Vehicle and method for controlling the same

Patent metadata

Field	Value
Publication number	US-2017174210-A1
Application number	US-201615132939-A
Country	US
Kind code	A1
Filing date	Apr 19, 2016
Priority date	Dec 22, 2015
Publication date	Jun 22, 2017
Grant date	—

Abstract

Disclosed herein are a vehicle configured to prevent a collision and a control method thereof. The vehicle includes a chassis; a steering unit configured to change a direction of the chassis; a brake unit configured to adjust a braking force of the chassis; a detector configured to detect movement information of the chassis; and a controller configured to confirm a variation rate of movement of the chassis based on the detected movement information and configured to automatically control an operation of the steering unit and the brake unit when the confirmed variation rate is out of a reference range. When a collision occurs, the vehicle may automatically perform at least one of steering control, side braking control, or a damping control, and thus a secondary collision may be prevented, the incidence of additional injury may be reduced, the speed of the vehicle may be stably reduced or stopped, and the vehicle may be moved to a safe lane so that a stabilization time of the vehicle may be reduced.

First claim

What is claimed is:

1 . A vehicle comprising:
a chassis; a steering unit configured to change a direction of the chassis; a brake unit configured to adjust a braking force of the chassis; a detector configured to detect movement information of the chassis; and a controller configured to confirm a variation rate of movement of the chassis based on the detected movement information and configured to automatically control an operation of the steering unit and the brake unit when the confirmed variation rate is out of a reference range.

2 . The vehicle of claim 1 further comprising:
a body provided in the chassis; and
a transmission unit configured to absorb vibration of the body,
wherein the controller controls the transmission unit in a hard manner when the confirmed variation rate is out of the reference range.

3 . The vehicle of claim 1 wherein
the detector comprises a yaw rate detector configured to detect a yaw rate corresponding to a rotation movement of the chassis and a lateral acceleration detector configured to detect a lateral acceleration corresponding to a lateral movement of the chassis.

4 . The vehicle of claim 1 wherein
the controller controls one side brake of the brake unit based on the detected movement information when the confirmed variation rate is out of the reference range.

5 . The vehicle of claim 1 wherein
the controller confirms a yaw rate in the movement information when the confirmed variation rate is out of the reference range, confirms a rotation direction of the body based on the confirmed yaw rate, and controls a steering angle of the steering unit based on the confirmed yaw rate and rotation direction.

6 . The vehicle of claim 1 further comprising:
a brake pedal configured to receive a braking command from a user; and
a steering wheel configured to receive a steering command from the user,
wherein the controller is configured to release the automatic control when at least one of the braking command or the steering command is received, and to control at least one of the brake unit or the steering unit based on the received at least one of command.

7 . The vehicle of claim 6 further comprising:
an emergency light, wherein the controller is configured to turn on the emergency light when the automatic control is performed.

8 . The vehicle of claim 7 wherein
the controller is configured to turn on the emergency light when the at least one command is not received during the automatic control.

9 . The vehicle of claim 8 wherein
the controller is configured to control the brake unit so that a speed of the vehicle is reduced or stopped when the at least one command is not received during the automatic control.

10 . The vehicle of claim 1 further comprising:
a warning unit configured to output a warning sound, wherein the controller is configured to control an operation of the warning unit when the automatic control is performed.

11 . The vehicle of claim 1 wherein
the controller is configured to detect movement information of the chassis during the automatic control, and to complete the automatic control based on a variation rate corresponding to the detected movement information.

12 . The vehicle of claim 1 wherein
the controller is configured to recognize a lane during the automatic control, and to control driving in the lane based on the recognized lane information.

13 . The vehicle of claim 1 wherein
the controller is configured to recognize a lane when a variation rate of the movement of the chassis is reduced during the automatic control, to determine whether the chassis is departed from the lane based on the recognized lane information, and to control a steering angle and a braking force again when the chassis is departed from the lane.

14 . The vehicle of claim 12 further comprising:
an image detector configured to detect an image of a road, wherein the controller is configured to recognize a lane through performing an image processing on the detected road image.

15 . A control method of a vehicle comprising:
detecting a wheel speed and a steering angle of a vehicle; estimating a variation rate of movement of the vehicle based on the detected wheel speed and steering angle; detecting a yaw rate and a lateral acceleration of the vehicle; confirming a variation of real movement of the vehicle based on the detected yaw rate and lateral acceleration; and determining whether a collision occurs based on the estimated variation rate and the confirmed variation rate of real movement, and controlling automatically steering and braking when it is determined that the collision occurs.

16 . The control method of claim 15 wherein
the determination of whether a collision occurs comprises estimating a yaw rate and a lateral acceleration based on the detected wheel speed and steering angle, confirming a reference range corresponding to the estimated yaw rate and lateral acceleration, and determining that the collision occurs when the variation rate of real movement of the vehicle is out of the reference range.

17 . The control method of claim 15 further comprising:
controlling a transmission unit in a hard manner when the variation rate of real movement of the vehicle is out of the reference range.

18 . The control method of claim 15 wherein
the control of the steering and the braking comprises controlling one side brake and braking force of the brake unit in the variation rate of the real movement; and when the variation rate of the real movement of the vehicle is out of the reference range, confirming the detected yaw rate, confirming a rotation direction of the vehicle based on the confirmed yaw rate, and controlling a steering angle of the steering unit based the confirmed yaw rate and rotation direction.

19 . The control method of claim 15 further comprising:
controlling an operation of the warning unit so that a warning sound is generated when the automatic control is performed.

20 . The control method of claim 15 further comprising:
releasing the automatic control when at least one of a braking command that is through a brake pedal or a steering command that is through a steering wheel is received; and
controlling at least one of the brake unit or the steering unit based on the received at least one command.

21 . The control method of claim 20 further comprising:
determining whether at least one command is received when a predetermined time is expired from when the automatic control is started;
turning on an emergency light when the at least one command is not received; and
controlling the brake unit so that a speed of the vehicle is reduced or stopped.

22 . The control method of claim 21 further comprising:
confirming a variation rate of movement of the chassis during the automatic control; and
completing the automatic control based on the confirmed variation.

23 . The control method of claim 15 further comprising
recognizing a lane during the automatic control; and
controlling driving in the lane based on the recognized lane information.

24 . The control method of claim 15 further comprising
recognizing a lane when the variation rate of the real movement is reduced during the automatic control;
determining whether the vehicle is departed from a lane based on the recognized lane information; and
controlling steering and braking again when the vehicle is departed fro

Assignees

• Hyundai Motor Co Ltd

Inventors

• Choi Youn Seok
• Suh Jee Yoon

Classifications

• B60W10/20 Primary

  including control of steering systems · CPC title

• B60W2554/00

  Input parameters relating to objects · CPC title

• B62D6/00

  Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits (means for initiating a change in direction B62D1/00; steering valves B62D5/06; combined with means for inclining the vehicle body or wheels on bends B62D9/00) · CPC title

• B60W30/09

  Taking automatic action to avoid collision, e.g. braking and steering · CPC title

• B60W30/08 Primary

  Active safety systems} predicting or avoiding probable or impending collision {or attempting to minimise its consequences · CPC title