Combustion engine airflow management systems and methods
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United States of America Patent
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Dec 11, 2018
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N/A
app pub date -
Aug 24, 2017
filing date -
Aug 24, 2017
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Abstract
A method of conducting prognosis for an airflow management system for a combustion engine includes adjusting a throttle body valve position control signal in response to a detected airflow variation and monitoring an airflow variation compensation (AVC) value corresponding to a degree of adjustment of the control signal. The method also includes generating a throttle body coking severity metric based on at least a plurality of residual error values and the AVC value, and executing at least one response action based on the throttle body coking severity metric exceeding a predetermined threshold.
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