WO2013005293A1 - 車両用運転支援装置 - Google Patents
車両用運転支援装置 Download PDFInfo
- Publication number
- WO2013005293A1 WO2013005293A1 PCT/JP2011/065302 JP2011065302W WO2013005293A1 WO 2013005293 A1 WO2013005293 A1 WO 2013005293A1 JP 2011065302 W JP2011065302 W JP 2011065302W WO 2013005293 A1 WO2013005293 A1 WO 2013005293A1
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- vehicle
- driving
- virtual
- driver
- traveling
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- 238000000034 method Methods 0.000 description 25
- 238000005457 optimization Methods 0.000 description 18
- 238000000605 extraction Methods 0.000 description 17
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- 238000010586 diagram Methods 0.000 description 15
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- 239000011521 glass Substances 0.000 description 5
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- 230000000295 complement effect Effects 0.000 description 4
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- 238000013459 approach Methods 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/167—Driving aids for lane monitoring, lane changing, e.g. blind spot detection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
- B60K35/23—Head-up displays [HUD]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/28—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
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- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
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- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/77—Instrument locations other than the dashboard
- B60K2360/785—Instrument locations other than the dashboard on or in relation to the windshield or windows
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/043—Identity of occupants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2556/00—Input parameters relating to data
- B60W2556/10—Historical data
Definitions
- the present invention relates to a technique for displaying a virtual preceding vehicle to assist the driver in driving.
- a vehicle driving support device that displays an image of a virtual preceding vehicle so as to be visually recognized by a vehicle driver.
- the display apparatus for vehicles of patent document 1 is the example.
- the vehicle display device of Patent Document 1 displays the virtual preceding vehicle on the transmission glass in front of the driver as if the vehicle is traveling in a lane in the traveling direction of the vehicle as viewed from the driver.
- the virtual leading vehicle is displayed so that the virtual leading vehicle is traveling at the position of the vehicle after a predetermined time of the vehicle has elapsed.
- JP 2002-144913 A JP 2005-069800 A JP 2005-106663 A
- Drivers have driving habits or driving characteristics when driving a vehicle, and the driving characteristics differ from one driver to another. For example, the degree of turning radius at which vehicle speed and the road having a turning radius vary depending on individual drivers. And, when the driver follows the preceding vehicle and drives the vehicle, when following the preceding vehicle that travels with driving characteristics close to herself follows the preceding vehicle that travels with driving characteristics completely different from herself Compared with the driver, the driver can easily follow the preceding vehicle.
- the vehicle display device disclosed in Patent Document 1 does not display the virtual preceding vehicle in consideration of the driving characteristics of the driver. That is, the virtual leading vehicle displayed by the vehicle display device of Patent Document 1 exhibits a behavior unrelated to the driving characteristics of the driver. Therefore, the driver may feel uncomfortable with the virtual preceding vehicle displayed by the vehicle display device of Patent Document 1.
- the vehicle display device of Patent Document 1 further reduces the driving burden on the driver. There was a problem that there was still room to do. Such a problem is not yet known.
- the present invention has been made against the background of the above circumstances, and the purpose of the present invention is to display the virtual preceding vehicle with a little sense of incongruity and appropriately reduce the driving burden on the driver.
- the object is to provide a driving support device for a vehicle.
- the gist of the first invention for achieving the above object is that (a) a virtual preceding vehicle virtualized so as to travel in front of the traveling vehicle is visually recognized by the driver of the vehicle. (B) storing a driving history of driving the vehicle by the driver, and (c) the virtual leading vehicle based on the driving history. The running state of the vehicle is determined.
- the driver seems to follow the virtual preceding vehicle because the virtual leading vehicle appears to be traveling according to the driving characteristics of the driver or the driving characteristics close thereto. It is difficult to feel uncomfortable when driving the vehicle. Therefore, it is possible to appropriately reduce the driving burden on the driver as compared with the case where the driving characteristics of the driver itself are not reflected at all in the behavior of the virtual preceding vehicle.
- the gist of the second invention is the vehicle driving support device according to the first invention, wherein the vehicle is traveling on a road not included in the driving history.
- a driving state of the virtual preceding vehicle is determined based on road information of a road on which the virtual leading vehicle is virtually traveled based on driving characteristics of the driver estimated based on information related to traveling. .
- the driving characteristics of the driver can be reflected in the behavior of the virtual preceding vehicle. Therefore, it is possible to appropriately reduce the driving burden on the driver even on the road on which the driver travels for the first time.
- the case where the vehicle is traveling on a road that is not included in the driving history is, for example, a case where the vehicle is traveling on a road on which the vehicle travels for the first time.
- the gist of the third invention is the vehicle driving support device according to the first invention or the second invention according to the driving tendency of the driver that is alternatively selected from predetermined options. Then, the running state of the virtual preceding vehicle is switched. In this way, the traveling state of the vehicle traveling so as to follow the virtual preceding vehicle depends on the driving tendency of the driver, for example, focusing on fuel efficiency of the vehicle or focusing on power performance. Since it approaches the traveling state of the switched virtual preceding vehicle, the driving tendency of the driver can be easily reflected in the traveling state of the vehicle driven by the driver.
- a vehicle driving support apparatus according to any one of the first to third aspects, wherein: (a) the vehicle and the actual preceding vehicle are running while the vehicle is running; Storing a relationship between an inter-vehicle distance between the vehicle and the vehicle speed of the vehicle; and (b) an inter-vehicle distance between the vehicle and the virtual preceding vehicle based on the stored relationship between the inter-vehicle distance and the vehicle speed. It is characterized by determining the distance. In this way, since the driving characteristics of the driver are reflected in the inter-vehicle distance between the vehicle and the virtual preceding vehicle, for example, the inter-vehicle distance between the vehicle and the virtual leading vehicle is the driving characteristic of the driver. Compared with the case where the determination is made independently of the vehicle, the driver can easily drive the vehicle so as to follow the virtual preceding vehicle.
- a fifth aspect of the present invention is the vehicle driving support apparatus according to any one of the first to fourth aspects, wherein the image of the virtual preceding vehicle is displayed on a windshield of the vehicle. It is characterized by that. In this way, the driver can visually recognize the scenery that is visible in the vehicle traveling direction and the image of the virtual preceding vehicle, so that the driver who drives the traveling vehicle can easily view the virtual vehicle. It is possible to display an image of a preceding vehicle.
- the vehicle is driven by one of a plurality of drivers
- the driving history is stored for each driver
- the vehicle The driving state of the virtual preceding vehicle is determined based on the driving history corresponding to the driver. In this way, even if the driver of the vehicle becomes any one of the plurality of drivers, the driver feels uncomfortable when driving the vehicle with the intention of following the virtual preceding vehicle. It is possible to appropriately reduce the driving burden on the driver.
- the traveling state of the virtual preceding vehicle is determined.
- the case where the vehicle is traveling on a road included in the driving history is, for example, a case where the vehicle is traveling on a road that has traveled in the past.
- FIG. 2 is a diagram showing a virtual preceding vehicle displayed as a virtual image on the windshield in the vehicle of FIG. 1. It is a functional block diagram for demonstrating the principal part of the control function with which the electronic control apparatus which controls the vehicle of FIG. 1 was equipped. It is a functional block diagram for demonstrating in detail the virtual preceding vehicle control part contained in the electronic controller of FIG. It is a figure for demonstrating how the road contained in a map is memorize
- FIG. 4 is a diagram illustrating a driving history of a driver stored in a traveling history database of the electronic control device of FIG.
- FIG. 4 is a diagram illustrating an inter-vehicle distance map for a virtual leading vehicle that is used when the electronic control device of FIG. 3 determines an inter-vehicle distance between the virtual leading vehicle and the vehicle of FIG. 1.
- FIG. 2 is a diagram for explaining a traveling pattern of a virtual leading vehicle generated based on a traveling history (driving history) in order to determine the traveling state of the virtual leading vehicle in the vehicle of FIG. 1.
- a traveling history driving history
- an estimated driver driving characteristic that is an estimated driving characteristic of the driver is illustrated, and how the provisional driving state of the virtual preceding vehicle is determined from the estimated driver driving characteristic. It is a figure for demonstrating. It is a figure for demonstrating the method to change the virtual driving
- FIG. 2 is a flowchart for explaining a main part of a control operation of the electronic control device of FIG. 1, that is, a control operation for determining a traveling state of a virtual leading vehicle and displaying the virtual leading vehicle. It is the figure which showed the subroutine performed by SA3 of FIG.
- FIG. 7 is a diagram showing an example in which the travel history shown in FIG. 6 is accumulated and stored for each driver.
- FIG. 1 is a diagram conceptually showing the configuration of a drive system according to a vehicle 10 which is an embodiment of the present invention.
- the vehicle 10 shown in FIG. 1 may be an electric vehicle or a hybrid vehicle.
- the vehicle 10 is a normal engine vehicle using an engine as a driving force source for traveling.
- the vehicle 10 includes an electronic control device 12 that performs various controls in the vehicle 10. And the control system which is illustrated in FIG. 1 is provided.
- the electronic control unit 12 performs various types of control such as engine drive control and automatic transmission shift control by performing signal processing according to a program stored in advance in the ROM while the CPU uses the temporary storage function of the RAM. Execute. Further, in order to reduce the driving burden on the driver, the electronic control unit 12 is provided with a virtual preceding vehicle 14 that is virtual as if traveling in front of the traveling vehicle 10 as shown in FIG.
- the vehicle 10 has a function as a vehicle driving support device that displays an image of the virtual preceding vehicle 14 so as to be visually recognized by the driver of the vehicle 10.
- various input signals are supplied to the electronic control device 12 from a vehicle 10 driven by the driver, that is, each sensor provided in the host vehicle.
- the operation amount BRK (brake) of the foot brake pedal based on the accelerator operation amount Acc that is the depression amount of the accelerator pedal 16, that is, the signal from the accelerator opening sensor 18 that represents the accelerator opening Acc, and the master cylinder hydraulic pressure of the foot brake device.
- a signal from the vehicle speed sensor 22 indicating the vehicle speed V of the vehicle 10
- a steering angle STR of the steering wheel 24 that is zero when the vehicle is traveling straight.
- a signal from the acceleration sensor 30 representing acceleration, a signal from the yaw rate sensor 32 representing the yaw rate of the vehicle 10, and Beauty, signals and the like that receives a signal from a satellite represents the position and traveling direction of the vehicle 10 from GPS controller 34 for detecting the position and traveling direction of the vehicle 10 is input to the electronic control unit 12.
- the vehicle 10 includes a navigation system 36, and navigation information such as a planned travel route on which the vehicle 10 is scheduled to travel and a destination to which the vehicle 10 travels is electronically controlled from the navigation system 36. Input to the device 12.
- the inter-vehicle distance DSCC detected by the inter-vehicle distance sensor 28 is infinite if there is no preceding vehicle.
- a command signal for displaying the virtual preceding vehicle 14 as a virtual image on the transmission glass in front of the driver, that is, the windshield 40 (see FIG. 2) is supplied from the electronic control device 12 to the display device 38.
- the display device 38 is attached to the upper part of the instrument panel, for example.
- the display device 38 displays an image of the virtual leading vehicle 14 on the windshield 40 by a method such as a hologram in accordance with a command from the electronic control device 12. Then, the image of the virtual leading vehicle 14 is visually recognized by the driver as if the virtual leading vehicle 14 is traveling ahead of the traveling vehicle 10.
- FIG. 3 is a functional block diagram for explaining the main part of the control function provided in the electronic control unit 12.
- the electronic control unit 12 is a map database 50, a travel history database 52, a positioning unit 54 as positioning means, a map matching unit 56 as map matching means, and a travel history generating means.
- a travel history generation unit 58, a virtual leading vehicle control unit 60 that is a virtual leading vehicle control unit, and a virtual leading vehicle display unit 62 that is a virtual leading vehicle display unit are provided.
- FIG. 4 is a functional block diagram for explaining the virtual preceding vehicle control unit 60 in detail. As shown in FIG.
- the virtual preceding vehicle control unit 60 includes a travel pattern generation unit 64 that is a travel pattern generation unit, a drive characteristic extraction unit 66 that is a drive characteristic extraction unit, and a travel that is a travel state optimization unit.
- a state optimizing unit 68 is provided.
- map database 50 map data, which is various information related to the map, for example, road network data indicating road connection relations, and the like are stored in advance. That is, the map database 50 is a storage device in which the map data is stored in advance.
- FIG. 5 is a diagram for explaining how roads included in the map are stored in the map data stored in the map database 50. That is, it is a diagram for explaining the road network data.
- the road in the map data is managed by being divided into a plurality of segments 74, which are road units. That is, each segment 74 corresponds to a part of the road. Each segment 74 is given a road number in order to identify each segment 74. For example, FIG.
- the segments 74 are connected to each other by nodes 76 (white circles in FIG. 5) or complementary shape points 78 (black circles in FIG. 5) corresponding to actual roads.
- the node 76 is a connection point where three or more segments 74 are connected to each other, and corresponds to an intersection on an actual road.
- the complementary shape point 78 is a connection point at which the two segments 74 are connected to each other, and is a point for indicating a change in the shape of the road corresponding to the two segments 74.
- a segment 74 that connects the two nodes 76 in series without passing through another node 76 is called a link as a whole. For example, in FIG.
- the segments 74 of road numbers [3] and [4] connected to each other via the complementary shape point 78 constitute one link, and the segment 74 of road number [6] One link is configured as it is.
- road information relating to the road corresponding to each of the segments 74 specifically, road information including at least information related to the road shape such as the position, length, gradient, road width, and radius of curvature of the road is stored for each road number. And constitutes the map data.
- the plurality of segments 74 are connected to each other at the node 76 or the complementary shape point 78 and stored according to the actual road, thereby constituting the map data.
- the road corresponding to the segment 74 of the road number that is, the road of the road number can be specified, and the road information of the road specified by the road number is also specified. can do.
- a road specified by one road number in other words, a road corresponding to one segment 74 is referred to as a unit road.
- vehicle travel-related information related to the travel of the vehicle 10 while the vehicle is traveling.
- the vehicle travel-related information is acquired based on signals from the sensors shown in FIG. 1 and the like, and the position of the vehicle 10 (own vehicle position), the vehicle speed V, the traveling direction, and the attitude (for example, the vehicle 10 Turning radius), accelerator opening Acc, and brake operation amount BRK.
- the vehicle 10 is a hybrid vehicle
- information unique to the hybrid vehicle such as the remaining charge SOC of the power storage device may be included in the vehicle travel related information.
- the positioning unit 54 determines that the preceding vehicle distance DSCC detected by the inter-vehicle distance sensor 28 is equal to or greater than a predetermined preceding vehicle determination distance that is experimentally set in advance so that the presence or absence of the preceding vehicle can be determined. It is assumed that there is no vehicle. Then, when there is the preceding vehicle, the positioning unit 54 sequentially acquires the inter-vehicle distance DSCC detected by the inter-vehicle distance sensor 28 in addition to the vehicle travel related information.
- the map matching unit 56 uses the map data stored in the map database 50 in the same manner that the general navigation system 36 specifies the unit road (segment 74) corresponding to the vehicle position from the vehicle position.
- the unit road (segment 74) on which the vehicle 10 is currently traveling is sequentially identified based on the own vehicle position acquired by the positioning unit 54, for example, the own position represented by latitude and longitude. And the road number of the specified unit road is acquired sequentially. That is, the road number of the unit road on which the vehicle 10 is currently traveling is sequentially identified.
- the host vehicle position acquired by the positioning unit 54 is collated with the map data, and the map matching for specifying the unit road on which the vehicle 10 is currently traveling or the road number of the unit road is sequentially performed.
- the unit road on which the vehicle 10 is currently traveling can be identified.
- the road (unit road) currently being traveled is identified.
- the state where the vehicle 10 has been able to do is said to be on-road.
- a state in which the road stored in the map database 50 does not exist at the vehicle position and the currently running road cannot be specified is referred to as the vehicle 10 being off-road.
- the travel history generation unit 58 is based on the vehicle travel-related information acquired by the positioning unit 54 and the road number of the unit road specified by the map matching unit 56.
- the driving history 80 in which the driver has driven the vehicle 10, that is, the traveling history 80 of the vehicle 10 is stored in the traveling history database 52. That is, the traveling history 80 is accumulated as the traveling vehicle 10 advances. In other words, the travel history (driving history) 80 is learned.
- the travel history database 52 is a storage device that stores the travel history (driving history) 80 and may be referred to as a driving history database.
- FIG. 6 shows an example of the stored contents of the travel history database 52.
- the travel history 80 stored in the travel history database 52 is the road number of a road (unit road) corresponding to one segment 74, and the vehicle 10 travels on the unit road of that road number.
- the average vehicle speed Vav when the vehicle was traveling, the elapsed time required for the vehicle 10 to pass through the unit road, the driver operation when the vehicle 10 was traveling on the unit road, and the vehicle 10 traveled on the unit road It consists of travel date and time, etc., and is distinguished for each road number.
- the travel history 80 is the same road number, when the vehicle 10 goes straight out of the unit road of the road number, and when the vehicle 10 turns right and left from the unit road, A case where the vehicle 10 exits from the unit road and stops at an intersection corresponding to the node 76, and is configured to be distinguished from each other, and further, a forward path corresponding to a traveling direction when the vehicle 10 travels on the unit road of the road number It is configured separately from the return route.
- the average vehicle speed Vav is calculated, for example, by dividing the length of the unit road by the elapsed time.
- the driver operation in the travel history 80 is specifically an accelerator operation and a brake operation, and an average accelerator opening Acc and an average brake operation amount BRK are stored as the driver operation.
- the driver operation may include operations other than the accelerator operation and the brake operation, such as the operation of the blinker.
- the travel date and time may be any date and time as long as it is limited to, for example, the date and time when the vehicle 10 enters the unit road or the date and time when the vehicle 10 exits the unit road.
- the right / left turn of the vehicle 10 can be determined from, for example, a change in the traveling direction of the vehicle 10 acquired by the positioning unit 54, and the forward path and the backward path can be distinguished from the traveling direction of the vehicle 10.
- the travel history generation unit 58 sequentially receives the vehicle travel related information acquired by the positioning unit 54 and the road number of the unit road specified by the map matching unit 56.
- the traveling history generation unit 58 receives the received vehicle traveling related information and The travel data based on the road number is added to the travel history 80 and the travel history 80 is accumulated.
- the travel history 80 shown in FIG. 6 there are two travel data of the road number [1] when traveling straight on the forward path, but these travel dates are different from each other.
- history 80 of FIG. 6 is illustrated, for example, the other item related to the driving
- the travel history generation unit 58 accumulates the travel history 80 as described above, and sequentially determines the inter-vehicle distance DSCC detected by the inter-vehicle distance sensor 28 and the vehicle speed V detected by the vehicle speed sensor 22 from the positioning unit 54. I have received it. The inter-vehicle distance DSCC and the vehicle speed V are sequentially measured simultaneously or substantially simultaneously. Then, the travel history generation unit 58 sequentially stores the relationship between the inter-vehicle distance DSCC received from the positioning unit 54 and the vehicle speed V, that is, the actual inter-vehicle distance vehicle speed related point Pvds.
- the relationship between the inter-vehicle distance DSCC and the vehicle speed V is received, and the relationship, that is, the actual inter-vehicle distance vehicle speed related point Pvds is stored and stored.
- the stored inter-vehicle distance vehicle speed related point Pvds is exemplified in FIG. Each black dot shown in FIG. 7 represents the actual inter-vehicle distance vehicle speed related point Pvds stored sequentially.
- the travel history generation unit 58 determines the travel position of the virtual preceding vehicle 14 as shown by the solid line Lvds in FIG. 7.
- a vehicle-to-vehicle distance map Lvds that is a relationship between the vehicle speed V and the vehicle speed V is generated.
- the inter-vehicle distance map Lvds for the virtual preceding vehicle is approximated to each of the plurality of actual inter-vehicle distance vehicle speed related points Pvds by, for example, the least square method, and is obtained as a relationship between the continuous inter-vehicle distance DSCC and the vehicle speed V. .
- the virtual preceding vehicle inter-vehicle distance map Lvds is preferably updated each time the actual inter-vehicle distance vehicle speed related point Pvds is added.
- the virtual leading vehicle control unit 60 sequentially determines the traveling state of the virtual leading vehicle 14 and sequentially instructs the virtual leading vehicle display unit 62 to display the virtual leading vehicle 14 in the traveling state.
- the travel pattern generation unit 64 included in the virtual leading vehicle control unit 60 includes the vehicle travel related information acquired by the positioning unit 54 and the unit road on which the vehicle 10 specified by the map matching unit 56 is currently traveling. The road number is sequentially received.
- the vehicle 10 is currently traveling on a road (traveled road) included in the travel history (driving history) 80
- the virtual leading vehicle 14 that is a basis for determining the traveling state of the virtual leading vehicle 14 is used.
- the travel pattern is generated based on the travel history 80.
- the traveling state of the virtual leading vehicle 14 is, for example, the vehicle speed V, the posture (orientation), etc. of the virtual leading vehicle 14 recognized by the driver.
- the traveled road is a road on which the driver has traveled in the past with the vehicle 10, for example. How the travel pattern of the virtual leading vehicle 14 is generated based on the travel history 80 will be described with reference to FIG.
- FIG. 8 is a diagram for explaining a traveling pattern of the virtual leading vehicle 14 generated based on the traveling history 80 in order to determine the traveling state of the virtual leading vehicle 14. Since the virtual preceding vehicle control unit 60 can sequentially grasp the own vehicle position from the road number received from the map matching unit 56, the vehicle from the own vehicle position based on the own vehicle position indicated by the point P0 as shown in FIG. Based on the travel history 80, for example, up to a predetermined distance in the 10 traveling direction, a relationship between the traveling direction distance from the vehicle position, the vehicle speed V, the accelerator opening Acc, and the brake operation amount BRK is generated. This generated relationship is a travel pattern of the virtual preceding vehicle 14, that is, a virtual travel pattern.
- the course of the vehicle 10 in the virtual traveling pattern may be set in the map data stored in the map database 50 as the vehicle 10 traveling straight from the own vehicle position, If the planned route is set, the vehicle 10 may be set to travel according to the planned travel route.
- the vehicle speed V in the virtual travel pattern is the average of the average vehicle speed Vav of travel data in the travel history 80 in which the road number, straight / right / left turn / stop, and forward / return are the same as the virtual travel pattern.
- the road number or the like may be the average vehicle speed Vav of the latest travel data that matches the virtual travel pattern.
- the accelerator opening Acc and the brake operation amount BRK in the virtual travel pattern are the same as the vehicle speed V. 8 and 10 indicate roads on which the vehicle 10 and the virtual preceding vehicle 14 are assumed to travel in the virtual travel pattern.
- the traveling state of the virtual leading vehicle 14 is determined according to the virtual traveling pattern generated in this way, as shown in FIG. 8, the virtual leading vehicle 14 is a predetermined position that is relatively determined based on the vehicle position. Therefore, the traveling state of the virtual leading vehicle 14 is determined from the virtual traveling pattern based on the assumed position of the virtual leading vehicle 14. For example, in FIG. 8, the virtual leading vehicle 14 that is traveling at the assumed position indicated by the point P1 is illustrated, so the vehicle speed V of the virtual leading vehicle 14 is the vehicle speed Vp1 indicated by the point P1.
- the driving characteristic extraction unit 66 included in the virtual preceding vehicle control unit 60 sequentially receives the vehicle travel related information acquired by the positioning unit 54. Then, based on the vehicle travel-related information, for example, based on information representing the travel state indicated by the vehicle speed V and the turning radius of the vehicle 10, the driver is a driver-specific characteristic related to the travel state of the vehicle 10. Estimate the driving characteristics of The estimated driving characteristics (estimated driver driving characteristics) of the driver are shown as solid lines Lca, Lcb, and Lcc in FIG. 9B. A method of obtaining the estimated driver driving characteristics will be described with reference to FIG. 9B.
- FIG. 9B is an example in which three estimated driver driving characteristics Lca, Lcb, and Lcc are set in order from the high vehicle speed side, and therefore data for obtaining the estimated driver driving characteristic Lca in order from the high vehicle speed side.
- a reference range WLca, a data reference range WLcb for obtaining the estimated driver driving characteristic Lcb, and a data reference range WLcc for obtaining the estimated driver driving characteristic Lcc are provided in advance.
- the driving characteristic extraction unit 66 obtains the estimated driver driving characteristic Lca for all the points within the data reference range WLca among the points indicating the vehicle speed V and the turning radius included in the vehicle travel related information obtained sequentially. Set as a curve approximating the point.
- a method for obtaining the approximate curve may be a general method and is not particularly limited.
- Other estimated driver driving characteristics Lcb and Lcc are set in the same manner as the estimated driver driving characteristics Lca.
- the estimated driver driving characteristic is set based on the vehicle travel-related information obtained sequentially, so that the driving characteristic extraction unit 66 obtains the estimated driver every time the vehicle travel-related information is obtained. Update operating characteristics.
- the driving characteristic extraction unit 66 determines the virtual preceding vehicle 14 from the estimated driver driving characteristics.
- the provisional traveling state that is, the provisional traveling state of the virtual preceding vehicle 14 is sequentially determined.
- the temporary travel state is referred to because the temporary travel state may be changed by the travel state optimization unit 68. A method for determining the provisional traveling state will be described with reference to the example of FIG.
- the driving characteristic extraction unit 66 first determines the inter-vehicle distance from the inter-vehicle distance map Lvds for the virtual preceding vehicle shown in FIG. 7 based on the vehicle speed V of the vehicle 10 obtained from the positioning unit 54. Ask for DSCC.
- the inter-vehicle distance DSCC calculated from the inter-vehicle distance map Lvds for the virtual preceding vehicle is the inter-vehicle distance DSCCx for the virtual preceding vehicle that is assumed between the vehicle 10 and the virtual preceding vehicle 14. That is, as shown in FIG.
- the driving characteristic extraction unit 66 uses the road number obtained from the map matching unit 56, that is, the own vehicle position indicated by the road number as a reference, the inter-vehicle distance DSCCx for the virtual preceding vehicle. Assuming that the virtual leading vehicle 14 is traveling ahead in the traveling direction, the assumed position of the virtual leading vehicle 14 is determined. The course of the vehicle 10 at this time is set, for example, as that in which the vehicle 10 goes straight from the vehicle position in the map data stored in the map database 50, as in the generation of the virtual travel pattern described above. Alternatively, if the planned travel route is set in the navigation system 36, the vehicle 10 may be set to travel according to the planned travel route. In addition, in FIG.
- the driving characteristic extraction unit 66 sets a point PC1 indicating the turning radius and the vehicle speed V of the vehicle 10 obtained from the positioning unit 54 among the three estimated driver driving characteristics Lca, Lcb, and Lcc. The closest estimated driver driving characteristic Lcb is selected.
- the driving characteristic extraction unit 66 acquires the curvature radius of the road at the assumed position of the virtual preceding vehicle 14 determined from the map data stored in the map database 50, and uses the curvature radius of the virtual leading vehicle 14. Turn radius.
- the vehicle speed Vpc2 indicated by the point PC2 in FIG. 9B is determined as the vehicle speed V of the virtual leading vehicle 14 from the selected estimated driver driving characteristic Lcb.
- the driving characteristic extraction unit 66 determines the traveling state (for example, the vehicle speed V and the turning radius) of the vehicle 10 obtained from the positioning unit 54 based on the estimated driver driving characteristic shown in FIG. Based on the road information (for example, the curvature radius of the road) of the road on which the vehicle 14 is virtually traveled, that is, the road information of the road corresponding to the assumed position, the provisional travel state of the virtual leading vehicle 14 is determined.
- the road information for example, the curvature radius of the road
- the provisional travel state of the virtual leading vehicle 14 is determined.
- RDx in FIG. 9A indicates a road on which the vehicle 10 and the virtual preceding vehicle 14 are assumed to travel when determining the provisional travel state.
- the traveling state optimization unit 68 switches the traveling state of the virtual preceding vehicle 14 according to the driving tendency of the driver. Specifically, when the vehicle 10 is currently traveling on the traveled road, the travel state optimization unit 68 generates the virtual travel pattern (hereinafter referred to as a virtual travel reference pattern) generated by the travel pattern generation unit 64. ) Is changed according to the driving tendency of the driver, and the traveling state of the virtual preceding vehicle 14 is determined. Further, when the vehicle 10 is currently traveling on the untraveled road, the provisional traveling state of the virtual leading vehicle 14 determined by the driving characteristic extraction unit 66 is changed according to the driving tendency of the driver, The changed one is determined as the traveling state of the virtual preceding vehicle 14.
- a virtual travel reference pattern generated by the travel pattern generation unit 64.
- the driving tendency of the driver is a tendency of the vehicle performance that the driver demands when driving, such as which of the fuel efficiency performance and the power performance is important.
- the driving tendency of the driver is alternatively selected from predetermined options such as a driving tendency focusing on fuel efficiency and a driving tendency focusing on power performance.
- the driving state optimization unit 68 places importance on power performance. It is determined that the driving tendency of the driver is selected.
- the sport mode switch is OFF, it is determined that the driving tendency of the driver who places importance on fuel efficiency is selected.
- FIG. 10 is a diagram for explaining a method of changing the virtual running reference pattern shown in FIG. 8 according to the driving tendency of the driver who places importance on the fuel efficiency.
- Solid lines L001, L002, and L003 shown in FIG. 10 are the same as the solid lines L001, L002, and L003 shown in FIG.
- a braking operation is temporarily generated, and the reduction rate of the vehicle speed V is temporarily increased at the location indicated by the broken line A001 by the braking operation.
- the unit 68 changes the decrease rate of the vehicle speed V to a gentle one, and changes the virtual travel reference pattern indicated by the solid line L001 to a virtual travel pattern that improves the fuel efficiency more than that.
- the virtual travel pattern after the change is indicated by a broken line L011.
- the travel state optimizing unit 68 does not change the vehicle speed V at the brake operation end position in order to obtain the virtual travel pattern indicated by the broken line L011, and more than the brake operation amount BRK indicated by the solid line L003.
- a small brake operation amount BRK is assumed as indicated by a broken line L013.
- the traveling state optimization unit 68 calculates the rate of decrease of the vehicle speed V based on the brake operation amount BRK indicated by the broken line L013 and the operation section W013 from the relationship obtained experimentally in advance, and is indicated by the broken line L011.
- the virtual travel pattern is generated in accordance with the relationship between the vehicle speed V to be detected and the travel direction distance from the vehicle position, that is, the driving tendency of the driver who places importance on the fuel efficiency.
- the driving state optimization unit 68 changes the virtual driving reference pattern generated by the driving pattern generation unit 64 to a virtual driving pattern according to the driving tendency of the driver who places importance on fuel efficiency.
- the example shown in FIG. 10 is an example of the virtual travel pattern change.
- the travel state optimization unit 68 determines that the driving tendency of the driver who places emphasis on power performance is selected
- the virtual travel pattern is changed.
- the relationship between the vehicle speed V in the travel reference pattern and the traveling direction distance from the vehicle position may be shifted to the high vehicle speed side by a predetermined width.
- the relationship between the vehicle speed V in the virtual traveling reference pattern and the traveling direction distance from the own vehicle position is reduced. It may be shifted to the vehicle speed side by a predetermined width.
- the traveling state optimization unit 68 first determines the traveling state of the virtual leading vehicle 14 in the same manner as the driving characteristic extraction unit 66 described above. Find the inter-vehicle distance DSCCx. That is, as shown in FIG.
- the assumed position of the virtual leading vehicle 14 is determined forward from the own vehicle position by the above-mentioned virtual leading vehicle inter-vehicle distance DSCCx. Then, the traveling state optimization unit 68 determines the traveling state of the virtual leading vehicle 14 from the changed virtual traveling pattern based on the assumed position of the virtual leading vehicle 14. For example, in FIG. 10, since the virtual leading vehicle 14 is traveling at the assumed position indicated by the point Px, the vehicle speed V of the virtual leading vehicle 14 is determined according to the virtual traveling pattern indicated by the broken line L011. It becomes the vehicle speed Vpx shown. In this way, the traveling state of the virtual leading vehicle 14 that is traveling at the vehicle speed Vpx at the assumed position indicated by the point Px is determined. In FIG. 10, the broken line L011 is shifted to the lower side of the solid line L001 for easy viewing.
- the traveling state optimization unit 68 determines the provisional traveling state of the virtual leading vehicle 14 determined by the driving characteristic extraction unit 66. Is changed according to the driving tendency of the driver. For example, in this case, if it is determined that the driving tendency of the driver who places importance on power performance is selected, the vehicle speed V in the provisional driving state is changed. A vehicle that is raised by a predetermined width may be determined as the traveling state of the virtual preceding vehicle 14. On the other hand, when it is determined that the driving tendency of the driver who places importance on fuel efficiency is selected, the traveling state optimization unit 68 reduces the vehicle speed V in the provisional traveling state by a predetermined width. Alternatively, the traveling state of the virtual leading vehicle 14 may be determined.
- the traveling state optimization unit 68 determines the traveling state of the virtual leading vehicle 14 as described above, the virtual leading vehicle control unit 60 displays the virtual leading vehicle 14 in the traveling state of the virtual leading vehicle 14.
- the preceding vehicle display unit 62 is sequentially commanded. Then, in accordance with a command from the virtual leading vehicle control unit 60, the virtual leading vehicle display unit 62 displays the image of the virtual leading vehicle 14 that travels in the traveling state of the virtual leading vehicle 14 determined by the display device 38 in front. Display on the glass 40.
- FIG. 11 is a flowchart for explaining the main part of the control operation of the electronic control unit 12, that is, the control operation for determining the traveling state of the virtual leading vehicle 14 and displaying the image of the virtual leading vehicle 14, for example, several It is repeatedly executed with a very short cycle time of about msec to several tens of msec.
- the control operation shown in FIG. 11 is executed alone or in parallel with other control operations.
- FIG. 12 is a diagram showing a subroutine executed in SA3 of FIG.
- step SA1 in FIG. 11 the vehicle travel related information is acquired during vehicle travel.
- positioning related to the vehicle 10 is performed.
- the vehicle travel related information includes the position of the vehicle 10 (own vehicle position), the vehicle speed V, the traveling direction, the posture (for example, the turning radius of the vehicle 10), the accelerator opening Acc, the brake operation amount BRK, and the like. It is the information showing the vehicle state in driving
- SA1 corresponds to the positioning unit 54.
- SA2 corresponding to the map matching unit 56, the map data stored in the map database 50 is used, and the unit road (segment 74) on which the vehicle 10 is currently traveling is acquired in SA1. Identified based on location. In other words, the map matching is performed. After SA2, the process proceeds to SA3.
- SA3 the vehicle travel related information is learned. Specifically, the subroutine shown in FIG. 12 is executed.
- SB1 of FIG. 12 it is determined whether or not the vehicle 10 is on-road.
- SB1 determination of SB1 is affirmed, that is, when the vehicle 10 is on-road, the process proceeds to SB2.
- SB1 is negative, the process proceeds to SB3.
- SB2 the vehicle travel related information acquired in SA1 and the road number of the unit road specified in SA2 are stored in the travel history database 52 and stored as the travel history (driving history) 80 ( (See FIG. 6). After SB2, the process proceeds to SB3. SB1 and SB2 correspond to the travel history generating unit 58.
- SB3 corresponding to the driving characteristic extracting unit 66, the estimated driver driving characteristics as indicated by solid lines Lca, Lcb, and Lcc in FIG. Updated by 10 vehicle speed V and turning radius. After the update, the process proceeds to SA4 in FIG.
- SA4 corresponding to the travel pattern generation unit 64 and the driving characteristic extraction unit 66, it is determined whether or not the vehicle 10 is currently traveling on the road included in the travel history 80, that is, the traveled road. To be judged. If the determination at SA4 is affirmative, that is, if the vehicle 10 is currently traveling on the traveled road, the process proceeds to SA5. On the other hand, when the determination of SA4 is negative, that is, when the vehicle 10 is currently traveling on the untraveled road, the process proceeds to SA6.
- the traveling pattern of the virtual leading vehicle 14 that is a basis for determining the traveling state of the virtual leading vehicle 14, that is, the virtual traveling pattern is stored and accumulated in the traveling history database 52. It is generated based on the travel history 80. After SA5, the process proceeds to SA8.
- the inter-vehicle distance DSCCx for the virtual leading vehicle is obtained from the inter-vehicle distance map Lvds for virtual leading vehicle shown in FIG. It is assumed that the vehicle is traveling forward in the traveling direction by the inter-vehicle distance DSCCx for the preceding vehicle, and the assumed position of the virtual preceding vehicle 14 is determined. Then, the shape of the road at the assumed position of the virtual leading vehicle 14, specifically the curvature radius of the road, is acquired from the map database 50. After SA6, the process proceeds to SA7.
- SA7 corresponding to the driving characteristic extraction unit 66, it is assumed that the virtual leading vehicle 14 travels according to the shape (curvature radius) of the road acquired in SA6, and the provisional traveling state of the virtual leading vehicle 14 is acquired. It is determined based on the shape of the road and the estimated driver driving characteristic shown in FIG. After SA7, the process proceeds to SA8.
- the traveling state of the virtual preceding vehicle 14 is optimized according to the driving tendency of the driver. Specifically, when the virtual travel pattern is generated in SA5 and the process moves to SA8, the virtual travel pattern is changed to one corresponding to the driving tendency of the driver, and then the virtual preceding vehicle 14 driving states are determined. Further, when the provisional traveling state is determined in SA7 and the process moves to SA8, the provisional traveling state is changed to one corresponding to the driving tendency of the driver, and the changed one is virtually The traveling state of the preceding vehicle 14 is determined. After SA8, the process proceeds to SA9.
- a virtual leading vehicle display command is issued so that the virtual leading vehicle 14 is displayed in the traveling state of the virtual leading vehicle 14 determined in SA8.
- the image of the virtual leading vehicle 14 is displayed on the windshield 40 by the display device 38.
- the driving history 80 that the driver has driven the vehicle 10, that is, the traveling history 80 of the vehicle 10 is stored in the traveling history database 52. Then, a travel pattern of the virtual leading vehicle 14 is generated based on the travel history (driving history) 80, and a travel state of the virtual leading vehicle 14 is determined based on the generated travel pattern of the virtual leading vehicle 14. . In short, the traveling state of the virtual leading vehicle 14 is determined based on the traveling history 80. Therefore, since it appears to the driver that the virtual leading vehicle 14 is traveling according to the driving characteristics of the driver or the driving characteristics close thereto, the driver intends to follow the virtual leading vehicle 14 and It is difficult to feel uncomfortable when driving 10.
- the travel history 80 is stored in association with each road number, so that it corresponds to individual road conditions such as poor road prospects or narrow road widths. Thus, the traveling state of the virtual leading vehicle 14 can be determined.
- the driving characteristics of the driver exemplified as solid lines Lca, Lcb, and Lcc in FIG. 9B are based on the vehicle travel related information that is information related to the travel of the vehicle 10. Is estimated. For example, it is estimated based on the vehicle speed V and turning radius of the vehicle 10.
- the provisional traveling state of the virtual leading vehicle 14 is the estimated driving. From the driving characteristics of the user, the vehicle 10 is determined based on the traveling state (for example, the vehicle speed V and the turning radius) and the road information (for example, the curvature radius of the road) of the road on which the virtual preceding vehicle 14 is virtually traveled.
- the provisional traveling state is changed according to the driving tendency of the driver, and the changed state is determined as the traveling state of the virtual preceding vehicle 14.
- the traveling state of the virtual leading vehicle 14 is determined based on the traveling state of the vehicle 10 and the road information of the road on which the virtual leading vehicle 14 is virtually traveled based on the driving characteristics of the driver. Therefore, even when driving the vehicle 10 on the road on which the driver travels for the first time, the driver's own driving characteristics (for example, driving habits) can be reflected in the behavior of the virtual preceding vehicle 14. Therefore, it is possible to appropriately reduce the driving burden on the driver even on the road on which the driver travels for the first time.
- the driving state of the virtual leading vehicle 14 is selected from predetermined options such as a driving tendency that emphasizes fuel efficiency and a driving tendency that emphasizes power performance, for example. It is switched according to the driving tendency. Therefore, since the traveling state of the vehicle 10 traveling so as to follow the virtual leading vehicle 14 approaches the traveling state of the virtual leading vehicle 14 switched according to the driving tendency of the driver, the vehicle 10 driven by the driver. It becomes easy to reflect the driving tendency of the driver in the driving state.
- the relationship between the inter-vehicle distance DSCC between the vehicle 10 and the actual preceding vehicle while the vehicle 10 is traveling and the vehicle speed V of the vehicle 10, that is, the actual inter-vehicle distance vehicle speed related point Pvds ( are sequentially stored.
- the inter-vehicle distance map Lvds for the virtual preceding vehicle is generated as shown by a solid line Lvds in FIG.
- the inter-vehicle distance DSCCx for the virtual leading vehicle between the vehicle 10 and the virtual leading vehicle 14 is determined based on the inter-vehicle distance map Lvds for the virtual leading vehicle.
- the inter-vehicle distance DSCCx for the virtual preceding vehicle is determined based on the relationship between the stored inter-vehicle distance DSCC and the vehicle speed V of the vehicle 10 (actual inter-vehicle distance vehicle speed related point Pvds). Accordingly, since the driving characteristics of the driver are reflected in the inter-vehicle distance DSCCx for the virtual leading vehicle between the vehicle 10 and the virtual leading vehicle 14, for example, the inter-vehicle distance DSCCx for the virtual leading vehicle is the driving characteristic of the driver. Compared with the case where the vehicle is determined independently, the driver can easily drive the vehicle 10 to follow the virtual preceding vehicle 14.
- the image of the virtual leading vehicle 14 is displayed on the windshield 40 of the vehicle 10. Accordingly, since the driver can visually recognize the scenery seen in the vehicle traveling direction and the image of the virtual preceding vehicle 14 in an overlapping manner, the driver of the traveling vehicle 10 can easily view the virtual leading vehicle 14. An image can be displayed.
- the travel pattern of the virtual leading vehicle 14 is based on the travel history 80.
- the traveling state of the virtual leading vehicle 14 is determined based on the traveling pattern of the virtual leading vehicle 14. Therefore, it is possible to display an image of the virtual leading vehicle 14 in which the virtual leading vehicle 14 exhibits a behavior reflecting the driving characteristics of the driver and the driver can easily follow the vehicle 10.
- the vehicle 10 may be driven by any one of the drivers.
- the electronic control unit 12 has a travel history 80 for each driver as shown in FIG. 13 (see FIG. 6). Is stored in the travel history database 52, and the travel state of the virtual preceding vehicle 14 may be determined based on the travel history 80 corresponding to the current driver of the vehicle 10.
- the driver of the vehicle 10 may be identified by a weight sensor that measures the weight of the driver provided in the driver seat, a face recognition sensor that recognizes the driver's face, or the like.
- a weight sensor that measures the weight of the driver provided in the driver seat
- a face recognition sensor that recognizes the driver's face
- the memory switch operation may be identified. Note that FIG. 13 shows an example in which three driving histories 80 of drivers DR1, DR2, and DR3 are stored in the driving history database 52 for each driver.
- the travel history 80 is stored for each driver as shown in FIG. 13, the inter-vehicle distance map Lvds for the virtual preceding vehicle shown in FIG. 7 and the estimated driver driving shown in FIG. 9B. Characteristics are also generated and stored for each driver.
- three estimated driver driving characteristics Lca, Lcb, and Lcc are set in FIG. 9B, but may be one or two, or four or more.
- the estimated driver driving characteristics Lca, Lcb, Lcc represent the relationship between the turning radius of the vehicle 10 and the vehicle speed V, but may be a mutual relationship including other parameters.
- the relationship between the road width and the vehicle speed V, the relationship between the vehicle acceleration and the turning radius, the relationship between the turning radius, the road width, and the vehicle speed V may be used.
- the road width is included in the parameter of the estimated driver driving characteristic, the road information referred to for determining the provisional traveling state of the virtual leading vehicle 14, that is, the virtual leading vehicle 14 is determined.
- the road information of the road to be virtually traveled includes the road width.
- a curvature radius of a road is exemplified as the road information referred to in order to determine the provisional traveling state of the virtual leading vehicle 14, but the road information is included in the curvature radius. It is not limited.
- the vehicle speed V and the turning radius of the vehicle 10 are illustrated as the vehicle travel related information on which the estimated driver driving characteristics are estimated, but this is only an example,
- the estimated driver driving characteristics may be estimated based on other state quantities (for example, yaw rate and acceleration) included in the vehicle travel-related information.
- the estimated driver driving characteristic Lcb is selected based on the point PC1 indicating the turning radius and the vehicle speed V of the vehicle 10 in the example of FIG.
- the estimated driver driving characteristic passing through the point indicating the turning radius and the vehicle speed V is the estimated driver driving characteristic.
- the estimated driver driving characteristics generated by complementing the driving characteristics Lca and Lcb may be used to determine the provisional driving state of the virtual preceding vehicle 14.
- the vehicle speed V is exemplified as a parameter determined as the traveling state of the virtual preceding vehicle 14, but other parameters may be determined. For example, if the road on which the virtual leading vehicle 14 travels is curved, the turning radius of the virtual leading vehicle 14 is determined to be the same value as the curvature radius of the road stored in the map database 50, and the turning radius The virtual leading vehicle 14 is turned.
- the driving tendency of the driver there are two options, the one that emphasizes the power performance and the one that emphasizes the fuel efficiency, but there are other options. There is no problem. Further, there may be only one of the above options, for example, one that places importance on the fuel efficiency.
- the running state optimization unit 68 determines the driving tendency of the driver by turning on or off the sports mode switch.
- the accelerator opening degree Acc is changed to the sports mode switch.
- the driver's driving tendency may be determined based on the time change rate. For example, the traveling state optimization unit 68 determines that the driving tendency of the driver who places importance on the power performance is selected if the time change rate of the accelerator opening Acc is equal to or greater than a predetermined threshold, and the accelerator opening If the time change rate of Acc is less than the predetermined threshold value, it may be determined that the driving tendency of the driver who places importance on the fuel efficiency is selected.
- the traveling state of the virtual leading vehicle 14 is determined based on the traveling pattern (virtual traveling pattern) of the virtual leading vehicle 14 as shown in FIG.
- the traveling state is greatly deviated from the traveling pattern
- the determination of the traveling state of the virtual leading vehicle 14 is stopped, and the image of the virtual leading vehicle 14 may not be displayed.
- This is for failsafe.
- the case where the traveling state of the vehicle 10 at the own vehicle position is greatly deviated from the traveling pattern is, for example, that the vehicle speed V of the vehicle 10 at the own vehicle position is a predetermined width or more with respect to the vehicle speed V obtained from the traveling pattern. This is the case when there is a gap.
- the traveling state of the virtual leading vehicle 14 is determined based on the traveling pattern (virtual traveling pattern) of the virtual leading vehicle 14 as shown in FIG. It is also conceivable that it is determined by other methods without being generated.
- the travel history (driving history) 80 is illustrated in FIG. 6, but the inter-vehicle distance DSCC between the vehicle 10 and the actual preceding vehicle as shown in FIG.
- the traveling state of the virtual leading vehicle 14 is optimized according to the driving tendency of the driver at SA8 in FIG. 11, but it does not matter if it is not so optimized.
- the traveling state of the virtual leading vehicle 14 displayed on the windshield 40 may be determined as it is according to the virtual traveling pattern generated in SA5, or the provisional traveling state determined in SA7. It may be left as it is.
- SA6 and SA7 are provided in the flowchart of FIG. 11. However, if SA6 and SA7 are not present and the determination of SA4 is negative, the traveling state of the virtual preceding vehicle 14 is determined. The image of the virtual leading vehicle 14 may not be displayed without being displayed. If SA6 and SA7 are not provided, SB3 in FIG. 12 is not necessary.
- the inter-vehicle distance DSCCx for the virtual preceding vehicle assumed between the vehicle 10 and the virtual preceding vehicle 14 is determined from the inter-vehicle distance map Lvds for the virtual preceding vehicle shown in FIG.
- a predetermined distance may be used instead of being determined from the inter-vehicle distance map Lvds for the virtual preceding vehicle, or even if the vehicle 10 travels at the current vehicle speed V within a predetermined time. Good.
- the inter-vehicle distance map Lvds for the virtual preceding vehicle is not necessary.
- the image of the virtual leading vehicle 14 is displayed on the windshield 40, but the display location of the image of the virtual leading vehicle 14 is not limited to the windshield 40.
- the driver is wearing glasses, and an image of the virtual leading vehicle 14 may be displayed on a part of the glasses.
- the road information such as the road length and the radius of curvature is stored in the map database 50.
- the road information is acquired from the map database 50, but may be acquired by other methods. Absent. For example, when the travel history 80 is accumulated and the road information of the road on which the vehicle 10 is traveling is detected by a sensor or the like and accumulated in advance, when the vehicle 10 is traveling on the traveled road, It is possible to acquire the road information while the vehicle 10 is traveling.
- the traveling pattern of the virtual leading vehicle 14 shown in FIGS. 8 and 10 shows changes in the vehicle speed V, the accelerator opening Acc, and the brake operation amount BRK.
- the road gradient, the time zone during which the road travels, the on / off state of the air conditioner, and the like may be added.
- Vehicle 12 Electronic control device (vehicle driving support device) 14: Virtual preceding vehicle 40: Windshield 80: Travel history (driving history)
- DSCC Distance between vehicles DSCCx: Inter-vehicle distance for virtual leading vehicles
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Abstract
Description
12:電子制御装置(車両用運転支援装置)
14:仮想先行車
40:フロントガラス
80:走行履歴(運転履歴)
DSCC:車間距離
DSCCx:仮想先行車用車間距離
Claims (5)
- 走行中の車両の前方に走行しているように仮想された仮想先行車が該車両の運転者に視認されるように該仮想先行車の画像を表示する車両用運転支援装置であって、
前記運転者が前記車両を運転した運転履歴を記憶し、
該運転履歴に基づいて前記仮想先行車の走行状態を決定する
ことを特徴とする車両用運転支援装置。 - 前記車両が前記運転履歴に含まれていない道路を走行している場合には、前記車両の走行に関連する情報に基づき推定された前記運転者の運転特性から、前記仮想先行車を仮想的に走行させる道路の道路情報に基づいて該仮想先行車の走行状態を決定する
ことを特徴とする請求項1に記載の車両用運転支援装置。 - 所定の選択肢から択一的に選択される前記運転者の運転傾向に応じて、前記仮想先行車の走行状態を切り替える
ことを特徴とする請求項1又は2に記載の車両用運転支援装置。 - 前記車両の走行中における該車両と実際の先行車両との間の車間距離と、該車両の車速との関係を記憶し、
該記憶された車間距離と車速との関係に基づいて、前記車両と前記仮想先行車との間の車間距離を決定する
ことを特徴とする請求項1から3の何れか1項に記載の車両用運転支援装置。 - 前記車両のフロントガラスに前記仮想先行車の画像を表示する
ことを特徴とする請求項1から4の何れか1項に記載の車両用運転支援装置。
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PCT/JP2011/065302 WO2013005293A1 (ja) | 2011-07-04 | 2011-07-04 | 車両用運転支援装置 |
CN201180072016.8A CN103635370A (zh) | 2011-07-04 | 2011-07-04 | 车辆用驾驶辅助装置 |
US14/130,753 US20140159886A1 (en) | 2011-07-04 | 2011-07-04 | Driving assist device for vehicle |
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