APPARATUS FOR CHANGING A VEHICLE SPEED SETTING OF CRUISE CONTROL

• US 20090240398A1
• Filed: 11/14/2007
• Published: 09/24/2009
• Est. Priority Date: 11/14/2006
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nanami, Takeshi
• Granted Patent: US 8,214,125 B2
• Time in Patent Office: Days
• US Class Current: 701/41
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2420/408 Radar; Laser, e.g. lidar
• CPC Class Codes: B60W 2552/05 Type of road, e.g. motorways, local streets, paved or unpaved roads
• CPC Class Codes: B60W 40/04 Traffic conditions

Abstract

A vehicle speed setting of cruise control is changed based on an operation by a driver. At this time, it is determined whether the vehicle is traveling in a passing lane or a traveling lane (S202). If the vehicle is traveling in a passing lane, the speed at which the vehicle speed setting is changed is increased (S206). If a blinker on the passing lane side of the vehicle is on (S205), the speed at which the vehicle speed setting is changed is also increased (S206) even if the vehicle is traveling in the traveling lane.

Claims

1. An apparatus of a cruise control system provided in a vehicle, which changes a vehicle speed setting of cruise control based on an operation by a driver, comprising:

a change time setting portion that changes a change speed of the vehicle speed setting according to a running environment of the vehicle; and

a change instructing portion that outputs a command to change the vehicle speed setting at the change speed that was set by the change time setting portion.

2. The apparatus according to claim 1, wherein the running environment is the type of road on which the vehicle is traveling.

3. The apparatus according to claim 2, wherein the road type includes an ordinary road and an expressway.

4. The apparatus according to claim 2, wherein the road type includes a traveling lane and a passing lane.

5. The apparatus according to claim 2, wherein the road type includes a straight road and a curved road.

6. The apparatus according to claim 1, wherein the cruise control system is an adaptive cruise control system, and the running environment is the presence or absence of a leading vehicle according to the adaptive cruise control system.

7. The apparatus according to claim 1, wherein the running environment is a speed of the vehicle.

8. The apparatus according to claim 1, wherein the running environment is a state of a driver.

9. The apparatus according to claim 1, wherein the operation by the driver includes a first operation and a second operation, and the duration of the second operation is longer than the duration of the first operation;

the vehicle speed setting is changed by a first predetermined change amount every time the first operation is performed, and the vehicle speed setting is changed by a second predetermined change amount which is greater than the first predetermined change amount every time the second operation is performed; and

the change time setting portion changes a change speed of the vehicle speed setting by increasing or decreasing the first predetermined change amount and the second predetermined change amount according to the running environment.

10. The apparatus according to claim 9, wherein the second operation is determined based on whether the operation by the driver is continued for a predetermined period of time;

and the change time setting portion changes the change speed of the vehicle speed setting by increasing or decreasing the predetermined period of time according to the running environment.

11. A cruise control system comprising:

the apparatus according to claim 2;

an image sensor for obtaining an image of an area around the vehicle;

a navigation system; and

a cruise control lever that is operated by the driver to change the vehicle speed setting,

wherein the apparatus further includes a lane detecting portion that determines the which lane the vehicle is traveling in based on information obtained from the image sensor and the navigation system; and

a lever operation detecting portion that detects an operation of the cruise control lever as well as the direction of that operation; and

the change time setting portion increases the change speed when it has been determined that the vehicle is traveling in a passing lane of an expressway and the direction of the operation of the cruise control lever is a direction that increases the vehicle speed setting.

12. The cruise control system according to claim 11, further comprising:

a turn indicator,

wherein the apparatus further includes a blinker detecting portion that detects the direction indicated by the turn indicator; and

wherein the change time setting portion increases the change speed when it has been determined that the vehicle is traveling in a traveling lane of an expressway, the direction indicated is to a passing lane side, and the direction of the operation of the cruise control lever is the direction that increases the vehicle speed setting.

13. A cruise control system comprising:

the apparatus according to claim 5;

an image sensor for obtaining an image of an area around the vehicle;

a yaw rate sensor;

a steering angle sensor;

a navigation system; and

a cruise control lever that is operated by the driver to change the vehicle speed setting,

wherein the apparatus further includes an optimum speed calculating portion which detects whether a road on which the vehicle is traveling is a curved road from information obtained from the image sensor and the navigation system, calculates a curvature of the road on which the vehicle is currently traveling and the curvature along a route that the vehicle is expected to travel based on information from the yaw rate sensor and the steering angle sensor in addition to the image sensor and the navigation system, and calculates a first optimum speed for the curvature of the road on which the vehicle is currently traveling and a second optimum speed for the curvature along the route that the vehicle is expected to travel;

a speed difference setting portion that calculates a first speed difference, which is a difference between the current vehicle speed setting and the first optimum speed, and a second speed difference, which is a difference between the current vehicle speed setting and the second optimum speed; and

a lever operation detecting portion that detects an operation of the cruise control lever as well as the direction of that operation; and

wherein the change time setting portion increases the change speed according to the greater difference, from among the first speed difference and the second speed difference, when at least one of the first speed difference and the second speed difference is a positive value and the direction of the operation of the cruise control lever is a direction that increases the vehicle speed setting.

14. A cruise control system comprising:

the apparatus according to claim 6;

an image sensor for obtaining an image of an area around the vehicle;

a millimeter wave sensor that detects an object by sending out millimeter waves; and

a cruise control lever that is operated by the driver to change the vehicle speed setting,

wherein the apparatus further includes a leading vehicle determining portion that determines whether there is a leading vehicle based on information obtained from the millimeter wave sensor and the image sensor, and a lever operation detecting portion that detects an operation of the cruise control lever as well as the direction of that operation; and

wherein the change time setting portion increases the change speed when it is determined that there is a leading vehicle and the direction of the operation of the cruise control lever is a direction that increases the vehicle speed setting.

15. A cruise control system comprising:

the apparatus according to claim 7;

a vehicle speed sensor that detects a vehicle speed; and

a cruise control lever that is operated by the driver to change the vehicle speed setting,

wherein the apparatus further includes a vehicle speed detecting portion that detects the vehicle speed based on information obtained from the vehicle speed sensor, and a comparing portion that compares the vehicle speed with a predetermined value; and

wherein the change time setting portion calculates a difference between the vehicle speed and the predetermined value when the vehicle speed is greater than the predetermined value, and increases the change speed as the difference increases.

16. A cruise control system comprising:

the apparatus according to claim 8;

a facing direction sensor that detects where the driver is facing; and

a cruise control lever that is operated by the driver to change the vehicle speed setting,

wherein the apparatus further includes a driver state detecting portion that detects the direction that the driver is facing based on information from the facing direction sensor, and a facing direction determining portion that determines whether the driver is facing forward based on information from the driver state detecting portion; and

wherein the change time setting portion decreases the change speed when the driver is not facing forward and the direction of the operation of the cruise control lever is a direction that increases the vehicle speed setting.