Driver assistance apparatus and driver assistance method

Patent metadata

Field	Value
Publication number	US-11970167-B2
Application number	US-202217586864-A
Country	US
Kind code	B2
Filing date	Jan 28, 2022
Priority date	Feb 1, 2021
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

Disclosed herein, a driver assistance apparatus includes a detector installed in a vehicle, the detector having a view in front of a vehicle and configured to obtain detection data; and a controller including a processor configured to process the detection data; wherein the controller is configured to identify operation of a wiper of the vehicle and calculate a slip rate of the vehicle with respect to a road surface while performing an adaptive cruise control (ACC) that maintains a distance with a vehicle in front at a first distance based on the detection data, and control a driving of the vehicle to maintain the distance with the vehicle in front to a second distance greater than the first distance based on the operation of the wiper and the slip rate.

First claim

What is claimed is:

1. A driver assistance apparatus, comprising:
a detector installed in a vehicle, the detector having a view in front of a vehicle and configured to obtain detection data; and
a controller including a processor configured to process the detection data;
wherein the controller is configured to:
perform an adaptive cruise control (ACC) that maintains a distance with a vehicle in front at a first distance based on the detection data,
determine, while the ACC is performed, a slip rate of the vehicle with respect to a road surface when a condition of an operation of a wiper is satisfied, wherein the condition comprises an operating speed of a wiper exceeds a predetermined speed for a predetermined duration, and
control a driving of the vehicle to maintain the distance with the vehicle in front to a second distance greater than the first distance upon determining the slip rate is greater than a reference value.

2. The driver assistance apparatus of claim 1 , wherein the controller is configured to:
increase a predetermined reference time gap related to distance control between the vehicle and the vehicle in front to a predetermined amount based on the operation of the wiper and the slip rate;
identify a speed of the vehicle to be controlled based on the predetermined reference time gap increased by the predetermined amount and the first distance; and
control the driving of the vehicle so that the distance between the vehicle and the vehicle in front is changed to the second distance based on the identified speed.

3. The driver assistance apparatus of claim 1 , wherein the controlling of the driving of the vehicle comprises controlling the vehicle to travel in deceleration, and
the controller is configured to:
adjust downward an allowable maximum value of a predetermined acceleration of the vehicle based on the operation of the wiper and the slip ratio, and
control the driving of the vehicle so that the vehicle decelerates based on the downward adjustment of the allowable maximum value of the predetermined acceleration.

4. The driver assistance apparatus of claim 1 , wherein the controller is configured to:
identify weather conditions outside the vehicle as a rainy or snowy condition based on the operation of the wiper and the slip rate, and
control the driving of the vehicle in response to identification of the weather conditions outside the vehicle as a rainy or snowy condition.

5. The driver assistance apparatus of claim 1 , wherein the controller is configured to:
identify external temperature information received from a temperature sensor of the vehicle, and
control the driving of the vehicle further based on the external temperature information being less than or equal to a predetermined reference temperature.

6. The driver assistance apparatus of claim 1 , wherein the controller is configured to:
calculate a gradient of the road surface based on a signal received from a gyro sensor of the vehicle, and
control the driving of the vehicle further based on the gradient of the road surface.

7. The driver assistance apparatus of claim 1 , wherein the controller is configured to calculate the slip ratio based on the speed of the vehicle and a rotation speed of each wheel of the vehicle.

8. A driver assistance apparatus, comprising:
a first detector installed in a vehicle, the first detector having a view in front of a vehicle and configured to obtain first detection data; and
a controller including a processor configured to process the first detection data,
wherein the controller is configured to:
change a reference control timing of an adaptive cruise control (ACC) for maintaining a distance with a vehicle in front as a first distance based on the first detection data, in response to an operation speed of a wiper of the vehicle being greater than or equal to a predetermined speed;
identify a control timing corresponding to the changed reference control timing of the ACC; and
in response to the identification of the control timing, control a driving of the vehicle to maintain the distance with the vehicle in front to a second distance greater than the first distance.

9. The driver assistance apparatus of claim 8 , further comprises at least one second detector,
wherein the controller is configured to:
turn on the at least one second detector based on an operation of the wiper, and
identify the control timing further based on second detection data obtained through the at least one second detector.

10. The driver assistance apparatus of claim 8 , wherein the controller is configured to rapidly change a predetermined braking responsiveness of the vehicle to a first speed based on the operation speed of the wiper being greater than or equal to the predetermined speed.

11. The driver assistance apparatus of claim 8 , wherein the controller is configured to change a distance step between the vehicle and the vehicle in front to a predetermined distance step based on the operation speed of the wiper being greater than or equal to the predetermined speed, and the predetermined distance step corresponds to the second distance.

12. The driver assistance apparatus of claim 8 , wherein the controller is configured to control an output device to output a warning signal through the output device of the vehicle in response to that a control value of an accelerator of the vehicle based on a user manipulation is greater than or equal to a predetermined reference value.

13. The driver assistance apparatus of claim 12 , wherein the controller is configured to release the ACC in response to that the control value of the accelerator of the vehicle is greater than or equal to the predetermined reference value.

14. A driver assistance method, the method comprising the steps of:
performing an adaptive cruise control (ACC) for maintaining a distance with a vehicle in front at a first distance based on detection data obtained through a detector;
determine, while the ACC performed, a slip rate of the vehicle with respect to a road surface when a condition of an operation of a wiper is satisfied, wherein the condition comprises an operating speed of a wiper exceeds a predetermined speed for a predetermined duration; and
controlling a driving of the vehicle to maintain the distance with the vehicle in front to a second distance greater than the first distance upon determining the slip rate is greater than a reference value.

15. The method of claim 14 , wherein the step of controlling comprises:
increasing a predetermined reference time gap related to distance control between the vehicle and the vehicle in front to a predetermined amount based on the operation of the wiper and the slip rate;
identifying a speed of the vehicle to be controlled based on the predetermined reference time gap increased by the predetermined amount and the first distance; and
controlling the driving of the vehicle so that the distance between the vehicle and the vehicle in front is changed to the second distance based on the identified speed.

16. The method of claim 14 , further comprising a step of:
adjusting downward an allowable maximum value of a predetermined acceleration of the vehicle based on the operation of the wiper and the slip ratio, and
controlling the driving of the vehicle so that the vehicle decelerates based on the downward adjustment of the allowable maximum value of the predetermined acceleration.

17. The method of claim 14 , wherein the step of controlling comprises:
identifying weather conditions outside the vehicle as a rainy or snowy condition b

Assignees

• Hl Klemove Corp

Inventors

• Park Hyunsoo

Classifications

• B60W30/162 Primary

  Speed limiting therefor · CPC title

• B60W40/02

  related to ambient conditions · CPC title

• B60W40/06

  Road conditions · CPC title

• B60W2510/30

  Auxiliary equipments · CPC title

• B60W2520/26

  Wheel slip · CPC title