JP2020185948A - Electronic device - Google Patents

Abstract

To provide an electronic device which has a function for displaying a regenerative level or an output level according to a travel condition.SOLUTION: An on-vehicle device includes: detection means which detects an own vehicle position; estimation means which estimates a maximum value of a regenerative level or a minimum value of an output level according to a travel condition on the basis of the own vehicle position detected by the detection means; and display means which displays the maximum value of the regenerative level or the minimum value of the output level and the current regenerative level or output level under the estimated current travel condition. A user compares the maximum value of the regenerative level or the minimum value of the output level with the current regenerative level or output level and he can judge whether his own driving state is optimized.SELECTED DRAWING: Figure 4

Description

The present invention relates to an electronic device having a function of displaying information about a vehicle, and more particularly to a display of a recommended value of regeneration or output level according to a running condition.

In vehicles that use a motor as a power source, the electric energy recovered by regenerative braking of the motor during deceleration is stored in a battery. The driving support device of Patent Document 1 displays information for increasing the amount of regeneration before the deceleration operation is performed. Specifically, the target position in the traveling direction of the vehicle (intersection with a traffic light, For intersections with pause lines, railroad crossings, etc.), it is determined whether deceleration can be achieved only by regenerative braking by accelerator off, and if deceleration is possible, the deceleration start point, which is the position where accelerator off should be started, is calculated. , When the vehicle reaches the deceleration start point, a deceleration recommendation display is displayed to the effect that the vehicle can be stopped at the target position only by regenerative braking. When deceleration recommendation display is performed, the predicted regenerative electric energy E (E = V1, α, M / 1000, V1 is the current vehicle speed, α is the regenerative deceleration, M is the vehicle) from the regenerative deceleration when the accelerator is off to the target position. (Weight) is calculated, the ratio R (R = (E / Emax) / 100) of the predicted regenerative electric energy E to the maximum regenerative electric energy Emax is calculated, and this ratio R is displayed on the level meter.

Japanese Unexamined Patent Publication No. 2016-117300

In the current situation where the number of charging spots is not enough, users of electric vehicles are highly interested in cruising range and electricity cost. Therefore, in electric vehicles, display during battery regeneration or output, display of battery charge level, display of instantaneous fuel consumption / electricity cost, display of cruising range (low accuracy), acceleration / deceleration information for improvement of electricity cost The display of the driving operation (excessive depression of the accelerator or excessive depression of the brake, etc.) is generally performed.

FIG. 1A shows an example of a display unit such as an instruments panel. The display unit 10 has a display such as vehicle speed 12, a display of the amount of charge of the battery 14, a display of the cruising range that can be traveled until the battery is depleted, and an output level or a battery indicating power consumption by driving the motor during traveling. A power meter display 20 or the like indicating the regeneration level indicating the recovered power charge is displayed. 1 (B) and 1 (C) are enlarged views of the power meter display 20. The power meter display 20 includes a regenerative level indicating the charge level of electric power energy to the battery due to regenerative braking and an output level indicating the consumption level of electric power energy when the vehicle is driven by the battery, and each level is Displayed as a percentage of the maximum level.

FIG. 1B shows the output level when the accelerator is depressed to consume the battery and the vehicle is running. The output level increases when the accelerator is depressed or the vehicle accelerates. FIG. 1C exemplifies the regeneration level at which the vehicle decelerates and the battery is charged when the accelerator is off or the foot brake is on. The regeneration level increases as the deceleration rate increases when the accelerator is off or when the brake is depressed. The display of regeneration level or output level responds to the user's psychology of not wanting to consume as much power as possible.

For the user, it is possible to confirm a certain level of instantaneous power consumption and cruising range, and it is also possible to compare the current regeneration level and output level with the upper limit values (regeneration MAX, output MAX). .. However, the regeneration level and output level change fluidly depending on the driving conditions (road slope, climate, weight, etc.), and the user can see that the displayed regeneration level and output level are optimal under the current driving conditions. There is a problem that it is not possible to grasp whether or not it is a good one. That is, the user cannot know whether his / her driving condition can maximize the regenerative energy or minimize the output energy with respect to the current driving conditions.

An object of the present invention is to solve such a conventional problem and to provide an electronic device having a function of displaying a regeneration level or an output level according to a running condition.

The electronic device according to the present invention has a function of displaying information about the vehicle, and corresponds to a detection means for detecting the position of the own vehicle and a traveling condition based on the position of the own vehicle detected by the detection means. An estimation means for estimating the maximum value of the regeneration level or the minimum value of the output level, an acquisition means for acquiring the current regeneration level or the output level, the maximum value of the estimated regeneration level or the minimum value of the output level, and the current state. It has a display means for displaying the regeneration level or the output level of.

In certain embodiments, the traveling conditions include road information. In certain embodiments, the driving conditions include weather information. In certain embodiments, the traveling conditions include vehicle information. In certain embodiments, the display means displays a state of divergence between the estimated maximum or minimum output level and the current regeneration or output level. In certain embodiments, the estimation means estimates the maximum regenerative level or the minimum output level according to a pre-prepared algorithm.

According to the present invention, the maximum value of the regeneration level or the minimum value of the output level is estimated according to the driving conditions of the road currently being traveled, and the current maximum value of the regenerative level or the minimum value of the output level is estimated together with the current minimum value. By displaying the regeneration level or output level, the user can know the regeneration or output energy according to the driving conditions, so that his / her driving condition maximizes the regeneration or minimizes the output. It is possible to judge whether it is optimal or not.

It is a figure which shows the display example of the regeneration / output level of the conventional electric vehicle. It is a figure which shows the structure of the vehicle-mounted display device which concerns on embodiment of this invention. It is a figure which shows the functional structure of the display program which concerns on embodiment of this invention. This is an example of displaying the regeneration level or the output level according to the embodiment of the present invention. This is another display example of the regeneration level or the output level according to the embodiment of the present invention.

The electronic device according to the present invention may be an in-vehicle device fixedly mounted on the moving body or may be an in-vehicle device removable from the moving body. Further, the electronic device according to the present invention may be a portable information terminal (for example, a multifunctional mobile phone such as a smartphone or a notebook computer) that can be carried by a user to a mobile body.

Next, examples of the present invention will be described in detail with reference to the drawings. Here, an in-vehicle device mounted on an electric vehicle or the like whose power source is a motor will be described as an example. FIG. 2 is a block diagram showing a configuration of an in-vehicle device according to the present embodiment. The in-vehicle device 100 is connected to an input unit 110, a position detection unit 120, a navigation unit 130, a telematics control unit (hereinafter referred to as TCU) 140 which is a communication module of an automobile, and an in-vehicle network such as an in-vehicle bus or CAN (Controller Area Network). It includes a network connection unit 150, a display unit 160, an audio output unit 170, a storage unit 180, and a control unit 190 that enable connection. The configuration shown here is an example, and the in-vehicle device 100 may include other functions such as an audio / visual function, a television / radio broadcast reception function, and a function of displaying an image of an in-vehicle camera. Good.

The input unit 110 includes an input key device, a voice input recognition device, a touch panel, and the like, receives an instruction from the user via these devices, and provides the instruction to the control unit 190. The position detection unit 120 detects the current position of the own vehicle by using the GPS signal received via the TCU 140 and / or the detection result of the independent direction sensor such as the gyro sensor. The current position of the own vehicle detected by the position detection unit 120 is provided to the control unit 190 and the navigation unit 130.

When the navigation unit 130 displays the vehicle position mark on the road map data based on the vehicle position information detected by the position detection unit 120, or when the destination or waypoint is set via the input unit 110, the navigation unit 130 displays the vehicle position mark. The route from the position of the own vehicle to the destination is searched, and the searched route guidance is output from the display unit 160 and the voice output unit 170.

The TCU 140 is a composite communication module that receives GPS signals from positioning satellites and transmits / receives wireless signals of portable wireless communication networks such as 3G / 4G / 5G and WiFi. For example, the TCU 140 downloads the updated data of the road map of the navigation unit 130 from the server via the Internet or the like, automatically makes an emergency call to the emergency number in the event of a vehicle accident, real-time weather information, road traffic information, etc. Can be obtained from the server.

The network connection unit 150 acquires various information about the vehicle via the in-vehicle bus, the in-vehicle LAN, or the like. For example, information on the regeneration level when the vehicle is regeneratively braked, information on the output level when the vehicle is driven by the battery, vehicle weight, vehicle speed information, information on the remaining charge capacity of the battery, etc. are acquired. ..

The storage unit 180 stores road map data used in the navigation unit 130, and stores data, software, and the like required for the in-vehicle device 100. The control unit 190 controls the operation of each unit of the vehicle-mounted device 100. In one embodiment, the control unit 190 includes a microprocessor or microcontroller including a ROM / RAM or the like, and the ROM / RAM stores a program for controlling each unit. In this embodiment, the control unit 190 will explain in detail when executing a display program for displaying the recommended values of regeneration / output energy according to the traveling conditions on the display unit 160.

FIG. 3 is a block diagram showing a functional configuration of the display program of this embodiment. The display program 200 includes a road information acquisition unit 210, a weather information acquisition unit 220, a traffic information acquisition unit 230, a regeneration / output information acquisition unit 240, a vehicle information acquisition unit 250, a recommended value estimation unit 260, and a recommended value display unit 270. Consists of.

The road information acquisition unit 210 acquires the current road information on which the vehicle is traveling based on the vehicle position detected by the position detection unit 120. The road information may be acquired from the road map data used by the navigation unit 130, or the road map data may be acquired from a server on the Internet via the TCU 140. From the road map data, the road information acquisition unit 210 uses, for example, the road type (highway, national road, prefectural road, city road, etc.), speed limit, road slope, straight road or curve of the road on which the vehicle is traveling. Get information such as.

The weather information acquisition unit 220 acquires weather information of the area in which the own vehicle is traveling based on the position of the own vehicle detected by the position detection unit 120. The weather information is acquired from a server on the Internet via, for example, TCU140. The weather information acquisition unit 220 acquires, for example, the weather (sunny weather, rainy weather, snow cover), wind speed, and the like.

The traffic information acquisition unit 220 provides real-time traffic information on the road on which the vehicle is traveling based on the vehicle position detected by the position detection unit 120, for example, a server on the Internet or other road traffic via the TCU 140. Obtained from the information distribution service. Traffic information includes, for example, speed regulation due to traffic congestion and bad weather.

The regeneration / output information acquisition unit 250 acquires information on the current regeneration level or output level of the own vehicle via the network connection unit 150. The regeneration level or output level is calculated, for example, in the power management unit or the engine control unit that manages the battery mounted on the own vehicle. The information on the regenerative level includes the amount of regenerative power charged to the battery by regenerative braking or a ratio thereof, and the information on the output level includes the amount of power consumed when the battery is driven or a ratio thereof. This information is displayed together with the recommended values for the regeneration level and output level, which will be described later.

The vehicle information acquisition unit 260 acquires information about the vehicle via the network connection unit 150. The vehicle information includes, for example, the traveling speed of the own vehicle, the driver's operation information (accelerator on / off, brake on / off), the weight of the vehicle, and the like. The weight of the vehicle preferably includes the weight according to the number of occupants. For example, when a seat sensor is installed, the weight of the occupant may be calculated by multiplying the number of seats detected by the seat sensor by the standard weight, or the vehicle is equipped with a weight sensor that detects the weight of the occupant. If so, the detection result can be used as the weight of the occupant.

The recommended value estimation unit 260 is acquired by the road information acquired by the road information acquisition unit 210, the weather information acquired by the weather information acquisition unit, the traffic information acquired by the traffic information acquisition unit 230, and the vehicle information acquisition unit 250. Using at least one or more of the vehicle information, the recommended value of the regeneration level or the output level according to the driving conditions of the road on which the own vehicle is currently traveling is estimated. The recommended value here is the maximum value of the regeneration level that can be regenerated under the current driving conditions, or the minimum value of the output level that can suppress the output to the minimum.

The recommended value estimation unit 260 estimates the maximum value of the regeneration level or the minimum value of the output level in real time in consideration of various fluctuating factors of the driving conditions when traveling on the current road. For example, road information includes attributes such as road slope, road curvature, and speed limit. If the slope of the road is up, you have to step on the accelerator to drive, that is, you have to consume the power of the battery to drive, and if the slope of the road is down, you have to drive. Therefore, it is necessary to depress the accelerator, regenerative braking is required by turning off the accelerator, and regenerative braking using a brake is required. In addition, since a speed limit is set on the road, it is necessary to drive at a speed that does not exceed this speed limit. At this time, the traffic information acquired by the traffic information acquisition unit 230 may impose a speed limit due to traffic congestion or the like. Further, the friction coefficient between the tire and the road differs depending on the weather. For example, if the road surface is wet, the tire becomes slippery, and the regenerative energy decreases or the output energy increases accordingly. Furthermore, as the weight of the vehicle increases, the output energy increases accordingly.

The recommended value estimation unit 260 estimates the maximum value of the regeneration level or the minimum value of the output level according to the traveling conditions by an algorithm considering such a situation. Further, the recommended value estimation unit 260 updates the running conditions in substantially real time at regular time intervals, and updates the recommended values accordingly. Further, the recommended value estimation unit 260 cooperates with the navigation unit 130 to change the course of the own vehicle (passing an intersection) or the type of road on which the own vehicle travels (for example, from a general road to an expressway). It is possible to update the recommended value in response to (entry).

The recommended value display unit 270 displays the maximum value of the regeneration level or the minimum value of the output level estimated by the recommended value estimation unit 260 together with the current regeneration level or output level acquired by the regeneration / output information acquisition unit 240. Display at 160. The display mode of the regeneration level or the output level is not particularly limited, but for example, as shown in FIG. 1, the number of circles may be changed or the number of bars may be changed according to the size of the regeneration level or the output level. It may be anything.

FIG. 4 shows some display examples by the recommended value display unit 270. FIG. 4A is a display example of a case in which sufficient regeneration is not obtained on the regenerative traveling route. As shown in the figure, the current regeneration level is displayed as a ratio to the maximum regeneration level, and the maximum value of the regeneration level under the current running conditions estimated by the recommended value estimation unit 260 is displayed. The driver recognizes that there is a difference between the current regeneration level and the recommended value (maximum regeneration level), and it is possible to raise the regeneration level a little more by improving his / her driving operation. The driver predicts that the regenerative level is decreasing due to heavy use of sudden braking (foot brake), for example, and knows that the current regeneration level approaches the recommended value by reducing the sudden braking. It will be possible.

FIG. 4B is a display example of a case in which output is excessively performed in a traveling route that requires output by battery drive. As shown in the figure, the current output level is displayed as a ratio to the maximum output level, and the minimum value of the output level under the current driving conditions estimated by the recommended value estimation unit 260 is displayed. The driver recognizes that there is a difference between the current regeneration level and the recommended value (minimum output level), and it is possible to lower the output level a little more by improving his driving operation. The driver can anticipate that the output level is increasing due to overspeed or sudden acceleration, for example, and know that the current output level approaches the recommended value by stopping the overspeed or sudden acceleration. It will be possible.

FIG. 4C is a display example of a case in which traveling is performed by output on a regenerative traveling route. As shown in the figure, the current output level is displayed as a ratio to the maximum output level, and the maximum value of the regeneration level under the current running conditions estimated by the recommended value estimation unit 260 is displayed. The driver recognizes that the vehicle is traveling on a regenerative route but consumes battery power. For example, the driver predicts that the output level is caused by operating the accelerator on a downhill where the vehicle can run without operating the accelerator, and by stopping the accelerator operation, the output level is reduced to zero and a regeneration level is generated. It becomes possible to know what to do.

FIG. 5 is a display example when applied to a power meter display as shown in FIG. FIG. 5A is a display example of a case in which sufficient regeneration is not obtained on the regenerative traveling route. Rc is the maximum value of the regeneration level estimated by the recommended value estimation unit 260. FIG. 5B is a display example of a case in which output is excessively performed in a traveling route that requires output by battery drive. Rp is the minimum value of the output level estimated by the recommended value estimation unit 260.

According to this embodiment, by displaying the maximum value of the regeneration level or the minimum value (recommended value) of the output level according to the driving condition as described above, the user can use the recommended value according to the driving condition and the actual value. Compared with the regeneration level or output level, is the current driving state able to maximize the regenerative energy obtained at any driving time, or minimize the output energy lost at any driving time? Can be judged. Then, the user himself can perform optimum acceleration / deceleration control, improve the electricity cost by eco-driving, and extend the cruising range.

In the above embodiment, examples of displaying recommended values for the regeneration level and the output level are shown in FIGS. 4 and 5, but this is just an example, and the recommended values for the regeneration level and the output level may be displayed numerically. , In this case, the difference between the current regeneration level or output level and the recommended value may be displayed numerically. In short, the display mode may be such that the user can grasp the state of deviation from the recommended value.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and modifications are made within the scope of the gist of the invention described in the claims. It can be changed.

10: Display unit 12: Vehicle speed display 14: Battery charge amount display 16: Cruising range display 20: Power meter-display 100: In-vehicle device 110: Input unit 120: Position detection unit 130: Navigation unit 140: TCU
150: Vehicle information acquisition unit 160: Display unit 170: Voice output unit 180: Storage unit 190: Control unit

Claims (6)

An electronic device that has the function of displaying information about the vehicle.
A detection means that detects the position of the vehicle and
An estimation means for estimating the maximum value of the regeneration level or the minimum value of the output level according to the driving conditions based on the vehicle position detected by the detection means, and
With the acquisition method to obtain the current regeneration level or output level,
A display means for displaying the maximum value or output level of the estimated estimated regeneration level and the current regeneration level or output level.
Electronic device with. The electronic device according to claim 1, wherein the traveling condition includes road information. The electronic device according to claim 1, wherein the running condition includes weather information. The electronic device according to claim 1, wherein the traveling condition includes vehicle information. The electronic device according to claim 1, wherein the display means displays a state of deviation between the maximum value of the estimated regeneration level or the minimum value of the output level and the current regeneration level or output level. The electronic device according to claim 1, wherein the estimation means estimates the maximum value of the regeneration level or the minimum value of the output level according to an algorithm prepared in advance.

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