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Electronic power assisted steering system and method

  • US 6,647,330 B1
  • Filed: 04/30/2002
  • Issued: 11/11/2003
  • Est. Priority Date: 04/30/2002
  • Status: Expired due to Term
First Claim
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1. A method for controlling a vehicle electric power supply that provides power to an electronic power assisted steering system, the method comprising the steps of:

  • determining a position of a steering member;

    determining a rate of movement and a direction of movement for the steering member;

    determining if the steering member is moving toward an electrical power peak;

    determining the vehicle speed;

    calculating the derivative of the rate of movement for the steering member;

    calculating a first future point in time at which a particular electrical power increase is needed for the electronic power assisted steering system, if the steering member is moving toward the electrical power peak;

    calculating the amplitude of the particular power increase at the first future point in time, if the steering member is moving toward the electrical power peak; and

    adjusting the electric power supply to produce a power output that includes the particular power increase, at the first future point in time, if the steering member is moving toward the electrical power peak.

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