DRIVER ASSISTANCE SYSTEM FOR A MOTOR VEHICLE

• US 20100318256A1
• Filed: 07/17/2008
• Published: 12/16/2010
• Est. Priority Date: 10/20/2007
• Status: Active Grant

• Current Assignee: ZF CV Systems Europe BV (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: Wabco GmbH (Wabco Holdings Incorporated)
• Inventors: Kamping, Ruppert, Kitterer, Hartmut, Breuer, Karsten
• Granted Patent: US 8,655,564 B2
• Time in Patent Office: Days
• US Class Current: 701/29
• CPC Class Codes: B60T 2201/02 Active or adaptive cruise control system; Distance control
• CPC Class Codes: B60T 2201/022 Collision avoidance systems
• CPC Class Codes: B60T 2201/024 Collision mitigation 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 8/3275 Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity

Abstract

The invention relates to a driver assistance system for a motor vehicle (10), comprising at least one driving data sensor (20) for sensing driving data that characterizes the driving condition of the motor vehicle (10), and an electrical controller (26) which is designed to initiate autonomous emergency braking of the motor vehicle (10) when predetermined driving data has been sensed. According to the invention, a device is provided which is designed to detect a preceding vehicle (22) located in front of the motor vehicle (10) in the direction of travel of the motor vehicle (10). The electrical controller (26) is designed to maintain a brake of the motor vehicle (10) in a braking position or bring the brake into the braking position following an emergency braking action when the device detecting a preceding vehicle detects the preceding vehicle (22).

Claims

1. A driver assistance system for a motor vehicle (10), having:

(a) at least one driving data sensor (20) for sensing driving data which characterize the driving state of the motor vehicle (10)

and

(b) an electrical controller (26) which is designed to initiate an autonomous emergency braking operation of the motor vehicle (10) when predetermined driving data are present,

characterized by

(c) a preceding vehicle detection device which is configured to detect a preceding vehicle (22) located in front of the motor vehicle (10) in a direction of travel of the motor vehicle (10),

(d) wherein the electrical controller (26) is configured to hold a brake of the motor vehicle (10) in a braking position or to move it into the braking position after an emergency braking operation if the preceding vehicle detection device detects the preceding vehicle (22).

2. The driver assistance system as claimed in claim 1, characterized in that the electrical controller (26) is configured to move the brake into a release position after an emergency braking operation if the preceding vehicle detection device does not detect a preceding vehicle (22).

3. The driver assistance system as claimed in claim 1 or 2, characterized in that the electrical controller (26) is configured in such a way that it moves the brake into the braking position when the motor vehicle (10) is initially stationary after a stationary state owing to an emergency braking operation, and subsequently starts to roll again.

4. The driver assistance system as claimed in one of the preceding claims, characterized in that the electrical controller (26) is configured

to trigger an autonomous emergency braking operation of the motor vehicle (10) by virtue of the fact that it transmits a corresponding emergency braking signal to a service brake of the motor vehicle (10), and

to move a parking brake of the motor vehicle (10) into the braking position after an emergency braking operation.

5. The driver assistance system as claimed in one of the preceding claims, characterized by a deactivation device (40) for manually deactivating the driver assistance system.

6. A motor vehicle having a service brake, a parking brake and an electrical controller (26) as claimed in one of the preceding claims.

7. A method for operating a motor vehicle (10), having the steps:

(i) sensing whether an emergency braking operation has been carried out,

(ii) if this is the case, sensing whether a preceding vehicle (22) is located in front of the motor vehicle (10) in a direction of travel of the motor vehicle (10),

(iii) if, this is the case, sensing whether the motor vehicle (10) is stationary, and

(iv) if this is the case, moving the brake into a braking position or holding it in said braking position.

8. The method as claimed claim 7, characterized in that a parking brake is moved into the braking position.

9. The method as claimed in claim 7 or 8, characterized in that a deactivation device (40) is read, and when the deactivation device (40) has been activated the parking brake is released.