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Magnetoresistive turbocharger compressor wheel speed sensor

  • US 20050017709A1
  • Filed: 07/25/2003
  • Published: 01/27/2005
  • Est. Priority Date: 07/25/2003
  • Status: Abandoned Application
First Claim
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1. An apparatus comprising:

  • a non-ferromagnetic compressor wheel of a turbocharger, the non-ferromagnetic compressor wheel having fins;

    a permanent magnet positioned so as to induce eddy currents on the fins; and

    , at least one magnetoresistor positioned with respect to the non-ferromagnetic compressor wheel and the permanent magnet so as to be magnetically biased by the permanent magnet and so as to sense rotation of the non-ferromagnetic compressor wheel.

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