Oil degradation warning system
First Claim
1. An oil degradation warning system for a motor vehicle, comprising:
- first means for detecting respective values of degradation factors of oil, said degradation factors being closely related to the operation history of the motor vehicle;
second means for adding the detected values by using a predetermined calculation formula and integrating the added values with passage of time;
third means for issuing a warning signal when the integrated value exceeds a predetermined limit; and
fourth means which, when oil replenishment is carried out, postpones the issue of the warning signal by a period corresponding to the ratio of the replenished oil to the entire amount of the oil.
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Accused Products
Abstract
Disclosed herein is an oil degradation warning system of a motor vehicle, which can issue a warning at the time when the oil change is really needed. The system comprises first means for detecting respective values of degradation factors of oil, the degradation factors being closely related to the operation history of the motor vehicle, second means for adding the values by using a predetermined calculation formula and integrating the added result with passage of time, third means for issuing a warning signal when the integrated result exceeds a predetermined limit, and fourth means which, when oil replenishment is carried out, postpones the issue of the warning signal in accordance with the amount of the replenished oil.
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Citations
14 Claims
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1. An oil degradation warning system for a motor vehicle, comprising:
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first means for detecting respective values of degradation factors of oil, said degradation factors being closely related to the operation history of the motor vehicle; second means for adding the detected values by using a predetermined calculation formula and integrating the added values with passage of time; third means for issuing a warning signal when the integrated value exceeds a predetermined limit; and fourth means which, when oil replenishment is carried out, postpones the issue of the warning signal by a period corresponding to the ratio of the replenished oil to the entire amount of the oil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification