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Noncontacting position sensor for an automotive steering system

  • US 4,924,696 A
  • Filed: 07/24/1989
  • Issued: 05/15/1990
  • Est. Priority Date: 07/24/1989
  • Status: Expired due to Fees
First Claim
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1. In a motor vehicle steering system in which steering is achieved via linear displacement of a rack mechanism with respect to a housing member along a longitudinal axis, apparatus for detecting the position of the rack mechanism as a measure of the steering angle, comprising:

  • sensor means including first and second magnetoresistor elements secured to said housing member in proximity the rack mechanism on an axis transverse to said longitudinal axis;

    means defining a surface feature on the rack mechanism adjacent said magnetoresistor elements and on an axis diagonal to said longitudinal axis for the rack mechanism and the sensor means in relation to the displacement of said rack mechanism; and

    means for developing an indication of rack position in relation to the consequent differential resistances of said magnetoresistor elements.

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