Ian,
the OMP varies the amount of oil going into the valve.
I have determined that it just
with RPM, and the throttle lever connection cuts the flow way back at
idle, but at not much above idle the flow valve is full
open.
The valve is actually
a
mini intake manifold in parallel to the main intake manifold. When the
rotor sucks the mixture in through the manifold, some
of it is going through
the little vacuum hose and the little hole in the
rotor housing picking up
what oil the OMP got into the valve. This oil is
misted into the combustion
chamber.
If you have no valve, the droplets of oil will only
produce an oil sweat at
the exit in the rotor housing and not doing anything.
Sorry!
This is very
interesting. It is the first time I have seen an explanation of the
valves, and it makes sense. When I got my engine from Atkins, he said to
simple cut off those valves at the injection ports, and block the holes.
The oil still goes
in and gets wiped away by the apex seals; which is primarily what it is
supposed to lubricate. Apparently Mazda had determined that having it
“misted” in was a better idea.
Al