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US 4,927,350 AGranted
Combustion control
AssigneeUnited Technologies Corporation
InventorMartin E. Zabielski
Life of this patent
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Abstract
At various loads a fuel/air peak relationship is determined for the peak infrared radiation. A desired operating fuel/air ratio is determined as is the offset between the relationship and the ratio. Later recalibration of the control system is established by determining a new fuel/air peak relationship and applying the offset.
Claims8
In a combustion process which is regulated by maintaining a preselected feed forward relationship of fuel input and air input, the improved method of operating comprising:
- establishing a fuel/air input peak relationship for the approximately stoichiometric condition which produces the maximum infrared radiation;
- selecting a desired operating fuel/air ratio based on a result of the fuel/air input other than infrared radiation;
- determining the desired fuel/air input relationship for said desired operating fuel/air ratio;
- determining a fuel/air relationship offset between the fuel/air input peak relationship and the fuel/air input desired relationship;
- operating the combustion process based on a feed forward signal representing the desired fuel/air input relationship;
- recalibrating the process by later establishing a new fuel/air input relationship for the approximately stoichiometric condition which produces the maximum infrared radiation;
- establishing a new desired fuel/air relationship by applying said fuel/air relationship offset to the new fuel/air input peak relationship;
- operating the combustion process at the new desired fuel/air relationship.
5 more elements
Dependencies are inferred from the claim text.