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Method and device for increasing the precision of the position determination of a motor-driven closure element of a vehicle

  • US 8,412,403 B2
  • Filed: 09/01/2008
  • Issued: 04/02/2013
  • Est. Priority Date: 10/19/2007
  • Status: Active Grant
First Claim
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1. A computer-implemented method for increasing the precision of the position determination of a motor-driven closure element of a vehicle, comprising the following steps:

  • determination and storage of data which corresponds to a force-displacement reference curve representative of a force applied to the motor-driven closure element;

    determination and storage of data which corresponds to a force-displacement actual-value curve representative of a force applied to the motor-driven closure element during vehicle operation;

    calculation by an evaluator of a correlation function based on the force-displacement curve and the force-displacement actual-value curve using the data which corresponds to the force-displacement reference curve, and the data which corresponds to the force-displacement actual-value curve;

    determination by the evaluator of a maximum value of the correlation function; and

    correction of a counter status of a position counter by the evaluator in order to correct a counting error, using a position offset value associated with the determined maximum;

    wherein the determination and storage of the data which corresponds to the force-displacement reference curve is carried out during the production of the vehicle;

    wherein the determination and storage of the data which corresponds to the force-displacement actual-value curve is carried out after each movement of the closure element during the operation of the vehicle.

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