JP2014089054A - Driving assisting system, method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique enabling a driver to recognize whether the degree of economical running has actually been improved according to a guide for improving the degree of economical running.SOLUTION: Before a vehicle enters a guide target section including at least one aggravation section in which the degree of economic running in the past running of the vehicle is lower than a predetermined level, a pre-running guide for improving the degree of economic running in at least the one aggravation section in the guide target section is provided. According to the degree to which economical running in the aggravation section provided with the pre-running guide has improved this time, the improved degree of economical running in the guide target section is determined. Then, a post-running guide, which is a guide indicating the degree of improvement, is provided.

Description

  The present invention relates to a driving support system, a method, and a program for providing guidance on the economic driving degree of a vehicle.

  Conventionally, various techniques for performing guidance for improving the fuel efficiency of a vehicle have been developed. For example, in Patent Document 1, when there is a caution point in the traveling direction of the host vehicle, the driving operation for improving the economic driving degree is advised so that the evaluation of driving satisfies a predetermined evaluation standard at the caution point, A technique for assisting the driving operation of the driver of the host vehicle is disclosed.

JP 2011-81743 A

In the above-described prior art, it is expected that the economic running degree is improved by the driver performing the driving operation according to the advice at the caution point. However, it cannot be determined whether or not the economic driving performance has actually improved at the caution point. As described above, in the state where it is unknown whether or not the advice has contributed to the improvement of the economic driving degree, the willingness to try to improve the driving operation according to the advice is reduced, and the advice is not taken into account in the end.
The present invention has been made in view of the above problems, and provides a technology that allows a driver to recognize whether or not the economic driving performance has actually been improved according to guidance for improving the economic driving performance. The purpose is to do.

  In order to achieve the above object, in the present invention, the vehicle travels before the vehicle enters the guidance target section including at least one deteriorated section in which the economic travel degree in the past travel of the vehicle is worse than a predetermined level. The previous guidance means performs pre-travel guidance, which is guidance for improving the economic travel level of at least one deteriorated section in the guidance target section. Further, according to the degree to which the economic driving degree in the deteriorated section where the pre-travel guidance is performed has been improved in the current driving, the improvement degree determining means determines the improvement degree in which the economic driving degree in the guidance target section has been improved. Then, the after-travel guidance means performs after-travel guidance that is guidance indicating the degree of improvement.

  That is, in the configuration in which the pre-travel guidance is performed for the guidance target section, the improvement degree indicating the degree of improvement in the economic travel of the deteriorated section in which the pre-travel guidance is performed in the current travel is guided as the post-travel guidance. As a result, it is possible to make the driver recognize whether or not the economic driving degree has actually been improved in accordance with the pre-travel guidance for improving the economic driving degree.

  Here, the pre-travel guidance means is arranged in the guidance target section before the vehicle enters the guidance target section including at least one deterioration section in which the economic travel degree in the past travel of the vehicle is worse than a predetermined level. It suffices if guidance before traveling, which is guidance for improving the economic driving degree of at least one deteriorated section, can be performed. That is, the pre-travel guidance means travels so that the driver can recognize the driving operation for improving the economic travel in the deteriorated section before traveling in the deteriorated section where the economic travel was poor in the past travel. It suffices to be able to provide advance guidance.

  The economic driving degree may be an index for evaluating the amount of energy consumed per unit distance when the vehicle travels, and may be the fuel consumption itself, or an evaluation of a driving operation that affects the fuel consumption. May be. The deteriorated section only needs to be a section including a point where the economic running degree is worse than a predetermined level, and the deteriorated section may be a single point or may have a length. The length may be a constant distance or may vary. For example, when the points where the economic running degree is worse than a predetermined level are continuous, the deteriorated section is a section having a length. In this case, a section in which points where the economic running rate is lower than a predetermined level may be continued as one section, or a plurality of unit sections defined for each fixed distance are regarded as continuously deteriorated sections. May be. Of course, when the unit section includes points with an economic running degree worse than a predetermined level at a predetermined ratio or more, the unit section may be regarded as a deteriorated section.

  The predetermined level may be set so that it can be considered that there is a room for improving fuel efficiency when the economic driving degree is lower than the predetermined level, and may be a predetermined fixed value. It may be a value that gradually changes according to improvement in driving technology or the like. The guidance target section only needs to be defined so that the number of deterioration sections existing in the guidance target section can be measured. For example, a determination section is set for each predetermined distance, and at least one deterioration section is included in the determination section. If it is included, the structure etc. which make the said determination area the guidance object area are employable.

  The pre-travel guidance only needs to be a guide for improving the degree of economic travel. In addition to guidance for recognizing the existence of a deteriorated section, the structure for guiding the cause of deterioration of the economic travel in the deteriorated section and the cause of deterioration of the economic travel It is possible to employ a configuration that guides the driving operation for solving the problem. In addition, the pre-travel guidance is guidance performed for at least one deteriorated section in the guidance target section, and the pre-travel guidance may be performed using a section including a plurality of deteriorated sections as a guide target section. When performing pre-travel guidance using a section including a plurality of deteriorated sections as a guidance target section, the pre-travel guidance may be performed once or multiple times. In the former, the common guidance for improving the economic running degree of the plurality of deteriorated sections is the pre-running guidance. In addition, it may be configured such that pre-travel guidance for each deteriorated section is performed so that the correspondence between the pre-travel guidance and the deteriorated section is recognized, or the correspondence between the pre-travel guidance and the deteriorated section is unknown It may be configured such that pre-travel guidance is performed. Even in the latter case, if the degree of improvement in economic driving is indicated by the post-travel guidance, driving assistance for improving the economic driving can be performed.

  The degree-of-improvement determination means determines the degree of improvement in which the degree of economic driving in the guidance target section has been improved according to the degree to which the degree of economic driving in the deteriorated section where the pre-travel guidance has been improved If you can. That is, it suffices to determine the degree of improvement that serves as an index for determining whether the pre-travel guidance for the deteriorated section is significant. The degree of improvement only needs to be determined according to the degree to which the economic driving degree of the deteriorated section where the pre-travel guidance was performed is improved in the current driving of the vehicle. The degree of improvement may be defined in consideration of the economic driving degree in the current driving for the section or the like.

  The post-travel guidance means only needs to be able to perform post-travel guidance, which is a guide indicating the degree of improvement. In other words, it is only necessary to provide guidance after traveling so that the driver can recognize whether or not the economic driving degree has been improved according to the guidance before traveling.

  Further, the cause of deterioration of the economic driving degree of at least one deteriorated section in the deteriorated section in the past travel in the guide target section is set as a guide target cause, and the pre-travel guide means performs pre-travel guidance on the guide target cause. It is good also as a structure. In other words, if pre-travel guidance related to the guidance target cause, such as guidance for eliminating the guidance target cause, is performed, the driver travels in the guidance target section while paying attention to eliminate the guidance target cause in the current travel. Therefore, a one-time pre-travel guidance causes a deteriorated section whose cause of deterioration is a deterioration cause in the previous travel in the guidance target section (the economic travel degree is lower than a predetermined level due to the guide target cause in the past travel). It is possible to provide guidance for improving the economic driving degree for all of the deteriorated sections in the guidance target section that has become worse.

  In this case, further, when the degree of economic travel in the current travel is better than a predetermined level in all of the deteriorated sections in the guidance target section that have deteriorated due to the guidance target cause, these deteriorations It is good also as a structure which an improvement degree determination means determines the said improvement degree so that an improvement degree may improve rather than the case where the economical driving | running | working degree in this driving | running | working is worse than a predetermined level in at least 1 of the area. According to this configuration, the economic driving degree is improved in the current driving for all the deteriorated sections in the guiding target section where the economic driving degree in the past driving deteriorated due to the guidance target cause guided by the pre-travel guidance. It can be easily determined based on the degree of improvement.

  In addition, since the deteriorated section is defined so that it becomes a deteriorated section when the economic driving degree in the past traveling of the vehicle is worse than the predetermined level, the section that was the deteriorated section in the past traveling is defined as the current traveling If the economy travel degree is better than a predetermined level when traveling at, the section that was a deteriorated section in the past travel is no longer a deteriorated section in the current travel. Therefore, in all the deteriorated sections in the guidance target section in which the economic driving degree has become worse than the predetermined level in the past driving due to the guidance target cause, it is bad if the economic driving degree is better than the predetermined level in the current driving. If the degree of improvement is defined to be higher than in the case of the previous driving, all the deteriorated sections in the guidance target section where the economic driving degree has become worse than the predetermined level in the past driving due to the guidance target cause deteriorated in the current driving. It is defined so that the degree of improvement is improved when it is no longer a section.

  Further, when the degree of improvement in the economic driving degree in the current driving is better than a predetermined level in all of the deteriorated sections that cause the deterioration of the guidance target cause among the deteriorated sections in the past driving in the guidance target section Indicates that the economic driving degree in the guidance target section has been improved, and in at least one of the deteriorated sections in the guidance target section that have deteriorated due to the guidance target cause, the economy in the current driving When the driving degree is worse than a predetermined level, the improvement degree may be determined so as to indicate that the economic driving degree in the guidance target section is not improved. In other words, if the worsening section that caused the cause of worsening of the guidance target cause among the worsening sections in the past travel in the guidance target section is not a worsening section in this travel, the economic driving degree improves, even if part The degree of improvement is defined so as to indicate that the economic running degree has not improved when it remains as a deteriorated section. According to this configuration, it is possible to indicate by the degree of improvement whether or not the improvement of the economic degree of travel according to the pre-travel guidance has been executed reliably.

  In addition, when the degree of economic driving in the current traveling is better than a predetermined level in all of the deteriorated sections that cause the deterioration of the guidance target cause among the deteriorated sections in the past traveling in the guidance target section, Furthermore, in the deteriorated section of the past travel in the guidance target section where the cause of the deterioration is different from the cause of the guidance target, if the degree of economic travel in the current travel is better than the predetermined level, it is worse than the predetermined level. The degree of improvement may be determined so that the degree of improvement is higher than that in the case of the above. According to this configuration, it is possible to indicate by the degree of improvement that the degree of economic driving has improved in a deteriorated section where the degree of economic driving has deteriorated from a predetermined level in past driving due to a cause of deterioration different from the guidance target cause.

  In this configuration, the improvement degree determination means has a predetermined degree of economic travel even in the current travel in a deteriorated section where the cause of deterioration is different from the cause of the guide target among the deteriorated sections in the past travel in the guide target section. When it is worse than the level, the cause of deterioration in the deteriorated section in which the economic running degree is worse than the predetermined level is also specified in the current driving, and the improvement degree is determined according to the number of the specified deterioration causes You may do it. That is, if the deteriorated section in the guide target section where the economic driving degree has become worse than the predetermined level in the past travel due to the deterioration cause different from the guide target cause, those deteriorated sections in the current travel The cause of the deterioration is identified, and the degree of improvement is determined according to the number of the causes of the deterioration. According to this configuration, the improvement degree can be easily determined.

  Furthermore, according to the degree to which the improvement degree determining means is improved in the section from the start to the end of the current travel in the deteriorated section whose cause is the deterioration of the guide target cause among the deteriorated sections in the past travel in the guide target section The cumulative improvement degree of the economic driving degree may be determined, and the post-travel guidance unit may perform guidance indicating the cumulative improvement degree after the end of the current driving. According to this configuration, the driver can recognize the degree of improvement in the economic driving degree according to the pre-travel guidance in the section from the start to the end of the current travel, and continuously travel while traveling. It can be determined whether or not the economic driving degree has been improved according to the previous guidance.

  Further, as in the present invention, pre-travel guidance is performed in order to improve the economic travel in the deteriorated section where the economical travel in the past travel was bad, and the economic travel in the case of traveling this deteriorated section this time The method of guiding the improvement degree can also 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 a deterioration area acquisition process. (4A) is a flowchart showing the pre-travel guidance process, and (4B) is a flowchart showing the post-travel guidance process. (5A)-(5E) are figures which show typically evaluation of a unit section, a judgment section, a guidance object section, and an economic run degree set on the planned travel route.

Here, embodiments of the present invention will be described in the following order.
(1) Configuration of navigation terminal:
(2) Evaluation information acquisition process:
(3) Deteriorating section acquisition process:
(4) Pre-travel guidance processing:
(5) Post-travel guidance processing:
(6) 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 includes a route guidance program (not shown) that performs voice guidance for encouraging travel according to the planned travel route, pre-travel guidance and post-travel guidance for a worse section where the economic travel is worse than a predetermined level. A driving support program 21 for providing guidance 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.

  In the recording medium 30, map information 30a and voice guidance information 30c are recorded in advance. 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. The voice guidance information 30c is voice information indicating the pre-travel guidance and the post-travel guidance regarding the deteriorated section, and the cause of deterioration is associated with the pre-travel guidance. The control unit 20 can cause the speaker to output voice guidance for eliminating the cause of deterioration by outputting sound information corresponding to the cause of deterioration in the deterioration section to the speaker of the user I / F unit 44.

  Moreover, in this embodiment, the evaluation information 30b which shows the economical running degree of a vehicle is recorded whenever a vehicle drive | works. Here, the economic travel is an index for evaluating the amount of energy consumed per unit distance when the vehicle travels. In this embodiment, the economic travel is caused by a deterioration factor that deteriorates the fuel consumption in the unit section. It is the information which shows the ratio which was drive | working in the state which is not carried out. Further, in the present embodiment, when the cause of deterioration of the economic driving degree occurs in the unit section, the information indicating the cause of the deterioration and the distance traveled by the vehicle while the cause of deterioration has occurred is the evaluation information 30b. Corresponding to 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. . In the present embodiment, when a predetermined cause of deterioration occurs in a plurality of driving scenes assumed in advance, the degree of economic driving is considered to deteriorate, and the cause of deterioration is classified for each of the plurality of driving scenes. ing. 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.

  In this embodiment, the control part 20 performs the driving assistance program 21, and performs the guidance before driving | running | working and guidance after driving | running | working regarding a worsening area where an economical driving | running | working degree is worse than a predetermined level. In order to execute this process, the driving support program 21 includes a current travel history acquisition unit 21a, a deteriorated segment acquisition unit 21b, a determination segment setting unit 21c, a pre-travel guide unit 21d, an improvement determination unit 21e, and a post-travel guide unit 21f. It has.

  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 fixed distance (for example, 50 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 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. Note that the economic travel for each unit section recorded as the evaluation information 30b in the current travel is referred to herein as the current evaluation.

  The deteriorated section acquisition unit 21b has a function of acquiring a past evaluation indicating the degree of economic driving of the vehicle in the past than the current travel for each unit section, and a position of the deteriorated section in which the past evaluation is a unit section having a worse level than a predetermined level. This is a program module that causes the control unit 20 to realize the function of acquiring the function 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 the acquisition target of the 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 level (predetermined threshold), and when it is equal to or higher than the predetermined level, the economic travel degree is “good” and the lighting ratio is smaller than the predetermined level. In this case, the economic driving degree is set to “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. Further, the predetermined level only needs to be set so that there is room for improving fuel efficiency when the economic driving degree is lower than the predetermined level. It is a fixed value to set. 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

  Furthermore, the control part 20 acquires the cause of a deterioration which is a cause of the deterioration of the fuel consumption in a deterioration area by the process of the deterioration area acquisition part 21b. 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 determination section setting unit 21c is a program module that causes the control unit 20 to realize a function of setting a determination section including a plurality of continuous unit sections. In the present embodiment, the control unit 20 measures the number of unit sections for which past evaluation has been acquired by the process of the deteriorated section acquisition unit 21b, and sets a section in which a certain number (for example, eight) unit sections are continuous as a determination section. Set. That is, the control unit 20 classifies the plurality of unit sections into determination sections that are longer sections. The determination section is a section defined as a unit for determining whether or not a deterioration section exists in the determination section. In the present embodiment, when there is a deterioration section in the determination section, the section becomes a guidance target section, and pre-travel guidance regarding the deterioration section is performed once for each guidance target section. It is determined whether or not

  The number of unit sections included in the determination section is arbitrary, and may be a fixed number or may be a variable number. The number of unit sections included in the determination section is regulated so that frequent pre-travel guidance is prevented in a short period. Therefore, when the guidance target section includes a plurality of deteriorated sections in the past travel, it is preferable that the common guidance for improving the economic travel of the plurality of deteriorated sections is the pre-travel guidance. If there are a plurality of deteriorating sections in the guidance target section where the economic driving degree has deteriorated due to the same deterioration cause in the past driving, in order to improve the economic driving degree of these plural deteriorating sections These common guides are pre-travel guidance. In FIG. 5A, the planned travel route of the vehicle is indicated by an arrow, and a determination interval formed by a unit interval Zu set on the planned travel route and a certain number of unit intervals is Zn (n is a natural number). It shows.

The pre-running guide unit 21d has at least one in the guidance target section before the vehicle enters the guidance target section including at least one worsening section in which the degree of economic travel in the past travel of the vehicle is worse than a predetermined level. It is a program module that causes the control unit 20 to realize a function of performing pre-travel guidance, which is guidance for improving the economic travel of each deteriorated section. That is, the control unit 20 allows the driver to recognize a driving operation for improving the economic travel in the deteriorated section before traveling in the deteriorated section where the economic travel is poor in the past travel. To give pre-travel guidance. For this reason, the control unit 20 determines whether or not the unit section included in the determination section is a deteriorated section in the past travel for each of the determination sections set by the processing of the determination section setting section 21c. And the control part 20 makes the determination area the guidance object area if even one deterioration area is included in the determination area. For example, in the example shown in FIG. 5A, past evaluations Epg and Epb are shown by icons imitating leaves at the center of each unit section, and the hatched icon Epb indicates that the unit section is a deteriorated section in the past run. The icon Epb without hatching indicates that the unit section is a unit section that is not a deteriorated section in the past travel (a unit section that was evaluated as “good”). The determination section Z _n shown in FIG. 5A is a guidance target section because it includes past evaluations Epb _{1 to} Epb ₄ indicating that the section is a deterioration section.

  In the present embodiment, the control unit 20 provides pre-travel guidance for the guidance target section when the vehicle reaches a predetermined distance (for example, a distance corresponding to the length of the determination section) to the start position of the guidance target section. Output. In the present embodiment, the pre-travel guidance regarding the deteriorated section in the past travel may be a guide for improving the economic travel. Therefore, in addition to guidance for recognizing the existence of a deteriorated section in the past driving, a configuration for guiding the cause of deterioration of the economic driving degree in the deteriorated section in the past driving and a driving operation for eliminating the cause of deterioration of the economic driving degree It is possible to adopt a configuration that guides the user. In this embodiment, it is comprised so that the guidance before driving regarding the deterioration area in the past driving | running | working may be performed by guiding the driving operation for eliminating the cause of deterioration of the economic driving degree.

  That is, in the present embodiment, when the guidance target section includes one deteriorated section in the past travel, the control unit 20 sounds the voice information indicating the pre-travel guidance associated with the cause of deterioration in the deteriorated section. The voice information is extracted from the guidance information 30 c and output to the speaker of the user I / F unit 44. As a result, the pre-travel guidance indicating the driving operation for eliminating the cause of deterioration in one deteriorated section included in the guidance target section is output from the speaker.

  On the other hand, when the guidance target section includes two or more deterioration sections in the past travel, the control unit 20 identifies the cause of deterioration of the deterioration section included in the guidance target section, and selects the cause of deterioration according to the guidance priority. To do. And the control part 20 extracts the audio | voice information which shows the guidance before driving | running | working with which the selected cause of deterioration was matched from the audio | voice guidance information 30c, and outputs the said audio | voice information with respect to the speaker of the user I / F part 44. . As a result, the pre-running guidance indicating the driving operation for eliminating the cause of deterioration with high guidance priority among the causes of deterioration in the deteriorated section included in the guidance target section is output from the speaker.

  The guidance priority can be determined according to various conditions. For example, among the causes of deterioration in the deteriorated section in the past travel included in the guidance target section, the guidance priority of the most frequent cause of deterioration is increased. Configuration that increases the priority of guidance for the cause of deterioration that is highly effective in improving economic driving, and configuration that increases the priority of guidance for the deterioration that can easily improve economic driving. is there. Moreover, in this specification, the cause of deterioration of the deteriorated section in the past travel guided by the pre-travel guidance is referred to as a guidance target cause.

  The degree-of-improvement determination unit 21e determines the degree of improvement in which the degree of economic travel in the guidance target section is improved according to the degree to which the degree of economic travel in the deteriorated section where the pre-travel guidance has been performed has been improved in the current travel of the vehicle It is a program module that causes the control unit 20 to realize the function. That is, the control unit 20 determines an improvement level as an index for determining whether or not the pre-travel guidance for the deteriorated section is significant by the process of the improvement level determination unit 21e. In the present embodiment, the degree of improvement is determined according to the degree to which the economic driving degree of the deteriorated section where the pre-travel guidance is performed is improved in the current driving of the vehicle, and the deteriorated section where the pre-travel guidance is performed It is determined in consideration of the economic driving degree in the current driving for the deteriorated section other than.

  Specifically, the control unit 20 acquires the deterioration cause of the deteriorated section in the past travel in the guidance target section specified by the process of the deteriorated section acquisition unit 21b as the guide target cause, and the cause of the deterioration is the guide target cause. Identify the deteriorating sections that were present. In addition, the control unit 20 refers to the evaluation information 30b when the unit section corresponding to the deteriorated section is traveled this time, and determines whether the economic travel degree in the unit section is better than a predetermined level. . The control unit 20 improves when the degree of economic travel in the current travel is better than a predetermined level in all of the deteriorated sections in the guidance target section that have deteriorated due to the cause of the guidance target. The degree is any one of 1 to 3. Moreover, the control part 20 is the case where the economic driving | running | working degree in this driving | running | working is worse than the predetermined level in at least 1 of the deterioration area which causes a guidance object cause among the deterioration areas in the past driving | running | working in a guidance object area. The improvement degree is set to 0.

  In the present embodiment, the unit section is defined to be a deteriorated section when the economic running degree of the unit section is worse than the predetermined level. If the degree of economic travel is better than a predetermined level when traveling, the section that was a deteriorated section in the past travel is no longer a deteriorated section in the current travel. Therefore, in the present embodiment, the control unit 20 determines that all the deteriorated sections in the guidance target section in which the economic travel degree has become worse than a predetermined level in the past travel due to the guide target cause are the deteriorated sections in the current travel. The improvement degree is determined so that the improvement degree is any one of 1 to 3 when it disappears.

  Furthermore, in the present embodiment, the control unit 20 determines that the economic running degree in the current running is better than a predetermined level in all of the deteriorated sections in the guidance target section that have deteriorated due to the guidance target cause. If it is, the degree of improvement is determined as any one of 1 to 3 as described above. For this reason, the control unit 20 acquires the cause of deterioration of the deteriorated section in the past travel in the guidance target section specified by the process of the deteriorated section acquisition unit 21b, and the cause of deterioration in the past travel is different from the cause of the guide target. Identify the deteriorating interval that was the cause. In addition, the control unit 20 refers to the evaluation information 30b when the unit section corresponding to the deteriorated section is traveled this time, and determines whether the economic travel degree in the unit section is better than a predetermined level. . Then, the control unit 20 determines the economic driving degree in the current driving of the vehicle in the deteriorated section in the guiding target section where the economic driving degree has become worse than a predetermined level in the past driving due to the deterioration cause different from the guiding target cause. When the level is better than the predetermined level, the level of improvement is determined so that the level of improvement is higher than when the level is lower than the predetermined level.

  More specifically, the control unit 20 determines the economy in the current travel in the deteriorated section in the guide target section in which the economic travel level has become lower than a predetermined level in the past travel due to the deterioration cause different from the guide target cause. When the running degree is worse than a predetermined level, the degree of improvement is determined according to the number of causes of deterioration in the deteriorated section. In other words, the control unit 20 determines that the deteriorated section in the guidance target section in which the economic travel degree has become worse than a predetermined level in the past travel due to the deterioration cause different from the guidance target cause is also a deteriorated section in the current travel. (When the economic driving degree is worse than a predetermined level), the cause of deterioration in past driving in those deterioration sections is specified. Then, the control unit 20 sets the improvement degree to 2 when the number of causes of deterioration is one, and sets the improvement degree to 1 when the number of causes of deterioration is two or more. Note that, when the deteriorated section no longer exists in the guidance target section in the current travel, the control unit 20 sets the improvement degree to 3.

  The post-travel guidance unit 21f is a program module that causes the control unit 20 to realize a function of performing post-travel guidance that is guidance indicating the degree of improvement. That is, the control unit 20 performs post-travel guidance so that the driver can recognize whether or not the economic travel level has been improved according to the pre-travel guidance. In the present embodiment, the control unit 20 extracts voice information indicating the degree of improvement (any of 0 to 3) from the voice guidance information 30 c and outputs the voice information to the speaker of the user I / F unit 44. As a result, a sound indicating that the improvement degree is any one of 0 to 3 is output from the speaker of the user I / F unit 44.

  According to the above configuration, it is possible to make the driver recognize whether or not the economic driving degree has actually been improved in accordance with the pre-travel guidance for improving the economic driving degree. Furthermore, the pre-travel guidance is guidance on the cause of the guidance target, and when the pre-travel guidance is performed, the driver travels the guidance target section in such a way that the driver eliminates the guidance target cause in the current travel, It is possible to perform guidance for improving the degree of economic travel for all the deteriorated sections in the guide target section whose cause is the deterioration due to the guide target cause by one pre-travel guidance.

  In addition, the deterioration degree becomes 1 to 3 when the deteriorated sections whose cause of deterioration is the cause of deterioration among the deteriorated sections in the past travel in the guide target section are not deteriorated sections in the current travel. However, since the degree of improvement becomes 0 when it remains as a deteriorated section, the driver can determine whether the degree of improvement is 0 or not, so that the improvement of the economic driving degree according to the pre-travel guidance is reliably executed. It can be easily recognized based on the degree of improvement. In addition, according to the numerical value (1 to 3) of the improvement degree, the economic driving degree is improved by the current driving in the deteriorated section where the economic driving degree becomes worse than the predetermined level in the past driving due to the deterioration cause different from the guidance target cause. Therefore, the driver can also determine the improvement degree of the economic driving degree for the deteriorated section where the pre-travel guidance is not performed.

(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 the present 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 addition processing 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 a 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. And when it determines with the cause of deterioration not having generate | occur | produced in step S170, the control part 20 adds a travel distance to an economical 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, if it is not determined in step S170 that the cause of deterioration has not occurred, 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. That is, the control unit 20 determines that the vehicle has traveled through the unit section and exits the loop process of steps S100 to S180 when the cumulative distance is equal to or greater than a predetermined distance defined as the distance of the unit section. Become.

  If it is determined in step S180 that the cumulative distance is equal to or greater than the predetermined 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) Deteriorating section acquisition process:
Next, the deterioration area acquisition process which the control part 20 performs by the process of the deterioration area acquisition part 21b is demonstrated in detail. FIG. 3 is a flowchart of the deteriorated section acquisition 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 traveling are past. When the evaluation information 30b regarding travel exists, the deterioration section acquisition process is executed.

  In the deterioration section acquisition process, the control unit 20 acquires evaluation information of the unit section on the planned travel route by the process of the deterioration section acquisition unit 21b (step S200). That is, the control unit 20 refers to the map information 30a and the evaluation information 30b by the process of the deterioration section acquisition unit 21b, identifies the planned travel route from the departure point of the vehicle to the destination, and sets it on the planned travel route. Evaluation information for each unit section obtained is acquired. Next, the control unit 20 sets an unprocessed unit section as a unit section to be processed (step S205). That is, the control unit 20 sequentially performs the process of setting the processing target from the unit section close to the departure place and performing the past evaluation to the unit section of the destination, and when step S205 is executed for the first time, the departure place The unit section that passes after the start of traveling from is set as a unit section to be processed, and when the processing of steps S205 to S230 is completed for the unit section to be processed, a unit section that is an unprocessed unit section and is close to the departure place is newly added. A unit section to be processed.

  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 deterioration section 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 deteriorated section acquisition unit 21b (step S210). 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 deteriorated section acquisition unit 21b ( Step S220). The predetermined threshold compared with the economic travel ratio is the above-mentioned predetermined level. When step S215 or S220 is executed, information indicating past evaluation is associated with each unit section, and information indicating past evaluation for each unit section is recorded in the RAM.

  When the past evaluation is set to be bad by step S220, that is, when the unit section to be processed is a deteriorated section, the control unit 20 acquires the cause of deterioration of the deteriorated section by the process of the deteriorated section acquiring unit 21b. (Step S225). 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. When the cause of deterioration is acquired, information indicating the cause of deterioration is associated with information indicating the deterioration section and recorded in the RAM.

  If step S215 or S225 is performed, the control part 20 will determine whether the past evaluation of all the unit areas has been specified by the process of the deterioration area acquisition part 21b (step S230). That is, the control unit 20 determines whether or not the process of specifying the past evaluation as the processing target has been performed for all the unit sections on the planned travel route. If it is not determined in step S230 that the past evaluations of all the unit sections have been specified, the processes in and after step S205 are repeated. On the other hand, when it is determined in step S230 that the past evaluations of all the unit sections have been specified, the control unit 20 ends the deterioration section acquisition process. As a result of the above processing, the past evaluation for each unit section Zu as indicated by the icon imitating a leaf in FIG. 5A is specified.

(4) Pre-travel guidance processing:
Next, the pre-travel guidance process will be described in detail. FIG. 4A is a flowchart of the pre-travel guidance process. In the present embodiment, the control unit 20 performs the pre-travel guidance process by the processes of the determination section setting unit 21c and the pre-travel guide unit 21d while the vehicle is traveling after the deterioration section acquisition process is completed. When the execution of the pre-travel guidance process is started, the control unit 20 sets a determination section by the process of the determination section setting unit 21c (step S300). That is, the control unit 20 repeats the process of acquiring a fixed number of unit sections in order from the departure point and defining them as determination sections for the plurality of unit sections for which the past evaluation has been acquired by the deteriorated section acquisition process until the destination. As a result, as shown in FIG. 5A, a certain number of unit intervals Zu are classified into determination intervals Z _n (n is a natural number). Information such as an ID indicating a determination section is associated with each unit section, and information indicating a determination section is recorded in the RAM for each unit section.

Next, the control unit 20 acquires a guidance target section by the process of the pre-travel guidance unit 21d (step S305). That is, the control unit 20 acquires, as a guidance target section, a determination section including one or more deteriorated sections whose past evaluation is “bad”. In the example shown in FIG. 5A, the determination zone Z _n is acquired as a guidance target zone. Each determination section is associated with information such as a flag indicating whether or not the determination section is a guidance target section, and information indicating whether or not the determination section is a guidance target section is recorded in the RAM.

  Next, the control unit 20 waits until it is determined by the process of the pre-travel guide unit 21d that the current position of the vehicle is equal to or less than the predetermined distance to the guidance target section (step S310). In the present embodiment, the predetermined distance is the same as the distance of the determination section (the sum of the distances of a certain number of unit sections). Therefore, in this embodiment, the control unit 20 stands by until reaching the start position of the determination section adjacent to the guidance target section on the opposite side to the traveling direction, and when reaching the start position of the determination section, step S320 and subsequent steps. Will be executed.

If it is determined in step S310 that the current position of the vehicle is equal to or less than the predetermined distance to the guidance target section, the control unit 20 determines that the past evaluation included in the guidance target section is “bad” by the process of the pre-travel guidance unit 21d. The pre-travel guidance is output for the cause of deterioration having the highest guidance priority among the causes of deterioration in the deteriorated section (step S320). That is, in other words, the control unit 20 acquires information indicating the cause of deterioration recorded in the RAM in step S225 for each of the deterioration sections in which the past evaluation included in the guidance target section is “bad”. In the example shown in FIG. 5A, it shows an example of deterioration due to lower deterioration sections constituting the guidance target section Z _n. That is, in the example illustrated in FIG. 5A, the control unit 20 causes the deterioration section Epb ₁ whose past evaluation is “bad” to be the cause of deterioration in the acceleration scene, and the deterioration section whose past evaluation is “bad”. It is acquired that the cause of deterioration of Epb ₂ and Epb _{4 is} the cause of deterioration in the deceleration scene, and the cause of deterioration in the deterioration section Epb ₃ whose past evaluation is “bad” is the cause of deterioration in the start scene.

  Furthermore, the control unit 20 identifies the cause of deterioration having the highest guidance priority as the guidance target cause based on the guidance priority for each cause of deterioration. For example, when the configuration in which the most frequent cause of deterioration is considered to have the highest guidance priority is adopted, in the example illustrated in FIG. 5A, the control unit 20 guides the cause of the deterioration in the deceleration scene having the highest guidance priority. Identify the target cause. Further, the control unit 20 acquires voice information corresponding to the guidance target cause from the voice guidance information 30 c and outputs the voice information to the speaker of the user I / F unit 44. As a result, the pre-travel guidance indicating the driving operation for eliminating the cause of the guidance target is output from the speaker. Thereafter, the control unit 20 repeats the processes after step S310.

(5) Post-travel guidance processing:
Next, the post-travel guidance process will be described in detail. FIG. 4B is a flowchart of the post-travel guidance process. In the present embodiment, when the vehicle reaches the end position of the guidance target section, the control unit 20 performs a post-travel guidance process by processing of the improvement degree determination unit 21e and the post-travel guide unit 21f. When execution of the post-travel guidance process is started, the control unit 20 acquires the current evaluation and the cause of deterioration of each unit section in the guidance target section that has passed immediately before by the process of the improvement degree determination unit 21e (step S400). ). That is, the control unit 20 refers to the information recorded in the recording medium 30 as the evaluation information 30b by the current travel by the process of the current travel history acquisition unit 21a, and this time of each unit section in the guidance target section that has passed immediately before. To obtain the economic travel ratio in the travel of Then, the control unit 20 determines that the current evaluation of the unit section is “good” when the economic travel ratio is equal to or higher than a predetermined threshold, and the current evaluation of the unit section is “bad” when not higher than the predetermined threshold. (That is, a deterioration section), and information indicating the current evaluation for each unit section is recorded in the RAM. In addition, for the worse section where the current evaluation is “bad”, the control unit 20 further refers to the evaluation information 30b and specifies the uneconomical travel distance for each travel scene. And the control part 20 compares the uneconomical mileage for every driving | running | working scene, selects the driving | running | working scene with the longest distance, the cause of deterioration in this driving | running | working in the selected driving | running | working scene is the cause of deterioration of the said deterioration area. Is considered.

  Next, the control unit 20 determines whether or not all of the deteriorated sections in the past travel in which the cause of the guidance target is the cause of deterioration have a “good” evaluation in the current travel by the processing of the improvement degree determination unit 21e. (Step S405). That is, the control unit 20 acquires the guidance target cause determined in step S320 for the deteriorated section whose past evaluation was “bad” in the guidance target section that passed immediately before. In addition, the control unit 20 compares the cause of deterioration in the deteriorated section in which the previous evaluation was “bad” in the guidance target section that passed immediately before and the cause of the guidance target, and evaluated the past in the guidance target section that passed immediately before. Is a deteriorated section in which “Evil” is “bad”, and the deteriorated section whose cause is the guidance target cause is specified. Further, the control unit 20 refers to the current evaluation of the specified deteriorated section, and when all the current evaluations of the specified deteriorated section are “good”, the guidance target cause is the past cause of deterioration. It is determined that all of the deteriorated sections in the running of the vehicle are “good” in the current running. On the other hand, the control unit 20 is a deteriorated section whose past evaluation is “bad” in the guidance target section, and even one of the deteriorated sections whose cause is the cause of the guidance target is “bad” evaluation in the current travel. If there is, it is not determined that all of the deteriorated sections in the past travel where the cause of the guidance target is the cause of deterioration are “good” evaluation in the current travel. That is, the control unit 20 when the degree of economic travel in the current travel is better than a predetermined level in all of the deteriorated sections that cause the deterioration of the guidance target cause among the deteriorated sections in the past travel in the guidance target section, It is determined that all of the deteriorated sections in the past travel where the cause of the guidance target is the cause of deterioration are “good” evaluation in the current travel.

In step S405, when it is not determined that all of the deteriorated sections in the past travel whose cause for guidance is the cause of deterioration is “good” evaluation in the current travel, the control unit 20 performs the process of the improvement determination unit 21e. The improvement degree is determined to be 0 (step S435). FIGS. 5B to 5E show the current evaluation when the vehicle travels in the guidance target zone Z _n shown in FIG. 5A by a solid line icon that imitates a leaf. The hatched icons indicate that the unit zone is a worse zone. The icon without hatching indicates that the unit section is a unit section having a “good” evaluation (a unit section having a “good” evaluation).

The unit sections Zu ₂ and Zu ₄ in the example shown in FIG. 5A described above are deteriorated sections in which the economic running degree has deteriorated due to the same cause of deterioration as the guidance target cause (cause of deterioration in the deceleration scene) in the past driving. . The unit section Zu ₂ for current evaluation Etb ₂ is in the unit interval Zu ₂ is "bad" in the example shown in FIG. 5B is a deterioration zone. For this reason, when the current evaluation of the guidance target zone Z _n passed immediately before is an evaluation like the example shown in FIG. 5B, the control unit 20 determines the improvement degree to 0 through the determination in step S405.

On the other hand, in step S405, when it is determined that all of the deteriorated sections in the past travel in which the cause of the guidance target is the cause of deterioration are “good” evaluation in the current travel, the control unit 20 performs the processing from step S410 onward. Execute. That is, the control unit 20 is the guidance target section that the guidance target section Z _n shown in FIG. 5A has passed immediately before, and as shown in FIGS. 5C to 5E, at least the unit sections Zu ₂ and Zu ₄ are “ If the evaluation is “good”, the processing after step S410 is executed.

  In step S410, the control unit 20 determines whether or not there is a deteriorated section in the current travel in the guidance target section that has passed immediately before. That is, the control unit 20 refers to the current evaluation of each unit section in the guidance target section acquired in step S400, and when the current evaluation is “good” in all the unit sections, the guidance target section passed immediately before. Therefore, it is determined that there is no worse section in the current run.

In step S410, when it is determined that there is no deterioration section in the current travel in the guidance target section that has passed immediately before, the control unit 20 determines the improvement degree to 3 by the process of the improvement degree determination unit 21e ( Step S415). That is, if this evaluation in all unit section of the guide target section in Z _n as shown in FIG. 5C is a "good", improvement is 3.

On the other hand, if it is not determined in step S410 that there is no deterioration section in the current travel in the guidance target section that has passed immediately before, the control unit 20 has one type of deterioration section remaining in the guidance target section that has passed immediately before. It is determined whether or not there is (step S420). That is, the control unit 20 refers to the current evaluation of each unit section in the guidance target section acquired in step S400, identifies the deterioration section where the current evaluation is “bad”, and identifies the cause of deterioration of each deterioration section. To do. For example, in the example shown in FIG. 5D, the deterioration section Zu ₁ whose evaluation is “evil (Etb ₁ )” remains, and it is specified that the cause of deterioration is the cause of deterioration in the acceleration scene. In the example shown in FIG. 5E, the deterioration sections Zu ₁ and Zu ₃ whose evaluation is “Evil (Etb ₁ , Etb ₃ )” remain, and the cause of the deterioration is the deterioration cause in the acceleration scene and the start scene. The cause of the deterioration is identified.

  And the control part 20 compares the specified deterioration cause, and determines whether the deterioration cause was 1 type. For example, in the example illustrated in FIG. 5D, it is determined that the cause of deterioration is one type of cause of deterioration in the acceleration scene. In the example shown in FIG. 5E, since there are two types of causes of deterioration, namely, a cause of deterioration in the acceleration scene and a cause of deterioration in the start-up scene, it is not determined that there is one type of cause of deterioration.

  If it is determined in step S420 that there is only one type of deteriorated section remaining in the guidance target section that has passed immediately before, the control unit 20 determines the improvement level to 2 by the process of the improvement level determination unit 21e (step S420). S425). That is, as shown in FIG. 5D, when there is one type of deterioration cause in the remaining deterioration section, the degree of improvement is set to 2.

  On the other hand, if it is not determined in step S420 that there is only one type of deteriorated section remaining in the guidance target section that has passed immediately before, the control unit 20 determines the improvement level to 1 by the processing of the improvement level determination unit 21e ( Step S430). That is, as shown in FIG. 5E, when there are two types of deterioration causes in the remaining deterioration section, the improvement degree is set to 1.

  When the improvement degree is determined by any one of steps S415, S425, S430, and S435, the control unit 20 guides the improvement degree by the processing of the after-travel guidance unit 21f (step S440). That is, the control unit 20 extracts voice information indicating the degree of improvement determined in any of steps S415, S425, S430, and S435 from the voice guidance information 30c and outputs the voice information to the speaker of the user I / F unit 44. . As a result, a sound indicating that the improvement degree is any one of 0 to 3 is output from the speaker of the user I / F unit 44.

(6) Other embodiments:
The above embodiment is an example for carrying out the present invention, and pre-travel guidance is performed in order to improve the economic travel in the deteriorated section where the economic travel in the past travel was bad. Various other embodiments can be adopted as long as the degree of improvement in the economic running degree when the vehicle is running is guided. For example, the past evaluation, the cause of deterioration, and the current evaluation may be acquired from an apparatus that is not mounted on the vehicle, for example, 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 is an economic driving degree (in the case of an electric vehicle, a unit distance in a hybrid vehicle or an electric vehicle). It may be configured to guide the cause of deterioration of the power consumption per unit area).

  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.

  Furthermore, guidance other than voice guidance, for example, guidance based on images, may be used together as pre-travel guidance or post-travel guidance. As guidance by an image, guidance etc. which show on a map which displayed an icon which shows for every unit section whether it is a deterioration section as shown in Drawings 5A-5E etc. are mentioned, for example. Of course, in this case, an image indicating the cause of deterioration may be displayed on the display unit. Moreover, you may perform guidance which shows the image which shows the numerical value and graph of an improvement degree on the map displayed on the display part as guidance after driving | running | working.

  Further, the economic driving degree may be the fuel consumption itself in addition to the vehicle operation (vehicle speed or acceleration) as described above, or may be an evaluation of a driving operation that affects the fuel consumption. The deteriorated section only needs to be a section including a point where the economic running degree is worse than a predetermined level, and the deteriorated section may be a single point or may have a length. The length may be a constant distance or may vary. For example, when the points where the economic running degree is worse than a predetermined level are continuous, the deteriorated section is a section having a length. In this case, a section in which points where the economic running rate is lower than a predetermined level may be continued as one section, or a plurality of unit sections defined for each fixed distance are regarded as continuously deteriorated sections. May be. The predetermined level may be a value that gradually varies in accordance with improvement in driving technology or the like.

  Further, the pre-travel guidance is guidance that is performed for at least one deteriorated section in the guide target section, and may be for a plurality of deteriorated sections. When targeting a plurality of deteriorated sections, the pre-travel guidance may be performed once or a plurality of times. Furthermore, it may be configured such that the pre-travel guidance for each deteriorated section is performed so that the correspondence between the pre-travel guidance and the deteriorated section is recognized, or the correspondence between the pre-travel guidance and the deteriorated section is unknown It may be configured such that pre-travel guidance is performed. Although the above-mentioned embodiment is the latter case, if the degree of improvement in the economic driving degree is indicated by the post-travel guidance, driving assistance for improving the economic driving degree can be performed.

  The timing for recognizing whether or not the improvement according to the pre-travel guidance is made is not limited to immediately after passing through the guidance target section. For example, the cumulative improvement in the degree of economic driving according to the degree of improvement in the section from the start to the end of the current run in the worse section that caused the cause of deterioration in the past section in the guide section The control unit 20 is configured to determine the degree. And it is good also as a structure which the control part 20 performs guidance which shows a cumulative improvement degree after completion | finish of this driving | running | working. According to this configuration, the driver can recognize the degree of improvement in the economic driving degree according to the pre-travel guidance in the section from the start to the end of the current travel, and continuously travel while traveling. It can be determined whether or not the economic driving degree has been improved according to the previous guidance.

  DESCRIPTION OF SYMBOLS 10 ... Navigation terminal, 20 ... Control part, 21 ... Driving assistance program, 21a ... Current travel history acquisition part, 21b ... Deterioration section acquisition part, 21c ... Determination section setting part, 21d ... Pre-travel guide part, 21e ... Degree of improvement determination , 21f: Post-travel guidance unit, 30 ... Recording medium, 30a ... Map information, 30b ... Evaluation information, 30c ... Voice guidance information, 41 ... GPS receiver, 42 ... Vehicle speed sensor, 43 ... Gyro sensor, 44 ... User I / F part

Claims (9)

Before the vehicle enters the guidance target section including at least one worsening section whose economic driving degree in the past traveling of the vehicle is worse than a predetermined level, at least one of the worsening sections in the guidance target section Pre-travel guidance means for performing pre-travel guidance, which is guidance for improving the economic travel of the vehicle,
Improvement degree determining means for determining the degree of improvement in the economic driving degree in the guidance target section according to the degree to which the economic driving degree in the deteriorated section where the pre-travel guidance was performed is improved in the current driving,
Post-travel guidance means for performing post-travel guidance that is guidance indicating the degree of improvement;
A driving support system comprising: The pre-travel guidance means
The cause of deterioration of the economic driving degree for at least one of the deteriorated sections in the previous travel in the guidance target section is a cause of the guidance target, and performs the pre-travel guidance regarding the cause of the guidance target,
The improvement degree determining means includes:
In the case where the degree of economic travel in the current travel is better than the predetermined level in all of the deteriorated sections that cause the deterioration of the guide target cause among the deteriorated sections in the past travel in the guidance target section, Determining the degree of improvement so that the degree of improvement is higher than when the economic running degree in the current run is worse than the predetermined level in at least one of the deteriorated sections whose cause is a guidance target cause;
The driving support system according to claim 1. The improvement degree determining means includes:
In the case where the degree of economic travel in the current travel is better than the predetermined level in all of the deteriorated sections that cause the deterioration of the guide target cause among the deteriorated sections in the past travel in the guidance target section, Indicates that economic driving in the guidance section has improved,
In the case where at least one of the deteriorated sections having the cause of deterioration as a cause of deterioration among the deteriorated sections in the past travel in the guidance target section is worse than the predetermined level in the current travel , Determining the degree of improvement to indicate that the economic driving degree in the guidance target section has not improved,
The driving support system according to claim 2. The improvement degree determining means includes:
When the economic running degree in the current run is better than the predetermined level in all of the deteriorated sections that cause the guide target cause to deteriorate among the deteriorated sections in the past run in the guidance target section,
In the deteriorated section where the cause of deterioration is different from the cause of the guide object among the deteriorated sections in the past travel in the guidance target section, when the economic driving degree in the current travel is better than the predetermined level, the predetermined Determining the degree of improvement so that the degree of improvement is higher than when it is worse than the level of
The driving support system according to claim 2 or claim 3. The improvement degree determining means includes:
In the deteriorated section where the cause of deterioration is different from the cause of the guide object among the deteriorated sections in the past travel in the guidance target section, the current travel time is worse than the predetermined level even in the current travel. The cause of deterioration in the worsening section where the economic running degree was worse than the predetermined level also in the running of, and determine the degree of improvement according to the number of specified causes of deterioration,
The driving support system according to claim 4. The improvement degree determining means includes:
According to the degree to which the economic driving degree is improved in the period from the start to the end of the current travel in the worsened section having the cause of the guidance target as the cause of deterioration in the worsened section in the past travel in the guidance target section. To determine the cumulative improvement in economic driving,
The after-travel guidance means is
After the end of this run, we will give guidance showing the cumulative improvement,
The driving support system according to any one of claims 1 to 5. The pre-travel guidance means performs the pre-travel guidance before the vehicle enters the guidance target section including a plurality of deteriorated sections whose economic travel per unit section is worse than the predetermined level.
The driving assistance system in any one of Claims 1-6. Before the vehicle enters the guidance target section including at least one worsening section whose economic driving degree in the past traveling of the vehicle is worse than a predetermined level, at least one of the worsening sections in the guidance target section A pre-travel guidance process for performing pre-travel guidance, which is guidance for improving the economic travel of the vehicle,
An improvement degree determination step for determining an improvement degree in which the economic driving degree in the guidance target section is improved according to the degree to which the economic driving degree in the deteriorated section where the pre-travel guidance is performed is improved in the current driving,
A post-travel guidance process for performing post-travel guidance, which is a guide indicating the degree of improvement;
Driving support method including. Before the vehicle enters the guidance target section including at least one worsening section whose economic driving degree in the past traveling of the vehicle is worse than a predetermined level, at least one of the worsening sections in the guidance target section A pre-travel guidance function for performing pre-travel guidance, which is a guide for improving the economic travel of the vehicle,
An improvement degree determination function for determining an improvement degree in which the economic driving degree in the guidance target section is improved according to the degree to which the economic driving degree in the deteriorated section where the pre-travel guidance is performed is improved in the current driving;
A post-travel guidance function for performing post-travel guidance that is a guide indicating the degree of improvement;
A driving support program characterized by causing a computer to realize the above.

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