CUSHIONED STOP VALVE EVENT DURATION REDUCTION DEVICE

摘要

A phaser with a first connecting port having a first check valve and a first port valve to transfer hydraulic fluid from the advance chamber to the retard chamber and a second connecting port having a second check valve and a second port valve to transfer hydraulic fluid from the retard chamber to the advance chamber. When the vane of the phaser reaches a pre-set point in travel towards the advance or retard wall of the housing, the a port valve closes and the a check valve prevents hydraulic fluid from exiting the advance chamber or retard chamber, retaining a specific amount of hydraulic fluid in the advance chamber or retard chamber between the vane and the advance wall or the vane and the retard wall to prevent the vane from forcefully slamming into the advance or retard wall of the housing.