Vehicle Door Comprising a Deceleration Function

• US 20090007489A1
• Filed: 12/07/2005
• Published: 01/08/2009
• Est. Priority Date: 12/22/2004
• Status: Abandoned Application

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Seiler, Bernd, Maas, Juergen, Kern, Simon
• Application Number:
  US11/793,525
• Publication Number:
  US 20090007489A1
• Time in Patent Office: Days
• US Class Current: 49/31
• CPC Class Codes: E05B 2047/0033 using electro-rheological or magneto-rheological substances
• CPC Class Codes: E05C 17/006 with means for detecting obstacles outside the doors
• CPC Class Codes: E05C 17/30 of extensible, e.g. telescopic, construction flexible members E05C17/36 ; locking of telescopic systems in general F16B7/10; lockable telescopic gas springs F16F9/0254
• CPC Class Codes: E05F 15/43 responsive to disruption of energy beams, e.g. light or sound
• CPC Class Codes: E05F 2015/483 for detection during opening
• CPC Class Codes: E05F 5/025 specially adapted for vehicle doors
• CPC Class Codes: E05Y 2201/21 Brakes
• CPC Class Codes: E05Y 2201/25 Force or torque adjustment therefore E05Y2400/21 takes precedence
• CPC Class Codes: E05Y 2201/254 Fluid or viscous friction
• CPC Class Codes: E05Y 2400/532 Emergency braking
• CPC Class Codes: E05Y 2900/531 Doors

Abstract

The invention relates to a vehicle door comprising a braking function before a detected obstacle (3) and for damping the final position, which decelerates the movement of the vehicle door (2) by applying a braking torque, wherein an evaluation and control unit (7) determines the braking torque by evaluating an instantaneous door movement, which is sensed by a sensor system (6), or a sensed obstacle and actuates the damper (5) correspondingly. According to the invention, the braking function decelerates the vehicle door (2) aperiodically taking into account interference torques, wherein the evaluation and control unit (7) determines the braking torque for the braking function, in that during an opening process the vehicle door (2) reaches a target position with a speed with the value zero, and during a closing process reaches an end position (φ₀) with a predefined target speed, wherein the target position corresponds to a predefined maximum opening angle (φ_max) or a virtual stop which is determined by an obstacle (3) which is detected by the sensor system.

Claims

1-8. -8. (canceled)

9. A vehicle door having a braking function relative to a detected obstacle and for damping movement into a final position, which decelerates the movement of the vehicle door by applying a braking torque, comprising:

a sensor system that senses an instantaneous door movement,

a damper, and

an evaluation and control unit that determines the braking torque by evaluating the instantaneous door movement, which is sensed by the sensor system or as a function of the detected obstacle detected by the sensor system, and actuates the damper correspondingly,

wherein the braking function decelerates the vehicle door aperiodically taking into account interference torques,

wherein the evaluation and control unit determines the braking torque for the braking function,

wherein, during an opening process, the vehicle door reaches a target position with a speed with the value zero, and, during a closing process, reaches an end position with a predefined target speed, and

wherein the target position corresponds to a predefined maximum opening angle or a virtual stop which is determined by the obstacle detected by the sensor system.

10. The vehicle door as claimed in claim 9, wherein the evaluation and control unit starts the braking function when a remaining braking distance drops below a calculated braking distance.

11. The vehicle door as claimed in claim 9, wherein the virtual stop generates haptic feedback about a risk of a collision of the vehicle door with the obstacle.

12. The vehicle door as claimed in claim 9, wherein an observer circuit estimates the interference torques comprising torques caused by wind or gravity that are to be taken into account.

13. The vehicle door as claimed in claim 12, wherein the observer circuit estimates an angular acceleration from measured door opening angle sensor signals and adjusts it with a real acceleration.

14. The vehicle door as claimed in claim 9, wherein the evaluation and control unit determines the required braking distance as a function of a desired braking torque according to the equation:

15. The vehicle door as claimed in claim 9, wherein the evaluation and control unit determines the braking torque as a function of the remaining braking distance, the speed of the door and the moment of mass inertia according to the equation:

16. The vehicle door as claimed in claim 14, wherein the evaluation and control unit carries out the braking function during an opening process or a closing process for the smallest possible braking range, and wherein the braking range for the opening process is defined by (φ

_stop−

φ

_Brems)≦

φ

≦

φ

_stop and for the closing process is defined by φ

_stop≦

φ

≦

(φ

_stop+Δ

φ

_Brems).

17. The vehicle door as claimed in claim 15, wherein the evaluation and control unit carries out the braking function during an opening process or a closing process for the smallest possible braking range, and wherein the braking range for the opening process is defined by (φ

_stop−

φ

_Brems)≦

φ

≦

φ

_stop and for the closing process is defined by φ

_stop≦

φ

≦

(φ

_stop+Δ

φ

_Brems).

18. The vehicle door as claimed in claim 10, wherein the virtual stop generates haptic feedback about a risk of a collision of the vehicle door with the obstacle.

19. The vehicle door as claimed in claim 10, wherein an observer circuit estimates the interference torques comprising torques caused by wind or gravity that are to be taken into account.

20. The vehicle door as claimed in claim 11, wherein an observer circuit estimates the interference torques comprising torques caused by wind or gravity that are to be taken into account.

21. The vehicle door as claimed in claim 19, wherein the observer circuit estimates an angular acceleration from measured door opening angle sensor signals and adjusts it with a real acceleration.

22. The vehicle door as claimed in claim 20, wherein the observer circuit estimates an angular acceleration from measured door opening angle sensor signals and adjusts it with a real acceleration.

23. The vehicle door as claimed in claim 10, wherein the evaluation and control unit determines the required braking distance as a function of a desired braking torque according to the equation:

24. The vehicle door as claimed in claim 11, wherein the evaluation and control unit determines the required braking distance as a function of a desired braking torque according to the equation:

25. The vehicle door as claimed in claim 12, wherein the evaluation and control unit determines the required braking distance as a function of a desired braking torque according to the equation:

26. The vehicle door as claimed in claim 10, wherein the evaluation and control unit determines the braking torque as a function of the remaining braking distance, the speed of the door and the moment of mass inertia according to the equation:

27. The vehicle door as claimed in claim 11, wherein the evaluation and control unit determines the braking torque as a function of the remaining braking distance, the speed of the door and the moment of mass inertia according to the equation:

28. The vehicle door as claimed in claim 12, wherein the evaluation and control unit determines the braking torque as a function of the remaining braking distance, the speed of the door and the moment of mass inertia according to the equation: