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Oil supply system in an internal combustion engine for a vehicle

  • US 5,159,313 A
  • Filed: 06/05/1990
  • Issued: 10/27/1992
  • Est. Priority Date: 06/19/1989
  • Status: Expired due to Fees
First Claim
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1. A system for supplying a lubrication oil in an internal combustion engine, comprising:

  • an oil pan mounted to the bottom of the internal combustion engine and storing an amount of lubrication oil therein;

    first sensor means for detecting a level of oil stored in the oil pan;

    second sensor means for detecting temperature parameters of the internal combustion engine;

    means for storing the value of a temperature detected by the second sensor means when operation of the engine is terminated, said storing means storing the temperature until operation of the engine is resumed;

    means for determining a recovered state of the oil in the oil pan, based on the difference between the temperature stored in the storing means and a temperature as detected by the second sensor means when the engine is started and a correlation between the temperature difference and an amount of oil recovered in the oil pan; and

    oil supplementing means for supplementing oil in the oil pan when the oil level in the oil pan sensed by the first sensor means is lower than a predetermined value, after the oil in the oil pan has been fully recovered, as determined by the determining means.

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