DRIVE CIRCUIT FOR ESTIMATING FLUID FLOW BASED ON VALVE CLOSURE TIME
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United States of America Patent
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Issued Date -
Sep 26, 2024
app pub date -
Jun 3, 2024
filing date -
Oct 29, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A drive circuit for a solenoid valve having a coil and a poppet configured to translate within the coil includes a drive switch operable to de-energize the coil to translate the poppet toward the closed position, a sensor configured to detect the poppet translating within the solenoid valve, and a controller configured to receive a closure signal from the sensor, determine a closing time of the solenoid valve based on the closure signal, determine a time delay between de-energizing the coil and the determined closing time, and determine a fluid flow value of fluid flowing through the solenoid valve based on the determined time delay.
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