Abstract: A center pivot roller rocker arm assembly can comprise a main roller rocker arm, a second roller rocker arm, and a latching assembly. The main roller rocker arm can comprise a rocker shaft bore, a valve end, a cam end, and a main cam surface on the cam end. The second roller rocker arm can comprise a second rocker shaft bore, a second cam end, and a second cam surface on the second cam end. The latching assembly can be coupled to the rocker shaft bore and configured to latch and unlatch the main roller rocker arm to the second roller rocker arm. A lost motion assembly can be configured with the main and second roller rocker arms. A main cam surface can have a different extent for receiving cam actuation than a second cam surface.

Abstract: A swing bridge for a rocker arm assembly is provided. The swing bridge may be configured to be selectively actuated by a first rocker arm or a second rocker arm and span a first valve and a second valve. The swing bridge may have a bridge body, and a swing mechanism disposed at least partially in the bridge body. The swing mechanism may have a first surface for receiving motion from the first rocker arm and be configured to transfer the motion to the first valve through a rotary portion that is rotatable relative to the bridge body. The swing bridge may swing angularly upon actuation by the first rocker arm so as to actuate the first valve without actuating the second valve and actuate both the first valve and the second valve upon actuation by the second rocker arm.

Abstract: A double pressure capsule assembly for actuating a valve. The capsule assembly includes a plunger movable between a deactivated position wherein the plunger is disengaged from the valve and an activated position wherein the plunger engages the valve. The plunger divides the housing into a first chamber connected to a first source of fluid at a first pressure and a second chamber selectively connected to a second source of fluid at the first pressure. The plunger has a first surface area bordering the first chamber and a second surface area bordering the second chamber. The first surface area is less than the second surface area. A check valve divides the second chamber into a first sub-chamber and a second sub-chamber. A piston is disposed in the second chamber and is movable to engage the check valve and move the check valve to the open position.

Abstract: A rocker arm assembly comprises a first rocker arm having a first valve end, a second rocker arm having a second valve end, a first valve, a second valve, a hydraulic capsule disposed in the first valve end and movable between an extended and retracted position, and a swing bridge selectively actuatable by the first or second rocker arm and span the first and second valve. In engine brake mode, the hydraulic capsule moves to the extended position, causing the swing bridge to swing angularly as the first rocker arm rotates so as to actuate the first valve without actuating the second valve. In drive mode, the hydraulic capsule moves to the retracted position, and the swing bridge is actuated by the second valve end of the second rocker arm as the second rocker arm rotates so as to actuate both the first valve and the second valve.

Abstract: A swing bridge for a rocker arm assembly is provided. The swing bridge may be configured to be selectively actuated by a first rocker arm or a second rocker arm and span a first valve and a second valve. The swing bridge may have a bridge body, and a swing mechanism disposed at least partially in the bridge body. The swing mechanism may have a first surface for receiving motion from the first rocker arm and be configured to transfer the motion to the first valve through a rotary portion that is rotatable relative to the bridge body. The swing bridge may swing angularly upon actuation by the first rocker arm so as to actuate the first valve without actuating the second valve and actuate both the first valve and the second valve upon actuation by the second rocker arm.

Abstract: A castellation assembly can comprise a first toothed body comprising a first toothed end and a biased end comprising a projecting lever. The projecting lever can be configured to extend out from the biased end and contact an actuation lever throughout a travel of the first toothed body. The second toothed body can comprise a base and a second toothed end configured to mesh between or stack against the first toothed end. A castellation spring can be configured to push the first and second toothed body apart. An actuator assembly can actuate the castellation assembly and comprise an actuating lever assembly configured to reciprocate between a contacting position against the projecting lever and a clearance position spaced from the projecting lever. A rocker arm in a valvetrain can be controlled for variable valve actuation thereby.

Abstract: A rocker arm assembly comprises a first rocker arm having a first valve end, a second rocker arm having a second valve end, a first valve, a second valve, a hydraulic capsule disposed in the first valve end and movable between an extended and retracted position, and a swing bridge selectively actuatable by the first or second rocker arm and span the first and second valve. In engine brake mode, the hydraulic capsule moves to the extended position, causing the swing bridge to swing angularly as the first rocker arm rotates so as to actuate the first valve without actuating the second valve. In drive mode, the hydraulic capsule moves to the retracted position, and the swing bridge is actuated by the second valve end of the second rocker arm as the second rocker arm rotates so as to actuate both the first valve and the second valve.

Abstract: A swing bridge for a rocker arm assembly is provided. The swing bridge is configured to be selectively actuated by a first rocker arm or a second rocker arm and span a first valve and a second valve. The swing bridge comprises a bridge body including a through opening and a bore intersecting the through opening, and a swing mechanism configured to connect between the first rocker arm and the first valve. The swing mechanism comprises a swing pin configured to swing in the through opening and a rotary cylinder configured to support the swing pin and rotate in the bore. In particular, the swing bridge may swing angularly upon actuation by the first rocker arm so as to actuate the first valve without actuating the second valve and may actuate both the first valve and the second valve upon actuation by the second rocker arm.

Abstract: A swing bridge for a rocker arm assembly is provided. The swing bridge is configured to be selectively actuated by a first rocker arm or a second rocker arm and span a first valve and a second valve. The swing bridge comprises a bridge body including a through opening and a bore intersecting the through opening, and a swing mechanism configured to connect between the first rocker arm and the first valve. The swing mechanism comprises a swing pin configured to swing in the through opening and a rotary cylinder configured to support the swing pin and rotate in the bore. In particular, the swing bridge may swing angularly upon actuation by the first rocker arm so as to actuate the first valve without actuating the second valve and may actuate both the first valve and the second valve upon actuation by the second rocker arm.

Abstract: A rocker arm assembly comprises a first rocker arm having a first valve end, a second rocker arm having a second valve end, a first valve, a second valve, a hydraulic capsule disposed in the first valve end and movable between an extended and retracted position, and a swing bridge selectively actuatable by the first or second rocker arm and span the first and second valve. In engine brake mode, the hydraulic capsule moves to the extended position, causing the swing bridge to swing angularly as the first rocker arm rotates so as to actuate the first valve without actuating the second valve. In drive mode, the hydraulic capsule moves to the retracted position, and the swing bridge is actuated by the second valve end of the second rocker arm as the second rocker arm rotates so as to actuate both the first valve and the second valve.

Abstract: A center pivot roller rocker arm assembly can comprise a main roller rocker arm, a second roller rocker arm, and a latching assembly. The main roller rocker arm can comprise a rocker shaft bore, a valve end, a cam end, and a main cam surface on the cam end. The second roller rocker arm can comprise a second rocker shaft bore, a second cam end, and a second cam surface on the second cam end. The latching assembly can be coupled to the rocker shaft bore and configured to latch and unlatch the main roller rocker arm to the second roller rocker arm. A lost motion assembly can be configured with the main and second roller rocker arms. A main cam surface can have a different extent for receiving cam actuation than a second cam surface.

Abstract: A castellation assembly (600) can comprise a first toothed body (601) comprising a first toothed end (611) and a biased end (610) comprising a projecting lever (615). The projecting lever can be configured to extend out from the biased end and contact an actuation lever throughout a travel of the first toothed body. The second toothed body can comprise a base (620) and a second toothed end (621) configured to mesh between or stack against the first toothed end. A castellation spring (630) can be configured to push the first and second toothed body apart. An actuator assembly (40) can actuate the castellation assembly and comprise an actuating lever assembly (50) configured to reciprocate between a contacting position against the projecting lever and a clearance position spaced from the projecting lever. A rocker arm (100) in a valvetrain can be controlled for variable valve actuation thereby.