Vehicle Door with a Variable Latching Function

• US 20080307711A1
• Filed: 12/07/2005
• Published: 12/18/2008
• 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:
  US11/793,538
• Publication Number:
  US 20080307711A1
• Time in Patent Office: Days
• US Class Current: 49/501
• CPC Class Codes: E05B 2047/0033 using electro-rheological or magneto-rheological substances
• CPC Class Codes: E05C 17/305 with hydraulic locks
• 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 5/00 Braking devices, e.g. checks; Stops; Buffers construction of pneumatic or liquid braking devices E05F3/00; braking devices, buffers or end stops on drawers for tables, cabinets or like furniture A47B88/473; combined with devices for holding wings open E05C17/00; devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing E05C17/04
• CPC Class Codes: E05Y 2201/68 Handles, cranks
• CPC Class Codes: E05Y 2400/532 Emergency braking
• CPC Class Codes: E05Y 2400/852 Sensors
• CPC Class Codes: E05Y 2400/86 by hand
• CPC Class Codes: E05Y 2900/531 Doors

Abstract

A vehicle door with a variable latching function which holds the vehicle door in a desired latched position by applying a latching torque using a controllable damper is described. An evaluation and control unit detects the desired latched positions by evaluating an instantaneous door movement sensed by a sensor system and actuates the damper using an actuator element. The evaluation and control unit releases the latched position after a corresponding activation is detected. The variable latching function acts on the vehicle door within a functional region which extends to a predefined opening region between a first opening angle and a maximum opening angle when the vehicle door drops below a predefined speed or comes to a standstill within the functional region.

Claims

1-11. -11. (canceled)

12. A vehicle door with a variable latching function which holds the vehicle door in a desired latched position;

comprising;

a controllable damper for applying a latching torque;

an evaluation and control unit for detecting a location of the desired latched position by evaluating an instantaneous door movement;

a sensor system for sensing the instantaneous door movement; and

an actuator element for activating the damper;

wherein the evaluation and control unit releases the door from the latched position after a corresponding activation is detected;

and the variable latching function acts on the vehicle door within a functional region extending substantially to a predefined opening region between a first opening angle and a maximum opening angle when the vehicle door has a speed below a predefined speed within the functional region.

13. The vehicle door as claimed in claim 12, wherein, in a wider region substantially extending to a predefined opening region between a minimum opening angle and the first opening angle, the vehicle door moves into an initial position defined by the minimum opening angle when the vehicle door is positioned within the wider region.

14. The vehicle door as claimed in claim 12, wherein the latching torque for holding the desired latched position is applicable and releasable in a timed fashion.

15. The vehicle door as claimed in claim 14, wherein the latching torque is applicable and releasable by at least one PT₂ element having a predefined time constant.

16. The vehicle door as claimed in claim 12, wherein the latching torque for holding the vehicle door in the latched position which corresponds to a region about a central latched position is settable as a function of an identified, current deviation from the central latched position.

17. The vehicle door as claimed in claim 12, wherein the evaluation and control unit detects the desired latched position when a user lets go of one of an internal door handle, external door handle and a door frame in response to a detected movement of the vehicle door.

18. The vehicle door as claimed in claim 12, wherein the evaluation and control unit detects the activation for releasing the latched position when a user grasps one of an internal door handle, external door handle, and the door frame.

19. The vehicle door as claimed in claim 17, when a corresponding sensor system monitors one of the internal door handle, external door handle, and the door frame for activation by the user.

20. The vehicle door as claimed in claim 12, wherein the evaluation and control unit detects the activation for releasing the latched position when a force-proportional deflection of the vehicle door about the central latched position is detected, and wherein the force at least overcomes rigidities inherent to one of the vehicle door, the damper and the attachments.

21. The vehicle door as claimed in claim 20, wherein the evaluation and control unit releases the latched position when the deflection of the vehicle door from the latched position reaches or exceeds a predefined threshold value.

22. The vehicle door as claimed in claim 20, wherein one of a pressure sensor and force sensor detects the force, and wherein the evaluation and control unit releases the latched position when the detected force reaches or exceeds a predefined threshold value.

23. The vehicle door as claimed in claim 12, wherein the variable latching function acts on the vehicle door when it is stationary in the functional region.

24. The vehicle door as claimed in claim 18, when a corresponding sensor system monitors one of the internal door handle, external door handle, and the door frame for activation by the user.