Combinations and sub combinations of valvetrain assemblies

A valvetrain assembly, comprising:

• a rocker arm carrier,
• a rocker arm rotatably supported by the rocker arm carrier,
• two engine valves comprising at least a first engine valve and a second engine valve,
• a valve bridge spanning the two engine valves and connected between the two engine valves and one end of the rocker arm,
• a switching mechanism operatively coupled to the rocker arm and including a first body and a second body which are configured for relative movement with respect to each other, and
• a retention feature,
• wherein the retention feature comprises one or more protrusions on a top surface of the valve bridge, the one or more protrusions attach the valve bridge to the rocker arm, and
• wherein the retention feature is configured to maintain a position of the valve bridge to be aligned with the two engine valves and resist separation of the valve bridge from the two engine valves during uncontrolled valve bridge movement.

A valvetrain assembly, comprising:

• a rocker arm carrier,
• a rocker arm rotatably supported by the rocker arm carrier,
• two engine valves comprising at least a first engine valve and a second engine valve,
• a valve bridge spanning the two engine valves and connected between the two engine valves and one end of the rocker arm,
• a switching mechanism operatively coupled to the rocker arm and including a first body and a second body which are configured for relative movement with respect to each other,
• a socket positioned on a lower surface at another end of the rocker arm and configured to receive a push rod, the socket having a depth that prevents the push rod from separating from the socket during uncontrolled valve bridge movement, and
• a mechanical stopper which is disposed on an upper surface of the rocker arm carrier and configured to contact against a lower surface of the rocker arm during uncontrolled valve bridge movement,
• wherein the socket and the mechanical stopper are configured to limit motion of the rocker arm and prevent the valve bridge from separating from the two engine valves during uncontrolled valve bridge movement.