Method and system for enhanced engine control based on cylinder pressure
First Claim
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1. A method for controlling an engine operating in a hazardous environment, the engine having a cylinder, the method comprising:
- sensing cylinder pressure;
comparing the cylinder pressure to a pressure threshold;
adjusting an engine control parameter when the cylinder pressure exceeds the pressure threshold;
comparing the cylinder pressure to an additional pressure threshold, the additional pressure threshold based on an increase in pressure due to the presence of flammable gas in the engine operating environment; and
shutting down the engine when the cylinder pressure exceeds the additional pressure threshold.
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Abstract
A method for controlling an engine having a cylinder includes sensing cylinder pressure; comparing the cylinder pressure to a pressure threshold; and adjusting an engine control parameter when the cylinder pressure exceeds the pressure threshold. A system for controlling engine operation is also provided.
38 Citations
20 Claims
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1. A method for controlling an engine operating in a hazardous environment, the engine having a cylinder, the method comprising:
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sensing cylinder pressure;
comparing the cylinder pressure to a pressure threshold;
adjusting an engine control parameter when the cylinder pressure exceeds the pressure threshold;
comparing the cylinder pressure to an additional pressure threshold, the additional pressure threshold based on an increase in pressure due to the presence of flammable gas in the engine operating environment; and
shutting down the engine when the cylinder pressure exceeds the additional pressure threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for controlling engine operation in a hazardous environment, the system comprising:
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a cylinder pressure sensor for sensing cylinder pressure; and
a controller in communication with the cylinder pressure sensor, the controller including control logic for comparing the cylinder pressure to a pressure threshold, control logic for adjusting an engine control parameter when the cylinder pressure exceeds the pressure threshold, control logic for comparing the cylinder pressure to an additional pressure threshold, the additional pressure threshold based on an increase in pressure due to the presence of flammable gas in the engine operating environment, and control logic for generating an engine shutdown signal when the cylinder pressure exceeds the additional pressure threshold. - View Dependent Claims (9)
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10. A computer readable storage medium having information stored thereon representing instructions executable by an engine controller in communication with a cylinder pressure sensor and an engine, the engine controller controlling an engine in a hazardous environment, the computer readable storage medium comprising:
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instructions for determining cylinder pressure based on signals provided by the cylinder pressure sensor;
instructions for comparing the cylinder pressure to a pressure threshold;
instructions for adjusting an engine control parameter when the cylinder pressure exceeds the pressure threshold;
instructions for comparing the cylinder pressure to an additional pressure threshold, the additional pressure threshold based on an increase in cylinder pressure resulting from the presence of flammable gas entering the cylinder from the engine operating environment; and
instructions for shutting down the engine when the cylinder pressure exceeds the additional pressure threshold. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for controlling an engine operating in a hazardous environment, the engine having a cylinder, the method comprising:
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sensing cylinder pressure;
comparing the cylinder pressure to a pressure threshold, the pressure threshold based on an increase in operating cylinder pressure caused by the presence of flammable gas inhaled by the engine from the engine operating environment; and
adjusting an engine control parameter when the cylinder pressure exceeds the pressure threshold so as to shut down the engine. - View Dependent Claims (17, 18, 19)
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20. A system for controlling engine operation in a hazardous environment, the system comprising:
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at least one cylinder pressure sensor for sensing cylinder pressure;
at least one gas sensor for sensing the environment in which the engine operates; and
a controller in communication with the at least one cylinder pressure sensor and the at least one gas sensor, the controller including control logic for comparing the cylinder pressure to a pressure threshold, the pressure threshold based on a level of flammable gas sensed by the gas sensor and for generating an engine shutdown signal when the cylinder pressure exceeds the pressure threshold.
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Specification