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Method for controlling a power sliding van door
| Details |
Inventors: Clark, Marian E.; Buchanan, Jr., Harry Charles; Jackson, Jr., James A.;
Assignee: Valeo Electrical Systems, Inc. (Auburn Hills, MI)
Primary Examiner: Strimbu; Gregory J.
Assistant Examiner:
Attorney, Agent or Firm: Lewis; J. Gordon
A power drive system is adapted for a sliding door mounted on at least one side of a vehicle for sliding movement forwardly and rearwardly of the vehicle. The system includes a reversible motor. A bracket is guided within a guide along a fixed path between the opened and closed positions of the door. An elongated drive member is slidably disposed within the guide and connected to the bracket at one end for driving the bracket along the fixed path. A translator mechanism operably engages with the drive member for powering movement of the door. The translator mechanism can include a rotatable hub, operably engageable with the drive member, a gear transmission for driving the hub, and a clutch mechanism for connecting the motor to the transmission. The translator mechanism preferably has sufficient power to pull the sliding door into a primary latch position with respect to the corresponding portions of a latch mechanism attached to the door and frame defining the door opening. A power striker moves the door into and out of sealing engagement with the frame. A lock mechanism selectively maintains the latch in a locked position. At least one sensor provides an input signal to a control system corresponding to movement of the door, position of the lock mechanism, and position of the power striker for controlling the door drive unit, power striker drive unit, and lock mechanism drive unit in accordance with a program stored in memory. |
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DETAILED DESCRIPTION It is desirable in the present invention to provide a power drive system for moving a movable closure along a fixed path between an open position and a closed position with respect to a portal defining a passage through a barrier, such that latch bolt operation and weather strip compression can be accomplished at the end of such movement without requiring high momentum during the closing movement.
It is also desirable in the present invention to provide a power drive for moving a closure with low momentum between its fully open position and fully closed position, such that the closure is moved into the primary latch position in a controlled manner without requiring additional mechanisms for engaging and moving the striker from the secondary latch position through the final portion of closing movement into the primary latch position.
It is also desirable to provide a smaller power drive package for installation in a vehicle.
Providing a power drive system that does not leave the drive member under load is desirable so that the drive member is not subjected to stretching forces over long periods of time and so that the need for slack take-up mechanisms is eliminated.
It is further desirable to provide a power drive system with high closing force and low momentum to move the latch mechanism into the primary position with the power drive motor.
The present invention provides for automatically closing sliding doors such that the controller and motor drive translates the door along the entire fixed path during opening and closing movement to carry the fork bolt or striker on the door through the secondary latch position to the primary latch position to ensure full door security and sealing.
The present invention physically pulls the door and connected striker or fork bolt into the corresponding fork bolt or striker connected to a frame defining the opening, through the secondary position and into the primary latch position, then initiates power striker motion to move the door into the weather strip seals surrounding the opening
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