Design question: Lubrication of PDEs

Hello,

It is probably now widely known that PD engines require a highly specialized type of oil.
The reason given is the high surface pressure in the plasma drive.

Attached is my interpretation of the problem, where the tilting arrow above the adjustment screw is intended to represent the movement of the tilting lever.

During the injection phase, the adjustment screw and ball joint exert estimated forces in the tens of kilograms range, which would essentially "squeeze" the oil (along with the tilting motion) out of the contact surface between the adjustment screw and the ball joint – something that probably happens with normal oil as well, if I understand the situation correctly.

Only PD oil remains smearable there, despite the incredibly high pressures in the storage.

But how does it actually get there, between the adjustment screw and the ball stud?
Do the rocker arm shaft, rocker arm, and adjustment screw have oil holes and channels that allow oil to reach the critical areas?

Or is the oil transported by injection within the valve cover, and does the oil itself draw into the flat surface between the adjustment screw and the ball stud due to the tilting motion?
If so, from where does the oil spray towards the PDE lubrication points?

Hi Ulf.

Lubrication is provided by the pivot lever shaft, or... Lever handles, as long as the lids are tightly closed.

It seems there's a misunderstanding. The adjustment screw on PD motors is solid. The lubrication between the adjustment screw and the ball stud is done with a special grease.
What is shown in the thread is the "drag link carrier" with an axial bore and a sealing plug.
hg
Herbert.