초록

An actuator for an engine braking system for moving an exhaust valve includes a master fluid control device concentrically disposed within a bore in a slave fluid control device.

대표청구항 ▼

An actuator for an engine braking system for moving an exhaust valve between open and closed positions, comprising: a main body having an actuator receiving bore therein; a three-way fluid control valve disposed in the main body in fluid communication with the actuator receiving bore and electricall

An actuator for an engine braking system for moving an exhaust valve between open and closed positions, comprising: a main body having an actuator receiving bore therein; a three-way fluid control valve disposed in the main body in fluid communication with the actuator receiving bore and electrically operable to selectively pass fluid into or drain fluid from the actuator receiving bore; a slave fluid control device engagable with the exhaust valve and having a further bore therethrough and disposed in the actuator receiving bore; and a master fluid control device concentrically disposed within the bore of the slave fluid control device and movable to apply high fluid pressure to said the slave fluid control device, said master fluid control device and the slave fluid control device being responsive to fluid passed into the actuator receiving bore by the control valve to move the exhaust valve to the open position and are further responsive to draining of fluid from the actuator receiving bore by the control valve to move the exhaust valve to the closed position.