible to display the time image A and the effect image B adjacent to each other using the display method shown in Figures 3 to 6.

[0086] As explained above, according to the third embodiment, it becomes possible to achieve the driving plan while enjoying the energy consumption reduction effect achieved by implementing Green Wave driving support control. [Explanation of symbols]

[0087] 1 vehicle 11 Control device 11a Effect calculation unit 11b Maximum value setting section 11c Time calculation part 11d Video Generation Unit 12 Display device 13. Preceding vehicle detection sensor 14. Vehicle speed sensor 15. Car navigation system 16 GPS receivers A time image B Effect Image

Claims

1. A control device comprising a control unit that performs display control to display information about a vehicle in motion on a display device, Effect calculation unit, Time calculation unit, Equipped with, The control unit, While the vehicle is traveling toward a destination set in the navigation information, a time image is generated that shows whether the estimated arrival time, estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated arrival time determined by the navigation information at the start of the journey, as information regarding the expected time of arrival at the destination. Based on the current driving conditions of the vehicle, an effect image is generated that shows the effect of reducing the energy consumption obtained by the vehicle. The generated time image and the effect image are displayed on the display device in real time. The aforementioned effect calculation unit calculates the effect of reducing energy consumption obtained by the vehicles through platooning when the vehicles are driving in a convoy, The time calculation unit calculates the difference between the initial scheduled arrival time and the estimated arrival time. The control unit further generates the effect image based on the energy consumption reduction effect of the platooning calculated by the effect calculation unit, and generates the time image based on the difference calculated by the time calculation unit. A control device characterized by the following features.

2. A control device comprising a control unit that performs display control to display information relating to a vehicle in motion on a display device, Effect calculation unit, Time calculation unit, Equipped with, The control unit, While the vehicle is traveling toward a destination set in the navigation information, a time image is generated that shows whether the estimated arrival time, estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated arrival time determined by the navigation information at the start of the journey, as information regarding the expected time of arrival at the destination. Based on the current driving conditions of the vehicle, an effect image is generated that shows the effect of reducing the energy consumption obtained by the vehicle. The generated time image and the effect image are displayed on the display device in real time. The effect calculation unit calculates the energy reduction effect obtained by the vehicle when the vehicle is running in a control state that allows it to pass through traffic signals while the signal light is always green, The time calculation unit calculates the difference between the initial scheduled arrival time and the estimated arrival time. The control unit further generates the effect image based on the energy consumption reduction effect due to the driving state calculated by the effect calculation unit, and generates the time image based on the difference calculated by the time calculation unit. A control device characterized by the following features.

3. A control device comprising a control unit that performs display control to display information relating to a vehicle in motion on a display device, The control unit, While the vehicle is traveling toward a destination set in the navigation information, a time image is generated that shows whether the estimated arrival time, estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated arrival time determined by the navigation information at the start of the journey, as information regarding the expected time of arrival at the destination. Based on the current driving conditions of the vehicle, an effect image is generated that shows the effect of reducing the energy consumption obtained by the vehicle. The generated time image and the effect image are displayed on the display device in real time. The control unit further, The time specified by the occupants of the aforementioned vehicle is set as the target arrival time. When the vehicles are traveling in a convoy, an image is generated showing whether the target has been achieved, by comparing the estimated arrival time, which takes into account the delay in arrival time at the destination due to convoy travel, with the target arrival time. The generated approval / rejection image is displayed on the display device in real time. A control device characterized by the following features.

4. A display device that displays information about a vehicle in motion, While the vehicle is traveling toward a destination set in the navigation information, a time image showing information about the estimated time of arrival at the destination and an effect image showing the effect of reducing energy consumption are displayed in real time. The aforementioned time image is an image that shows whether the estimated arrival time, which is estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated arrival time determined by the navigation information at the start of the journey. The aforementioned effect image is an image that shows the effect of reducing energy consumption obtained by the vehicle based on the vehicle's current driving state. When the vehicles are traveling in a convoy, the system displays, in real time, an effect image corresponding to the energy reduction effect achieved by the vehicles through convoy travel, and a time image corresponding to the difference between the initial scheduled arrival time and the estimated arrival time. A display device characterized by the following features.

5. A display device for displaying information about a vehicle in motion, While the vehicle is traveling toward a destination set in the navigation information, a time image showing information about the estimated time of arrival at the destination and an effect image showing the effect of reducing energy consumption are displayed in real time. The aforementioned time image is an image that shows whether the estimated arrival time, which is estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated arrival time determined by the navigation information at the start of the journey. The aforementioned effect image is an image that shows the effect of reducing energy consumption obtained by the vehicle based on the vehicle's current driving state. When the vehicle is operating in a control state that allows it to pass through traffic lights with the light always on green, the system displays, in real time, an effect image corresponding to the energy reduction effect achieved by the vehicle in this control state, and a time image corresponding to the difference between the initial scheduled arrival time and the estimated arrival time. A display device characterized by the following features.

6. A display device for displaying information about a vehicle in motion, While the vehicle is traveling toward a destination set in the navigation information, a time image showing information about the estimated time of arrival at the destination and an effect image showing the effect of reducing energy consumption are displayed in real time. The aforementioned time image is an image that shows whether the estimated arrival time, which is estimated based on the vehicle speed and the navigation information, has been shortened or extended compared to the initial estimated arrival time determined by the navigation information at the start of the journey. The aforementioned effect image is an image that shows the effect of reducing energy consumption obtained by the vehicle based on the vehicle's current driving state. When the vehicles are traveling in a convoy, an image indicating whether or not the target has been achieved is displayed, comparing the estimated arrival time, which takes into account any delays in arrival at the destination due to the convoy travel, with a pre-set target arrival time. The aforementioned target arrival time is set to the time specified by the occupants of the vehicle. A display device characterized by the following features.

Images