Adaptive cruise control system and navigation system's media with vehicle control information included

• US 7,650,217 B2
• Filed: 06/28/2006
• Issued: 01/19/2010
• Est. Priority Date: 06/30/2005
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Ueyama, Mikio
• Primary Examiner(s): Zanelli; Michael J.
• Application Number:
  US11/475,928
• Publication Number:
  US 20070005218A1
• Time in Patent Office: 1,301 Days
• Field of Search: None
• US Class Current: 701/96
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle

Abstract

On the basis of headway distance information issued from a headway distance detecting device for detecting a headway distance between a controlled vehicle and a preceding vehicle and terrain shape information issued from a terrain shape estimating device for estimating a terrain shape around the position of the controlled vehicle, a terrain shape at a position spaced from the position of the controlled vehicle by the headway distance is detected, and the speed of the controlled vehicle is controlled according to the terrain shape information.

Claims

1. An adaptive cruise control apparatus of a controlled vehicle, comprising:

a terrain shape detector for detecting a terrain shape between a position of said controlled vehicle and a position spaced away therefrom by a headway distance between the controlled vehicle and a preceding vehicle on the basis of headway distance information issued from a headway distance detecting device for detecting said headway distance and terrain shape information issued from a terrain shape estimating device for estimating a terrain shape around the position of the controlled vehicle;

a vehicle speed controller for controlling a speed of said controlled vehicle on the basis of an output issued from said terrain shape detector;

a first cruise control executing means for controlling so as to keep the speed of the controlled vehicle at a target speed entered by the driver or externally inputted;

a second cruise control executing means for acquiring the headway distance information from said headway distance detecting device and controlling an actuator of the controlled vehicle so as to keep said headway distance at a headway distance set by the driver;

a preceding-vehicle lost cause determiner, when said preceding vehicle departs from a detection range of said headway distance detecting device and the preceding vehicle is lost at a time when the actuator is controlled by said second cruise control executing means, for determining whether or not the lost condition of said preceding vehicle is caused by a terrain shape on the basis of an output issued from said terrain shape detector;

a target speed setter, when said preceding-vehicle lost cause determiner determines that said preceding-vehicle lost condition is caused by the terrain shape, for setting a predetermined vehicle speed in said first cruise control executing means; and

a cruise control switch for switching to the first cruise control executing means with said predetermined vehicle speed set by said target speed setter.

2. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, wherein said target speed setter sets the target vehicle speed to be within the set vehicle speed set by the driver.

3. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, wherein said target speed setter sets the target vehicle speed at a speed of said controlled vehicle when said preceding vehicle is lost.

4. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, wherein, when said controlled vehicle arrives at a position away by said headway distance from the position of the controlled vehicle in a preceding vehicle lost state and fails to detect said preceding vehicle, said preceding-vehicle lost cause determiner, on the basis of a headway distance in said preceding vehicle lost state and the terrain shape information from said terrain shape estimating device, again determines whether or not said preceding-vehicle lost condition is caused by a terrain shape.

5. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, wherein, when said controlled vehicle arrives at the position away by said headway distance from the position of said controlled vehicle in the preceding-vehicle lost condition, said cruise control switch switches to said second cruise control means or to the first cruise control means with the target vehicle speed set by the driver.

6. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, wherein, when said controlled vehicle arrives at a site point spaced by a headway distance corresponding to an integral multiple of said headway distance from the position of the controlled vehicle in the preceding-vehicle lost condition, said cruise control switch switches to said second cruise control means.

7. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, wherein said preceding-vehicle lost cause determiner uses the terrain shape information about a terrain shape over the headway distance in said preceding-vehicle lost condition obtained from said terrain shape estimating device as an inclination difference between the position of said controlled vehicle in the preceding-vehicle lost condition and a position spaced by said headway distance from the position of said controlled vehicle.

8. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, wherein said preceding-vehicle lost cause determiner uses the terrain shape information about a terrain shape over the headway distance in said preceding-vehicle lost condition obtained from said terrain shape estimating device as an advancing angle difference between the position of said controlled vehicle in the preceding-vehicle lost condition and a position spaced by said headway distance from the position of said controlled vehicle.

9. An adaptive cruise control apparatus of a controlled vehicle according to claim 1, comprising a unit for displaying said preceding-vehicle lost condition or outputting the preceding-vehicle lost condition by sound when said preceding-vehicle lost cause determiner determines that said preceding-vehicle lost condition is caused by the terrain shape.

10. An adaptive cruise control system of a controlled vehicle, comprising:

a headway distance detecting device for detecting a headway distance between a controlled vehicle and a preceding vehicle;

a terrain shape estimating device for estimating a terrain shape;

a terrain shape detector for detecting a terrain share between a position of said controlled vehicle and a position spaced by said headway distance on the basis of headway distance information issued from said headway distance detecting device and terrain share information issued from said terrain share estimating device; and

a vehicle speed controller for controlling a speed of said controlled vehicle on the basis of an output issued from said terrain share detector;

wherein said cruise control apparatus comprises;

a first cruise control mode for controlling the controlled vehicle so as to keep a speed of the controlled vehicle at a target vehicle speed entered by the driver or externally inputted;

a second cruise control mode for acquiring headway distance information from said headway distance detecting device and controlling an actuator of the controlled vehicle so as to keep said headway distance at a set headway distance set by the driver;

a preceding-vehicle lost cause determiner, when the preceding vehicle departs from a detection range of said headway distance detecting device and the preceding vehicle is lost in said second cruise control mode, for determining whether or not the lost condition of said preceding vehicle is caused by a terrain shape on the basis of an output issued from said terrain shape detector;

a target speed setter, when said preceding-vehicle lost cause determiner determines that the lost condition of said preceding vehicle is caused by the terrain shape, for setting a predetermined target vehicle speed in said first cruise control mode; and

a cruise control mode switch for switching to the first cruise control mode with said predetermined target vehicle speed set by said target speed setter.

11. An adaptive cruise control system of a controlled vehicle according to claim 10, wherein said terrain shape estimating device comprises a memory for storing the terrain shape information for use in said preceding-vehicle lost cause determiner.

12. An adaptive cruise control system of a controlled vehicle according to claim 11, wherein, when the terrain shape information stored in said memory is road inclination information and when an inclination difference between the position of said controlled vehicle and a position spaced from the position of said controlled vehicle by said headway distance in a preceding-vehicle lost condition is not smaller than a predetermined value on the basis of the inclination information, said preceding-vehicle lost cause determiner determines that the lost condition of said preceding vehicle is caused by the terrain shape.

13. An adaptive cruise control system of a controlled vehicle according to claim 11, wherein, when the terrain shape information stored in said memory is curvature information about a curve in a road and when an advancing angle difference between the position of said controlled vehicle and a position spaced from the position of said controlled vehicle by said headway distance in a preceding-vehicle lost condition is not smaller than a predetermined value on the basis of the curvature information, said preceding-vehicle lost cause determiner determines that the lost condition of said preceding vehicle is caused by the terrain shape.