Negative Pressure Oil Pans
#1
Rotary Freak
Thread Starter
Negative Pressure Oil Pans
It is an area of strong interest in piston driven engines. I am trying to figure out if it is of value in rotaries as the negative crankshaft pressure helps the rings to seal, however I don't know how a negative pressure eccentric shaft case would help anything seal on a rotary.
Just pondering.....
Peterson Fluid Systems : Engine Breather
Seems cheap enough for an advantage.
Eric
Just pondering.....
Peterson Fluid Systems : Engine Breather
Seems cheap enough for an advantage.
Eric
#2
Rotary Motoring
iTrader: (9)
I put the sump under intake vacuum for a while on my TII as I had a problem with excessive oil pressures at idle and leaking turbo exhaust seals causing smoking.
It worked, but I wasn't able to keep from sucking oil into the intake cornering- so I abandoned it and went about lowering oil pressure at idle on my next build.
A proper air/oil separator might have worked instead of what I made or better putting a vacuum tap in the exhaust downpipe.
As for helping anything seal on a NA rotary... I don't believe so. Just the oil control rings see sump pressure.
It worked, but I wasn't able to keep from sucking oil into the intake cornering- so I abandoned it and went about lowering oil pressure at idle on my next build.
A proper air/oil separator might have worked instead of what I made or better putting a vacuum tap in the exhaust downpipe.
As for helping anything seal on a NA rotary... I don't believe so. Just the oil control rings see sump pressure.
#3
Rotary Freak
Thread Starter
Thats what I could think of, but wasn't absolutely sure. Oh well, I will try them on my other car. It sure could use the concept as it revs to 9,000 rpm so there must be a lot of crankcase pumping going on.
Eric
Eric
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