Latch assembly and valvetrain comprising same

A valvetrain assembly, comprising:

• a valve bridge configured to act on at least one valve, the valve bridge including a pass-through configured to receive a valve end of the at least one valve;
• at least one rocker arm configured to act on the valve bridge;
• and
• a latch assembly configured to act on the valve end, the latch assembly comprising:
• a stationary housing including a plunger cavity and a latch cavity;
• a plunger arranged in the plunger cavity, the plunger including a plunger control end, a plunger body, a spigot body, and a spigot end;
• a controllable upper latch member configured to selectively act on arranged in the latch cavity so as to engage the plunger control end, the controllable upper latch member configured to be selectively switched between:
• a first position in which the controllable upper latch member maintains the plunger extended out of the plunger cavity, and
• a second position in which the controllable upper latch member enables the plunger to retract into the plunger cavity;
• and
• an actuator at least partially received by a latch bore arranged at a latch control end of the controllable upper latch member, the actuator being electrically, electro-mechanically, or pneumatically controlled.