2 Stroke V 4 Stroke - All the Info You Will Need!
HTML-код
- Опубликовано: 21 сен 2024
- How 2-Stroke vs 4-Stroke Engines Work and Differ - 'Side by Side COMPARISON'
Two-stroke and four-stroke engines are two common types of internal combustion engines with distinct operating principles. Here's how they work and the key differences between them:
Two-Stroke Engine:
Suction and Compression: Unlike the four-stroke engine, the two-stroke engine combines the intake and compression strokes into one. As the piston moves upward, it simultaneously compresses the air-fuel mixture in the crankcase below it.
Ignition and Power: When the piston reaches the top of its stroke, the spark plug ignites the compressed air-fuel mixture. This creates a power stroke that forces the piston downward.
Exhaust and Scavenging: As the piston moves downward, it uncovers ports in the cylinder wall. These ports allow fresh air-fuel mixture to be drawn into the cylinder while simultaneously pushing the burnt exhaust gases out through another set of ports. This process is called scavenging and is one of the defining features of two-stroke engines.
Repetition: The cycle repeats with each stroke of the piston, and the engine does not have separate intake or exhaust valves. This results in a power stroke every revolution of the crankshaft.
Key characteristics of two-stroke engines:
Simplicity and fewer moving parts.
High power-to-weight ratio.
More polluting due to unburned fuel escaping with the exhaust gases.
Typically no separate oil lubrication system; oil is often mixed with the fuel.
Commonly used in smaller, lightweight applications like chainsaws, outboard boat motors, and some motorcycles.
Four-Stroke Engine:
Intake: The first stroke, called the intake stroke, involves the piston moving down the cylinder. The intake valve opens, allowing air to enter the cylinder.
Compression: The second stroke is the compression stroke. The piston moves back up, compressing the air in the cylinder. The intake and exhaust valves are closed during this stroke.
Ignition and Power: The third stroke is the power stroke. When the air is compressed, a spark plug ignites the air-fuel mixture, resulting in a power stroke that forces the piston down.
Exhaust: The fourth stroke is the exhaust stroke. The exhaust valve opens, and the piston moves up the cylinder, pushing the burnt gases out of the cylinder.
Repetition: The four-stroke cycle repeats, with one power stroke for every two revolutions of the crankshaft.
Key characteristics of four-stroke engines:
More complex due to the use of separate intake and exhaust valves.
Better fuel efficiency and lower emissions compared to two-stroke engines.
Separate oil lubrication system for engine components.
Commonly used in a wide range of applications, including cars, motorcycles, trucks, and industrial machinery.
In summary, the fundamental difference between two-stroke and four-stroke engines lies in the number of strokes required to complete a full engine cycle and the way they handle air intake, compression, combustion, and exhaust. Each type of engine has its own set of advantages and disadvantages, making them suitable for different applications and industries.
Many thanks indeed
Craig Kirkman (Owner and Creator of the 'The Repair Specialist' Channel) Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. www.amazon.co....
#TwoStrokeEngine
#TwoStrokePower
#ScavengingProcess
#TwoStrokeTechnology
#EngineSimplicity
#TwoStrokePerformance
#TwoStrokeCycle
#TwoStrokeEfficiency
#TwoStrokeAdvantages
#TwoStrokeApplications
#TwoStrokeMotor
#TwoStrokeMotorcycle
#SmallEngine
#ChainsawEngine
#BoatMotor
#TwoStrokeMaintenance
#TwoStrokeTuning
#TwoStrokeEmissions
#OilMixing
#TwoStrokeVsFourStroke
#FourStrokeEngine
#FourStrokeCycle
#FourStrokePower
#EngineEfficiency
#CleanEmissions
#FourStrokeTechnology
#FourStrokeAdvantages
#InternalCombustion
#AutomotiveEngine
#FourStrokePerformance
#CarEngine
#MotorcycleEngine
#IndustrialMachinery
#TruckEngine
#FourStrokeMaintenance
#FourStrokeTuning
#LubricationSystem
#EmissionControl
#FuelEfficiency
#FourStrokeVsTwoStroke
Brilliant, it’s the first time I’ve been able to understand both engines. Thanks for this.
Im 50 year old man !! ,I own a car, scooter , chainsaw, strimmer , and other things what use gas but only after watching this video I understood
what is actually happening inside those things I take for granted. This video should be thought-shown at school to make boys feel more comfortable with the machinery and the same time create plenty of would be engineers .Thank you for you excellent explanation ,you definitely a very good teacher for me.!!!!
Awesome! I always had a pretty good idea of how a 4 stroke engine worked, but the 2 stroke was somewhat of a mystery to me. This side by side comparison is fantastic. Thank you!
This is the best video I hav seen on this matter. Honestly, the way you go into the depth of theory vs practice is just what I need! Thank you!
Thanks for all your time and effort making this video.
I have a two stroke strimmer that would not start, there was a healthy spark and fuel was getting through after scratching my head for a long time I stopped scratching and started pulling my hair out but eventually found the problem, the exhaust was slightly loose.
I didn't realise how important the exhaust was on a two stroke.
Your videos are very easy to follow maybe you could do one on a basic two stroke exhaust.
Thanks again
Andy.
I hope I'm not mistaken but I recognize your voice you help me build my first racing quad much appreciated accidentally run into your knowledge of two and four stroke engines you're a man of Science and fun if you're not teaching we're not learning keep at it
This is really amazing. I always look for trouble shooting and repair videos that are based on the item or type of item I'm working on. The basic understanding of two cycle, as compared to 4 cycle engines that I gained from this video have helped me to diagnose problems and repair them faster. The better understanding of engine design helps identify how problems occur before they occur and brings a better understanding of the importance of the maintenance procedures. But most of all, I save time not having to search online to identify engine components and ordering parts is better when you know what to look for and what you need the first time.
iTs AmAZinG OOGA BOOGA
Wow! Way to articulate! Great job! Thanks for the superb effort!
Fantastic. Very clear and comprehensible!
Thank you for making this very clear, informative video! Your contributions such as this are enjoyable to watch! Keep it up!
Anyone else having trouble with the audio? Great video
bravo......excellent job....thank you for such a great video
I saw a 5 minute video on how a 2-stroke engine works. I like short videos since they usually explain things well but it glossed over everything. I needed a longer explanation! Good video explained well I was hesitant at first with my both started at the same yet the 2-stroke was doing nothing as if magic. Then you explained it was still in the cord pull phase the person's effort to start the engine was still moving it at that point. It almost feels like we could improve the 2-stroke design to be less smoky and maybe put the transfer port on its own doesn't it? Maybe right side lower down but not have fuel/air mix in the crankcase.
Thank you for your comment and feedback. I really appreciate it. Craig
Superbly explained and illustrated!
Excellent video. Used this to explain engines to several people. I disagree with your fact between 15 and 16 minutes about a vacuum being formed if the exhaust valve stays shut. The reason the piston is moving down is down to the fuel exploding and needing to take up more space. No external air would be required if the air and fuel mix was right.
If the exhaust valve was open then the combustion would simply exit the exhaust as fire.
At least that's my understanding of it. Feel free to correct me if I'm wrong.
Either way, great video. Thanks for making such an effort.
It is opening right after combustion, not during the combustion. By doing this you just make it easier for piston to move down and cool the cylinder. Its is a double win-win situation for engine.
You are correct. Actually, the exhaust starts opening a bit before BDC and will be fully open on the exhaust stroke.
Your videos and explanation are excellent. Thank you very much for sharing ❤️
superb explanation. very clear and simple illustration. Thanks
1/4 of video is him fighting off Know-It-All people who want to sound important by pointing out flaws in the video.
Really good video this. I'm sure that I could show this to my little sister and she'd understand. I checked out your channel and I'll probably be watching every video if they're the same quality :)
I think you're a great teacher - Now I finally understand !
Many thanks.
This video should be in every engineering school basics. Very well done.
mr. reapir specialist, can you please comment here if I can copy this video and use it in a class room..?? Thank you.
Timothy Jones, thank you for your comment. Please feel free to use my actual video. Thanks for asking. Craig
ouwe graff takke homo
Thank you for your clear explanation video!
Very well done.
It was starting and running as sweet as a nut last night when I tightened the exhaust now 12 hours later it starts but bogs down I will have another think and buy a wig.
Thanks
Andy.
Great video: explains the different workings of the 2 vs 4-stroke engine very detailed and in easy to understand terms! :)
Someone give this man a cookie !
Excellent I love it. So informative 👏
great explanation
Do any 4 stroke engines gear down the flywheel to avoid the unnecessary spark during the exhaust stroke? although it's probably negligible, there is of course some loss of energy from the unnecessary spark...
plasterbrick I don’t think so it really does help burn off excess
Wouldn't the 2 stroke have a vacuum at the top end also
mate your a life saver.
Good explanation, thanx
Great explanation of the respective orders of operations. Very thorough. VERY. ;) it is abundantly clear when an orator appreciates the language- and very much the sound produces upon making use of that language. 😉 shit man. I started the comment when I thought you were done- you could’ve made three vids - remember this isn’t a Live explanation. People can rewind or even rewatch as often as needed. The repeating is incredibly frustrating and to some, even a bit insulting. A tip? Idk- you DID make my understanding of this Very clear and Thank You!
Thank you for your feedback. I'm refining things all of the time and getting to know what is best for the audience. It's taking time but i'm getting there. Thanks again!
@@TheRepairSpecialist I really enjoyed the explanation thanks, it went in better and made me still think about what was going on, as this is a video for people who are not familiar at all, I appreciate it and fully understood at the end of the video. Thank you.
guru of the year!
This is great, thanks.
Volks wagon beetles are four strokes with some with stock engine and fourstroke and two strokes dirt bike has and chainsaws and.grass trimmers school buses have four strokes semis etc
Excellent!
Genius🔥🔥🔥red🔥🔥🔥
Location of all your videos in one place, please
You forgot,
2 stroke has 2 piston rings
4 stroke has 3 piston rings
But are four stroke desires Volkswagen regular car gas now they became turbo c performance turbo's school buses trucks too
explanation is not good, take a short time with clear explanation