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    • 72. 发明授权
    • Engine valve control system and method
    • 发动机气门控制系统及方法
    • US07415950B2
    • 2008-08-26
    • US11627316
    • 2007-01-25
    • James ErvinYan WangThomas Megll
    • James ErvinYan WangThomas Megll
    • F01L9/04
    • F02D13/0253F01L9/04F01L2009/0436Y02T10/18
    • A method of operating an engine having at least one cylinder, said cylinder including at least one electric valve actuator, said actuator including at least a coil and an armature moveable thereto, the method comprising during a non-firing state of the cylinder: holding the armature of the actuator at a first position away from an equilibrium position by supplying a first amount of current to a first coil of the actuator; and reducing current supplied to the first coil from said first amount to a lower second amount to cause the armature to begin moving toward the equilibrium position; and during a subsequent firing state of the cylinder, varying an amount of holding current supplied to the first coil for holding the armature away from the equilibrium position based on at least said second amount of current.
    • 一种操作具有至少一个气缸的发动机的方法,所述气缸包括至少一个电动阀致动器,所述致动器包括至少一个线圈和可移动到其上的衔铁,该方法包括在气缸的非点火状态期间: 通过向致动器的第一线圈提供第一量的电流,致动器的电枢位于离开平衡位置的第一位置处; 以及将从所述第一量提供给所述第一线圈的电流减小到较低的第二量,以使所述电枢开始朝向所述平衡位置移动; 并且在所述气缸的随后的点火状态期间,基于至少所述第二电流量,改变提供给所述第一线圈的保持电流的量以保持所述电枢远离所述平衡位置。