Patent ID: 7255075
Filing Date: 2007-08-14
Classification: F01L,F02B,Y02T

Abstract:
1. An engine valve actuation system, comprising: an intake valve moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid; a cam assembly connected to move the intake valve between the first position and the second position; a fluid actuator configured to selectively prevent the intake valve from moving to the first position; a first source of fluid in fluid communication with the fluid actuator; a second source of fluid configured to provide fluid having a pressure greater than the pressure of the fluid supplied by said first source of fluid; a directional control valve configured to control a flow of fluid between the source of fluid and the fluid actuator; and a directional control valve disposed between either the first or the second source of fluid and the fluid actuator and moveable between a first position to prevent a flow of fluid between either the first or the second source of fluid and the directional control valve and a second position to allow the flow of fluid from either the first or the second source of fluid to the directional control valve.