Continuously variable valve duration system and operating method thereof
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United States of America Patent
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Nov 3, 2020
Grant Date -
Jan 4, 2018
app pub date -
Jun 29, 2017
filing date -
Jun 30, 2016
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Abstract
A continuously variable valve duration (CVVD) system includes an electronic control unit (ECU) configured to output a command for adjusting an actuator and a controller configured to determine a operation range of a control shaft of the actuator and adjust the control shaft in the determined operation range based on the command of the ECU. The controller positions the control shaft at a predetermined target phase and determines a control state of each target phase based on a target phase value transmitted from the actuator when the control shaft is positioned at the target phase.
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