Adaptive engine control
First Claim
Patent Images
1. A system comprising:
- an engine;
an air/fuel regulator adapted to control at least one of an amount of air and an amount of fuel supplied to the engine;
a sensor adapted to sense a characteristic indicative of the engine'"'"'s power output; and
a controller coupled to the sensor and to the air/fuel regulator and adapted to;
signal the air/fuel regulator to control at least one of the amount of air and the amount of fuel supplied to the engine over a range of engine operation in response to a plurality of engine control set-points adapted to operate the engine within the range and a fuel parameter applicable evenly throughout the range, the fuel parameter being indicative of a composition of the fuel; and
adjust the fuel parameter as a function of the sensed characteristic indicative of the engine'"'"'s power output and an expected engine power output.
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Abstract
An engine system has an engine control module for controlling a ratio of air and fuel supplied to an engine. The engine control module controls the ratio of air and fuel in relation to a fuel parameter related to the specific energy of the fuel or the stoichiometry of the combustion reaction. The fuel parameter is updated in relation to the engine'"'"'s performance.
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Citations
41 Claims
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1. A system comprising:
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an engine;
an air/fuel regulator adapted to control at least one of an amount of air and an amount of fuel supplied to the engine;
a sensor adapted to sense a characteristic indicative of the engine'"'"'s power output; and
a controller coupled to the sensor and to the air/fuel regulator and adapted to;
signal the air/fuel regulator to control at least one of the amount of air and the amount of fuel supplied to the engine over a range of engine operation in response to a plurality of engine control set-points adapted to operate the engine within the range and a fuel parameter applicable evenly throughout the range, the fuel parameter being indicative of a composition of the fuel; and
adjust the fuel parameter as a function of the sensed characteristic indicative of the engine'"'"'s power output and an expected engine power output. - View Dependent Claims (2, 3, 5, 6, 8, 9, 10, 11, 12, 13)
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4. A system comprising:
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an engine;
an air/fuel regulator adapted to control at least one of an amount of air and an amount of fuel supplied to the engine;
a sensor adapted to sense a characteristic indicative of a lambda of a mixture combusted by the engine; and
a controller coupled to the sensor and to the air/fuel regulator and adapted to;
receive a fuel definition input and determine a fuel parameter from the fuel definition input;
signal the air/fuel regulator to control at least one of the amount of air and the amount of fuel supplied to the engine over a range of engine operation in response to a plurality of engine control set-points adapted to operate the engine within the range and the fuel parameter applicable evenly throughout the range, the fuel parameter being indicative of a composition of the fuel;
adjust the fuel parameter as a function of the characteristic indicative of the lambda of the mixture combusted by the engine.
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7. (canceled)
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14. A method for controlling an engine system comprising:
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adjusting an air/fuel mixture supplied to the engine over a range of engine operating conditions as a function of a plurality of engine set-points adapted to operate the engine within the range and a fuel parameter applicable evenly throughout the range, the fuel parameter indicative of a composition of the fuel;
receiving a signal that is indicative of the engine'"'"'s power output; and
adjusting the fuel parameter as a function of the signal indicative of the engine'"'"'s power output and an expected engine power output. - View Dependent Claims (15, 16, 18, 19, 20, 22, 23, 24, 25, 26, 27)
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17. (canceled)
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21. A method for controlling an engine system comprising:
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receiving a fuel definition;
initially determining a fuel parameter from the fuel definition;
adjusting an air/fuel mixture supplied to the engine over a range of engine operating conditions as a function of a plurality of engine set-points adapted to operate the engine within the range and the fuel parameter applicable evenly throughout the range, the fuel parameter indicative of a composition of the fuel;
receiving a signal that is indicative of a lambda of the mixture combusted by the engine;
adjusting the fuel parameter as a function of the signal indicative of the lambda of the mixture combusted by the engine.
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28. An article comprising a machine-readable medium storing instructions adapted to cause one or more machines to perform operations comprising:
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determining regulator control signals over a range of engine operation in relation to a plurality of engine set-points adapted to operate the engine within the range and a fuel parameter applicable evenly throughout the range, the regulator control signal adapted to signal a regulator to adjust an air/fuel mixture supplied to an engine, the fuel parameter indicative of a composition of a fuel supplied to the engine;
receiving a signal indicative of the engine'"'"'s power output; and
adjusting the fuel parameter in relation to the engine'"'"'s as a function of the signal indicative of the engine'"'"'s power output and an expected power output. - View Dependent Claims (29, 30, 32, 33, 34, 36, 37, 38, 39, 40, 41)
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31. (canceled)
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35. An article comprising a machine-readable medium storing instructions adapted to cause one or more machines to perform operations comprising:
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receiving a fuel definition;
initially determining a fuel parameter from the fuel definition; and
determining regulator control signals over a range of engine operation in relation to a plurality of engine set-points adapted to operate the engine within the range and a fuel parameter applicable evenly throughout the range, the regulator control signal adapted to signal a regulator to adjust an air/fuel mixture supplied to an engine, the fuel parameter indicative of a composition of a fuel supplied to the engine;
receiving a signal indicative of a lambda of a mixture combusted by the engine; and
adjusting the fuel parameter in relation to the signal indicative of the lambda of the mixture combusted by the engine.
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Specification