ENGINE CONTROL SYSTEM AND METHOD FOR CONTROLLING ACTIVATION OF SOLENOID VALVES
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United States of America
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Issued Date -
Jan 23, 2020
app pub date -
Jul 17, 2018
filing date -
Jul 17, 2018
priority date (Note) -
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Abstract
A valve controller and method for controlling a valve having a solenoid are disclosed, including receiving a least one input signal, detecting a first edge of the at least one signal and in response to the detection activating the valve. Activating the valve includes activating the valve in a rise-to-peak phase during which the valve is opened, a hold phase following the rise-to-peak phase during which the valve remains open and a current level of the valve is less than a current level of the valve during the rise-to-peak phase, and an ending-of-activation phase following the hold phase during which current ripple in the valve is less than the current ripple in the valve during the hold phase.
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