| 摘要 |
A hydraulic valve for use with a lockable cam phaser. The hydraulic valve is configured to limit the flow of pressure medium to both the advance and retard chambers, while allowing a locking pin of the cam phaser to drain. The hydraulic valve effectively limits flow during the self-centering operation of the cam phaser. This is important for the system function, since it allows the phaser to select a side (i.e., the advance or retard chamber) to bleed off, reducing pressure on that side, which allows the cam phaser to move towards the mid-park (i.e., locking) position. |
