The Only Video You'll Ever Need to Watch to Know how 4 Stroke and 2 Stroke Engines Work and Differ
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- Опубликовано: 30 апр 2024
- I have given it my all to try an pack as much information as humanly possible and present them in a simple, coherent and understandable manner with the goal of creating what is the only video anyone needs to watch to learn how a four stroke and a two stroke engine work. The video also covers the differences, benefits and drawbacks of 2 stroke and 4 stroke engines and also answers the question of why the four stroke ultimately prevailed over the two stroke in most applications despite being larger, heavier, more expensive and more complex.
Let's start with the four stroke. Why is it called a four stroke? It's because the four stroke engine needs four strokes to complete one combustion cycle. Every time the piston moves from top to bottom............. or vice versa............... that's one stroke. One stroke of the piston equals 180 degrees of crankshaft rotation.
Now the four strokes are: intake... compression..... combustion..... and exhaust
During the intake stroke the piston travels from top to bottom, which are also known as top dead center and bottom dead center. As the piston does this it creates an empty space or vacuum inside the cylinder. This newly created void is essentially a brief absensce of air, and because we have an abscence of air we also have an abscence of air pressure. In other words we have low air pressure inside the cylinder and atmospheric air pressure outside the cylinder. This air pressure difference cannot continue to exist and air naturally seeks to equalize pressure everywhere, and so air together with fuel from the outside rushes into the cylinder and fills it with a fresh air-fuel mixture.
Although cobmustion inside an engine is often described as a bang or explosion, that isn't what's actually happening. An explosion is detonation, which is a rapid uncontrolled process. In contrast to thist, combustion is deflagration, which is a much slower, more even and controlled process.
Combustion spreads out evently outward from the spark plug though heat transfer. The small portion of air fuel mixture initially ingited by the spark plug heats up and ignites the next layer of the air fuel mixture until all of the air fuel mixture is burned.
As the combustion flame front spreads it rapidly raises the tempreature and pressure inside the cylinder. Because the cylinder is sealed this pressure has nowhere else to go so it ends up pushing the piston down the cylinder with great strength....... This is our combustion stroke and of the four strokes this is the only one that actually generates power and it does so by converting the energy released by combustion into motion of the piston which then turns the crankshaft and ultimately the wheels.
By the time the piston reaches bottom dead center again all the air fuel mixture has been burned and we now have ehxuast gas, or the remains of combustion inside the cylinder.
Now in the case of the two stroke we have a cylinder head together with the valve cover whereas in the four stroke we really have just a cylinder cover or cap. There are zero moving parts in the 2 stroke head. No valves, no chains, no cams, no springs and therefore less weight, less complexity, less cost and less potential for failure.
Each time the 2 stroke piston is at top dead center a combustion event occurs. This also explains the name „two stroke“. The engine only needs two piston strokes to complete its combustion cycle. In other words each 360 degrees or one full engine revolution results in a combustion event. Whereas in a four stroke combustion occurs only every other time the piston reaches top dead center, combustion occurs only every 720 degrees of engine rotation. This means that the two stroke produces twice as many combustion events or power pulses for the same rpm, which means that, at least in theory, the two stroke engine can make twice as much power from the same displacement compared to a four stroke.
The other important thing we can note is that the strokes are very clearly defined and separated in a four stroke. Each completed stroke of the piston marks the beggining of one and the end of another stroke of the combustion cycle. But the two stroke sort of lumps the strokes together, they overlap and occur simultanously. The two stroke is actually multi-tasking which enables it to squeeze more action into the same time-frame. But as with everything, there is a price to be paid.
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#d4a #2stroke #4stroke
00:00 4 stroke combustion cycle
08:02 2 stroke combustion cycle
13:24 Reed valve
15:02 Lubrication
21:12 Compression ratio
23:41 VVT & Power valves
27:18 Direct Injection 
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Direct injection two-stroke has already been solved by the Rotax 850 E tec
Engine.
Here is another way the 2-stroke and 4-stroke differ, at least with Motocross bikes: When people with some free enterprise in their hands created the 2-stroke engine for Motocross bikes, say starting in the early 60's I believe, the cost of a dirt bike went down, (and I bought 3 of them as a kid making $1.00/hr at my Dad's store at the age of 10-16, in 1974-1980). But when a dictatorship like the EPA forces the 4-stroke engine on the MX industry, the price almost triples again, (the first time is a similar story of intervention of free enterprise.), and not many people are affording them anymore. The bike I bought for $800.00 as a kid, can not be afforded as a kid today at 10 grand.
There is another difference between the 4-stroke and the 2-stroke for MX, and it is the same difference between communism and liberty.
I wanna say the guy sounds sounds a irritated
1¹1
Hey why not add intake and exhaust valves to the 2 stroke engine won't it solve these problems
i am a university professor in mechanical engineering and I have never seen a more practical way of explaining the difference between 4 stroke and 2 stroke than this video without sacrificing the crucial details. Many thanks! I will also share that with my students.
I'll appreciate you for being active on my channel 🔝🔝🔝DM ME ON TELEGRAM with the above username, I have something for you.
Most professors are about as bright as a shot light. Sense of humor like a dead dog!
Yess sir!!
Yessir..their length of the power strokes ..explained well the differences..very clear.
Found you here sir lol..
The 4 stroke always made more sense to me… the 2 stroke has always been more a mystery. I’ve done some rebuilding and porting on 2s, but damn whoever came up with that idea is pretty clever imo. The 4 stroke is very straightforward technical engineering and the 2 is extremely clever outside the box engineering.
for real, 2 stroke on paper also shows better efficiency, but theory only takes us so far huh
@@mrnobody1546modern 2 strokers are more efficent
My 2 stroke yamaha never failed to amaze me, i was thinking i was changing engine oil but later i found that was gearbox and wet clutch. Lol
To see the correct level of this oil, you need to start the engine 10 or 15 sec. Whaaat?!
Indeed, i dont know if two 2T engines are simple or complex but they are genius.
I mean simpler cause less parts, but complex how the way they work.
No 4 stroke will ever run like the 250 Quad Racers or the 500 Quadzillias of the late 80s and Early 90s And the KX and YZ 125 and 250 dirt bikes
They were built to hammer down and grip and rip hill climbs and blast down railroad tracks like bullets!
Now get one lowered and extend the axles and you got a flying flat tracker that you better hang on to cause it's riding a rocket on wheels on a circle dirt track.
Some of the most fun and greatest times I've ever had in life.
Never has there been a 4 stroke that can compete with a 2 stroke unless the 2 stroke rider is scared to twist that throttle and fouls the plug!
Theory may seem to favor the 4 stroke but reality on the track is proof the 2 stroke will bust that ass!
ALL DAY AND ALL NIGHT! .FACTS!
@@TRAXRIPPERtruth
As a retired engineer /professor; I can surely say that this gentleman gives beautiful explanations of rather complex issues. Well done!
Absolutely. Great comment.
He knows what he does
Nothing on RUclips comes close to this video it's amazing
I don't know what motivates you to make these videos, but I hope you never lose it. As a fellow gearhead, it's sometimes challenging to explain to a non-gearhead why things are designed the way they are, but you do it so simply and eloquent, I've often referred others to your videos instead of trying to explain it myself. In fact, I watch your videos with my 8 and 9 year old son's all the time so they understand better how things are built. Your videos are invaluable and I sincerely appreciate your effort
As a father of two sons myself I'm incredibly happy to hear the content is enjoyed by the next generation too. Thank you
🙌🙌
😊😅.
😅❤😅😅
i also sincerely appreciate his effort.
I can’t even quantify how much I’ve learned from you over the last few years 🤯
Same
Same!
Same!
omg, that's right! Same!
Yep! Same!👌👍
The best 2 stroke video I've ever seen. I was a powersports dealer selling & working on 2 stroke snowmobiles for a decade and I learned more in the last 10 minutes than I did in 10 years working on them. Thank you!
😂😂
As a professional stay at home astronaut, huge props for communicating such complex topics with such amazing clarity
As a professional stay at home kosmonaut, I couldn't agree with you more. Since education rarely, or never, includes examples or demonstrations of basic mechanics for astronauts I'm very glad you found this video.
Lol. I know theses comments are killing Me 😂
I'm a retired auto mechanic, and I've never completely understood how a two-stroke works. Your presentation was, quite simply, amazing! Thank you!
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Same here.. but without the retirement.😉jealous much
Now check into how a Detroit Diesel 2 stroke works, unlike these 2 strokes that work on the principle he explains here that's how common dirt bike, chainsaw and weed wacker engine's operate the crankcase of a 2 stroke Detroit Diesel engine is the same as a 4 stroke engine wherein it has a normal bottom end that has the engine's oil supply in it like a car engine, complete with a dipstick, instead of having the air/fuel mixture passing through it with the downward motion of the piston pressurizing the crankcase to force that air/fuel mixture into the cylinder and the upwards motion of the piston creating vacuum that draws the air/fuel mixture into the crankcase, and it's why they MUST have a blower on them (notice I didn't say supercharger, I'll get to that in a moment).
The way they work is when the piston is near the bottom of it's power stroke from the combustion process the cylinders exhaust valve's open letting all the pressurized exhaust gases blow out, then at the very bottom of the stroke the piston uncovers an intake window on each side of the cylinder, that parts the same as the 2 stroke engine's he shows here, they have those intake windows instead of intake valve's, the windows are the end of the intake tract that begins at the blower, with those windows and the exhaust valve's both being open that allows the pressurized intake charge to push the residual exhaust gases in the cylinder out past the exhaust valve's, that's how the cylinder gets scavenged and the intake charge is introduced into the cylinder, then just as the piston moves up and covers those windows the exhaust valve's close at the same time (approximately) resulting in a fresh intake charge in the cylinder that's then compressed during the compression stroke.
This is why the engine isn't actually supercharged despite people mistakingley believing they are because it has a blower on it, without an exhaust valve that's closed and an intake valve that's open with the blower pumping a compressed charge into it until an intake valve closes it's not truly supercharged, it all works out as though a normally aspirated engine would.
They might have a moment where the exhaust valve's are closed and the intake windows in the bottom of the cylinder are still exposed that leads to maybe a pound or two of charge being trapped inside the cylinder at the right RPM's but I'm not sure on that one, I do however know that they really aren't considered to be supercharged engine's because of their operating principle.
Long before I learned how they worked I spent literally thousands of hours operating one in the Army as the driver of a weapons system that was built on an M113 armored chassis, they're powered by a V6 Detroit Diesel 2 stroke, I always used to joke around and say that they didn't really need a throttle pedal but instead could have just had a toggle switch that had "idle" and "run" positions because you either had one idling or the pedal stomped all the way to the floor in order to get one to do anything, not long after I got out of the Army I was talking to an old timer truck driver that drove back in the day when some trucks used those engine's, he said the joke back then was if you were going to drive a truck powered by a 2 stroke Detroit Diesel the way to get one to really run was to slam the door on your hand when you were getting in the truck.
They didn't produce nearly as much power per cubic inch as a modern 4 stroke supercharged/turbocharged diesel engine does but they'd last a long time in between rebuilds which is why trucking companies liked them, they were also common for energy sources in places like steel mills since they'd last so long, places like that actually had them set up in ways where through turning a set of valve's to route the oil through a different set of filters they could have an oil and filter change performed on them without them being shut down, they're also made in both left and right hand rotation with the fronts and backs of the blocks being made in such a way that they could be bolted together, two V6's could be bolted together to make a V12, they didn't make the best truck engine's but where they really shined was their industrial applications like in a steel mill where they had to reliably run 365 days a year 24/7.
You are not a good mechanix
My understanding of 2-stroke: 20,000 rpm squeezed into 10,000 rpm
50 years a mechanic, but thoroughly enjoyed this. Beautifully done.
Just shared it with my son who is an apprentice mechanic.
Absolutely marvellous.
🙌🙌
Guys, Here is our True Savior
YaH The Heavenly FATHER HIMSELF was Who they Crucified/Pierced for our sins and “HERE IS THE PROOF”
From the Ancient Egyptian Semitic:
"Yad He Vav He" is what Moshe (Moses) wrote, when Moses asked YaH His Name (Exodus 3)
Ancient Egyptian Semitic Direct Translation
Yad - "Behold The Hand"
He - "Behold the Breath"
Vav - "Behold The NAIL"
@@Praise___YaH TL;DR
@@Praise___YaH you are on the wrong channel, nutball. What are you doing here?
@@Praise___YaH Yah Yah yah yah...whatever, mate...
I am not a professor, but a usual housewife with no knowledge of mechanics.
But I must say, I understood this stuff quite easy thanks to great pictures, models and that magnificent voice!
Lol
Respect for this guy. His explanations about mechanics are always precise, entertaining and easy to understand. Best YT in its class.
That was incredible! As an experienced Mechanical Engineer, I know these 2 systems pretty well and understand them, but you re probably the only guy who can explain it so so well so easily to EVERYone. Awesome job!
Listen man i'm RUSSIAN, I can hardly understand most of the english language videos. EVEN I love to watch this guy because I UNDERSTAND.
Youre an 'experienced mechanical engineer'?
Yes of course you are dear.
@@SilverJohnes By the way, English in these videos is quite clean and clear. Very nice explanations and very good pedagogical capabilities of the author (I wish I could name him).
I remember once when at a girlfriend's house I ended up watching sesame street, to entertain her child. Well, I was a college graduate with a math degree and when done watching that shoe I had the weirdest feeling that I really understood the number 8 and the letter M. This guy does the same sort of thing, even though I have long built both 2 and 4 stroke engines I feel that I now understand them better!
@@aldenconsolver3428 did you really FEEL that connection to big bird?
I have been a motorcyclist for 53yrs. Built tons of bike, both 4T and 2T (the latter my favorite). I appreciate BOTH segments, and have owned multiple (30+bikes). This was THE best video that I have ever seen to help me explain to others the differences between the engine designs (and honestly helped me) ! Wonderful video, you did a great job. Your filming, production, explanation where all world class.
Holy crap.....agreed....old head shade tree mechanic here
What is the T reference? Throw? Why not S for stroke.
Wear is your grammar? has it begun to where out? All jokes aside, I found this to be a fantastic video. It really covered virtually all one needs to know regarding the difference between 2 & 4 stroke engines. The explanations aided be the added graphics were fantastic!!
@@saraheart8527 Wear is your Gramma¿¿
@@rileydj8764 probably Time or Timing. In Brazil we say 2 Tempos or 4 Tempos, Tempo meaning Time obviously, so 2T and 4T
i barely know anything about engines but i literally understand everything now cus of this vid wtf
I am also a Professor like some of your other commentators (medical, not mechanical engineering), and I too want to compliment you for what is easily the BEST explanation of a 4 stroke vs. 2 stroke engine! You have a true gift for breaking down complex concepts! Thank you!
Cannot believe that this is free content. This is probably the best comparison of four stroke to two stroke engine ever made
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I've been teaching my son since he could walk about cars, motorcycles and all things mechanical. He's 24 now. He has commented back that your videos have opened the door into this world. Like me, he's a visual learner. I can learn more from a 20 min video that a 3 hr lecture.
Your illustrations and visual aids at this point are one of the best that I have come across on YT. Great vid. Keep it up!
ruclips.net/video/rhgwIhB58PA/видео.html&ab_channel=Veritasium
I accidentally read the teaching as touching and was confused af, had to reread it! 😂
Guys, Here is our True Savior
YaH The Heavenly FATHER HIMSELF was Who they Crucified/Pierced for our sins and “HERE IS THE PROOF”
From the Ancient Egyptian Semitic:
"Yad He Vav He" is what Moshe (Moses) wrote, when Moses asked YaH His Name (Exodus 3)
Ancient Egyptian Semitic Direct Translation
Yad - "Behold The Hand"
He - "Behold the Breath"
Vav - "Behold The NAIL"
It's ironic that I love seeing/listening(to) these tutorials over and over when, having known these principles of each engine for many decades.
As well as having worked on both 2 and 4 strokes for most of my life. These illustrations are just perfect in explaining to others who are ignorant on basic engine operation. Thank you.👍🏼
One of the best and easiest videos to learn from. The guy who made this video did an amazing job
I remember 40 years ago my grandfather explaining to me the difference between 2 stroke and 4 stroke engines. From his explanation I had a rudimentary understanding of 2 stroke engines. Your video greatly deepened my understanding of 2 strokes on top of the knowledge he gave me. Thank you!
It's definitely a concept that takes a bit more info to fully grasp. Awesome vid
Thanks for ICE working concept clearance. I wish adding some more featured clips from your side.😊
most underrated RUclipsr and better than most college teachers
U only underrate him
Most college professors aren't spending 30 minutes and hundreds of dollars on an intro demo. Resources are spent on the hard stuff to explain, like the math, mechanical dynamics, thermodynamics, compressible flow, heat transfer, and vibrations.
If you aren’t a teacher, you definitely should be. I have watched quite a few of your videos and the way you explain everything in detail the way you do is amazing. Keep up the good work my friend. Thank you for the knowledge 🙏
I feel like this channel will be a god send when I go to college for mechanical engineering
Wow! I'm 51 and thought I understood 2 strokes. This video really cleared a lot of my misconceptions and replaced my ignorance with actual knowledge! Thank you!!!
Yeah except this is only one type of two stroke engine... and one type of 4 stroke, and it is presented as if where a be all and end all demostration when in fact it is just a tiny slice of the possibilites and what exists. 2 stroke marine engines and 2 stroke diesels are BOTH different from what is presented here and even among the diesels there are different types.
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It is so easy to take for granted the amount of engineering that has gone into so many things in our lives.
Thats why they charged bug bucks
Combustion oil runs in my blood since I got my first ride (Yamaha RX-K). May the 2-stroke engine's era revives in the near future, amen.
As someone who just likes to work on his own motorcycle for fun and has interest in the mechanics of different engine designs I think this video is brilliant. You presentation style, explanation and animations are really engaging, informative and helpful. Thank you for taking the time to make this.
As a girl who rides dirt bikes who would always annoy my dad and brother with questions for just wanting to understand her dirt bikes, thank you for the great explanation. I always felt so stupid asking and they would clearly get mad because they think I’m too dumb to understand or just don’t want to explain it. This really helped me understand the differences between my four stroke and two stroke dirt bike. Thank you!!
@@djpearson5722 I don’t think it was that, my dad was a mechanic and my brother has rebuilt my kx 85 before and they both work on their own things. I think my dad has that old school mentality that girls shouldn’t know these things or whatever. I think they truly think I’m just too dumb to understand lmao
What a wonderful and in-depth explanation. No fluff, no gimmicks, just straight forward educational information in an easy to digest format. Thank you!
How eloquently spoken. I have a significant understanding of mechanics and my father was a diesel mechanic for 45 years and I am so happy I finally have gotten to see the internals. You've put an ear to ear grin on my face, both emotionally and physically. Thank you, from the bottom of heart.
I have struggled explaining 2 stroke and 4 stroke operation to my grandson. Fair enough, he is only 9 and seeing this complete video it was a delight to see his mouth open as he now understood it. Is he a bit young to expose him to this I don't think so, as a farmers son I was surrounded by engines in different states of repair. Thank you very much.
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He is definitely not too young. My son is 6 and is starting to understand! He's constantly there while I'm working on my truck! They are never too young!
This was the perfect format for myself! If I see a process visually, I am extremely unlikely to forget it - vs if I reading about it! I cannot thank you enough for this exceptional explanation & demonstration. You are truly an amazing teacher 🙏 keep up the great work, I love your videos 🔥
I'm the exact same way, I can't wait to watch the rest of the videos!!
I'm an engineering physics graduate, but from 25 years ago. You have explained so many previously mysterious things in such beautifully concise and wonderfully interesting and entertaining ways. I don't know where or how to thank you enough, so I guess I'll leave a comment as well as a like this time.
It's the depth of knowledge you have that sings through everything you make. From explaining and correcting the misconceptions about commonly misunderstood engineering concepts in a positive and unerstandable way, to never tiring (well, almost never) of reiterating core concepts like the best of science teachers, it's the iceberg knowledge factor that keeps me coming back. It's like watching video of a jazz virtuoso play the best version of your favourite song,.
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This is an absolutely fabulous explanation of the two different engine models. I’ve seen great animated screen graphics before but this actual engine cut in half leaves nothing to the imagination and is the best presentation I have seen on the topic. You’ve put into one video what I have been trying to explain to my sons for, well, years! Thank you!!!
Most underrated channel on RUclips. This belongs on television and in university
I have never seen a better video on YT. Thank tou for that complex explanation.
I've disassembled 2-stroke engines as a teen in the 80s and later owned an RD 350 with YPVS, so I have a bit of amateur experience.
This is by far not only the best comparison video between 2 and 4-stroke engines, it is the best YVPS explanation! I learned something about the exhaust "resonance". Great work on the video and fantastic results. Thanks!
Absolutely 💯 - Ohio
Had a DT 125 with YPVS back in 90's. Some of my friends had the YPVS locked in place.
It felt like they had half the acceleration of a YPVS . Pretty amazing what difference it made. Never really knew how it worked, just assumed it created more pressure somehow. Wasn't that far off.
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Now go check out how a 2 stroke Detroit Diesel engine works, their crank cases are like a 4 strokes wherein they house the engine's oil supply like a 4 stroke and have nothing to do with passing the air fuel mixture into the cylinder.
Prepare to have mind blown.
Wow! I am highly impressed with this video. I'm a former ase certified mechanic with an auto technician degree, so I'm very familiar with a four stroke engine. After watching this video, I now understand a two stroke engine so much better than I ever did before. This would be a great video for an auto technician instructor to show his students on the first day of engines class. I think it would jump start their understanding of how an engine works.
I'll appreciate you for being active on my channel 🔝🔝🔝DM ME ON TELEGRAM with the above username, I have something for you....
Just amazing. The most informative video on engines have ever watched. Impressive.
One of the things I have difficult time is putting manuals into pictures and this video is very good at bringing the concepts together. I am restoring a WWII jeep and most forums I have found don't explain the concepts of how the L134 motor actually works. In this video you show the details exactly how I needed to see them. Thanks a million for taking time to do this video.
By far the clearest explanation I’ve seen on the difference between two-stroke and four-stroke engines! If you do plan to make more future videos on two-stroke I’d also love to see obscure two-stroke designs such as diesel and marine applications, forced induction, and the inclusion of sleeve and rotary valves instead of reed valves like in Rolls-Royce Crecy and an experimental Ferrari F1 engine from the 90’s. VisioRacer did a great job introducing me to this, and I want to learn more.
I definitely second this
Except the title is completely misleading... as there are two stroke gasoline and two stroke diesels are that mechanically significantly different than what is presented here.
At the end of the day they use the same principle. SUCK, SQUEEZE BANG, BLOW.
@@Wingnut353 I understand your point, but I suppose he was referring to the everyday examples people are aware of.
As a loving Trabant 601 owner, this is one of my favorite videos you've made! It's also fascinating to see how it's engine compares! It uses rotary valves instead of reed valves, three piston rings instead of two, and produces more torque than horsepower. Also due to the rotary valves, rebuilds are not cheaper than a 4-stroke per se, because the valves slide directly on the aluminum crankcase there's pretty much nothing to reuse, you rebuild it by replacing the entire engine minus the engine accessories which are fully serviceable. In case anyone's curious how long a 2-stroke car engine lasts, it's best measured in decades, not distance :)
So ein Trabbi ist schon toll.
crankshaft regeneration being the biggest cost
It is also worth nothing that is a single type of 2 stroke... the gasoline two stroke and it is possible to build very different types of engiens with a 2 stroke cycle. The 2 stroke diesel for instance..... one of the most important engines of the last century.
@@Wingnut353 Indeed, the diesel 2-stroke has been used in many vehicles ranging from trucks to container ships, their importance cannot be understated.
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This is by far, the most clear and comprehensive explanation on engines. Thank you!
You are not only knowledgeable, you are also a very good teacher!
This is what I learned as a kid when my dad bought me 2 see through engine model kits. One was a Chevy small block the other was a Yamaha 2 stroke and see by learning and building was amazing. Both models had all the moving parts making it easy to understand quickly.
Convert the Chevy into a 2 stroke
@Bruce Miller how would you do that?
@@LifenSantaBarbara You can poopet valve loop scavengind or cut ports in the block.
Poppet valve loop scavenging.
Oh, yeah. "The Visible V-8". Mine was functional on gnarly 9 volt horsepower, with tiny red lights for plugs that lit in the actual firing order...real bitch getting it to run right, and be careful with that glue, folks!
This has to be the best video about 2stroke vs 4stroke on RUclips
I am a small engine mechanic who deals with both 4-stroke and 2-stroke engines every single day. I'd be lying if I said I didn't learn anything from this video. It's so interesting to see these engines from the viewpoint of "how are these engines different?", instead of my usual "what the hell is wrong with this thing?" viewpoint. Thank you so much for making these videos!
I'm a BEV owner, but I rode and drove ICE 2 and 4 wheeled vehicles for over 40 years, educating myself over the years in engines. So I can say with a measure of validity that your explanation of the 2 and 4 stroke engine cycles is excellent. It's certainly the most comprehensive short video to cover these engine types in their similarities and differences that I have ever come across. Anyone who was confused before watching this video would not be afterwards. 👍
🤣You started off with a Mohamedan/Islamic curse that has no wings or cylinder to take off or land safely. The Mohamedans are so much afraid of the exposures of their said 'Prophet'...they decry very much the marrying of a 6yr old Aisha and Consumating it 3yrs later when she was 9yrs old. In the meantime he did other sexual acts to her...disgusting. ..hey ho...just wanted to point on to that reality...that this guy mohammed was no prophet but a cult leader...cult leaders adore sex! don't they, they all do...multiple women will be found in their list of expandables....
I studied all of this as a motorcycle mechanic but could never explain it as perfectly as you did. Great video my friend. I want to explore more of your videos.
Lived for 40 years and this is the best 2 and 4 stroke difference video I saw
One of the best videos I have watched on the operations of two stroke and four stroke engines.
This is the only guy I can listen to that talks this much that I can keep listening to, what a gem.
I wish this videos would have existed 20 years ago when I was still tuning my 2T engines. Nevertheless I apparently knew 90% of its functionality and was able to tune my engines properly, but still.. this would have made it far easier. Great job! Undoubtedly the BEST video explaining these two engines.
If you wanna go on a deep dive into the abyss of 2-stroking hit '2 STROKE STUFFING' here on youtube ... i build some really high power (in my mind at least lol) small displacement engines (50 to 74ccm with ~10 to 21HP) back in the day but that guy ? completely mental!
@@sicstar please tell me more about this topic
Thank you for your videos. They bring us so much knowledge and fun. I wish I could contribute to this more than that amount but I’m merely a student with a side job. Nonetheless I hope this still helps you in the great scheme of things. Thank you for your efforts :)
Greetings from Germany
Thank you so much. The amount doesn't matter. Any amount is a big motivation as it shows that the content matters to people. Thank you again and best of luck Oni san
I am in my final year of mechanical engineering, and engines just fascinate me...This video almost made me cryy...This is soo beautiful....The humanity must realise how revolutionary invention an engine was...Thank You for such a beautiful video..
By far the easiest visual and in depth explanation on how the 4 stroke and 2 stroke operate and how they differ that I have come across. Fantastic job! Thank you!
This guy really knows how to explain stuff, am currently in mechanical engineering and even tho I know most of 4s and 2s engines i re-watch this video because it just puts a smile on my face. His explanation is out of this world and the 2s era was surreal. Keep it up🔥🔥
The best explanation I've ever came across of the two engines
Wow! Wonderful work....at 73 years, I now have a good grasp of the engine concepts. Thanks.
Wonderful quality content. 2 strokes have a special place in my heart even with their inherit quirks and inefficiencies.
Definitely the best explanation of how a combustion engine works in addition to explaining the difference between a four stroke and a two stroke engine. Thanks so much.
The first half of the battle for knowledge is knowing what you're talking about. The second is having the ability to convey that knowledge. To you sir, I say Bravo!!
I am an automotive technician for the past 24 years and the way you've explained this is so practical and simplified!! Great job
4 years of Mechanical Engineering and this 28 min video teaches better than what books or professor could during "IC Engine" lecture
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This was clearer and better than a whole two years of mecatronical superior technician studies in my institute. Thank you!
Brilliant! What an excellent description and demonstration. You have a real gift for making things easy to understand while staying true and accurate to the details and complexity. Much respect to you!
While in the 9th grade high school auto shop in 1971, I was having a tough time trying to understand how an automobile differential worked. Our instructor brought out a small model cutaway of one that he past around to us students. It was instant understanding like your engine models! Better than any book.
Amazing explanation!! Haven't seen a clearer and detailed explanation of how these two types of combustion cycles work!! The value you put out is priceless, my friend!
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Best description of the difference in engine types (4S & 2S) I've ever seen!
Well done!
And, thank you.
This is truly an impressive video. The clarity that came with the explanation was exactly what you hope to get out of an educational informative video.
I've ridden and rebuilt 2 stroke dirt bikes for over a decade, seeing this video has made SOO many things make more sense. Crazy how you are able to do the very basic things without knowing much about a system.
Video was extremely helpful while staying on point and not dragging anything out.
this is so great for my theory, i'm always bored of college, imo they are teaching me way too much UNimportant stuffs along with it, and the fact we still need to learn and exam those as well, it's time and energy wasting for me.
I always thought i can learn something without knowing the theory, thus drop out. I'm glad to know people like you.
P.s not hating on education but it's just not for me.
edit: also i love theory too, exactly why i'm watching this video in the first place, but in schools we learn way too much uninteresting (for me) and unimportant topic along with some interesting ones.
The best video on youtube explaining not only the difference between 4 stroke and 2 stroke but also how an engine works. I have a harley davidson and I always wanted to understand how the engine works, but I couldn't find anything until this video🙏 Thank you
This man literally makes the most comprehensive explanations
WOW, I’m impressed. I got through many years performing much of my own maintenance on my cars, trucks, bikes, lawnmowers and more. How I managed to get this far in life without the understanding that you have made possible is shocking. Thank you for your skills and desire to share your knowledge.
I’m very grateful.
It just means you have a natural talent for it!
Add an exhaust trapping valve and DFI or opposed piston and 2 stroke turns totally superior. 4 joke stroke is over rated junk and I hate them in cars/trucks also, Remember lightning bolts and the sun are 2 stroke plasma entities! Nature abdores the 2 stroke cycle!
My dude, your channel is an absolute gem and you always produce some of the best videos out there among engine design.
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The best video on the internet ... well done sir
this is one of those instant subscription type of videos. fantastic explanation!
I felt like I deserved a mechanical engineering degree after watching your video 😁. The explanation is so thorough and easy to understand for a non gearhead like me.
Awesome, totally awesome video.
Not an engineer or mechanic. This video is phenomenal. I have a general and basic understanding of how engines work but this video was so well done. Informative and well explained. Makes a complex mechanical procedure easy to understand for a layperson. Kudos to the content creator!
I’ve been around two and four stroke motorcycles for decades and I have never seen a better and more easily understandable explanation of the how each configuration works with a clear articulation of the pluses and minuses of each design. Simply brilliant!! 👏🏼👏🏼❤️
This video has answered so many questions I have had. For a novice to engines, this is the best explanation video on this process that I have ever seen! Well done!
Nice to see you touched on the Direct Injection. OMC brought that out in 1997 on some of their Outboards, and because of how it affected the Combustion Process resulted in many Engine Failures due to Carbon Buildup behind the Rings. DI has also created many problems for 4 Stroke engines too
Mercury Marine also had a line of DFI engines around the same time (I was a Merc dealer at the time). All of those DFI engine injectors were based on a 'new' engine developed by one Ralph Sarich. Mercury bought the rights to the entire engine system just to get the injector system in the 'Optimax' engines.
If I remember correctly Aprilia offered direct injection on two stroke scooters in 1999.
@@jsfrederiks Honda tried it on their V4 2T grand prix engines but ultimately stuck with carbs.
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Great video explaining what I thought I knew, but didn't completely know. You are an asset to the craft.
57 year old motorcyclist and now I finally understand the difference between 2 and 4 strokes. Great explanation. Thank you
Hands down, the best video about engine internals.
I can't describe how utterly perfect this video is
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I feel like an engine builder after watching this video! 😂 Have always wondered the mechanical differences between these two. Thanks so much for the amazing explanation.
This was absolutely brilliant. I have been struggling to understand a few things about the difference between two and four stroke engines, but this makes everything clear. Well done on this.
Writing from Nigeria men I have never seen a practical way of explaining a combustion engine.
I really appreciate ur effort, even the audio of this video. Thanks so much
Great explanation of a two stroke engine. I never knew what the expansion chamber was used for until now! Also, it will be interesting to see how a direct injection two stroke will evolve.
You Sir are not only awesome when it comes to explaning stuff, but also entertaining in a very subtle way, which I might like even more. Huge respect coming your way.
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Outstanding illustration for curious minds of all levels and experience. VERY well done.
One of the best 4T and 2T explanations with all the detailed pros and cons I've seen
While I understand the concept of 2 and 4 strokes, this was one of the best videos about this topic. No 3D schematics, just showing the things in real life. Great job! And nice Yamaha TZR. I am glad that I was still able to ride a proper 2 stroke race bike: Aprilia RS 125 with incredible 34hp!
I had got the aprilia rs with 34hp too with the rave valve. What a bike, i miss her a lot. It was almost 1 time a year at the mechanic but when it wasn't broken was so funny to drive. 😍
@@carlo582 I had also the chance to ride the RS250. That was a real beast!
I'm envying you a lot right now! 🤣🤣
I am a newbie to motorcycle mechanics, and I have to say, this is the best video I’ve ever seen to explain the difference between these two engines, and it really gave me a great understanding of how Mike works. Bravo! Great job and please keep the videos coming
EXCELLENT video! Thanks for the great information!
Superb! Clear and at a speed to have the time to ingest. The best so far! THANK YOU!
Your videos, animations, models, examples, and verbal descriptions are always absolutely incredible, and this is one of the best! I've been an engine nerd for decades, and still learn something from everyone of your videos. Hats off to you man!
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This was excellent, I keep coming back to 2stroke vs 4stroke to remind me of the differences. This video will probably stick with me longer than others!