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Method for the recognition of oil top-up quantities

  • US 6,009,361 A
  • Filed: 08/18/1997
  • Issued: 12/28/1999
  • Est. Priority Date: 08/17/1996
  • Status: Expired due to Fees
First Claim
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1. A method for recognizing oil top-up quantities in an engine, the method comprising the steps of:

  • a) recording a multiplicity of oil levels under specific operating conditions over time;

    b) calculating an oil-mass average value Xz of the oil top-up quantity over z instantaneous measurements xmom in each case;

    c) calculating a compensating function, describing a variation in an oil mass xh over time, using a specific number of hourly oil masses xh;

    d) calculating a difference value DFA from an end point xlang of said compensating function and from a penultimate oil-mass average value according to a function (DFA=xlang-XzN-1), with XzN-1 being an oil mass penultimately obtained by rolling averaging from z instantaneous oil masses xmom;

    e) activating a discrimination function for checking whether said difference value DFA is greater than a first oil-mass limit value M1; and

    if so, a first case is recognized and a processing function for calculating the oil top-up quantity in the first case is started; and

    if not, a further discrimination function is activated, for checking whether the difference value DFA is greater than a second oil-mass limit value M2 and for checking if there is a specific communication signal between the vehicle and driver such that if a result of the check is that the difference value DFA is greater than the second oil-mass limit value M2 and there is a specific communication signal between the vehicle and driver, a second case is recognized and the processing function for calculating the oil top-up quantity in the second case is started, and if the result is negative, a processing function for calculating the oil top-up quantity in a normal case is activated.

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