Gallery, Projects and General > The Design Shop

Rotary valve 4 stroke engine.

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loply:
Can you not just fill it with oil, like any other 4 stroke engine, and rely on splash lubrication to lubricate the bottom end?

nearnexus:

Oil/petrol mixture can be used to lubricate a four stroke engine.

It's use has nothing to do with the engine cycle.

It's just another way of oiling things.  The only determining factor is that the mixture passes all the rubbing/wearing parts and is sufficient quantity.

The only really high wear area in a four stroke is the camshaft and In this case there is no camshaft.

BarryG41:
Petrol oil mixture in a 4 stroke is not unusual in fact very common with LPG engines.  Not seem crankcase mounted carburettor on any motor other than a 2 stroke
 

radfordc:

--- Quote from: nearnexus on August 12, 2011, 06:46:46 PM ---How are you sealing the ends of the rotary valve shaft ?


--- End quote ---

I'm not.  I lapped the rotary valve to fit the bore in the head.  I'm hoping this will suffice?

flutedchamber:
I would think a seal would be needed, especially on the intake valve or it would suck outside air in and lean the mixture.  What about using a sealed ball bearing assembly on the end of each cam?  That would seal AND take care of any wear.

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