Method for Performing a Braking Maneuver Using a Vehicle Braking Assistant

• US 20170210367A1
• Filed: 07/06/2015
• Published: 07/27/2017
• Est. Priority Date: 07/28/2014
• Status: Active Grant

• Current Assignee: Conti Temic Microelectronic GmbH (Continental AG)
• Original Assignee: Conti Temic Microelectronic GmbH (Continental AG)
• Inventors: BANEU, Mihai, FUCHS, Guido, GOETZ, Mario, STEURER, Helmut, VOGL, Armin
• Granted Patent: US 10,189,455 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60T 2201/022 Collision avoidance systems
• CPC Class Codes: B60T 2201/03 Brake assistants
• CPC Class Codes: B60T 7/22 initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle , or by means of contactless obstacle detectors mounted on the vehicle
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence
• CPC Class Codes: B60T 8/3205 acceleration B60T8/34, B60T8/52, B60T8/54, B60T8/56, B60T8/58, B60T8/72, B60T8/86, B60T8/88 take precedence
• CPC Class Codes: B60T 8/321 deceleration B60T8/34, B60T8/52, B60T8/54, B60T8/56, B60T8/58, B60T8/72, B60T8/86, B60T8/88 take precedence
• CPC Class Codes: B60T 8/74 sensing a rate of change of velocity
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle

Abstract

The invention relates to a method for performing a braking maneuver using a braking assistant (9) in a motor vehicle (3), wherein the braking assistant (9) initiates an automatic braking maneuver when a distance between the motor vehicle (3) and an object (5) located ahead of the motor vehicle (3) is less than a minimum distance a_min, an acceleration signal of the decelerating vehicle (3) is ascertained, and if the acceleration signal is positive the braking maneuver initiated by the braking assistant (9) is automatically interrupted.

Claims

1. A method for performing a braking maneuver using a braking assistant (9) in a motor vehicle (3), wherein the braking assistant (9) initiates an automatic braking maneuver when a distance between the motor vehicle (3) and an object (5) located ahead of the motor vehicle (3) is less than a minimum distance a_min, wherein an acceleration signal of the decelerating vehicle (3) is ascertained, and wherein if the acceleration signal is positive the braking maneuver performed by the braking assistant (9) is automatically interrupted.

2. The method according to claim 1, wherein the acceleration signal is ascertained by means of an onboard acceleration sensor (11).

3. The method according to claim 1, wherein the current change in speed of the vehicle (3) is ascertained based on the acceleration signal.

4. The method according to claim 1, wherein the current change in speed of the vehicle (3) is ascertained by integration of the acceleration signal.

5. The method according to claim 4, wherein, to ascertain the current change in speed of the vehicle (3), an acceleration integrator is used.

6. The method according to claim 5, wherein, as the acceleration integrator, a low-pass filter is used.

7. The method according to claim 3, wherein the current change in speed of the vehicle (3) is compared with a specified speed threshold.

8. The method according to claim 7, wherein, if the speed threshold is exceeded, the braking maneuver of the vehicle (3) is automatically interrupted.

9. A method of braking a motor vehicle with an automatic braking assistant system of the vehicle, comprising steps:

a) initiating an automatic braking of the motor vehicle with the automatic braking assistant system;

b) while the automatic braking is proceeding, with a sensor of the motor vehicle producing a sensor signal that is indicative of an acceleration of the motor vehicle, and evaluating the sensor signal to determine a sign of the acceleration; and

c) when the sign of the acceleration is positive while the automatic braking is proceeding, then in response thereto automatically interrupting the automatic braking of the motor vehicle with the automatic braking assistant system.

10. The method according to claim 9, further comprising the step:

d) when the sign of the acceleration is negative while the automatic braking is proceeding, then in response thereto automatically continuing the automatic braking of the motor vehicle with the automatic braking assistant system.

11. The method according to claim 9, wherein the step a) comprises detecting a spacing distance between the motor vehicle and an object located in front of the motor vehicle, comparing the detected spacing distance to a distance threshold, and when the detected spacing distance falls below the distance threshold then in response thereto performing the initiating of the automatic braking of the motor vehicle.

12. The method according to claim 9, excluding determining a direction of travel of the motor vehicle other than as indicated indirectly by the sign of the acceleration.