Patent ID: 8312849

Claim:
A system for variable actuation of first and second intake valves of a cylinder in an internal combustion engine having a camshaft, comprising: a selectively locked two-step actuation device operatively engaging the camshaft and said first intake valve, said two-step actuation device having a high-lift operational state in which said first intake valve reaches a maximum lift open position and a low-lift operational state in which said first intake valve reaches only to an open lift position intermediate a closed position and said maximum lift open position, selective locking of said two-step actuation device placing said two-step actuation device in one of said high-lift and low-lift operational states, selective unlocking of said two-step actuation device placing said two-step actuation device in the other of said high-lift and low-lift operational states; and a selectively locked valve deactivation device operatively engaging the camshaft and said second intake valve, said valve deactivation device having an activated state of operation in which said second intake valve reaches an open position and a deactivated state of operation in which said second intake valve remains in a closed position, selective locking of said valve deactivation device placing said valve deactivation device in one of said activated and deactivated states of operation, selective unlocking of said deactivation device placing said valve deactivation device in the other of said activated and deactivated states of operation.