Adaptive oil pressure fault detection
AssigneeGM Global Technology Operations LLC
InventorsDavid R. Staley, Mike M. McDonald, William C. Albertson
Life of this patent
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Abstract
A method of monitoring pressure of oil that is implemented within an internal combustion engine includes determining an expected oil pressure value based on engine operating conditions and monitoring an actual oil pressure value based on a signal generated by an oil pressure sensor. A difference between the expected oil pressure value and the actual oil pressure value is calculated and is compared to a threshold difference. A diagnostic trouble code is generated when the difference exceeds the threshold difference.
Claims24
A method of monitoring pressure of oil that is implemented within an internal combustion engine, comprising:
- determining an expected oil pressure value based on engine operating conditions;
- monitoring an actual oil pressure value based on a signal generated by an oil pressure sensor;
- calculating a difference between said expected oil pressure value and said actual oil pressure value;
- comparing said difference to a threshold difference;
- and
- generating a diagnostic trouble code when said difference exceeds said threshold difference.
An adaptive oil pressure fault detection system that is implemented with an internal combustion engine, comprising:
- a first module that determines an expected oil pressure value based on engine operating conditions;
- a second module that monitors an actual oil pressure value based on a signal generated by an oil pressure sensor;
- a third module that calculates a difference between said expected oil pressure value and said actual oil pressure value;
- a fourth module that compares said difference to a threshold difference;
- and
- a fifth module that generates a diagnostic trouble code when said difference exceeds said threshold difference.
A method of monitoring pressure of oil that is implemented within an internal combustion engine, comprising:
- determining an expected oil pressure value based on an engine speed and an engine temperature;
- monitoring an actual oil pressure value based on a signal generated by an oil pressure sensor;
- calculating a difference between said expected oil pressure value and said actual oil pressure value;
- comparing said difference to a threshold difference;
- generating a diagnostic trouble code when said difference exceeds said threshold difference;
- and
- trimming said expected oil pressure value based on at least one of said difference and a parameter of the engine.
Dependencies are inferred from the claim text.