Rocker arm assembly for engine braking

2:

• The exhaust valve rocker arm assembly of claim 1, further comprising:
• a pressure relief valve assembly disposed on the rocker arm and configured to selectively release oil from the hydraulic lash adjuster assembly.

3:

• The exhaust valve rocker arm assembly of claim 2, wherein the pressure relief valve assembly includes a pressure relief valve biasing member, a plunger, and a support ring.

4:

• The exhaust valve rocker arm assembly of claim 1, further comprising:
• a spigot disposed on the rocker arm,
• wherein, in the engine braking mode, subsequent to the opening of the first valve the predetermined distance, further rotation of the rocker arm causes the spigot to move the valve bridge and open the second valve while further opening the first valve.

5:

• The exhaust valve rocker arm assembly of claim 4, wherein the oil discharge circuit is collectively defined by a first connecting passage and an outlet passage defined in the rocker arm and a pass-through channel defined in the spigot.

6:

• The exhaust valve rocker arm assembly of claim 5, wherein the first connecting passage connects a bore defined in the rocker arm that receives the disk portion with a spigot receiving passage that receives the spigot.

7:

• The exhaust valve rocker arm assembly of claim 6, wherein the spigot is configured to translate along the spigot receiving passage relative to the rocker arm, and
• wherein a predetermined rotation of the rocker arm will align the first connecting passage, the pass-through channel, and the outlet passage, and depressurize oil from under the disk portion of the needle.

8:

• The exhaust valve rocker assembly of claim 1, wherein the hydraulic lash adjuster assembly further includes a second plunger body that is at least partially received by the first plunger body, and
• wherein the second plunger body defines a valve seat.

9:

• The exhaust valve rocker assembly of claim 7, wherein the check valve is disposed between the first and second plunger bodies, and
• wherein the check valve further includes a check ball configured to selectively seat against the valve seat on the second plunger body.

10:

• The exhaust valve rocker assembly of claim 7, wherein the spigot is configured to slidably translate along the spigot receiving passage prior to moving the bridge portion.