A rocker arm assembly for use in a valve train carrier, the rocker arm assembly being rotatable around a rocker shaft supported by the valve train carrier based upon a lift profile provided on a cam that rotates with a camshaft, a rotation of the rocker arm assembly causing translation of a corresponding engine valve, includes: a rocker arm body having an opening that receives the rocker shaft, the rocker arm body further defining an oil supply channel; a capsule assembly disposed on the rocker arm body and that selectively communicates oil to and from the oil supply channel, the capsule assembly including: 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 move the engine valve.

Embodiments of the disclosure provide variable valve timing (VVT) mechanisms. A VVT mechanism according to the disclosure can include: a lever having a first end, a second end, and a fulcrum positioned therebetween; a length-adjustable push rod coupled to the first end of the lever and including an actuator therein; a rod valve coupled to the second end of the lever, the rod valve being configured to open and close an intake valve of an engine system based on a movement of the lever; and an engine control unit (ECU) operatively connected to the actuator of the length-adjustable push rod, wherein the ECU adjusts a length of the length-adjustable push rod based on an operating condition of the engine system. In addition or alternatively, the ECU can control an amount of cushioning fluid for the valves to affect the rate at which the intake valve opens or closes.

A valve actuation system for actuating at least one of two or more engine valves in an internal combustion engine comprises at least one motion source including a first motion source configured to provide an exhaust main valve event. A valve train for conveying valve events from the at least one motion source to the two or more engine valves comprises a lost motion component for selectively conveying valve events to the at least one of the two or more engine valves. A phasing assembly is configured to advance a phase of at least the first motion source and the exhaust main valve event. The at least one motion source is configured to provide a recompression relief valve event to the at least one of the two or more engine valves when the phase of the exhaust main valve event is advanced.

A valve actuation system for actuating at least one of two or more engine valves in an internal combustion engine comprises at least one motion source including a first motion source configured to provide an exhaust main valve event. A valve train for conveying valve events from the at least one motion source to the two or more engine valves comprises a lost motion component for selectively conveying valve events to the at least one of the two or more engine valves. A phasing assembly is configured to advance a phase of at least the first motion source and the exhaust main valve event. The at least one motion source is configured to provide a recompression relief valve event to the at least one of the two or more engine valves when the phase of the exhaust main valve event is advanced.

A rocker arm assembly for actuating a valve. The rocker arm assembly including a rocker arm having a valve side and a cam side. The rocker arm being pivotable about a rocker shaft via actuation on the cam side. At least one roller assembly is attached to the rocker arm. A latch assembly is provided for selectively latching the at least one roller assembly to the rocker arm, wherein when the latch assembly is in a lost motion state the at least one roller assembly is free to pivot relative to the rocker arm and when the latch assembly is in an activated state the at least one roller assembly is pivotably coupled to the rocker arm.