Patent ID: 9109468
Filing Date: 2015-08-18
Classification: F01L,F02B

Abstract:
1. An actuation system, comprising: a housing having a bore formed therein; an autolash piston slidably disposed within the bore in the housing, the autolash piston including a proximal chamber, a middle chamber, and a distal chamber; a main valve slidably disposed within the autolash piston, the main valve having a closed configuration in which the main valve substantially prevents fluid flow between the distal chamber and the middle chamber, and an open configuration in which the distal chamber is in fluid communication with the middle chamber and a main accumulator; a trigger valve configured to selectively place the proximal chamber in fluid communication with a trigger accumulator; a lost-motion piston slidably disposed within the distal chamber, the lost-motion piston being coupled to a component of a valve train; wherein when the trigger valve is opened, fluid flows out of the proximal chamber through the trigger valve, the main valve moves to the open configuration, fluid flows out of the distal chamber into the main accumulator, and the lost-motion piston moves proximally within the autolash piston, thereby allowing the valve train component to be pushed away from one or more other valve train components to allow an engine valve to close.