Method and apparatus for controlling stationary gaseous-fueled internal combustion engines
First Claim
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1. A method of controlling a stationary gaseous-fueled internal combustion engine, comprising:
- measuring an air to fuel ratio of the engine;
calculating a difference between the measured air to fuel ratio and a desired air to fuel ratio for the engine; and
automatically controlling an air to fuel mixture supplied to the engine in accordance with the calculated difference to enable the engine to run at substantially the desired air to fuel ratio,wherein measuring the air to fuel ratio utilizes a wideband oxygen sensor,wherein measuring the air to fuel ratio includes utilizing a wideband oxygen sensor interface electrically connected to the wideband oxygen sensor,wherein the wideband oxygen sensor interface provides an output voltage proportional to the measured air to fuel ratio according to the following equation;
measured air to fuel ratio=(2*output voltage)+10.
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Abstract
A method and system is disclosed which relates to controlling a stationary gaseous-fueled internal combustion engine. The method may include measuring an air to fuel ratio of the engine, calculating a difference between the measured air to fuel ratio and a desired air to fuel ratio for the engine, and automatically controlling an air to fuel mixture supplied to the engine in accordance with the calculated difference to enable the engine to run at substantially the desired air to fuel ratio.
31 Citations
18 Claims
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1. A method of controlling a stationary gaseous-fueled internal combustion engine, comprising:
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measuring an air to fuel ratio of the engine; calculating a difference between the measured air to fuel ratio and a desired air to fuel ratio for the engine; and automatically controlling an air to fuel mixture supplied to the engine in accordance with the calculated difference to enable the engine to run at substantially the desired air to fuel ratio, wherein measuring the air to fuel ratio utilizes a wideband oxygen sensor, wherein measuring the air to fuel ratio includes utilizing a wideband oxygen sensor interface electrically connected to the wideband oxygen sensor, wherein the wideband oxygen sensor interface provides an output voltage proportional to the measured air to fuel ratio according to the following equation;
measured air to fuel ratio=(2*output voltage)+10.
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2. A method of controlling a stationary gaseous-fueled internal combustion engine, comprising:
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measuring an air to fuel ratio of the engine; calculating a difference between the measured air to fuel ratio and a desired air to fuel ratio for the engine; and automatically controlling an air to fuel mixture supplied to the engine in accordance with the calculated difference to enable the engine to run at substantially the desired air to fuel ratio, wherein automatically controlling the air to fuel mixture includes comparing the difference with at least one threshold band, wherein the at least one threshold band includes a first threshold band, a second threshold band, and a third threshold band. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling a stationary gaseous-fueled internal combustion engine, comprising:
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measuring an air to fuel ratio of the engine; calculating a lambda value using the measured air to fuel ratio; calculating a difference between the calculated lambda value and a lambda set point for the engine; and automatically controlling an air to fuel mixture supplied to the engine in accordance with the calculated difference to enable the engine to run at substantially the desired air to fuel ratio, wherein measuring the air to fuel ratio utilizes a wideband oxygen sensor, wherein measuring the air to fuel ratio includes utilizing a wideband oxygen sensor interface electrically connected to the wideband oxygen sensor, wherein the wideband oxygen sensor interface provides an output voltage proportional to the measured air to fuel ratio according to the following equation;
measured air to fuel ratio=(2*output voltage)+10.
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11. A method of controlling a stationary gaseous-fueled internal combustion engine, comprising:
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measuring an air to fuel ratio of the engine; calculating a lambda value using the measured air to fuel ratio; calculating a difference between the calculated lambda value and a lambda set point for the engine; and automatically controlling an air to fuel mixture supplied to the engine in accordance with the calculated difference to enable the engine to run at substantially the desired air to fuel ratio, wherein automatically controlling the air to fuel mixture includes comparing the difference with at least one threshold band, wherein the at least one threshold band includes a first threshold band, a second threshold band, and a third threshold band. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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