The Achates Opposed Piston Engine: The Only Green Diesel Engine

[@thomadams6671]

First off the Navy has been using OP engines since 1938. It is a great engine to work on and easy to keep operating. At low loads it does collect oil in the air box but that has already been fixed by a return air system that uses already burnt exhaust back for combustion. If I could get a OP engine for a small truck I would get it in a heart beat. PS. The engine timing is adjustable via a vertical drive timing system.

[@justuskid9577]

Its a russian invention and patended

[@Crosshair84]

Don't worry. If these engines do in fact meet the emissions regulations, the EPA will simply tighten the regulations to correct that problem. As they have always done.

[@taylorsutherland6973]

The tiers of emissions allowed are public and not changing. That said I don't agree with them at all. We heave very clean diesel fuel now which is better for the engine. It's just EGR and all the aftertreatment which is disgusting

[@Wingnut353]

@@taylorsutherland6973 public and not changing... thats a lie. They change every 10 years or so. Also this engine dose use EGR and after treatment but it sues a SMALLER lower maintenance version than current engines.... ALL of the maintenane and emissions reductions derive from the engine design other than that the aftertreatment is just a smaller than usual aftertreatmetn system because it has less to deal with from this engine.

[@taylorsutherland6973]

@@Wingnut353 all I meant is that we know what's coming emission wise. Just not necessarily how to meet it.

[@Noooo23523]

@@Wingnut353 bro euro 6 has like 5 versions each 5-10 less co2

[@playronestudios7574]

That forest over there produces CO2... better cut it down. Sorry can’t grow food because it produces CO2. Also stop breathing, like here, put on this mask.

[@samsungtvset3398]

If the two cranks actually rotate in opposite directions that would make for a very smooth idle and low speed running.

[@texasslingleadsomtingwong8751]

That sure seems to be what I'm seeing , no unopposed power stroke .

[@Wingnut353]

That's exactly how it works since they are driven off gears that drive the central flywheel gear.... they have to rotate in opposite directions.

[@porcupinepunch6893]

In the video they are both rotating in the same direction. Kind of disappointing

[@harrymu148]

@@Wingnut353 if you work it out in your head You'll see your mistake.

[@Ratkill9000]

These engines have been in the works for well over 10 years. Why have these not even hit the market yet?

[@dequavisjones4869]

Too fuel efficient, those poor oil tycoons would only have half trillion dollars each if we double our diesel efficiency.

[@Wingnut353]

This problem is even more prevalent in the aero motor industry there have been like 5 different aero diesels that have all been bought and quashed or now cost like 500k etc...

[@lexluthor6906]

getting OEM's to adopt to this technology would cost them millions. they wont until the the emission rules make them change. (thats coming soon)

[@mattdaddy_888]

​@@dequavisjones4869 then why are they pushing electric vehicles wouldn't the oil industries north allow that?

[@fistymopar2356]

If you ever have to ask that question, the answer is always money. It cost too much or interferes with some else's. Look up the fuel atomizer that allowed big engines to get 45 mpg. Shell bought the patent and buried it. It's never been about the environment 😮

[@victorkrivor2174]

ever since seeing the concept of this engine a few years ago, I've always thought about putting the engine into a flat position for passenger cars, such as porsches and other low-slung sedans and coupes. maybe a gasoline version can be made with direct injection and used for even smaller cars, with a single or double piston arrangement

[@davidellis279]

I’m with you on this,I’ve been a diesel engineer for over 50 years and I think without laying this engine horizontally it’s going to use more oil than diesel because being vertical oil from the top crankshaft is going to pour down the bores increasing oil consumption. I’ve heard a lot about this engine and in principle it’s a great idea but not if it’s mounted vertically because of the problems I’ve mentioned,really hope I’m wrong about this but it’s taking a hell of a long time to bring it to Market and cost’s are going up and up with NO returns as yet. The two crankshaft idea is brilliant but NOT for vertical applications, I could be wrong and they think of some way of stopping the oil of draining down the top bore’s but I can’t think of any.

[@victorkrivor2174]

@@davidellis279 I think the main concern with the orientation is that the oil channels for the upper crank are designed to run straight down, and reduce the amount of standing oil in the upper cylinder, but with the boxer/flat design they would likewise have to adjust the oil galley/piston squirter positions because of the iconic bore scoring that so many subarus and 996 porsches had. I think with the little fixes/optimizations, a flat layout would definitely end up consuming less oil than vertical.

[@tjsbbi]

@@davidellis279 The 14.3L military version appears to be horizontal.

[@lexluthor6906]

@@davidellis279 no problems in the vertical position. the reason why most variants are vertical is because it packages into current vehicles without much change.

[@leeknivek]

@@davidellis279 they’ve been using this design vertically since before you were born. They wanted to lay it flat for World War II bombers but actually had oil problems with it then ... had to do it vertically

[@ronnieg6358]

Opposed piston engines don't need two crankshaft's. The TS3 engine had one crankshaft turned by a toggle system and was successfully used in commer trucks in the 50s and 60s . When Chrysler took over they scrapped the idea and destroyed the drawings.

[@stevemanning3230]

I live in a bus with a 1957 ts3 engine. Still does 20mpg!

[@PeterGort]

I think the concern about piston rings travelling over the ports is not the issue you might think. Two stroke Detroit Diesels existed for many decades, and the technology to get long life out of piston port diesels is very mature. What I always wondered was how Achates managed to get such good combustion from peripheral injection, most diesel engine designers try to get the injection as close to the center of the combustion chamber that they can.

[@chadjensenster]

I imagine you could inject on 2 opposing sides of the cylinder. That helps spread the pressure from the burning fuel out and helps give a more even pressure on the piston heads

[@user-lj6gk4lv9s]

Side thrust on power stroke is on the other side of the bore, and lubricants got a lot better since 70's.

[@peterdarcy8871]

as to the rings two strokes have been running there rings over ports forever no problems yes a little more wear the problem is , heat , the old detroit two stroke diesels cyl ports were the intake ports keeping excessive heat away from rings piston skirt ect , if they reversed the in,ex so as the exhaust didn't go out the valves but out the ports at bottom of bore the amount of heat would cause the oil residue between rings,bore to evaporate used as fuel , hence scuffing that would be catastrophic like not putting oil in your chainsaw , the lubricating oil film which in these eng is miniscule as compression rings almost never see a part of the bore which has had oil on it , which is how normal 4st eng lubricates its compretion rings . So all opposed piston engines suffer this problem scuffing of bore rings piston on the exhaust side of eng , they only refer to it as excessive heat can't put oil in fuel like chainsaw as this is injected oil is fuel , answer is to allow the oil rings on very bottom of piston to fail just a little , the uppermost part of the bore swept by oil rings is also swept by the compression rings so they see a little oil residue, lubrication . this is the reason all opposed piston eng leave a smoke trail, side injection is a cause for pore combustion though this is able to be overcome l believe swirl, tumble ect egg shaped chamber . So were does this leave Achates how many dollars how much time shit load of patents very quiet no product yet not for the roads . army doesn't care for pollution regs. There we have it , thanks P D'Arcy

[@lexluthor6906]

@@chadjensenster they do inject from both sides

they have some "fancy" surface on the pistons opposing each other creating vortecies tumbling the mixture so the fuel burns completely

[@michaelfoort2592]

I'm curious to know how the crankshaft connections hold up over time

[@doogie525]

Those "electric is the future" people are stupid. Electric grid can't handle current use and no steps are being taken to improve the grid. Innovation in the internal combustion engine like these opposed cylinder engines are the future. Good video. I enjoyed watching

[@idiotluggage]

Your video clip of heavy equipment moving coal and saying that they use gasoline engines may be a bit off. When I visited a coal mining operation in the mid 90's I was told that they use electric engine to help prevent sparks from igniting the coal. This is very fascinating. Thanks for sharing.

[@Wingnut353]

Yeah there are some huge trucks like that that save a massive amount of fuel as they generate power returning down into the mine and use it again going back up... basically a perfect application for a hybrid or EV.

[@TruckMechaAddicted]

Is this time of engine (both in a vertically and flat position) smaller than a common piston engine?

[@danmaycock9238]

Give the Leyland L60 a listen, sounds beasty!!

[@MrSlyFox]

Huh. The L60 is usually pretty quiet tho...

[@detroitgarage9430]

I'd love to have the 2.7 LTR diesel version in my F350.:) I'm running a Detroit 4-53T that's two stroke, but not near as efficient as the Achates.:)

[@Wingnut353]

The 3 cylinder does have the 2 stroke sound doesn't it they should probably build a 4 cylinder for an F350 sized truck.

[@detroitgarage9430]

@@Wingnut353 From what I've read the 3 cylinder is a better fit for scavenging over the 4 cylinder. That's why they've built the 2.7 and 10 LTR in 3 cylinders. The 4 cylinder that is built under license by Cummins is 14.3 LTRS and built for military use. I don't think the military engines have to adhere to the EPA regulations. Very nice engines.:)

[@jlo13800]

How about a 1700 rotax OP 2 stroke made from 2 850 rotax etec's turbo. this would make one sick trail OP 2 stroke sled.

[@jlo13800]

@@Wingnut353 Nice i got a 8v92 detroit 2 stroke turbo, nice engine and a small block 4l johnson v8 side oiler outboad.

[@detroitgarage9430]

@@jlo13800 That it would.:)

[@NN1Ckl.]

How would it perform under engine-braking conditions on a modest to heavy grade?

[@Wingnut353]

That's an interesting question... since it doesn't have valves there is no way to implement conventional engine braking other than just turning off fuel.... a hybrid flywheel generator might make a lot of sense due to the fact that it has that huge flywheel gear in there anyway. I bought a little honda insight recently and it has extremely good engine braking.... about 10-15kw worth on a 60HP engine, probably more could be achieved in a modern design. And the flywheel on the insight is smaller than a 270hp engine would have. The insight is also the only vehicle I have ever driven with auto stop... that I actually like the feature... pop it out of gear, engine turns off, put it back in gear and its running again immediately, this even reduces wear on the throw out bearing in the transmission since the engine just stops even before you have a chance to let the clutch back out.

[@taylorsutherland6973]

All the alphabet soup of aftertreatment is what is killing the diesel market. However, the opposed piston diesel is a really cool concept. I wish the poweres that be would just be satisfied with its overall efficiency and out of the engine emissions without EGR especially.

[@Wingnut353]

You can't avoid the aftertreatment under CARB... that said this engine probably would require little to no after threatment elsewhere. Even under carb it has a reduced size after treatment system reative to the engines it is replacing it also is designed to reduce DEF use.

[@kurtminges647]

Walmart has one of these engines in one of their big rigs they're trying it out for almost a year now

[@ianmarshall170]

Very similar to the old Comma knocker which only had one crankshaft!

[@Wingnut353]

The difference here is that there are fewer complicated parts, and instead just two crankshafts its much more elegant in design.

[@ianmarshall170]

@@Wingnut353 maybe but the comma was a more compact design & it could run horizontally making it easier to install with a lower centre of gravity.

[@ferrumignis]

@@Wingnut353 The Commer engine just had large rocker arms to transmit piston motion, it was hardly "complex".

[@eifionjones559]

shades of the old Doxford marine engines

[@sskuk1095]

One question: Why are opposed piston engines usually vertical and not horizontal, since it would make them flater?

[@a64738]

Horizontal engines like Subaru and Porsche boxter engines have problems with cylinder wear being uneven due to gravity.

[@jimj2683]

What is most efficient as a range extender running at a fixed rpm? The opposed piston engine or the rotary engine?

[@lauramildon-clews7850]

I have been a marine engineer for over fifty years. I have worked on opposed piston engines a lot. They were common in marine applications. They didn't give many problems at all. The biggest problem was the cost of manufacture. From an operational standpoint they are far more efficient than a conventional two or four stroke diesel engine. As for complexity, I have come across far more conventional engines that are far more complex and nowhere near as efficient

[@lauramildon-clews7850]

One more point to consider, The Roots Group, part of Chrysler had an opposed piston diesel in the 1950s.This engine only had one crankshaft. It used what looked like large rocker arms to connect to the crankshaft. The engine was made in Grt Brittain. It was called a Commer TS3. It was used in trucks till the early 1960s. Chrysler canned the engine and stopped producing it when they took over the Roots Group

[@ivancounsell4077]

A very old design, Tilling Stevens TS3 fitted to Commer trucks, Sauer of Germany... this list goes on...

[@somenygaard]

Can you imagine the amazing engines we would have if the eco-warriors were just ignored. They have spent the last 6 decades or so moving from on imminent civilization collapse prediction to the next. Too hot, too cold, changing climate, overpopulation and starvation, AIDS , Acid Rain, Nuclear Power Plant accident predictions ……

[@uttarmanshrestha3389]

Arrangement for lubrication, for cylinder liners and cranks may be complex, If piston tops and liners are coated with suitable ceramics such as zirconia,the thermal efficiency may be enhanced more,

[@thisguy6559]

Can they make a gas-powered, horizontal version, with the output shaft in the center, so I can put it in a Subaru?

[@johnbodnar3720]

Hi, you didn't give fuel consumption on truck, I would like to know. This is the tech we need between fuel and electric cars. As you said commercial vehicles is a problem at moment, thanks

[@Wingnut353]

The f150 conversion was said to get 37mpg without a hybrid system.... with a hybrid system it cloud probably push up into the 40s.

[@kurtminges647]

why aren't these in hybrid cars

[@shubhbhatu8664]

So now , as we can see the hyperthreading is for engines also.

[@trevortrevortsr2]

When these engines start to wear they will let crank oil up past the rings into the exhaust ports

[@jamest.5001]

Imagine a 12 piston Cummings 6.7L 12 piston engine, 2stroke, with turbos! 😆 Or a larger road tractor engine, 15L or so, maybe a V8 opposed piston engine, haha!!

[@VHP7044]

Check out the Cummins combat engine

[@Wingnut353]

@@VHP7044 Yep, the ACE engine is an achates derived design, 1000hp our of an inverted boxer 4 cylinder 8 piston engine. And it is significantly smaller than the engine it is replacing.

[@jlo13800]

Here is your brand new cummins ACE OP 21 stroke: mart.cummins.com/imagelibrary/data/assetfiles/0058689.pdf

[@jlo13800]

Oops 2 stroke!

[@fistymopar2356]

I'm salivating at the thought of a bigger more powerful Cummins!

[@johnmartin3517]

Why don,t they have a 1.35 liter achates engine?

[@farmer87yj]

please do a video like this for alfadan engines

[@AmandaVanDenBergh-m2s]

Awsome

[@yodasbff3395]

Very interesting engine. 👍

[@Chumblybum]

Where are the exhaust gasses going - sorry I’m an idiot I’ve missed something

[@levidasims4147]

I also tried to contact them about a possible engine purchase and was also ignored

[@Wingnut353]

They are essentially a military contractor at this point... it will take a CARB or EPA mandate to get these engines onto consumer assembly lines. the military contractor money is quite good for little effort and allows them to continue in R&D mode as long as possible before going up against competing designs... honestly if it were my company that isn't how I would run it though.

[@frederickbowdler8169]

All engines have certainly lowered emmisions and raised efficiency over last thirty years and Achates will have to have something really special to compete in this difficult market.

[@Hogger280]

Fairbanks Morse in the U.S. also developed before WWII

[@majorchungus]

Commercial EVs would do well with Bettery Swapping. A diesel truck takes like 15 minutes to fill those big tanks. If a EV truck like the Tesla Semi could swap the battery in 2 minutes, it would actually be advantageous to drive ev over diesel.

[@TattleDelta]

Achate's Engine may be in the new M1 AbramsX.

[@jerrywatson1958]

Will this engine run on hydrogen gas? It looks great for trucks and trains maybe. It's the fuel sources we have problems with when it comes to ICE engines.

[@Wingnut353]

Hydrogen is a very pool fuel...The university of illinois has a biofuel producing supercrop (search for petross) is what I think is the most practical answer. Just run biodiesel and genetically modify existing plants to our advantage, they already have a strain of sugarcane that makes oil in the leaves and stem (10x the oil of soy in the current generation, targeting 16x in the future), and it also makes double the sugar as corn per acre at the same time 30% more sugar than unmodified sugar cane! In addtion to that they have made it grow across a wider climate region and in worse soils as well. Also gasoline engines in Brazil are already running on 100% ethanol its legally required there.... they just need to implement the same relatively minor modifications here, Flex fuel engines in teh USA can already run on 50% ethanol the max allowed percent for e85.

[@jlo13800]

@@Wingnut353 yerah about time for 2 stroke to make a come back as the 4 joke stroke has done its time already. yes ethanol/propanol is a much better fuel than h2. but overunity space aertheic ZPE powered motor/generators such as Bruce Depalmas homopolar overunity motor/generator or something like it will be the ticket. i just dont see the obsession with chemical fuels and batteries though.

[@somenygaard]

Hydrogen isn’t really a viable fuel to burn. Hydrogen fuel cells are much more efficient and could potentially be reasonably efficient options.

[@murmaider2]

We haven't heard from this company in 4 years now. I'm sure the battery/EV interests want it shut down. Can't have a fuel efficient and reliable mode of transportation.

[@Naferner_Said]

every petrol engine on the planet is green.

[@thedroplett214]

canțt be made an engine like this with 120hp? seriously 1,9 tdi equivalent would be great.

[@Wingnut353]

It can, but it wouldn't be quite as efficient... since the large cylinders and hence only 3 of them are part of why it is more efficient... large cylinders are inherently more efficient than small ones since the ratio of cylinder wall to volume becomes more favorable. Even a tiny 1L 100hp version would be quite nice to have for small cars + a hybrid system it should be quite peppy and get excelent mileage.

[@bradkaberline5828]

That engine would be complex to fix or even build one side go's out of timing means the destruction of the whole engine plus 2 shafts means 2 timing belts and twice the problems look at every thing you'd have to take off just to work on it. The Vblock does the same thing with 1 shaft and 1 timing. Just blowing one cylinder on this engine would damage both sides and all that stuff on top a nightmare to even work on. Electric motors burn up if they get to hot

[@davidellis279]

Sorry to burst your bubble but there’s no timing BELTS on these engines they very sensibly use timing gears like we did in the olden days thank God.

[@bradkaberline5828]

@@davidellis279 no bubbles burst here man lol just talking the dynamics or future problems I'd see that's all you OK man did I offended you in some way I like the Detroit and Caterpillar motors is that OK with ya

[@lexluthor6906]

@@bradkaberline5828 it's actually very simple to work on. the most complex system being the air system

[@bradkaberline5828]

@@lexluthor6906 the thing about this motor is the block and cylinder is like a punching bag or in a way like put two horses one in front the other in the lead horse is doing most the work and going to wear out faster were as the vtwin motor distributes the work like a side by side horse if that makes sense one cylinder with 2 pistons that cylinder is going to wear out faster and if one ring goes bad the whole cylinder loses compression on both pistols so lose of compression in 2 cylinder if that makes sense

[@bradkaberline5828]

@@lexluthor6906 know it going to take more combustion just to move 2 pistols in which case burning more fuel faster if that makes sense even with a straight inline works better because one cylinder beefed up and one piston beefed up or made like heavy duty would still take less combustion to move the piston in the cylinder

[@jakezgab8576]

Chris, what if I tell u achates is not the only efficient Diesel engine architecture out there.

[@lexluthor6906]

its the only one driving around in trucks, shattering records and already surpassing future emission standards

[@mrpicky1868]

oh right. didn't think about piston passing ports issue. how bad is it? maybe if they come up with design that makes changing rings relatively easy it will not be such a problem?

[@ferrumignis]

It's absolutely fine, there is plenty of material between the ports to supprt the rings, it's not like a two stroke motorcycle engine with one huge port that the ring can bulge out into. The old two stroke Detroit diesels had exhaust ports in the cylinders and were very reliable.

[@inso5078]

"15 kilometers on a litre" what kind of unit is that? The correct or at least the usual way of stating fuel consumption would be 6.7l/100 km

[@ChrisVSCars]

Remember "usual" depends on where you live

[@gregnash7918]

Plasma coat the cylinder walls, outer edge of rings ,and piston. Yes it's very expensive but after you should get a mega hour workhorse engine. VAG Did it with the twin turbo V-10 TDI. If r recall correctly ( I may be wrong) the v10 Power Plant would out last the body of the touareg. I owned a 2004 v10. Longest ever for one of my rides. Amazing power but more than that after 178,000 miles it still made rated power. And still did 27mpg. I regret trading it in still tonight. My bad . Plasma coating the cylenders, rings , pistons is the answer. Yes I know VAG only plasma coated the cylender walls but the rest will make a million mile/KLM engine. Costs money too make . Greg fall city. Wa USA. Ps. The V-10 2004 WAS BREATH TAKING. IF YOU CAN FIND ONE FOR SALE BUY IT. G

[@Wingnut353]

That is essentially how most aluminum block engines are processed today ... and how a low grad aluminum honda engine can last for 300k miles without a sweat. Also these engines appear to have sleeves just like old detroits so you replace the sleeves and you expensive engine keeps kicking for another 500k miles.

[@TheBlibo]

Hi Yes heard a lot of noise about opposed piston diesels over the last 18 months and while they are a little more efficient they still don't address emissions output As all of the emissions control you mentioned is just normal post engine control, not a major breakthrough in not generating pollution in the first place Don't get me wrong I am a piston head but as you said the tech ain't new and still suffers the same inherent problems of any diesel engine, what is needed is a combustion system / cycle / engine that is better than 60% efficient thermodynamicaly while producing 50% lower raw emissions than current technologies which automotively speaking are quite awful. You only have to look at vehicle fuel consumption vs emissions over the last 20.years to see that very little improvement has been made. In my opinion the design criteria should be make it use as little fuel as possible and then design an exhaust after treatment system to work with that rather than what we have today must run lambda 1 then the cat will work Sorry rant over Just pissed off with government passing down my back telling me its raining

[@Wingnut353]

I gotta say ... you are completely wrong about this engine. It is significantly cleaner than current diesels... and the reason being is the double piston design has double the expansion ratio of a normal engine and thus extracts more heat before the next cycle. Also the reduction in emissions are NOT derived from the post processing... this engine has LESS post processing than current engines and in fact cuts down on DEF use. This engine absically did exactly what you said in your last paragraph.

[@iancormie9916]

8

[@philipfreeman72]

I think if you add HHO the engine wont need supercharging .

[@briananderson1781]

Achates did not develop the OP engine, been around for over a century, so why did Achates fall off the radar if things are so great? There is benefits to the OP design but the 2 cycle ported cylinder has been problems for several companies in the past. Why not an L-type head 4 cycle OP engine similar to turning two flat head blocks together with a spacer? Seen it done with lawn mower engines and it works........

[@tinsmith4540]

Have a look at the commer ts3 - one crankshaft,three cylinder, six opposed pistons, supercharger, built in the 1950s by the rootes group in the UK, taken over by the Chrysler Corp who promptly killed it because it was more efficient and cleaner than the engine they had developed costing billions.

[@ChrisVSCars]

Will do thanks😁

[@Wingnut353]

On the other hand the commer knocker is inferior to the achates engine because its too complicated.... one of the main advantages of the achates engine is that it is super simple with any complexity focused into a few small areas like (preventing oil consumption) and modulating intake pressure with the turbo.

[@lexluthor6906]

the commer had 2 major drawbacks. one being the main bearing on the rocker. they were only running about 100bar peak cylinder pressure, achates is running 220. the 2nd limitation is the serious limitation on the bore to stroke. the main reason for superior scavenging of the opposed piston is the ability to achieve very long bore to stroke ratios and still maintain acceptable mean piston speeds.

[@kurtminges647]

And maybe they can utilize a reed valve to keep the air and gas going in One Direction

[@brianshields7137]

Lister of England invented these type of engines in the 1940s were used in trucks buses and boats submarines the biggest was 16 cylinder 32 pistons

[@kurtminges647]

They need to invent the rolling piston ring instead of the scraping horsepower robbing piston ring we have now

[@JohnDoe-yq9ml]

Cmon man, give me a shout out. I’m always first always liking and commenting for the algorithm.

[@uttarmanshrestha3389]

The OPOC engine should be in flat position, The overall efficiency must be higher then the existing versions

[@rh1960]

Could they use hydrogen as fuel and completely eliminate emissions?????

[@Wingnut353]

Hydrogen doesn't eliminate emissions... thats just propaganda. If you put air and hydrogen in a cylinder and burn it you are still going to get NOX. This engine does an extremely good job of nearly eliminating NOX, and allows the use of the most convenient fuel type... even if you are talking biofuels diesel is where it is at alone with sugar cane ethanol. University of Illinois has a combined GMO crop that produces 16x more oil than soy per acre and double the ethanol of corn and has a wider growing range meaning it can be used in poor non food crop soils! I've read that they are trailing this in brazil so they can reduce Soy crops and increase biofuel production (they are already at 43-50% biofuel for thier entire fleet!)

[@rh1960]

@@Wingnut353 sounds like propaganda against hydrogen to me too.

[@THEScottCampbell]

165 cubic inches, 480 ft. lbs. of TORQUE! You could tow a HOUSE!

[@lexluthor6906]

even better is the flat torque curve. some of their engines reach max torque as low as 1200 rpm and carries that max torque all the way up to 2400.

[@somenygaard]

Provided it was a child’s playhouse.

[@iancormie9916]

Opposed piston engines have been around for decades in a vaiety of applications - so why have existing transport engine manufacturers bypassed this tech? Detroit diesels (Green Leakers) had and jave a loyap following so this would have been a logical next step. An extra crank compared to to a head, cams and valvetrain would seem to be a viable alternative. It cannot simply be a case of "not our idea".

[@jamest.5001]

The future is gas/diesel-electric like locomotive engines, maybe add batteries!!

[@brassassmonkey]

I think the current authorities are focused on getting rid of that too. Likely strictly BEVs theyll allow. They have not given FCEVs an oppurtunity in the US.

[@Wingnut353]

@@jadenspires1891 Peopl like that and are single solution driven... rather than seeing the big picture and leveraging all soltions in the right places or better yet in an organic manner. Hybrid vehicles are actually not a very effective solution unless you are a trash truck or mail carrier... etc... those same vehicles would acutally often be better served by a light hybrid or a hybridized full EV. Rather than the common today mild hybrid.

[@jlo13800]

How about overunity homopolar motor/generators that tap spave aetheric ZPE energy available anywhere in the universe. i cupe or the volvume of a 250 CC 2 stroke is enough to boil all the worlds oceans. Bruce Depalma, T Henry Moray, Nickola Tesla and many others are aware of the spuendouse energy density. IUt drives and makes up all the crarged particles that make everthing up. No battries or chemical fuels requaired if it stops getting supressed. I like my ICE 2 stroke and amsoil interceptor 2 stroke oil, i bought a few gallons for my detroit v8 2 stroke.

[@Christoph1888]

These guys have been around for a very long time with little commercial fruit and no independent testing as far as I'm aware ?

[@Wingnut353]

Cummins licensed the designs for the ACE Advanced Combat engine... and the military is buying those. As far as I can tell its been quite sucessful in testing. Walmart and Tyson have been testing a version of the achates engine also... and it will have to go into production by 2027.

[@lexluthor6906]

argon national labs and cummins motors.

[@Helmut-pdh]

3:15 We don’t use km/l in the rest of the world, we use l/100km

[@deepblueskyshine]

Old soviet tanks made in Ukraine run on horizontally placed 5-cylinder Jumo (b.t.w. Jumo is a german name so Ju reads U as the english word you - the whole name sounds youmo) aviation diesel derivate from 1964 (T-64 and all its modifications) and newer on 6-cylinder from 1984 onwards (T-80BV - the ones that gunned down the last and the only almost freely elected soviet parliament and mr. Eltsin gave a speach to the protesters atop of one of them, T-84 and its newer export variants) and for nearly 60 years of use in these tanks and other heavy vehicles no one have suspected or noticed in use practice two stroke diesels to be more ecological than regular 4 stroke diesels (the tendency is just the opposite) - it's all in the attached bells and whistles. What opposing pistons engines do is giving better power to weight and power to engine volume ratios, but compared to the 4-stroke diesels of equal power output the 2-stroke ones have less torque (which in case of the diesels ain't necessarily bad). In case that power to weight and volume ratio is not enough there's also the delta diesel engine - three such an opposing pistons cylinders in a single plane triangle configuration pushing three crank shafts in triangle's vertecies and whatever number of such planes designers find appropriate to the need that push railway locomotives and ships since after the second world war. Both opposing pistons and delta diesels are also widely used in marine application.

[@Wingnut353]

Less torque isn't true... if all else is held equal for the same engine volume a 2 stroke has double the torque because it has torque pulses twice as often.

[@deepblueskyshine]

@@Wingnut353 You are a bit mistaken - what you mean is what you call power output. It's more intuitively understandable in other languages in which torque sounds literally backtranslated to English as rotating momentum. Simply explained it's the vector of the peak momentary force the engine produces on the surface of its output shaft so if the equal force in the opposite direction is applied the rotation will stop completely.

[@jlo13800]

@@Wingnut353 Yes 2 strokes are torquey,brapppp.

[@stevehayward1854]

Still burns stuff very inefficiently.

[@MarkWright1963]

This design goes back decades it’s not a new idea. Oh and hydrogen id the future.

[@Wingnut353]

Hydrogen is a dead end... its a poor density fuel and has terrible characteristics. Inexpensive biofuels are the best way forward as they can capture carbon and grow the fuel at the same time.

[@somenygaard]

Burning hydrogen in an ICE isn’t going to be a viable solution. Hydrogens only current possible pathway to market is in the form of hydrogen fuel cells.

[@IssacSmith-z6y]

Deutz advertised clean diesel back in 1945 orbsomething

[@joemaxey902]

Deltic engine was phased out by conventional diesel engines . They won't be back .

[@justuskid9577]

Russian invemted it and holds patent

[@cliffmorgan31]

If it has to have all those downstream emissions treatments, I don’t want it. More crap to go wrong…

[@JohnDoe-yq9ml]

First again.

[@jamesaucutt8284]

Those engines are annoying they make too much noise Walmart was trying out a truck with that engine and nobody wanted to drive it because it was too loud and they had three or four fire extinguishers under the hood that will tell me there is a high risk of a fire I truly don’t trust that engine for that reason let alone the sound of it is awful it sounds like several gears grinding

[@hg2.]

Too much accent. Please have a version where MS Word reads the text.

[@davepb5798]

Supercharger? Scavenge blower.

[@Wingnut353]

It uses an 2 speed eaton R900 supercharger.... Eaton calls it a supercharger end of story. Super charger is a type of blower. If you want to be ultra pedantic... the engine has 2 blowers, a turbocharger and a centrifugal supercharger both are blowers.

[@davepb5798]

@@Wingnut353 They're both pumps, but they do different jobs.

[@SteveStowell]

The author of video is lost

[@ChrisVSCars]

?

[@fcarstens6161]

Yes, mate...I kinda think you're the lost one here...maybe cut down on the fentanyl a bit...

[@ml.2770]

fUtUrE iS eLeCtRiC! 🤣