Variable valve actuation system for type II valverain using lost motion and reset

A rocker arm assembly for a Type II valvetrain arranged for cooperation with a cylinder head, the rocker arm assembly comprising:

• a roller finger follower (RFF) having a first end and a second end, the first end cooperating with a valve;
• a lost motion with reset (LMR) hydraulic assembly configured at the second end of the RFF and disposed in the cylinder head, the LMR hydraulic assembly comprising:
• a plunger assembly having a plunger that selectively translates within a plunger chamber between an extended rigid position based upon the plunger chamber being pressurized with oil and a retracted non-rigid position based upon the plunger chamber being depressurized, the plunger moving the engine valve toward an open position;
• and
• a shuttle assembly that moves between a first position and a second position based upon oil communicated into the LMR hydraulic assembly from an oil supply channel, the shuttle assembly having a shuttle valve that selectively moves between a closed position and an open position wherein in the open position oil flows into the plunger chamber;
• and
• wherein the rocker arm assembly sequentially moves along a (i) a first valve lift profile wherein pressurized oil is communicated from the oil supply channel, the shuttle assembly moving into the second position causing the shuttle valve to be opened, the pressure chamber to be pressurized and the plunger to move to the extended rigid position, (ii) a reset valve lift profile wherein pressurized oil is not communicated from the oil supply channel, the shuttle assembly moving into the first position, and (iii) a valve closing profile.