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Position and/or angle control method and device without absolute positions sensor

  • US 6,217,478 B1
  • Filed: 07/09/1999
  • Issued: 04/17/2001
  • Est. Priority Date: 07/14/1998
  • Status: Expired due to Fees
First Claim
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1. A method for control of a positioning device of a motor vehicle without an absolute position sensor, the positioning device having a controllable part with at least one known position for maintaining the positioning device in a desired state, the method comprising the steps of:

  • initializing the positioning device after termination of operation of the motor vehicle by moving the positioning device precisely to the at least one known position;

    storing the at least one known position of the position device as a reference value via an electronic circuit; and

    maintaining the reference value even when an ignition of the motor vehicle is turned shut off so that the reference value can be used when starting the motor vehicle.

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