Vehicle control device

Patent metadata

Field	Value
Publication number	US-10953883-B2
Application number	US-201816173089-A
Country	US
Kind code	B2
Filing date	Oct 29, 2018
Priority date	Nov 1, 2017
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

The vehicle control device includes a speed profile generation unit configured to generate a speed profile of the vehicle in the lane change control, a vehicle control unit configured to control a vehicle speed of the vehicle along the speed profile when the lane change control is executed, and a deceleration condition determination unit configured to determine whether or not a deceleration condition in the lane change control is satisfied. The speed profile generation unit is configured to generate the speed profile such that a deceleration upper limit of the vehicle in the lane change control is lower in value when the deceleration condition determination unit determines that the deceleration condition is satisfied than when the deceleration condition determination unit determines that the deceleration condition is not satisfied.

First claim

What is claimed is:

1. A vehicle control device configured to perform lane change control for a vehicle along a preset lane change path, the vehicle control device comprising:
a memory configured to store map information; and
a processor configured to:
determine, based on the map information, whether a static factor in a traveling path of the lane change control causes deceleration of the vehicle that exceeds a certain value or more;
based on determining that a static factor in the traveling path of the lane change control causes a deceleration of the vehicle that exceeds the certain value, generate a first speed profile where a deceleration upper limit of the vehicle in the lane change control is a first value that is lower in value than a second value, and control a vehicle speed of the vehicle along the first speed profile when the lane change control is executed; and
based on determining that there is not a static factor in the traveling path of the lane change control that causes deceleration of the vehicle to exceed the certain value, generate a second speed profile where the deceleration upper limit of the vehicle in the lane change control is the second value, and control a vehicle speed of the vehicle along the second speed profile when the lane change control is executed.

2. The vehicle control device according to claim 1 , wherein the processor is further configured to determine that the static factor in the traveling path of the lane change control causes deceleration of the vehicle that exceeds the certain value or more when a curvature of a lane that is a lane change destination according to the lane change control is equal to or greater than a curve determination threshold.

3. The vehicle control device according to claim 1 , wherein
the map information includes information on set maximum speeds associated with lanes on a map, and
the processor is further configured to determine that the static factor in the traveling path of the lane change control causes deceleration of the vehicle that exceeds the certain value or more when a set maximum speed of a traveling lane of the vehicle exceeds the set maximum speed of a lane that is a lane change destination by a certain value or more.

4. The vehicle control device according to claim 1 , wherein the processor is further configured to generate one of the speed profiles by:
calculating each of a preset upper limit speed, a speed limit at a speed limit point included in the map information, a curvature corresponding speed that depends on a curvature of the traveling lane of the vehicle, and an obstacle situation speed that depends on a situation of a moving obstacle around the vehicle,
setting a target vehicle speed equal to or less than a lowest one of the upper limit speed, the speed limit, the curvature corresponding speed, and the obstacle situation speed for each of set positions preset along the lane change path, and
interpolating the target vehicle speed for each of the set positions so that the deceleration is equal to or less than the deceleration upper limit by preset smooth interpolation processing.

5. The vehicle control device according to claim 2 , wherein
the map information includes information on set maximum speeds associated with lanes on a map, and
the processor is further configured to determine that the static factor in the traveling path of the lane change control causes deceleration of the vehicle that exceeds the certain value or more when the set maximum speed of a traveling lane of the vehicle exceeds the set maximum speed of a lane that is a lane change destination by a certain value or more.

6. The vehicle control device according to claim 2 , wherein the processor is further configured to generate one of the speed profiles by:
calculating each of a preset upper limit speed, a speed limit at a speed limit point included in the map information, a curvature corresponding speed that depends on a curvature of the traveling lane of the vehicle, and an obstacle situation speed that depends on a situation of a moving obstacle around the vehicle,
setting a target vehicle speed equal to or less than a lowest one of the upper limit speed, the speed limit, the curvature corresponding speed, and the obstacle situation speed for each of set positions preset along the lane change path, and
interpolating the target vehicle speed for each of the set positions so that the deceleration is equal to or less than the deceleration upper limit by preset smooth interpolation processing.

7. The vehicle control device according to claim 3 , wherein the processor is further configured to generate one of the speed profiles by:
calculating each of a preset upper limit speed, a speed limit at a speed limit point included in the map information, a curvature corresponding speed that depends on a curvature of the traveling lane of the vehicle, and an obstacle situation speed that depends on a situation of a moving obstacle around the vehicle,
setting a target vehicle speed equal to or less than a lowest one of the upper limit speed, the speed limit, the curvature corresponding speed, and the obstacle situation speed for each of set positions preset along the lane change path, and
interpolating the target vehicle speed for each of the set positions so that the deceleration is equal to or less than the deceleration upper limit by preset smooth interpolation processing.

8. The vehicle control device according to claim 5 , wherein the processor is further configured to generate one of the speed profiles by:
calculating each of a preset upper limit speed, a speed limit at a speed limit point included in the map information, a curvature corresponding speed that depends on a curvature of the traveling lane of the vehicle, and an obstacle situation speed that depends on a situation of a moving obstacle around the vehicle,
setting a target vehicle speed equal to or less than a lowest one of the upper limit speed, the speed limit, the curvature corresponding speed, and the obstacle situation speed for each of set positions preset along the lane change path, and
interpolating the target vehicle speed for each of the set positions so that the deceleration is equal to or less than the deceleration upper limit by preset smooth interpolation processing.

9. The vehicle control device according to claim 1 , wherein the processor is further configured to determine that the static factor in the traveling path of the lane change control causes deceleration of the vehicle that exceeds the certain value or more when one of the following conditions occurs:
(1) when a curvature of a lane that is a lane change destination according to the lane change control is equal to or greater than a curve determination threshold, or
(2) when a set maximum speed of a traveling lane of the vehicle exceeds the set maximum speed of a lane that is a lane change destination by a certain value or more.

10. A vehicle control method implemented by a processor, the vehicle control method comprising:
storing map information;
determining, based on the map information, whether a static factor in a traveling path of the lane change control causes deceleration of the vehicle that exceeds a certain value or more;
based on determining that a static factor in the traveling path of the lane change control causes a deceleration of the vehicle that exceeds the certain value, generating a first speed profile where a deceleration upper limit of the vehicle in the lane change control is a first value that is lower in value than a second value, and controlling a vehicle speed of the vehicle along the first speed profile when the lane change control is executed; and
based on determining that there i

Assignees

• Toyota Motor Co Ltd

Inventors

• Sakaguchi Eiji

Classifications

• B62D15/0255 Primary

  Automatic changing of lane, e.g. for passing another vehicle · CPC title

• B60W50/14

  Means for informing the driver, warning the driver or prompting a driver intervention · CPC title

• B60W2556/50

  of positioning data, e.g. GPS [Global Positioning System] data · CPC title

• B60W10/18

  including control of braking systems · CPC title

• B60W2554/00

  Input parameters relating to objects · CPC title