Why There Aren't More 2-Stroke Cars
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- Опубликовано: 27 сен 2024
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Gasoline, diesel, rotary, and even jet engines we have today evolved from designs that are over 100 years old. With the push in EV tech of late, it’s tempting to think the advancement of internal combustion has run its course. But engineers never stop inventing, and a brand new design called the entry-ignition engine could change the combustion game. And it’s a 2-stroke! But can a 2 stroke engine hold off the EV rush? Let’s find out!
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Just a minor detail... in the lower right at 7 seconds in, that's the engine I work on in my shop. The Orenda turbojet was designed and manufactured in Canada. Its American counterpart is the GE J47. Both of these engines were used in the F-86 Sabre jet.
sick
@@PorkChopForLifeMC sick as V8?
@diana p Do these actually make any money? They must trick someone because why else do they still exist.
@@slowfudgeballs9517 Zero overhead, they can fish for free
@@purwantiallan5089 sick as piss bro
Sounds like there could be a lot of parasitic power loss with this engine design. You have 4 cylinders with 4 pistons being moved by the crank shaft, yet only 1.5 of them is actually generating power.
The whole point is that instead of wasting power, the extra cylinders help recover more power. But the friction probably cuts that gain a ton.
Yep. Engine balancing and friction will make the engine lean more towards a bad idea than a good idea.
@@NickVetter That and why don't you just use a turbo to recover that power, and how is this engine not fucked already from the extra rotating and reciprocating mass. How is the engine not tripply fucked from having one piston constantly producing a ton of heat.
@@DeadpanPear Yeah, it seems like you could replace the first and last cylinder with a turbo. The only problem is the turbo probably won't work at low rpm.
@@joshmnky
This kinda sounds like turbo-compounding, in which the exhaust turbo is actually geared to the crankshaft. Or you could just make it an electric assisted turbocharger for low rpm.
I think that it was mainly emissions that killed 2 stroke cars. A buddy of mine brought his Trabant over from EG and drove it on IH-35 regularly. Many microcars also used 2 strokes and these , along with scooters, helped get Europe back on the road post WWII. Almost forgot, but SAAB used a three cylinder 2 stroke inline design for many years in their earlier models-John in Texas
That and fuel consumption. Two things which are somewhat related.
Amogus
Can I just say that it’s amazing you guys pour your hearts into making these hilarious videos EVERY SINGLE DAY? I can’t thank you enough for all the laughs and knowledge I’ve gained from this channel.
100% best educational channel on yt. So much effort put into good explanation and making it fun to learn.
They're great !
The video‘s a genius
It got more interesting when they added cutting the cheese sound effects
Cant stand Jeremiah just want to watch the video not a child
This engine even borrows from ship steam engines from the 19th century - the big final cylinder is like a triple expansion! Love it!
The triple expansion is also still seen in some modern Arctic/Antarctic ships powered by gas turbines. The turbine is essentially the first chamber, and then they have 2 more exhaust "stages" before the outlet, to extract every btu possible from the fuel.
I think it’s worth noting that some MotoGP engineers and riders have said that were the 2 stroke bikes brought back today, with the advances since they were phased out they believe that the 500cc two strokes may be able to make more power than the 1000cc four strokes. Namely things like DI fuel injection, advances in digital engine control, and the continued development of 2 strokes by some motorcycle companies are believed to be able to make a significant difference in the amount of power the engines are able to make. When the regulations first went to the 4 strokes they were much more powerful than the 2 strokes but there have always been some in the industry that attributed that to lack of development being put into the 2 strokes since they were exclusively used in motor sports and power sports. I would sure love to see what a modern day 500cc 2 stroke 4 cylinder MotoGP engine would look like when you let it off the leash.
First piston induces more air into 2nd piston, 4th piston generates a little extra power from the waste exhaust gasses, sounds like a turbo to me, replace piston 1 and 4 with a turbo, oh we made a turbo 2 stroke
Nah, it would be more accurate to compare it to a turbo-compound engine than just a turbo
I was thinking about the same thing
replace piston 2 with a supercharger.
this just sounds like another fake engine, super efficient, completely different, and it makes no sense
I wanna replace the pistons with laser beams and unicorns
@@clort123 unicorns are highly sought after on the used market
This might not make for a good automotive engine but with its efficiency it could been good as a fuel powered generator.
Maybe a series hybrid application could work? Something like the Regera or Honda’s “E-CVT”?
Well, the concept of a two stroke diesel worked pretty well- I don’t know why they couldn’t just apply the same concept to the engine just adding another fuel injection point and replacing the injectors with spark plugs
Edit: well Ferrari’s idea was pretty much that second thing I mentioned, specifically referring to the Detroit Diesel (or many larger marine diesels), which had a separate oil system and used a blower for intake pressure as well as had an overhead exhaust valve
Wait was this referring to the entry ignition or two stroke?
nah we would prefer a mustard powered engine
2 stroke more fuel effiecent? Please go back to the workshop and educate yourself.
good on a lawnmower, emissions are brutal from lawncare equipment.
12:20 Germany is absolutely dominating this video
honestly huge HUGE shoutout the the editors/animators y’all are under appreciated goats
All of that trash coming from a guy who promotes a company that uses murdered babies in their products❗️
Yeah especially with that Brayton cycle engine. That thing would've been hella more difficult to explain without a visual guide
Under rated 😂 they have 7 million subscribers
@@fishstickslyer925 the editors are underrated bozo
No like rs s/o to them very much unappreciated
This sounds incredibly unreliable. As a rotary owner, having one area of the engine that is way hotter than the rest is a recipe for disaster
theyll probably put cooling channels around the power piston or something
Does the rotary have that kind of problem also?
If they can cool the exhaust valves on a diesel they can cool the Early Injection area pretty well.
I think that valve going into the bang chamber is going to be its Achilles heel.
@@dr.science_0177 yes, even thou a wankel does 4 stroke steps, due to no having vales it is more like a 2 stroke engine in emissions too
If you find a way to spin a turbine (turbo) between the compression cylinder and the last (expansion) cylinder, it might work. You could (in theory) get this thing to make the same power as an old (medium-sized) pushrod V8. If you could maximize the torque potential, I think it would work. In that case, it could potentially work for a utility vehicle.
Being a car guy at heart,but never having had the opportunities growing up to learn about what makes a car do car things, you guys learn me something new everyday. Thanks for that. 👌🏻
Donut - “Learn yourself something new every day” 👍
If you like deep tech explanations (but easy to understand), may I suggest you two channels : _Driving 4 answers_ and _Engineering Explained_ . Trust me, those two channels are incredibly pleasant to watch 😇
“When most people think of two strokes they think of dirt bikes”
-Inserts four stroke sound
😂😂
Haha yeah I thought the same thing
Lmaooo I thought I was the only one that picked that up 😂😂
On the topic of how many cylinders it would take to make an equivalent to a regular 4 stroke, I think the most logical solution would be to use the W design like Bugatti uses, since that wouldn’t be too hard to fit in, even if you’ve got a W16 that’s equal to an inline 4, just seems like the most efficient way to fit into a car
Bro a v4 2t with only 500cc makes more than 200hp. Now imagine a modern v4 with direct injection and ~1500cc.........
2 smokes need *less* to match 4 smokes. The equivalent of a 4cyl 2l 4 stroke engine would be a 2cyl 1l 2 stroke.
once again thanks to Donut Media ive learned more than in any classroom. keep up the excellent work guys, Much love from South Africa CPT
Jhb here 🙌
Capetonian here!
Sup homies. Out in Durban. It’s poes hot.
@@DonovanBanks Same by us bru, last Saturday was 50 degrees, shits getting crazy out here
I like how they used the sound of a 4 stroke at 2:47
i dont like it at all
Same. I wish Donut would get their act together. They often prove they aren't all actually car(or motorcycle) guys, but just actors reading a script. Like when James said the Ferrari F40 had 270hp...I still like them though. Well, most of them...
That was the least annoying audible thing in the video. They seem to add 7 minutes of 7th-grade "humor" to 5 minutes of content, and that 5 minutes is 70% reliable and accurate.
If you have an audience as big as theirs you're no longer gonna want to cater to what are basically 40 year old car snobs. Id say the humor is a good thing since it well, educates and entertains the younger audience at the same time; letting Donut not do that would be gatekeeping
2:45 That's a 4 stoke motorcycle sound clip you played... 🤣
If it turns out to be efficient, it would make for a great hybrid setup. Electric car, but with dedicated onboard generator.
Agreed
The difficulty may be weight. They said on the video that the engine is pretty heavy, which is fine in a stationary setting like a power plant, but in a vehicle the engine has to move the vehicle and itself. This adds a layer of complexity, because you need a three-way balance between efficiency, power, and weight.
I wonder what the chances are of seeing propane powered EVs. Since I work from home due to the vid, my SUV spends most of the time in the garage. Half the time the wife and I take my vehicle it is just to make sure the gas in the tank doesnt go bad.
It would be nice if i could just fill the tank with propane once and not have to worry about the fuel going bad because i never drive far enough to use up the battery in my EV.
@@metalwolf112002 You can convert any gasoline car to propane it is about 110 octane but has 20% less energy per gallon than Gasoline.
It also makes it easier to use HHO in the engine
at around 3:09 you guys used a 4 stroke dirt bike sound clip lol. i bet i'm real fun at parties
You should do more Saab and Saab 2 stroke content. Some of the best sounding 4 bangers ever
ruclips.net/video/tvRRvxl0UZE/видео.html
Fax.
Sälj Aset Använd Benen = SAAB
(A Swedish car Joke)
Translation: "Sell the bastard, use your legs" not as fun, but a translation nontheless.
I'm loving the 2 stroke content 👍
Some aspects of this engine design remind me of the old triple-expansion steam engine. Three cylinders were used of different sizes to extract more of the thermal energy from the steam before exhausting to the atmosphere.
I never understood why it exhausted into the atmosphere when it should go into a condenser and go back into the storage tank
@@thecloneguyz Thermal efficiency reasons. Space constraints. Weight constraints. Usually an abundance of water to use during its operation.
The times you usually see condensers are when there are either contaminants in the water that shouldn't be released into the environment or turbine, or there's a scarcity of water. Nuclear reactors that directly boil water (in contrast to indirect cycles that send it to an isolated loop) will definitely want a closed cycle loop because that steam is now mildly radioactive. A closed cycle loop in general would mean outside contaminants are less likely to be introduced to the sensitive turbines compared to if fed from an unfiltered source like a river. Some steam trains have been fit with condensers simply because there was a scarcity of water in the area they operated.
But in general, condensers are a source of inefficiency. Heat engine efficiency is a direct relation to the temperature difference between the hot reservoir and cold reservoir of the system. Condensers introduce a restriction to the rate waste heat can be rejected from the working medium and into the surrounding air. If the working medium cannot be cooled back down to ambient temperatures, you've effectively raised the temperature of the cold reservoir and reduced efficiency.
@@BrokenLifeCycle I would add that I read samething about train condensers where used during Wars so that the trains had to stop less /stay moving or to reduce the visibility a bit even saw a picture off a steam Lokomotive with 2 condenser wagons behind the Tender
The steam is condensated into water to be boiled to steam again to repeat the cycle
Also it's about pressure not heat that's why you have a high, intermediate and low pressure cylinder in a triple expansion engine
Drachinifiel had a good video on steam engines for warships
that valve between c2 and c4 to me is probably one of the huge issue you didnt highlight, creating a valve that can open an close that quickly enough and at those temp , speeds and pressure
my favorite thing about jer-bear is he goes from dropping some serious knowledge, showing just how educated he is, to doing a weird voice and saying or doing something absurd. you are hilarious. never change
@3:20 It wasn't the Saab Sonic, it is the Sonett, that specific one is the Sonett 2. The Saab Sonett 1 was a super sport prototype that looks amazing even to this day.
🇸🇪
Well said and you spelled it correctly too.
Ohhhhhhh I thought it was the Maverick Saabre that had the 2 stroke, he’s a good bloke, smoke don’t choke engine 🤔
Went to comment this but i see i don't have to.
However i can add some more info, the name Sonett comes from the swedish phrase "så nätt" meaning to be light and/or nimble. It's kind of a hard word to translate but that is the most fitting translation i can think of.
Nerd...good info though
This idea blows my mind as much as when I learned about the rotary engine and the Atkinson cycle
Based on the fact that it's still making power even during the exhaust stroke would mean a more even power curve, so while it might not make sense for cars, it would make generators a lot better by having a more constant torque curve and smoother input to drive the electrical components, making them less prone to frequency changes and power loss under load unless I'm missing something, and anything to make a more effective generator has a market available
yes, youre missing that this system is superior when handled by a turboshaft engine, not a piston engine. The best possible engine for a car would be an opposed piston engine, which while they are extremely delicate due to implicitly requiring a Roots or screw supercharger to function properly, and theyre extremely expensive due to requiring male and female piston heads and 2 machined engineblocks, combine all the advantages of the Otto and Clerk Cycles with a minor increase in friction and weight.
3:18 Y'all really did the Saab Sonett dirty, not you Jeremiah you nailed it.
He’s much more cool calm and confident than his first videos. Props to the rest of the group for helping to build him up.
You deserve a real comment for this observation not just a bot
If they keep talking about 2 stroke engines like this, I wouldn't be surprised if they tried to do a motorcycle engine swap on a car
2 stroke in the D-list Jetta?👀
@@Benquay12 Lol it couldn't hurt it any more than it is
@diana p y'all are walking burnt toast
Brazil did that. In a Fiat Uno. HA!
@@gabrielv.4358 Seems like an appropriate car to use. Nice and small
Jeremiah is one of the best additions to the cast. It's natural to him.
Cringey guy
No he aint
@@fololoco6420 cool, your opinion and you’re welcome to it.
And Zach is also really good at this. His videos about the Miata are some of my favorite on YT =)
You should do more two strokes video’s!
There's one from a few months ago
You guys need to do a dedicated video on the two-stroke Detroit Diesels that were made from 1940 to 1995 and were put in literally anything from generators, trucks, heavy equipment, tractors, and even boats. The sound these engines make is legendary and practically helped to built America in the mid to late 1900s
Tanks and armoured vehicles aswell such as the M4A2 had twin 6-71s known as the GM 6046
A lot of (European) car manufacturers used the two-stroke, though most of them went either defunct or switched to the 4-stroke after WWII. One of them was Aero, a Czechoslovak company who had built the largest two-stroke in serial production (Type 50, 1997 cc 4-cylinder, 51 hp).
Apart from emissions, another major problem of the two-stroke is that the piston displacement can't be chosen as freely as in 4-strokes. As a general rule, the maximum displacement should not exceed 350cc per cylinder for the optimal power to weight ratio.
Two strokes do achieve a good power output by revving high, but the disadvantage is the limited torque which is only available in a narrow band. This disadvantage could be at least reduced with automatic multigeared transmissions but not completely eliminated.
Direct injection was mainly used for small engines. While the emissions from the mixture could be vastly reduced and catalytic converters were easier to adapt, these engines were far more expensive in production and had some issues with the reliability.
That comment about Blockbuster able to buy Netflix for $50million, was Savage and so very true.
But in way, glad that blockbuster didn't buy Netflix, it probably wouldn't be as good.
Loving the fact that when he shows the two stroke dirt bike it makes a four stroke sound
that killed me
"Will 2strokes engines save us from EVs?"
*John Connor tryin to escape the Terminator on his dirt bike. YES!
My Subaru converted it’s self into a two stroke
That sounds like a bug rather than a feature.
Jeremiah seems so natural in front of the camera and he makes these videos just as entertaining as James did
thats the cocaine
5:35 I'm going to have to say that looks like the Springs are on the wrong side because the spring should be pushing away from the shorter cam side
Most drivers can’t figure out how to use their indicator lights … and you expect them to do the math on 50:1 per litre or gallon
They make things that automatically add the oil. Been around a while
@@asas-mb4wj the driver would complain that the vehicle was burning to much oil..
@@ohioplayer-bl9em Mazda Rx 8 burned oil
In separateness lies the world's great misery, in compassion lies the world's true strength.
For anyone interested, the Saab mentioned at the beginning is the Sonett not the Sonic. Neat car.
I've got a 96 I'm making videos of
Yo that intro AD had me lmao at the end. “Cause not everyone lives in Southern California” I live in Vermont. The hottest and coldest place on earth
3:20 *Saab Sonett
As a swede I am greatly offended
Thanks for that.
As a Saab enthusiast I agree. Sad
Watching Jer getting hyped about engineering is a great way to wash the sour taste of Monday out of my mouth.
Keep up the amazing content!
Are you sure thats monday and not leftover from saturday?? lol sorry i had to
"when you think of a 2 stroke, you think of lawnmower, chainsaw or dirtbike baby!" *uses 4 stroke dirtbike sound*
Hey Jear Bear, could you do an episode on how the liquid piston X engine works?
Jeremiah is awesome and hes easy to listen to cus he teaches us so much he deserves to be on donut just like everyone else
@diana p quit that shit please
It’s crazy, when Jeremiah first started hosting B2B I couldn’t stand him, now he’s one of my favorites.
@@kilroywashere9678 yeah he really improved alot
"Engine goes brap brap brap"
*Trabant flashbacks*
This is probably a good idea for a generator. Set engine speed with a designed max load and increased efficiency, but otherwise most likely 🗑
Yes.
Thats what i thought, exept id ditch the precompression cylinder and add a turbo.
@@anomilumiimulimona2924 a root may work better no way to know without a couple of prototypes.
@@DawsonTyson turbos are better for gens because they're more efficient.
@@travisuysaloglu9695 yea, low parasitic loss, couple that with the constant target rpm of generators, and a proper boost map out for the turbo.
Oh... hey... “micro machine” totally reminded me of little cars I used to have as a kid
Haven’t thought about those in so long
I’m not an engineer, but I feel like this is a cool theory but I think it would be absolutely ridiculous in practice.. I really want to know what it would sound like though
"SAAB Sonic" Lol!
It's Sonnet silly boy, not Sonic. Oy!
Oh man, if you knew the dark history of Chessman Park in Denver, you would think twice about the coolness of that name.
Chessman Park was a former cemetery that was converted to a public park. There are likely thousands of bodies still under the ground in that park.
Coming from a recent mechanical engineering grad and a car enthusiast, THESE VIDEOS ARE GOLD.
These guys are clowns.
@@vorpalblades how so?
@@aaronjones9196 this video is a perfect example. 18 minutes spent on something that doesn't even have a operational prototype. Or is even feasible at this point. Engineering Explained and Driving4Answers are channels with actual engineers explaining valid concepts. These dudes spend too much time shouting stupid shit.
🤡
@@vorpalblades the title literally says “Why There Aren’t More 2-stoke Cars”. Wtf did you expect this video to be about 😂
This dude is th funniest guy on this show hands down
Day 263 of asking Donut to bring old B2B back
DONUT HEAR US
The complexity of this arrangement only makes the simplicity of electric motors that more compelling.
I have a 670ho rotax 2 stroke from skidoo in my 85 honda odyssey. Super easy swap thanks to CVT. 130HP in a little over half a liter.
The same power as the 1125cc Rotax from my Buell. Impressive
but no emissions regulations and would probably not do well at all in anything but a snow brapper
@@bentboybbz those engines do amazing in my mini buggies. Also great for airplanes (one of the most popular rotax engines the 582 is for flight) and apparently great for scat hovercraft also lol cause the guy that built cleetus McFarlands hit me up for a 670. They're great in anything you keep the rpms up. Hence 2 stroke power band
@@aaronaaronsen3360 yea its wild the hp you can get from an engine the size of a shoebox. its a fuel monster though. I have a ported high compression one that should be making at least 140. Neither has the drivability that your buell probably has lol
@@shifty1927 I should have been more specific. I meant in a road going vehicle. You are right for sure. I've seen some pretty awesome builds. I e never had the chance to really play with anything rotax. Hope you are having a Great Day sir!
I have a two-stroke dump truck from the 40s running great
This type of engine kinda sorta was already built and tested in the 60s by iirc Mercedes (c111 project) using a dual Wankel setup. One large rotor sorta served as a turbo/supercharger, providing pre compression and post expansion, the other smaller rotor behaving typically Wankel esque. The gains in efficiency was worthwhile but with twice as many apex seals to leak,they moved on to piston diesels.
Better develop it in a place with good ventilation! I'd love to see this tried even if it never leaves the prototype phase and fails...
Massively increasing the complexity of the engine doesnt seem like much of a way to compete with the incredible simplicity of EVs. The outer 2 cylinders are just doing what a turbo would do on a large 2 stroke, i cant see how it vastly increases efficiency.
Is basically a deemed down version of a jet engine with a volumetric combustion chamber
inventor claims 15% better efficiency possible, but it doesn't exist and would be heavy and complex, its a grift
I prefer that engine over electrics
The over-simplicity is a problem. For eg: if a thing has 4 parts, you can easily single out the faulty part and replace it, if a thing has only one part you replace the whole part which is often more expensive.
@@ritdhar6579 dude - thats the dumbest possible take. Its not parts being replaced with conglomerate parts - its parts that just arent there. No oiling system, no valve system, no intake timing system, no ignition timing system, no exhaust system, no pistons, no gearbox. Jus some wire wrapped round the crank. Seriously 100 times less moving parts - 100 times fewer points of failure.
Orbital did a ton of research in Australia on direct injected 2-strokes. They were eying both the marine and automotive. They eventually ran out of money as they tried to get 100,000 mile durability with low emissions.
I still think 2 strokes would've been amazing if developed as much as 4 stroke
Well, it's not for lack of trying.
The new generation of direct injection 2 strokes are amazing! But it could have come a lot sooner if developing the engine had not bankrupted Johnson / Evinrude. BRP really lucked out picking up those companies for a song.
Then Honda and Yamaha caught up quick using the blood and tears of Johnson / Evinrude engineers.
2 strokes engines are amazing, they run in the biggest container ships out there with a thermal efficency of about 50 percent, much higher than every 4 stroke will able to rech
Im a semi truck mechanic i sadly have to say that i already see a huge number of issues with that design
1. The different piston masses will absolutely murder the crankshaft
2. The temperature differences from cylinder to cylinder will put high stresses on the engine
3. The engine is very complex and will be a huge pain to maintain
Theese are just a few things that immedeatly jumped into my mind here as a mechanix
Isn’t that why two strokes have a idle screw so when you let go of the gas it’s still giving it enough to run the engine?
But in an engine braking situation the idle jet doesn't supply the engine ith enough mix to keep it lubricated at a higher rpm.
Idle screw only adjust how high or low the rpms are at idle. The low mix screw is what you are referring to in fuel.
@@chrisgauthier669 Hense the oil pumps in modern 2 cycles. Other then chainsaws weedeaters and leaf blowers.
It would be cool if you did an episode on the M4+2 Mezyk engine. It combines a two stroke piston and a four stroke piston in one cylinder :) Crazy idea and insane efficiency, much better than this engine. And there is a working prototype
What the guy needs is a bunch of engineer students with cad. A few clever machinists, some basic metal working equipment to make at least a prototype.
Rob Dyrdek & Daniel Tosh had a son and he’s in this video.
I’ll ignore the misspelled “ignition” during the cauldron scene because I love you guys. Don’t let it happen again though.
terrifying
@@huntdog8649 it was a joke big man
1776 to 1876 is exactly 110 years, see this channel does 3 things to me 1 makes me want to buy more electrical testing tools since I deal with electrical work mostly on 12v systems but also 120v systems, 2 I learn a lot about cars and 3 it makes me look stuff up to learn case in point the exact number of years between 1776 and 1876, thank you guys at dmg-donut media group for teaching me better then any teacher ever could, just saying for these type of videos you guys should make a teaching playlist since you all are teaching us viewers better then actual
Teachers!
So it's a 2 stroke, with one combustion chamber (I'm gonna guess the exhaust chamber isn't as powerful as an actuall combustion chamber because lets be honest it isnt) that takes up as much space as 4 or more combustion pistons (as the exhaust and intake compression pistons are larger). While this is great for efficiency, it does not have the main benefit of a 2 stroke, being 2 times the power pulses of a 4 stroke, as you could fit 4 4 stroke pistons in a row, and have 360 degrees of combustion instead of just the 180 this provides (assuming both theoretical engines have 180 degrees of combustion per power pulse). This is great tech, but it isnt really what I'd expect from 2 stroke innovation, actually losing its main draw for a new one.
you know, i put this vid on so i could fall asleep and then i heard "jackery"
If you think about it, the first and last cylinders do the same function of a turbocharger. It be interesting to experiment this cycle but with a turbo in exchange for those cylinders.
My thoughts would be remove cylinder 1, it just sounds like an inefficient turbo. Then solve the nightmare of balancing this engine. Even with just 3 cylinders trying to balance 3 different sizes of piston sounds almost impossible. Honestly the last piston trying to take advantage of exhaust pressure sounds cool but setting it up on a separate closed system that doesn't involve the engine itself sounds like a more practical and reliable solution.
My thoughts entirely, putting a turbo and afterburner on a really beefy two stroke would accomplish the same thing without needing to balance so much, if you ask me.
Has elements of the Double Expansion Steam engine mixed with the Turbofan. Seems cool but could replace with a shared shaft driven compressor rather than an inline piston.
Like number 3 baby woo
Prior to the development of the Series 60 engine in the 1980’s , all Detroit Diesel engines were 2 stroke. They had a lubricating system separate from the fuel system, like a 4 stroke, and even had engine retarders for downhill engine braking.
Knowledge rests not upon truth alone, but upon error also.
13:04 meant as a joke, but honestly quite shockingly accurate
I designed a 2 stroke gas engine 10 years ago. The design applied to new engines, and upgrade to existing engines. Same crank, same pistons, same cylinders, same fuel, different cam, different timing, different heads. In a 360 degree 2 stroke cycle, 2 of the 4 cycles from a 4 cycle are combined or sharing available 360 degrees. 2 power strokes = 2X more power, but there was a loss from incomplete exhaust scavenging. Engine has to run on boost all the time, just like a 2 stroke diesel ship engine. Exhaust scavenging was improved by other means. Because 4 cycles are using only 360 degrees, top RPM is limited. 6,000 RPM in 4 stroke = 12,000 RPM in 2 stroke. There were changes in the heads that allowed variable CC volume, easier than making a variable displacement engine. Engine always runs at peak efficiency; low load, high load, no load. Engine is capable of over 250 hp per liter of displacement. I have another design using opposed pistons, 2 cranks, 1 shared head. It is capable of 500 hp per liter.
5:25 just wanted to comment that while you were properly describing a centrifugal clutch, the graphic on the screen was a one-way sprag.
Otherwise this is a great video.
Much appreciate, so wow!
The at the end, "the one we all have in our kitchen" 🤣
I hate paying for RUclips to escape advertisements and the creators themselves putting advertisements in their videos. That being said. Donut is the best at making them relatively entertaining. RUclips should pay creators more so that they don't have to do that.
So question. Why not make the last cyl combustion too? Exhaust fumes usually can still be ignited too. So spark in the last cyl and it's more power and more efficiency as well as burning off more fumes.
What you want is a boost can that catches unburnt fuel and oil that comes back up the inlet but gets slowly fed back into the engine
2 stroke diesel rotary sounds like great fun
That was very good, no - really - it was very, very good. If it was a donut, it would have strawberry jam in it - oh, and sugar sprinkled on the outside... Yes, that good.
Mmm sprinkles
Homer... homer are you listening to the BMW story?
Land of choclate
THAT WAS 5 MINUTES AGO!
DOH!
Learning without reflection is a waste, reflection without learning is dangerous.
so this engine is basically a 2-stroke that has the top and bottom of the piston split into 2 separate pistons, turboed by another piston, and recycles the compression energy used by the first 2.
As an aviation mechanic, having 4 SEPERATE sizes of piston to have to figure out and replace sounds like a nightmare, imagine accidentally ordering the wrong head gasket
There is some 2 stroke wagons from when my dad was younger over here in England 2 stroke diesel
ICE aren't dead yet there is a lot still left on the bones. I will agree larger cities should reward residents who switch to EV assuming they have improved the infrastructure so it can handle the additional power demands.
I always dreamed about being stranded on a desert island until it actually happened.
2 stroke diesels have been put into production. Look at old greyhound buses or old box trucks. My bother ended up getting both a greyhound bus and a Napa box truck, both of which were supercharged 2 stroke diesels. They are called the Detroit Diesels.
"Yo, what ya got under this hood?"
"W32 CHEESY, dude! 63% efficience"
Hey guys, obligatory SAAB enthusiast here, the car you call a SAAB Sonic is actually called the Sonett. My father owns one of the later ones with the Ford Germany V4
Did Jarr Jarr just say "oil up"