Discrete variable valve lift diagnostic systems and methods
A diagnostic system for a discrete variable valve lift system of an internal combustion engine is provided. The system includes: a Fast Fourier Transform (FFT) module that generates a frequency content signal based on a FFT method and a valve impact sensor signal; and a malfunction module that selec...
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Format | Patent |
Language | English |
Published |
17.06.2008
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Subjects | |
Online Access | Get full text |
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Abstract | A diagnostic system for a discrete variable valve lift system of an internal combustion engine is provided. The system includes: a Fast Fourier Transform (FFT) module that generates a frequency content signal based on a FFT method and a valve impact sensor signal; and a malfunction module that selectively diagnoses a malfunction of a discrete variable valve lift system based on the frequency content signal. |
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AbstractList | A diagnostic system for a discrete variable valve lift system of an internal combustion engine is provided. The system includes: a Fast Fourier Transform (FFT) module that generates a frequency content signal based on a FFT method and a valve impact sensor signal; and a malfunction module that selectively diagnoses a malfunction of a discrete variable valve lift system based on the frequency content signal. |
Author | WILES MATTHEW A |
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Snippet | A diagnostic system for a discrete variable valve lift system of an internal combustion engine is provided. The system includes: a Fast Fourier Transform (FFT)... |
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SubjectTerms | MEASURING PHYSICS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR |
Title | Discrete variable valve lift diagnostic systems and methods |
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