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US 7,597,093 B2Granted
Humidity based control system for an internal combustion engine
AssigneeGM Global Technology Operations LLC
InventorsLynn A. Totten, Michael Wayne Leiferman, Paul R. Hozak, Jeffrey A. Sell
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Abstract
A humidity based control system for an internal combustion engine includes a calculation module and a calibration module. The calculation module determines a humidity of air used in a combustion process of the internal combustion engine. The control module selectively controls spark timing and exhaust dilution in the internal combustion engine based on the humidity.
Claims20
A humidity based control system for an internal combustion engine, comprising:
- a calculation module that determines a first humidity of air used in a combustion process of the internal combustion engine;
- and
- a calibration module that compares the fist humidity with a second humidity calculated during a previous cycle and that selectively controls spark timing of the internal combustion engine based on a comparison between said first humidity and said second humidity.
A method to calibrate an internal combustion engine, comprising:
- determining a first humidity of air used in a combustion process of the internal combustion engine;
- comparing said first humidity with a second humidity calculated during a previous cycle;
- and
- selectively controlling spark timing of said internal combustion engine based on a comparison between said first humidity and said second humidity.
1 more element
Dependencies are inferred from the claim text.