Physics-based oil temperature model
AssigneeGM Global Technology Operations LLC
InventorsChad W. Lehner, Balaji Maniam, Gary D. Mandrusiak, David A. Smyczynski, Craig Lash
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Abstract
A system includes an input and a thermal data processing module. The input receives a first oil temperature of an engine oil when an engine is turned on. The thermal data processing module estimates a first heat transfer from a piston of the engine to the engine oil. The thermal data processing module estimates a second heat transfer from the engine oil to an engine block of the engine. The thermal data processing module determines a second oil temperature of the engine oil based on the first oil temperature and the first and second heat transfers.
Claims18
A system comprising:
- an input that receives a first oil temperature of an engine oil when an engine is turned on;
- and
- a thermal data processing module that estimates a first heat transfer from a piston of said engine to said engine oil, that estimates a second heat transfer from said engine oil to an engine block of said engine, and that determines a second oil temperature of said engine oil based on said first oil temperature and said first and second heat transfers,
- wherein said thermal data processing module estimates:
- a heat transfer rate from combustion gases to said piston based on heat transfer coefficients of said combustion gases and said piston;
- and
- said first and second heat transfers based on said heat transfer rate.
A system comprising:
- an input that receives a first oil temperature of an engine oil when an engine is turned on;
- and
- a thermal data processing module that estimates a first heat transfer from a piston of said engine to said engine oil, that estimates a second heat transfer from said engine oil to an engine block of said engine, and that determines a second oil temperature of said engine oil based on said first oil temperature and said first and second heat transfers,
- wherein said thermal data processing module estimates:
- a rate of circulation of said engine oil in an oil pan of said engine based on at least one of a viscosity of said engine oil and a difference between temperatures of said engine oil in upper and lower sections of said oil pan;
- and
- said first and second heat transfers based on said rate.
A method comprising:
- receiving a first oil temperature of an engine oil when an engine is turned on;
- estimating a first heat transfer from a piston of said engine to said engine oil;
- estimating a second heat transfer from said engine oil to an engine block of said engine;
- determining a rate of circulation of said engine oil in an oil pan of said engine based on at least one of a viscosity of said engine oil and a difference between temperatures of said engine oil in upper and lower sections of said oil pan;
- estimating said first and second heat transfers based on said rate;
- and
- determining a second oil temperature of said engine oil based on said first oil temperature and said first and second heat transfers.
A method comprising:
- receiving a first oil temperature of an engine oil when an engine is turned on;
- estimating a first heat transfer from a piston of said engine to said engine oil;
- estimating a second heat transfer from said engine oil to an engine block of said engine;
- estimating a heat transfer rate from combustion gases to said piston based on heat transfer coefficients of said combustion gases and said piston;
- estimating said first and second heat transfers by estimating said heat transfer rate;
- and
- determining a second oil temperature of said engine oil based on said first oil temperature and said first and second heat transfers.
Dependencies are inferred from the claim text.