The Avadi MA-250 - The internal combustion engine re-imagined.
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- Опубліковано 14 жов 2024
- The team behind the MA 250 see a world with super-efficient lightweight internal combustion powered automobiles. They believe that the ICE is a proven technology that deserves to be bettered. The team has spent years developing a totally new take on the Internal combustion motor. Now there goal is to use there new engine technology to create a family of lighter, smaller, eco-friendly engines that will help to create a cleaner, better world.
So what makes the MA-250 better than a traditional Internal combustion engine? Well lets find out.
#Avadi #ICE #Future
Thank you for sharing our story. In regards to the longevity/durability of the head sealing system.. The engine has run with the current head and seal design for about dozens of hours over probably hundreds of runs over the last two years. The seals are ceramic rings backed up with a thin steel washer, teflon seal, then wave springs. While this design works, the wave springs tend to lose their "springiness" over the course of several heat cycles. We are working on a design which would further remove the wave springs from the combustion event. This is generally the only fail point on the engine. All of the gearing for the con-rods, fixed ring gear, pinion gears, crank weights, bearings, cylinder, shaft etc. have held up wonderfully over many hours of hard dyno-testing. Since the video was released in January we have redesigned the fan and fan housing, which has allowed the engine to stay much cooler. Lots of work to integrate a starter with a smaller flywheel, internal mechanical fuel pump, but those are relatively small projects in relation to what has gone into this so far.
Thanks once more,
-Landon
Thats a very innovative design.
Wishing the team all the best with the project.
The Engine oil is transmission oil too?
Thank you for this project! What are efficient and max RPMs and power output at them?
🤔Cool coil near the fan.
Just a quick note about the yamaha yzf250 engine weight comparison, the transmission of any traditional dirtbike is integrated with the engine making it take up less space vs having the engine separated from the transmission. By comparing the avadi engine to the yzf engine its unfair due to the inclusion of the transmissions weight. If you want a fair comparison, then compare to the weight of a standalone engine like a Tillotson 225 or handicap the avadi engine by adding the weight of transmission to the avadi engine weight.
Trasmision, starter, pinion sprocket, kickstart (if equipped) for sure the yz250f engine is a marvelous high technology engine and is stupid powerful for its size taking in count the behavior of this engine is amazing a lot of power but predictable smoth control
Exactly! And factory race bike 250cc engines are putting HP into the upper 40’s.
Really neat concept though.
This seems to be an ideal engine for an hybrid car. Lightweight, constant speed, always charging a battery.
Pollution ?
@@HenriBourjade If operates a constant speed it can be optimized to reduce emissions
@@HenriBourjademight reduce emissions because it's balanced
This concept adds more complexity, than it avoids.
Some details of this approach have been seen in other approaches, but neither rotating cylinders nor rotating valves made it into mass production or at least mentionable prototypes. Moving masses and building complexity do explode compared to a 2-stroke, even if adding an intake valve system and exhaust/backpressure control.
I'd also say, that friction/lubing and soundness problems will make servicing and lifetime a nightmare.
Too many parts moving !!
It's good for UAVs and other military applications
How do they make piston rings last is my question
@@davidlyda3388i do worry more about the bearings and gears that have to bear the force of the combustion.
LOOKS AMAZING! I just hope it comes to market... and SOON!
The fact that they made the cylinder rotate with the piston is fascinating and way outside the box. I love it.
It add a lot of weight moving...
Friction
It seems like the sealings will wear out roughly twice as fast as the motor is spinning as well...
Maybe they will not. It might not be a problem
I thought about this rotating valve for a while but the traditional poppet valve is better for wear and oil leaks.
sehr interessant und tolle Idee, aber der Wirkungsgrad ist geringer als beim herkömmlichen Hubkolbenmotor aufgrund erhöhter Reibung durch die zahlreichen mechanischen Komponenten. Und bei 1 Zylinder gibt es Vibrationen - vielleicht 2 Zylinder Boxermotor mit Ausgleichswellen.
Super interesting, but with a spinning piston it would probably be better to just have 2 pistons that don't spin, but I guess you could just call that a v twin.
Yeah😂
At 1:35 something explodes. Looks like the dude shorted some of the starter's wiring.
Agreed! Definitely some sparks, probably from a short.
Nothing to see here. 😂
The connecting rods are both rotating AND reciprocating, what do the primary & secondary engine balances look like? Can’t imagine it revs past 5k, good luck scaling larger
To me this engine is very intriguing & extra
intelligently thought out & produced ! Looking forward to seeing numerous power sports vehicles , equipped with this incredible new combustion engine ! Fresh , minamilist, very light & Brilliant 👏 !!!
So your happy to have this 250cc engine in your vehicle that only gives 16hp and is over engineered and complicated than a normal 250 that gives over 42hp, that makes sense😂
No ways, you forgot the Yamaha engine has a clutch and gearbox included... Yes a rotating disc valve is a great idea, 2 strokes used it for years but all those gears sap power and only provide one output speed. It's a nice idea but not a game changer...
ah... first look at this and i couldnt figure out how could be so much lighter for same displacement. i guess drone engine as front of this engine is smaller than standard one.
Now made one of 4 cilinders, I would wonder how do you do an arrange like that, would be interesting, and would be also interesting if you can add a turbo to increase the power.
it seems we get new designs like this all the time, yet they never pan out to become production engines.
anyone remember "the duke" engine? it was a 5 cylinder engine that was supposed to have the power of a 6 cylinder engine, while being as smooth as an electric engine. the ad even had them balancing a coin on the engine. what ever happened to that engine? it was too complicated to manufacture
while this engine is really cool, I don't see them being able to make a production engine that will fill a requirement. the engine will either be too small to be beneficial, or too large to manufacture. the larger you go, the harder it becomes to maintain a seal on the spinning cylinder. metals expand at a percentage rate, yet seals don't scale at a percentage rate. if on a small engine, you need 0.001" of tolerance on a 1" piston, that's doable, but if you have a 2" piston, you still need to maintain that 0.001" of tolerance, making it next to impossible to scale the engine to a larger size.
so you will have a very difficult to manufacture small engine, probably costing around $3000, that you can go to harbor freight and get a similar engine for $300. that cheaper engine will have more parts compatibility as it is based on a Honda engine, so spare parts will be easier, cheaper and more forthcoming, while spare parts for this engine will be the exact opposite, more difficult to find, more expensive, and less options.
Definitely workable, but how this engine could be better than a conventional one is debatable. It definitely has more complexity, replacing the tried and proven crank and connecting rod with two cranks, two connecting rods and some gears. That rotating piston head is similar to the now extinct sleeve-valve technology of WW2, and would likely incur the same disadvantages such as high oil consumption. One on top of the other, I don't think the piston engine as a concept can be improved.
2 cranks would i think make it possible to do much higher revolutions on such engine since forces would balance each other out... i think...
I don't know much about 4 stroke engines, but I do know that with dirt bike tech a 4 valve produces more power than a 2 valve ; Then there's this power valve concept thing ?
Yamaha supposedly came out with a 5 valve per cylinder ?
I'm glad 4 stroke technology has finally eclipsed 2 stroke !
@@rscott2247 Except in really small or really large instances. Handheld equipment is still largely 2 stroke and the largest most powerful engines on the planet are also two stroke (yes, I know they are compression ignition "Diesel" but still).
What about secondary balancing issues?
Compounded friction with cylinder that rotates as piston passes. The valve “plate” also compounds friction as it rotates with constant rotational contact with the “head”.
Oil cleanliness and lubricity become much more critical with all of this additional compounded friction.
That was my valve design idea. The engine oil would need to be injected into and sucked out of the area of below the piston (crankcase) with each stroke to insure cooling and lubrication.
The most important element of this engine is the spinning valve train. Very interesting concept. I suspect it could make variable valve timing simpler.
Not being shitty, legit curious why you think it would make VVT simpler?
@@mechveteran01 just rotate the holes that the intake and exhaust holes line up with. Seems a lot simpler than moving the cam over while it's spinning. Plus you have an infinite number of positions you can rotate to
@@phillies4evaMove cylinder head requires moving head gaskets.
It doesn’t make it simpler it makes it practically impossible. You‘d need to decouple the cylinder head from the cylinder and hook that up to a separate gearbox (ew) to adjust the valve timing. Not to mention you could only adjust timing and not lift, that would necessitate even more insane complexity. People try to act like the modern ICE is so bad and flawed it needs to be re-designed, which is simply not the case.
@@SahnigReingeloetet you just rotate the cylinder head but as pointed out you need a rotatable head gasket which might be impossible or at least very complex. Watching the video again I think it’s somewhat implied that the motor will operate over a pretty limited rev range so variable valve timing is kind of pointless.
Interesting engine, i wonder what the drive train loss would be, looking at all the reduction gear.
Great design exercise. It works, but all those parts moving around may mean high replacement parts.
This is an interesting engine, however, why compare capacity with another engine?. What matters is specific fuel consumption for energy output. I also wonder how well the sealing of the port plate will work. Also wonder about the frictional losses of the double crank. How is the heat dissapated from the rotating port plate ? It might be a good engine to scale up to keep the rotational speed down. Very interested to see further developments and more technical detail.
How many of these have we seen over the years?
Somone has also beenbworking on an oposing 2 piston motor with a simlur desine each piston moves away from the center then back, with a few changes to intake exhaust you can slso add that to a piston chamber in place of valves
You could also turbo charge it for more rpms and higher reves. Your intake could serve as the injection chamber to turn fuel into a vapor
Gas as a vapor burns hoter cleaner and faster, you would have to make this an oil cooled engine. No room for a water based coolent.
Now you add 8 of these that spin for a 16 piston motor assembly.
Nice concept! To enter series, they say a new technology must provide both a 10 % efficiency improvement, and a 10 % production costs savings.
How does this Avadi Idea compares with traditional, reciprocating engines, to Wankel Rotary Combustion Engine?
How are the con-rods and cranck shaft lubricated? Oil should be fed into Engine block passages then to these moving parts.
I don't think this engine will make it to market
I watched a decades old water pump in a pumping station powered by a SINGLE CYLINDER DIESEL ENGINE PUMPING OVER 1,000,000 gallons of water per week.
There is a limit to piston size. How would you connect more than one cylinder? Suddenly, the transmission looks like it just got a whole lot bigger, heavier and more complex.
so as it stands now they would need to double the displacement for same power so it would have the same weight? is it 2 or 4 stroke? not much was said about it... well cars? what about something simpler like professional chainsaws for start... drones maybe?
WOULD BE INTERESTING TO SEE THE WEAR BETWEEN THE CYLINDER WALL AND PISTON RINGS, RING GAPS GETTING LINED UP AND CAUSING BLOWBY MAYBE REDUCED BY PISTON ROTATION WITHIN THE CYLINDER BORE...
The cylinder wall rotates with the piston, the piston has no relative rotation compared to the cylinder wall
Id love to see this as a 2 stroke on a motorbike!!
I think this is certainly an interesting approach. The only real criticism I could offer is that there SEEMS to be a lot of added complexity. And there are certainly easier ways to utilize rotary valves. But, on the flip side. This engine would almost have to be very smooth. Would be interesting to know the internal dimensions.
Lol there are many real criticisms besides mere "complexity" ; )
Why would this engine “have to be smooth”?? It’s a big single cylinder primary force is large and without mitigation that I saw?
@@timduncan8450How does a single cylinder engine run with little vibration in any scenario? This engine doesn't have balancers so most of the vibration on this engine would make the whole thing vibrate back and forth against the crankshaft beating whatever transmission is attached into submission. At least with conventional engines the vibration can be seen in the rotation instead of turning the crankshaft into a hammer drill or jackhammer bit.
I was wondering what the RPMs ramge is
Yes, but the piston is moving at twice the speed of the output shaft and the output shaft would have a maximum rpm of a lawnmower engine. Cut the power claims by 50% on the Avadi, to better represent the actual power output.
Make an oppose piston configuration. Should be even more efficient!
Which type fuel is used in this type of engine and it's more efficient or not ? Comparative other ic engine's
After watching the cutout animation several times I am wondering about what the combustion heat will do to the gears. Longevity is an aspect that needs to be addressed.
Also gears don‘t like to get hot. Metal expands and so the gears would either seize or at least lose sync or change timing.
To be fair, you're not including a transmission you'd need to add to the size and weight of this engine. Also, many trail type bikes that are 250s also put out about 16 hp, so this may not work in a flagship bike, it may fit nicely into something like a TW200 or XT250 as well as ATVs
Would it not just act like a heavier flywheel?
Sure it has its positives and it's really cool but isn't VERY similar
What if you used electronic valves solenoids or design it as a 2stroke system or even di
To be fair... The dirtbike motor is also the transmission included in the weight because they're both in the same case. So eh... 🤷
How's it compare to a 2 stroke also?
Looks like piston side thrust has been eliminated or vastly reduced. Nice design for small, niche, applications as few parts.
Piston side thrust negated... yes.... but instead now its adding a rotational torque on the connecting rods... like hammering on a screw... im not certain that is better.
It is an interesting concept , I totally reliable conventional valve assembly would not detract at all from the rest of this ingenious design, moreover, electro-mechanical valves have been used in diesel engines for well over 40 year ...no reason why they could not be used on this little gem.
lol i wonder what happened @ 1:35 they were working on it then a bunch of sparks flew n they immediately backed off :p
How much cost ?
Rotary Engines originally had sealing problems that had been figured out, l am sure this company will do the same.
Would love to see what comes of this design.
Not to be cynical, but I'll believe it when I see it used in practice.
A lot of moving parts, a lot of moving parts now moving in multiple axes of rotation, etc.
An apposed piston 4 cylinder boxer type would be quite interesting.
This type of engine will not last long
Piston moving in two direction instead of one . Now its moving up and down and rotating at same time which will reduce the life of piston rings, piston and piston glass
It's still a reciprocating piston engine. It still has inertial forces when the piston reverses.
OK, It weighs half of that Yamaha engine, but it only has a third of it's power. Bright new future...
The Yamaha has a 6 speed transmission and a clutch and a water pump.
The British had rotating-sleeve-valve engines in the 1940s.
Sound! What does it sound like? It's important! Jeez...
Before know about avadi engine, i have an imagine how about rotary valve should be work. But damn now its really happened.
А какой ресурс у двигателя?
Wow keep working on improving tech .
I don't see the point of trying to "revolutionise" the interal combustion when the emphasis is to try and eliminate it all together.
That's a bad emphasis. The emphasis should be on creating carbon neutral fuels, such as the green crude oil Sapphire Energy was making 14 years ago before the gas prices dropped again and funding dried up.
Since the algae makes the oil from CO2 in the atmosphere, it is literally carbon neutral-burning it only puts back what you took out of the atmosphere. That way even cargo ships, jets, and trains are don't add excess carbon to the atmosphere, much less cars and trucks.
I mean they were far enough along that really all that was needed was a single gene edit to make the algae "sweat" the oil so energy intensive drying and expression would not be necessary, you'd literally just skim the algae tanks. They were trying to set up a deal with Monsanto to do just that when investment dried up.
Sure, and combine it with the 200 mpg carburettor
It is good to install on Kamikadze drones.
bro really combined driferensial and an engine💀💀
How many power strokes for each revolution of the output shaft?
It depends on gear ratio
Would make a fun go-kart or mini bike engine
All 16hp and that's before you put a gearbox on it that'll soak up even more of the miserable 16hp, yep that'll be fun
the advantages of a boxer engine but with only one cylinder, cool!
2 bánh răng hành tinh quay ngược chiều với nhau, suy ra nó không thể chung 1 trục, nên lá thép ở giữa liên kết với trục đầu ra không thể kết nối với 2 trục của bánh răng hành tinh.
Momen xoắn của trục 2 bánh răng hành tinh vuông góc với momen xoắn lá thép kết nối trục đầu ra,lá thép ở giữa liệu nó có chịu được lực xoắn đó? Giả sử lá thép kết nối với trục đầu ra liên kết vớt 1 trong 2 trục của bánh răng hành tinh thì momen xoắn vẫn phá hủy lẫn nhau ở 1 bên trục bánh răng hành tinh,và trọng tâm quay của nó cũng không đều.
Nếu thay lá thép dày hơn, cho 2 trục của bánh răng hành tinh cùng liên kết có khoảng trống để có thế xoay ngược chiều thì chỉ làm việc phá hủy do momen xoắn vuông góc càng tệ hơn.
There is a reason no one did this before. And it's the same reason this will never reach the market.
The word you are looking for is "conservative". If it sells well, don't change it, keep milking it. If sales decline, remake it.
One of those remakes could be this engine since you can easily argue that the price needs to be very high since it has to be made from some crazy alien metal alloys.
to complicated for too small of an output. a $3000 engine that's replacing a $300 engine.
remember the duke engine?
@Bene Hick Bullshit and misinformation doesnt lead to technological inovation. The laws of physics are above you.
@@cerneysmallenginesbut they can move to Uganda and do it there for just 100$ 😂
what is it then?
16 hp, the Kawasaki KX250 produces 29 hp. Long way to go.
Torque is half in the traditional engine and that is also of interest
How the fluk does a fixed ring gear drive an output shaft,??and thats definitely not shown in this artwork mock up,,plus con rods having to rotate a piston .. those journals are going to run on their edges,,not square to the piston,,
Let's put this thing in a Honda hybrid car and see how it runs. See what kind of power we can get out of it as well as range.
Yes it's lower on power right now, so what ? In later stages of development it'll gain H.P. for sure ! It's much smaller & lighter & has greater torque , an incredible effort by a highly intelligent team 👏 ! You can't remain " Dynosaur", You have to embrace new types of engines that create competition for all consumers , and help fuel an economy ! If you don't want any choices , then good for you , I demand the most competition possible all over the world & twice on Sundays, for my hard earned $$$ !!!
Idea is cool but the problem is the rotating piston
A single piston with twice the parts plus gear reduction is an interesting concept.
Time will tell. Remember when the Wankel rotary was all the rage?
Comparing weights, the Yamaha has a transmission, clutch, and primary drive. I turned the video off as some Engineers like myself will just watch the morning news to hear pure B.S.
Touché, or read the papers
WOW that's so cool! Didn't know you needed to be an engineer to realize that Yamaha uses transmissions, clutches, and primary drives. They must be the only manufacturer that uses these things too huh? Glad to know my Suzuki dirt bike ran on magic! Oh man, my IQ just went over 9000!
It all looks nice..... But show us a running engine, until that moment, they are just nice inventors that like to spend time with a new hobby
Ask and you shall receive. Just added a dyno run to our UA-cam channel.
How is the piston counterweighted?
Piston ICE engines turning generators do not need counterweights making them lights. Better for range extending.
So, you say piston will move up and down and also rotate inside the cylinder.
Does that mean wear and tear increases. Also 1 crown gear and 2 helical gears will add upto the wear and tear.
Also, maintenance will increase with this.
🙄🙄🙄🙄🙄🙄
Try to remake the pulse jet engine
Saying it's simplified but has been made more complicated with more moving parts which in turn cause more wear. What has been doen to avoid or minimize piston skirt wear during the upward and now added rotational force. If there is any failure it doesn't seem like an economic or straightforward fix. Seems to be overengineered.
It's integrated gear reduction is responsible for the greater torque.
Attached to a generator, this could provide back-up power to EVs maybe?
So it's an overly complicated replacement for a convention crank that doesn't have the balancing and side thrust benefits of a rombolic drive, mated to an under developed Aspin rotary valve. Two backwards steps at once....
Great
Similar valving to the german ww2 torpedo v8.
If they just rotate the piston is fine. Rotating the cylinder sleeve with that opening would made it wear worse
Rotating only the piston would cause too much wear on the rings...
I seems to add complexity for no appreciable gain in performance/efficiency.
Fix a swash plate between the connecting rods and the piston instead of rotating the whole thing
ok but even if the engine wheight half, it's still the same displacement for less power. so if you want same power you have to increase displacement thus wheight and size. so i don't think it's really a good alternative. and it seems really not practical to service, it looks like it's sealed.
Hold that rotating mass still by the ends, free the ring gear, and run it as a 2 stroke with ports instead of valves.
Y'all are really overthinking this.
Agreed. A regular portet 2 stroke, with forced induction for scavenging and also just for higher BMEP/torque would be the ideal powerhouse. Lubricated like a 4-stroke, but all the simplicity and significantly increased power to weight ratio from a 2-stroke. Piston ring life and inceased oil consumtion due to the ports has pretty much already been solved, take big marine diesel engines or the achates opposed 2 stroke engine as examples. Most of the time, simple is just best.
Way too much inertia. Those two crankshafts need to change direction twice per cycle, that's twice wasted energy of a normal engine, not to mention that the rotation will have unwanted torque, also wasted energy.
Well you dont seem to know the difference between crankshafts and connecting rods
@@zoggrog8823 thanks for letting me know!
Changing direction doesn't really waste energy (except from friciton and such), all that energy of the deaccelerating piston will go into the crankshaft. But maybe you mean it causes extra unwanted forces and more wear, which would be true.
If it’s got to go up and down before it goes round and round it ain’t going to be a winner….
If the normal motor is twice the weight but your still carrying a 200lb man it doesn't make any difference. I'd rather have twice the power when an extra 25 lbs or whatever it is isn't going to change the power to weight ratio. Plus those gears are a failure point.
Anyone else catch that at 1:34 ? ⚡🧑🔧😂
mouth wide open with amazement!
wow, IM GAY TOO? :0
yooo me too
Same here.
Same here ,too technodude
The rotating valve is a good thing, but the rest is just tooo expensive….
Mouais, le prix doit être à l'avenant vu la complexité de l'ensemble.
Quid de la fiabilité? du rendement? de l'étanchéité? De la consommation?
This would be perfect for a generator, but instead of gasoline, you use hydrogen, then the emissions will be met and the electric produced will drive the vehicle much like a diesel operated train. The diesel engine only spends the generator, but it is Able to pull the entire train, using less fuel than conventional systems
Can't be scaled to larger water cooled engines.
And rotary valves don't seal well.
And simply too late