| 摘要 |
<p>A system (100) for controlling the seating of an engine valve (600) is disclosed. The system is designed to bring a hydraulically actuated engine valve (600) to a soft landing on its valve seat. The velocity of the engine valve is reduced as it approaches its seat by progressively throttling the escape of hydraulic fluid from a chamber (740). The chamber is pressurized as a result of the valve approaching its seat. Accordingly, as the valve approaches its seat, the pressure in the chamber increases, causing the force that opposes the closing motion of the engine valve to increase.</p> |
