Posted on 06/10/2024 1:01:18 PM PDT by Red Badger
An innovative new combustion engine eliminates half the guts of a traditional engine, and uses a fascinating internally-rotating piston and sleeve arrangement, making it lighter, simpler and more efficient while still making strong power and torque.
Michael Arsenaeu designed the Avadi engine 20 years ago in the hopes of creating an entirely new engine design to be efficient as well as reduce emissions. In 2015, Avadi began the build and development.
Rotary might be a good name for this sort of engine, if the name wasn't already taken. Everything inside the crankcase rotates, but unlike a Wankel-style rotary engine, this design uses a piston with two connecting rods that have a scissor-like movement attached to pinion gears at the back of the engine.
All of this rotates on a fixed ring gear connected directly to the output shaft. It uses a valve disk that also rotates to complete a four-stroke cycle of intake, compression, combustion, and exhaust as everything rotates internally.
It's dizzying. Check it out:
VIDEO AT LINK......
According to Avadi's website, "two connecting rods and their corresponding pinion gears reside in what we call a 'halfshaft.'... the halfshaft can be likened to the heart of the Avadi design, it is essentially the housing where up-and-down piston motion is translated to rotational motion."
Unlike a Wankel rotary engine, the Avadi eliminates the traditional crankshaft entirely, as the cylinder and piston rotate within the case during its stroke. Everything very much looks and functions like what you'd see in a rear differential – if differentials had pistons connected to planetary gears.
Looking at it in motion does make me wonder if the low mechanical advantage from the connecting rods to the pinion gears might constitute a long-term reliability issue from the torsion factor on a narrow, short stroke.
(Excerpt) Read more at newatlas.com ...
Can you get 650 HP out of it, like a stock 4.4 Liter twin-turbo V8?
Piston engine goes Ping ping ping, but the Mazda goes M-m-m-m-m-m-m.
bump
” Put in trunk of Tesla to recharge it on the road?”
It is an ICE engine. A Tesla will not recharge it.
“It’s little like a Wankel.”
Not even close!
Where’s the plug?
“It looks like a Wankel inside a differential.”
Wankel’s don’t have pistons ...
“Weight is one. I think the article said it weighs around 1/3 of the Honda GX-240 engine used in lawn equipment and has higher output also. “
They fake the numbers. I also don’t believe their 42% efficiency claim.
I don’t either. There’s got to be a ton of friction loss from the the ring and pinion. And since it’s a ring and pinion, you’ve got to run a much heavier lubricant, which can’t be good for what I’m assuming are plain bearings on the con rods.
Man, Mario Faccioli could have used one of these back in the day.
this thing looks incredibly complex and so difficult to repair that it would probably just be cheaper to melt it down and buy a new one ...
I agree. It does not look readily scalable.
There is a recent variant of the Wankel concept that looks very promising. Sorry
...can’t point you to this newer idea.
It’s funny how the old piston and connecting rod concept still thrives after 120 years or so.
Awesome. Some really smart, creative people out there. More power to them.
This big problem that I see are the sliding valve seals. Rotating sleeve seals have always been the Achilles heel of many designs compared to poppet valves in a conventional ICE engine.
Liquid cooling would appear to be a serious challenge, too.
When I first saw this design I thought "the rotating mass will act as a flywheel eliminating the external flywheel." The narrator of this video makes that point.
New Semi Rotary Engine with 2 Connecting Rods 🤯 Avadi MA-250.
“And since it’s a ring and pinion, you’ve got to run a much heavier lubricant”
I think that can be optimized to some degree, both in terms of the lubricant, the gear materials, and the mechanical interface design. Most ring and pinions do operate at relatively low rpm and this will be pushing it.
“When I first saw this design I thought “the rotating mass will act as a flywheel eliminating the external flywheel.””
Is balance / vibration going to be an issue with the reciprocating piston or is it naturally damped out somehow?
Check your link
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