Method and associated device for sensing the air/fuel ratio of an internal combustion engine
First Claim
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1. A method for sensing an air/fuel ratio in a combustion chamber of an internal combustion engine, the method comprising:
- sensing a pressure in at least one cylinder of the internal combustion engine;
generating a pressure signal representative of the sensed pressure;
extracting characteristic parameters of the pressure signal; and
generating a signal representative of the air/fuel ratio of the internal combustion engine as a function of the characteristic parameters.
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Abstract
A method of sensing the air/fuel ratio in a combustion chamber of an internal combustion engine that may be easily implemented by a respective low-cost device includes a pressure sensor and a learning machine that generates a sensing signal representing the air/fuel ratio by processing the waveform of the pressure in at least one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.
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Citations
6 Claims
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1. A method for sensing an air/fuel ratio in a combustion chamber of an internal combustion engine, the method comprising:
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sensing a pressure in at least one cylinder of the internal combustion engine; generating a pressure signal representative of the sensed pressure; extracting characteristic parameters of the pressure signal; and generating a signal representative of the air/fuel ratio of the internal combustion engine as a function of the characteristic parameters. - View Dependent Claims (2, 3, 4, 5, 6)
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