🔴 All about 2 Stroke Diesel Engines and how they work in 3D Animation.

In this video we analyze the 2-stroke diesel engine with 3D animations and we define why they are so good.
#2stroke #diesel #power #repariman22 #turbo #supercharger #speed #rpm #pistons #engine #3d #horsepower #torque #2strokes #cars #car #truck #detroit #detroitdiesel #twostroke

[@jaredkennedy6576]

The valves on ship engines are also not run by a traditional camshaft. They are actuated hydraulically, so the timing of when they open and close can be varied quite widely.

[@richardounjian9270]

Detroit Diesel overcame the high rpm issue through a blower bypass. When the turbo exceeded the blower, the bypass valves opened and the excess air "bypassed" the blower. Those two stroke Detroit Diesel engines where a remarkable engineering feat

[@amsterob]

edit again, were a remarkable.

[@leafevergreen8919]

I am in school for diesel mechanics and got SO EXCITED learning about those two stroke diesels. Literally amazing, I want to work on a big ship with some two strokes. They’re a marvel to me

[@boesie6657]

A 4 stroke and a 2stroke engine runs the same crank speed. It just sound like it's revving higher because everytime the piston is on tdc it fires where in a 4 stroke every second time it gets to tdc

[@ogreunderbridge5204]

As the US truck repairman said, a Detroit 2-stroke Diesel is the most effective machine ever invented, to convert fuel into noise. That aside, our old 2-stroke boat diesels had low rev, low HP, high torque momentum and very low fuel consumption. I´d love to have one in tip top shape to run my electric generator and my air compressor.

[@johnslugger]

I was an engine machinist for 45 years and worked on hundreds of engine types. I think nothing had more potential than the super simple two stroke Turbo Diesel Engine. Light weight, simple and powerful and could go 600,000 miles before needing to be rebuilt. The power to weight ratio could not be beaten since it fired the piston on every stoke giving a V8 the same power as a V12 had so they could be built smaller too! With modern materials and engineering I hope it makes a come back. This engine was mainly used in older buses and trucks and was made illegal since people hated that massive puff of black-smoke they made during take-off. That could have been easily fixed today by leaning out the fuel-air ratio during idling, using an electric power turbo charger made of all plastic parts with a computer which they did not have back in the 1970's when they were slated to be phased out. Very Sad Death of a fabulous and forgotten engine technology just waiting to be rediscovered and fixed in this modern age..

[@Sammyboy1335]

Or with a vacuum system?

[@raygale4198]

Your statement about the blower affecting efficiency of turbo engines at high loads was addressed by General Motors in the late 1980's with their TIBB option on engines. TIBB being Turbo charged, Inter cooled, Blower Bypass. A boost pressure operated flap valve mounted on modified blowers opens at high boost and air flows around the blower lobes. It made a very measurable improvement to engine power and efficiency. Great Vid

[@icenijohn2]

Detroit also offered this on some of their engines. My bus's 6V92TAC has a bypass scavenge blower, so some of the turbo's output will bypass the blower's lobes at higher RPMs.

[@raygale4198]

@@icenijohn2 Yes they sure did, 92 series in high output spec had it. Old Detroits were amazing engines, the factory performance options would easily double the power output of a standard Natural engine. Just keep bolting on bigger injectors, charge air inter and after coolers, fuel coolers, high speed blower drives, bigger turbos. The most efficient engine ever developed for turning diesel fuel into noise.

[@catinthehat5140]

Your 3D animation skills are really good

[@ThenotMrNiceGuy0109]

This video is so underrated. Thank you for improving my understanding on these engine desighs! Cheers from Canada

[@Team-fabulous]

Back in the day I drove a Terex dump truck in a quarry. It had a 14ltr two stroke detroit diesel which had a fantastic whine...

[@k-getrengganis7401]

Nice video chap👍🏽 But, at 3:24 you said that "You can't use a turbo without a blower because the turbo doesn't spin at low revs..." EMD found's way to overcome this, by clutching the turbo so it has low speed and high speed settings so as to keep power and torque as well as lowering the low rev emissions.

[@JWQweqOPDH]

You're saying it functions as a centrifugal supercharger at low RPM, and then disengages a clutch and functions as a turbocharger at high RPM?

[@TheBlibo]

Just a detail Having worked on 2 stroke diesels both opposed piston and valved the exhaust valves open before the piston uncovers the inlet ports so as to allow the residual pressure in the cylinder to blow down and the valves are shut before the piston has recovered the ports Great vid

[@danielphillips1094]

Funny enough the whole reason I just watched this was because I had the question of valve timing. This makes a lot of sense.

[@brianb-p6586]

True - an advantage of using cam-driven valves in a 2-stroke (instead of the simpler piston-controlled port) is the ability to offset the exhaust timing from the intake timing, without resorting to opposed pistons running out of phase. Another advantage of handling one side (normally exhaust) with valves is that it provides uniflow scavenging... again without resorting to opposed pistons.

[@billberg1264]

@@brianb-p6586 Couldn't the exhaust port just be positioned somewhat ahead of the intake port, so the piston uncovers it slightly earlier?

[@brianb-p6586]

@billberg1264 without either a cam or offset in piston timing, if the exhaust opens earlier it also closes later by the same amount.

[@HEHE-dx9og]

WOW, I have been working on engines for a long time and have never seen anything like that Deltic. Really cool stuff. Nice video. Thanks.

[@partymanau]

Nothing like the wail of a Detroit howling at the universe.

[@mikevolante7663]

The Deltics were brill. The sound was unique, could identify them long before you saw them coming. Those Locos did more than 2 million miles at 3300hp.

[@thomasstorbugt6829]

I sailed on one of the maersk tripple e's (sencond gen) shown in the video. At start up , it could run 23 rpm. It sounded like african drums. It was awesome. When doing 73 rpm though, everything shaked. It was also with electronical/hydraulic activation of exhaust valves. And we could completely disengage a cylinder

[@marcob4630]

Opposed pistons are by far the best solution!

[@billberg1264]

There's definitely an elegant simplicity in the design.

[@marcob4630]

@@billberg1264 also in efficiency!

[@sciencegeekgrandpa8]

Great explanations! Keep up the good work!

[@MK-of7qw]

Fairbanks-Morse used to make a locomotive with an opposed piston diesel.

[@brianb-p6586]

They started with stationary engines, and made engines for much more than locomotives... but yes, they were known for their opposed-piston diesels.

[@catmate8358]

That locomotive engine... It looks crazy... :)

[@sczcz1625]

I really like these videos. Thanks!

[@robertedwards7695]

Extremely interesting! Thx for upload. 😊.

[@WorivpuqloDMogh]

Opposed piston is insanely efficient

[@g8ymw]

You only have to compare the Deltic with the Class 37 locomotive (Both built by English Electric) Class 37 1750hp, V12, 4-stroke, 850rpm Class 55, 3300hp, Two 18 cylinder Napier Deltic engines, 1500rpm Both weigh about the same Another interesting point, on fast patrol boats, Deltics replaced RR Merlin engines

[@CATASTEROID934]

@@g8ymw IIRC the Deltic and related opposed-piston multi-banks were developed for motor torpedo boats and other light craft, being thin-skinned the difference in fire risk between German-manufactured E boats using diesel powerplants and petrol powerplants used by British equivalents was significant, ironically the Deltic was developed from Junkers Jumo 204 licensed produced by Napier as the Culverin. What I didn't previously know was that Napier continued their R&D into stupendously powerful turbo-compounds after the Nomad was dropped and mated a Deltic to an axial compressor and gas turbine as a gas generator to produce some ridiculous >5000bhp figure before failing, though it didn't have the fearsome gnashing gearbox linking the gas turbine to the piston pack.

[@PaulG.x]

From 1:32 to 2:05 the video shows clearly that in a uniflow scavenged two stroke the "supercharger" is not supercharging the cylinder - because the exhaust port is open and pressure will be only slightly above atmospheric pressure. The blower is actually a scavenge pump and not a supercharger , and should be referred to as such. 2:10 Gasoline two strokes can also use uniflow scavenging. There is nothing about using gasoline as fuel that prevents it. The reason they don't is that crankcase pumping is far cheaper and lighter than fitting a blower and direct injection to something like a line trimmer or chainsaw.

[@fexploder3281]

Thanks for this video, now I understand these engines a little bit better. If there were any issues I had with this video though, I think EMD's 2-stroke engines were able to run on just turbochargers with some kind of a clutch system and I really don't think oil consumption is reduced if oil gets into the combustion chamber of an engine since needless to say oil is a very dirty fuel.

[@robertschemonia5617]

They had/have a pretty unique turbo that was driven by the crankshaft at low RPMs, but when the flow of the engine was sufficient, the exhaust takes over and runs it like a normal turbo rather than a supercharger or procharger as they are known. They have what's called an overrunning clutch made into them to decouple from the crankshaft at the required RPMs and exhaust flow. Hope that helps.

[@fexploder3281]

@@robertschemonia5617 Thank you, and I already heard about that but I forgot so thanks anyway.

[@adamzahradnik8709]

If you tune camshaft on 4stroke to open intake valves and exhaust valves at same time and get compressor and turbo too, you have it much better. Without one ring and wear on rings from port lol.

[@CATASTEROID934]

Now do a video on the Napier Nomad's two models in all their wild complexity, it's a fascinating little character in a small group of turbo-compound diesel two-stroke engines that never reached maturity owing to the increasing performance of gas turbines of the day.

[@arthurgay5746]

The iconic sound of the percephone !!!

[@jacobhendrickson8935]

This is just the ultimate design. I’d so love to have a Detroit in my conversion van. Lol

[@jwills8606]

Really good. Answered all my questions.

[@WarFrog935]

Old 2 Stroke Detroits were indestructible, also all of the engines are supercharged and sometimes additionally turbocharged as well.

[@brianb-p6586]

No, they were all externally scavenged (not supercharged) with a mechanical blower, and some were also turbocharged.

[@Zeesneakyninja]

@@brianb-p6586a “mechanical blower” is a supercharger dude.

[@brianb-p6586]

@Zeesneakyninja no. A supercharger significantly increases air pressure, charging (filling) the cylinder with more air than it otherwise could... that's literally supercharging. A scavenge blower pushes air in which pushes exhaust out of an engine type (generally a 2-stroke) which can't do that itself with piston motion, leaving the cylinder at roughly atmospheric pressure... that's scavenging. The same device - such as a Roots blower - can be used with minimal pressure rise on a 2-stroke as a scavenge blower and with substantial pressure rise on a 4-stroke as a supercharger.

[@chrisbaker2903]

I wonder if you couldn't do away with the displacement blower if you used an electric motor to spin the Turbocharger up enough to start the engine? Then for more performance without the loss of efficiency of having the blower in the path, use a slightly larger turbocharger to blow into the primary turbocharger to get enough air for high RPM.

[@SycoPhan7]

At low rpm the turbo wouldn't spin fast enough to supply air to the cylinder and it would choke itself out.

[@brianb-p6586]

Yes, electrically powering a turbocharger as a blower would work, if the speed were controlled appropriately, and if you were willing and able to continue to power it until a high enough engine speed and load is reached... not just for starting.

[@davidbesant]

This is how is done in reality. The electric powered blower (or scavenge pump) operates at start-up and when manoeuvring in port to supplement the turbocharger. At full away on passage, the electric blower is stopped.

[@AAAAlberto]

Great video, thanks !

[@soumyajyotidey1565]

One thing I want to add: the locomotive you showing in the video is an ALCo WDM3D locomotive for Indian Railways, which has V16 Four stroke diesel engine, we have EMD locomotives which has V16 Two stroke diesel engine, classes are WDG4, WDG4D, WDP4, WDP4B & WDP4D...

[@zatmanh2]

Nice video. Just keep in mind that the piston’s mean speed is nearly same between a 2stroke low speed engine and 4stroke high speed engine.

[@repairman22]

True

[@partymanau]

But cushioned at the top of stroke every time.

[@zatmanh2]

@@partymanauright, it’s why I write « mean speed ».

[@CanadianOnlooker]

Now turn that injector into a gas direct injector & add a spark plug. Add variable timing on the exhaust valve. Then you have 2 stroke gas without oil mixing & big power

[@frankalbergo8120]

Flipping cool, thanks.

[@RiterraryHimmu]

Another repairman22 banger

[@LetsGoYall]

Excellent video!

[@Dave5843-d9m]

Opposed piston diesels are extremely clean. However uncontrolled injection will create black smoke. The direct injection Rotax ETECH burns gasoline but it’s more efficient and more powerful than competing four strokes.

[@chris4321das]

Great video! 🌟⭐⭐🤩

[@ChrisBro095]

I wonder if it would be possible to make a working scale detroit diesel model engine

[@justwannachillwithya]

GREAT VIDEO!😁

[@punk46664]

Sounds like a pretty good option for a slow speed, high torque rock climbing environment, maybe drifting. Otherwise, they're not car friendly. But what is your quoted 800cc engine? This would be good for a small tractor

[@blakerobinson5233]

A turbo always spins when it has exhaust blowing by it

[@billberg1264]

Have carbureted versions ever been built? You mention in the video why fuel injection is a good idea. But I'm wondering if there were designs that predate fuel injection, or if this is a relatively recent design?

[@Mike_HuntizWet]

A diesel engine wouldn’t be able to work with a carburetor

[@jeandeverchin8774]

Belle vidéo technique. Merci

[@amsterob]

Looks like a double lobe cam could be used and then it only needs to run at half crank speed.

[@amirfmaster2515]

What do you make these 3D animations with?

[@repairman22]

Solidworks

[@marinelsubu4807]

So what is next ? Do they have that 2s range extender or no ?

[@romanpetry1625]

Great video. Thx

[@jacknedry3925]

Could you do a video on the Fairbanks Model 32?

[@StopTeoriomSpiskowym]

well gasoline 2 stroke can works the same with direct injector and charger

[@tirebiter1680]

In a 2-STROKE with an angled intake port the air/fuel mixture enters at an angle and makes a loop and pushes the exhaust gasses out the exhaust port. Do we really need a valve?

[@partymanau]

Look at some of the designs used by Japanese on their big stroker bike engines before the Greenies killed em off. Angled ports, windows in piston skirts, oil recirculation. A whole bunch of tricks forgotten over the years.

[@brianb-p6586]

Need? No. Is it beneficial? Yes Port timing is the same on opening and closing, but a cam-controlled valve can have any timing desired. Uniflow scavenging is certainly better than loop scavenging.

[@spark300c]

Detroit Diesel should have made gas version of it since fuel injection has become common in 1990s. it would solve a lot emission and fuel efficiency problems of traditional gas 2 stroke engines. the blower type 2 stoke would be ideal for race cars since you want highest power to weight ratio passable. adding a turbo would increase efficiency at high rpm since the turbo act anther expansion camber. also with turbo boost the stroke does not have be as long to get a good compression ratio.

[@igvtec]

Can you do one on the brilliant Honda k series mate??

[@TheDaniel366Cobra]

I know very little about diesels but the "2 stroke" part got me wondering: is it possible to do without a blower by adding a check valve to the input? Regular gas 2-stroke engines often have a reed valve to prevent backblow of air-fuel mixture, won't having this on a 2-stroke diesel also prevent exhaust gas blowing back into the air intake?

[@Clyde-2055]

The cylinder in the 2-stroke diesel pulls almost no vacuum, so the air needs to be pumped in. On the conventional 2-stroke petrol engine, the sealed crankcase is used as the “pump” to draw the charge from the intake and then push it into the cylinder.

[@TheDaniel366Cobra]

@@Clyde-2055 I see, thank you for the explanation. The intake port is too low for effective suction to occur on the downstroke (after the piston passes by the port and uncovers it) and if the port is moved upwards any valve we could put there will be influenced by the hot gases during the power stroke. Guess there is no free lunch after all.

[@taomicioli]

With the exception of not being a unit injector that renualt engine is a direct copy of a Detroit Diesel in operation.

[@brianb-p6586]

It is the same... and Detroit Diesel was far from the only company to use that design.

[@dianstudiopro1600]

how to lubricating on two stroke detroit diesel truck

[@santaclaus0815]

good animation

[@keithyoung7]

So now I know - thanks.

[@ColCurtis]

Your opposed piston engine animation is not totally accurate. The pistons don't arrive at top dead center at the exact same time. The crankshaft with the exhaust port pistons leads the other crankshaft, so the exhaust ports open before the intake ports and the intake ports close after the exhaust ports close. This allows the cylinder air pressure to go above atmospheric pressure.

[@thedispenser8301]

Fascinating

[@vijayam1]

Brilliant..

[@eberhardtils1705]

There should somebody produce a 2-stroke double crankshaft diesel engine for a use within a amphibian airplane. Nice torque direct after start and in big heights and less consumption as well. You can find Jet A1 much easier than Avgas.

[@josipdrazin6708]

Sh.. I meant to try this on a string trimmer before I saw that I'd need a turbine. It would be one heavy trimmer.😂

[@billymanilli]

An N/A one would be a REAL powerhouse! edit: jokes aside... Does anybody know what the approximate C/R is on one of those "giant" ones, like in the cargo ships? Just curious. 2nd edit (lmao): I couldn't help it! I had to look it up... For anyone curious, they're pretty much the same as what you'd find in a smaller one... maybe a little bit higher... 15 - 20:1 seemed to be the norm, but I've seen up to 25:1 ALSO, a lot of ships are adopting more modern variable compression ratio variants.. mainly to adapt to and be able to run the wide variety of fuels out there today, from "synthetic to corn to crude"

[@blown572hemi]

Literally boat anchors nowadays in truck's. Do like hearing them rev tho, like a screaming jimmy

[@android584]

Probably need to watch this a few times to get most of the details. 2-stroke diesels are a bit hard to understand as they're an engine most people wouldn't operate or see in real life. Weird that ship engines have one piston stacked on top of another.

[@raygale4198]

Back in the 60's, 70's and 80's every second truck was running General Motors 2 stroke engines. Known as Jimmys, or bird scarers. The most efficient engine ever developed for turning diesel fuel into noise.

[@fexploder3281]

Good point, 2-stroke Diesel engines aren't very common nowadays so of course no one can entirely understand it.

[@brianb-p6586]

The lower item shown from 4:38 to 4:54 is a cross head, not a piston, and it is explained in the video narration.

[@brianb-p6586]

​@@fexploder3281they're still common... just not in trucks.

[@fexploder3281]

@@brianb-p6586True, they are still used in large ships and some locomotives today.

[@digger105337]

Problem is, the exhaust doesn't exit the cylinder completely and backs up into the air induction ring. So instead of fresh air being supplied, you get a mix of Air and burnt fuel ( lacking critical oxygen density) for the next combustion cycle. The next burn has less power than that of a true 4 cycle. And because of the second set of rings on the bottom of the two piece piston , another drag point and subsequent wear point exist. With a propensity to force exhaust particulates down into the crankcase, it increases maintenance costs by fouling the Oil more. The shorter stroke also produces less per cycle, because this arrangement of a long articulated piston. They basically gave up on this design because of the incomplete burn characteristics and Detroit went to a 4 stroke design to comply with emissions standards. Their simple and mostly mechanical, they have parts that can be used interchangeably between many different engine sizes. So they have their appeal in Military applications, were efficiency is a secondary requirement.

[@Latuya-y1n]

I know two strokes that don't have valve cams rockers rollers valve inserts or guides just spark plugss s n dome cylinder is where it breathes n digest pistons n crankshaft Yamaha banshee

[@RachidGot-md1th]

Do the the engine from the Citroen 2cv

[@repairman22]

This sunday will be uploaded.

[@alihosseiniroknabadi4828]

Perfect

[@prilep5]

Imagine somebody makes a four cylinder two stroke diesel with electric blower (super charger)

[@ronniemackenzie097]

Ferrari did a petrol fuel injection two stroke in the early 90s!

[@shanewinters3121]

Emissions have ruined the diesel engine. Now they're plagued with sensor issues.

[@mjyan3599]

High Efficiency Low Emission Hybrid ICE: By simply splitting the ring-section from its skirt - to be operated by a (valvetrain-like) piston-train to pump the gases during the intake and exhaust strokes, and combined with the skirt to complete the compression and power strokes - can achieve the hybrid. Which completes the 4 strokes, different in both displacements and periods, in every engine revolution - called D-cycle (Differential-stroke cycle) - a hybrid of the 2-/4-cycles. The D-cycle’s controllable exhaust strokes can be shortened to retain high amount of burnt gases to control the ignition initiation and combustion rates for the HCCI/LTC (homogeneously charged compression ignition with low temperature combustion). When combined with the (gasoline type) stoichiometric air/fuel ratio intake under high-compression ignition, it is the diesel-gasoline hybrid with the benefits of both - called SCCI/LTC-BGR (Burnt Gas Retention). The resultant hybrid can have Atkinson-cycle strokes, whole engine working at lower rpm, fewer cylinders with lighter engine support and vehicle styling, weight and efficiency gains, and etc. Diesel engines can avoid soot and NOx formation saving expensive after treatments with lower noises. Gasoline engines can enjoy diesel type (within structural limitations) efficiency (test shown >20%) and torque gains ( >2.5x).

[@1d305]

I got an undestanding of my qestion

[@alext8828]

7:08, "...which ends up contributing to fuel consumption." Actually, ends up reducing ...

[@edilsonmartins6653]

Motores diesel de dois tempos, são muito melhores.

[@gideondkhar993]

I couldn't understand how the lubricating system works

[@Guds777]

The longer the stroke the greater the torque...

[@kep8152]

warum wird der Beitrag deutsch beschrieben, kommt aber direkt in englisch???

[@repairman22]

Google automatic translate.

[@action4free369]

The real reasion is the oil industry. Also is it better to use a rezonance Exhaust. But they give a reason why you need a turbo 🤣🤣

[@Only_Ameen04]

Still doesn't get how blower has a limited boost despite attached to engine rpm

[@repairman22]

When the compressor spins faster, it pushes more air, but the engine also consumes more air at higher rpm.

[@partymanau]

Positive displacement pumps, not centrifugal.

[@davidbesant]

To use a positive displacement blower at full power it would need to be huge. A smaller blower is used at start-up and low RPM and a turbocharger at full power. Turbos are better for high flow rates.

[@Soupdragon1964]

Why do most 2-stroke diesels use exhaust valves rather than ports?

[@repairman22]

Timing and uniflow scavenge

[@markfairhall3671]

So they can fit in a regular truck chassis

[@partymanau]

?>@@markfairhall3671

[@fexploder3281]

@@markfairhall3671 But what does that have to do with anything in this case?

[@davidbesant]

This allows for "uniflow scavenging (which is mentioned in the video) which is more efficient that "loop scavenging".

[@Senses007-x8x]

How many kinds of diesel two strokes?????????????????????????????????????

[@the4kcar664]

cool

[@rr_plane3141]

Are you sure, that diesel had Spark plug?😂

[@brianb-p6586]

The diesel engine shown in this model has, like every other diesel, a fuel injector... not a spark plug.

[@maestrovso]

Ship engines use elevators as pistons.

[@isaacwhite7411]

I dont understand why a person couldnt use a two cylender , one as the compressor to compress the air and the other for the combuster for power that should solve the the power problem at low rpm , using diesel for a fuel should yield alot of power .

[@justwannachillwithya]

@@carstennobody7047 Yep, OLD high powered engines have INSANE maintenance schedules.

[@sockmonkey6666]

That would be the Scuderi cycle engine.

[@brianb-p6586]

Yes,@@sockmonkey6666, but there are other designs as well, using piston-controlled ports instead of vavles.

[@jason.arthur.taylor]

I drive in rush hour traffic in sport mode to keep my rpms above 5000 so that the girls cannot talk on their phones and have to look at me in anger and I know when a girl says no she really means yes. I cannot do this at 100 rpm. That's the real reason this engine cannot be used in cars.

[@unguidedone]

if a large ship is in port and is idling engines it does produce a massive amount of pollution. port towns have significantly increased cancer rates. because the energy density is so high and the fuel is so cheap i dont see any other fuel that can be used in the future besides nuclear or liquid hydrogen.

[@jamesmurney1374]

When large ships are stopped in port the big propulsion engines are off. These engines are directly coupled to the propeller so when the ship is stopped so is the engine. These ship frequently plug in for electrical power so generator emissions are greatly reduced.

[@unguidedone]

@@jamesmurney1374 they are also required to switch fuels and burn bunker fuel while out in the ocean and burn cleaner low sulfur diesel closer to shore.

[@CATASTEROID934]

A lot of ports will have steam and power provisions for vessels, it's usually preferable because sitting around in port with the engines running builds maintenance and lifetime hours on the machinery, the Russian carrier/carrier-cruiser Admiral Kuznetsov often didn't have sufficient steam or electrical umbilical provisions available to power the vessel so the engines racked up tens of thousands of hours and it shows- the powerplant and a lot of other machinery is sometimes thousands of hours beyond it's useful working lifespan and it never leaves port without a fleet of tugs in case it inevitably suffers a breakdown, and given that it is exclusively mazut/bunker oil fuelled and the poor powerplant tuning it tends to identify it's presence by belching great gouts of sooty particulates On the side, there was a paper released recently that described the effects of the disappearance of so-called ship trails, the clouds left behind vessels fuelled with high sulphur bunker oils as a result of the sulphur aerosols (in the form of sulphur dioxide and sulphuric acid produced when the former interacts with water) seeding clouds, legislation made in 2020 or 2021 changed the regulations on the limits of sulphur content in bunker oils and the net result of this was significant reductions in those trails of seeded clouds, and a proportional increase in the amount of sunlight and thus warming of the atlantic and other areas with particularly dense shipping lanes which would otherwise be scattered out into space again, as measured by arrays of satellite images and oceanographic sensor data. The concept of deliberately deploying sulphur aerosols from aircraft to produce reflective clouds or relax sulphur content limitations on commercial aviation fuels to produce thicker condensation trails has been tossed around as a method of geoengineering

[@gaorymakimoto5871]

ничем не хуже четырёхтактных двигателей

[@evansmulonda9423]

The deltic engine looks complicated

[@powerfarmer]

And there's the long-invented VALVELESS !!! "Puch double-piston engine" . . . "Puch Doppelkolben Motor" (german). . . This EXTREMELY SIMPLE (!) working principle of a gasoline two-stroke engine can also be applied to the diesel engine - and calculated accordingly!!!

[@brianb-p6586]

That's the split-single engine... a horrible and antiquated design.

[@darrellbanks4998]

Not all two-cycle diesels operate this way

[@KBoettcher13]

Your wrong about the burning oil part 100% wrong

[@repairman22]

which part?

[@KBoettcher13]

@@repairman22 two stroke diesels burn oil when new

[@CableWrestler]

Wrong - they create more emissions.

[@Latuya-y1n]

Stators

[@sourcetext]

A supercharger is on a four-stroke type engine , on a two stroke engine it's called a blower . The most important thing for a Diesel is TOUQUE not horse power ,I think that's why they just got left behind. 🤔 imo

[@Romanian_Floppa]

i still wi say after 1 or 2 weeks the blower spins the wrnong derection I AM NOT WRONG

[@repairman22]

Sure!!!! If you want to live in a lie do it. Nobody stops you.

[@ericl2969]

You ARE wrong, but I can help you. You are imagining that the air gets "grabbed between the gears" and pulled through, but that's not how it works, and in fact that wouldn't even be possible. The air-flow direction is around the outside path for each rotor, NOT through the center. Air can't go through the center between the lobes of the two rotors interlock as they pass through that area so there's virtually no space there for the air to occupy. To explain this another way, the air gets pulled along via those "wide-open pockets" between the rotor lobes as the lobes travel around the outer edges of the blower, which of course is in the opposite direction as the route for air travel that you have envisioned. Follow the paths taken by those "wide-open pockets" between rotor lobes and you will see the route that the air takes.