JP5744818B2 - Vehicle driving support device - Google Patents

Description

  The present invention relates to a vehicle driving support apparatus that receives signal information of the traffic signal from outside (external) at an upstream point of an intersection where a traffic signal is installed, and passes the intersection using the received signal information.

  Conventionally, when a vehicle passes an intersection where a traffic signal is installed, at the upstream point of the intersection, the current lamp color of the traffic signal, the lighting time of each lamp color, and the remaining until the next lamp color changes. Receive signal information including the number of seconds (remaining time, waiting time), etc. from outside the vehicle, calculate the arrival time of the own vehicle to the intersection from the received signal information and the position / vehicle speed of the own vehicle, until the intersection A vehicle driving support device has been proposed for notifying the driver (driver) to start deceleration when the arrival time is longer than the time until the light color of the traffic light changes from blue to yellow or red. ([0032]-[0035] of Patent Document 1).

JP 2010-244308 A

  In the above-mentioned Patent Document 1, when the vehicle driving support device determines that it is difficult to pass a traffic light during a green signal (lights in blue), the vehicle driving support device is advanced by notifying the driver of the start of deceleration of the vehicle. It is disclosed that the fuel consumption can be improved and the fuel consumption can be improved (Patent Document 1 [0008]).

  However, the inventors of this application notify the driver of the start of deceleration of the vehicle when it is determined that it is difficult for the vehicle driving support device according to the above-described prior art to pass a traffic light during a green signal. Until that time, that is, until the driver prompts the driver to start deceleration, the driver performs normal driving operation, so unnecessary acceleration (acceleration more than necessary) may occur, and fuel consumption (fuel consumption) is reduced. I found inconvenience that it might get worse.

  The present invention has been made in consideration of such a problem. When it is inevitable to stop according to a traffic light at the next intersection (nearest intersection), the driver performs an unnecessary acceleration operation. An object of the present invention is to provide a vehicle driving support apparatus that can suppress fuel consumption and prevent deterioration of fuel consumption.

  The present invention relates to a vehicle driving support device mounted on a vehicle, a receiving unit that receives signal information including a transition of a light color of a traffic light installed at an intersection and a lighting time of each of the light colors from outside the vehicle; Based on the remaining distance calculation unit that calculates the remaining distance indicating the distance from the vehicle position to the intersection, the acceleration calculation unit that calculates the acceleration of the host vehicle, the signal information and the remaining distance, A passability determining unit that determines whether or not the vehicle can pass in a non-stop manner according to the light color of the traffic light, and a stop distance that indicates a distance required to stop by deceleration when the passability determination unit determines that the vehicle cannot pass A stop distance calculating unit that calculates the remaining distance, the distance comparing unit that compares the remaining distance and the stopping distance, and the distance comparing unit that determines that the remaining distance ≦ the stopping distance is satisfied. When it is determined by the deceleration recommendation unit that recommends a deceleration operation and the distance comparison unit that the remaining distance> the stop distance, the acceleration is equal to or greater than a predetermined acceleration when the remaining distance is equal to or less than a specified distance. An acceleration suppression recommendation unit that recommends an acceleration suppression operation to the driver when any one of the conditions is satisfied, and when the remaining distance is equal to or less than a specified distance and the acceleration is equal to or greater than a predetermined acceleration. It is characterized by providing.

According to the present invention, when it is determined that the vehicle cannot pass through the intersection in a non-stop manner according to the color of the traffic light (passage is impossible), the stop required for the vehicle to stop at the intersection due to deceleration. When the distance is calculated and the calculated remaining distance is longer than the stop distance to the intersection, first, when the remaining distance is equal to or less than a specified distance, second, the acceleration of the host vehicle is equal to or greater than a predetermined acceleration And third, when the remaining distance is less than a specified distance and the acceleration is greater than or equal to a predetermined acceleration, an acceleration suppression operation is recommended to the driver. Therefore, it is possible to prevent the driver from performing unnecessary acceleration operations and prevent deterioration of fuel consumption. The fuel consumption includes the fuel consumption of the engine vehicle, the power consumption of the battery of the electric vehicle, the fuel / power consumption of the hybrid vehicle, the fuel / power consumption of the fuel cell vehicle, and the like.

  In this case, the deceleration at the time of calculating the stop distance indicating the distance required for the stop by the deceleration includes the deceleration by the accelerator off so that the engine brake and / or the regenerative brake (motor) by the accelerator off operation is performed. The brake due to the regenerative operation is utilized to prevent deterioration of fuel consumption.

  It is also included in the present invention that the deceleration is only the foot brake or only the accelerator off.

  According to the present invention, at the next intersection, when it is determined that it is inevitable to stop according to the traffic light, and it is determined that it is still early to decelerate by performing the deceleration operation, the driver performs unnecessary acceleration operation. Therefore, it is possible to prevent the deterioration of fuel consumption (including power consumption).

  Thus, by supporting the acceleration suppression operation of the vehicle, the merchantability of the vehicle driving support device according to the present invention can be improved.

1 is a schematic configuration diagram of a vehicle driving support system in which infrastructure related to a road on which a vehicle on which a vehicle driving support device according to this embodiment is mounted is maintained. It is a block diagram which shows the structure of the driving assistance device for vehicles which concerns on this embodiment mounted in the vehicle. It is a flowchart with which operation | movement description of the driving assistance device for vehicles which concerns on this embodiment is provided. It is explanatory drawing which shows the example of the signal information obtained by road-to-vehicle communication. It is explanatory drawing with which it uses for the calculation example of the passage speed range within a green signal. FIG. 6 is an explanatory diagram provided for a calculation example of a passing speed range in a green signal when the speed limit is different from the example in FIG. 5. It is explanatory drawing which shows the example of a driving assistance display at the time of passing a traffic signal with a green light. It is explanatory drawing provided for the example of stop distance calculation by deceleration operation including an accelerator-off operation. It is explanatory drawing of the example of a display of acceleration suppression recommendation. It is explanatory drawing of the example of a display of an accelerator off recommendation.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a vehicle driving support system 16 in which infrastructure relating to a road 14 on which a vehicle (also referred to as a host vehicle) 12 on which a vehicle driving support device 10 according to this embodiment is mounted is provided. ing.

  The vehicle driving support system 16 includes a signal controller 22 that controls a traffic light 20 installed at an intersection B (also referred to as a point B) on the road 14 and an upstream point A (a distance Xa [m] away from the intersection B). An optical beacon transmission / reception controller 26 that controls the optical beacon transceiver 24 installed on the roadside of the installation point A, the optical beacon reception point A, the reception point A, or simply the point A), and the signal controller 22 An information relay determination device 28 connected to the optical beacon transmission / reception controller 26 is provided.

  In this embodiment, the traffic light 20 is such that the vehicle 12 stops at a blue light 21b (including a green light and the like) through which the vehicle 12 can pass through the intersection B and a stop position (stop line) C at the intersection B. Alternatively, when the vehicle cannot be stopped safely at the stop position C, the yellow light 21y (including amber light, orange light, etc.) that prompts passage is prohibited and the vehicle 12 is prohibited from traveling downstream from the stop position C at the intersection B. A red lamp 21r.

  The traffic light 20 in which the blue light 21b is lit is referred to as a blue signal, the traffic light 20 in which the yellow light 21y is lit is referred to as a yellow signal, and the traffic light 20 in which the red light 21r is lit is referred to as a red signal.

  The signal controller 22 manages and controls the transition of the lamp color of the traffic signal 20 and the remaining number of seconds of each lamp color based on the signal information 70 (see FIG. 4 described later) determined at that time. To drive.

  Note that the remaining number of seconds for each lamp color is equal to the scheduled number of seconds (the number of remaining seconds before starting lighting) when not lighting, and once lighting starts, the number of seconds decreases from the scheduled number of times, and lighting ends. Then, the value becomes zero, and when the lighting is started again, a value that decreases every moment from the predetermined number of seconds is taken.

  In this embodiment, the lighting of the lamp color includes the first lamp color (current lamp color), the second lamp color (next lamp color), the third lamp color (next lamp color), and the first lamp color. , The second light color, the third light color,... Also, in this embodiment, when each lamp color starts lighting, the remaining number of seconds decreases from the scheduled number of seconds (timed down), and when the remaining number of seconds becomes zero, the next lamp color is lit. ing.

  The signal information 70 is updated at an extremely short time compared to the scheduled number of seconds in order to measure the exact number of remaining seconds.

  The information relay determination device 28 receives the signal information 70 from the signal controller 22 and sends the signal information 70 to the optical beacon transmission / reception controller 26.

  The optical beacon transmitter / receiver 24 is driven by the optical beacon transmitter / receiver controller 26, and the driven optical beacon transmitter / receiver 24 is in response to the vehicle 12 passing (running) at the point A that is the upstream point of the intersection B. The signal information 70 is transmitted by the optical signal L.

  FIG. 2 shows the configuration of the vehicle driving support apparatus 10 according to this embodiment mounted on the vehicle 12.

  The vehicle driving assistance device 10 includes a driving assistance ECU 50 (Electronic Control Unit), and an optical beacon transceiver 52, a navigation device 54, a vehicle speed sensor 56, and the like are connected to the driving assistance ECU 50. Then, the driving support ECU 50 processes signals from these connection devices and outputs the processing results to the display unit 60 such as a color display and the sound output unit 59 such as a speaker.

  The driving support ECU 50 is a computer including a microcomputer, and includes a CPU (Central Processing Unit), a ROM (including EEPROM) as a memory, a RAM (Random Access Memory), an A / D converter, and a D / A conversion. Input / output device such as a timer, a timer as a timer, etc., and the CPU reads and executes a program recorded in the ROM so that various function realizing units (function realizing means) such as a control unit and a calculation unit And function as a processing unit or the like.

  Specifically, in this embodiment, as shown in FIG. 2, the driving assistance ECU 50 includes a remaining distance calculation unit 61, an acceleration calculation unit 62, a passing speed range calculation unit 63, a passability determination unit 64, and a stop distance calculation unit 65. , A distance comparison unit 66, a deceleration recommendation unit 67, an acceleration suppression recommendation unit 68, and a display control unit 69 that controls the sound output from the sound output unit 59 and the display output on the display unit 60.

  Next, the operation of the vehicle driving support apparatus 10 basically configured as described above will be described in detail based on the flowchart shown in FIG. The execution subject of the program according to the flowchart is the driving support ECU 50.

  In step S1, when the vehicle 12 traveling on the road 14 passes through the installation point A of the optical beacon transmitter / receiver 24, the downstream side of the road 14 from the optical beacon transmitter / receiver 24, which is an external roadside device, at the point A. The signal information 70 of the traffic light 20 installed at the point B is received as an optical signal L by the optical beacon transceiver 52 of the vehicle 12 (step S1: YES), and is output to the driving support ECU 50 through the optical beacon transceiver 52, The driving support ECU 50 acquires (acquires signal information).

  In addition, the determination of step S1 is repeated negative determination (step S1: NO) until road-to-vehicle communication reception becomes affirmative (step S1: YES).

  FIG. 4 shows an example of information obtained by road-to-vehicle communication in step S1, and shows a configuration example of signal information 70 that is input to the driving support ECU 50 and temporarily stored in a memory (not shown). The signal information 70 includes signal color transition {first lamp color (currently lit lamp color: also referred to as current lamp color), second lamp color (the next scheduled lamp color: The next lamp color), the third lamp color (the next lamp color to be lit: also called the next lamp color)}, each lamp color (color), the first, second and second The remaining number of seconds for each of the three lamp colors is included.

  In this embodiment, the signal information 70 includes the distance Xa from the upstream point A to the stop position C of the intersection B where the traffic light 20 is installed as road information. The distance Xa may be calculated by the driving assistance ECU 50 obtaining current location information and map information from the navigation device 54.

  Further, the legal maximum speed (hereinafter referred to as a speed limit) Vlimit of the road 14 is acquired as the signal information 70. The speed limit Vlimit can also be obtained from the navigation device 54 or the like.

  Note that the remaining number of seconds of the first lamp color, which is the current lamp color, is usually less than the scheduled number of seconds. That is, since the first lamp color starts to be turned on before the vehicle 12 passes through the point A, and only when the first lamp color starts to turn on when the vehicle 12 passes through the point A, This is because the remaining number of seconds = scheduled number of seconds.

  Next, when the signal information 70 is acquired and at every very short predetermined time (processing cycle), in step S2, the remaining distance calculation unit 61 determines the elapsed time from the reception point A of the signal information 70 and the reception point A. Is calculated, and the remaining number of seconds for each lamp color and the remaining distance X to the stop position C (remaining distance: X = Xa−traveling distance) are updated.

  Here, the travel distance can be calculated by multiplying the speed (vehicle speed, vehicle speed) v of the vehicle 12 acquired from the vehicle speed sensor 56 with the elapsed time. The travel distance may be calculated using the navigation device 54.

  Next, in step S3, the passing speed range calculation unit 63, based on the current position and the current time, during the scheduled time (scheduled number of seconds) during which the blue light 21b of the next (most recent) traffic light 20 is lit. In other words, a speed range (passing speed range, passable speed range) Vrange that can pass through the next intersection B with a green light is calculated. A speed range that can pass through the next intersection B with a blue signal and within the speed limit Vlimit is referred to as a passing speed range (passable speed range) Vrange.

For example, as shown in FIG. 5, the passing speed range Vrange is calculated. In this case, the time from the current time (0) at the current position (0) of the traveling vehicle 12 to the end of the current red signal is defined as T1 (number of remaining seconds), and the next green signal ends from the current time. Time (time until the start of the next yellow signal) is T2 {T1 + (scheduled number of green signals)}. Then, the upper limit speed V1 indicated by the solid line in the passing speed range Vrange is calculated by the following equation (1) obtained by dividing the remaining distance X to the stop position C (intersection position) of the intersection B by the time T1, Similarly, it is understood that the lower limit speed V2 indicated by the solid line is calculated by the following equation (2) obtained by dividing the remaining distance X of the intersection B to the stop position C (intersection position) by the time T2.
V1 = X / T1 (1)
V2 = X / T2 (2)

  In FIG. 5, the speed limit Vlimit is indicated by a broken line. Time T3 indicates the time when the next yellow signal ends (the time when the next red signal starts).

  Next, in step S4, the pass / fail judgment unit 64 compares the lower limit speed V2 in the passing speed range Vrange with the speed limit Vlimit of the road 14 that is running, and the lower speed V2 is equal to or lower than the speed limit Vlimit. It is determined whether or not.

  When the lower limit speed V2 is a speed equal to or lower than the limit speed Vlimit (step S4: YES), the passability determination unit 64 determines that the traffic light 20 at the intersection B can pass under a green light (passage is possible). As shown in FIG. 5, when the upper limit speed V1 is also equal to or lower than the limit speed Vlimit (V1 ≦ Vlimit), the passing speed range Vrange that can pass through the next intersection B with a blue signal and within the limit speed Vlimit is It is determined that the intersection B is equal to the passing speed range Vrange that can pass through the green light (Vrange = Vrange).

  As shown in FIG. 6, when the speed limit Vlimit exists between the upper limit speed V1 and the lower limit speed V2, the speed range between the lower limit speed V2 and the limit speed Vlimit becomes the passing speed range Vrange.

  Next, in step S5, for example, as shown in FIG. 7 of the display corresponding to the example in FIG. 5, the display control unit 69 can pass through the intersection B in a non-stop manner according to the light color (blue light 21b) of the traffic light 20. A passing speed range VRb corresponding to the speed range Vrange is displayed.

  In FIG. 7, a speedometer 76 having an arc-shaped speed scale 72 and a pointer 74 (indicator) is displayed on the display unit 60, and a red signal is displayed around the arc-shaped speedometer 76 in association with the speedometer 76. The upper limit speed V1 for passing through the intersection B (stop position C) is set as the maximum speed at the timing when the green signal starts and the green signal starts, and passes through the intersection B (stop position C) at the timing when the green signal ends and the yellow signal starts. Therefore, the passing speed range VRb having the minimum speed V2 as the minimum speed is displayed in a blue color.

  In the display of the example of FIG. 7, the pointer 74 of the speedometer 76 indicating the current vehicle speed V indicates a speed exceeding the passing speed range VRb, so that the driver makes the pointer 74 fall within the blue passing speed range VRb. When the accelerator opening is reduced and the pointer 74 is made lower than the upper limit speed V1, the intersection B where the traffic light 20 is installed can be passed with a so-called green signal. In this case, it may be notified that the possibility of passing through the traffic light 20 is high by reducing the current speed v so as to fall within the passing speed range VRb by sound through the sound output unit 59.

  In FIG. 7, although not shown, the arc speed range in the red signal period is displayed on the upper right side following the arc shape of the pass speed range VRb displayed in blue, and the pass speed displayed in blue. The arc-shaped speed range in the yellow signal period may be displayed in red and yellow in the lower left side following the arc of the range VRb.

  In FIG. 7, a so-called multi-information display 80 capable of displaying fuel consumption and the like on the central display portion of the display portion 60 has a speed limit Vlimit (actually, for example, 60 [km / h]). The display 80a is displayed.

  On the other hand, if it is determined in step S4 that the passable lower limit speed V2 is higher than the limit speed Vlimit (step S4: NO), the passability determination unit 64 passes the traffic light 20 at the intersection B under a green light. Is determined to be impossible (passable).

  In this case, the stop distance calculation unit 65 calculates a stop distance Xstop required for stop by deceleration, which can be safely stopped at the stop position C of the intersection B, in step S6.

  FIG. 8 shows a travel simulation model (travel model) 82 (deceleration characteristics) for calculating a stop distance Xstop due to deceleration.

In this running simulation model 82, the driver reaction time is α [sec], the deceleration due to the accelerator off (idle state where the accelerator pedal is returned to the original position by the return spring) is a [m / sec ² ], and the deceleration by the foot brake. The speed is b [m / sec ² ] (| a | <| b |), the current speed is v [m / sec], and the deceleration target speed at which the footbrake operation is started is v ′ [m / sec].

Therefore, when the driver is recommended to decelerate by turning off the accelerator at the current position (0) traveling at the current speed v, as will be described later, the stop distance Xstop is a reaction delay based on the reaction time α of the driver. The braking distance (v ′ ² −v ² ) / 2a based on the constant acceleration linear motion by the deceleration a when the accelerator is off and the constant acceleration linear motion by the deceleration b by the foot brake. It is calculated by the following equation (3) as the sum of the braking distance (−v ′ ² ) / 2b based.
Xstop = vα + {(v ′ ² −v ² ) / 2a} + {(− v ′ ² ) / 2b}
= Vα + [{(b−a) v ′ ² −bv ² } / 2ab] (3)

  As is well known, the deceleration a by the accelerator off and the deceleration b by the foot brake vary depending on the vehicle environmental conditions such as the road surface condition, the tire condition, and the load amount of the load. Predetermined values corresponding to the states are preferably used, and those states may be detected, and suitable predetermined values may be selected from characteristics, maps, and the like stored in a storage unit (memory) or the like.

  In the travel simulation model 82, the current speed v may be a limit speed Vlimit of 60 [km / h] which is the maximum speed on a general road. In this case, the travel simulation model 82 is the stop distance Xstop required to stop by decelerating from the speed limit Vlimit by the accelerator off.

  Next, in step S7, the distance comparison unit 66 determines that the remaining distance X from the current position calculated in step S2 to the stop position C of the intersection B where the traffic signal 20 is installed is the stop distance Xstop calculated in step S6. It is determined whether it is shorter (X ≦ Xstop).

When the remaining distance X to the stop position C is longer than the stop distance Xstop (step S7: NO), in step S8, the acceleration suppression recommendation unit 68 uses the following two expressions (4) and (5). It is determined whether or not it is necessary to recommend acceleration suppression depending on whether or not the equations are satisfied simultaneously.
X ≦ Xr (4) and ad ≧ ar (5)

  That is, the remaining distance X to the stop position C is shorter than the sufficiently long specified distance Xr (Xr> Xstop) so that the remaining distance X is not related to any driving behavior (driving operation) of the driver, and the current acceleration ad is, for example, When the acceleration is larger than the specified acceleration ar that is a value of 75 [%] of about 0.1 G (step S8: YES), the acceleration suppression recommendation unit 68 suppresses the acceleration with respect to the driver in step S9. Acceleration suppression recommended processing that prompts

  In this case, in the acceleration suppression recommendation process, as shown in FIG. 9, a display 80 b of “Please refrain from acceleration” (acceleration suppression instruction) is displayed on the multi-information display 80 of the display unit 60. At the same time, the sound output unit 59 may output a voice prompting to suppress acceleration such as “please refrain from acceleration”.

  If it is determined in step S8 that the remaining distance X to the stop position C is longer than the specified distance Xr that is sufficiently long to be irrelevant to any driving behavior (driving operation) of the driver, or the current acceleration ad is normally accelerated. If any one of the conditions in which the acceleration is less than the predetermined acceleration ar, which is a value of 75 [%] of about 0.1 G (step S8: NO), the processing after step S2 is repeated, If the process of S2 → Step S3 → Step S4: NO → Step S6 → Step S7: YES is established, in Step S10, the deceleration recommendation unit 67 prompts the driver to perform an accelerator off operation. I do.

  In this case, in the accelerator-off recommendation process, as shown in FIG. 10, a display 80b of “Acceleration OFF recommendation (Acceleration OFF recommendation)” is displayed on the multi-information display 80 of the display unit 60. At the same time, the sound output unit 59 may output a voice prompting that the accelerator is turned off, such as “Recommend accelerator off”.

  In the above-described embodiment, when the distance comparison unit 66 determines that the remaining distance X is longer than the stop distance Xstop necessary for stopping by deceleration (X> Xstop: step S7: NO), the remaining distance X Is the specified distance Xr or less and the current acceleration ad is the predetermined acceleration ar or more (step S8: YES), the acceleration suppression recommendation unit 68 recommends an acceleration suppression operation to the driver (step S9). Not limited to this, when the distance comparison unit 66 determines that the remaining distance X is longer than the stopping distance Xstop required for stopping by deceleration (X> Xstop: step S7: NO), the remaining distance X is the specified distance Xr. When the following is satisfied (X ≦ Xr) or when the acceleration ad is equal to or greater than the predetermined acceleration ar (ad ≧ ar), the driver performs an acceleration suppression operation. It is also possible to recommend.

[Summary of Embodiment]
As described above, the vehicle driving support apparatus 10 according to this embodiment mounted on the vehicle 12 is a signal including the transition of the light color of the traffic light 20 installed at the intersection B and the lighting time of each of the light colors. An optical beacon transmitter / receiver 52 as a receiving unit that receives the information 70 from the optical beacon transmitter / receiver 24 outside the vehicle, a remaining distance calculating unit 61 that calculates a remaining distance X indicating the distance from the position of the host vehicle 12 to the intersection B, Based on the acceleration calculation unit 62 that calculates the acceleration ad of the host vehicle 12, and based on the signal information 70 and the remaining distance X, it is determined whether or not the intersection B can be passed non-stop according to the color of the traffic light 20. When it is determined that the passage is impossible by the passage determination unit 64 and the passage determination unit 64 (step S4: NO), a stop for calculating a stop distance Xstop indicating a distance required for the stop by deceleration The distance calculation unit 65, the distance comparison unit 66 that compares the remaining distance X and the stop distance Xstop, and the distance comparison unit 66 determine that the remaining distance ≦ the stop distance (X ≦ Xstop) is satisfied. When (step S7: YES), the driver recommends a deceleration operation (step S10). The deceleration recommendation unit 67 and the distance comparison unit 66 determine that the remaining distance> the stop distance (X> Xstop) is satisfied. The remaining distance X is equal to or less than the specified distance Xr (X ≦ Xr), the acceleration ad is equal to or greater than the predetermined acceleration ar (ad ≧ ar), and the remaining distance X is equal to or less than the specified distance Xr ( When X ≦ Xr) and the acceleration ad is equal to or greater than a predetermined acceleration ar (ad ≧ ar), an acceleration suppression that recommends an acceleration suppression operation to the driver is satisfied. It includes a recommending unit 68, a.

According to this embodiment, when it is determined that the vehicle 12 cannot pass through the intersection B in a non-stop manner according to the color of the traffic light 20 (passage is impossible), the vehicle 12 stops at the intersection B due to deceleration. When the required remaining distance X is calculated and the calculated remaining distance X is longer than the stopping distance Xstop to the intersection B (step S7: NO), first, when the remaining distance X is equal to or less than the specified distance Xr Second, when the acceleration ad of the host vehicle 12 is equal to or greater than the predetermined acceleration ar, and thirdly, when the remaining distance X is equal to or less than the specified distance Xr and the acceleration ad is equal to or greater than the predetermined acceleration ar. When the condition is satisfied, the driver is recommended to perform an acceleration suppression operation (step S9), so that the driver is prevented from performing an unnecessary acceleration operation to prevent fuel consumption from deteriorating. Door can be.

  In this case, the deceleration at the time of calculating the stop distance Xstop required for the stop by the deceleration includes the deceleration by the accelerator off, so that the engine brake and / or the regenerative brake (motor regeneration by the accelerator off operation) is performed. Deterioration of fuel consumption can be prevented by using braking by operation.

  It is also included in the present invention that the deceleration is only the foot brake or only the accelerator off.

  According to this embodiment, at the next intersection B, it is unavoidable to stop according to the traffic light 20, that is, it is determined that a stop by a red signal is unavoidable, but the vehicle is decelerated by performing a deceleration operation such as an accelerator off operation. Therefore, when it is determined that it is still too early, the driver is prevented from performing unnecessary acceleration operation, so that an effect of preventing deterioration of fuel consumption and power consumption can be achieved. In other words, if the remaining traffic light 20 cannot pass through the next traffic light 20 and the remaining distance X to the intersection B is short, the vehicle will decelerate with a red signal even if it accelerates. Providing information to receive. In this case, acceleration suppression may be urged only when the acceleration ad is greater than or equal to the predetermined acceleration ar.

  Note that when the remaining distance X to the intersection B is sufficient, acceleration suppression may not be performed.

  Thus, by supporting the acceleration suppression operation of the vehicle 12, as a result, the merchantability of the vehicle driving support device 10 according to this embodiment can be improved.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted based on the contents described in this specification.

DESCRIPTION OF SYMBOLS 10 ... Vehicle driving assistance device 12 ... Vehicle 20 ... Traffic light 24, 52 ... Optical beacon transceiver 50 ... Driving assistance ECU 60 ... Display part 61 ... Remaining distance calculation part 62 ... Acceleration calculation part 63 ... Passing speed range calculation part 64 ... Passability determination unit 65 ... stop distance calculation unit 66 ... distance comparison unit 67 ... deceleration recommendation unit 68 ... acceleration suppression recommendation unit 70 ... signal information 80 ... multi-information display A ... upstream point (light beacon reception point)
B ... Intersection

Claims (2)

In a vehicle driving support device mounted on a vehicle,
A receiver that receives signal information including the transition of the light color of the traffic light installed at the intersection and the lighting time of each of the light colors from outside the vehicle;
A remaining distance calculating unit that calculates a remaining distance indicating a distance from the position of the host vehicle to the intersection;
An acceleration calculation unit for calculating the acceleration of the host vehicle;
Based on the signal information and the remaining distance, a passability determination unit that determines whether the intersection can be passed nonstop according to the color of the traffic light;
When it is determined that the passage is impossible by the passage permission / inhibition determination unit, a stop distance calculation unit that calculates a stop distance indicating a distance required for stop by deceleration;
A distance comparison unit that compares the remaining distance and the stop distance;
When it is determined by the distance comparison unit that the remaining distance ≦ the stop distance, a deceleration recommendation unit that recommends a deceleration operation to the driver;
When the distance comparison unit determines that the remaining distance> the stop distance, the remaining distance is equal to or less than a specified distance, or the remaining distance is equal to or less than a specified distance and the acceleration is a predetermined acceleration. When any of the above conditions is satisfied, an acceleration suppression recommendation unit that recommends an acceleration suppression operation to the driver;
A vehicle driving support apparatus comprising: The vehicle driving support device according to claim 1,
The stop distance indicating the distance required for stop by deceleration includes a free running distance based on a driver reaction delay time, a braking distance during a deceleration period due to accelerator off , and a braking distance due to a deceleration period due to a foot brake. Driving support device.

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