| 摘要 |
<p>A VCT system for an engine with at least one camshaft comprising: a housing, a rotor, and a controlled bypass valve. The controlled bypass provides fluid communication between the chambers. When the controlled bypass valve is closed, the valve blocks passage between the chambers and when the valve is open, fluid flows through the passage extending between the advance and the retard chamber, allowing the phaser to be rapidly actuated to a full retard position prior to peak valve lift, which then causes the camshaft torque, oil pressure or a combination of both to rapidly advance the camshaft during the closing half of the valve event or zero lift.</p> |
