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Take a look at this really amazing engine design
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Posted by: Avena Quaker---------------------
Found this some time ago, seems really cool
http://kugelmotor.peraves.ch/ nothing informative in their website yet, just this schematic movie about the engine operation http://kugelmotor.peraves.ch/Bilder/Kugelmotor_engl.wmv
The engine is spheric, has only 3 moving parts and runs on a 4-stroke cycle, with 16cm of diameter has an effective displacement of 377cc and produces 47 HP
This design appears to actually have been built and run, not like other designs, but I couldn't find much information abot it just some dutch pages (i don't speak dutch doh').
Please take a look at the video, what do you think ? Pretty smart design he !
Posted by: SpeedyManiac---------------------
Looks pretty cool.
Posted by: 02yz426f---------------------
Have you ever seen anything on the 6-stroke engine. Look it up, it really interesting.
Posted by: 76GMC1500---------------------
www.revetec.com actually has working prototypes.
Posted by: Cman250---------------------
six stroke engine...man those things would have to have some monster torrque, but you could probably count the revs in your head even when its at full speed..lol chuga-chuga
Posted by: 76GMC1500---------------------
I've seen 2 6-strokes. One injects water for a second expansion stroke which hardly seems practical. The other is a little more interesting to me. It has a 4-stroke cylinder and bottom end. Instead of a cylinder head and valves, it has a mini 2-stroke cylinder, piston, and crankshaft. The upper crankshaft spins at half the engine speed, just like a 4-stroke camshaft and the piston times the ports just like a 4-stroke camshaft times the valves. It works just like a 4-stroke cycle but has no valves to burn or float and the second piston has some interesting effects on the displacement of the engine. One was built using a Ducatti bottom end and actually ran. One model used a rotary valve to give asymetrical port timing.
On the subject of valve-less 4-stroke cycle engines, there have been several examples of sleeve valve engines over the years. One was in a car built in the 20's or 30's, I can't remember the name. Another was an engine in the Hawker Sea Fury, an airplane built during the late 40's and early 50's. The cylinder liner in the sleeve vale engine has ports like a 2-stroke, but the liner rotates to time the ports so the engine can run on a 4-stroke cycle. Each cylinder has it's on gear train to rotate the cylinder. When you have 18 cylinders in a radial configuration such as in the Sea Fury, things get kind of complicated. My grandpa's friend has one of these Sea Furies. He runs it in the Reno Air Races, it's the Critical Mass. The pilot claims the plane makes 4,400 horsepower.
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