METHOD FOR AUTOMATICALLY DETERMINING ENGINE OIL CHANGE FREQUENCY BASED ON FUEL INJECTED
First Claim
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1. ) A method for automatically determining an engine oil change frequency at an engine control unit, the method comprising the steps of:
- determining an amount of fuel used per oil change;
calculating an amount of fuel remaining from the fuel used per oil change;
comparing the amount of fuel remaining to a predetermined amount of fuel remaining;
actuating an oil change indicator if the fuel remaining is less than the predetermined amount of fuel.
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Abstract
A method for automatically determining an engine oil change frequency at an engine control unit includes the steps of determining an amount of fuel used per oil change, and calculating an amount of fuel remaining from the fuel used per oil change. The method also includes the steps of comparing the amount of fuel remaining to a predetermined amount of fuel remaining, and actuating an oil change indicator if the fuel remaining is less than the predetermined amount of fuel.
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Citations
20 Claims
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1. ) A method for automatically determining an engine oil change frequency at an engine control unit, the method comprising the steps of:
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determining an amount of fuel used per oil change; calculating an amount of fuel remaining from the fuel used per oil change; comparing the amount of fuel remaining to a predetermined amount of fuel remaining; actuating an oil change indicator if the fuel remaining is less than the predetermined amount of fuel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. ) A method for automatically determining an engine oil change frequency, the method comprising the steps of:
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calculating a fuel rate; modifying the fuel rate based on an oil pressure, an oil temperature, an ambient temperature, a coolant temperature and a number of key cycles since the last oil change; determining an amount of fuel per oil change; determining a time since the last oil change; calculating an amount of fuel remaining from the modified fuel rate, the fuel per oil change, and the time since the last oil change; comparing the amount of fuel remaining to a predetermined amount of fuel remaining, where the predetermined amount of fuel remaining is an amount of fuel per oil change times a safety factor; actuating an oil change indicator if the fuel remaining is less than the predetermined amount of fuel. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. ) A method for automatically determining an engine oil change frequency, the method comprising the steps of:
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calculating a fuel rate; calculating a modified fuel rate by multiplying the fuel rate times the sum of a plurality of penalties, wherein the penalties comprise at least one of an ambient temperature penalty, a number of key cycles penalty, a coolant temperature penalty, an oil pressure penalty and an oil temperature penalty; calculating an amount of fuel remaining from the modified fuel rate; comparing the amount of fuel remaining to a predetermined amount of fuel remaining; actuating an oil change indicator if the fuel remaining is less than the predetermined amount of fuel. - View Dependent Claims (19, 20)
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Specification