JP2016064834A - Travel control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve more comfortable drive feeling that reflects the speed limit of a road during traveling and the intention of a driver.SOLUTION: A travel control method, using a switch capable of accelerating input of a set speed of a vehicle and decelerating input of the set speed, comprises: an acquisition step of acquiring the speed limit of a road on which the vehicle travels; a notification step of notifying information relating to the speed limit; and an update step of, when the set speed is higher than the speed limit, not updating the set speed to the speed limit if the accelerating input is made within a predetermined time from start of the notification, and updating the same if the decelerating input is made within the predetermined time.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a travel related to a travel control device including a vehicle speed limiting device that limits a vehicle speed, that is, a vehicle speed to an arbitrary upper limit set by a driver, and a vehicle speed maintenance device that maintains a vehicle speed at a set speed set by the driver. It relates to a control method.

  Conventionally, the vehicle speed limiting device as described above is also referred to as an adjustable speed limiter (ASL). By using this device, the vehicle speed can be limited at an arbitrary vehicle speed set by the driver. This vehicle speed limit prevents the driver from unintentionally performing an acceleration operation exceeding the limit vehicle speed, and has the advantage that the driver can limit the vehicle speed to the upper limit value without intending the limit vehicle speed. doing.

  The vehicle speed maintenance device is also called (Adaptive Cruse Control: ACC), and is described in Patent Document 1 below, which obtains the speed limit of the road that is running, It is disclosed that when there is an input, the set speed is set as the speed limit.

JP 2011-000935 A

  However, in such a vehicle speed maintenance device, regardless of the magnitude relationship between the set speed and the speed limit, the set speed is increased or decreased based on the input of the manual switch. There arises a problem that a more comfortable driving feeling reflecting the driver's intention cannot be realized.

  In view of the above problems, an object of the present invention is to realize a more comfortable driving feeling that reflects the speed limit of a road that is running and the driver's intention.

In order to solve the above problem, the travel control device according to the present invention provides:
A switch that is provided at a position where the driver of the vehicle can operate, and is capable of selecting whether to set or cancel the speed limit control based on the driver's operation. A switch capable of performing a deceleration input of the set speed of the vehicle by a coast operation;
Obtaining means for obtaining a speed limit of a road on which the vehicle travels;
Notification means for notifying information related to the speed limit;
When the set speed is faster than the speed limit and the speed increase input is performed within a predetermined time from the start of the notification, the set speed is not updated to the speed limit and the update is not performed within the predetermined time. Update means for performing the update when the deceleration input is performed,
The update means performs the update when the set speed is equal to or less than the speed limit and the speed increase input is performed within the predetermined time, and the speed reduction input is performed within the predetermined time. In some cases, the update is not performed.

  Here, when the difference between the speed limit and the set speed is less than a predetermined speed, the update means does not perform the notification, and the set speed is faster than the speed limit and within the predetermined time. When the speed increase input is performed, the notification unit may stop the notification. In addition, when the set speed is equal to or less than the speed limit and the deceleration input is performed within the predetermined time, the notification unit may stop the notification.

  The travel control method of the present invention is a travel control method using a switch capable of performing a speed increase input of a set speed of a vehicle and a speed decrease input of the set speed, and is a restriction on a road on which the vehicle travels. An acquisition step of acquiring a speed and a notification step of notifying information related to the speed limit, wherein the set speed is within a predetermined time from the start of the notification when the set speed of the vehicle is faster than the speed limit When the speed increase input is performed, the update is not performed with the set speed as the speed limit, and the update is performed when the speed decrease input is performed within the predetermined time. To do. The program of the present invention is a program for executing the travel control method, and the medium of the present invention is a medium storing the program.

  According to the present invention, based on the magnitude relationship between the set speed and the speed limit, the update is adopted when the deceleration input is performed without the update when the acceleration input is performed when the former is large, and the driving is performed. It is possible to realize control that reflects the speed limit while reflecting the intention of the person.

1 is a block diagram showing an embodiment of a vehicle speed limiting device 1 (travel control device) of Example 1 according to the present invention. FIG. 3 is a schematic diagram showing an outline of control contents of the vehicle speed limiting device 1 according to the first embodiment (upper limit speed = updating or non-updating based on a magnitude relationship between a set speed and a limiting speed and a switch operation). 3 is a flowchart showing the control contents of the vehicle speed limiting device 1 according to the first embodiment. It is a schematic diagram which shows one form of the control result containing the update in the vehicle speed limiting apparatus 1 of Example 1. FIG. It is a schematic diagram which shows the map used for control of the vehicle speed limiting apparatus 21 of Example 2. FIG. 6 is a flowchart used for control of a vehicle speed limiting device 21 according to a second embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the vehicle speed limiting device 1 of the present embodiment includes a switch 2, an upper limit speed determination unit 3, a speed control unit 4, a display 5, a sign recognition camera 6 (or navigation device), The speed limit determination unit 7 and the speed limit reflection processing unit 8 are included.

  The switch 2 is provided at a position that can be operated by the driver in the vehicle, and can set or cancel the speed limit control based on the driver's operation. It is possible to input by decelerating the upper limit speed by a coast operation.

  The upper limit speed determination unit 3, the speed control unit 4, the speed limit determination unit 7, and the speed limit reflection processing unit 8 are each configured as a control block by an ASL module (Adjustable Speed Limiter), for example. The ASL module is composed of, for example, a CPU, ROM, RAM, a data bus connecting them, and an input / output interface, and the CPU performs predetermined processing according to a program stored in the ROM.

  The ASL module is connected to an engine ECU (Engine Electronic Control Unit) and a brake ECU (not shown). The ASL module, the engine ECU, and the brake ECU are connected to each other by a communication standard such as CAN (Controller Area Network).

  The upper limit speed determination unit 3 determines the upper limit speed after the increase by adding the increment based on the acceleration input by the operation of the switch 2 to the upper limit speed before the increase, or the upper limit speed before the decrease based on the deceleration input The upper limit speed after reduction is determined by subtracting from. Further, the upper limit speed determination unit 3 displays the upper limit speed to the driver by the display 5.

  The speed control unit 4 limits the vehicle speed below the upper limit speed determined as shown below. Here, the engine ECU is composed of, for example, a CPU, a ROM, a RAM, a data bus connecting them, and an input / output interface, and the CPU performs a predetermined process according to a program stored in the ROM.

  Here, a brake ECU (not shown) includes, for example, a CPU, a ROM, a RAM, a data bus for connecting them, and an input / output interface, and the CPU performs predetermined processing according to a program stored in the ROM. The vehicle speed is detected from the speed sensor, and the detection result is output to the ASL module via the CAN.

  The ASL module calculates the target acceleration based on the vehicle speed difference from the vehicle speed difference between the upper limit speed set by the accelerator or coasting operation and the set speed and the current vehicle speed (vehicle speed) during the control after the driver sets the switch 2. . The ASL module converts the target acceleration into an ASL required opening based on a predetermined formula including a value obtained by multiplying the difference between the target acceleration and the vehicle speed by a gain.

  The engine ECU controls the throttle opening of the engine (not shown) after the opening adjustment block performs adjustment based on both the command of the ASL required opening from the ASL module and the stepping opening from the accelerator pedal, Controls vehicle acceleration / deceleration.

  The sign recognition camera 6 is a camera equipped with an image sensor such as a CCD or a CMOS, images the surroundings of the host vehicle at a predetermined angle of view including a sign on the roadside, and detects a speed limit from the sign in the captured image. Then, the detection result is output to the speed limit determination unit 7. The speed limit determination unit 7 determines the speed limit from the received output result and passes the determination result to the speed limit reflection processing unit 8.

  The speed limit reflection processing unit 8 gives an update guide of the upper limit speed to the driver through the display 5 for a predetermined time after receiving the output result, and when the driver operates the switch 2 within the predetermined time. 2, whether to reflect the received speed limit to the upper speed limit is determined based on the matrix shown in FIG. 2, that is, the magnitude relationship and the operation of the switch 2. Update speed limit as upper speed limit.

  That is, as shown in the upper part of FIG. 2, when the upper limit speed is higher than the limit speed, the upper limit speed decreases after the update. If it is in the speed increasing direction, it rejects that the speed limit is set to the upper limit speed, and if it is in the coasting direction, that is, in the deceleration direction, it is adopted. In other words, when the upper limit speed set by the switch 2 is in the deceleration direction, the upper limit speed is reduced and the speed limit is set.

  As shown in the lower part of FIG. 2, when the speed limit is faster than the upper limit speed, the upper limit speed increases after the update, and therefore the speed limit reflection processing unit 8 performs coasting on the switch 2. If there is, the use of the speed limit as the upper speed limit is rejected. In other words, when the upper limit speed set by the switch 2 is in the speed increasing direction, the upper limit speed is increased to be the speed limit.

  Hereinafter, the control content of the vehicle speed limiting device 1 of the first embodiment will be described with reference to the flowchart shown in FIG. In step S1, the speed limit reflection processing unit 8 determines whether or not the driver has selected ASL by operating the switch 2 and is in speed limit control. If the result is affirmative, the process proceeds to step S2. If so, the process proceeds to step S13.

  In step S2, the speed limit reflection processing unit 8 determines whether or not the information about the speed limit is input to the speed limit determination unit 7 from the sign recognition camera 6. If the result is affirmative, the process proceeds to step S3. Proceed to S12.

  In step S3, the speed limit reflection processing unit 8 (notification means) uses the display 5, for example, “Do you want to use the road speed limit as the upper speed limit? The current upper speed limit is faster than the speed limit. Please select coast 2 ”or“ Do you want the speed limit of the road to be the upper speed limit? The current upper speed limit is slower than the speed limit, so if you agree, select the accelerator for switch 2. ”etc. The driver is informed of the update of the maximum speed by text display and voice display.

  Subsequently, in step S4, the speed limit reflection processing unit 8 has passed a predetermined time Tg (for example, 10 seconds), which is the update guide execution time after the end of the determination in step S2, that is, the update guide start time. If the result is affirmative, the process proceeds to step S5. If the result is negative, the process returns to the position before step S3.

  In step S5, the speed limit reflection processing unit 8 (update means) determines whether or not the upper limit speed is faster than the speed limit, and proceeds to step S6 if affirmative and proceeds to step S10 if negative.

  In step S6, the speed limit reflection processing unit 8 determines whether or not there is a switch operation in the speed increasing direction (during the period in which step S3 is executed). If the result is affirmative, the process proceeds to step S7. If there is, the process proceeds to step S8.

  In step S <b> 7, the speed limit reflection processing unit 8 cancels the update guidance for the upper limit speed. In step S8, the speed limit reflection processing unit 8 determines whether or not there has been a switch operation in the deceleration direction. If the result is affirmative, the process proceeds to step S9, the upper limit speed setting is updated, that is, the speed limit is reflected, and the result is negative. If there is, the process proceeds to step S12, and the upper limit speed setting is not updated.

  In step S10, the speed limit reflection processing unit 8 determines whether or not there has been a switch operation in the speed increasing direction. If the result is affirmative, the process proceeds to step S9, the upper limit speed setting is updated, that is, the speed limit is reflected, and negative If so, the process proceeds to step S11, and the upper limit speed setting is not updated.

  In step S13, the speed limit reflection processing unit 8 (notification unit) determines whether or not a speed limit is input. If the result is affirmative, the process proceeds to step S14, and if not, the process proceeds to step S16. In step S <b> 14, the speed limit reflection processing unit 8 uses the display 5 to guide the speed limit to the driver by text display or voice display such as “New speed limit input”, for example, As shown in step S15, step S14 is continued until the elapsed time passes a predetermined time Tg. In step S16, the speed limit reflection processing unit 8 does not guide the speed limit.

  The program of the present invention is executed according to the above control contents. For example, when the upper limit speed is higher than the speed limit, as shown in FIG. 4, the update in the deceleration direction of FIG. If there is a switch operation input that satisfies the condition, the speed limit is automatically reduced to the upper limit speed.

  That is, according to the vehicle speed limiting device 1 of the present embodiment realized by the control contents described above, the following operational effects can be obtained. In other words, when a newly input speed limit (for example, legal speed) of a running road is adopted, if the upper limit speed is increased when it is adopted, the driver will approve it by operating the accelerator, leading to a decrease. Can be approved by the driver by operating the coast. In other words, the driver can be updated in accordance with the driver's feeling, and the driver's operation is simple and timely, so that a more comfortable driving feeling can be realized. In addition, the accelerator and coast operations can be performed even during a predetermined time during which update guidance is performed.

  In addition to the first embodiment described above, when the difference between the speed limit and the upper limit speed is small, the update guidance may not be performed. The second embodiment will be described below.

  In the vehicle speed limiting device 1 of the second embodiment, the absolute value of the difference between the upper limit speed and the speed limit is calculated, and if the difference is equal to or greater than the dead zone ΔVth (for example, 10 km / h), update guidance is performed. If it is less than ΔVth, update guidance is not performed. That is, step S22 is added to the flowchart shown in FIG. 3, as shown in FIG. According to the second embodiment, the update guidance is performed only when the speed difference is equal to or greater than a certain value, and the driver's troublesomeness can be eliminated.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions are made to the above-described embodiments without departing from the scope of the present invention. be able to. For example, in the above-described embodiments, the vehicle speed limiting device is shown as the travel control device, but the present invention can be similarly applied to the vehicle speed maintaining device.

  The present invention relates to a travel control device such as a vehicle speed limiting device or a vehicle speed maintaining device, and can provide driving reflecting the limited vehicle speed of a road on which the vehicle travels while realizing a more comfortable driving feeling. It is useful when applied to various vehicles such as passenger cars, trucks and buses.

1 Vehicle speed limiter (travel control device)
2 switches (acceleration input means, deceleration input means)
3 Upper limit speed determination unit 4 Speed control unit 5 Display 6 Sign recognition camera (or navigation device)
7 Speed limit judgment part 8 Speed limit reflection processing part (notification means, update means)

Claims (5)

A travel control method using a switch capable of performing a speed increase input of a set speed of a vehicle and a speed reduction input of the set speed,
An acquisition step of acquiring a speed limit of a road on which the vehicle travels;
A notification step for notifying information related to the speed limit,
When the set speed of the vehicle is faster than the speed limit and the speed increase input of the set speed is performed within a predetermined time from the start of the notification, the set speed is not updated to the speed limit. The travel control method according to claim 1, wherein the update is performed when a deceleration input of the set speed is performed within the predetermined time.   When the set speed is equal to or lower than the speed limit, the update is performed when the acceleration input is performed within the predetermined time, and the update is performed when the deceleration input is performed within the predetermined time. The travel control method according to claim 1, wherein the control is not performed.   The travel control method according to claim 1, wherein the notification is not performed when a difference between the speed limit and the set speed is less than a predetermined speed.   The notification is stopped when the set speed is higher than the speed limit and the speed increase input is performed within the predetermined time. The travel control method described.   The notification is stopped when the set speed is equal to or lower than the speed limit and the deceleration input is performed within the predetermined time. The travel control method described.

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