Automobile running control system

• US 6,554,090 B1
• Filed: 07/03/2000
• Issued: 04/29/2003
• Est. Priority Date: 07/01/1999
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Minowa, Toshimichi, Kuroda, Hiroshi, Yoshikawa, Tokuji, Kuragaki, Satoru
• Primary Examiner(s): Morris, Lesley D.
• Assistant Examiner(s): Lum, L.
• Application Number:
  US09/609,764
• Time in Patent Office: 1,030 Days
• Field of Search: 180/167-9, 180/178, 180/179, 180/170, 701/93, 701/96
• US Class Current: 180/170
• CPC Class Codes: B60K 2360/179 Distances to obstacles or vehicles
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60K 35/22 Display screens
• CPC Class Codes: B60K 35/28 characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/12 Brake pedal position

Abstract

An automobile running control system having “Fast follow-up” and “Slow follow-up” modes controls so that the automobile may cruise at an optimum car-to-car space between the automobile and an object which is selected among those detected and faster than a preset ground velocity in the “Fast follow-up” mode. When the fast follow-up velocity of the automobile falls under the preset velocity, the system automatically enters the “Slow follow-up” mode.

Claims

1. A running control system for an automobile comprising,

a nearby object detector which detects a plurality of objects ahead of the automobile and for calculating a distance between the automobile and the objects nearby together with a ground velocity of the nearby objects;

a velocity detector which detects a velocity of the automobile; and

a velocity controller which automatically controls the velocity of the automobile;

wherein said velocity controller comprises a slow cruising mode and a fast cruising mode, and performs velocity control of the automobile through switching the cruising mode according to the velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value, or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, such that in said slow cruising mode a preset constant distance is maintained between the automobile and a first object selected from the plurality of objects detected by said nearby object detecting means, and in said fast cruising mode a constant distance is maintained between the automobile and a second object selected from the plurality of objects which second object has a ground velocity more than a preset ground velocity value.

2. The running control system for an automobile in accordance with claim 1,

wherein said velocity controller automatically changes the cruising mode from said fast cruising mode into said slow cruising mode when the velocity of the automobile falls under a preset ground velocity value.

3. A running control system for an automobile in accordance with claim 1, further comprising a display which delivers information by one or more of sound, image and light about running status of the automobile and nearby objects to a driver.

4. An automobile comprising a running control system according to claim 3.

5. An automobile comprising a running control system according to claim 1.

6. An automobile comprising a running control system according to claim 2.

11. An automobile comprising a running control system according to claim 6.

7. A running control system for an automobile comprising,

a nearby object detector which detects a plurality of objects ahead of the automobile and for calculating a distance between the automobile and the objects nearby together with a ground velocity of the nearby objects;

a velocity detector which detects a velocity of the automobile; and

a velocity controller which automatically controls the velocity of the automobile;

wherein said velocity controller comprises a slow cruising mode and a fast cruising mode and performs velocity control of the automobile through switching the cruising mode according to the velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, such that in said slow cruising mode a preset constant distance is maintained between the automobile and a first object selected from the plurality of objects, and in said fast cruising mode between the automobile and a second object selected from the plurality of objects which second object has a ground velocity more than a preset ground velocity value or has a distance from the automobile less than a preset distance.

8. An automobile comprising a running control system according to claim 7.

9. A running control system for an automobile in accordance with claim 7, further comprising a display which delivers information by one or more of sound, image and light about running status of the automobile and nearby objects to a driver.

10. A running control system for an automobile comprising,

a nearby object detector which detects a plurality of objects ahead of the automobile and for calculating a distance between the automobile and the objects nearby together with a ground velocity of the nearby first or second object;

a velocity detector which detects a velocity of the automobile; and

a velocity controller which automatically controls the velocity of the automobile;

wherein said velocity controller comprises a slow cruising mode and a fast cruising mode; and

a canceling means which cancels said slow cruising mode;

wherein said velocity controller performs velocity control of the automobile through switching the cruising mode according to the velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value, or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, such that the automobile runs at a preset maximum slow velocity in said slow cruising mode and said slow cruising mode is canceled when said canceling means is activated.

12. A running control system for an automobile in accordance with claim 10 comprising a display which delivers information by one or more of sound, image and light about running status of the automobile and nearby objects to a driver.

13. A velocity controller for an automobile to automatically control the velocity of the automobile based on distance between the automobile and objects nearby the automobile and on relative velocity of said objects to the automobile, wherein said velocity controller comprises a slow cruising mode and a fast cruising mode and performs velocity control of the automobile through switching the cruising mode according to the present velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value, or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, and said velocity of the automobile is controlled so that the automobile keeps a preset constant distance from a first object detected by a nearby object detector in said slow cruising mode, or keeps a preset constant distance from a second object having a ground velocity higher than a preset ground velocity value among objects detected by said nearby object detector in said fast cruising mode.

14. The velocity controller in accordance with claim 13,

wherein said velocity controller is configured to automatically change the cruising mode into said slow cruising mode which is activated when the velocity of the automobile falls under a preset velocity.

15. The velocity controller in accordance with claim 13,

wherein said velocity controller is configured to output the cruising mode of the automobile and observed aspects of the nearby objects to a display with at least one of sound, image, and light.

16. A velocity controller for an automobile to automatically control the velocity of the automobile based on distance between the automobile and objects nearby the automobile and on relative velocity of said objects to the automobile,

wherein

said velocity controller comprises a slow cruising mode and a fast cruising mode and controls the velocity of the automobile through switching the cruising mode according to the present velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value, or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, such that the automobile keeps a preset distance from a first object detected by a nearby object detector in said slow cruising mode, or keeps a preset constant distance from a second object detected by said nearby object detector having a ground velocity higher than a preset ground velocity value or having a distance from the automobile less than a preset distance in said fast cruising mode.

17. The velocity controller in accordance with claim 16,

wherein said velocity controller is configured to automatically change the cruising mode into said slow cruising mode which is activated when the velocity of the automobile falls under a preset velocity.

18. The velocity controller in accordance with claim 16,

wherein said velocity controller is configured to output the cruising mode of the automobile and observed aspects of the nearby objects to a display with at least one of sound, image, and light.

19. A velocity controller for an automobile to automatically control the velocity of the automobile based on distance between the automobile and objects nearby the automobile and on relative velocity of said objects to the automobile,

wherein said velocity controller comprises a slow cruising mode and a fast cruising mode and performs velocity control of the automobile through switching the cruising mode according to the present velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value,

said velocity of the automobile is controlled so that the automobile runs at a preset maximum slow velocity or less in said slow cruising mode, and

said velocity controller further comprises a canceling means for canceling said slow cruising mode to be operated by a driver of the automobile.

20. The velocity controller in accordance with claim 19,

wherein said velocity controller is configured to output the cruising mode of the automobile and observed aspects of the nearby objects to a display with at least one of sound, image, and light.

21. A method for controlling velocity of an automobile having a nearby object detector, velocity detector, and automatic velocity controller which controls a velocity of the automobile, said velocity controller comprising a slow cruising mode and a fast cruising mode, the method comprising

detecting a plurality of objects nearby the automobile, and calculating a distance between the automobile and the nearby objects and a ground velocity of the nearby objects,

controlling velocity of the automobile through switching the cruising mode according to a present velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value, or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, such that a preset distance is maintained between the automobile and a first object selected from the plurality of nearby objects in said slow cruising mode, or between the automobile and a second object selected from the plurality of nearby objects which second object has a ground velocity higher than a preset ground velocity value in said fast cruising mode.

22. The method in accordance with claim 21 wherein the cruising mode, when the fast cruising mode is active, is automatically changed into the slow cruising mode when a ground velocity of the automobile falls under a preset velocity.

23. A method in accordance with claim 21 wherein said automobile further comprises a display, the method further comprising

displaying the cruising mode of the automobile and observed aspects of the nearby at least one object with one or more of sound, image, and light.

24. A method for controlling velocity of an automobile having a nearby object detector, a velocity detector, and an automatic velocity controller which controls the velocity of the automobile, said velocity controller comprising a slow cruising mode and a fast cruising mode, the method comprising

detecting a plurality of objects nearby the automobile and calculating a distance between the automobile and the nearby objects and a relative velocity of the nearby objects,

controlling velocity of the automobile through switching the cruising mode according to a present velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, such that a preset distance is maintained between the automobile and a first object selected from the plurality of nearby objects in said slow cruising mode, or between the automobile and a second object selected from the plurality of nearby objects which second object has a ground velocity higher than a preset ground velocity value or has a distance from the automobile less than a preset distance in said fast cruising mode.

25. The method in accordance with claim 24 wherein the cruising mode, when the fast cruising mode is active, is automatically changed into the slow cruising mode when a ground velocity of the automobile falls under a preset velocity.

26. A method in accordance with claim 24 wherein said automobile further comprises a display, the method further comprising

displaying the cruising mode of the automobile and observed aspects of the nearby at least one object with one or more of sound, image, and light.

27. A method of controlling velocity of an automobile having a nearby object detector, and velocity controller, wherein said velocity controller comprises a slow cruising mode and a fast cruising mode, and a canceling means for canceling a slow cruising mode, the method comprising

detecting a plurality of objects nearby the automobile and calculating a distance between the automobile and the nearby objects together with a relative velocity of the nearby objects,

controlling a velocity of the automobile through switching the cruising mode according to the present velocity of the automobile into said slow cruising mode which is activated when the velocity of the automobile is lower than a predetermined value or into said fast cruising mode which is activated when the velocity of the automobile is higher than a predetermined value, such that the automobile runs at a preset maximum slow velocity or less in said slow cruising mode, and

canceling said slow cruising mode when said canceling means is actuated.

28. A method in accordance with claim 27 wherein said automobile further comprises a display, the method further comprising

displaying the cruising mode of the automobile and observed aspects of the nearby at least one object with one or more of sound, image, and light.