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System for monitoring the condition of tires

  • US 5,712,616 A
  • Filed: 07/09/1996
  • Issued: 01/27/1998
  • Est. Priority Date: 07/26/1995
  • Status: Expired due to Term
First Claim
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1. Apparatus for monitoring the condition of tires on the wheels of a motor vehicle, said apparatus comprisingmeans for detecting rotational movements of the wheels and generating values (Nvl, Nvr, Nhl, Nhr) as a function of respective rotational movements,evaluation means for forming quotients Q1, Q2, Q3 which represent three of said values divided by a common fourth one of said values, and for comparing said quotients with each other, and for generating a signal which represents the condition of the tires based on said comparison without any direct measurement of pneumatic pressure in any of said tires, anddisplay means for displaying the condition of said tires in response to said signal.

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