Method for designing an engine component temperature estimator
AssigneeGM Global Technology Operations LLC
InventorsDimitrios Rizoulis, Gary Mandrusiak, Chandran Santanam
Life of this patent
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Abstract
A method of estimating temperature in an engine including estimating metal temperatures at each of a plurality of nodes and estimating a coolant temperature. The method further includes detecting a measured coolant temperature and determining a gain based on a difference between the estimated coolant temperature and the measured coolant temperature. The method adjusts the metal temperatures at each of the plurality of nodes based on the gain. The method estimates the metal temperatures of engine components without temperature sensors.
Claims20
A method comprising:
- estimating metal temperatures at each of a plurality of nodes in an engine;
- estimating a coolant temperature;
- detecting a measured coolant temperature;
- determining a gain based on a difference between said estimated coolant temperature and said measured coolant temperature;
- and
- adjusting said estimated metal temperatures at each of said plurality of nodes based on said gain.
A method of designing an engine component temperature estimator, comprising:
- defining a plurality of nodes at a plurality of engine locations;
- determining thermal information at each of said nodes;
- creating a detailed thermal model of the engine based on said plurality of nodes and said thermal information;
- combining said plurality of nodes into a plurality of nodal lumps, wherein each nodal lump includes said nodes from each of said engine locations;
- creating a simplified thermal model of the engine based on said detailed thermal model and said plurality of nodal lumps;
- estimating metal and coolant temperatures including an estimated coolant temperature based on said simplified thermal model;
- comparing said estimated coolant temperature to a measured coolant temperature;
- and
- adjusting said estimated metal and coolant temperatures based on said comparison.
A control system for a cooling system of a vehicle comprising:
- a temperature estimator module that estimates metal and coolant temperatures at a plurality of engine locations based on a measured actual coolant temperature and a gain;
- a comparing module that generates a comparison signal based on said actual coolant temperature and an estimated coolant temperature;
- a gain adjustment module that adjusts said gain based on said comparison signal.
Dependencies are inferred from the claim text.