Spark knock detection system for an internal combustion engine
First Claim
1. A system for detecting spark knock in an internal combustion engine comprising:
- vibration detection means connected in proximity to the engine for converting a vibration into an electrical output signal representative of said vibration;
sampling means connected to said vibration detection means for sampling said electrical output signal and converting said electrical output signal into a digital data pattern corresponding to said electrical output signal;
feature extraction means connected to said sampling means for converting said digital data pattern into frequency domain signal values forming a frequency domain pattern, each value having a magnitude;
trained classification means connected to said feature extraction means for receiving said frequency domain pattern and having predetermined coefficients determined during training for classifying said frequency domain pattern to indicate the presence of spark knock.
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Accused Products
Abstract
A spark knock detection system is disclosed which has a vibration detector connected in proximity to the engine for converting a vibration into an electrical output signal representative of the vibration. A sampler which is connected to the vibration detector samples the electrical output signal and converts the electrical output signal into a numerical data pattern corresponding to the electrical output signal. A feature extractor which is connected to the sampler converts the numerical data pattern into frequency domain signal portions which have a magnitude. A classifier which is connected to the feature extractor receives the frequency domain signal portions. The classifier has predetermined coefficients for classifying the frequency domain signal portions to indicate the presence of spark knock.
50 Citations
20 Claims
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1. A system for detecting spark knock in an internal combustion engine comprising:
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vibration detection means connected in proximity to the engine for converting a vibration into an electrical output signal representative of said vibration; sampling means connected to said vibration detection means for sampling said electrical output signal and converting said electrical output signal into a digital data pattern corresponding to said electrical output signal; feature extraction means connected to said sampling means for converting said digital data pattern into frequency domain signal values forming a frequency domain pattern, each value having a magnitude; trained classification means connected to said feature extraction means for receiving said frequency domain pattern and having predetermined coefficients determined during training for classifying said frequency domain pattern to indicate the presence of spark knock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for detecting spark knock in an internal combustion engine comprising:
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engine control means for controlling the operation of the engine based on predetermined inputs; sensing means connected in proximity of the engine for converting a vibratory waveform into an electrical output signal indicative of said vibratory waveform; sampling means connected to said sensing means for sampling a portion of said electrical output signal and converting said electrical output signal into a digital data pattern; trained classification means connected to said sampling means for receiving said digital data pattern from said sampling means and classifying said digital data pattern based on a plurality of trained coefficients; and output means connected to said trained classification means for providing an electrical signal for indicating the presence of spark knock to said engine control means so that the engine control means can adjust said predetermined outputs to eliminate spark knock. - View Dependent Claims (16, 17)
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18. Method of determining spark knock in an internal combustion engine comprising the steps of:
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converting a vibratory waveform into an electrical output signal indicative of said vibratory waveform; sampling and converting said electrical output signal into a digital data pattern; converting said digital data pattern into frequency domain signal pattern; classifying said frequency domain signal pattern based on a weighted coefficients using said frequency domain signal pattern and coefficients determined by training; and indicating the presence of spark knock based on said weighted calculation. - View Dependent Claims (19, 20)
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Specification