WO2014013755A1

WO2014013755A1 - Driving assistance system, method and program

Info

Publication number: WO2014013755A1
Application number: PCT/JP2013/057644
Authority: WO
Inventors: 雅貴西田; 直樹三浦
Original assignee: アイシン・エィ・ダブリュ株式会社
Priority date: 2012-07-18
Filing date: 2013-03-18
Publication date: 2014-01-23
Also published as: JP2014021725A; JP6024255B2

Abstract

[Problem] To provide a technique for effectively solving the cause of deterioration of fuel economy. [Solution] The position of a deterioration section that is a unit section in which the evaluation of fuel economy of a vehicle in the past travel of the vehicle is lower than a predetermined evaluation level, and a deterioration cause that is the cause of deterioration of fuel economy in the deterioration section are acquired, and when the vehicle approaches the deterioration section that is subject to guidance in the current travel, guidance corresponding to the deterioration cause in the deterioration section is provided.

Description

Driving support system, method and program

The present invention relates to a driving support system, method, and program for providing guidance corresponding to a cause of deterioration in fuel consumption of a vehicle.

Conventionally, various techniques for providing advice for improving fuel efficiency of vehicles are known. For example, Patent Document 1 discloses a technique for assisting fuel consumption improvement by displaying an instruction for eco-driving on a map in on-route scrolling that scrolls a map along a travel route. .

Japanese Patent No. 4513826

In the conventional technology described above, it has been difficult to give effective instructions for improving fuel efficiency. In other words, since the on-route scrolling is a function that is executed in a state where the vehicle is stopped, such as before the start of traveling, an instruction for improving fuel efficiency related to a point on the traveling route reaches the point. Be communicated to the driver before. For this reason, it is difficult for the driver to remember and practice the instruction by himself / herself at the timing when the driver should improve the driving operation in accordance with the instruction for improving the fuel consumption. In particular, when instructions for improving fuel efficiency are transmitted at a plurality of locations, it is virtually impossible to recall them in order and improve driving operations at appropriate points.

Furthermore, the cause of deterioration in fuel consumption in a certain section does not always occur in that section. For example, when a cause of deterioration in fuel consumption occurs in a section including the traffic signal due to the driving tendency of the driver depending on the signal indicated by the traffic signal, the cause of deterioration in fuel consumption occurs in a specific state of the signal of the traffic signal in the vicinity of the traffic signal, In other states, there is a high possibility that the cause of deterioration in fuel consumption will not occur. And if the cause of the fuel consumption deterioration does not occur, even if an instruction for eliminating the cause of the fuel deterioration is given, it does not lead to fuel efficiency improvement.
The present invention has been made in view of the above problems, and an object thereof is to effectively eliminate the cause of fuel consumption deterioration.

In order to achieve the above object, in the present invention, the position of a deteriorated section that is a unit section in which the evaluation of the fuel consumption of the vehicle in the past travel of the vehicle is worse than a predetermined evaluation level, and the cause of the deterioration of the fuel consumption in the deteriorated section When the vehicle approaches a deteriorated section to be guided in the current travel, guidance corresponding to the cause of deterioration in the deteriorated section is performed. That is, when the vehicle approaches the deteriorated section, the cause of deterioration that is the cause of deterioration of the fuel consumption of the deteriorated section is guided. As a result, it is possible for the driver to recognize the cause of deterioration at the stage where driving for eliminating the cause of deterioration should be performed, and the driver can easily eliminate the cause of fuel consumption deterioration. Is possible.

In addition, when the vehicle approaches the deteriorated section to be guided, guidance corresponding to the cause of the deterioration is performed, so whether or not the cause of the deterioration reoccurs when the vehicle reaches the deteriorated section. The person himself can easily judge. Therefore, it can be easily determined whether or not the driving operation for eliminating the cause of the deterioration should be performed.

Furthermore, since the cause of deterioration is specified based on the past driving of the vehicle, the cause of deterioration of fuel consumption specific to the driver can be transmitted. For this reason, even if it is a point where it is generally preferable to give advice on improving fuel efficiency from the road shape, etc., the driver must not cause a deterioration cause corresponding to the advice at the point in the past driving The cause of the deterioration is not guided, and guidance suitable for the driving tendency of the driver can be provided.

Here, the past travel history acquisition means includes a position of a deteriorated section that is a unit section in which the fuel efficiency evaluation of the vehicle in the past travel is worse than a predetermined evaluation level, and a cause of deterioration that is a cause of fuel deterioration in the deteriorated section. I just need to get it. That is, in the driving process of the past driving, information for evaluating the fuel consumption for each unit section is acquired, and the evaluation level is associated with the fuel consumption of the past driving by evaluating the information according to a predetermined evaluation standard. And Then, the position of the unit section whose fuel consumption evaluation is worse than a predetermined evaluation level is specified as the position of the deteriorated section. In addition, information for evaluating the cause of deterioration in fuel consumption for each unit section in the travel process of the past travel is acquired, and the cause of deterioration in fuel consumption that occurred in the deterioration section is specified based on the information. The cause of deterioration may be a cause of deterioration in fuel consumption when the vehicle travels in a unit section, and one or more of a plurality of causes may be specified as the cause of deterioration. The predetermined evaluation level is a level set in advance as a level that can be regarded as having room for improving fuel consumption.

Further, the cause of the deterioration may be any cause that can be expected to improve the fuel consumption by notifying the driver. For example, the operating state of the vehicle in which the fuel consumption of the vehicle deteriorates is classified into a plurality of items, It is possible to adopt a configuration that considers that the cause of deterioration has occurred when a state corresponding to the operation state of the item occurs. The item only needs to correspond to the cause of deterioration, the driving scenes that may cause each deterioration cause may be classified into items, and the cause of deterioration may be defined, or the driving operation corresponding to each deterioration cause is classified into items Then, the cause of deterioration may be defined, and various configurations can be adopted. In addition, when there are a plurality of causes of deterioration in one unit section, the cause of worsening the fuel consumption may be the cause of deterioration, or n causes (n is an integer of 2 or more) that causes a large degree of deterioration of the fuel consumption. The cause corresponding to the state that occurred over the longest distance in the unit section may be used as the cause of deterioration, and various configurations can be adopted.

The deterioration cause guidance means only needs to be able to provide guidance corresponding to the cause of deterioration in the deteriorated section when the vehicle approaches the deteriorated section to be guided in the current travel. In other words, by giving guidance corresponding to the cause of deterioration to the driver who is traveling this time, the situation where the driver can eliminate the cause of deterioration by performing the driving operation according to the guidance, that is, the position of the deterioration section What is necessary is just to be comprised so that a driver | operator can eliminate the cause of a deterioration, without memorize | storing. In addition, the driver himself determines whether or not the cause of deterioration corresponding to the guidance performed in the course of the current driving will reoccur in the current driving, and if the driver can reoccur, the driver can eliminate the cause of the deterioration. What is necessary is just to be comprised so that the guidance corresponding to the deterioration cause can be performed in the stage which became.

The guidance corresponding to the cause of deterioration may be any guidance that allows the driver to perform a driving operation for eliminating the cause of the deterioration by the guidance, and the guidance may be performed by voice output or an image. It may be done by output. Further, whether or not the vehicle has approached the deteriorated section in the current travel may be determined based on the position of the vehicle and the position of the deteriorated section in the current travel or not. . The determination as to whether or not the vehicle has approached is made based on a distance, time, or the like that allows the driver to perform a driving operation according to the guidance without forgetting the guidance after guidance. It is only necessary to be configured to be based on a distance, time, etc. that the driver can judge after guidance whether or not the vehicle will reoccur. Such distance, time, etc. are preliminarily defined as criteria for judging approach. It should be.

As a specific example of the approach determination, the closest deteriorated section existing ahead of the vehicle in the planned travel route in the current travel is set as the deteriorated section to be guided, and the distance between the position of the deteriorated section and the vehicle position is equal to or less than a predetermined distance. In such a case, it may be configured to provide guidance corresponding to the cause of deterioration in the deteriorated section. That is, it is determined whether or not the vehicle has approached the deterioration zone by a predetermined distance defined in advance. Note that the timing of guidance can be determined in consideration of various other factors. For example, in a configuration in which route guidance is performed by voice, the cause of the deterioration of the deterioration section between voice outputs for route guidance is provided. It is good also as a structure which performs guidance corresponding to. According to this configuration, it is possible to provide guidance corresponding to the cause of deterioration in the deteriorated section without overlapping with other guidance.

Furthermore, before the vehicle reaches the deteriorated section to be guided in the current traveling, guidance corresponding to the cause of deterioration in the deteriorated section may be performed. According to this configuration, it is possible to prepare for performing the driving operation corresponding to the deterioration cause before reaching the deterioration section, and to reliably start the driving operation corresponding to the deterioration cause after reaching the deterioration section. Is possible.

Furthermore, before the vehicle enters the deteriorated section to be guided, the voice guidance corresponding to the cause of deterioration in the deteriorated section may be performed so that the guidance is completed. That is, when the cause of deterioration is guided by voice, a predetermined period is required after the start of guidance until the guidance is completed. And if guidance is completed, it can be considered that all the guidance contents were transmitted to the driver. Therefore, if the guidance is made so that the voice guidance corresponding to the cause of the deterioration in the deteriorated section is terminated before the vehicle enters the deteriorated section to be guided, the entire guidance content is transmitted to the driver. It is possible to prevent the vehicle from reaching the deteriorated section before the vehicle starts.

Furthermore, when the deterioration sections are continuous, the cause of deterioration may be guided for each deterioration section, but the cause of deterioration may be edited and guided. As a specific example of the latter, for example, when other deteriorated sections are continuously present in the deteriorated section to be guided, the guidance corresponding to the combination of the causes of deterioration in the consecutive deteriorated sections is performed. Can be adopted. According to this configuration, it is possible to transmit the cause of deterioration in consecutive deteriorated sections to the driver without performing guidance corresponding to the cause of deterioration in all the deteriorated sections. Therefore, even when the number of consecutive deteriorated sections is large, it is possible to prevent the guidance from becoming complicated, and the driver can easily understand instructions for improving fuel consumption.

In this case, in addition, when there are other deteriorated sections continuously in the deteriorated section to be guided and the cause of deterioration is the same in all the consecutive deteriorated sections, the vehicle in the consecutive deteriorated sections It is good also as a structure which performs the guidance corresponding to the cause of deterioration of the deterioration area nearest to. In other words, if the cause of deterioration is the same in all of the deterioration sections that are continuous after that, starting with the deterioration section that is the target of guidance, it is configured to perform guidance corresponding to the cause of deterioration once, It is configured to prevent the cause of deterioration from being sequentially guided for each deterioration section and to provide easy-to-understand guidance.

Furthermore, as a specific example of guidance, it may be configured to perform one or both of guidance indicating the content of the cause of deterioration in the deteriorated section and guidance for eliminating the cause of deterioration in the deteriorated section. If guidance indicating the content of the cause of deterioration in the deteriorated section is provided, the cause of deterioration can be transmitted to the driver, and the driver can select the driving operation for eliminating the cause of deterioration. According to the guidance for eliminating the cause of deterioration in the deteriorated section, the cause of the deterioration can be eliminated by the driver performing the driving operation according to the guidance.

Furthermore, as in the present invention, the method of guiding the cause of deterioration of fuel consumption in the deteriorated section when the vehicle approaches the deteriorated section in this traveling can be applied as a program or method. In addition, the system, program, and method as described above may be realized as a single device, or may be realized by using components shared with each unit provided in the vehicle when realized by a plurality of devices. It can be assumed and includes various aspects. For example, it is possible to provide a navigation system, method, and program including the above-described devices. Further, some changes may be made as appropriate, such as a part of software and a part of hardware. Furthermore, the invention can be realized as a recording medium for a program for controlling the system. Of course, the software recording medium may be a magnetic recording medium, a magneto-optical recording medium, or any recording medium to be developed in the future.

It is a block diagram which shows the navigation terminal containing a driving assistance system. It is a flowchart which shows an evaluation information acquisition process. It is a flowchart which shows an evaluation information display process. It is a flowchart which shows a deterioration cause guidance process. (5A) is a figure which shows the example of the map displayed, (5B) (5C) (5D) is a figure which shows the example of the permutation of a cause of deterioration.

Here, embodiments of the present invention will be described in the following order.
(1) Configuration of navigation terminal:
(2) Evaluation information acquisition process:
(3) Evaluation information display processing:
(4) Deterioration cause guidance processing:
(5) Other embodiments:

(1) Configuration of navigation terminal:
FIG. 1 is a block diagram showing a configuration of a driving support system mounted on a vehicle. In the present embodiment, the driving support system is realized by the navigation terminal 10. The navigation terminal 10 includes a control unit 20 that includes a CPU, a RAM, a ROM, and the like, and the control unit 20 can execute a program stored in the ROM. In this embodiment, a navigation program can be executed as one of the programs. The navigation program displays a map including the current position of the vehicle on the display unit of the navigation terminal, searches for a planned travel route from the departure point specified by the driver to the destination, and drives the driver along the planned travel route. This is a program for causing the control unit 20 to realize the function of guiding the user to the destination. In the present embodiment, the navigation program displays the current evaluation and the past evaluation on the display unit, and when the vehicle approaches a deteriorated section whose past evaluation is worse than a predetermined evaluation level in the current travel, the deteriorated section. A driving support program 21 for guiding the cause of deterioration in fuel consumption is included.

The vehicle according to the present embodiment includes a GPS receiver 41, a vehicle speed sensor 42, a gyro sensor 43, and a user I / F unit 44. The GPS receiver 41 receives a radio wave from a GPS satellite and outputs a signal indicating a signal for calculating the current position of the vehicle via an interface (not shown). The control unit 20 acquires this signal and acquires the current position of the vehicle. The vehicle speed sensor 42 outputs a signal corresponding to the rotational speed of the wheels provided in the vehicle. The control unit 20 acquires this signal via an interface (not shown) and acquires the vehicle speed. The gyro sensor 43 detects angular acceleration about turning in the horizontal plane of the vehicle, and outputs a signal corresponding to the direction of the vehicle. The control unit 20 acquires this signal and acquires the traveling direction of the vehicle. The vehicle speed sensor 42, the gyro sensor 43, and the like are used for specifying the travel locus of the vehicle. In the present embodiment, the current position is specified based on the departure position and the travel locus of the vehicle, and the departure position and the travel are determined. The current position of the vehicle specified based on the trajectory is corrected based on the output signal of the GPS receiver 41.

Note that the control unit 20 can also acquire the acceleration of the vehicle based on the vehicle speed acquired based on the signal output from the vehicle speed sensor 42. The control unit 20 can determine whether or not a cause of deterioration that deteriorates the fuel consumption of the vehicle has occurred in the vehicle by determining whether or not the vehicle speed and acceleration meet predetermined determination conditions. . In the present embodiment, traveling of the vehicle when it is not traveling that deteriorates fuel consumption is referred to as economic traveling.

The user I / F unit 44 is an interface unit for inputting a driver's instruction and providing various information to the driver. The user I / F unit 44 includes a display unit including a touch panel display (not shown), an input unit such as a switch, a speaker, and the like. Audio output unit. The user I / F unit 44 receives a control signal from the control unit 20, displays an image for performing various guidance on the touch panel display, and outputs sound for performing various guidance from a speaker.

The map information 30a is recorded on the recording medium 30. The map information 30a includes node data indicating the position of the node corresponding to the end point of the road on which the vehicle travels, shape interpolation point data indicating the position of the shape interpolation point for specifying the shape of the road between the nodes, the nodes The link data indicating the connection of the link is included. Moreover, in this embodiment, the evaluation information 30b which shows evaluation of the fuel consumption of a vehicle is recorded whenever a vehicle drive | works. In the present embodiment, the evaluation information 30b is information indicating the proportion of the economy traveling in the unit section. Further, in the present embodiment, when a cause of deterioration in fuel consumption occurs in a unit section, information indicating the cause of deterioration and the distance traveled by the vehicle in a state where the cause of deterioration has occurred corresponds to the evaluation information 30b. Attached and recorded.

In the present embodiment, when the evaluation information 30b is recorded in a state where the destination is set and traveled, information indicating the destination and the departure place is recorded in association with the evaluation information 30b. . Further, in the present embodiment, when a predetermined cause of deterioration occurs in a plurality of driving scenes assumed in advance, the fuel consumption is considered to deteriorate, and the cause of deterioration is classified for each of the plurality of driving scenes. . That is, the control unit 20 determines whether or not the vehicle speed and acceleration acquired based on the output signal of the vehicle speed sensor 42 described above match the determination conditions set in advance for each traveling scene. In the driving scene, it is assumed that a predetermined cause of deterioration has occurred, and the information indicating the driving scene and the distance traveled by the vehicle in the state where the cause of deterioration has occurred are associated with the evaluation information 30b. Record.

The control unit 20 displays a map including the current evaluation and the past evaluation on the display unit of the user I / F unit 44 by executing the driving support program 21 included in the navigation program. When the vehicle approaches a deteriorated section worse than a predetermined evaluation level, the cause of fuel consumption deterioration in the deteriorated section is guided. In order to execute this process, the driving support program 21 includes a current travel history acquisition unit 21a, a past travel history acquisition unit 21b, and a deterioration cause guidance unit 21c.

This time travel history acquisition unit 21a executes an evaluation information acquisition process to be described later in the course of traveling of the vehicle, and acquires evaluation information 30b for each unit section (a section of a constant distance (for example, 100 m) in the present embodiment). A program module that causes the control unit 20 to realize the function of recording in the recording medium 30. In addition, the current travel history acquisition unit 21a causes the control unit 20 to realize a function of acquiring a current evaluation indicating, for each unit section, an evaluation of fuel consumption in the current travel of the vehicle based on the evaluation information 30b.

In the evaluation information acquisition process, the cause of the deterioration is caused by comparing one or both of the vehicle speed and acceleration acquired based on the output signal of the vehicle speed sensor 42 of the vehicle with the determination condition defined for each traveling scene. Whether or not it has occurred is specified. When a cause of deterioration occurs, information indicating the cause of deterioration is associated with the evaluation information 30b. In the present embodiment, it is determined whether or not a cause of deterioration has occurred in a state where the vehicle is in each of the driving scenes of “start”, “acceleration”, “deceleration”, “cruising”, and “high-speed driving”. The determination conditions are set in advance for each traveling scene. Details of the evaluation information acquisition process will be described later.

In the present embodiment, the driver operates the user I / F unit 44 by the function of the navigation program to set the destination, and the current position of the vehicle at the time of setting the destination is set as the starting point. Search and guide the route from the starting point to the destination. If the vehicle is currently traveling from the departure point to the destination, the traveling from the departure point to the destination is regarded as the current traveling. That is, the section traveled this time is a section where the starting point is the starting point and the current position is the end point, and the total distance of the section that traveled this time is increased until the vehicle reaches the destination as the vehicle travels. When traveling with the destination set is performed and the vehicle reaches the destination, the control unit 20 records the evaluation information 30b and evaluates information about each unit section from the departure point to the destination. 30b is recorded in association with the departure place and the destination.

From the evaluation information 30b acquired as described above, the current evaluation and the past evaluation are generated. The control unit 20 acquires the evaluation related to the current travel as the current evaluation from the evaluation information 30b by the process of the current travel history acquisition unit 21a. For this purpose, the control unit 20 acquires evaluation information 30b for each unit section in the section in which the vehicle has traveled this time before reaching the destination after the start of traveling of the vehicle at the departure place. And the control part 20 compares the economical driving | running | working ratio for every unit area which evaluation information 30b shows with a predetermined | prescribed evaluation level (predetermined threshold value), and when it is more than a predetermined | prescribed evaluation level, evaluation of fuel consumption is "good", When the economic travel ratio is smaller than a predetermined evaluation level, the fuel efficiency is evaluated as “bad” and the current evaluation for each unit section.

Note that the predetermined evaluation level only needs to be determined when the fuel consumption is evaluated, and in the present embodiment, the predetermined evaluation level is set according to the driver's own driving technique set in advance. That is, the driver designates his / her driving technique by designating one of a plurality of levels through the input unit of the user I / F unit 44, and the control unit 20 increases the value as the designated level increases. The threshold as the evaluation level is determined so that In the present embodiment, there are three levels for indicating driving skills: beginner, intermediate, and advanced.

The past travel history acquisition unit 21b has a function of acquiring a past evaluation indicating, for each unit section, a fuel efficiency evaluation of the vehicle in the past than the current travel, and a deterioration section in which the past evaluation is a unit section that is worse than a predetermined evaluation level. This is a program module that causes the control unit 20 to realize the position of and the function of acquiring the cause of deterioration that is the cause of fuel consumption deterioration in the deteriorated section. In the present embodiment, the control unit 20 becomes a display target of past evaluation when a vehicle departs from the same point as the departure point in the past and travels to the same point as the destination. Considered past driving. And the control part 20 acquires the evaluation for every unit area of the area which the vehicle drive | worked by the past driving | running | working as a past evaluation.

For this purpose, the control unit 20 acquires information indicating the economic travel ratio associated with the same starting point and destination as the above-described current travel from the evaluation information 30b. Then, the control unit 20 compares the economic travel ratio with a predetermined evaluation level (predetermined threshold value), and if it is equal to or higher than the predetermined evaluation level, the fuel efficiency is evaluated as “good”, and the economic travel ratio is a predetermined evaluation. When the level is smaller than the level, the fuel efficiency is evaluated as “bad”. The unit section determined as “bad” in this way is a deteriorated section, and the control unit 20 records information indicating the deteriorated section in a memory (not shown). In addition, in order to determine whether the starting point and the destination are the same for the current driving and the past driving, a predetermined margin is provided for the distance from the point. For example, two points within a distance of 300 m A configuration that is regarded as the same can be adopted. In addition, when traveling from the same starting point to the same destination as the current traveling for a plurality of times in the past, if one piece of information is obtained for each unit section from the evaluation information 30b recorded at each traveling good. For example, the structure which acquires the evaluation information 30b at the time of driving | running | working at the time nearest to the present among past driving | running | working, the structure which acquires the evaluation information 30b with the best evaluation among past driving | running | working, etc. Can be adopted.

Furthermore, the control unit 20 acquires a cause of deterioration that is a cause of deterioration of fuel consumption in the deterioration section. In the present embodiment, the information indicating the traveling scene is acquired by regarding that the information indicating the traveling scene associated with the evaluation information 30b is equivalent to the cause of the deterioration. That is, since the determination condition for determining whether or not the fuel consumption is deteriorated is determined in advance for each traveling scene, when the traveling scene is specified, the cause of the deterioration is specified.

The deterioration cause guiding unit 21c has a function of displaying a map around the current position along with the current position of the vehicle on the display unit of the user I / F unit 44, and displaying the current evaluation and past evaluation for each unit section on the map. It is a program module to be realized by the control unit 20. The deterioration cause guidance unit 21c realizes the function of displaying the current evaluation and the past evaluation in the control unit 20, and further, when the vehicle approaches the deterioration section to be guided in the current travel, the cause of deterioration in the deterioration section The control unit 20 realizes a function for performing guidance corresponding to the above. That is, the control unit 20 specifies the current position of the vehicle based on the output signals of the GPS receiving unit 41, the vehicle speed sensor 42, and the gyro sensor 43, specifies the display range of the map around the current position of the vehicle, and displays the display range. Information on roads, facilities, etc. is extracted from the map information 30a. Then, the control unit 20 outputs a control signal for drawing a map indicating the current position of the vehicle and roads and facilities around the current position to the display unit of the user I / F unit 44. As a result, the display unit of the user I / F unit 44 displays a map showing roads and facilities around the current position of the vehicle, and the current position of the vehicle.

Further, the control unit 20 outputs a control signal for rendering the current evaluation and the past evaluation on the map to the display unit of the user I / F unit 44 by the process of the deterioration cause guiding unit 21c. As a result, the display unit of the user I / F unit 44 displays an icon indicating the current evaluation (an icon indicating “good” or “bad”) and an icon indicating the past evaluation (“good” on the road around the current position of the vehicle. ”Or“ Evil ”icon).

Further, the control unit 20 specifies a deterioration section to be a guidance target by the processing of the deterioration cause guide unit 21c. That is, the control unit 20 identifies the current position of the vehicle based on the output signals of the GPS receiving unit 41, the vehicle speed sensor 42, and the gyro sensor 43, and determines the nearest deterioration section existing in front of the vehicle along the planned travel route. It is specified as a guidance target. And the control part 20 acquires the position of the deterioration area of guidance object.

Furthermore, when the vehicle approaches a deteriorated section to be guided by the process of the deterioration cause guiding unit 21c, the control unit 20 performs guidance corresponding to the cause of deterioration in the deteriorated section. That is, when the distance between the current position of the vehicle and the position of the deteriorated section to be guided is equal to or less than a predetermined distance, the control unit 20 performs guidance corresponding to the cause of the deterioration in the deteriorated section. In the present embodiment, the cause of deterioration is specified by information indicating the driving scene. Therefore, voice data for outputting voice guidance for eliminating the cause of deterioration of fuel consumption in each driving scene is associated with each driving scene. And recorded in advance on the recording medium 30 (not shown).

Therefore, the control unit 20 specifies voice data to be output from information indicating the traveling scene associated with the deteriorated section to be guided, and the distance between the current position of the vehicle and the position of the deteriorated section to be guided is predetermined. When the distance is less than or equal to the distance, the audio data is output to the user I / F unit 44. As a result, guidance for eliminating the cause of deterioration in the deteriorated section to be guided is output.

FIG. 5A shows an example of a map displayed on the display unit. In this example, an icon C indicating the current position of the vehicle is displayed on the road R indicated by the solid curve. In the example shown in FIG. 5A, the fuel economy evaluation is displayed by an icon imitating a leaf on the road, and the current evaluation of “good” by the solid line icon Etg and the icon Etb with a solid line hatch. Shows the current evaluation of “Evil”, and the past evaluation of “Good” is indicated by the broken line icon Epg, and the past evaluation of “Evil” is indicated by the icon Epb indicated by the broken line hatch (the past evaluation indicating that it is a deteriorated section). ing. In addition, the thick line described on the road R has shown the driving | running | working driving | running route | path for reaching from the departure place to the destination in this driving | running | working.

Furthermore, FIG. 5A is an example in the case where there is a deterioration zone Z _{1 in} which a cause of deterioration in the deceleration scene has occurred in front of the current position of the vehicle, and the vehicle approaches the deterioration zone Z ₁ . In this example, when the distance between the current position of the vehicle and the position of the deterioration zone Z ₁ is equal to or less than a predetermined distance, the control unit 20 uses “slow deceleration” as voice guidance for eliminating the cause of the deterioration of the deceleration scene. Voice guidance (symbol A shown in FIG. 5A) is output to the speaker of the user I / F unit 44. As a result, it is possible for the driver to recognize the cause of deterioration at the stage where driving for eliminating the cause of deterioration should be performed, and the driver can easily eliminate the cause of fuel consumption deterioration. Is possible.

In addition, when the vehicle approaches the deteriorated section to be guided, guidance corresponding to the cause of the deterioration is performed, so whether or not the cause of the deterioration reoccurs when the vehicle reaches the deteriorated section. The person himself can easily judge. Therefore, it can be easily determined whether or not the driving operation for eliminating the cause of the deterioration should be performed. For example, in the past travel, it is assumed that a cause of deterioration in fuel consumption occurs when the vehicle is decelerated in response to the signal indicated by the traffic light being red. In this case, if the signal indicated by the traffic light is red and needs to be decelerated during the current travel, the driver can determine that the driver should drive to eliminate the cause of the deterioration. If the signal indicated by the traffic light is blue and there is no need to decelerate this time, there is no need to drive to eliminate the cause of the deterioration.

In the present embodiment, in order to prevent guidance that is difficult to understand for the driver during driving by performing guidance corresponding to the cause of deterioration in each worsening section when the worsening sections are continuous. When the deterioration sections are continuous, the control unit 20 performs the guidance corresponding to the permutation of the deterioration causes of the continuous deterioration sections by the processing of the deterioration cause guide section 21c. That is, the control unit 20 determines that the unit section is a deteriorated section in the process of determining whether or not a unit section adjacent to the deteriorated section to be guided is adjacent to the front of the planned travel route. Continue until it runs out. As a result, the deterioration section which continues ahead from the deterioration section used as guidance object is specified.

Further, the control unit 20 acquires information indicating a traveling scene corresponding to the cause of deterioration in each of the deteriorated sections that are continuous after the deteriorated section that is a guidance target (details will be described later). In the present embodiment, when the cause of deterioration occurs in each permutation with respect to the permutation of the driving scene corresponding to the cause of deterioration, the audio data for outputting voice guidance for eliminating these causes of deterioration is recorded on the recording medium 30. (Not shown).

Therefore, the control unit 20 specifies audio data associated with the permutation of information indicating the travel scene, and when the distance between the current position of the vehicle and the position of the deteriorated section of the guidance target is equal to or less than a predetermined distance. The audio data is output to the user I / F unit 44. As a result, a guide for eliminating the complex cause of deterioration corresponding to the permutation of the cause of deterioration in the consecutive deteriorated sections is output.

In the example shown in FIG. 5A, all the past evaluations of the unit sections existing in the section Z ₂ are “bad”. Therefore, deterioration section are continuous in the section Z _2. In this case, the control unit 20 acquires information indicating the traveling scene corresponding to the deterioration caused for all deterioration section existing section Z _2, to identify the voice data associated with the permutation information indicating a running scene . Then, the control unit 20, when the distance between the current position of the vehicle worse certain section foremost along the planned driving route of the section Z ₂ is a predetermined distance or less, the deterioration section are continuous Voice guidance for eliminating the cause of the deterioration is output to the speaker of the user I / F unit 44. In the example shown in FIG. 5A, as an example in which the permutation of information indicating the driving scene is a “deceleration” scene, a “start” scene, and an “acceleration” scene, “Let's keep a gentle stop and start” The example of the voice guidance (code | symbol B) is shown.

As described above, in the present embodiment, when other deteriorated sections are continuously present in the deteriorated section to be guided, a configuration is provided that performs guidance corresponding to the permutation of the cause of deterioration in the consecutive deteriorated sections. Adopted. Therefore, it is possible to transmit to the driver the cause of deterioration in consecutive deterioration sections without performing guidance corresponding to the cause of deterioration in all the deterioration sections. Therefore, as the section Z ₂ shown in FIG. 5A, even when the number of worsening sections are continuous is often able to prevent the guide it is complicated, the driver for the fuel efficiency improvement The instructions can be easily understood. In addition, because it is configured to provide guidance corresponding to the permutation of the cause of deterioration in consecutive deteriorated sections, the cause of deterioration of fuel economy that occurs in a chain (the situation in which the cause of deterioration later is caused by the previous cause of deterioration) is eliminated. Can be effectively transmitted to the driver.

(2) Evaluation information acquisition process:
Next, the evaluation information acquisition process will be described in detail. FIG. 2 is a flowchart of the evaluation information acquisition process. In the present embodiment, the control unit 20 executes the evaluation information acquisition process by the current travel history acquisition unit 21a after the start of the travel with the destination set. Before the evaluation information acquisition process is executed, the control unit 20 determines the cumulative distance for determining whether or not the vehicle has traveled a certain distance defined as the length of the unit section, and the distance that the vehicle has traveled economically. A variable indicating an economic travel distance for identifying the vehicle and an uneconomic travel distance for identifying the distance the vehicle did not travel economically is initialized. The uneconomic mileage is defined for each driving scene. The uneconomical mileage in the start scene, the uneconomic mileage in the acceleration scene, the uneconomic distance in the cruise (acceleration) scene, and the uneconomic in the deceleration scene. The travel distance, the uneconomic travel distance in the cruise (deceleration) scene, and the uneconomic distance in the high speed travel scene are defined.

When the evaluation information acquisition process is executed, the control unit 20 acquires the vehicle speed, acceleration, and current position of the vehicle (step S100). That is, the control unit 20 specifies the vehicle speed based on the output information of the vehicle speed sensor 42, and acquires the acceleration based on the time change of the vehicle speed. Furthermore, the control unit 20 acquires the current position of the vehicle based on output signals from the GPS receiving unit 41, the vehicle speed sensor 42, and the gyro sensor 43. As a result, the vehicle speed and acceleration for each position of the vehicle are specified.

Next, the control unit 20 adds the travel distance to the cumulative distance (step S105). In this embodiment, steps S100 to S180 are a loop process, and when the loop process is repeated, the process of step S100 is performed every certain period (for example, 100 ms). Therefore, based on the output signals from the GPS receiver 41, the vehicle speed sensor 42, and the gyro sensor 43, the control unit 20 travels from the previous step S100 to the current step S100. The travel distance ΔL is specified and added to the cumulative distance. That is, the control unit 20 performs an addition process so that a value indicating the total distance traveled by the vehicle while the steps S100 to S180 are repeated becomes the cumulative distance.

Next, the control unit 20 determines whether or not a cause of deterioration in the start scene has occurred (step S110). If it is not determined that the cause of deterioration in the start scene has occurred, step S115 is skipped. On the other hand, when it is determined in step S110 that the cause of deterioration in the start scene has occurred, the control unit 20 adds the travel distance to the uneconomic travel distance in the start scene (step S115). That is, the above-mentioned travel distance ΔL added to the cumulative distance in step S105 is added to the uneconomic travel distance in the start scene.

In step S110, it is only necessary to be able to determine whether or not a driving operation has been performed in the start scene so that the fuel efficiency when starting the vehicle is worse than the standard fuel efficiency. In the present embodiment, The said determination is implemented based on the determination conditions prescribed | regulated previously about the vehicle speed. That is, if excessive acceleration is performed when starting the vehicle, energy is wasted. Therefore, in a start scene where the vehicle speed of a vehicle that can be regarded as being stopped increases, it is possible to employ a configuration that determines that the cause of deterioration in the start scene has occurred when the vehicle speed changes rapidly. Specifically, a threshold that increases with the elapsed time after starting is set for each time, and it is determined that a cause of deterioration in the starting scene has occurred when the vehicle speed at each time exceeds the threshold in the initial stage after starting. It is possible to adopt a configuration or a configuration in which it is determined that a cause of deterioration in the start scene has occurred when a change in vehicle speed per unit time exceeds a predetermined threshold.

Next, the control unit 20 determines whether or not a cause of deterioration in the acceleration scene has occurred (step S120). If it is not determined that the cause of deterioration in the acceleration scene has occurred, step S125 is skipped. On the other hand, when it is determined in step S120 that the cause of deterioration in the acceleration scene has occurred, the control unit 20 adds the travel distance to the uneconomic travel distance in the acceleration scene (step S125). That is, the above travel distance ΔL added to the cumulative distance in step S105 is added to the uneconomic travel distance in the acceleration scene.

In step S120, it is only necessary to determine whether or not a driving operation in which the fuel efficiency when accelerating the vehicle is worse than the reference fuel efficiency has been performed in the acceleration scene. In the present embodiment, The said determination is implemented based on the determination conditions prescribed | regulated previously about vehicle speed and acceleration. That is, if excessive acceleration is performed when the vehicle is accelerated, energy is wasted. Further, when comparing the state in which the vehicle is traveling at a high speed and the state in which the vehicle is traveling at a low speed, the former requires fewer scenes than the latter. Therefore, a threshold value that decreases as the vehicle speed increases is defined in advance. In an acceleration scene in which the vehicle speed increases (excluding acceleration from a stop state), if the acceleration exceeds the threshold value, It is possible to adopt a configuration that determines that the cause of deterioration has occurred. The threshold value may change continuously as the vehicle speed increases or may change stepwise.

Next, the control unit 20 determines whether or not a cause of deterioration due to acceleration has occurred in the cruise scene (step S130). If it is not determined that the cause of deterioration due to acceleration has occurred in the cruise scene, step S135 is performed. skip. On the other hand, when it is determined in step S130 that the cause of deterioration due to acceleration has occurred in the cruise scene, the control unit 20 adds the travel distance to the uneconomic travel distance in the cruise scene (step S135). That is, the above-mentioned travel distance ΔL added to the cumulative distance in step S105 is added to the uneconomic travel distance in the cruise (acceleration) scene. The cruise scene is a scene in which the vehicle continues to travel at a certain range of vehicle speeds.

Further, in step S130, it is only necessary to determine whether or not an acceleration operation has been performed in the cruise scene so that the fuel efficiency when the vehicle travels is worse than the reference fuel efficiency. The said determination is implemented based on the determination conditions prescribed | regulated previously about vehicle speed and acceleration. That is, if excessive acceleration is performed when the vehicle is cruising, energy is wasted. Therefore, the control unit 20 determines based on the vehicle speed whether or not the vehicle continues the cruise traveling in which the vehicle travels at a certain range of vehicle speeds. If the vehicle continues the cruise traveling, the acceleration is further determined in advance. It is possible to adopt a configuration that determines that the cause of deterioration in the cruise scene occurs when the threshold is exceeded. Note that in the cruise scene, not only excessive acceleration but also excessive deceleration causes deterioration of fuel consumption. Therefore, in steps S130 and S135 of FIG. 2, it is determined that the vehicle has been accelerated in the cruise scene. Therefore, it is described as a cruise (acceleration) scene, and in S150 and S155, it is described as a cruise (deceleration) scene in order to indicate that it is determined that the vehicle has been decelerated in the cruise scene.

Next, the control unit 20 determines whether or not a cause of deterioration in the deceleration scene has occurred (step S140). If it is not determined that the cause of deterioration in the deceleration scene has occurred, step S145 is skipped. On the other hand, when it is determined in step S140 that the cause of deterioration in the deceleration scene has occurred, the control unit 20 adds the travel distance to the uneconomic travel distance in the deceleration scene (step S145). That is, the above-mentioned travel distance ΔL added to the cumulative distance in step S105 is added to the uneconomic travel distance in the deceleration scene.

Further, in step S140, it is only necessary to determine whether or not a driving operation in which the fuel consumption when the vehicle is decelerated is worse than the reference fuel consumption has been performed in the deceleration scene. The said determination is implemented based on the determination conditions prescribed | regulated previously about vehicle speed and acceleration. That is, when excessive deceleration is performed when the vehicle is decelerated, the acceleration for reaching the vehicle speed before deceleration is useless. Further, when comparing a state where the vehicle is traveling at a high speed and a state where the vehicle is traveling at a low speed, a large amount of energy is wasted when the former is decelerated excessively than the latter. Therefore, a negative acceleration, which is an acceleration for decelerating, is defined in advance as a threshold value that increases as the vehicle speed increases (the absolute value decreases in the negative range). In a deceleration scene where the vehicle speed of the vehicle decreases, the acceleration is reduced. It is possible to adopt a configuration that determines that the cause of deterioration in the deceleration scene has occurred when the value is below the threshold. The threshold value may change continuously as the vehicle speed increases or may change stepwise.

Next, the control unit 20 determines whether or not a cause of deterioration due to deceleration has occurred in the cruise scene (step S150). If it is not determined that the cause of deterioration due to deceleration has occurred in the cruise scene, step S155 is performed. skip. On the other hand, when it is determined in step S150 that the cause of deterioration due to deceleration has occurred in the cruise scene, the control unit 20 adds the travel distance to the uneconomic travel distance in the cruise scene (step S155). That is, the above travel distance ΔL added to the cumulative distance in step S105 is added to the uneconomic travel distance in the cruise (deceleration) scene.

In step S150, it is only necessary to determine whether or not a deceleration operation has been performed in the cruise scene so that the fuel efficiency when the vehicle is traveling is worse than the reference fuel efficiency. In the present embodiment, The said determination is implemented based on the determination conditions prescribed | regulated previously about vehicle speed and acceleration. That is, if the vehicle is excessively decelerated when cruising, the energy for accelerating to the speed before deceleration is wasted. Therefore, the control unit 20 determines based on the vehicle speed whether or not the vehicle continues the cruise traveling in which the vehicle travels at a certain range of vehicle speeds. If the vehicle continues the cruise traveling, the acceleration is further determined in advance. It is possible to adopt a configuration that determines that the cause of the deterioration in the cruise scene has occurred when the threshold is below the threshold.

Next, the control unit 20 determines whether or not a cause of deterioration in the high-speed driving scene has occurred (step S160). If it is not determined that the cause of deterioration in the high-speed driving scene has occurred, step S165 is skipped. . On the other hand, when it is determined in step S160 that the cause of deterioration in the high-speed travel scene has occurred, the control unit 20 adds the travel distance to the uneconomic travel distance in the high-speed travel scene (step S165). That is, the above travel distance ΔL added to the cumulative distance in step S105 is added to the uneconomic travel distance in the high speed travel scene.

In step S160, it is only necessary to determine whether or not a driving operation in which the fuel efficiency when the vehicle is traveling is worse than the standard fuel efficiency is performed in a high-speed driving scene. The determination is performed based on the determination condition defined in advance for the vehicle speed. That is, if the vehicle speed is excessively increased, energy is excessively consumed. Therefore, the control unit 20 can employ a configuration that determines that the cause of deterioration in the high-speed traveling scene has occurred when the vehicle speed of the vehicle exceeds a predetermined threshold.

Next, the control unit 20 determines whether or not a cause of deterioration has occurred (step S170). That is, when none of the causes of deterioration in each traveling scene as determined in steps S110 to S160 has occurred, the control unit 20 deteriorates in the process of traveling the traveling distance ΔL acquired in step S105. It is assumed that the cause did not occur. For this reason, the control part 20 considers that the cause of deterioration did not occur when the uneconomical travel distance of each travel scene is not added in steps S115, S125, S135, S145, S155, and S165. When it is determined in step S170 that the cause of deterioration has not occurred (S170: Y), the control unit 20 adds the travel distance to the economic travel distance (step S175). That is, the above-mentioned travel distance ΔL added to the cumulative distance in step S105 is added to the economic travel distance. On the other hand, when it is not determined in step S170 that the cause of deterioration has not occurred (S170: N), step S175 is skipped.

Next, the control unit 20 determines whether or not the cumulative distance is equal to or greater than a certain distance (step S180), and performs the processing after step S100 until it is determined in step S180 that the cumulative distance is equal to or greater than the certain distance. repeat. In other words, the control unit 20 considers that the vehicle has traveled the unit section when the cumulative distance is equal to or greater than a predetermined distance defined as the distance of the unit section, and exits the loop processing of steps S100 to S180. Become.

If it is determined in step S180 that the cumulative distance has become equal to or greater than a certain distance, the control unit 20 sets the economic travel ratio to economic travel distance / cumulative distance (step S185). Next, the control unit 20 records the economic travel ratio and the uneconomic travel distance for each travel scene on the recording medium 30 as the evaluation information 30b in association with the unit section for which the cumulative distance is measured (step S190). . According to the above processing, the evaluation information 30b for each unit section can be recorded on the recording medium 30. When the evaluation information acquisition process is executed with the vehicle destination set, in step S190, the control unit 20 records information indicating the destination and the departure location in association with the evaluation information 30b. .

(3) Evaluation information display processing:
Next, the evaluation information display process will be described in detail. FIG. 3 is a flowchart of the evaluation information display process. In the present embodiment, the destination is set by the driver, and the past starting point and the destination that are the same as the starting point and the destination of the current travel are past. The evaluation information display process is executed when the evaluation information 30b regarding travel exists. Moreover, the control part 20 is updating the map display for every predetermined period in the display part of the user I / F part 44, and the said evaluation information display process is performed for every said update.

Steps S200 to S230 are loop processing for displaying past evaluations on a map, and the control unit 20 first processes the display of past evaluations by processing of the deterioration cause guide unit 21c and the past travel history acquisition unit 21b. A target unit section is selected (step S200). That is, the control unit 20 specifies the range of the map displayed on the display unit of the user I / F unit 44 by the process of the deterioration cause guidance unit 21c. Further, the control unit 20 extracts the evaluation information 30b associated with the same starting point and destination as the starting point and destination in the current driving by the processing of the past driving history acquisition unit 21b. Furthermore, the control unit 20 is included in the range of the map displayed on the display unit of the user I / F unit 44 from the unit section associated with the extracted evaluation information 30b by the process of the deterioration cause guidance unit 21c. A unit section is specified as a display target. Then, a unit section that has not been subjected to the process of displaying the past evaluation is selected from the unit sections to be displayed as the unit section to be processed.

Next, the control unit 20 acquires the past evaluation information of the unit section to be processed by the process of the past travel history acquisition unit 21b (step S205). That is, the economic travel ratio in the past travel of the unit section to be processed is acquired. Next, the control unit 20 determines whether or not the economic travel ratio in the past travel of the unit section to be processed is equal to or greater than a predetermined threshold by the process of the past travel history acquisition unit 21b (step S210). When it is determined in step S210 that the economic travel ratio is equal to or greater than the predetermined threshold, the control unit 20 sets the past evaluation of the unit section to be processed to “good” by the process of the past travel history acquisition unit 21b ( Step S215). If it is not determined in step S210 that the economic travel ratio is equal to or greater than the predetermined threshold, the control unit 20 sets the past evaluation of the unit section to be processed to “bad” by the process of the past travel history acquisition unit 21b. (Step S220). The predetermined threshold compared with the economic travel ratio is the above-described predetermined evaluation level.

Next, the control unit 20 displays the past evaluation of the unit section to be processed by the process of the deterioration cause guiding unit 21c (step S225). That is, the control unit 20 outputs a signal for drawing an icon corresponding to the past evaluation of the unit interval to be processed to the display unit of the user I / F unit 44. As a result, the display unit of the user I / F unit 44 displays an icon corresponding to the past evaluation of the unit section to be processed. Note that the unit section determined as “bad” in step S220 is a deteriorated section.

Next, the control unit 20 determines whether or not the past evaluation of the unit section to be displayed has been displayed by the process of the deterioration cause guiding unit 21c (step S230). That is, the control unit 20 determines whether or not the past evaluation has been displayed for all the display target unit sections specified in step S200. If it is not determined in step S230 that the past evaluation of the unit section to be displayed has been displayed, the processes in and after step S200 are repeated. On the other hand, when it is determined in step S230 that the past evaluation of the unit section to be displayed has been displayed, processing for displaying the current evaluation is performed in step S235 and subsequent steps. When the past evaluation of the unit section to be displayed is displayed, the solid line icons Etg and Etb (icons indicating the current evaluation) shown in FIG. 5A are not displayed, and the icons Epg and Epb (showing the past evaluations) indicated by broken lines are not displayed. Icon) is displayed. In addition, when the route is the same for the current travel and the past travel, the past evaluation is also displayed in the unit section behind the current position of the vehicle. However, the processing after step S235 is performed on the same unit section. When the current evaluation is displayed, the current evaluation is preferentially displayed.

Steps S235 to S265 are a loop process for displaying the current evaluation on a map, and the control unit 20 first processes from the display target of the current evaluation by the processes of the deterioration cause guiding unit 21c and the current travel history acquiring unit 21a. A target unit section is selected (step S235). That is, the control unit 20 specifies the range of the map displayed on the display unit of the user I / F unit 44 by the process of the deterioration cause guidance unit 21c. Further, the control unit 20 causes the display of the user I / F unit 44 to display the unit section associated with the evaluation information 30b recorded on the recording medium in the course of the current travel by the process of the current travel history acquisition unit 21a. A unit section included in the range of the displayed map is specified as a display target. Then, a unit section for which the process for displaying the current evaluation is not performed is selected from the unit sections to be displayed as the unit section to be processed.

Next, the control unit 20 acquires the current evaluation information of the unit section to be processed by the process of the current travel history acquisition unit 21a (step S240). That is, the economic travel ratio in the current travel of the unit section to be processed is acquired. Next, the control unit 20 determines whether or not the economic travel ratio in the current travel of the unit section to be processed is greater than or equal to a predetermined threshold by the process of the current travel history acquisition unit 21a (step S245). When it is determined in step S245 that the economic travel ratio is equal to or greater than the predetermined threshold, the control unit 20 sets the current evaluation of the unit section to be processed to “good” by the process of the current travel history acquisition unit 21a ( Step S250). If it is not determined in step S245 that the economic travel ratio is equal to or greater than the predetermined threshold, the control unit 20 sets the current evaluation of the unit section to be processed to “bad” by the process of the current travel history acquisition unit 21a. (Step S255). Note that the predetermined threshold compared with the economic travel ratio is the same as the predetermined threshold in step S210.

Next, the control unit 20 displays the current evaluation of the unit section to be processed by the process of the deterioration cause guiding unit 21c (step S260). That is, the control unit 20 outputs a signal for drawing an icon corresponding to the current evaluation of the unit interval to be processed to the unit interval to the display unit of the user I / F unit 44. As a result, the display unit of the user I / F unit 44 displays an icon corresponding to the current evaluation of the unit section to be processed.

Next, the control unit 20 determines whether or not the current evaluation of the unit section to be displayed has been displayed by the process of the deterioration cause guiding unit 21c (step S265). That is, the control unit 20 determines whether or not the current evaluation has been displayed for all of the display target unit sections identified in step S235. If it is not determined in step S265 that the current evaluation of the unit section to be displayed has been displayed, the processes in and after step S235 are repeated. On the other hand, when it is determined in step S265 that the current evaluation of the unit section to be displayed has been displayed, the control unit 20 ends the evaluation information display process. In the present embodiment, when the current evaluation is displayed on the same unit section, the current evaluation is preferentially displayed. Therefore, when the current evaluation of the unit section to be displayed is displayed, FIG. 5A shows. As in the example, the evaluation icons Etg and Etb are displayed with solid lines in the section where the vehicle traveled before the current position of the vehicle. In addition, since the current evaluation is not displayed in the section ahead of the current position of the vehicle in the processing of steps S235 to S265, the past evaluation icons Epg and Epb are displayed in broken lines in the section ahead of the current position of the vehicle. Is done.

(4) Deterioration cause guidance processing:
Next, the deterioration cause guidance process will be described in detail. FIG. 4 is a flowchart of the deterioration cause guidance process. In the present embodiment, the control unit 20 executes the deterioration cause guidance process by the process of the deterioration cause guidance unit 21c after the evaluation information display process is completed. When the execution of the deterioration cause guidance process is started, the control unit 20 measures the number of different deterioration causes existing in the continuous deterioration section, and an array [number of deterioration causes, Cause of deterioration] and section numbers for identifying consecutive deterioration sections are initialized (S300). Here, the initial value of the array [number of causes of deterioration, cause of deterioration] is [0, 0], and the initial value of the section number is 1. In addition, the initial section number 1 is a number indicating a deteriorated section to be guided, and the section number n (n is a natural number of 2 or more) is the planned travel route of the vehicle with respect to the section number n-1. Is a number indicating a unit section adjacent forward.

Next, the control unit 20 acquires a deteriorated section to be guided (step S305). That is, the control unit 20 refers to the map information 30a, and detects a deteriorated section that exists ahead of the current position of the vehicle along the planned travel route and whose past evaluation is worse than a predetermined evaluation level. And the deterioration area nearest to the current position of the vehicle is specified as the guidance target. Next, the control part 20 determines whether it is below a predetermined distance to the deterioration area of guidance object (step S310). That is, the control unit 20 specifies the distance between the position of the deteriorated section to be guided and the current position of the vehicle, and determines whether the distance is equal to or less than a predetermined distance. In step S310, the control unit 20 stands by until it is determined that the distance to the guidance target deterioration section is equal to or less than the predetermined distance. The process after S315 is executed.

Next, the control unit 20 acquires the cause of the deterioration in the guidance target deterioration section (step S315). That is, the control unit 20 refers to the evaluation information 30b of the deteriorated section, and specifies the uneconomic travel distance for each travel scene. The uneconomical travel distance of the travel scene indicates, for each travel scene, the cumulative distance that the vehicle traveled in the deteriorated section in a state where the cause of deterioration occurred in each travel scene. Therefore, the control unit 20 compares the uneconomic travel distance for each travel scene and selects the travel scene with the longest distance. And the control part 20 considers that the cause of deterioration in the selected driving | running | working scene is the cause of deterioration of the said deterioration area.

Next, the control unit 20 increments the number of causes of deterioration in the above-described array, and updates the array by substituting the numerical value indicating the cause of deterioration acquired in step S315 for the cause of deterioration (step S320). That is, when the deteriorated section to be guided is specified in step S310 after the determination in step S305, the number of causes of deterioration is set to 1 in the array. In addition, a numerical value indicating the cause of deterioration corresponding to the first number of causes of deterioration is substituted into the array. The numerical value indicating the cause of deterioration may be determined in advance for each driving scene. Here, the numerical values indicating the start scene, the acceleration scene, the cruise (acceleration) scene, the deceleration scene, the cruise (deceleration) scene, and the high-speed driving scene, respectively. An example in which is 1, 2, 3, 4, 5, 6 will be described.

Next, the control unit 20 increments the section number (step S325) and determines whether the unit section indicated by the section number is a deteriorated section (step S330). That is, it is determined whether or not a unit section adjacent to the unit section that has been processed immediately before the planned traveling route is a deteriorated section. In Step S330, when it is determined that the unit section indicated by the section number is a deteriorated section, the control unit 20 performs the processes after Step S335 in order to perform the process when the deteriorated sections are continuous. On the other hand, when it is not determined in step S330 that the unit section indicated by the section number is a deteriorated section, the control unit 20 performs the processes after step S350 without performing the process when the deteriorated sections are continuous.

5B, 5C, and 5D show examples in which past evaluations are displayed in the unit intervals Z _p1 to Z _p5 . In the example shown in FIG. 5B, the unit intervals Z _p1 to Z _p5 are the deterioration intervals. In the example shown in FIG. 5C, the unit interval Z _p1 is the deterioration interval, and the unit intervals Z _p2 to Z _p5 are not the deterioration intervals. In the example shown in FIG. 5D, the unit sections Z _p1 and Z _p2 are deterioration sections, and the unit sections Z _p3 to Z _p5 are not deterioration sections. In the example shown in FIG 5B, when the vehicle approaches the deterioration interval Z _p1, deterioration section Z _p1 in step S305 it is obtained as deterioration section of the guide target, deterioration in deterioration due to deceleration scene worsening interval Z _p1 in step S315 Acquired to be the cause. As a result, in step S320, the number of causes of deterioration is set to 1, and 4 indicating a deceleration scene is substituted for the cause of deterioration. The section number in step S325 is 2, unit sections Z _p2 is section number 2 in step S330 is determined to be deteriorated section. Therefore, in the example shown in FIG. 5B, the process after step S335 is performed in order to perform the process in the case where the deterioration sections are continuous. Also in the example shown in FIG. 5D, the evaluation and the cause of deterioration of the unit sections Z _p1 and Z _p2 are the same as those in FIG. 5B. Therefore, when the vehicle approaches the deterioration section Z _p1 , the number of cause of deterioration is set to 1. After the 4 indicating the deceleration scene is assigned, the section number is set to 2, and the processes after step S335 are executed to perform the process when the deteriorated sections are continuous.

On the other hand, in the example shown in FIG. 5C, when the vehicle approaches the deterioration interval Z _p1, deterioration section Z _p1 is obtained as deterioration section guide target in step S305, in worse due to deceleration scene worsening interval Z _p1 in step S315 Acquired to be the cause of deterioration. As a result, in step S320, the number of causes of deterioration is set to 1, and 4 indicating a deceleration scene is substituted for the cause of deterioration. In step S325, the section number is set to 2. In step S330, it is determined that the unit section Z _p2 that is the section number 2 is not a deterioration section. Therefore, in the example shown in FIG. 5C, the process after step S350 is performed without performing the process in the case where the deterioration sections are continuous.

Next, the processing after step S335 will be described. In this process, the control unit 20 acquires the cause of deterioration of the unit section indicated by the section number (step S335). That is, the control unit 20 refers to the evaluation information 30b of the deteriorated section indicated by the section number, and specifies the uneconomic travel distance for each travel scene. Further, the control unit 20 compares the uneconomic travel distance for each travel scene, and selects the travel scene having the longest uneconomic travel distance. And the control part 20 considers that the cause of deterioration in the selected driving | running | working scene is the cause of deterioration of the said deterioration area.

Next, the control unit 20 determines whether or not the cause of deterioration is the same in the unit section indicated by the section number and the unit section indicated by the section number −1 (step S340). That is, the control unit 20 determines whether or not the cause of deterioration is the same in adjacent unit sections. In step S340, if it is not determined that the cause of deterioration is the same in the unit section indicated by the section number and the unit section indicated by section number-1, the control unit 20 increments the number of cause of deterioration in the above-described arrangement, The array is updated by substituting the numerical value indicating the cause of deterioration acquired in step S335 for the cause of deterioration (step S345). That is, when the cause of deterioration differs between adjacent unit sections, the number of cause of deterioration increases by 1 in the array, and a numerical value indicating a new cause of deterioration is substituted into the array.

On the other hand, if it is determined in step S340 that the cause of deterioration is the same in the unit section indicated by the section number and the unit section indicated by section number-1, the control unit 20 skips step S345. That is, when the cause of deterioration is the same in adjacent unit sections, the array is not updated. Then, after the process of step S340 or step S345, the processes after step S325 are repeated. That is, the section number is incremented in step S325, and the processes in and after step S335 are repeated until it is not determined in step S330 that the unit section indicated by the section number is a deteriorated section. For this reason, the process for updating the arrangement is repeated until the unit section is no longer a deteriorated section in front of the deteriorated section to be guided.

Specifically, in the example shown in FIG. 5B, if step S335 is executed in a state where the section number is 2, it is considered that the cause of deterioration in the deceleration scene has occurred, and in step S340, section number 2 indicates. It is determined that the cause of deterioration is the same for both the unit section Z _p2 and the unit section Z _p1 indicated by section number 1 (both are causes of deterioration in the deceleration scene).

On the other hand, in the example shown in FIG. 5B, if step S335 is executed in a state where the section number is 3, it is considered that the cause of deterioration in the start scene has occurred, and in step S340, the unit section Z indicated by section number 3 is displayed. _It is determined that the cause of deterioration is not the same between _p3 and the unit section _Zp2 indicated by section number 2 (the unit section _Zp2 is a deceleration scene and the unit section _Zp3 is a cause of deterioration in the start scene). Therefore, in this case, the array is updated, the number of causes of deterioration is incremented to 2, and 1 indicating the start scene is substituted for the cause of deterioration. As a result, [1, 4] and [2, 1] are assigned to the array. The above process is repeated until it is determined in step S330 that the unit section indicated by the section number is not a deteriorated section. As a result, in the example shown in FIG. 5B, the array is [1, 4], [2, 1] and [3, 2] are substituted, and the processing after step S350 is executed.

In the example shown in FIG. 5D, when step S335 and subsequent steps are executed in a state where the section number is 2, the array is not updated as in FIG. 5B. And when the section number becomes 3 in the example shown in FIG. 5D, it is determined in step S330 that the unit section indicated by the section number is not a deteriorated section, and thus the step is performed with [1, 4] assigned to the array. The processing after S350 is executed. In the example shown in FIG. 5C, after defining the array as [1,4] in step S320 for the deteriorated section to be guided, if the section number is set to 2 in step S325, the section number is shown in step S330. Since it is determined that the unit section is not a deterioration section, the processing after step S350 is executed in a state where [1, 4] is assigned to the array. That is, in both the example shown in FIG. 5C and the example shown in FIG. 5D, the values of the array when executing the processing after step S350 are [1, 4], which are the same.

In step S350, the control unit 20 determines whether or not the deterioration cause number is 1 with reference to the array. When it is determined in step S350 that the number of cause of deterioration is 1, the control unit 20 guides advice corresponding to the cause of deterioration in the deteriorated section to be guided (step S355). That is, as in the example shown in FIG. 5C, when the unit section adjacent to the front of the deterioration target section is not a deterioration section, or in the front of the deterioration target section as in the example shown in FIG. 5D. In the case where only the deteriorated sections having the same cause of deterioration are continuous, the control unit 20 guides advice corresponding to the cause of deterioration of the deteriorated section to be guided. For this purpose, the control unit 20 specifies the audio data corresponding to the cause of deterioration by selecting the audio data corresponding to the numerical value indicating the cause of deterioration assigned to the array, and specifies the audio data as the user I / F unit. 44 for output. As a result, voice guidance for eliminating the cause of deterioration in the deteriorated section of the guidance target is output from the speaker.

In the present embodiment, when the cause of deterioration is the same in all of the continuous deterioration sections as in the example shown in FIG. 5D, the deterioration of the deterioration section closest to the vehicle in the continuous deterioration sections. It is configured to provide guidance corresponding to the cause. In other words, if the cause of deterioration is the same in all of the deterioration sections that are continuous after that, starting with the deterioration section that is the target of guidance, it is configured to perform guidance corresponding to the cause of deterioration once, It is possible to prevent the cause of the deterioration from being sequentially guided for each deterioration section, and provide easy-to-understand guidance.

Table 1 is an example showing the contents of voice guidance for each traveling scene.

As shown in Table 1, when the cause of deterioration in the start scene occurs, the control unit 20 says “Let's keep a gentle start” in order to prevent excessive acceleration in the start scene from reoccurring. The voice of the guidance content is output. When the cause of the deterioration in the acceleration scene has occurred, the control unit 20 outputs the voice of the guidance content “Let's keep moderate acceleration” in order to prevent excessive acceleration in the acceleration scene from recurring. When the cause of the deterioration in the deceleration scene has occurred, the control unit 20 sounds the guidance content “Let's keep slow deceleration in mind” so as not to recur excessive acceleration performed before the deceleration scene. Is output. If there is a cause of deterioration in the cruise (acceleration, deceleration) scene, in order to avoid recurring excessive acceleration in the cruise (acceleration) scene or excessive acceleration performed before the cruise (deceleration) scene, The control unit 20 outputs a voice of guidance content “Let's keep driving at a constant speed”. When the cause of the deterioration in the high-speed driving scene has occurred, the control unit 20 outputs the voice of the guidance content “Let's keep driving at a reduced speed” so as not to drive at an excessive vehicle speed.

On the other hand, when it is not determined in step S350 that the number of cause of deterioration is 1, the control unit 20 guides advice corresponding to the permutation of the cause of deterioration (step S360). That is, as in the example illustrated in FIG. 5B, when at least two deterioration causes occur in successive deterioration sections, the control unit 20 guides advice corresponding to the permutation of deterioration causes. For this purpose, the control unit 20 selects the audio data corresponding to the permutation of the numerical values indicating the cause of deterioration assigned to the array, thereby specifying the audio data corresponding to the cause of deterioration, and the audio data is designated as user I / Output to the F unit 44. As a result, voice guidance for eliminating the cause of deterioration in the deteriorated section of the guidance target is output from the speaker. For example, in the example shown in FIG. 5B, the permutations of the numerical values indicating the cause of deterioration are 4, 1, and the control unit 20 selects the audio data corresponding to the permutation.

As shown in the example shown in FIG. 5B, when there are adjacent deterioration sections that are the same cause of deterioration, the number of cause of deterioration of the sequence does not increase even if the section number is increased. The cause of the deterioration is integrated so that one is counted as one. That is, in the case where the deterioration causes of the adjacent deterioration sections are the same among the deterioration sections that are continuous after the deterioration section to be guided, the deterioration causes of the adjacent deterioration sections are integrated, and the deterioration causes are permuted. Is defined.

Table 2 is an example showing the contents of voice guidance for each traveling scene.

In Table 2, a permutation of running scenes is illustrated on the left side, and an example in which the number of causes of deterioration is 2 and 3 is shown. Of course, Table 2 is an example of a permutation, and it is possible to associate guide contents with any other permutation.

In the present embodiment, the guidance content corresponding to the permutation of the cause of deterioration is specified based on various guidelines. For example, if the cause of deterioration in the start scene and the cause of deterioration in the acceleration scene are continuous, the cause of deterioration in the start scene occurs due to excessive acceleration of the stopped vehicle, and excessive It is presumed that the cause of deterioration in the acceleration scene occurred due to continued acceleration. Therefore, by eliminating the cause of deterioration in the start scene, it is considered that the situation in which the cause of deterioration in the start scene and the cause of deterioration in the acceleration scene occur continuously is resolved, and the control unit 20 causes the cause of deterioration. Guidance is provided with guidance contents corresponding to the start scene, which is a travel scene that contributes to elimination. Specifically, the control unit 20 outputs a voice of guidance content “Let's keep a gentle start”.

When the cause of deterioration in the acceleration scene and the cause of deterioration in the deceleration scene are continuous, the cause of deterioration in the acceleration scene occurs due to excessive deceleration of the vehicle, and further deceleration is necessary due to the excessive acceleration. It is estimated that Therefore, the control unit 20 guides the user with guidance contents for preventing a situation in which such a plurality of deterioration cause permutations occur. Specifically, the control unit 20 outputs the voice of the guidance content “Let's refrain from unnecessary acceleration by looking at the previous situation”.

When the cause of deterioration in the acceleration scene and the cause of deterioration in the cruising (acceleration) scene are continuous, the cause of deterioration in the acceleration scene occurs due to excessive acceleration of the vehicle, and the cruise state is entered. It is presumed that the cause of deterioration in the cruise (acceleration) scene occurred due to continued excessive acceleration later. Therefore, the control unit 20 provides guidance with guidance contents that can eliminate both causes of deterioration. Specifically, the control unit 20 outputs the voice of the guidance content “Let's keep moderate acceleration”.

If the cause of deterioration in the deceleration scene and the cause of deterioration in the start-up scene are continuous, the cause of deterioration in the deceleration scene occurs due to excessive deceleration of the vehicle. It is presumed that the cause of deterioration in the start scene occurred due to acceleration. In this case, it is considered that the causal relationship between the previous cause of deterioration and the subsequent cause of deterioration is thin, and the control unit 20 guides the user with guidance contents that eliminate each cause of deterioration. Specifically, the control unit 20 outputs a voice of guidance content “Let's keep a gentle stop and start”. If the cause of deterioration in the deceleration scene and the cause of deterioration in the start-up scene are continuous, and if the cause of deterioration in the acceleration scene is continuous, the latter two causes of deterioration both suppress excessive acceleration. It will be solved. Therefore, in the example shown in Table 2, even when the cause of deterioration in the deceleration scene, the cause of deterioration in the start scene, and the cause of deterioration in the acceleration scene are continuous, the cause of deterioration in the deceleration scene, As in the case where the causes of deterioration continue, the voice of the guidance content “Let's keep a gentle stop and start” is output.

When the cause of deterioration in the deceleration scene and the cause of deterioration in the acceleration scene are continuous, the cause of deterioration in the deceleration scene occurred due to excessive deceleration of the vehicle, and the vehicle was excessively accelerated. Therefore, it is estimated that the cause of deterioration in the acceleration scene has occurred. Also in this case, it is considered that the causal relationship between the previous cause of deterioration and the cause of later deterioration is low, and the control unit 20 provides guidance with guidance contents that can eliminate each cause of deterioration. Specifically, the control unit 20 outputs a voice of guidance content “Let's keep moderate deceleration and acceleration in mind”.

When the cause of deterioration in the cruise (acceleration) scene and the cause of deterioration in the high-speed driving scene are continuous, the cause of deterioration in the cruise (acceleration) scene occurs due to excessive deceleration of the vehicle in the cruise driving state. As a result of the acceleration, it is presumed that the cause of deterioration in the high-speed driving scene occurred due to the driving at an excessive vehicle speed. Therefore, the control unit 20 provides guidance with guidance contents that can eliminate both causes of deterioration. Specifically, the control unit 20 outputs a voice of guidance content “Let's drive at a reduced speed”.

When the cause of deterioration in the high-speed driving scene and the cause of deterioration in the cruising (deceleration) scene are continuous, the vehicle was running at an excessive vehicle speed, causing a deterioration cause in the high-speed driving scene and suppressing the vehicle speed. It is presumed that the cause of deterioration in the cruise (deceleration) scene occurred due to excessive deceleration even in the cruise state. Therefore, the control unit 20 provides guidance with guidance contents that can eliminate both causes of deterioration. Specifically, the control unit 20 outputs a voice of guidance content “Let's drive at a reduced speed”.

In the present embodiment, when the deteriorated sections are continuous as shown in FIG. 5B, the voice guidance corresponding to the permutation of the cause of deterioration is executed, and the deterioration closest to the vehicle in the continuous deteriorated sections. The deteriorated section that continues ahead of the section is not set as a new guidance target. That is, in the configuration in which the deteriorated sections are sequentially guided from the deteriorated section closest to the vehicle in the current travel, if the deteriorated section is continuous, the deteriorated section closest to the vehicle in the consecutive deteriorated sections is set as the guide object. Others are not subject to guidance. As a result, when the deteriorated sections are continuous, it is possible to prevent each of the deteriorated sections that are continuous with the traveling of the vehicle from being sequentially guided.

(5) Other embodiments:
The above embodiment is an example for carrying out the present invention, and various other embodiments can be used as long as the cause of fuel consumption deterioration in the deteriorated section is guided when the vehicle approaches the deteriorated section in this traveling. Can be adopted. For example, the current evaluation, past evaluation, and cause of deterioration may be acquired from a device that is not mounted on the vehicle, such as an information management center. Of course, the navigation terminal 10 may be fixedly mounted on the vehicle, or the portable navigation terminal 10 may be brought into the vehicle and used. Furthermore, although the above-mentioned vehicle is a vehicle driven by an internal combustion engine, the target vehicle is not limited to such a vehicle, and the fuel consumption (in the case of an electric vehicle, per unit distance) is not limited to such a vehicle. A configuration that guides the cause of deterioration in the power consumption) may be used. That is, the evaluation of the fuel consumption in the present invention may be an evaluation of the energy efficiency consumed by the driving source of the vehicle.

The cause of the deterioration may be any cause that can be expected to improve fuel efficiency by notifying the driver, and various configurations can be adopted in addition to the configuration specified based on the vehicle speed and acceleration as in the above-described embodiment. It is. For example, it may be specified that the cause of deterioration has occurred based on accelerator pedal operation, shift lever operation, travel mode (normal travel mode, power mode that maximizes torque, etc.), etc. It may be specified that the cause of the deterioration has occurred based on the result or the like. In addition, when there are a plurality of causes of deterioration in one unit section, the cause of worsening the fuel consumption may be the cause of deterioration, or n causes (n is an integer of 2 or more) that causes a large degree of deterioration of the fuel consumption. As a cause of deterioration, various configurations can be adopted.

The guidance corresponding to the cause of deterioration may be any guidance that allows the driver to perform a driving operation for eliminating the cause of the deterioration by the guidance, and the guidance may be performed by voice output or an image. It may be done by output. The guidance is not limited to guidance for eliminating the cause of deterioration in the deteriorated section, but may be guidance indicating the content of the cause of deterioration in the deteriorated section.

Further, whether or not the vehicle has approached the deteriorated section in the current travel may be determined based on the position of the vehicle and the position of the deteriorated section in the current travel or not. . Therefore, the approach determination is not limited to the configuration in which the determination of the approach is performed based on the distance between the position of the vehicle and the position of the deteriorated section, and the driver can perform a driving operation according to the guidance without forgetting the guidance after the guidance. It may be performed based on such a time as possible, or may be performed based on such a time that the driver can determine after the guidance whether or not the cause of the deterioration reoccurs. Moreover, in the structure which performs the route guidance by voice | voice, it is good also as a structure which performs the guidance corresponding to the deterioration cause of the deterioration area between the audio | voice output for route guidance. According to this configuration, it is possible to provide guidance corresponding to the cause of deterioration in the deteriorated section without overlapping with other guidance.

Furthermore, before the vehicle reaches the deteriorated section to be guided in the current travel, guidance corresponding to the cause of deterioration in the deteriorated section may be performed. For example, in the example shown in FIG. 5C, guidance corresponding to the cause of deterioration is performed before the vehicle reaches the unit zone Z _p1 . According to this configuration, it is possible to prepare for performing the driving operation corresponding to the deterioration cause before reaching the deterioration section, and to reliably start the driving operation corresponding to the deterioration cause after reaching the deterioration section. Is possible.

Furthermore, the configuration may be such that the guidance is performed so that the voice guidance corresponding to the cause of deterioration in the deteriorated section ends before the vehicle enters the deteriorated section to be guided. For example, in the example shown in FIG. 5C, the guidance is started at a timing at which the voice guidance corresponding to the cause of deterioration ends before the vehicle enters the unit zone Z _p1 . That is, when the cause of deterioration is guided by voice, a predetermined period is required after the start of guidance until the guidance is completed. And if guidance is completed, it can be considered that all the guidance contents were transmitted to the driver. Therefore, if the guidance is made so that the voice guidance corresponding to the cause of the deterioration in the deteriorated section is terminated before the vehicle enters the deteriorated section to be guided, the entire guidance content is transmitted to the driver. It is possible to prevent the vehicle from reaching the deteriorated section before the vehicle starts.

Furthermore, a configuration may be adopted in which a deteriorated section designated by the user is specified as a guidance target. According to this configuration, it is possible to provide guidance corresponding to the cause of deterioration for the user-desired deterioration section. In this case, although the deterioration section can continue in both the front and rear of the deterioration section to be guided, only the deterioration section that continues in front of the vehicle traveling direction on the road is deteriorated with respect to the deterioration section specified by the user. It is also possible to analyze the combination of causes, or it is possible to analyze only the deteriorated sections that continue in the rearward direction of the vehicle on the road, or to analyze the combination of causes of deterioration.

Furthermore, when other deteriorated sections are continuously present in the deteriorated section to be guided, guidance corresponding to combinations of causes of deterioration in consecutive deteriorated sections may be performed. That is, the content of guidance may be determined according to the cause of deterioration that occurs without considering the order of causes of deterioration. For example, in Table 2, if the cruise (acceleration) and the cruise (deceleration) are not distinguished, and both are considered to be causes of deterioration in the cruise scene, the bottom example in Table 2 and the second example from the bottom Is the same guidance content, and it is a common guidance content when both the cause of deterioration of the cruise scene and the cause of deterioration of the high-speed driving scene occur (that is, the guidance content based on the combination regardless of the order of the cause of deterioration) Can be determined).

Furthermore, various analyzes can be performed when analyzing combinations of causes of deterioration, and the guidance content may be specified from a plurality of combinations of causes of deterioration corresponding to a plurality of deterioration sections (causes of deterioration) You may specify the guidance content without integrating.)

Furthermore, it may be configured such that guidance is performed under specific conditions. For example, a guidance execution condition that is a condition for performing guidance for each cause of deterioration is defined in advance, and is recorded in advance on the recording medium 30. When the vehicle approaches the deteriorated section to be guided, the control unit 20 refers to the recording medium 30 to identify the guide execution condition associated with the deteriorated section, and the guide execution condition is satisfied. It is set as the structure which performs the guidance corresponding to the cause of deterioration.

Here, the guidance execution conditions may be defined in advance so that the cause of deterioration can be effectively eliminated by performing guidance. For example, in the configuration in which it is determined whether or not a cause of deterioration in fuel consumption has occurred for each traveling scene as in the above-described embodiment, a state in which the certain traveling scene can be reproduced with respect to the cause of deterioration of a certain traveling scene. By associating with the guidance execution condition, the cause of deterioration can be effectively eliminated by performing guidance when the guidance execution condition is satisfied.

More specifically, if the guidance execution condition that the vehicle is stopped (for example, the vehicle speed is 0 km / h) is associated with the cause of deterioration in the start scene, the cause of deterioration in the start scene Guidance is performed when the vehicle approaches the deteriorated section where the vehicle has occurred and the vehicle is stopped. Therefore, it is possible to urge the cause of deterioration in the start scene not to reoccur at the time of start, and the possibility of eliminating the cause of deterioration in the start scene can be increased.

In addition, if the cause of deterioration in the acceleration scene is associated with the guidance execution condition that the vehicle speed is within the vehicle speed range where the vehicle speed can be accelerated (for example, the vehicle speed is 20 km / h or more and less than 60 km / h), Guidance is provided when the vehicle approaches a deteriorated section where the cause of deterioration in the acceleration scene occurs and the vehicle speed is in a vehicle speed range where the vehicle speed can be accelerated. Therefore, when the vehicle speed is in a vehicle speed range in which the vehicle can be accelerated, it is possible to urge the cause of deterioration in the acceleration scene not to reoccur, and the possibility of eliminating the cause of deterioration in the acceleration scene can be increased.

Furthermore, there is a factor that induces deceleration around the vehicle with respect to the cause of deterioration in the deceleration scene (for example, a stop factor (temporary stop line, intersection) within a predetermined distance (such as 100 m) ahead of the deteriorated section to be guided) If the guidance execution condition that there is a traffic jam, etc.) is associated, there is a factor that causes the vehicle to approach the deteriorated section where the cause of the deterioration in the deceleration scene occurs and induces deceleration around the vehicle. In some cases, guidance will be given. Therefore, when there is a factor that induces deceleration around the vehicle, the cause of deterioration in the deceleration scene can be urged not to reoccur, and the possibility of eliminating the cause of deterioration in the deceleration scene can be increased.

Furthermore, if the cause of the deterioration in the cruise (acceleration, deceleration) scene is associated with a guidance execution condition that the vehicle is traveling in a cruise (for example, the vehicle speed is 60 km / h or more and less than 100 km / h). When the vehicle approaches a deteriorated section where the cause of deterioration in the cruise (acceleration, deceleration) scene has occurred and the vehicle is traveling in a cruise, guidance is performed. Therefore, when the vehicle is cruising, the cause of deterioration in the cruise (acceleration, deceleration) scene can be urged not to reoccur, and the possibility of eliminating the cause of deterioration in the cruise (acceleration, deceleration) scene is increased. be able to.

Furthermore, if the guidance execution condition that the vehicle is traveling at high speed (for example, the vehicle speed is 100 km / h or more) is associated with the cause of deterioration in the high-speed driving scene, the cause of deterioration in the high-speed driving scene Guidance is performed when the vehicle approaches the deteriorated section where the vehicle has occurred and the vehicle is traveling at high speed. Therefore, when the vehicle is traveling at a high speed, it is possible to urge the cause of deterioration in the high-speed driving scene not to reoccur, and the possibility of eliminating the cause of deterioration in the high-speed driving scene can be increased.

In the above example, the guidance execution condition defined by the vehicle speed is associated with the start scene, the acceleration scene, the cruise scene, and the high-speed traveling scene, and the deceleration scene is defined by the features around the vehicle. Although the guidance execution conditions are associated, of course, the guidance execution conditions may be defined by other elements, and various conditions can be adopted.

DESCRIPTION OF SYMBOLS 10 ... Navigation terminal, 20 ... Control part, 21 ... Driving assistance program, 21a ... Current travel history acquisition part, 21b ... Past travel history acquisition part, 21c ... Deterioration cause guide part, 30 ... Recording medium, 30a ... Map information, 30b ... Evaluation information, 41 ... GPS receiver, 42 ... Vehicle speed sensor, 43 ... Gyro sensor, 44 ... User I / F part

Claims

Acquisition of past travel history for acquiring the position of a deteriorated section that is a unit section in which the evaluation of the fuel efficiency of the vehicle in the past travel of the vehicle is worse than a predetermined evaluation level, and the cause of deterioration that causes the deterioration of fuel consumption in the deteriorated section Means,
Deterioration cause guidance means for performing guidance corresponding to the cause of deterioration in the deteriorated section when the vehicle approaches the deteriorated section to be guided in the current traveling;
A driving support system comprising:
Guidance execution conditions, which are conditions under which the deterioration cause guidance means guides, are associated with each cause of deterioration,
The deterioration cause guidance means is a case where the vehicle approaches the deteriorated section to be guided, and the guidance execution condition associated with the cause of deterioration in the deteriorated section to be guided is satisfied. If so, provide guidance corresponding to the cause of the deterioration of the deterioration section,
The driving support system according to claim 1.
The guidance execution condition is defined by the vehicle speed,
The driving support system according to claim 1 or 2.
The deterioration cause guide means is:
When the distance between the position of the deteriorated section and the position of the vehicle is equal to or less than a predetermined distance, the closest deteriorated section existing in front of the vehicle on the planned travel route in the current travel is set as the deteriorated section to be guided. Provide guidance corresponding to the cause of the deterioration in the deterioration section,
The driving support system according to any one of claims 1 to 3.
The deterioration cause guide means is:
Before the vehicle reaches the deteriorated section to be guided in the current traveling, guidance corresponding to the cause of the deterioration in the deteriorated section is performed.
The driving support system according to any one of claims 1 to 4.
The deterioration cause guide means is:
Before the vehicle enters the deteriorated section to be guided, guidance is provided so that voice guidance corresponding to the cause of the deterioration in the deteriorated section ends.
The driving support system according to any one of claims 1 to 5.
The deterioration cause guide means is:
When the other worsening section is continuously present in the worsening section to be guided, the guidance corresponding to the combination of the causes of the worsening of the successive worsening section is performed.
The driving support system according to any one of claims 1 to 6.
The deterioration cause guide means is:
In the case where the other deterioration section is continuously present in the deterioration section to be guided, and the cause of the deterioration is the same in all the deterioration sections that are continuous, the deterioration section that is continuous Providing guidance corresponding to the cause of the deterioration in the deterioration section closest to the vehicle,
The driving support system according to any one of claims 1 to 7.
The deterioration cause guide means is:
Performing either or both of guidance indicating the content of the cause of deterioration in the deteriorated section and guidance for eliminating the cause of deterioration in the deteriorated section,
The driving support system according to any one of claims 1 to 8.
Acquisition of past travel history for acquiring the position of a deteriorated section that is a unit section in which the evaluation of the fuel efficiency of the vehicle in the past travel of the vehicle is worse than a predetermined evaluation level, and the cause of deterioration that causes the deterioration of fuel consumption in the deteriorated section Process,
When the vehicle approaches the deteriorated section to be guided in the current travel, a deterioration cause guidance process for performing guidance corresponding to the cause of the deterioration in the deteriorated section;
Driving support method including.
Acquisition of past travel history for acquiring the position of a deteriorated section that is a unit section in which the evaluation of the fuel efficiency of the vehicle in the past travel of the vehicle is worse than a predetermined evaluation level, and the cause of deterioration that causes the deterioration of fuel consumption in the deteriorated section Function and
A deterioration cause guidance function for providing guidance corresponding to the cause of deterioration in the deteriorated section when the vehicle approaches the deteriorated section to be guided in the current travel;
Driving support program that realizes the computer.