A rocker arm assembly for pivoting around a rocker shaft comprises a follower side arm, a valve side arm, and a latch assembly. The follower side arm comprises a main body (1016, 2016, 3016), a rocker shaft through-bore (1061), and a follower end (11, 21, 31) comprising a latch through-bore (1019, 2019, 3019). The valve side arm comprises a forked body (1026, 2026) and a valve end (12,22) extending from the forked body. A first arm extension (1025, 2025, 3025) and a second arm extension (1028, 2028, 3028) extend from the forked body and straddle the main body. A first distal end (1125, 2125) comprises a first latch pocket (51) distal from the forked body. A second distal end (1128, 2128) comprises a second latch pocket (81) distal from the forked body. The latch through-bore selectively aligns with the first latch pocket and the second latch pocket.

A rocker arm assembly for pivoting around a rocker shaft comprises a follower side arm, a valve side arm, and a latch assembly. The follower side arm comprises a main body (1016, 2016, 3016), a rocker shaft through-bore (1061), and a follower end (11, 21, 31) comprising a latch through-bore (1019, 2019, 3019). The valve side arm comprises a forked body (1026, 2026) and a valve end (12,22) extending from the forked body. A first arm extension (1025, 2025, 3025) and a second arm extension (1028, 2028, 3028) extend from the forked body and straddle the main body. A first distal end (1125, 2125) comprises a first latch pocket (51) distal from the forked body. A second distal end (1128, 2128) comprises a second latch pocket (81) distal from the forked body. The latch through-bore selectively aligns with the first latch pocket and the second latch pocket.

Methods and systems are provided for actuating an advanced cam profile switch (CPS) assembly. In one example, a system may include a first cylinder and a second cylinder of the CPS assembly that may be independently coupleable to a valve stem via two separate locking mechanisms. A first cam may be selectively engage with the first cylinder and the valve stem and a second cam may be selectively engaged with the second cylinder and the valve stem.

Methods and systems are provided for actuating an advanced cam profile switch (CPS) assembly. In one example, a system may include a first cylinder and a second cylinder of the CPS assembly that may be independently coupleable to a valve stem via two separate locking mechanisms. A first cam may be selectively engage with the first cylinder and the valve stem and a second cam may be selectively engaged with the second cylinder and the valve stem.

A rocker arm assembly can comprise a main rocker arm and a latch assembly. A latching arm can control the latch assembly and thereby control the extent to which a secondary rocker arm acts on the main rocker arm. The main rocker arm can comprise a main body configured to rotate around a rocker shaft, a valve end extending from the main body, a reaction end extending from the main body, and a latch bore. A bias pin can extend from the main body. The latch assembly can be configured to selectively rotate in the latch bore. The latch assembly can comprise a first latch end comprising a switch plate configured to receive actuation force on a first side and to receive bias force from the bias pin on a second side. A second latch end can comprise a first latch seat and a second latch seat.

A rocker arm assembly can comprise a main rocker arm and a latch assembly. A latching arm can control the latch assembly and thereby control the extent to which a secondary rocker arm acts on the main rocker arm. The main rocker arm can comprise a main body configured to rotate around a rocker shaft, a valve end extending from the main body, a reaction end extending from the main body, and a latch bore. A bias pin can extend from the main body. The latch assembly can be configured to selectively rotate in the latch bore. The latch assembly can comprise a first latch end comprising a switch plate configured to receive actuation force on a first side and to receive bias force from the bias pin on a second side. A second latch end can comprise a first latch seat and a second latch seat.

Disclosured herein are apparatus and methods relating to combustion engines. In an example, a combustion engine includes a head and a rocker assembly. The rocker assembly including: a rocker shaft including therein a pressure reservoir, a pedestal support adapted to be fastened to the head and sized and structured to support the rocker shaft, a rocker lever pivotally supported by the rocker shaft, and a hydraulic engine brake mechanism within the rocker lever including a hydraulic control valve configured to selectively actuate an exhaust valve of the combustion engine.

A combined plug-sensor wheel for a camshaft is disclosed. The combined plug-sensor wheel includes a pin projecting in an axial direction of the camshaft. The pin, when inserted into the camshaft, seals the camshaft in a fluid-tight manner. According to an implementation, the combined plug-sensor wheel and the camshaft are incorporated into an internal combustion engine.

A combined plug-sensor wheel for a camshaft is disclosed. The combined plug-sensor wheel includes a pin projecting in an axial direction of the camshaft. The pin, when inserted into the camshaft, seals the camshaft in a fluid-tight manner. According to an implementation, the combined plug-sensor wheel and the camshaft are incorporated into an internal combustion engine.

A switching roller finger follower comprises an inner arm assembly. A pair of outer arms surround the inner arm assembly. A pivot axle connects the inner arm assembly to pivot with respect to the pair of outer arms from a starting position to a lost motion position. A latch assembly comprises a latch selectively movable from a latched position latching the inner arm assembly to move dependent with the outer arms and an unlatched position unlatching the inner arm assembly to pivot independent of the outer arms. A stop pin spans between the pair of outer arms and through an inner port in an axle of inner arm assembly. The stop pin comprises a clearance fit with the inner port, and the stop pin is configured pivotable independent of the outer arms. At least one return spring biases the stop pin toward the starting position.