Rocker arm with a reset slider disposed in a lash adjustment assembly

A rocker arm for actuating at least one engine valve in an internal combustion engine and having a motion imparting end, the rocker arm comprising:

• an actuator piston slidably disposed in an actuator piston bore formed in the motion imparting end of the rocker arm;
• a lash adjustment assembly disposed in the motion imparting end, the lash adjustment assembly comprising a lash adjustment screw including an internal bore;
• a hydraulic passage in fluid communication with the actuator piston bore and the internal bore;
• and
• a resetting assembly disposed in the lash adjustment assembly, the resetting assembly comprising:
• a checking element in fluid communication with the internal bore;
• and
• a reset slider slidably disposed in the internal bore, the reset slider including (i) a first end configured to engage a valve train component or a first engine valve of the at least one engine valve, and (ii) a second end including a resetting pin configured to force the checking element into an unchecked state in response to a positioning of the rocker arm when the first end engages the valve train component or the first engine valve,
• wherein the lash adjustment screw further includes a venting passage formed as a radially extending vent opening in fluid communication with the internal bore, the venting passage configured such that, in the unchecked state, hydraulic fluid in the actuator piston bore passes through the venting passage to an ambient environment.