Lost motion valve actuation systems with locking elements including wedge locking elements

In an internal combustion engine comprising a valve train for actuating one or more engine valves, a device for controlling motion applied to the one or more engine valves, comprising:

• an housing disposed within the valve train, the housing having an housing bore extending into the housing;
• a locking mechanism disposed in the housing bore, a locked state of the locking mechanism permitting application of motion to the one or more engine valves via the device and an unlocked state of the locking mechanism preventing application of motion to the one or more engine valves via the device;
• and
• a snubber, disposed in the housing bore between the locking mechanism and the housing and in communication with the locking mechanism, configured to progressively arrest movement of at least a portion of the locking mechanism through controlled flow of hydraulic fluid.

In an internal combustion engine comprising a valve train for actuating one or more engine valves, a device for controlling motion applied to the one or more engine valves, comprising:

• an housing disposed within the valve train, the housing having a housing bore extending into the housing and an outer recess formed in a surface defining the housing bore;
• and
• a locking mechanism disposed in the housing bore and comprising a locking element, wherein the locking element engages the outer recess in a locked state of the locking mechanism thereby permitting application of motion to one or more engine valves via the device,
• wherein the outer recess is configured to permit movement of the locking element along a longitudinal axis of the housing bore when the locking element engages the outer recess.