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Originally posted by LubeMaster77
Looks like a 4 lobe Wankel to me - maybe a cross between a Scotch Yoke and a Wankel, then again I'm not a mech eng. One thing that I see right off the bat is the lubrication issues. The wipe is gonna spell trouble. Maybe they could go with ceramics or something.
Wouldn't the efficency be questionable due to the high air exhaust temp presenting right to the intake? (at least thats what it looks like would happen in the pic). Looks like pre-detonation will be a bugger. I think some after coolers would be needed no?
As for use as a Stirling, doesn't a Stirling have a 10-20X displacement stroke compared to its power stroke? That doesn't look right.
Again, I'm no mech eng so educate me please.
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It reminds me a lot of a wankel engine too.
I do not think cooling will be too much of an issue. We solved a lot of our apex seal problems by ditching the factory seal lubrication system and simply premixing the gas like a 2 stroke. The lubricants in the fuel keep the cylinder or housing walls lubricated remarkably well.
When comparing a Rotary using the factory oil pump system, (which pumps a tiny bit of oil through a pin hole in the housing) to a premixed engine the wear on the housing walls was non-existant on the premix and the wear on the factory oiled housings was very obvious.
These guys are on to a good thing here. I wonder if it will be very efficient though. One of the huge drawbacks to a rotary is the lack of fuel efficiency. A regular piston engine can tolerate a leaner condition than a rotary, the roatary relies on the fuel for cooling and lubrications so more is needed.