Patent ID: 7077082

Claim:
An engine valve actuation system, comprising: an intake valve moveable between a first position where the intake valve prevents a flow of fluid relative to the intake valve and a second position where the intake valve allows a flow of fluid relative to the intake valve; a cam assembly configured to move the intake valve between the first position and the second position; a fluid actuator having a chamber and being adapted to selectively prevent the intake valve from moving in response to the cam assembly to the first position; a fluid supply system adapted to deliver fluid to the chamber of the actuator; a pressure sensor operatively engaged with the fluid supply system and adapted to sense the pressure of the fluid within the fluid supply system; and a controller adapted to receive the sensed pressure of the fluid within the fluid supply system, to determine an expected pressure of the fluid within the fluid supply system, to identify when the sensed pressure deviates from the expected pressure, and to generate a responsive fault signal.