WO2018047291A1 - 車両の走行制御方法および走行制御装置 - Google Patents
車両の走行制御方法および走行制御装置 Download PDFInfo
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- WO2018047291A1 WO2018047291A1 PCT/JP2016/076599 JP2016076599W WO2018047291A1 WO 2018047291 A1 WO2018047291 A1 WO 2018047291A1 JP 2016076599 W JP2016076599 W JP 2016076599W WO 2018047291 A1 WO2018047291 A1 WO 2018047291A1
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- 230000006870 function Effects 0.000 description 88
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- 238000002474 experimental method Methods 0.000 description 3
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Definitions
- the present invention relates to a traveling control method and a traveling control device for controlling traveling of a vehicle.
- Patent Document 1 There is known a potential risk level warning device that issues a warning according to the possibility that the host vehicle and the other vehicle approach each other when the host vehicle and another vehicle traveling in the adjacent lane run in parallel on a curve.
- a problem to be solved by the present invention is a travel control method and a travel method for appropriately controlling the travel of the host vehicle so as to dispel the driver's anxiety when the host vehicle travels on a curve or narrow road in the automatic travel control. It is to provide a control device.
- the present invention provides a case where a road section including at least one of a curve and a narrow road exists in front of the host vehicle and the other vehicle is driving in an adjacent lane of the host vehicle's driving lane during automatic driving control of the host vehicle
- the above problem is solved by setting the inter-vehicle distance at which the host vehicle and the other vehicle do not run side by side.
- the present invention it is possible to prevent the host vehicle and another vehicle from running side by side when the host vehicle travels on a curve or a narrow road, and thus it is possible to eliminate the driver's anxiety that occurs during automatic travel control. .
- FIG. 1 is a block diagram showing a configuration of a travel control apparatus 100 according to the present embodiment.
- the travel control device 100 includes a host vehicle position detection device 110, a map database 120, a vehicle speed sensor 130, a distance measurement sensor 140, a camera 150, and an input device 160. And a drive mechanism 170 and a control device 180. These devices are connected by a CAN (Controller Area Network) or other vehicle-mounted LAN in order to exchange information with each other.
- CAN Controller Area Network
- the own vehicle position detection device 110 includes a GPS unit, detects radio waves transmitted from a plurality of satellite communications, periodically acquires the position information of the own vehicle, and acquires the acquired position information of the own vehicle; Based on the angle change information acquired from the gyro sensor and the vehicle speed acquired from the vehicle speed sensor 130, the current position of the host vehicle is detected.
- the own vehicle position detection device 110 can also detect the position of the own vehicle using a well-known map matching technique.
- the map database 120 stores map information.
- the map information stored in the map database 120 includes attribute information regarding the curvature radius R of the road, the road width W, the road shoulder structure, and the meeting point at each map coordinate.
- the vehicle speed sensor 130 measures the rotational speed of a drive system such as a drive shaft, and detects the traveling speed of the host vehicle (hereinafter also referred to as vehicle speed) based on this. Vehicle speed information of the host vehicle detected by the vehicle speed sensor 130 is output to the control device 180.
- the ranging sensor 140 detects an obstacle existing around the host vehicle.
- the distance measuring sensor 140 also calculates a relative distance and a relative speed between the host vehicle and the obstacle. Information on the obstacle detected by the distance measuring sensor 140 is transmitted to the control device 180.
- a distance measuring sensor 140 a laser radar, a millimeter wave radar, or the like can be used.
- the camera 150 images roads and obstacles around the vehicle. Image information captured by the camera 150 is transmitted to the control device 180.
- the input device 160 is an operation member that can be operated by a driver.
- the driver can set on / off of the automatic traveling control of the vehicle by operating the input device 160.
- the automatic traveling control of the vehicle when there is a preceding vehicle in front of the own vehicle, the distance between the own vehicle and the preceding vehicle is maintained at the inter-vehicle distance set by the driver.
- the inter-vehicle distance control for traveling the vehicle is performed, and when there is no preceding vehicle ahead of the host vehicle, the speed control is performed for driving the host vehicle at the vehicle speed set by the driver.
- the driver operates the input device 160 to set the set vehicle speed (for example, a specific speed value) of the host vehicle in the speed control and the set inter-vehicle distance in the inter-vehicle distance control (for example, short, medium, 3 levels) can be set.
- the set vehicle speed for example, a specific speed value
- the set inter-vehicle distance in the inter-vehicle distance control for example, short, medium, 3 levels
- the drive mechanism 170 includes an engine and / or a motor (power system), a brake (braking system), a steering actuator (steering system), and the like for automatically driving the host vehicle.
- the operation of the drive mechanism 170 is controlled by the control device 180 when automatic traveling control described later is performed.
- the control device 180 includes a ROM (Read Only Memory) that stores a program for controlling the traveling of the host vehicle, a CPU (Central Processing Unit) that executes the program stored in the ROM, and an accessible storage device. It consists of a functioning RAM (Random Access Memory).
- ROM Read Only Memory
- CPU Central Processing Unit
- RAM Random Access Memory
- As an operation circuit instead of or in addition to a CPU (Central Processing Unit), an MPU (Micro Processing Unit), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), etc. Can be used.
- the control device 180 executes a program stored in the ROM by the CPU, thereby acquiring own vehicle information acquisition function for acquiring own vehicle information relating to the running state of the own vehicle, and surrounding information relating to obstacles existing around the own vehicle.
- a road shape determination function for determining the road shape of the road ahead of the host vehicle, a passing determination function for determining whether the host vehicle passes the front adjacent vehicle in front of the curve, and an inter-vehicle distance from the preceding vehicle
- An inter-vehicle distance setting function to be set and a travel control function to control the travel of the host vehicle are realized. Below, each function with which the control apparatus 180 is provided is demonstrated. “Overtaking” means that another vehicle traveling in another lane travels from the rear to the front of the
- the control device 180 acquires host vehicle information related to the traveling state of the host vehicle using the host vehicle information acquisition function.
- the control device 180 can acquire the position information of the own vehicle from the own vehicle position detection device 110 and the vehicle speed information of the own vehicle from the vehicle speed sensor 130 as the own vehicle information by the own vehicle information acquisition function.
- the control device 180 acquires the surrounding information about the obstacle around the host vehicle by the surrounding information acquisition function. For example, the control device 180 uses the surrounding information acquisition function to determine whether or not there is a surrounding vehicle traveling around the host vehicle from the distance measuring sensor 140, and when there is a surrounding vehicle around the host vehicle, Information on the relative distance and relative speed between the host vehicle and the surrounding vehicle can be acquired as the surrounding information. Further, the control device 180 calculates the absolute vehicle speed of the surrounding vehicle based on the vehicle speed of the own vehicle acquired by the own vehicle information acquisition function and the relative speed between the own vehicle and the surrounding vehicle by the surrounding information acquisition function, The calculated absolute vehicle speed of the surrounding vehicle can also be acquired as the surrounding information.
- the control device 180 specifies whether the other vehicle existing ahead of the host vehicle is a front adjacent vehicle or a preceding vehicle based on the surrounding information acquired by the surrounding information acquisition function by the surrounding vehicle specifying function. For example, the control device 180 acquires a captured image in front of the host vehicle from the camera 150 by the surrounding vehicle specifying function, and detects a lane mark in front of the host vehicle. Then, the control device 180 uses the surrounding vehicle detection function, and based on the position information of the surrounding vehicle included in the surrounding information and the lane mark of the road ahead of the own vehicle, the surrounding vehicle traveling in front of the own vehicle Identify the lane in which the vehicle travels.
- the surrounding vehicle when a surrounding vehicle traveling in front of the host vehicle is traveling in an adjacent lane adjacent to the own lane, the surrounding vehicle can be specified as the front adjacent vehicle by the surrounding vehicle specifying function. . Further, when the surrounding vehicle traveling in front of the host vehicle is traveling in the own lane, the surrounding vehicle can be identified as the preceding vehicle by the surrounding vehicle specifying function.
- the control device 180 determines whether the road ahead of the host vehicle is a curve by the road shape determination function. The details of the road shape determination method by the road shape determination function will be described later.
- the control device 180 determines whether or not the own vehicle can pass the front adjacent vehicle before the curve (position closer to the own vehicle than the start point of the curve) by the overtaking determination function. The details of the overtaking determination method using the overtaking determination function will be described later.
- the control device 180 sets the inter-vehicle distance between the host vehicle and the adjacent vehicle ahead or the preceding vehicle based on the determination result of the overtaking determination function by the inter-vehicle distance setting function. The details of the method for setting the inter-vehicle distance by the inter-vehicle distance setting function will also be described later.
- the control device 180 controls the drive mechanism 170 by the travel control function, thereby executing automatic travel control that automatically performs all or part of the travel of the host vehicle.
- the traveling control function in the present embodiment automatically controls the operation of the drive mechanism 170 such as an engine and a brake when a preceding vehicle is present in front of the own vehicle, so that the own vehicle and the preceding vehicle or the own vehicle are controlled.
- the distance between the vehicle and the adjacent vehicle in front is maintained at the distance between vehicles set by the distance between vehicles setting function, and the distance between vehicles is controlled.
- the traveling control function in the present embodiment when there is no preceding vehicle ahead of the host vehicle, automatically controls the operation of the drive mechanism 170 such as the engine and the brake, thereby setting a predetermined vehicle speed set by the driver.
- the speed control for running the host vehicle is executed.
- FIG. 2 is a flowchart showing the travel control process according to the present embodiment. Note that the travel control process described below is executed by the control device 180. The travel control process described below starts when the ignition switch or power switch is turned on, and is repeatedly executed at a predetermined cycle (for example, every 10 milliseconds) until the ignition switch or power switch is turned off. Is done.
- a predetermined cycle for example, every 10 milliseconds
- an example of a case where automatic driving control is input (ON) by a driver will be described. That is, the driver sets the automatic travel control to ON via the input device 160, and when the preceding vehicle exists ahead of the host vehicle, the driver sets the distance between the host vehicle and the preceding vehicle.
- the inter-vehicle distance control is performed to automatically drive the host vehicle while maintaining the inter-vehicle distance, and when there is no preceding vehicle ahead of the host vehicle, the speed control to automatically drive the host vehicle at the set vehicle speed set by the driver is performed.
- An example of a scene to be performed will be described.
- the vehicle information regarding the running state of the vehicle is acquired by the vehicle information acquisition function of the control device 180.
- the own vehicle information acquisition function can acquire the position information of the own vehicle from the own vehicle position detection device 110 and the vehicle speed information of the own vehicle from the vehicle speed sensor 130 as the own vehicle information.
- the surrounding information on the obstacle around the host vehicle is obtained by the surrounding information obtaining function of the control device 180.
- the surrounding information acquisition function is the presence / absence of a surrounding vehicle traveling around the host vehicle, and if there is a surrounding vehicle around the host vehicle, the relative position of the surrounding vehicle, the relative position of the host vehicle and the surrounding vehicle Information on distance, relative speed, and absolute vehicle speed of surrounding vehicles can be acquired as surrounding information.
- the front adjacent vehicle and the preceding vehicle are specified by the surrounding vehicle specifying function.
- the surrounding vehicle specifying function acquires a captured image in front of the host vehicle from the camera 150 and detects a lane mark in front of the host vehicle. Based on the surrounding vehicle position information acquired in step S102 and the information on the lane mark in front of the host vehicle, whether the surrounding vehicle is traveling in the host lane is determined by the surrounding vehicle specifying function. By determining whether the vehicle is traveling in the adjacent lane adjacent to the vehicle, the surrounding vehicle traveling ahead of the host vehicle is specified as the preceding vehicle traveling in the host lane or the forward adjacent vehicle traveling in the adjacent lane.
- step S104 it is determined by the overtaking determination function whether there is a front adjacent vehicle based on the result of step S103. If there is no vehicle adjacent to the front, the process proceeds to step S117. On the other hand, if there is a front adjacent vehicle, the process proceeds to step S105.
- step S105 a road shape determination process for determining whether the road ahead of the host vehicle is a curve is performed by the road shape determination function.
- FIG. 3 is a flowchart showing a subroutine of the road shape determination process in step S105. In the following, the road shape determination process will be described with reference to FIG.
- step S201 the curvature radius R of the road ahead of the host vehicle is acquired by the road shape determination function.
- the road shape determination function can acquire the curvature radius R of the road ahead of the host vehicle by referring to the map database 120. it can.
- step S202 the road shape determination function calculates the fluctuation amount A of the lateral position of the front adjacent vehicle over a certain period based on the surrounding information acquired in step S102.
- the traveling control process shown in FIG. 2 is repeatedly performed, and the information on the lateral position (position in the vehicle width direction) of the front adjacent vehicle among the surrounding information acquired in step S102 is controlled as time-series data. It is stored in the RAM of the device 180.
- the road shape determination function can calculate the variation amount A of the lateral position of the front adjacent vehicle in the certain period based on the time series data of the lateral position of the front adjacent vehicle in the most recent certain period.
- step S203 the curvature radius threshold value Rth is set based on the variation amount A of the lateral position of the front adjacent vehicle calculated in step S202 by the road shape determination function.
- FIG. 4 is a graph (control map) showing an example of the relationship between the variation amount A of the lateral position of the adjacent vehicle ahead and the curvature radius threshold value Rth .
- the road shape determination function sets the curvature radius threshold value Rth as R2 when the fluctuation amount A of the lateral position of the adjacent vehicle ahead is less than A1.
- the road shape determination function when the lateral position variation A of the front adjacent vehicle V2 is not less than A1 and less than A2, the curvature radius threshold R th in proportion to the lateral position variation A of the front adjacent vehicle.
- the curvature radius threshold value Rth is set so that becomes larger in the range from R2 to R1.
- the road shape determination function sets the curvature radius threshold value Rth to R1 when the variation amount A of the lateral position of the adjacent vehicle ahead is A2 or more.
- A1, A2, R1, and R2 are not particularly limited, and can be set as appropriate through experiments.
- the curvature radius threshold value R th is set based on the variation amount A of the lateral position of the adjacent vehicle ahead.
- the curvature radius of the road ahead of the host vehicle obtained by referring to the map database 120 is set.
- R is a value on the map database 120 to the last, and in this embodiment, the degree of wobbling in the left-right direction when the vehicle actually travels is added to this.
- the curvature radius threshold value Rth is set to be larger as the lateral displacement amount A (the degree of wobbling on the left and right) of the front adjacent vehicle is larger. Therefore, even if the curvature radius R is the same, the lateral position variation amount of the front adjacent vehicle The greater A (the degree of left / right wobbling), the higher the frequency with which a curve is determined.
- step S204 the road shape determining function, the radius of curvature R of the road ahead of the vehicle acquired in step S201, determines whether the curvature radius smaller than the threshold R th set in step S203 is performed. It determined that when the radius of curvature R of the road ahead of the vehicle is less than the radius of curvature threshold R th, the process proceeds to step S205, in step S205, the road shape determining function, the road ahead of the vehicle is curve To do. On the other hand, if the radius of curvature R of the road ahead of the vehicle is the radius of curvature threshold R th or more, the process proceeds to step S206, in step S206, the road shape determining function, the road ahead of the vehicle is not a curve Is determined.
- step S205 after determining that the road ahead of the host vehicle is a curve, the process proceeds to step S207, where the road shape determination function determines the curve arrival point of the curve ahead of the host vehicle from the current position of the host vehicle. The distance to the starting point of the curve when viewed from the host vehicle is calculated.
- step S106 the road shape determination process shown in FIG. 3
- step S106 in FIG. 2 the overtaking determination function determines whether the road ahead of the host vehicle is a curve based on the determination result of the road shape determination process in step S105.
- the process proceeds to step S107, while the road ahead of the host vehicle is not a curve. If it is determined (step S206), the process proceeds to step S117.
- step S107 When it is determined that the road ahead of the host vehicle is a curve, in step S107, the position information and vehicle speed information of the front adjacent vehicle specified in step S103 and the host vehicle acquired in step S101 are detected by the overtaking determination function. Based on the position information and the vehicle speed information, when the host vehicle and the front adjacent vehicle travel at the current vehicle speed, the overtaking completion position is predicted such that the host vehicle passes the front adjacent vehicle.
- step S108 it is determined whether or not there is a preceding vehicle ahead of the host vehicle by the overtaking determination function. If it is determined that there is no preceding vehicle, the process proceeds to step S109. If it is determined that there is a preceding vehicle, the process proceeds to step S113.
- step S109 it is determined by the overtaking determination function whether or not the own vehicle can pass the front adjacent vehicle in front of the front curve at the current traveling speed of the own vehicle.
- the overtaking determination function is such that the overtaking completion position PT predicted in step S107 is in front of the vehicle arrival point (curve start point) PC in front of the host vehicle V1 (host vehicle V1). It is determined whether it is in a position close to).
- the overtaking completion position PT is a point where the host vehicle V1 has overtaken the front adjacent vehicle V2 and at least the rear end portion of the host vehicle V1 is located ahead of the front end portion of the front adjacent vehicle V2.
- the overtaking completion position PT is before the curve arrival point PC ahead of the host vehicle V1, it is determined that the host vehicle V1 passes the front adjacent vehicle V2 before the curve ahead. Note that if the overtaking completion position PT cannot be estimated because the vehicle speed of the host vehicle V1 is slower than the vehicle speed of the front adjacent vehicle V2, it is determined that the host vehicle V1 does not pass the front adjacent vehicle V2 before the curve ahead. Also good.
- step S110 speed control is performed by the travel control function to cause the host vehicle to travel at a set vehicle speed set by the driver. Thereafter, the traveling control process shown in FIG. 2 returns to step S101.
- step S111 the inter-vehicle distance between the host vehicle and the adjacent vehicle ahead is set to a predetermined distance D1 by the inter-vehicle distance setting function. Then, in step S112, inter-vehicle distance control for causing the host vehicle to travel is performed by setting the inter-vehicle distance between the host vehicle and the front adjacent vehicle as the inter-vehicle distance D1 set in step S111.
- the travel control function causes the host vehicle to travel away from the adjacent vehicle ahead by a distance D1 between the vehicles in the traveling direction of the host vehicle.
- D1 is not particularly limited, and can be set as appropriate through experiments or the like.
- This inter-vehicle distance D1 is an inter-vehicle distance at which the host vehicle and the front adjacent vehicle (other vehicle) do not run in parallel.
- the front end of the host vehicle is positioned behind the rear end of the front adjacent vehicle while the front adjacent vehicle (other vehicle) is traveling forward. This means that when the host vehicle is traveling forward, the front end portion of the front adjacent vehicle is located behind the rear end portion of the host vehicle.
- the inter-vehicle distance D1 between the host vehicle and the adjacent vehicle ahead does not need to be a constant distance, and may vary within a range of D1 ⁇ 0.
- the inter-vehicle distance D1 with the front adjacent vehicle may be shorter than the inter-vehicle distance D2 or D3 with the preceding vehicle described later, or may be longer than the inter-vehicle distance D2 or D3 with the preceding vehicle.
- FIG. 5 is a plan view illustrating a scene in which the host vehicle V1 travels a curve when there is no preceding vehicle.
- FIG. 6 illustrates a travel control method for the host vehicle V1 in the scene illustrated in FIG. FIG.
- the current position of the host vehicle V1 is P1
- the current position of the front adjacent vehicle V2 traveling in the adjacent lane is P2.
- the host vehicle V1 passes the front adjacent vehicle V2, and the overtaking is completed.
- the position PT is predicted (step S107).
- step S108 No
- step S109 No
- the overtaking completion position PT is behind the curve arrival point PC (a position far from the own vehicle), so it is determined that the vehicle does not pass the adjacent vehicle V2 in front of the curve in front of the own vehicle V1.
- the inter-vehicle distance (the distance between the front end portion of the own vehicle V1 and the rear end portion of the front adjacent vehicle V2) between the own vehicle V1 and the front adjacent vehicle V2 traveling on the curve is set to D1.
- inter-vehicle distance control is performed to cause the host vehicle V1 to travel away from the front adjacent vehicle V2 by the inter-vehicle distance D1 (step S112).
- the host vehicle V1 travels along a curve with a distance D1 between the front adjacent vehicle V2 and the host vehicle V1 travels in parallel with the front adjacent vehicle V2 while traveling along the curve. You can avoid that.
- FIG. 7 is a plan view illustrating another scene in which the host vehicle V1 travels a curve when there is no preceding vehicle ahead of the traveling lane of the host vehicle V1, and FIG. It is a top view for demonstrating the traveling control method of the own vehicle V1 in the scene shown in FIG.
- the current vehicle speed of the host vehicle V1 the current vehicle speed of the front adjacent vehicle V2, the relative distance between the host vehicle V1 and the front adjacent vehicle V2, etc.
- the overtaking completion position PT where the host vehicle V1 overtakes the front adjacent vehicle V2 is predicted (step S107). Further, in the example of the scene shown in FIG.
- step S108 No
- the vehicle can pass the front adjacent vehicle V2 before the curve ahead of the host vehicle V1.
- step S109 A determination of whether or not is made.
- the overtaking completion position PT is in front of the curve arrival point PC (position close to the own vehicle V1)
- step S110 speed control is performed for causing the host vehicle V1 to travel at a set vehicle speed set by the driver (step S110).
- the host vehicle V1 by performing speed control for causing the host vehicle V1 to travel at a set vehicle speed set by the driver, the host vehicle V1 is overtaking the front adjacent vehicle V2 in front of the curve, and is traveling on the curve.
- the vehicle V1 can travel along a curve without running parallel to the front adjacent vehicle V2.
- step S117 the control device 180 determines whether or not there is a preceding vehicle. If it is determined that there is no preceding vehicle, the process proceeds to step S110, and the driver sets the host vehicle V1. The speed control for running at the set vehicle speed is performed. Thus, for example, in the scene example shown in FIG.
- step S113 the overtaking determination function determines whether or not the own vehicle can overtake the adjacent vehicle ahead in front of the curve while the inter-vehicle distance between the own vehicle and the preceding vehicle is set to the preset inter-vehicle distance D2. Done.
- inter-vehicle distance control is performed in which the host vehicle travels away from the preceding vehicle by a set inter-vehicle distance D2 set by the user, and the current vehicle speed of the host vehicle is The vehicle speed is set when the vehicle follows the preceding vehicle with the set inter-vehicle distance D2.
- the overtaking determination function is based on the current vehicle speed of the host vehicle, the vehicle speed of the front adjacent vehicle, and the relative distance between the host vehicle and the front adjacent vehicle.
- the overtaking completion position PT is predicted while maintaining the distance D2.
- the overtaking determination function determines whether or not the predicted overtaking position PT is in front of the curve arrival point PC, thereby maintaining the inter-vehicle distance from the preceding vehicle at the preset inter-vehicle distance D2. A determination is made as to whether or not the vehicle has passed the adjacent vehicle ahead of the curve.
- the process proceeds to step S114.
- the inter-vehicle distance setting function Thus, the set inter-vehicle distance of the host vehicle is maintained as D2.
- the process proceeds to step S115.
- step S115 when the inter-vehicle distance between the preceding vehicle and the host vehicle is changed to D3 shorter than the set inter-vehicle distance D2 set by the user by the overtaking determination function, the host vehicle follows the front adjacent vehicle before the curve. A determination is made whether to exit.
- the overtaking determination function is such that the vehicle speed of the host vehicle when the host vehicle follows the preceding vehicle at the inter-vehicle distance D3 ( ⁇ D2), the vehicle speed of the front adjacent vehicle, and the relative distance between the host vehicle and the front adjacent vehicle. Based on the above, the overtaking completion position PT when the inter-vehicle distance between the host vehicle and the preceding vehicle is the inter-vehicle distance D3 is predicted.
- the overtaking determination function determines whether the predicted overtaking completion position PT is in front of the curve arrival point PC, so that the own vehicle is in front of the curve with the inter-vehicle distance D3 as the inter-vehicle distance D3. A determination is made as to whether or not the vehicle will pass the adjacent vehicle ahead.
- the process proceeds to step S116.
- the inter-vehicle distance setting function The inter-vehicle distance between the vehicle and the preceding vehicle is changed to D3.
- step S112 inter-vehicle distance control is performed for causing the host vehicle to travel with the inter-vehicle distance from the preceding vehicle as D3.
- the process proceeds to step S111, and the distance between the front vehicle and the adjacent vehicle is set to D1. Is done.
- step S112 inter-vehicle distance control for driving the host vehicle is performed with the inter-vehicle distance from the front adjacent vehicle as D1.
- FIG. 9 is a plan view illustrating another scene in which the host vehicle V1 travels a curve when the preceding vehicle V3 exists
- FIG. 10 illustrates the travel of the host vehicle V1 in the scene illustrated in FIG. It is a top view for demonstrating a control method.
- the current position of the host vehicle V1 is P1
- the current position of the front adjacent vehicle V2 is P2
- the current position of the preceding vehicle V3 is P3.
- the inter-vehicle distance control is performed so that the host vehicle V1 travels away from the preceding vehicle V3 by a set inter-vehicle distance D2 preset by the driver.
- the host vehicle V1 determines the front adjacent vehicle V2 based on the current vehicle speed of the host vehicle V1, the current vehicle speed of the front adjacent vehicle V2, the relative position between the host vehicle V1 and the front adjacent vehicle V2, and the like.
- the overtaking completion position PT to be overtaken is predicted (step S107).
- the overtaking completion position PT is the overtaking completion position PT when the host vehicle V1 is driven while the host vehicle V1 is running with the inter-vehicle distance from the preceding vehicle V3 as D2. In the example of the scene shown in FIG.
- step S108 Yes
- a determination is made as to whether or not the vehicle will pass the front adjacent vehicle V2 in front (step S113).
- the inter-vehicle distance with the preceding vehicle V3 is maintained as the set inter-vehicle distance D2 (step S114), and the inter-vehicle distance control is performed such that the host vehicle V1 travels away from the preceding vehicle V3 by the set inter-vehicle distance D2 (step S112). .
- the host vehicle V1 by performing inter-vehicle distance control that causes the host vehicle V1 to travel away from the preceding vehicle V3 by the set inter-vehicle distance D2, the host vehicle V1 overtakes the front adjacent vehicle V2 before the curve, While traveling along a curve, the host vehicle V1 can travel along the curve without running in parallel with the front adjacent vehicle V2.
- FIG. 11 is a plan view illustrating another scene in which the host vehicle V1 travels a curve when the preceding vehicle V3 is present
- FIG. 12 illustrates a traveling control method for the host vehicle in the scene illustrated in FIG. FIG.
- the inter-vehicle distance control is performed so that the host vehicle V1 travels away from the preceding vehicle V3 by the preset inter-vehicle distance D2 that is set in advance, similarly to the example of the scene shown in FIG. Yes.
- the inter-vehicle distance control is performed so that the host vehicle V1 travels away from the preceding vehicle V3 by the preset inter-vehicle distance D2 that is set in advance, similarly to the example of the scene shown in FIG. Yes.
- the inter-vehicle distance control is performed so that the host vehicle V1 travels away from the preceding vehicle V3 by the preset inter-vehicle distance D2 that is set in advance, similarly to the example of the scene shown in FIG. Yes.
- step S113 No
- Step S115 when the inter-vehicle distance with the preceding vehicle V3 is set to D3 shorter than the set inter-vehicle distance D2, it is determined whether the host vehicle V1 passes the front adjacent vehicle V2 before the curve ahead of the host vehicle V1.
- the inter-vehicle distance with the preceding vehicle V3 is changed to the distance D3 (step S116), and the inter-vehicle distance control for causing the host vehicle V1 to travel away from the preceding vehicle V3 by the inter-vehicle distance D3 is performed (step S112).
- the own vehicle V1 overtakes the front adjacent vehicle V2 in front of the curve, and the own vehicle V1 travels away from the preceding vehicle V3 by an inter-vehicle distance D3 while the vehicle is traveling on the curve.
- the vehicle V1 can travel along the curve without traveling in parallel with the front adjacent vehicle V2 while traveling on the curve.
- FIG. 13 is a plan view illustrating another scene where the host vehicle V1 travels a curve when the preceding vehicle V3 is present in front of the traveling lane of the host vehicle V1
- FIG. 14 is a scene illustrated in FIG. It is a top view for demonstrating the traveling control method of the own vehicle in FIG.
- the inter-vehicle distance from the front adjacent vehicle V2 is set to D1. Then, an inter-vehicle distance control is performed to cause the host vehicle V1 to travel away from the adjacent vehicle V2 by the inter-vehicle distance D1 (step S112).
- an inter-vehicle distance control is performed to cause the host vehicle V1 to travel away from the adjacent vehicle V2 by the inter-vehicle distance D1 (step S112).
- step S112 As a result, as shown in FIG. 14, by performing inter-vehicle distance control that causes the host vehicle V ⁇ b> 1 to travel by being separated from the front adjacent vehicle V ⁇ b> 2 by the inter-vehicle distance D ⁇ b> 1 while traveling on the curve, The host vehicle V1 can run along a curve without running in parallel with the vehicle V2.
- the distance between the host vehicle and the front adjacent vehicle in the traveling direction of the host vehicle is set to a predetermined distance D1 ( ⁇ 0). The inter-vehicle distance control for running the host vehicle is performed.
- the own vehicle overtakes the adjacent vehicle ahead, predicts the overtaking completion position PT, and whether the predicted overtaking completion position PT is in front of the curve arrival point PC (position close to the own vehicle) ( It is determined whether the vehicle is far from the host vehicle. Then, when the overtaking completion position PT is before the curve arrival point PC, it is determined that the own vehicle will pass the front adjacent vehicle before the curve, and the auto vehicle can overtake the front adjacent vehicle before the curve. Run control. As a result, not only can the host vehicle and the adjacent vehicle ahead run in a curve, but also automatic speed control that automatically runs at the set speed and automatic distance control that automatically follows the preceding vehicle at the set distance are given priority. can do.
- the overtaking completion position is ahead of the curve arrival point (a position far from the host vehicle)
- a distance between the vehicle in the traveling direction of the host vehicle is set to a predetermined distance D1 ( ⁇ 0), and an inter-vehicle distance control for running the host vehicle is performed. Thereby, it can avoid that the own vehicle and a front adjacent vehicle run in parallel on a curve.
- the host vehicle when there is a preceding vehicle that travels in front of the lane in which the host vehicle travels, the host vehicle is maintained while maintaining the host vehicle and the preceding vehicle at the set inter-vehicle distance set by the driver. It is determined whether or not the vehicle passes the adjacent vehicle ahead of the curve. Then, if it is determined that the host vehicle is passing the front adjacent vehicle before the curve while the host vehicle and the preceding vehicle are maintained at the set inter-vehicle distance set by the driver, the auto that overtakes the front adjacent vehicle before the curve Run control. Thereby, even when a preceding vehicle exists, it is possible to avoid the host vehicle and the vehicle adjacent to the front running in parallel on the curve while traveling on the curve.
- the host vehicle when there is a preceding vehicle that travels in front of the lane in which the host vehicle travels, the host vehicle is maintained while maintaining the host vehicle and the preceding vehicle at the set inter-vehicle distance set by the driver. Even if it is determined that the vehicle does not pass the front adjacent vehicle before the curve, by setting the inter-vehicle distance to the preceding vehicle to a value shorter than the current vehicle, the vehicle will follow the front adjacent vehicle before the road section. If it is determined that the vehicle will pass, the inter-vehicle distance from the preceding vehicle is set to the short value, and automatic traveling control is performed to overtake the vehicle adjacent to the vehicle ahead of the curve. As a result, not only can the host vehicle and the adjacent vehicle ahead run in a curve, but also automatic distance control that automatically follows the preceding vehicle at a set distance when there is a preceding vehicle. Can be executed.
- the curvature radius threshold according to the amount of variation in the lateral position of the front adjacent vehicle, the greater the degree of fluctuation of the front adjacent vehicle, the closer the host vehicle and the front adjacent vehicle are. Therefore, by considering the actual curve situation that cannot be read by the map database 120, it is possible to accurately select a curve that requires countermeasures for inter-vehicle distance control according to this embodiment.
- the travel control apparatus 100 has the same configuration as the travel control apparatus 100 of the embodiment shown in FIG. 1 and is the same as the above-described embodiment except that it operates as described below. Therefore, the structure is used here.
- the inter-vehicle distance control for the front adjacent vehicle is executed on the curve, but the inter-vehicle distance control of the present invention can be applied to a narrow road in addition to the curve.
- the traveling control process according to the present embodiment will be described with reference to FIG.
- Steps S301 to S304 are executed in the same manner as steps S101 to S104 in the embodiment shown in FIG. That is, the own vehicle information and surrounding information are acquired (steps S301 and S302), and the front adjacent vehicle and the preceding vehicle are specified (step S303). If there is a front adjacent vehicle (step S304), the process proceeds to step S305.
- step S305 a road shape determination process is performed by the road shape determination function to determine whether the road ahead of the host vehicle is a narrow road.
- FIG. 16 is a flowchart showing the road shape determination process according to the present embodiment.
- the road width W of the road ahead of the host vehicle is acquired by the road shape determination function.
- the road shape determination function can acquire the road width W of the road ahead of the host vehicle by referring to the current position of the host vehicle and the map database 120.
- step S402 the vehicle width B of the front adjacent vehicle is acquired based on the surrounding information acquired in step S302 by the road shape determination function.
- the road shape determination function can be configured to detect the vehicle width B of the adjacent vehicle on the basis of the image captured by the camera 150.
- the narrow road threshold Wth is set by the road shape determination function.
- the road shape determination function first calculates a ratio (B / W) between the road width W of the front road acquired in step S401 and the vehicle width B of the front adjacent vehicle V2 acquired in step S402. .
- the road shape determination function sets the narrow road threshold Wth according to the ratio (B / W) of the vehicle width B of the front adjacent vehicle V2 to the road width W of the front road.
- FIG. 17 is a graph (control map) showing an example of the relationship between the ratio (B / W) between the road width W of the front road and the vehicle width B of the front adjacent vehicle V2 and the narrow road threshold Wth .
- the road shape determination function sets the narrow road threshold W th when the ratio (B / W) of the vehicle width B of the front adjacent vehicle V2 to the road width W of the front road is less than X1.
- the road shape determination function is proportional to the ratio (B / W) when the ratio (B / W) of the vehicle width B of the front adjacent vehicle V2 to the road width W of the front road is greater than or equal to X1 and less than X2.
- the road shape determination function sets the narrow road threshold Wth to W1 when the ratio (B / W) of the vehicle width B of the front adjacent vehicle V2 to the road width W of the front road is equal to or greater than W1.
- X1, X2, W1, and W2 are not particularly limited, and can be set as appropriate through experiments or the like. That is, as the B / W is larger (the road width W is smaller and the vehicle width B is larger), the narrow road threshold Wth is increased. Therefore, even if the road width B is the same, the same vehicle width is increased. Even in B, the smaller the road width W is, the more frequently it is determined that the road is narrow.
- step S404 of FIG. 16 the road shape determining function, the road width W of the road ahead of the vehicle acquired in step S401 is whether or not the row determines whether a narrow road than the threshold W th set in step S403 Is called.
- the process proceeds to step S405, in step S405, a road shape judging function, forward road of the vehicle is the is narrow road Determined.
- the road width W of the road ahead of the vehicle is narrow road threshold W th or more, the process proceeds to step S406, in step S406, the road shape determining function, the road ahead of the vehicle in a narrow passage It is determined that there is no.
- step S405 after it is determined that the road ahead of the host vehicle is a narrow road, the process proceeds to step S407, and the road shape determination function causes the current vehicle position to reach the narrow road ahead of the host vehicle. The distance to the point is calculated.
- step S306 the process proceeds to step S306 shown in FIG.
- step S306 in FIG. 15 the overtaking determination function determines whether the road ahead of the host vehicle is a narrow road based on the determination result of the road shape determination process in step S305.
- the process proceeds to step S307, but the road ahead of the host vehicle is not a curve. (Step S406), the process proceeds to step S317.
- steps S307 and S308 similar to steps S107 and S108 in the embodiment shown in FIG. 2, when the host vehicle and the front adjacent vehicle travel at the current vehicle speed, the host vehicle passes the front adjacent vehicle. Prediction is performed (step S307), and it is determined whether there is a preceding vehicle ahead of the host vehicle (step S308).
- step S309 the overtaking determination function determines whether the own vehicle passes the adjacent vehicle in front of the narrow road ahead at the current traveling speed of the own vehicle. A determination is made whether or not. Specifically, the overtaking determination function determines whether or not the position predicted by the host vehicle in step S307 to pass the front adjacent vehicle is before the narrow road arrival point in front of the host vehicle. Then, when the position where the host vehicle overtakes the front adjacent vehicle is in front of the narrow road arrival point ahead of the host vehicle, it is determined that the host vehicle passes the front adjacent vehicle in front of the front narrow road. If the vehicle speed of the host vehicle is slower than the vehicle speed of the front adjacent vehicle and the position at which the host vehicle overtakes the front adjacent vehicle cannot be estimated, it is determined that the host vehicle does not pass the front adjacent vehicle in front of the narrow road ahead. .
- step S310 If it is determined that the host vehicle is passing the front adjacent vehicle before the narrow road ahead, the process proceeds to step S310, and the host vehicle is driven at the set vehicle speed set by the driver, as in step S110 of the first embodiment. Speed control is performed.
- step S311 when the host vehicle is driven at the current vehicle speed and it is determined that the host vehicle does not pass the front adjacent vehicle before the narrow road ahead, the process proceeds to step S311.
- steps S311, S312 as in steps S111, S112 of the embodiment shown in FIG. 2, the inter-vehicle distance between the host vehicle and the front adjacent vehicle is set to a predetermined distance D1 (step S311).
- Inter-vehicle distance control is performed to drive the host vehicle with the distance as D1 (step S312).
- step S313 it is determined by the overtaking determination function whether the adjacent vehicle ahead can be overtaken before the narrow road while the inter-vehicle distance from the preceding vehicle is maintained at the preset inter-vehicle distance D2. Is called. If it is determined that the host vehicle passes the adjacent vehicle ahead of the narrow road, the process proceeds to step S314, and the set inter-vehicle distance of the host vehicle is set to D2 as in step S114 of the embodiment shown in FIG. Is done.
- step S315 the overtaking determination function causes the preceding vehicle and the host vehicle to
- the inter-vehicle distance is changed to D3 that is shorter than the set inter-vehicle distance D2
- the process proceeds to step S316, and the set inter-vehicle distance of the host vehicle is changed to D3 as in steps S116 and S112 of the embodiment shown in FIG.
- step S316 inter-vehicle distance control is performed to drive the host vehicle with the inter-vehicle distance from the preceding vehicle as D3 (step S312).
- the process proceeds to step S311 and the inter-vehicle distance from the front adjacent vehicle as in steps S311 and S312 of the embodiment shown in FIG. Is set to D1 (step S311), and an inter-vehicle distance control is performed for causing the host vehicle to follow the front adjacent vehicle, with the inter-vehicle distance from the front adjacent vehicle being D1 (step S312).
- the present embodiment during automatic traveling control of the host vehicle, there is a narrow road in front of the host vehicle, and there is a front adjacent vehicle on the side of the adjacent lane of the traveling lane of the host vehicle. When doing, it is judged whether the own vehicle and the front adjacent vehicle run in parallel on a narrow road. When it is determined that the host vehicle and the front adjacent vehicle run side by side on a narrow road, the distance between the host vehicle and the front adjacent vehicle in the traveling direction of the host vehicle is set to a predetermined distance D1 ( ⁇ 0). Then, inter-vehicle distance control for running the host vehicle is performed.
- the narrow road threshold value Wth is set according to the ratio (B / W) of the vehicle width B of the front adjacent vehicle V2 to the road width W of the front road. Therefore, the inter-vehicle distance control according to the present embodiment. It is possible to select a narrow path that requires this measure with high accuracy.
- the inter-vehicle distance control for setting the inter-vehicle distance between the own vehicle and the front adjacent vehicle to D1 is not performed.
- the structure which made the own vehicle pass a front adjacent vehicle in front of a curve or a narrow path was illustrated.
- the present invention is not limited to this configuration. For example, it is not determined whether or not the host vehicle passes the front adjacent vehicle in front of a curve or a narrow road.
- the inter-vehicle distance control may be performed to set the inter-vehicle distance between the host vehicle and the front adjacent vehicle to D1. .
- the inter-vehicle distance control may be performed to set the inter-vehicle distance between the host vehicle and the front adjacent vehicle to D1.
- the configuration in which it is determined whether the host vehicle passes the front adjacent vehicle in front of a curve or a narrow road is not limited to this configuration.
- the host vehicle when the host vehicle is running in parallel on a straight road with an adjacent vehicle traveling in the adjacent lane, the host vehicle moves the adjacent vehicle in front of a curve or narrow road. It may be configured to determine whether or not to pass.
- the rear adjacent vehicle when there is a rear adjacent vehicle on the rear side of the host vehicle, it is determined whether the rear adjacent vehicle can pass the host vehicle in front of a curve or a narrow road.
- the vehicle may be driven away from the adjacent vehicle by a predetermined distance in the traveling direction of the vehicle.
- the present invention is not limited to a front adjacent vehicle that travels in front of the host vehicle. If there is an adjacent vehicle on the front side, right side, or rear side of the host vehicle, When the vehicle travels on a curve or narrow road, the inter-vehicle distance control is performed such that the vehicle travels away from the adjacent vehicle by a predetermined distance or more in the traveling direction of the vehicle. Is.
- the structure which judges whether a front road is a curve was illustrated by comparing the curvature radius of a front road, and a curvature radius threshold value.
- the present invention is not limited to this configuration, and for example, it may be configured to determine whether the road ahead is a curve by comparing the curvature of the road ahead and a curvature threshold.
- the control device 180 corresponds to the controller of the present invention
- the front adjacent vehicle V2 corresponds to the other vehicle of the present invention
- the curve and the narrow road correspond to the road section of the present invention
- the curve The arrival point and the narrow road arrival point correspond to the start point of the road section of the present invention.
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Abstract
Description
自車両が前記道路区間を走行するときに、自車両と前記他車両とが並走しない車間距離を設定して自車両を走行させることで、上記課題を解決する。
110…自車位置検出装置
120…地図データベース
130…車速センサ
140…測距センサ
150…カメラ
160…入力装置
170…駆動機構
180…制御装置
Claims (10)
- 自車両を自動走行制御中に、自車両の前方にカーブ又は狭路の少なくとも一方を含む道路区間が存在し、自車両の走行車線の隣接車線を他車両が走行している場合には、
自車両が前記道路区間を走行するときに、自車両と前記他車両とが並走しない車間距離を設定して自車両を走行させる車間距離制御を実行する車両の走行制御方法。 - 前記他車両が、自車両よりも前方を走行する場合において、
自車両の走行速度、前記他車両の走行速度及び自車両と前記他車両との車間距離に基づいて、自車両が前記他車両を追い抜く位置を予測し、
前記位置が前記道路区間の始点よりも自車両から遠い位置にある場合には、自車両が前記道路区間の手前で前記他車両を追い抜けないと判断し、前記車間距離制御を実行する請求項1に記載の車両の走行制御方法。 - 前記他車両が、自車両よりも前方を走行する場合において、
自車両の走行速度、前記他車両の走行速度及び自車両と前記他車両との車間距離に基づいて、自車両が前記他車両を追い抜く位置を予測し、
前記位置が前記道路区間の始点よりも自車両から近い位置にある場合には、自車両が前記道路区間の手前で前記他車両を追い抜けると判断し、前記他車両を追い抜く自動走行制御を実行するとともに、前記他車両に対する前記車間距離制御を実行しない請求項1に記載の車両の走行制御方法。 - 自車両の走行車線の前方を走行する先行車両が存在する場合において、
自車両の走行速度、前記先行車両の走行速度及び自車両と前記先行車両との車間距離、並びに自車両が前記他車両を追い抜く前記予測した位置に基づいて、自車両が、前記先行車両との少なくとも現在の車間距離を保ったまま前記道路区間の手前において前記他車両を追い抜けるか否かを判断し、
追い抜けると判断したときは、前記先行車両との現在の車間距離を保ったまま前記道路区間の手前において、前記他車両を追い抜く自動走行制御を実行する請求項3に記載の車両の走行制御方法。 - 自車両が前記他車両を追い抜けないと判断した場合において、
前記先行車両との車間距離を現在より短い値に設定することで、自車両が、前記道路区間の手前において前記他車両を追い抜けるか否かを判断し、
追い抜けると判断したときは、前記先行車両との車間距離を前記短い値に設定し、前記道路区間の手前において、前記他車両を追い抜く自動走行制御を実行する請求項4に記載の車両の走行制御方法。 - 自車両の前方の道路の曲率半径を取得し、
前記曲率半径が所定の曲率半径閾値未満の場合に、前記前方の道路が前記道路区間に含まれるカーブであると判断する請求項1~5のいずれか一項に記載の車両の走行制御方法。 - 前記他車両の一定期間における横位置の変動量を検出し、
前記横位置の変動量が所定値以上である場合には、前記横位置の変動量が前記所定値未満である場合に比べて、前記曲率半径閾値を大きく設定する請求項6に記載の車両の走行制御方法。 - 自車両の前方の道路の道路幅を取得し、
前記道路幅が所定の狭路閾値未満である場合に、自車両の前方の道路が前記道路区間に含まれる狭路であると判断する請求項1~5のいずれか一項に記載の車両の走行制御方法。 - 前記道路幅に対する前記他車両の車幅の割合を検出し、
前記割合が所定値以上である場合には、前記割合が前記所定値未満である場合に比べて、前記狭路閾値を大きく設定する請求項8に記載の車両の走行制御方法。 - 自車両の走行を自動制御する制御器を備えた車両の走行制御装置において、
前記制御器は、自車両を自動走行制御中に、自車両の前方にカーブ又は狭路の少なくとも一方を含む道路区間が存在し、自車両の走行車線の隣接車線を他車両が走行している場合には、
自車両が前記道路区間を走行するときに、自車両と前記他車両とが並走しない車間距離を設定して自車両を走行させる車間距離制御を実行する車両の走行制御装置。
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