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

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.

This seems to be an ideal engine for an hybrid car. Lightweight, constant speed, always charging a battery.

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.

At 1:35 something explodes. Looks like the dude shorted some of the starter's wiring.

I thought about this rotating valve for a while but the traditional poppet valve is better for wear and oil leaks.

LOOKS AMAZING! I just hope it comes to market... and SOON!

It seems like the sealings will wear out roughly twice as fast as the motor is spinning as well...

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...

The fact that they made the cylinder rotate with the piston is fascinating and way outside the box. I love it.

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.

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 👏 !!!

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.

The most important element of this engine is the spinning valve train. Very interesting concept. I suspect it could make variable valve timing simpler.

Which type fuel is used in this type of engine and it's more efficient or not ? Comparative other ic engine's

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

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.

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.

Id love to see this as a 2 stroke on a motorbike!!

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.

What if you used electronic valves solenoids or design it as a 2stroke system or even di

Great

Would love to see what comes of this design.

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.

OK, It weighs half of that Yamaha engine, but it only has a third of it's power. Bright new future...

Great design exercise. It works, but all those parts moving around may mean high replacement parts.

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

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.

An apposed piston 4 cylinder boxer type would be quite interesting.

The British had rotating-sleeve-valve engines in the 1940s.

I was wondering what the RPMs ramge is

A single piston with twice the parts plus gear reduction is an interesting concept.

lol i wonder what happened @ 1:35 they were working on it then a bunch of sparks flew n they immediately backed off :p

bro really combined driferensial and an engine💀💀

How many power strokes for each revolution of the output shaft?

Interesting engine, i wonder what the drive train loss would be, looking at all the reduction gear.

Wow keep working on improving tech .

It's still a reciprocating piston engine. It still has inertial forces when the piston reverses.

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.

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.

16 hp, the Kawasaki KX250 produces 29 hp. Long way to go.

Time will tell. Remember when the Wankel rotary was all the rage?

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.

Looks like piston side thrust has been eliminated or vastly reduced. Nice design for small, niche, applications as few parts.

How is the piston counterweighted?

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?

Rotary Engines originally had sealing problems that had been figured out, l am sure this company will do the same.

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.

It is good to install on Kamikadze drones.

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...

Make an oppose piston configuration. Should be even more efficient!

There is a reason no one did this before. And it's the same reason this will never reach the market.

How much cost ?

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

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 make a fun go-kart or mini bike engine

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

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.

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.

А какой ресурс у двигателя?

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.

How many of these have we seen over the years?

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

the advantages of a boxer engine but with only one cylinder, cool!

Before know about avadi engine, i have an imagine how about rotary valve should be work. But damn now its really happened.

Similar valving to the german ww2 torpedo v8.

If it’s got to go up and down before it goes round and round it ain’t going to be a winner….

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.

Sound! What does it sound like? It's important! Jeez...

Sure, and combine it with the 200 mpg carburettor

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.

Not a lot of hosepowa but a lotta toke

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?

Idea is cool but the problem is the rotating piston

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.

Anyone else catch that at 1:34 ? ⚡🧑‍🔧😂

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 $$$ !!!

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.

I don't see the point of trying to "revolutionise" the interal combustion when the emphasis is to try and eliminate it all together.

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....

It's integrated gear reduction is responsible for the greater torque.

If they just rotate the piston is fine. Rotating the cylinder sleeve with that opening would made it wear worse

Try to remake the pulse jet engine

Fix a swash plate between the connecting rods and the piston instead of rotating the whole thing

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.

Attached to a generator, this could provide back-up power to EVs maybe?

I seems to add complexity for no appreciable gain in performance/efficiency.

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. 🙄🙄🙄🙄🙄🙄

Its limited to one cylinder by design

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.

All those extra moving parts.... extra expense, heat, wear...... Good luck!

mouth wide open with amazement!

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?

That would fail in no time Good luck with it

Different doesn't mean better!

The rotating valve is a good thing, but the rest is just tooo expensive….

It would be okay for a 125cc