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Method for controlling an electric belt retractor, and an electric belt retractor

  • US 8,091,821 B2
  • Filed: 04/11/2006
  • Issued: 01/10/2012
  • Est. Priority Date: 04/14/2005
  • Status: Active Grant
First Claim
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1. A method for controlling an electric belt retractor, the belt retractor having an electric motor, which can drive a belt spool in a belt band retraction direction and/or in a belt band withdrawal direction, and a blocking catch which is able to be guided into blocking teeth in order to block a rotation of the belt spool in the belt band withdrawal direction, the method comprising the following steps:

  • (i) Operating the electric motor in the belt band retraction direction to tension a belt band;

    (ii) Detecting a possible belt band withdrawal following the tensioning of the belt band;

    (iii) Determining a stable vehicle state; and

    (iv) Performing an unlocking operation of the electric motor in order to release a blocking catch only when a belt band withdrawal is detected after the tensioning of the belt band, the step of performing the unlocking operation including re-operating the electric motor in the belt band retraction direction.

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