ebinmaine 63,343 #1 Posted January 20 https://www.enginelabs.com/news/new-mazda-engine-patent-for-a-supercharged-2-stroke-skyactiv-engine/ 1 2 Share this post Link to post Share on other sites
WHX?? 46,941 #2 Posted January 20 Reminds me of the two strokes with valves in some Stihl products that require mixing gas/oil. 1 Share this post Link to post Share on other sites
JoeM 7,700 #3 Posted January 20 Until they find a material that doesn't require lubrication for the rings the search goes on. Wonder how E85 mixed would do for clean burning. Or natural gas. 1 Share this post Link to post Share on other sites
8ntruck 6,421 #4 Posted January 20 Actually, the Sthil engines are 4 stroke. The crankcase is essentally part of the intake manifold. The oil mix in the gas eliminates the need for an oil sump. This design is a result of emission regulations on small engines. I used to run a 60% ethanol, 40% nitromethane, caster oil in my 2 cycle RC racing boat engines. Ran really well. Smelled really neat, too. 1 Share this post Link to post Share on other sites
