Method for controlling a marine internal combustion engine
First Claim
1. A method for controlling a marine internal combustion engine, the method being carried out by a control module and comprising:
- operating the engine according to an initial set of mapped parameter values that correspond to a combustion parameter, the initial set of mapped parameter values being configured to achieve a first target fuel-air equivalence ratio in a combustion chamber of the engine;
determining a first actual fuel-air equivalence ratio in the combustion chamber;
using a feedback controller to minimize a difference between the first target fuel-air equivalence ratio and the first actual fuel-air equivalence ratio;
using outputs of the feedback controller to populate an initial set of adapt values by which to adjust combustion parameter values determined from the initial set of mapped parameter values;
transitioning to operating the engine according to a subsequent set of mapped parameter values that correspond to the combustion parameter, the subsequent set of mapped parameter values being configured to achieve a second, different target fuel-air equivalence ratio in the combustion chamber; and
after the step of transitioning, determining a second actual fuel-air equivalence ratio in the combustion chamber, using the feedback controller to minimize a difference between the second target fuel-air equivalence ratio and the second actual fuel-air equivalence ratio, and using the outputs of the feedback controller to populate a subsequent set of adapt values by which to adjust combustion parameter values determined from the subsequent set of mapped parameter values.
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Accused Products
Abstract
Controlling a marine engine includes operating the engine according to an initial set of mapped parameter values to achieve a first target fuel-air equivalence ratio, determining a first actual fuel-air equivalence ratio, and using a feedback controller to minimize a difference between the first target and actual ratios. Feedback controller outputs are used to populate an initial set of adapt values to adjust combustion parameter values from the initial set of mapped parameter values. The method includes transitioning to operating the engine according to a subsequent set of mapped parameter values to achieve a different target fuel-air equivalence ratio. The method includes determining a second actual fuel-air equivalence ratio, using the feedback controller to minimize a difference between the second target and actual ratios, and using feedback controller outputs to populate a subsequent set of adapt values to adjust combustion parameter values from the subsequent set of mapped parameter values.
16 Citations
20 Claims
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1. A method for controlling a marine internal combustion engine, the method being carried out by a control module and comprising:
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operating the engine according to an initial set of mapped parameter values that correspond to a combustion parameter, the initial set of mapped parameter values being configured to achieve a first target fuel-air equivalence ratio in a combustion chamber of the engine; determining a first actual fuel-air equivalence ratio in the combustion chamber; using a feedback controller to minimize a difference between the first target fuel-air equivalence ratio and the first actual fuel-air equivalence ratio; using outputs of the feedback controller to populate an initial set of adapt values by which to adjust combustion parameter values determined from the initial set of mapped parameter values; transitioning to operating the engine according to a subsequent set of mapped parameter values that correspond to the combustion parameter, the subsequent set of mapped parameter values being configured to achieve a second, different target fuel-air equivalence ratio in the combustion chamber; and after the step of transitioning, determining a second actual fuel-air equivalence ratio in the combustion chamber, using the feedback controller to minimize a difference between the second target fuel-air equivalence ratio and the second actual fuel-air equivalence ratio, and using the outputs of the feedback controller to populate a subsequent set of adapt values by which to adjust combustion parameter values determined from the subsequent set of mapped parameter values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling a marine internal combustion engine, the method being carried out by a control module and comprising:
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operating the engine according to an initial set of mapped fuel quantity values, the initial set of mapped fuel quantity values being configured to achieve a first target fuel-air equivalence ratio in a combustion chamber of the engine; determining a first actual fuel-air equivalence ratio in the combustion chamber; using a feedback controller to minimize a difference between the first target fuel-air equivalence ratio and the first actual fuel-air equivalence ratio; using outputs of the feedback controller to populate an initial set of fuel trim values by which to adjust fuel quantity values determined from the initial set of mapped fuel quantity values; transitioning to operating the engine according to a subsequent set of mapped fuel quantity values, the subsequent set of mapped fuel quantity values being configured to achieve a second, different target fuel-air equivalence ratio in the combustion chamber; and after the step of transitioning, determining a second actual fuel-air equivalence ratio in the combustion chamber, using the feedback controller to minimize a difference between the second target fuel-air equivalence ratio and the second actual fuel-air equivalence ratio, and using the outputs of the feedback controller to populate a subsequent set of fuel trim values by which to adjust fuel quantity values determined from the subsequent set of mapped fuel quantity values. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification