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Transmission oil monitor system

  • US 5,559,494 A
  • Filed: 12/18/1992
  • Issued: 09/24/1996
  • Est. Priority Date: 12/18/1992
  • Status: Expired due to Term
First Claim
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1. Apparatus for monitoring the condition of oil in a transmission, comprising:

  • first means connected to the transmission for sensing an actual number of revolutions of the transmission during transmission operation;

    second means connected to the transmission for sensing the temperature of the oil during said operation;

    third means connected to said first and second means generating an effective number of transmission revolutions during said operation, said effective number comprising said actual number weighted as a function of said temperature, said effective number being derived from said actual number as a linear function of said temperature of said oil, said function establishing a penalty factor multiplier which increases with increasing temperature, said effective number being said actual number multiplied by said penalty factor; and

    fourth means connected to said third means for totalling said effective number of revolutions over a course of transmission operations and producing an indicia that servicing of the oil is required when said total of said effective number of revolutions exceeds a particular level.

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