DUAL OPERATION HYDRAULIC CONTROL

摘要

A pressurized fluid storage system is suitable for use to rapidly engage a transmission following an engine shutdown. The system includes a reservoir, such as an accumulator, connected to a manifold by a single passageway. A pump provides pressurized fluid to the manifold while a transmission control system draws fluid from the manifold. A check valve in the single passageway passively holds fluid in the reservoir when pressure in the reservoir exceeds pressure in the manifold and allows flow into the reservoir when the manifold pressure is higher. An actively controlled actuator overrides the passive check ball to release pressurized fluid into the manifold to rapidly re-engage transmission clutches.

主权项

1. A pressurized fluid storage system comprising:
a manifold in fluid communication with a source of pressurized fluid and in fluid communication with a sink for pressurized fluid; a reservoir; a passageway fluidly connecting the reservoir to the manifold; a plug within the passageway configured to block the passageway in response to a pressure of fluid in the reservoir exceeding a pressure of fluid in the manifold and to passively move into a position that permits flow through the passageway in response to the pressure of fluid in the manifold exceeding the pressure of fluid in the reservoir; and an actuator configured to move the plug into a position that permits flow through the passageway in response to a control signal.