Method and Device for Lessening the Consequences of an Accident on a Vehicle Occupant

• US 20120265407A1
• Filed: 06/26/2012
• Published: 10/18/2012
• Est. Priority Date: 01/22/2010
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: ZIMMERMANN, Markus, GRUBER, Christian
• Granted Patent: US 8,442,726 B2
• Time in Patent Office: Days
• US Class Current: 701/45
• CPC Class Codes: B60N 2/4221 due to impact coming from the front
• CPC Class Codes: B60N 2/427 Seats or parts thereof displaced during a crash
• CPC Class Codes: B60N 2/4279 electric or electronic triggering
• CPC Class Codes: B60R 2021/01034 Controlling a plurality of restraint devices
• CPC Class Codes: B60R 2021/01272 Belt tensioners
• CPC Class Codes: B60R 21/0134 responsive to imminent contact with an obstacle , e.g. using radar systems

Abstract

A method and device are provided for lessening the consequences of an accident affecting a vehicle occupant in the event of a collision of the vehicle with an obstruction. Before the collision, the absolute speed of the vehicle occupant relative to the obstruction is reduced independently of the traveling speed of the vehicle by way of a reduction of the vehicle occupant'"'"'s speed relative to the vehicle, without the vehicle occupant experiencing a first displacement movement against the vehicle movement direction beyond his initial destination-related traveling position.

Claims

1. A method of lessening consequences of an accident affecting a vehicle occupant in an event of a collision of a vehicle with an obstruction, the method comprising the acts of:

detecting an imminent collision of the vehicle; and

before the collision occurs, reducing an absolute speed of the vehicle occupant relative to the obstruction independently of a traveling speed of the vehicle by way of a reduction of a speed of the vehicle occupant relative to the vehicle without the vehicle occupant experiencing a first displacement movement against a vehicle movement direction beyond an initial destination-related traveling position.

2. The method according to claim 1, wherein the act of reducing the absolute speed of the vehicle occupant relative to the obstruction further comprises the acts of:

accelerating the vehicle occupant in a first time period before the collision to an absolute speed higher than the traveling speed of the vehicle; and

braking the vehicle occupant in a second time period before the collision to a speed below the traveling speed of the vehicle during the collision with the obstruction.

3. The method according to claim 2, wherein displacement movements in the first and second time periods occur, in each case, with a largely consistent amount of acceleration.

4. The method according to claim 2, wherein devices act upon the vehicle occupant during the first time period to accelerate the vehicle occupant by an acceleration factor of less than or equal to largely six times the gravitational acceleration.

5. The method according to claim 3, wherein devices act upon the vehicle occupant during the first time period to accelerate the vehicle occupant by an acceleration factor of less than or equal to largely six times the gravitational acceleration.

6. The method according to claim 2, wherein devices for braking the vehicle occupant act, during the second time period, upon the vehicle occupant by an acceleration factor such that, before the collision, the vehicle occupant experiences and maintains a negative speed relative to the vehicle.

7. The method according to claim 3, wherein devices for braking the vehicle occupant act, during the second time period, upon the vehicle occupant by an acceleration factor such that, before the collision, the vehicle occupant experiences and maintains a negative speed relative to the vehicle.

8. The method according to claim 4, wherein devices for braking the vehicle occupant act, during the second time period, upon the vehicle occupant by an acceleration factor such that, before the collision, the vehicle occupant experiences and maintains a negative speed relative to the vehicle.

9. The method according to claim 5, wherein devices for braking the vehicle occupant act, during the second time period, upon the vehicle occupant by an acceleration factor such that, before the collision, the vehicle occupant experiences and maintains a negative speed relative to the vehicle.

10. The method according to claim 2, wherein devices act upon the vehicle occupant such that, during the first and second time periods, an upper body of the vehicle occupant is maintained in a moving direction of the vehicle in an area between a steering wheel and a seating device of the vehicle.

11. The method according to claim 3, wherein devices act upon the vehicle occupant such that, during the first and second time periods, an upper body of the vehicle occupant is maintained in a moving direction of the vehicle in an area between a steering wheel and a seating device of the vehicle.

12. The method according to claim 4, wherein devices act upon the vehicle occupant such that, during the first and second time periods, an upper body of the vehicle occupant is maintained in a moving direction of the vehicle in an area between a steering wheel and a seating device of the vehicle.

13. The method according to claim 8, wherein devices act upon the vehicle occupant such that, during the first and second time periods, an upper body of the vehicle occupant, is maintained in a moving direction of the vehicle in an area between a steering wheel and a seating device of the vehicle.

14. A system for lessening consequences of an accident affecting a vehicle occupant in an event of a collision with a vehicle with an obstruction, the system comprising:

a collision detector that detects an imminent collision of the vehicle with the obstruction; and

a vehicle occupant restraining system comprising a vehicle occupant accelerator that, before an occurrence of the collision, accelerates the vehicle occupant in a first time period before the collision to an absolute speed higher than a traveling speed of the vehicle, and brakes the vehicle occupant in a second time period before the collision to a speed below the traveling speed of the vehicle during the collision with the obstruction.

15. The system according to claim 14, wherein the vehicle occupant restraining system utilizes a gas bag for accelerating the vehicle occupant during the first time period, and utilizes at least one of a belt system and gas bag for braking the vehicle occupant in the second time period.

16. A method of operating a vehicle occupant restraining system to reduce consequences of an accident affecting a vehicle occupant in an event of a collision of the vehicle with an obstruction, the method comprising the acts of:

detecting an imminent collision of the vehicle with an obstruction;

upon detecting the imminent collision, accelerating the vehicle occupant in a forward direction of the vehicle in a first time period before the collision to an absolute speed higher than the forward traveling speed of the vehicle; and

subsequently accelerating the vehicle occupant in a backward direction in a second time period before the collision to a speed below the traveling speed of the vehicle during the collision with the obstruction.

17. The method according to claim 16, wherein the act of accelerating the vehicle occupant in a forward direction is carried out via a gas bag arranged at least partially behind the vehicle occupant.

18. The method according to claim 17, wherein the act of accelerating the vehicle occupant in a backward direction is carried out by at least one of a belt system and a gas bag provided at least partially in front of the vehicle occupant.