How Four Stroke Engines Work (How It Works - 4 Stroke)
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- Опубліковано 5 жов 2024
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Learn how four stroke engines work! The animation in this video shows you exactly how a four stroke diesel engine works and also how a four stroke petrol/gasoline engine works. You will learn all of the engine’s main parts and how an internal combustion (IC) engine works!
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▶️Introduction
Four stroke (4 stroke) diesel engines have been used for over 100 years and their design has not changed significantly during this time. A four stroke engine consists of:
1. Piston
2. Connecting Rod (Con Rod)
3. Pushrod
4. Plain Bearings
5. Inlet Valves
6. Exhaust Valves
7. Springs
8. Camshaft
9. Crankshaft
10. Combustion Space (Cylinder Liner)
The four stroke engine requires four strokes to complete one combustion cycle. The strokes are:
1. Suction
2. Compression
3. Power (Ignition)
4. Exhaust
The suction stroke draws air into the cylinder liner (combustion space) as the piston moves down towards bottom dead centre (BDC). When the piston reaches BDC, the inlet valves close and the piston travels back upwards towards top dead centre (TDC).
As the piston moves towards TDC, the air in the cylinder is compressed and its temperature and pressure increases. Shortly before TDC, diesel fuel (or petrol/gasoline) is injected into the combustion space. The fuel ignites and a controlled explosion occurs.
Petrol/gasoline engines use spark plugs for ignition, whilst diesel engines use only the heat generated due to compression. For this reason, petrol engines are known as spark ignition engines and diesel engines are known as compression ignition engines.
Once ignition occurs, the power stroke begins. The increase in pressure and temperature crated by fuel combustion pushes the piston towards BDC. Once at BDC, all the fuel within the combustion space has been burnt and the final engine stroke is ready to begin.
The exhaust stroke is the fourth and final stroke. The piston rises from BDC to TDC and expels exhaust gas from the combustion space via the exhaust valves. Once the piston reaches TDC, the air inlet valves open and the exhaust valves close a short time later (there is some valve overlap to ensure all exhaust gas has been removed from the combustion space).
The combustion cycle is now complete as all four strokes have occurred.
This type of engine utilises direct fuel injection; common rail fuel injectors are also used.
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Want to continue learning about engineering with videos like this one? Then visit:
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Want to teach/instruct with the 3D models shown in this video? Then visit:
savree.com/en
Very good presentation
Very informative..
Thanks a lot for sharing this video..
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.
Absolutely phenomenal! MASTERFUL lesson for visual learners!! Thank you! I’m excited to find your channel!
Welcome aboard!
Thank you Mr. SaVRee for your interesting and very educating videos. I have really learnt a lot from your videos here. My understanding relating to marine engine and machineries have broaden, and my doubts have been cleared. Please, also do a video on HFO/LO purifiers. I really need your animation showing the working principle of purifiers.. THANK you once again.
This video fill in some knowledge gaps from other videos I saw in trying to understand my WWII jeep's L-134 motor. Thanks so much for making the video, very informative!
The best video on 4 stroke IC engine on UA-cam!
Efficient to learn and visualizing gives more enthusiasm to me for those things. Complicated and dens explanation and full of mediocare information books driving me a crazy after a while. Thank you saVRee! You the best
I come to this video after watching your video about 2 stroke engine. That 2 stroke engine video is the best explanation about 2 stroke engine and I need explanation from one person about 4 stroke engine, and today you uploaded this video, what a coincidence. I am very enjoy with your style of explanation.
@@savree-3d A question, 6:00 if explosion makes piston moves downward, what make piston moves upward?
Clear voice, easy to undertand, superb animations!, overall this short clip is among the best oyt there
Your work and explanation is phenomenal
I hope if you could make a video for the Stirling engine or nuclear power plant.
Great clear and slowly explained. Will be using in my lessons, thank you!
Wonderfully clear explanations!
Thanks.
this was so beautifully explained. thank you so much!
perfect illustration
Lovely video man great explanations I think I got a grasp on how engines work thanks to you 👍
Very nice video thank you so much keep doing
i am subscribing to this immediately.
I really enjoyed your video, because I like learning. Your video is excellent at explaining things and I'll be watching many more. I like learning about engineering especially vehicles, in my spare time. I'd recommend your videos!!
Keep making more. Thanks!!!
Thanks for sharing you are a teacher
Excellent indepth video
This was really helpful thank you!
Thank you very much for your work!
This video is very useful and helpful
Really liked ur. loved it really helped me a lot!,,,
Sir you are great....please make video on fuel injection pump (FIP)
great video, very well explained
Perfect Video, Thanks for sharing
Thank you
Great 🙏 thank you very much
It is really helpful video.... Thank you so much...PLZ upload video on Thermal Conductivity also
.
Good teacher
thank you for this very informative video, its so easy to understand😊
Best of the videos on the topic!
Wow, thanks!
Wow very intresting.
Nice demo... Thanks
My pleasure!
Great explanation and very good animation. Would you mind to let me know what animation program that you use it on this video? Thanks
Thanks for the work
Any time
it wasn't clear as to what force caused the initial downstroke..
if it was air, what made the air fill the cylinder initially and give it enough pressure to push the piston down.....thx for any help...
thanks for the help
I am Madol Mabor from South Sudan, I would like to learn more about Toyota Land cruisers and it systems... Thank you
excellent
How cranck shaft pushes the piston from BDC to TDC .. What isthe source force for cranck shaft to give movement to piston
rotational inertia caused by the crank shaft counter weights and Flywheel, and the other two cylinders firing 180 deg from BDC
Great video. Thank you. What force allows the piston to travel back down in the suction stroke and up in the compression and exhaust strokes? Is enough energy provided in the power stroke to allow for the other 3 strokes to occur or are other forces at play? Thanks.
Sorry. I just read one of your other replies. You already answered the question. Thanks.
I mean, it's details like that which need to be specified in a how an engine video works video as long as this one. Every video on UA-cam provides simplistic explanations like the one in this video.
Thanks for the explanation
But what about glow plugs
Doesn’t a diesel engine use glow plugs?
Thank You Sir
Thank you so much, this is exactly what I wish I had learned at school instead of learning when Henry VIII died …
lmao, as if we remember that mate
Again, another video that exclusively explains the 4 stroke system. Some of us are at the point where we gotta learn how everything comes together.
How is it guaranteed that the crank shaft doesn't revert back and make a rotation ? Is it just because of the momentum ?
謝謝！
Excellent
Thanks
Can you do a video about purifier
won't there be any wear on the head of the push rod as it's constantly rubbing against the cam ?
thanks
No problem
How heat to use for ignition ?
Specifically to get good combustion
Wonderful wonderful
What force to make a stroke down for suction process? If to my understanding that one bang only make piston stroke down once. Sorry for my English.
@@savree-3d I got it. I can't supposedly think 4 strokes engine only have one cylinder. :)
I am having same doubt. Can you please answer again??
how about magnet brake?
I would greatly appreciate if you could do one.
perfect
Great
If my teachers explained as clearly as this, I wouldn't have failed the exam.
So.how.many top dead center do we have in this xycle
The certificates are they recognised by any college?
Unfortunately not. The main reason is that there is no international body that recognises certificates in so many countries. We are working to get them recognised though as continuous learning credits, which are issued from London, and internationally accepted.
Would I be wrong if I say intake stroke , compression stroke, power stroke, and exhaust stroke, what u call exhaust gas, couldn’t it be called , burnt air fuel mixture witch become exhausted out once the piston pushes them out on the exhaust stroke?
Sasura ka nati galat galat padata hai
wrong- the fuel is injected, at "timing"as per engine requirement. it is srayed into the the compressed air near TDC-per timimg
In ships we will use two stroke engines not four stroke right.
Please reply
Sry above I mentioned a question and I got reply answer from you thank you.
QCU? Anyone haha
The crankshaft counterweight is 180⁰ opposed to where it should be.