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Steer-by-wire apparatus and system having angle sensor fallback

  • US 6,755,276 B2
  • Filed: 09/04/2001
  • Issued: 06/29/2004
  • Est. Priority Date: 09/20/2000
  • Status: Expired due to Term
First Claim
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1. A power-assisted steering system for a non-trackborne vehicle having wheels, said system comprising:

  • a steering-control operated by a driver;

    a wheel-angle positioner to steer the wheels;

    a steering-control angle-sensor to provide a determination of the angle to which the steering-control is turned;

    at least one wheel-angle sensor to sense the position of the wheels;

    a feel provider to generate a feel torque to simulate a feedback of force to the steering control, the feel provider having an electric motor;

    a feel provider control-unit for controlling the feel provider; and

    , at least one steering control-unit, responsive to the determination of the angle to which the steering control is turned as provided by the steering-control angle-sensor, for controlling the wheel-angle positioner; and

    , wherein, in the event of failure of the steering-control angle-sensor, the determination of the angle to which the steering-control is turned is then continuously obtained solely from a voltage induced in the feel provider electric motor by turning the steering-control manually, and said determination of steering-control angle obtained from the feel-provider electric motor is used by said at least one steering control-unit to control the wheel-angle positioner.

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