| 摘要 |
A method of evaluating engine oil wear on the basis of viscosity measurement, taking into account the addition of fresh oil is described. First, using the oil viscosity sensor, the amount of oil added in the addition of fresh oil is detected, then the oil viscosity sensor determines the viscosity of the oil mixture (eta2) of the engine oil and fresh oil; the quantity (Vn) of fresh oil added is determined in the electronic analyzer from the difference between the old oil level, i.e., the oil volume (V1), and the new oil level, i.e., oil volume (V2); and the viscosity (etan) of the fresh oil is determined from the viscosity (eta1) of the old engine oil immediately before the point in time of the addition of fresh oil and from the viscosity (eta2) after the addition; and a hypothetical initial viscosity (eta'0) is calculated as a new corrected reference value from the known value of the viscosity (eta0) of the old engine oil in the new condition, the quantity (V1) of the engine oil still present at the point in time of the addition, the calculated viscosity (etan) of the fresh oil and the calculated quantity (Vn) of the fresh oil.
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